JPH08104099A - Electronic black board device - Google Patents

Abstract

PURPOSE: To improve the utilization efficiency of a sheet body by constituting a black board surface so that the rear not positioned on the black board surface does not possess a sheet body, by a method wherein an endless sheet body which is extended circulatably freely and forms the black board surface is formed as a Mobius band. CONSTITUTION: Although an electronic black board layer 1 possesses an endless sheet body, since the sheet body 2 is joined to the other end by reversing an end of a long-sized sheet body, the sheet body 2 is formed as a Moebius band. The first to third support rollers 4-6 are arranged in a regular triangle within a boxlike device main body 3, and supported turnably freely by shafts each and the sheet body 2 is extended circulatably freely by these support rollers 4-6. Therefore, the sheet body 2 formed as the Moebius band is extended circulatably freely by the first to third support rollers 4-6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard device in which an endless sheet is stretched in a circulating manner to form a blackboard surface.

[0002]

2. Description of the Related Art Conventionally, a general electronic blackboard device has a blackboard surface on which an image is written with a pen or the like, which is formed by circling an endless sheet body in a circulating manner. The described image can be read by the image reading mechanism and copied on the printing paper by the printer.

During a meeting, an image handwritten on the blackboard surface of the electronic blackboard device can be copied on a large number of printing sheets and distributed to the participants, and each of the participants can display the blackboard surface of the electronic blackboard device. Since it is not necessary to copy the image of, it is possible to improve the efficiency of the conference.

The electronic blackboard device as described above generally has an endless sheet body, and the endless sheet body is stretched by a pair of support rollers arranged in parallel so as to be able to circulate. ing. The front surface of the sheet member thus stretched in a flat plate shape is the blackboard surface and the rear surface is the processing surface, and the image reading mechanism is arranged opposite to this processing surface.
When reading the image handwritten on the blackboard surface of the sheet body by the image reading mechanism, the sheet body is circulated to sequentially move the image on the blackboard surface to the position of the processing surface, and the image is read by the image reading mechanism at the position of the processing surface. Read sequentially.

Further, it has been proposed to arrange an image printing mechanism for printing an image on the sheet body at a position facing the processing surface of the sheet body.

In this case, in order to print the image on the sheet body, the image is printed by the image printing mechanism at the position of the processing surface while circulating the sheet body. By sequentially circulating the sheet body from this state, the image printed by the image printing mechanism on the processing surface can be positioned and posted on the blackboard surface.

It has also been proposed to dispose a cleaner for erasing the image on the sheet body at a position facing the processing surface of the sheet body.

In this case, in order to erase the image of the sheet body, the sheet body is circulated to sequentially move the image on the blackboard surface to the position of the processing surface, and the image is sequentially erased by the cleaner at the position of the processing surface.

[0009]

In the electronic blackboard device described above, the image handwritten on the blackboard surface of the sheet body can be read by the image reading mechanism, and the image can be printed on the sheet body by the image printing mechanism. You can also erase the image of the sheet with a cleaner.

However, since only the outer peripheral surface of the endless sheet body is used and the inner peripheral surface cannot be used, the utilization efficiency of the sheet body is poor.

[0011]

According to the first aspect of the present invention,
In an electronic blackboard device in which an endless sheet body is stretched in a circulating manner to form a blackboard surface, the sheet body is formed as a Mobius strip.

According to a second aspect of the present invention, in the first aspect of the invention, a position managing means for detecting the circulation of the sheet body and managing the position of the surface is provided.

According to a third aspect of the present invention, in the first aspect of the present invention, three support rollers are arranged in an equilateral triangle, and each is rotatably supported, and the support roller stretches the sheet body. did.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a roller drive mechanism is provided that drives at least two of the three support rollers to rotate.

According to a fifth aspect of the present invention, in the third aspect of the present invention, bevel gears are provided at opposite ends of the two support rollers, and a bevel gear that engages with these bevel gears is used as a drive motor. Connected.

According to a sixth aspect of the invention, in the third aspect of the invention, a cleaner for erasing the image on the sheet body is provided in the vicinity of one supporting roller.

According to a seventh aspect of the invention, in the sixth aspect of the invention, the cleaner is arranged in the vicinity of the support roller located first or second from the blackboard surface in the sheet body circulation direction.

According to an eighth aspect of the invention, in the third aspect of the invention, at least one of the three support rollers has a function of erasing the image on the sheet body.

According to a ninth aspect of the invention, in the invention of the third aspect, the sheet body is stretched at the position of the blackboard surface by the first supporting roller and the second supporting roller, and the third supporting roller is It has the function of erasing the image on the sheet.

The invention according to claim 10 is the invention according to claim 8 or 9.
In the invention described above, the support roller having a function of erasing the image on the sheet body has support portions for supporting the sheet body at both ends, and a cleaner for erasing the image at the center portion.

According to an eleventh aspect of the invention, in the invention of the tenth aspect, the peripheral speed of the cleaner is set higher than the peripheral speed of the support portion.

According to a twelfth aspect of the present invention, in the invention according to the tenth aspect, a third support roller is rotatably supported at both ends of the support shaft and the support shaft, and a center of the support shaft. A roller drive mechanism which is formed by a cleaner connected to the first support roller and drives the third support roller to rotate in association with the first support roller and the second support roller, which face each other. In addition to the roller drive mechanism, a cleaner drive mechanism for rotationally driving the support shaft of the third support roller is provided.

According to a thirteenth aspect of the present invention, in the invention of the tenth aspect, the third support roller is rotatably supported by the support shaft and both ends of the support shaft, and the center of the support shaft. And a support shaft formed of a cleaner connected to the first support roller and a second support roller, which rotate in cooperation with the first support roller and the second support roller facing each other. An interlocking drive mechanism that rotates at different speeds was provided.

According to a fourteenth aspect of the present invention, in the third aspect of the invention, a position managing means for detecting the circulation of the sheet body and managing the position of the surface is provided, and the sheet body is provided in the vicinity of one supporting roller. A cleaner for erasing an image is provided, operation instruction means for instructing the operation of the cleaner is provided, and cleaner control means for controlling the operation of the cleaner according to instruction information of the operation instruction means and position information of the position management means is provided. It was

According to a fifteenth aspect of the invention, in the invention of the third aspect, the central portion of the support roller has a smaller diameter than both end portions.

The blackboard referred to in this specification means a panel for displaying an image, and does not mean that it is black.

[0027]

According to the first aspect of the present invention, since the endless sheet body which is stretched in a circulating manner to form the blackboard surface is formed as a Mobius strip, the sheet body does not have a back surface which is not located on the blackboard surface.

According to the second aspect of the present invention, the position management means detects the circulation of the sheet body and manages the position of the surface to form the Mobius strip so that the position of the image of the sheet body that is extremely long can be determined. to manage.

According to a third aspect of the present invention, the sheet body is formed as a Mobius strip by stretching the sheet body with three supporting rollers arranged in an equilateral triangle and each of which is rotatably supported. Stretches satisfactorily with a simple structure.

According to the fourth aspect of the present invention, the roller driving mechanism rotatably drives at least two of the three support rollers to rotate, whereby the sheet body formed as the Mobius strip is circulated favorably.

According to a fifth aspect of the present invention, by engaging the bevel gears provided at the opposite ends of the two support rollers with the bevel gears connected to the drive motor, the two rollers have a simple structure. The support roller is interlocked and driven to rotate.

According to the sixth aspect of the present invention, the image provided on the sheet body is erased inside the apparatus by the cleaner provided in the vicinity of the one support roller erasing the image on the sheet body.

According to a seventh aspect of the present invention, a sheet member formed as a Mobius strip by arranging a cleaner in the vicinity of a support roller which is located first or second from the blackboard surface in the circulation direction of the sheet member. Since the image written from the outside to the inside moves to the inside, the image written on the sheet body is erased at the position of the blackboard surface before moving to the inside.

The invention described in claim 8 is characterized in that at least one of the three supporting rollers has a function of erasing the image of the sheet body, so that the image described from the outside on the sheet body formed as the Mobius strip is formed. Moves to the inside, so
The image on the sheet body is erased at the inner position by the support roller.

According to a ninth aspect of the present invention, the third supporting roller that does not stretch the sheet body at the position of the blackboard surface has a function of erasing the image of the sheet body, so that the image of the sheet body interferes with the blackboard surface. Erase at a position not to use.

According to a tenth aspect of the present invention, the supporting roller having a function of erasing the image on the sheet body supports the sheet body at both edges by the supporting portions at both ends, and the center of the sheet body is supported by the central cleaner. Erase some images.

According to the eleventh aspect of the present invention, by making the peripheral speed of the cleaner faster than the peripheral speed of the supporting portion, the surface of the cleaner is moved faster than the surface of the sheet body, and the image of the sheet body is made good by this cleaner. to erase.

According to a twelfth aspect of the present invention, the roller driving mechanism rotationally drives the first supporting roller, the supporting portions of both the second supporting roller and the third supporting roller, and separately from this, the cleaner. The cleaner of the third support roller is rotationally driven by the drive mechanism.

According to the thirteenth aspect of the present invention, the interlocking drive mechanism rotationally drives both the first support roller, the second support roller, and the support portions of both the third support roller and the third support roller. The cleaner of the roller is driven to rotate at a speed different from that of the supporting portion.

According to the fourteenth aspect of the present invention, the cleaner control means controls the operation of the cleaner in accordance with the instruction information of the operation instruction means and the position information of the position management means, so that an image of a desired position of an extremely long sheet is displayed. Erase selectively.

According to a fifteenth aspect of the present invention, the diameter of the central portion of the supporting roller is smaller than that of the both end portions, so that the sheet member is supported by both end portions of the supporting roller, and the central portion of the supporting roller is an image of the surface of the sheet member. Not to touch.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. It should be noted that FIG. 1 corresponds to a state in which a rear cover (not shown) of the electronic blackboard device 1 of the present embodiment is removed and is visually recognized from the rear.

First, the electronic blackboard device 1 of this embodiment is shown in FIG.
As shown in FIG. 3, the sheet body 2 has an endless sheet body 2. This sheet body 2 is formed by inverting one end of a long sheet body (not shown) and joining it to the other end. Is formed as.

Inside the box-shaped apparatus body 3, first to third support rollers 4 to 6 are arranged in an equilateral triangle and are rotatably supported respectively.
At 6, the sheet body 2 is stretched and circulated.

More specifically, the sheet body 2 is passed from the front side of the first support roller 4 to the front side of the second support roller 5, and from the rear side of the second support roller 5 to the first support roller 4. It is passed through the rear side of the third support roller 6, and the front side of the third support roller 6 is passed through the rear side of the first support roller 4. For this reason, the sheet body 2 formed as a Mobius strip is stretched around the first to third support rollers 4 to 6 in a circulatory manner.

The first to third support rollers 4-6 are used.
Are arranged in order according to the circulation direction of the sheet body 2 and arranged in an equilateral triangle, so that the respective axial directions intersect each other at 60 °. Although FIG. 1 depicts the support rollers 4 to 6 as a perspective view for easy understanding, they do not look like this in an actual device.

A rectangular opening 7 is formed on the front surface of the apparatus body 3.
Since the sheet body 2 is stretched by the first supporting roller 4 and the second supporting roller 5 and faces the opening hole 7 from the rear side, the opening hole 7 is formed.
The surface of the sheet body 2 exposed from above is the blackboard surface 8.

The blackboard surface 8 in the circulating direction of the sheet body 2
A cleaning brush 9, which is a cleaner, is arranged near the third support roller 6 located second from the above. The cleaning brush 9 is a roller-shaped brush and is rotatably supported by a drive motor (not shown).
A solenoid (not shown) movably supports the third support roller 6 in a direction in which the third support roller 6 comes into contact with and separates from below. Since the rotation direction of the cleaning brush 9 is set to the opposite direction to the rotation direction of the third support roller 6, the cleaning brush 9 scrapes the surface of the sheet body 2 in the moving direction. .

Further, the first to third support rollers 4 to
As shown in FIG. 2, 6 has both ends 11 at the central portion 10.
The support shaft 12 is formed to have a smaller diameter, and the support shafts 12 project from both ends 11 on both sides. The diameter D1 of the central portion 10 and the diameter D2 of the both end portions 11 are set such that the first to third support rollers 4 to 6 stretch the sheet body 2 at the both end portions 11 and circulate the sheet body 2. Also, the sheet body 2 is set so as not to contact the central portion 10.

As shown in FIG. 3, there is provided a roller drive mechanism 13 which drives the second support roller 5 and the third support roller 6 to rotate in association with each other. More specifically, the bevel gears 14 are attached to the support shafts 12 at the end portions of the second support roller 5 and the third support roller 6 which face each other.
15 is mounted, and one bevel gear 16 with which these bevel gears 14, 15 engage is a drive shaft 18 of a drive motor 17.
It is fixed to. It should be noted that three bearings 20 are mounted on the frame 19 of the roller drive mechanism 13, and the bearings 20 and the two support shafts 12 are mounted on these bearings 20.
And are positioned.

Position management means (not shown) for managing the position of the sheet body 2 is also provided. More specifically, as shown in FIG. 4, a plurality of screens 21 corresponding to the blackboard surface 8 are set as “one page, two pages ...” On the surface of the sheet body 2, and these screens are displayed. A bar code 22 for identification is formed on the upper edge portion of 21. A bar code reader 23 is arranged on the second supporting roller 5 at a position facing the sheet body 2, and the position management means uses the bar code 22 read by the bar code reader 23 to read the sheet body. The position of the second screen 21 is recognized and managed. Since the sheet body 2 is formed as a Mobius strip so that the usable surface is doubled, at least six pages can be set on the screen 21.

Further, cleaner control means (not shown) for controlling the operation of the cleaning brush 9 is provided. More specifically, an operation panel 24, which is an operation instructing means, is provided at the lower edge of the front surface of the apparatus body 3, and the operation panel 24 operates the cleaning brush 9 and the number of pages of the screen 21. Is designated, the cleaner control unit erases the image of the screen 21 of the designated number of pages by the cleaning brush 9 by a logical operation of the instruction information of the operation panel 24 and the position information of the position management unit.

Although illustration and description have been omitted here, the electronic blackboard device 1 of the present embodiment is also provided with a mechanism that is common to existing electronic blackboard devices. That is, a support plate for supporting the sheet body 2 on the rear side of the blackboard surface 8, a sheet reading mechanism for reading and scanning an image of the sheet body 2 inside the apparatus main body 3, a frame memory for temporarily storing image information, A printer device for printing an image on a printing sheet, an image scanner for reading and scanning an image of a document, a sheet printing mechanism for printing an image on the sheet body 2 inside the device body 3, a facsimile mechanism for communicating image information with the outside, And so on.

With such a structure, the electronic blackboard device 1 of this embodiment can be used in the same manner as the conventional electronic blackboard device.

That is, since the blackboard surface 8 is formed by stretching the sheet body 2, it is possible to write an image on the blackboard surface 8 with a pen or the like, and the sheet body 2 is circulated in sequence. The screen 21 on which the image is written at the position of the blackboard surface 8 moves to the inside of the apparatus body 3, and the new screen 21 of the sheet body 2 becomes the blackboard surface 8.

Therefore, the image written on the sheet body 2 at the position of the blackboard surface 8 is read by the sheet reading mechanism and stored in the frame memory, and this image information is printed on the printing paper by the printer or by the facsimile mechanism. It can also be sent to the outside. In addition, the image information read from the original by the image scanner and the image information received from the outside by the facsimile mechanism are stored in the frame memory,
It is also possible to print this image information on the sheet body 2 by the sheet printing mechanism and post it on the blackboard surface 8.

Since the sheet body 2 as described above is formed as a Mobius strip, when the sheet body 2 is circulated, the entire area of the surface moves to the position of the blackboard surface 8. Therefore, as compared with a normal endless sheet (not shown) having the same length, the area that can be used as the blackboard surface 8 is doubled, and the sheet body 2 is extremely effectively used.

Moreover, although the sheet body 2 is formed as a Mobius strip, it is stretched by the first to third support rollers 4 to 6 arranged in an equilateral triangle so as to satisfactorily circulate with a simple structure. Since the roller drive mechanism 13 drives the two support rollers 5 and 6 in conjunction with each other, the sheet body 2 formed as a Mobius strip can be satisfactorily circulated with a simple structure. In particular, the second and third support rollers 5 and 6 driven by the roller driving mechanism 13 are sequentially located downstream of the blackboard surface 8 in the circulation direction of the sheet body 2 and upstream of the blackboard surface 8. Since the first supporting roller 4 that does not operate is not driven, the sheet body 2 is stretched well at the position of the blackboard surface 8.

In this way, the sheet body 2 is moved to the roller driving mechanism 1
The operation of circulating in 3 will be specifically described below. First, when the user manually operates the operation panel 24 to instruct to replace the blackboard surface 8, the drive motor 17 of the roller drive mechanism 13 is driven and the second and third support rollers 5 and 6 move in the same direction. Rotate to. These support rollers 5,
Since the sheet body 2 is circulated by the rotation of 6, the blackboard surface 8
The screen 21 located on the second support roller 5 moves to the second support roller 5, and the screen 21 located on the first support roller 4 moves to the blackboard surface 8.

At this time, the bar code reader 23 reads the bar code 22 of the screen 21 moved from the position of the blackboard surface 8 onto the second supporting roller 5, so that the driving of the roller driving mechanism 13 is stopped at an appropriate timing. Then, the position management means recognizes the number of pages of the screen 21 located on the blackboard surface 8. That is, since the sheet body 2 is formed as a Mobius strip, the usable surface is doubled. However, since the position of the screen 21 is managed by the position management means, the specific screen 21 is designated. Various tasks can be executed.

By sequentially circulating the sheet body 2, the screen 21 moved from the position of the blackboard surface 8 to the second supporting roller 5 is moved to the third supporting roller 6, and the third supporting roller 6 is moved. It is also possible to erase the image on the screen 21 on the roller 6 with the cleaning brush 9.

The operation of erasing the image on the sheet body 2 with the cleaning brush 9 in this manner will be specifically described below. First, in the case of uniformly erasing the image of the entire area of the sheet body 2, the operation panel 24 is manually operated to instruct to start the erasure of the entire area. Then, the roller driving mechanism 13 is driven to circulate the sheet body 2, and the cleaning brush 9 composed of a roller-shaped brush is rotationally driven on the surface of the sheet body 2, so that the image of the entire area of the sheet body 2 is cleaned. It is sequentially erased by the brush 9. Since the sheet 2 is formed as a Mobius strip, it is necessary to cycle the sheet twice in order to erase the image in the entire area.

At this time, since the moving direction of the peripheral surface of the rotating cleaning brush 9 is the same as the moving direction of the surface of the abutting sheet body 2, the cleaning brush 9 does not become a resistance to the circulation of the sheet body 2. When the efficiency of image erasing is important and the circulation of the sheet body 2 is not hindered, the rotation direction of the cleaning brush 9 may be reversed.

Further, the image on the specific screen 21 of the sheet body 2 can be selectively erased. In this case, the operation panel 24 is manually operated to instruct the serial number of the screen 21 and the image deletion. Then, the roller driving mechanism 13 is driven to circulate the sheet body 2, and the designated screen 21 is sequentially conveyed to the position of the cleaning brush 9 by the management of the position management means, and the image is erased.

Since the image on the sheet body 2 can be selectively erased by the cleaning brush 9 in this manner, the image written on the sheet body 2 is saved without being erased by the cleaning brush 9, and the blackboard surface 8 It is also possible to post it again at the position. In this case, since the sheet body 2 is formed as a Mobius strip, the image on the surface of the sheet body 2 is the same as the surface of the first to third support rollers 4 to 6 before returning to the position of the blackboard surface 8. opposite.

However, these support rollers 4 to 6 support the sheet body 2 at both ends 11 having a large diameter, and the central portion 1 having a small diameter.
Since 0 is released from the sheet body 2, the supporting rollers 4 to 6 do not come into contact with the image described on the sheet body 2 and the image of the sheet body 2 is not damaged, and the supporting roller 4
~ 6 will not get dirty.

Further, the image written on the sheet body 2 at the position of the blackboard surface 8 can be immediately erased when the sheet body 2 is circulated. In this case, the cleaning brush 9
Faces the third support roller 6 which is located second from the blackboard surface 8 in the circulation direction of the sheet body 2, so if the image of the sheet body 2 is erased at this position, this image is generated by the support roller 4. It never faces the surface of ~ 6. In other words, if the image written on the sheet body 2 at the position of the blackboard surface 8 is surely erased by the cleaning brush 9 on the third supporting roller 6, the central portion 10 of the supporting rollers 4 to 6 has a smaller diameter than both end portions 11. You don't have to.

The same applies to the case where the cleaning brush 9 is arranged to face the second supporting roller 5. In other words, in the electronic blackboard device 1 of the present embodiment, the central portion 10 of each of the first to third support rollers 4 to 6 has a smaller diameter than the end portions 11, so that the cleaning brush 9 is attached to the first support roller 4. There is no problem even if they are placed facing each other.

Further, since ink powder adheres to the cleaning brush 9, this ink powder is removed from the cleaning brush 9.
It is preferable to provide a scraper or a bias roller for removing from the cleaning brush 9, and it is desirable to provide a container for collecting the ink powder removed from the cleaning brush 9.

Further, the roller drive mechanism 13 of this embodiment is used.
Is rotatably driven by interlocking the second and third support rollers 5 and 6, so that the sheet body 2 can be stretched well at the position of the blackboard surface 8 and circulated well. The present invention is not limited to the embodiment, and a roller driving mechanism (not shown) or the like that drives all of the first to third support rollers 4 to 6 in interlocking rotation can be realized. Such a roller driving mechanism is added to the above-mentioned roller driving mechanism 13 to directly engage the bevel gears provided at the ends of the third supporting roller 6 and the first supporting roller 4 which face each other. It can be realized by Similarly, in addition to the roller driving mechanism 13, it can also be realized by engaging the bevel gears provided at the opposite ends of the first support roller 4 and the second support roller 5 with the intermediate bevel gear, It is also possible to provide all of the mechanisms described above.

Further, in the electronic blackboard device 1 of this embodiment,
The roller driving mechanism 13 includes the second and third support rollers 5,
6, bevel gears 14 and 15 provided at the end portion of the bevel gear 6, a bevel gear 16 engaged with the bevel gears 16, and a single drive motor 1 for rotationally driving the bevel gears 16.
However, the present invention is not limited to the above embodiment, and for example, a roller drive mechanism having the same function can be formed by a universal joint, a spur gear train, and a drive motor. Is.

In the electronic blackboard device 1 of this embodiment, the bar code 22 is formed on each of the plurality of screens 21 set on the sheet body 2, and the bar code reader 23 reads the bar code 22 to manage the position. Although it has been described that the means manages the position of the screen 21, the present invention is not limited to the above embodiment. For example, the sheet 2 is formed of a magnetic material, a magnetic stripe is recorded, and the magnetic stripe is read by a magnetic reader, whereby the position management unit detects the movement of the sheet 2 and manages the position of the screen 21. can do.

As shown in FIG. 4, in the sheet body 2 formed as a Mobius strip, the front and back sides (actually, since the front and back sides do not exist, this is the case where the sheet body 2 is viewed locally. ), The screen 21 is turned upside down. Therefore, even if a magnetic stripe is recorded on the upper edge of the screen 21 or the like, since it is located on the lower edge on the back side, the magnetic stripes do not overlap on the front and back sides.

If the accuracy of conveyance of the sheet body 2 by the roller drive mechanism 13 is good, the position management means detects the movement of the sheet body 2 from the rotation of the drive motor 17 of the roller drive mechanism 13 and determines the position of the screen 21. The second embodiment of the present invention will be described below with reference to FIG. Regarding the electronic blackboard device 25 of the present embodiment, the same parts as those of the electronic blackboard device 1 described as the first embodiment are designated by the same names and reference numerals, and detailed description thereof will be omitted.

First, the electronic blackboard device 25 of this embodiment is different from the above-mentioned electronic blackboard device 1 in the structure of the third supporting roller 26, and the cleaning brush 9 facing the third supporting roller 26 is Not provided.

The third support roller 26 includes one support shaft 27, support portions 28 and 29 rotatably supported at both ends of the support shaft 27, and a central portion of the support shaft 27. It is formed by a cleaning brush 30 which is a cleaner attached. Therefore, the third support roller 2
Reference numeral 6 has a function of supporting the sheet body 2 by the support portions 28 and 29 at both ends, and a function of erasing the image of the sheet body 2 by the cleaning brush 30.

A bevel gear 15 is mounted on the support portion 28 at one end of the third support roller 26, and the bevel gear 15 is mounted on one end of the second support roller 5. 14 together with a bevel gear 1 axially supported by a drive motor 17
6 is engaged. A bevel gear 31 is also mounted on the support portion 29 at the other end of the third support roller 26. This bevel gear 31 is attached to a bevel gear 32 mounted on one end of the first support roller 4. It is directly engaged. Bevel gears are also mounted on the other end portions of the first support roller 4 and the second support roller 5 that face each other, and these bevel gears are engaged via an intermediate bevel gear (Fig. (Not shown).

With such a mechanism, the roller driving mechanism 1
The drive motor 17 of the third support roller 28 of the first support roller 4, the second support roller 5, and the third support roller 26,
29, and each of these support portions 28, 29 is rotatably driven in conjunction with the first support roller 4 and the second support roller 5 which face each other.

A cleaner drive mechanism 33 is connected to one end of the support shaft 27 of the third support roller 26. The cleaner drive mechanism 33 includes a spur gear 34 mounted on the support shaft 27, a spur gear 35 that engages with the spur gear 34, and a drive motor 3 that rotationally drives the spur gear 35.
It consists of 6 and 6. By the cleaner driving mechanism 33, the cleaning brush 30 of the third supporting roller 26 is rotationally driven separately from the supporting portions 28 and 29. The cleaning brush 30 and the supporting portions 28 and 29 rotate in the same direction, but the peripheral speed of the cleaning brush 30 is set to be higher than the peripheral speed of the supporting portions 28 and 29.

In the electronic blackboard device 25 of this embodiment having such a structure, the third supporting roller 26 supports the sheet body 2 by the supporting portions 28 and 29 at both ends, and the cleaning brush 30 in the central portion. The image on the sheet body 2 is erased. Therefore, it is not necessary to arrange a cleaner outside the first to third support rollers 4, 5, 26, and the size can be reduced.

In the electronic blackboard device 25 of this embodiment,
Since the image written on the sheet body 2 always contacts the cleaning brush 30 of the third supporting roller 26, it is optimal when the image written on the sheet body 2 is erased every time without being saved. When it is desired to store the image described on the sheet body 2, it is preferable that the cleaning brush 30 has a structure capable of retracting.

Further, since the rotation direction of the cleaning brush 30 of the third support roller 26 is the same as the rotation direction of the support portions 28 and 29, the rotating cleaning brush 30 does not become a resistance to the circulation of the sheet body 2. Since the rotation speed of the cleaning brush 30 is higher than the rotation speed of the support portions 28 and 29, the cleaning brush 30 can satisfactorily erase the image on the sheet body 2 even if the rotation direction is the same. Since the roller drive mechanism 13 and the cleaner drive mechanism 33 are provided separately, the circulation speed of the sheet body 2 and the rotation speed of the cleaning brush 30 can be individually changed, and the cleaning ability can be adjusted according to the usage situation. Can be set appropriately.

The sheet body 2 is stretched at the position of the blackboard surface 8 by the first and second supporting rollers 4 and 5, and the third supporting roller 26
Since the cleaning brush 30 is provided in the above, even if the sheet body 2 vibrates at the position of the third support roller 26 due to the rotation of the cleaning brush 30, the sheet body 2 does not vibrate at the position of the blackboard surface 8. The user can use the blackboard surface 8 satisfactorily. The cleaning brush 30
Therefore, when the sheet body 2 does not vibrate or when the vibration of the sheet body 2 can be eliminated by a guide plate (not shown) or the like, the cleaning brush 30 is provided on the first support roller 4 and the second support roller 5. It is also possible.

Next, a third embodiment of the present invention will be described below with reference to FIG. Regarding the electronic blackboard device 37 of the present embodiment, the same parts as those of the electronic blackboard device 25 described above as the second embodiment are designated by the same names and reference numerals, and detailed description thereof will be omitted.

First, in the electronic blackboard device 37 of this embodiment,
The bevel gear 16 engaged with the bevel gears 14 and 15 of the second support roller 5 and the third support roller 26 is not connected to the drive motor 17, and is supported by the support portion 29 of the second support roller 26. An interlocking drive mechanism 38 is connected to the shaft 27.

First, spur gears 34 and 39 are mounted on the support shaft 27 and the support portion 29, respectively.
Spur gears 35 and 40 that engage with motors 4 and 39, respectively, are mounted on a single drive motor 36. Further, the support portion 29 of the third support roller 26 and the first support roller 4 are connected to each other by the bevel gear 3
1, 32, the first support roller 4 and the second support roller 5 are connected by a bevel gear (not shown), and the support portion 28 of the second support roller 5 and the third support roller 26 is connected. And are connected by bevel gears 14-16.

With such a mechanism, the drive motor 36 of the interlocking drive mechanism 38 causes the supporting portions 28 and 2 of the first supporting roller 4, the second supporting roller 5, and the third supporting roller 26 to operate.
9 and the cleaning brush 30, and by the interlocking drive mechanism 38, the supporting portions 28, 2 of the first supporting roller 4, the second supporting roller 5, and the third supporting roller 26.
9 and the cleaning brush 30 are rotationally driven. The rotation directions of the support portions 28 and 29 of the third support roller 26 and the cleaning brush 30 are the same, but the spur gear 3
Cleaning brush 30 by 4, 39, 35, 40
The peripheral speed of is set to be higher than the peripheral speed of the support portions 28 and 29.

In the electronic blackboard device 37 of the present embodiment having such a structure, the interlocking drive mechanism 38 drives the single drive motor 36 to drive the first to third support rollers 4, 5, 26.
Since the cleaning brush 30 of the third support roller 26 is driven to rotate, the size can be reduced.

In the electronic blackboard device 37 of this embodiment,
When the sheet body 2 is circulated, the cleaning brush 30
Since it always rotates, it is optimal when the image written on the sheet 2 is erased each time without saving.

[0090]

According to the first aspect of the present invention, in an electronic blackboard device in which an endless sheet member is stretched in a circulating manner to form a blackboard surface, the sheet member is formed as a Mobius strip. Since the area available on the blackboard surface is doubled as compared with the case of the normal endless structure, the sheet body can be effectively used.

According to the second aspect of the invention, by providing the position management means for detecting the circulation of the sheet body and managing the position of the surface, a large number of images recorded on the sheet body are managed,
It is possible to selectively move a desired image to the position on the blackboard surface.

According to the third aspect of the present invention, the three support rollers are arranged in an equilateral triangle, each of which is rotatably rotatably supported, and the sheet body is stretched by these support rollers to form a Mobius strip. Since the formed sheet body can be favorably stretched with a simple structure, it is possible to realize an electronic blackboard device having a large number of blackboard surfaces with a simple structure.

According to the fourth aspect of the present invention, by providing the roller driving mechanism for rotating at least two of the three support rollers in conjunction with each other, the sheet body formed as the Mobius strip is circulated well. Therefore, it is possible to realize an electronic blackboard device having many blackboard surfaces with a simple structure.

According to a fifth aspect of the present invention, a bevel gear is provided at opposite ends of the two support rollers, and a bevel gear that engages with these bevel gears is connected to a drive motor. Since the two supporting rollers can be rotationally driven by the motor, the sheet body formed as the Mobius strip can be circulated favorably, and an electronic blackboard device with many blackboard surfaces can be realized with a simple structure. it can.

According to the sixth aspect of the invention, a cleaner for erasing the image of the sheet body is provided in the vicinity of one supporting roller, so that the image written on the sheet body can be erased inside the apparatus without requiring manpower. can do.

According to the seventh aspect of the invention, the cleaner is arranged near the supporting roller which is located first or second from the blackboard surface in the circulation direction of the sheet body. This image can be erased with a cleaner before the sheet moves inward and comes into contact with the supporting roller, so that the supporting roller can be prevented from being soiled.

According to the invention of claim 8, at least one of the three supporting rollers has a function of erasing the image of the sheet body, so that the image described from the outside on the sheet body is moved to the inside and supported. At the time of contact with the roller, the image on the sheet can be erased by the supporting roller, and it is not necessary to dispose a cleaner on the outer side of the supporting roller, so that the size can be reduced.

According to a ninth aspect of the invention, the sheet member is stretched at the position of the blackboard surface by the first supporting roller and the second supporting roller, and the third supporting roller erases the image of the sheet member. Since the sheet body does not vibrate at the position of the blackboard surface even when the sheet body vibrates due to the operation of erasing the image by the third supporting roller, the blackboard surface can be used satisfactorily. it can.

According to a tenth aspect of the invention, the supporting roller having a function of erasing the image of the sheet body has supporting portions for supporting the sheet body at both ends and a cleaner for erasing the image in the central portion. As a result, it is possible to realize a supporting roller that supports the sheet body and erases the image with a simple structure.

According to the eleventh aspect of the present invention, the peripheral speed of the cleaner is set higher than the peripheral speed of the supporting portion, so that the image on the sheet body can be satisfactorily erased.

In a twelfth aspect of the present invention, the third support roller is formed by a support shaft, a support part rotatably supported at both ends of the support shaft, and a cleaner connected to the central part of the support shaft. , A roller drive mechanism for rotating and driving each of the support portions of the third support roller in association with the first support roller and the second support roller facing each other. By providing the cleaner drive mechanism that rotationally drives the support shaft of the support roller, the roller drive mechanism can rotationally drive the first to third support rollers to circulate the sheet satisfactorily. With this, the cleaner can be rotationally driven to satisfactorily erase the image on the sheet body, and the circulation speed of the sheet body and the rotation speed of the cleaner can be individually changed, so that the cleaning ability can be set appropriately. Kill.

According to a thirteenth aspect of the present invention, the third support roller is formed by a support shaft, a support portion rotatably supported at both ends of the support shaft, and a cleaner connected to the central portion of the support shaft. , An interlocking drive mechanism for interlocking each of the support parts of the third support roller with the first support roller and the second support roller facing each other to rotate and drive the support shaft at different speeds is provided. As a result, the first to third support rollers and the cleaner can be rotationally driven by one interlocking drive mechanism, so that the size can be reduced.

According to a fourteenth aspect of the present invention, position management means for detecting the circulation of the sheet body and managing the position of the surface is provided.
A cleaner for erasing the image of the sheet body is provided in the vicinity of one supporting roller, and operation instruction means for instructing whether or not the cleaner is operated is provided. According to the instruction information of the operation instruction means and the position information of the position management means. By providing the cleaner control means for controlling the operation of the cleaner, it is possible to selectively erase a large number of images on the sheet body.

According to the fifteenth aspect of the present invention, since the central portion of the supporting roller has a smaller diameter than both end portions, the central portion of the supporting roller does not come into contact with the surface of the sheet body, so that the image recorded on the sheet body is supported. The rollers are not disturbed, and the supporting roller is not stained with the image of the sheet body.

[Brief description of drawings]

FIG. 1 is a rear view showing an internal structure of an electronic blackboard device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a support roller.

FIG. 3 is a vertical sectional rear view showing a roller driving mechanism.

FIG. 4 is a schematic diagram illustrating circulation of a sheet body.

FIG. 5 is a vertical sectional rear view showing a main part of the electronic blackboard device of the second embodiment.

FIG. 6 is a vertical cross-sectional rear view showing the main part of the electronic blackboard device of the third embodiment.

[Explanation of symbols]

 1,25,37 Electronic blackboard device 2 Sheet body 4-6,26 Support roller 8 Blackboard surface 9,30 Cleaner 10 Central part 11 Both ends 13 Roller drive mechanism 14-16 Bevel gear 17 Drive motor 27 Support shaft 28,29 Support Part 33 Cleaner drive mechanism 38 Interlocking drive mechanism

Front Page Continuation (72) Inventor Junichi Kawase 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (15)

[Claims] 1. An electronic blackboard device in which an endless sheet member is stretched in a circulating manner to form a blackboard surface, wherein the sheet member is formed as a Mobius strip. 2. The electronic blackboard device according to claim 1, further comprising position management means for detecting the circulation of the sheet body and managing the position of the front surface. 3. The electronic blackboard device according to claim 1, wherein three support rollers are arranged in an equilateral triangle, each is rotatably supported, and the sheet body is stretched by these support rollers. . 4. The electronic blackboard device according to claim 3, further comprising a roller driving mechanism that rotationally drives at least two of the three supporting rollers in conjunction with each other. 5. The electronic blackboard according to claim 3, wherein a bevel gear is provided at opposite ends of the two support rollers, and a bevel gear engaging with these bevel gears is connected to a drive motor. apparatus. 6. The electronic blackboard device according to claim 3, wherein a cleaner for erasing the image on the sheet body is provided in the vicinity of one supporting roller. 7. The electronic blackboard device according to claim 6, wherein a cleaner is arranged in the vicinity of the support roller located first or second from the blackboard surface in the sheet body circulation direction. 8. The electronic blackboard device according to claim 3, wherein at least one of the three support rollers has a function of erasing an image on the sheet body. 9. A sheet member is stretched at a position on a blackboard surface by a first supporting roller and a second supporting roller, and a third supporting roller has a function of erasing an image on the sheet member. The electronic blackboard device according to claim 3. 10. A support roller having a function of erasing an image on a sheet body has support portions for supporting the sheet body at both ends, and a cleaner for erasing the image at a central portion. Item 10. The electronic blackboard device according to item 8 or 9. 11. The electronic blackboard device according to claim 10, wherein the peripheral speed of the cleaner is higher than the peripheral speed of the support portion. 12. A third support roller is formed by a support shaft, a support portion rotatably supported at both ends of the support shaft, and a cleaner connected to a central portion of the support shaft. Is provided with a roller driving mechanism for rotating and driving the supporting portions of the supporting rollers of the first supporting roller and the second supporting roller in opposition to each other, and separately from the roller driving mechanism. 11. The electronic blackboard device according to claim 10, further comprising a cleaner drive mechanism that rotationally drives a support shaft of the roller. 13. A third support roller is formed by a support shaft, a support portion rotatably supported at both ends of the support shaft, and a cleaner connected to a central portion of the support shaft. Is provided with an interlocking drive mechanism for interlocking each of the support parts of the support roller with the first support roller and the second support roller facing each other to rotate and drive the support shaft at different speeds. The electronic blackboard device according to claim 10, which is characterized in that. 14. A position management means for detecting the circulation of the sheet body and managing the position of the surface is provided, a cleaner for erasing the image of the sheet body is provided in the vicinity of one supporting roller, and an operation of the cleaner is instructed. 4. An electronic blackboard device according to claim 3, further comprising: an operation instructing unit for controlling the operation of the cleaner according to instruction information of the operation instructing unit and position information of the position managing unit. . 15. The electronic blackboard device according to claim 3, wherein the central portion of the support roller has a smaller diameter than both end portions.