JPH09277785A - Device for erasing written content on recording face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the scattering of erasing waste to be generated all around when a written content is erased by an eraser in a written content erasing device on a recording face. SOLUTION: An eraser 57 is provided to be brought into contact with or away from on a recording face (a). The eraser 57 is provided with a base 58 formed into the cylindrical shape, a suction space 58a from inside the base, a plurality of air suction holes 58b running through inside to outside and a sliding body (brush hair) 59 planted on the outer periphery. The suction space 58a of the eraser 57 is connected with a dust collector 65 by a suction pipe 64. When a written content is erased, the eraser 57 is rotated and brought into contact with the recording face (a), and the recording face (a) is carried in one direction, and the written content on the recording face is rubbed and erased by the eraser 57. At that time, erasing waste to be generated is sucked from the suction holes 58b into the air suction space 58a by operating the dust collector 65, passed through inside the suction pipe 64 and sucked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a writing content erasing device for erasing written contents such as characters, pictures, tables, and graphs on a recording surface such as a white board, bulletin board, message board, and electronic blackboard. More specifically, it relates to one in which an erasing body is pressed against a recording surface, and the erasing body is brought into sliding contact by relative movement with the recording surface to scrape the contents written on the recording surface.

[0002]

2. Description of the Related Art Conventionally, for example, in an electronic blackboard, as shown in FIG. 12, a driving roller 1 and a driven roller 2 are used.
There is a structure in which an endless recording medium 3 is wound between them to form a recording surface a on the surface.

[0003] When using the electronic blackboard,
Characters, pictures, tables, graphs and the like are written on the recording surface a using a writing instrument such as a marker ink pen. When recording the written content on a sheet, the recording medium 3 is conveyed and the written content on the recording surface a is read by a reading mechanism unit (not shown).
Then, the signal from the reading mechanism section is put into a printer (not shown), reduced and recorded on a sheet, and printed out.

By the way, some such electronic blackboards are equipped with a writing content erasing device A for erasing the writing contents written on the recording surface a, as shown in the figure. The support indicated by reference numeral 5 in the drawing comprises a support shaft 6 serving as a rotation support point, a pair of upper and lower support plates 7 and 8, and a connecting shaft 9 connecting one ends of the support plates 7 and 8 to each other. An eraser 10 is rotatably supported and provided on the other ends of the plates 7 and 8. The erasing body 10 has a roller shape, and a brush 11 which is a sliding contact body is spirally provided on the outer periphery of the erasing body 10 to transmit the rotation from the roller driving motor M via a belt 12. The connecting shaft 9 of the support 5 is connected to the tip of the operating rod of the solenoid 13.

When erasing the contents written on the recording surface a, the solenoid 13 is actuated to draw the connecting shaft 9 and the support 5 is rotated about the support shaft 6 to record the brush 11 of the eraser 10. Press on surface a. And the recording medium 3
And the roller drive motor M
Was driven to rotate the eraser 10, and the brush 11 scratched off the contents written on the recording surface a.

[0006]

However, in the conventional writing contents erasing apparatus for such a recording surface, the erasing body 10 is used.
However, there is a problem that eraser dust generated when the written content on the recording surface a is erased is scattered around.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent erasure dust generated at the time of erasing from scattering around in the above-mentioned written content erasing device on the recording surface.

[0008]

Therefore, the invention described in claim 1 is, for example, as in the following embodiment.
In a writing content erasing device on a recording surface, in which the erasing body 57 is pressed against the recording surface a and relative to the recording surface a, the writing content on the recording surface a is erased by the erasing body 57. A sliding contact body 59 which is in sliding contact with the recording surface a to scrape off the contents written on the recording surface a, and a sliding space 58a which supports the sliding contact body 59 inside and has suction holes 58b inside and outside.
And a base body 58 that communicates with the base body 58 through the air suction space 58a, and a dust collecting device 65 that sucks the air in the suction space 58a and sucks the erased dusts through the suction holes 58b.

According to the first aspect of the invention, at the time of erasing, the erasing body 57 is pressed against the recording surface a, and by the relative movement with respect to the recording surface a, the content of writing on the recording surface a is made by the sliding contact body 59. Scrape off. At that time, the dust collector 65 is operated, and the generated debris is put into the suction space 58a through the intake hole 58b and sucked into the dust collector 65.

According to a second aspect of the invention, in the writing content erasing device B on the recording surface a according to the first aspect, the base body 58 is formed into a cylindrical shape as in the following embodiment. To form the suction space 58a therein, and press-fit and seal one end of the drive shaft 53 from one end of the base body 58 in the axial direction, and insert the fixed shaft 61 in the other end of the base body 58 from the axial direction. The base body 58 is rotatably supported via a sealed bearing 60, and a fixed shaft 61 thereof is provided with a through hole 61b for communicating the suction space 58a with the dust collecting device 65. .

According to the second aspect of the invention, at the time of erasing, the rotation of the drive shaft 53 is transmitted to the base body 58 to erase the erasing body 5.
7 is rotated, and the content of writing on the recording surface a is erased by the sliding contact body 59. At that time, the generated debris is efficiently sucked into the suction space 58a through the suction hole 58b, and the through hole 6b
It leads to the dust collector 65 through 1b.

According to a third aspect of the present invention, in the writing content erasing device B on the recording surface a according to the first or second aspect, the writing on the recording surface a is performed, as in the following embodiment. A cam mechanism C for gradually separating the erasing body 57 from the recording surface a while continuing the relative movement after erasing the contents.
It is characterized by comprising.

According to the third aspect of the invention, the cam mechanism C is driven to gradually reduce the pressing force of the erasing body 57 on the recording surface a while continuing the relative movement after the erasing is completed.

According to a fourth aspect of the present invention, in the writing content erasing device B on the recording surface a according to the first or second aspect, the writing on the recording surface a is performed, as in the following embodiment. After erasing the contents, the relative movement direction of the recording surface a and the erasing body 57 is changed.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 11 shows a leg-supporting type electronic blackboard provided with a writing content erasing device for a recording surface, which is an embodiment of the invention described in claim 1.

The electronic blackboard indicated by reference numeral 20 in the drawing is horizontally supported so that it stands up with legs 21. The frame case 22 of the electronic blackboard 20 has a flat rectangular box shape, and has a large window hole 22a in the front. A part of the recording medium 23 in the form of an endless sheet which is stretched in the frame case 22 as described later is exposed from the window 22a, and a part of the recording surface a is made to face there flat.

In front of such a frame case 22, an elongated tray 25 on which a writing instrument 24 and the like are placed is attached along the lower edge. As the writing instrument 24, a marker ink pen or the like for writing characters or pictures on the recording surface a is used.

Below the frame case 22, the printer 27 having the paper receiver 26 in front and the two storage cases 28 and 29 are mounted side by side in this order. On the other hand, a switch group 30 is provided on one side edge of the frame case 22. The switch group 30 includes a transport switch for transporting the recording medium 23 and a read switch for reading the content written on the recording medium 23.

A driving roller 33 and a driven roller 34 are provided on the left and right sides of the frame case 22 in parallel with each other as shown in FIG. As the drive roller 33, a rubber roller such as chloroprene rubber or silicone rubber having a relatively large friction coefficient and a high elasticity is used. The above-mentioned endless recording medium 23 is spanned between the rollers 33 and 34, and the driven roller 34 is urged by a spring (not shown) so that both rollers 33 and
Stretched between 34. Then, by operating the conveyance switch of the switch group 30 described above, the rotation from the drive motor 35 is transmitted via the belt 36 to rotate the drive roller 33, and the driven roller 34 is driven to rotate, thereby moving the recording medium 23 in the drawing. It can be transported to the left and right.

A reading mechanism portion 37 is provided in the frame case 22 as shown in the figure. The reading mechanism section 37 reads the contents written on the recording surface a as the recording medium 23 is conveyed, and includes a fluorescent lamp 38 and a mirror 3.
9, a lens 40, a photoelectric conversion element 41, and the like.

When using this electronic blackboard,
A writing tool 24 is used to write characters and pictures on the recording surface a. When recording the written contents on the paper, the read switch in the switch group 30 is operated to move the recording medium 23.
Then, the reading mechanism section 37 reads the contents written on the recording surface a. Then, a signal from the reading mechanism section 37 is input to the printer 27 via the control section 31, the read contents are reduced and recorded on a sheet provided in the printer 27, and the sheet receiver 26
Print out to

By the way, the writing content erasing device for the recording surface provided on the electronic blackboard described above has the configuration shown in FIGS. 1 and 2 in detail. FIG. 2 shows the peripheral portion of the writing content erasing device B when the inside of the electronic blackboard is viewed from the back side.

Reference numeral 45 in FIG. 2 is a support frame. The support frame 45 is provided with the side plate portions 45a facing each other by bending both ends, and the mounting piece portions 45b are provided by bending the lower ends of the side plate portions 45a in the drawing outward. Then, the attachment piece 45b is attached to the inner surface of the frame case 22 via the slide unit 46, and is erected in a U-shape to drive the drive roller 33.
It is arranged on the outside of the side parallel to it.

As shown in FIG. 3, the slide unit 46 includes an outer rail member 47 in which edges 47a on both sides are slightly raised, a slider member 48 slidably accommodated in the outer rail member 47, and outer members thereof. The rail member 47 includes an edge portion 47 a and a plurality of balls 49 housed between the slider member 48. Then, as shown in FIG. 2, the outer rail member 47 is fixed to the inner surface of the frame case 22, and the mounting plate portion 45b of the support frame 45 is screwed to the slider member 48.

Therefore, as shown in FIG. 2, the drive motor 5 is provided on the inner surface of one side plate portion 45a of the support frame 45 described above.
0 is attached. Then, the motor shaft is projected to the outside through the side plate portion 45a, one of the belts 51 is wound around a motor pulley (not shown) on the motor shaft, and the other of the belts 51 is wound around the drive pulley 52.

As shown in FIG. 4, the drive pulley 52 is attached to one end of the drive shaft 53, and a washer 54 is attached to prevent the drive pulley 52 from coming off. The other end of the drive shaft 53 is integrally provided with an enlarged boss portion 53a. The drive shaft 53 is rotatably supported by the side plate portion 45a via the bearing 55, and the boss portion 53a is attached to one end of the erasing body 57.

The erasing body 57 includes a base body 58 and a sliding contact body 59.
Consists of The base body 58 is formed in a slightly elongated cylindrical shape, and is provided with a suction space 58a inside and a plurality of intake holes 58b penetrating inside and outside. The sliding contact body 59 is formed by bundling a large number of brush bristles made of an antistatic member such as carbon fiber in a straight line, and is provided in the axial direction at intervals in the circumferential direction of the base body 58 as shown in FIG. . Then, as shown in FIG. 4, the boss portion 53a of the drive shaft 53 is press-fitted from one end of the base body 58 in the axial direction to hermetically seal the one end 61a of the fixed shaft 61 from the other end of the base body 58 in the axial direction. The sealed bearing 60 into which the erasure is inserted is press-fitted and supported by the drive shaft 53 and the fixed shaft 61, and the erasing body 57 is provided outside the drive roller 33 in parallel therewith.

As shown in FIG. 6, the hermetically sealed bearing 60 is provided with annular seal members 62 at the inner circumferences of both ends in the axial direction, and the seal members 62 are pressed against the outer circumference of one end 61a of the fixed shaft 61. On the other hand, the fixed shaft 61 is made of, for example, a metal member, and as shown in FIG. 4, a through hole 61b is provided at the center in the axial direction, and the through hole 61b is aligned with the window hole 45c provided in the other side plate portion 45a. It is fixed to the side plate portion 45a with a screw 63.

Then, the fixed shaft 61 is passed through the window hole 45c.
One end of the suction pipe 64 is screwed into the through hole 61b. On the other hand, the other end of the suction pipe 64 is, as shown in FIG. 2, a dust collector 65 fixed to the inner surface of the frame case 22.
It is inserted in the outer case 66 of.

The exterior case 66 of the dust collecting device 65 is provided with a suction fan and a dust collecting bag (not shown).

By the way, one ends of the tension coil springs 67 are hooked on both sides of the support frame 45 described above. The other ends of the tension coil springs 67 are hooked on the locking protrusions 68 that are raised from the inner surface of the frame case 22. Then, the erasing body 57 is always held at the pressing release position apart from the recording medium 23. In addition, the cam mechanism C is provided at a position substantially in the middle of the length of the support frame 45.
Are provided adjacent to each other.

The cam mechanism C comprises a cam drive motor 70, and a cam member 69 is mounted on the motor shaft.

Therefore, when erasing the contents written on the electronic blackboard, the erase switch of the switch group 30 is pushed to simultaneously drive the drive motor 50, the suction fan (not shown) of the dust collector 65, and the cam drive motor 70. To drive.

Then, the rotation from the drive motor 50 is transmitted through the belt 51 to rotate the eraser 57 counterclockwise in FIG. In addition, the suction force of the suction fan causes the suction holes 58b.
Inhale air from. Further, the cam member 69 is rotated in the direction of arrow b in FIG.

With the rotation of the cam member 69, the supporting frame 45 is pushed against the tension coil spring 67. Then, the slider member 48 slides in the outer rail member 47 to move the support frame 45 to the recording medium 23 side, and the recording medium 2
When the erasing body 57 is pressed against the recording surface a of No. 3, the state shown in FIG. 7 is obtained.

Thereafter, the rotation from the drive motor 35 is transmitted via the belt 36 to rotate the drive roller 33, and the recording medium 23 is conveyed in the direction of arrow c in FIG. 7 while the driven roller 34 is driven to rotate. Then, the writing content on the recording surface a is scraped off by the sliding contact body 59 of the erasing body 57.

At this time, the generated debris is sucked together with air into the suction space 58a through the intake hole 58b, and is further collected in the dust collecting bag of the dust collecting device 65 through the through hole 61b and the suction pipe 64.

After erasing the written contents on the recording surface a, however, the cam drive motor 70 is driven in the reverse direction to drive the cam member 69.
Is rotated in the direction of arrow d in FIG. Then, the recording medium 23
The cam member 69 while continuing the relative movement between the erasing body 57 and the erasing body 57.
The erasing body 57 is gradually separated from the recording medium 23 from the pushing position shown by the solid line in FIG. 8 to the pushing release position shown by the alternate long and short dash line. Then, the pushing force of the erasing body 57 gradually weakens and the pushing state against the recording surface a changes, and the erasing body 57
The erased debris stopped by is sucked without remaining on the recording surface a. Then, after the eraser 57 is moved to the pushing release position, the driving of the drive motor 50, the suction fan, and the cam drive motor 70 described above is stopped.

According to the second aspect of the present invention, as shown in the embodiment of FIGS. 1 to 8 described above, the base body 58 is formed into a cylindrical shape to form the suction space 58a therein, and the base body 58 is formed. One end of the drive shaft 53 is press-fitted and sealed from one end of the base body 58 while the fixed shaft 61 is inserted from the other end of the base body 58 from the axial direction to the base body 58 via the sealed bearing 60.
Is rotatably supported, and a fixed shaft 61 thereof is provided with a through hole 61b for communicating the suction space 58a and the dust collecting device 65 with each other.

Then, at the time of erasing, the rotation of the drive shaft 53 is transmitted to the base body 58 to rotate the erasing body 57, and the sliding contact body 59 erases the written contents on the recording surface a. At that time, the generated debris is efficiently sucked through the suction holes 58b into the suction space 58.
It is sucked into a and guided to the dust collecting device 65 through the through hole 61b.

Further, according to the third aspect of the invention, as shown in the embodiment of FIGS. 1 to 8 described above, after the erasing of the written contents on the recording surface a is completed, the relative movement is continued and the recording surface a is maintained. It is characterized by comprising a cam mechanism C for gradually separating the erasing body 57.

Then, the cam mechanism C is driven to gradually weaken the pressing force of the erasing body 57 on the recording surface a while continuing the relative movement after the erasing is completed.

In the embodiment of FIGS. 1 to 8 described above, the pressing state of the erasing body 57 is gradually weakened while the relative movement is continued after the erasing is completed, and the pressing state is changed. However, in the invention described in claim 4, the eraser 57
After erasing the recording surface a, the recording surface a and the eraser 5
It is characterized in that the relative movement direction of 7 is changed. That is, after erasing the recording surface a with the erasing body 57, the drive motor 35 is reversely driven to reversely rotate the drive roller 33 in the direction of arrow e as shown in FIG. 9, and the driven roller 34 is driven and reversely rotated for recording. The medium 23 is conveyed in the direction of arrow f in the figure.
After that, the drive roller 33 is normally rotated in the direction opposite to the direction indicated by the arrow in the figure. This is repeated once or more to change the pressing state of the erasing body 57 against the recording surface a and suck the erased dust blocked by the erasing body 57 without leaving it on the recording surface a.

In the embodiment shown in FIG. 9, the erasing body 57 changes the moving direction of the recording surface a after the erasing is completed. However, although not shown, after erasing the recording surface a by the erasing body 57, the erasing body 57 is not
The rotation direction of may be changed.

It should be noted that, in all of the above-described illustrated embodiments, the example of the electronic blackboard provided with the writing content erasing device on the recording surface has been described. However, it is not limited to this,
The present invention can be similarly provided to, for example, a blackboard, a white board, a bulletin board, a message board, and the like, which have an erased residue when erased by the eraser 57.

Further, in all the illustrated embodiments described above, the writing contents are erased by rotating both the recording surface a and the erasing body 57. However, if the recording surface a and the erasing body 57 move relative to each other, the written contents can be erased. Therefore, only one of the recording surface a and the erasing body 57 may be rotated. Further, the contents to be written may be erased not only by rotating them but also by reciprocating the erasing body 57 in a straight line.

Further, in all the illustrated embodiments described above, in the eraser 57, the sliding contact bodies 59 are provided in the axial direction at intervals in the circumferential direction of the cylindrical base body 58. But,
For example, as shown in FIG. 10, the erasing body 57 may have a configuration in which a sliding contact body 59 is provided in a spiral shape on the outer periphery of a cylindrical base body 58.

Furthermore, the base body 58 of the erasing body 57 is not limited to a cylindrical shape, but various shapes are conceivable, and the sliding contact body 59 of the erasing body 57 is made of felt, sponge, or the like other than brush bristles. You can

[0049]

As described above, according to the first aspect of the present invention, at the time of erasing the writing contents on the recording surface, the sliding contact body of the erasing body is pressed against the recording surface and the relative contact with the recording surface is made. By sliding the erasing body by moving it, the contents written on the recording surface are erased.
At that time, the dust collector is operated, and the generated debris is sucked into the suction space through the air intake hole, so that the erased debris can be prevented from scattering around at the time of erasing. In addition, the entire apparatus can be made smaller than, for example, a device in which erased dust is sucked from the outside of the eraser to collect dust.

According to the second aspect of the present invention, one end of the drive shaft is press-fitted into one end of the base body and the fixed shaft is inserted into the other end of the base body so as to be rotatably supported via the sealed bearing. Therefore, it is possible to prevent eraser debris from entering the rotating part to cause poor rotation, and to prevent air from flowing in from both ends of the base body, and to suck in the eraser debris efficiently by sucking air exclusively through the intake holes. it can.

According to the third aspect of the invention, the urging force of the erasing body on the recording surface is gradually weakened while the suction state is maintained after the erasing is completed and the relative movement between the erasing body and the recording surface is continued. Therefore, according to the invention of claim 4, since the relative movement direction of the recording surface and the erasing body is changed while the suction state is continued after the erasing is completed, the pressing state of the erasing body with respect to the recording surface is changed and the erasing is performed. It is possible to remove erased debris blocked by the body without leaving it on the recording surface.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an internal mechanism of an electronic blackboard provided with an apparatus for erasing written contents on a recording surface according to the first aspect of the invention.

FIG. 2 is a perspective view of a peripheral portion of a write content erasing device showing the inside of the electronic blackboard as viewed from the back side.

FIG. 3 is a partially cutaway perspective view of a slide unit included in the written content erasing device.

FIG. 4 is a longitudinal sectional view of an eraser portion of the written content erasing device.

FIG. 5 is a partial external perspective view of the eraser itself.

FIG. 6 is a vertical cross-sectional view of the other end portion of the eraser.

FIG. 7 is a perspective view of a peripheral portion of the written content erasing device when the eraser is in a pushing position.

FIG. 8 is an explanatory diagram for explaining that the erasing body is gradually separated from the recording surface after the erasing is completed.

FIG. 9 is a schematic configuration diagram of a part of the internal mechanism of an electronic blackboard provided with a device for erasing written contents on a recording surface according to the fourth aspect of the invention.

FIG. 10 is a partial external perspective view of another eraser used in the written content eraser of the present invention.

FIG. 11 is an external perspective view of the entire electronic blackboard.

FIG. 12 is a partial perspective view of an internal mechanism of an electronic blackboard provided with a conventional writing content erasing device on a recording surface.

[Explanation of symbols]

 B Written content erasing device C Cam mechanism a Recording surface 53 Drive shaft 57 Erasing body 58 Base body 58a Suction space 58b Air intake hole 59 Sliding contact body 60 Sealed bearing 61 Fixed shaft 61b Through hole 65 Dust collector

Claims (4)

[Claims] 1. An apparatus for erasing written contents on a recording surface, wherein an eraser is pressed against a recording surface and relative movement with respect to the recording surface causes the erased contents to be erased by the eraser. On the other hand, there are provided a sliding contact body which is in sliding contact with the recording surface to scrape off the contents written on the recording surface, and a base body which supports the sliding contact body and which has a suction space inside and communicates the inside and the outside through an air intake hole. An apparatus for erasing written contents on a recording surface, comprising a dust collector that sucks air in a suction space and sucks erased dust through the suction hole. 2. The base body is formed into a cylindrical shape to form the suction space therein, and one end of a drive shaft is axially press-fitted into one end of the base body while the other end of the base body is axially sealed. 2. A fixed shaft is inserted from the direction to rotatably support the base body via a sealed bearing, and a fixed hole is provided in the fixed shaft to connect the suction space and the dust collecting device. A device for erasing written contents on the recording surface according to. 3. The recording surface according to claim 1, further comprising a cam mechanism for gradually separating the erasing body from the recording surface while continuing relative movement after erasing the recording surface with the erasing body. Write content erasing device. 4. An apparatus for erasing written contents on a recording surface according to claim 1, wherein the relative movement direction between the recording surface and the erasing body is changed after erasing the recording surface with the erasing body.