JP2810848B2 - Erasing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erasing apparatus for automatically erasing characters and the like written on a blackboard, a white board and the like.

[0002]

2. Description of the Related Art Conventionally, blackboard wiping and whiteboard wiping have been used to erase characters and the like written on a blackboard, a white board and the like. The black and white wiping was performed by fixing a wiping portion in which a brushed cloth was wound around an elastic core material to a base. However, this black and white wiping operation is troublesome in that the surface of the fabric is clogged with powder such as white powder and black powder each time it is used. There was.

In the Japanese Patent Application No. 2-86221, the applicant of the present application can automatically erase characters written on a black or white board, etc., in order to release the above-mentioned troublesomeness. , An erasing device equipped with means for sucking and collecting powder such as black powder. The erasing device includes a plurality of erasing rollers forcibly rotated by a driving motor, a brush for removing powder such as white powder and black powder attached to the erasing roller, and absorbing the powder removed by the brush. It is a configuration consisting of a dust collection chamber.

[0004]

However, in the above-mentioned erasing device, the powder removed by the brush is not immediately absorbed by the dust collecting chamber, but once floats in the space above the erasing roller. Therefore, if the suction capacity in the dust collecting chamber is low, the powder floating in the air cannot be completely sucked, and the unsucked powder adheres to the erasing roller again, and the wiping ability is reduced. . In particular, when a large amount of powder is sucked into the filter in the dust collecting chamber, the suction capacity is reduced, and the above-mentioned problem becomes more remarkable.

[0005] The powder not sucked into the filter is
There is also a problem that it is accumulated between the filter and the drive motor, hinders the rotation of the suction fan, and lowers the suction capacity. Furthermore, since a brush for removing powder is required and a driving device for forcibly rotating the brush is also required, there is a problem that the structure is complicated and the cost is high.

The present invention has been devised in view of the above problems, and when powder attached to an erasing roller is brushed off, the powder is sucked into a dust collecting chamber almost at the same time, so that the powder absorbing efficiency is increased and the powder is absorbed by a filter. It is an object of the present invention to provide an extremely inexpensive erasing device having a simple structure, in which powder that has not been circulated is circulated in a case main body, and powder is always absorbed by a filter without accumulating in one place.

[0007]

An erasing device according to the present invention has the following configuration to achieve the above object. (A) The case body has a hollow case body, and an upper housing chamber and a lower housing chamber are formed by a partition wall inside the case body, and an opening is formed at a lower portion of the lower housing chamber. (B) At least a pair of erasing rollers is provided in the lower storage chamber so as to protrude from the opening. (C) The lower accommodating chamber is provided with a ridge for sliding contact with the erasing roller, and the ridge is formed with a flow groove provided with a powder suction port on the erasing roller side. (D) A dust collecting chamber having a filter therein is provided in the upper storage chamber, and the dust collecting chamber and the circulation groove are communicated with each other by a communication hole. (E) On one side of the dust collecting chamber, a suction device for sucking air in the dust collecting chamber and discharging the air to the outside of the dust collecting chamber in the upper storage chamber is provided. (F) The upper accommodation chamber is provided with at least one pair of the erasing rollers and one drive motor for driving the suction device. (G) The partition wall has a communication opening communicating the upper storage chamber and the lower storage chamber outside the powder collection chamber. (H) The upper part of the upper storage chamber is closed by an upper cover member, the upper cover member is provided with an opening communicating with the dust collecting chamber, and further provided with a lid member for opening and closing this opening. That

[0008]

Since the erasing device according to the present invention has the above-mentioned structure, when one drive motor is driven, the suction device operates to discharge the air in the dust collecting chamber to the outside, and at the same time, the erasing roller in the lower housing chamber is driven. Rotate. Since the air in the dust collecting chamber is sucked, the air is sucked from the dust absorbing port formed in the ridge through the communication hole and the communication groove communicating with the dust collecting chamber.

When the rotating erasing roller is rubbed against a blackboard or a white board, the characters and the like written on the erasing roller are erased. Powder such as white powder and black powder generated by erasing characters and the like adheres to the erasing roller. Since the erasing roller is in sliding contact with the ridge, the powder attached to the erasing roller is wiped off by the ridge. The floured-off powder is sucked as described above from the powder suction port formed on the ridge, and is collected in the dust collecting chamber via the circulation groove and the communication hole. Since a filter is provided in the powder collecting chamber, the powder is absorbed by the filter. The powder not absorbed by the filter is discharged into the upper storage chamber outside the powder collection chamber by the suction device. The discharged powder is sent into the lower storage chamber through the communication opening, and adheres to the erasing roller in the lower storage chamber. The powder adhering to the erasing roller is sucked into the dust collecting chamber again as described above. In this way, the powder circulates in the case body and does not leak out of the case body until it is sucked into the filter in the dust collecting chamber. The filter can be opened by opening the lid member provided on the upper cover member of the upper storage chamber, taken out of the opening, and replaced with a new one.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an external configuration of the erasing device 1. FIG. 2 is an exploded perspective view showing the internal configuration of the erasing device 1. FIG. 3 is a side view of the erasing device 1. FIG.
3 is a front view of the erasing device 1. FIG. FIG. 5 is a cross-sectional view of FIG.
FIG. 4 is a partially omitted cross-sectional view cut along a line. FIG.
FIG. 4 is a partially omitted cross-sectional view cut along the line WW of FIG. 3. FIG. 7 is a sectional view cut along the line YY of FIG. FIG. 8 is a sectional view cut along the line ZZ of FIG. FIG. 9 shows a horizontal cover member 93 of the erasing device 1.
FIG. FIG. 10 is a plan view of the erasing apparatus 1 with the upper cover member 16 removed. FIG. 11 is a bottom view of the erasing device 1.

As shown in FIGS. 1 and 2, the erasing apparatus 1 includes a case body 2, erasing rollers 42 and 45 provided in the case body 2, and a drive motor 76 for driving the erasing rollers 42 and 45. Have. The case body 2 includes a housing member 3 and an upper cover member 16 that covers an upper open portion of the housing member 3.
And a lateral cover member 93 that covers the side portion. The housing member 3 is integrally formed and has front and rear walls 5 and 6 having upper portions formed in a semicircular shape, and left and right walls 7 and 9 formed at lower portions on both sides of the front and rear walls 5 and 6. And a partition wall 10 for vertically dividing the inside of the housing member 3.

On the inner side of the semicircular peripheral edge of the front and rear walls 5 and 6,
As shown in FIG. 2, engagement step portions 11 and 12 are formed,
Fitting grooves 13 and 15 are formed at the upper end portions of the left and right walls 7 and 9. The front and rear ends of an upper cover member 16 formed in a semicircular shape are engaged with the engagement step portions 11 and 12. In addition, fitting protrusions 17 and 19 formed on the left and right ends of the upper cover member 16 are inserted into the fitting grooves 13 and 15. The upper cover member 16 is attached to the housing member 3 as described above, and is fixed by screws 20 as shown in FIG. The upper cover member 16 fixed in this way and the partition wall 10, the front wall 5, the rear wall 6, the left wall 7,
An upper accommodation room 21 is formed by the right wall 9. The left wall 7 and the upper cover member 16 have notches 2
2 and 23 are formed, and a switch 24 is attached to the notches 22 and 23.

The front wall 5 and the rear wall 6 are, as shown in FIG.
Openings 25 and 26 are formed by cutting out the lower part in a substantially U-shape. The guide grooves 2 are provided on the periphery of the openings 25 and 26.
7, 29 are formed. The guide projections 32, 33 of the bearing plates 30, 31 are detachably inserted into the guide grooves 27, 29, and the bearing plates 30, 31 are detachably attached to the openings 25, 26. The bearing plates 30, 31, front and rear walls 5, 6, and left and right walls 7, 9
And the partition wall 10 to form a lower storage chamber 50 in which an opening 51 is formed in the lower part.

The bearing plates 30, 31 are provided with a pair of bearing holes 35, 36, 37, 39, and the bearing holes 4 are provided between the pair of bearing holes 35, 36 and between the pair of bearing holes 37, 39.
0, 41 are provided (see FIGS. 4, 7, 9). The rotating shaft 43 of the erasing roller 42 is rotatably mounted in the bearing hole 35 of the one bearing plate 30 and the bearing hole 37 of the other bearing plate 31 opposed thereto. Similarly, a rotating shaft 46 of an erasing roller 45 is rotatably mounted in the bearing hole 36 of one bearing plate 30 and the bearing hole 39 of the other bearing plate 31 opposed thereto. The erasing rollers 42 and 45 are provided in the lower storage chamber 50 such that the lower portions protrude from the openings 51.

The erasing rollers 42 and 45 are formed of a cylindrical urethane foam. However, a brushed cloth, for example, a cloth with electrostatic flocking, a corten, a velvet wound around a circular elastic core material, or the like can be used. Any material can be used as long as it can wipe off characters written on the surface of the blackboard or white board.

Further, the bearing hole 4 of one bearing plate 30
As shown in FIG. 7, a rotating shaft 49 of an intermediate roller 47 is rotatably attached to the bearing hole 41 of the other bearing plate 31 opposite to 0. This intermediate roller 47
Is provided near the erasing rollers 42 and 45 so as not to hinder the rotation of the erasing rollers 42 and 45, as shown in FIG.

The rotating shafts 43, 46 protrude from the other bearing plate 31, and the protruding portions are provided with drive gears 100, 101 and pulleys 102, 103 outside the drive gears, as shown in FIGS. Is fixed. A pair of spur gears 105 and 106, which are rotatably mounted on the bearing plate 31 by a support shaft (not shown) and always mesh with each other, are provided between the drive gears 100 and 101. One spur gear 105 meshes with the drive gear 100, and the other spur gear 106 meshes with the drive gear 101. Therefore, the driving gears 100 and 101
Are configured to rotate at the same time so that the rotation directions are opposite.

The lower surface of the partition 10 is shown in FIGS.
As shown in FIG.
2, 53 are provided. In these ridges 52 and 53,
The flow grooves 55 and 56 are formed in the longitudinal direction, and the opening formed at the lower part of the flow grooves 55 and 56 is
7, 59 so as to face the erasing rollers 42, 45. On the upper surface of the partition wall 10, there is provided a dust collecting chamber 66 surrounded by first and second intermediate walls 61 and 62 and upper side walls 63 and 65 each having an upper part formed in a semicircular shape. The upper opening portion of the dust collecting chamber 66 is
As shown in FIG. 5 and FIG. 7, the cover member 67 is integrally formed on the back surface of the cover. A fiber filter 69 is provided in the powder collecting chamber 66. As shown in FIGS. 8 and 10, communication holes 70 and 71 for communicating the flow grooves 55 and 56 with the inside of the dust collecting chamber 66 are formed on the lower surface of the dust collecting chamber 66, that is, on the partition wall 10.

As shown in FIGS. 2 and 7, a cylindrical fan cover 72 is fixed to the first intermediate wall 61. A motor mounting ring 73 concentric with the fan cover 72 is provided by a mounting piece 75. One side of the drive motor 76 is attached to the motor attachment ring 73. One drive shaft 77 of the drive motor 76 is provided with a suction fan 79 located inside the fan cover 72. The suction fan 79 includes a side plate 81 having a boss 80 attached to the drive shaft 77, a side plate 83 having a suction port 82, and a plurality of blades 85 provided between the side plates 81, 83. Have been. A guide ring 86 protrudes around the suction port 82 of the side plate 83, and the guide ring 86 is rotatably inserted into an opening 87 formed in the first intermediate wall 61. The drive motor 76 and the suction fan 79 constitute a suction device that sucks air in the dust collecting chamber 66 and discharges the air into the upper storage chamber 21. Drive motor 7
A communication opening 88 that communicates the upper storage chamber 21 and the lower storage chamber 50 is provided in the partition wall 10 located below 6 (see FIG. 6).

The other side of the drive motor 76 has a gear case 8
9 is provided, and the other end of the gear case 89 is fixed to the rear wall 6. In the gear case 89, a reduction gear group for reducing the rotation of the other drive shaft of the drive motor 76 is provided (not shown). As shown in FIGS. 7 and 9, the final shaft 90 of the reduction gear group projects outward from the rear wall 6, and a driving pulley 91 is provided at the projecting portion.
The driving pulley 91 and the above-described pulley 102 are connected by a rubber belt 92, and the power of the driving pulley 91 is transmitted to the pulley 102 via the rubber belt 92.

The driving pulley 91, pulleys 102, 10
A horizontal cover member 93 surrounding 3 and the like is provided on the rear wall 6 (see FIGS. 1 and 7). That is, the horizontal cover member 93 is attached to the rear wall 6.
The main wall 95 has the same shape as that of the main wall 95, a side wall 96 provided on the periphery except the lower edge of the main wall 95, and a fitting protrusion 97 protruding below the side wall 96. The horizontal cover member 93 is attached to the rear wall 6 so that the fitting projection 97 is inserted into a stepped recess 98 formed on both lower side edges of the rear wall 6 and stopped by screws 99. .

In the space formed between the second intermediate wall 62 and the front wall 5, as shown in FIG.
0 is provided. This charging battery 110 is connected to the front wall 5.
Output terminal (not shown) of an adapter connected to a connector 111 provided at the top of the power supply and connected to a household power supply
Is charged by inserting it into the connector 111. The charging battery 110, the drive motor 76 and the switch 24 are electrically connected, and the switch 24 is turned on.
The drive motor 76 is driven / stopped by being turned off.

Since the erasing apparatus 1 according to the above embodiment has the above configuration, it can be used as follows. When the switch 24 is turned on, the drive motor 76 rotates,
The final shaft 90 rotates via the drive shaft 77 and the reduction gear group. The suction fan 79 provided on the drive shaft 77 rotates, and as shown in FIG.
The air inside is sucked in and discharged into the upper housing chamber 21 outside the dust collecting chamber 66 through the fan cover 72. Dust collection room 66
As shown in FIG. 8, the communication holes 70 and 71 communicating with the inside of the
Powder absorbing port 5 formed in ridges 52, 53 through 5, 56
Air is sucked from 7,59.

The driving pulley 91 provided on the final shaft 90 rotates, and as shown in FIG.
02, the erasing roller 42 is rotated in the direction A of FIG. The rotation of the rotating shaft 43 is controlled by the drive gear 1.
The rotation is transmitted to the rotation shaft 46 via the spur gear 105, the spur gear 106, and the drive gear 101 to rotate the erasing roller 45 in the B direction.

The case body 2 is gripped, and the rotating erasing rollers 42 and 45 are pressed against the blackboard or the white plate and slid on the blackboard or the white plate to erase characters and the like written on the blackboard or the white plate. Erasing roller 4
2 and 45 rotate in opposite directions to each other, so that even if the case body 2 is pressed against a blackboard or a white plate, the erasing rollers 42 and 4 are rotated.
It does not move on its own due to the rotation of 5.

Powder such as chalk white powder generated by erasing characters and the like on a blackboard and black powder generated by erasing characters and the like on a white plate adhere to the surfaces of the erasing rollers 42 and 45. Since the erasing rollers 42 and 45 are in sliding contact with the ridges 52 and 53, powder adhering to these ridges 52 and 53 is removed.
(See FIG. 5). The floured off powder is immediately transferred to the suction port 5 formed in the ridges 52, 53.
It is sucked from 7, 59 as described above.

The powder sucked through the powder sucking ports 57 and 59
As shown in FIG. 8, the powder in the flow grooves 55 and 56 passes through the communication ports 70 and 71 to the dust collecting chamber 66 in the upper storage chamber 21.
It is sucked in. Since the filter 69 is provided in the dust collecting chamber 66, the powder is absorbed by the filter 69.

The powder not absorbed by the filter 69 is sucked through the suction port 82 of the suction fan 79 and discharged into the upper housing chamber 21 through the fan cover 72 as shown in FIG. The discharged powder is sent into the lower storage chamber 50 through the communication opening 88 and is again
It adheres to the surfaces of 2, 45 (see FIG. 6). The powder adhering to the surfaces of the erasing rollers 42 and 45 is wiped off by the ridges 52 and 53 before coming into contact with the erasing surfaces of the black and white plates, sucked into the dust collecting chamber 66 as described above, and absorbed by the filter 69. Is done. As described above, the powder generated by the erasing rollers 42 and 45 circulates in the upper housing chamber 21 and the lower housing chamber 50 until it is absorbed by the filter 69, and the case body 2
It does not leak outside.

In the above embodiment, in order to replace the filter 69, the screw 20 is removed and the upper cover member 16 is attached to the housing member 3.
Must be removed from the However, as shown in FIG. 12, an opening 120 through which the filter 69 can be inserted and removed is formed at a position above the filter 69 of the upper cover member 16, and a cover member 121 is provided in the opening 120 so as to be openable and closable. The member 69 can be easily replaced without removing the member 16. Note that this lid member 121
Is hinged on one side to the upper cover member 16,
An operation piece 123 having a locking claw 122 is provided on the other side. The locking claw 122 is locked by the elasticity of the material to the edge of a locking recess 124 formed on the other side of the opening 120.

In the above embodiment, the erasing rollers 42, 4
An intermediate roller 47 is provided to close the gap between the casings 5 and prevent the powder from falling out of the case body 2 from the gap. However, as shown in FIG. 13, a substantially triangular bottom wall 126 may be provided between the bearing plates 30, 31 instead of the intermediate roller 47. In this way, the powder dropped from the communication opening 88 is distributed right and left by the apex of the bottom wall 126, falls along the inclined surface, and adheres to the left and right erase rollers 42 and 45.

Also, the ridges 5 forming the flow grooves 55, 56
The two side walls 52a, 52b, 53a, 53b
Since both slidably contact the erasing rollers 42 and 45, the inner side walls 52b and 53b first slidably contact the erasing rollers 42 and 45 rotating in the direction of the arrow from the inside to the outside, and the powder is stored in the lower storage chamber. May be dropped inside 50. Therefore, as shown in FIG. 13, when the side walls 52b and 53b provided on the inside are shortened, only the side walls 52a and 53a provided on the outside are in sliding contact with the erasing rollers 42 and 45 to wipe off the powder. Since the powder suction ports 57 and 59 are provided immediately above the powder, the powder is sucked in at the same time as the powder is removed, and the powder suction efficiency can be increased.

In the above embodiment, the rotation of the drive shaft (not shown) of the drive motor 76 is transmitted to the final shaft 90 via the reduction gear group in the gear case 89. However, the gear case 89 is used as the drive motor. Alternatively, the final shaft 90 can be used as the drive shaft of the drive motor. In this case, it is needless to say that this drive motor also needs to be electrically connected to the switch 24 and the battery 110 for charging.

Further, in the above embodiment, the driving pulley 91
And the pulley 102 are connected by the rubber belt 92, but the drive pulley 91 and the pulley 103 can also be connected by the rubber belt 92. In this case, the erasing roller 42 rotates in the anti-A direction, and the erasing roller 45 rotates in the anti-B direction.

The power transmission means of the final shaft 90 and the rotating shaft 43 or 46 is not limited to the above embodiment.
That is, the rotation of the final shaft 90 corresponds to the rotation shaft 4 of the erase roller 42.
3 and the rotation shaft 46 of the erasing roller 45, various combinations are conceivable. For example, two drive pulleys 91 are provided side by side, one drive pulley 91 and pulley 102 are connected by a rubber belt 92, and the other drive pulley 9
1 and the pulley 103 are connected to each other by crossing the rubber belt 92, even if the spur gears 105 and 106 are not provided.
2, 45 can be rotated simultaneously. The same is true even if the spur gears 105 and 106 are removed and a rubber belt is connected between the pulleys 102 and 103 by crossing. Conversely, the final shaft 90 and the rotating shaft 43 and the final shaft 90 and the rotating shaft 4
6 or the final shaft 90 and the rotating shaft 43, and the rotating shaft 43 and the rotating shaft 46 may be connected by a plurality of gears.

[0035]

The erasing device according to the present invention erases characters and the like written on a blackboard, a white board, etc., so that the powder adhering to the erasing roller is sucked off almost at the same time as the powder is wiped off and absorbed by the filter. Therefore, there is an effect that the powder absorption efficiency can be increased. In addition, the powder that has not been absorbed by the filter circulates in the case body until it is absorbed by the filter, so that there is an effect that it does not leak to the outside and does not accumulate in one place. In addition, since there is no need to separately provide a means for removing powder adhering to the erasing roller and can be integrally formed in the lower storage chamber, the structure is simple, the assembly is easy, and the manufacturing cost can be reduced. There is. Since the erasing device according to the present invention drives at least a pair of erasing rollers and a suction device with one drive motor, it can be manufactured at low cost, consumes less power, and can be reduced in size and weight. There is also an effect. Further, an opening communicating with the dust collecting chamber is formed in the upper cover member of the upper storage chamber, and a lid member for opening and closing this opening is provided. This has the effect that it can be easily replaced with a new one.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an external configuration of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an internal configuration of the embodiment.

FIG. 3 is a side view of the one embodiment.

FIG. 4 is a front view of the embodiment.

FIG. 5 is a partially omitted cross-sectional view cut along the line XX of FIG. 3;

6 is a partially omitted cross-sectional view cut along the line WW of FIG. 3;

FIG. 7 is a sectional view cut along the line YY of FIG. 4;

FIG. 8 is a sectional view cut along the line ZZ in FIG. 4;

FIG. 9 is a rear view of the embodiment with the horizontal cover member removed.

FIG. 10 is a plan view of the above-described embodiment with an upper cover member removed.

FIG. 11 is a bottom view of the one embodiment.

FIG. 12 is a perspective view showing an upper cover member of another embodiment.

FIG. 13 is a sectional view showing another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 erasing device 2 case body 3 housing member 10 partition wall 16 upper cover member 21 upper housing chamber 30 bearing plate 31 bearing plate 42 erasing roller 43 rotating shaft 45 erasing roller 46 rotating shaft 50 lower housing chamber 51 opening 52 ridge 53 ridge 55 flow groove 56 flow groove 57 dust suction port 59 dust suction port 66 dust collection chamber 69 filter 70 communication hole 71 communication hole 76 drive motor 79 suction fan 88 communication opening 89 gear case 90 final shaft 91 drive pulley 92 rubber belt 100 drive gear DESCRIPTION OF SYMBOLS 101 Drive gear 102 Pulley 103 Pulley 105 Spur gear 106 Spur gear

Claims (1)

(57) [Claims] 1. An erasing device having the following requirements. (A) The case body has a hollow case body, and an upper housing chamber and a lower housing chamber are formed by a partition wall inside the case body, and an opening is formed at a lower portion of the lower housing chamber. (B) At least a pair of erasing rollers is provided in the lower storage chamber so as to protrude from the opening. (C) The lower accommodating chamber is provided with a ridge for sliding contact with the erasing roller, and the ridge is formed with a flow groove provided with a powder suction port on the erasing roller side. (D) A dust collecting chamber having a filter therein is provided in the upper storage chamber, and the dust collecting chamber and the circulation groove are communicated with each other by a communication hole. (E) On one side of the dust collecting chamber, a suction device for sucking air in the dust collecting chamber and discharging the air to the outside of the dust collecting chamber in the upper storage chamber is provided. (F) The upper accommodation chamber is provided with at least one pair of the erasing rollers and one drive motor for driving the suction device. (G) The partition wall has a communication opening communicating the upper storage chamber and the lower storage chamber outside the powder collection chamber. (H) The upper part of the upper storage chamber is closed by an upper cover member, the upper cover member is provided with an opening communicating with the dust collecting chamber, and further provided with a lid member for opening and closing this opening. That