JP4072079B2 - Board eraser - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a board eraser that can be suitably applied to a whiteboard or the like.
[0002]
[Prior art]
A blackboard or whiteboard used in offices, schools, etc. has conventionally been used with a board eraser for erasing written marks by chalk and markers.
[0003]
For this type of eraser, for both blackboard and whiteboard, as shown in Patent Document 1, for example, a wiped fabric is not easily peeled around a backup member such as a sponge and does not become loose. It is customary to sew and wrap the exterior firmly and fix the handle to this.
[0004]
[Patent Document 1]
Registered Utility Model No. 2593016 Gazette
[Problems to be solved by the invention]
However, in such a case, since the wiping area of the stretch fabric is always determined, the wiping function tends to be deteriorated. In such a case, it is possible to regenerate to some extent by flaking the attached powder if it is a chalk, but since the marker absorbs ink, there is no choice but to wash it off for reproduction. The situation is the same when the adhesion of powder becomes steady even with chalk.
[0006]
However, in the conventional eraser, since the tension fabric is integrated with a backup member such as a sponge, in order to wash the tension fabric with water, the sponge itself must be exposed to water. For this reason, since it is hard to dry, it takes time until it can be reused, and since it is difficult to recycle it during daily use, there is a situation that the wiping function is inevitably lowered.
[0007]
The present invention has been made paying attention to such problems, and it is an object of the present invention to provide a new and useful board eraser capable of effectively maintaining the wiping function with a simple structure and management. It is said.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the present invention employs the following configuration.
[0009]
That is, the board eraser of the present invention stretches a stretched fabric between the backup member and the hold member. The stretcher is wound around at least the backup surface of the backup member and is backed up on the backup surface. The extra length portion is sandwiched between the backup member and the hold member while applying tension to the wiping portion. And it is constituted so that the part which was the extra length part of the tension ground can be used as a wiping part by changing the sandwiching position in the feeding direction, and the inner cover is detachably attached to the backup member The upper lid functioning as a handle is attached to the backup member in a detachable manner so as to have the inner lid between the backup member and the inner lid functions as the hold member. It is characterized by that.
[0010]
In this case, even if the wiping function of the wiping portion of the upholstery is reduced to a level that requires regeneration, it is not necessary to immediately wash with water as long as there is a surplus portion that can be fed out. The long part can continue to be used as a new wiping part. In addition, the use of the eraser can be continued if a spare place is prepared during washing with water. Therefore, according to the present invention, it is possible to effectively extend the period of continuous use as compared with the conventional case, and it is possible to reliably reduce the frequency of washing with water.
[0011]
As an effective configuration for stretching the wiping part, a part of the holding member is inserted into a part of the backup member, and the extra length part of the tensioning cloth is dragged when inserting the wiping part. The thing which is trying to add tension is mentioned.
[0012]
As a concrete embodiment of the tension fabric, the endless shape that can be detachably attached to the position around the outer periphery of the backup member, or the extra length portion can be attached to the anti-backup surface side of the backup member. Examples thereof include an end shape that is wound and loosened.
[0013]
As the hold member, an inner lid attached to the backup member can be used. For this, together with detachably attaching the inner cover to the backup member, combined relates a top cover which serves as a handle to this inner lid to the back-up member so as to have an inner between the backup member is detachable The inner lid may be attached and function as the holding member.
[0015]
In order to effectively increase the added value of this board eraser, it is used together with the eraser equipment or the eraser in the space between the upper lid and the inner lid or in the space between the inner lid and the backup member. It is preferable to provide a storage unit for storing the writing instrument or its equipment.
[0016]
In particular, these storage units employ a structure that can store the replacement fabric that is the eraser's equipment, and a structure that can store the marker or the ink and / or the pen that is the writing instrument used with the eraser. It is effective to keep it.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
The board eraser of this embodiment is used as a wiping tool for a whiteboard. As shown in FIGS. 1 and 2, the lower case 1 that functions as a backup member and the middle case that functions as a hold member 2. An upper case 3 serving as an upper lid, and a tension fabric 4 are provided, and the tension fabric 4 is stretched between the lower case 1 and the middle case 2 in the assembled state. At that time, the upholstery 4 is wound around at least the backup surface 1a of the lower case 1, and the extra length portion 4y is placed in the lower case 1 while the tension is applied to the wiping portion 4x backed up on the backup surface 1a. While being pinched | interposed between cases 2, it is comprised so that the site | part which was the extra length part 4y of the tension | tensile_strength place 4 can be newly delivered as the wiping off part 4x by changing the pinching position.
[0019]
Specifically, as shown in FIGS. 1, 2, 3 (c), 4 (c), and 5 (c), the lower case 1 includes a pair of side edges 11a positioned in the width direction and A pair of end edges 11b positioned in the longitudinal direction and a constricted portion 11ax is formed in the central portion of the side edge 11a, and two locations displaced from the constricted portion 11ax in the longitudinal direction (exactly from the longitudinal center to the edge) A bottom wall 11 formed with a bulging portion 11ay that bulges outward in the center portion of the region, and a pair of side edges 11a of the bottom wall 11 that stand up from the pair of side edges 11a and the bulging portion 11ax of the bottom wall 11 A side wall 12 formed with a constricted portion 12x and a bulging portion 12y at the corresponding position of the protruding portion 11ay, and a thin portion 13a that stands up from the pair of end edges 11b and near the upper edge of the outer surface and engages a part thereof And an end wall 13 formed with a hole 13b. A box shape. The bottom wall 11 of the lower case 1 is provided with two bottomed circular holes 11c on the center line passing through the center in the width direction and displaced from the center in the longitudinal direction. A magnet 11d is provided in the hole 11c. Wearing. A small-diameter hole 11c1 that opens into the inner space of the lower case 1 is opened in the hole 11c of the bottom wall 11 on which the magnet 11d is mounted. This is for removing the magnet 11d by striking it with a pointed tip in the direction indicated by the arrow f1 in FIG.
[0020]
As shown in FIGS. 1, 2, 3 (b), 4 (b), and 5 (b), the middle case 2 has a substantially similar shape that is slightly smaller than the bottom wall 11 of the lower case 1. From the bottom wall 21 having the constricted portion 21ax and the bulging portion 21ay at the corresponding positions of the constricted portion 11ax and the bulging portion 11ay of the lower case 1 at the side edge 21a, and a pair of side edges 21a of the bottom wall 21 The constricted portion 22x and the bulging portion can be disposed at positions that stand up and face the inner surface of the side wall 12 of the lower case 1 and correspond to the constricted portion 12x and the bulging portion 12y of the side wall 12 of the lower case 1, respectively. A box-like shape having a side wall 22 having 22y and an end wall 23 that stands up from a pair of end edges 21b of the bottom wall 21 and can be disposed on the inner surface of the end wall 13 of the lower case 1 and opens upward. Make. On the upper edge of the side wall 22, a flange 24 protrudes outward. The flange portion 24 also has a constricted portion 24x and a bulging portion 24y corresponding to the above on the outer edge. In the opening of the middle case 2, the first storage portion 5 and the second storage portion 6 are formed in one half of the longitudinal direction, and the third storage portion 7 is formed in the other half. . As shown in FIG. 3B, FIG. 4B, FIG. 5B, and FIG. 6, the first storage unit 5 includes an upright piece 25 that is erected from the bottom wall 21 in the vicinity of the center in the longitudinal direction. A cylindrical ink case 51 can be detachably mounted between the upright piece 26 raised from the bottom wall 21 in the vicinity of the direction edge. An annular groove 51 a is formed around the center of the end surface of the ink case 51, and protrusions 25 a and 26 a are formed on the facing surfaces of the standing pieces 25 and 26, and are provided on the bottom wall 21 of the middle case 2. At the height position where the ink case 51 is placed on the rib 27, the protrusions 25a and 26a are engaged with the lowest portion of the annular groove 51a. In addition, the second storage portion 6 is provided at a position higher than the bottom wall 21 on the side of the end wall 23 closest to the upright piece 26 that forms the first storage portion 5. A vertical hole 28a is formed in the upward surface 28, and a marker pen point 61 is detachably mounted in the vertical hole 28a. Further, the third storage portion 7 is a space formed by being surrounded by the standing piece 25, an end wall 23 opposite to the end wall 23 on the second storage portion 6 side, and a pair of side walls 22. The replacement 71 of the upholstery 4 is stored in this part.
[0021]
As shown in FIGS. 1, 2, 3 (a), 4 (a), and 5 (a), the upper case 3 has a substantially similar shape slightly larger than the bottom wall 11 of the lower case 1. From the top wall 31 having the constricted portion 31ax and the bulging portion 31ay at the corresponding positions of the constricted portion 11ax and the bulging portion 11ay of the lower case 1 at the side edge 31a, and the pair of side edges 31 of the top wall 3 The constricted portion 32x and the bulging portion 32y can be disposed at positions that hang down and face the outer surface of the side wall 12 of the lower case 1 and correspond to the constricted portion 12x and the bulging portion 12y of the side wall 12 of the lower case 1, respectively. Can be disposed on the outer surface of the end wall 13 of the lower case 1 so as to be suspended from the pair of end edges 31b of the top wall 31 and provided on the end wall 13 of the lower case 1 in a predetermined assembled state. The engaging claw 33 is located at the corresponding position of the engaged hole 13b. ; And a end wall 33 having a form of open box-shaped downward. The top wall 31 of the upper case 3 has a constant region 3m near the center in the longitudinal direction parallel to the bottom wall 11 of the lower case 1, and part of the regions 3n on both sides from the region 3m toward the edge 31b for a while. It is inclined in a direction approaching the bottom wall 11 of the lower case 1. On the lower surface of the top wall 31 of the upper case 3, ribs 31s for pressing the middle case 2 toward the lower case 1 are provided so as to protrude downward, and the vicinity of the edge 31b of the top wall 31 is provided. A rib 31t (see FIG. 4 (a)) having a tapered surface 31t1 that inclines in a direction away from the inner surface of the end wall 33 as it hangs down is provided at a portion extending from the end wall 33 to the end wall 33. The wedge-shaped gap formed between the rib 31t and the end wall 33 is a dimensional relationship for receiving the upper part (particularly the engaging claw 13b part) from the thin part 13a of the end wall 13 of the lower case 1 in a predetermined assembled state. It is in. In addition, a hanging portion 32z that hangs down downward is formed around the constricted portion 32x of the pair of side walls 32 of the upper case 3.
[0022]
Then, the middle case 2 is dropped and mounted from above into the opening of the lower case 1, and the assembly is completed by partially covering the upper case 3 on the outside of the lower case 1 with the middle case 2 inside. I am doing so. Specifically, in the predetermined assembly state shown in FIGS. 4D and 5D, the bottom wall 21 of the middle case 2 is in contact with or close to the bottom wall 11 of the lower case 1 and the side wall of the lower case 1. 12 is brought into contact with the upper edge of the side wall 22 of the middle case 2, and ribs 31 s provided on the lower surface of the top wall 31 of the upper case 3 are in contact with the upper surface of the collar 24 of the middle case 2. The engaging claw 33b provided at the corresponding position of the end wall 33 of the upper case 3 is engaged with the engaging hole 13b provided in the vicinity of the upper edge of the end wall 13 of the lower case 1 in contact therewith. In this state, the upper case 3 is provided with a notch 33 a in the end wall 33 for exposing the thin portion 13 a of the end wall 13 of the lower case 1.
[0023]
The upholstery 4 is a fabric member that circulates in a cylindrical shape and sews its edges together, and is positioned at a position that circulates around the outer periphery (the bottom wall 21, the side wall 22, and the flange 24) of the middle case 2. It is designed to be detachably mounted from the longitudinal direction. In the attached state, the upholstery 4 is at least set to a dimension that allows the extra length portion 4y to be sufficiently slackened in the opening of the middle case 2. Then, the lower case 1, the middle case 2 and the upper case 3 are assembled in a state where the tensioned ground 4 is attached to the middle case 2, so that when the middle case 2 is dropped into the opening of the lower case 1, The direction in which the extra length portion 4y of the ground 4 is pushed by the bottom wall 21 and the side wall 22 of the middle case 2 and the both sides of the wiping portions 4x of the tensioned fabric 4 located on the lower surface side of the bottom wall 11 of the lower case 1 are pulled upward. By dragging the upholstery 4, a tension is applied to the portion of the upholstery 4 that is located on the backup surface 1 a of the bottom wall 11 of the lower case 1 and becomes the wiping portion 4 x, and finally the surplus of the upholstery 4 is obtained. The long portion 4y is sandwiched between the flange 24 of the middle case 2 and the upper edge of the side wall 12 of the lower case 1, or between the lower surface of the bottom wall 21 of the middle case 2 and the upper surface of the bottom wall 11 of the lower case 1. I am doing so. In this state, the tension fabric 4 is considered to be in a state in which the same tension is applied over almost the entire circumference, but the circumference dimension of the tension fabric 4 is actually set to a value at which the tension at this time is appropriate. .
[0024]
Then, by changing the sandwiching position, a portion or the like located in the opening of the middle case 2 that was the extra length portion 4y of the stretch 4 is newly used as a wiping portion 4x to back up the bottom wall 11 of the lower case 1. It can be extended to the surface 1a side.
[0025]
That is, when the extracted portion 4x is soiled, the upper case 3 is removed from the lower case 1, the middle case 2 is taken out, and the upholstery 4 is moved in the circumferential direction as shown by an arrow I in FIG. The dirty part is moved into the opening of the middle case 2 and the unused part is newly wiped out as a portion 4x to the backup surface 1a side of the bottom wall 11 of the lower case 1, and the middle case 2 is attached to the lower case 1 again. Then, by attaching the upper case 3 to the lower case 1, it can be continuously used.
[0026]
As described above, the eraser according to the present embodiment has the extra length portion 4y that can be fed out in an unused state even if the wiping function of the wiping portion 4x of the upholstery 4 is reduced to a level that requires regeneration. There is no need to immediately wash with water, and the extra length portion 4y can be continuously used as a new wiping portion 4x. In addition, the use of the eraser can be continued by preparing a replacement stretch 71 during washing with water. Therefore, according to the present embodiment, it is possible to effectively extend the period during which continuous use is possible compared to the conventional case, and the frequency of washing with water is also reliably reduced, so that the ease of use as this type of eraser is greatly improved compared to the conventional case. It becomes possible to make it.
[0027]
In addition, since a part of the middle case 2 is configured to be inserted into the opening of the lower case 1 and a tension is applied to the wiping portion 4x by dragging the extra length portion 4y of the stretch 4 when inserting. The tension can be reliably applied to the upholstery 4 with a simple operation.
[0028]
In particular, since the upholstery 4 has an endless shape that is detachably attached to a position that circulates around the outer periphery of the middle case 2, even if the operation is performed randomly as long as it is set to a predetermined circumferential dimension. A constant tension can always be obtained in the wiping portion 4x, and the reliability of the assembled state can be expected.
[0029]
Further, the board eraser is detachably attached to the lower case 1 and provided with the middle case 2 for providing the storage portions 5, 6, and 7, and the middle case 2 is provided between the lower case 1 and the middle case 2. The upper case 3 that functions as a handle is attached to the lower case 1 in a detachable manner, and the middle case 2 is effectively functioning as a holding member of the present invention, so that a useless structure is obtained. Thus, it is possible to effectively realize the tensioning 4 without taking in.
[0030]
In addition, storage units 5, 6, and 7 are provided in a space between the upper case 3 and the middle case 2, and an ink case 51 that is a writing instrument marker used together with the eraser is stored in the storage unit 5. Since the pen point 61, which is also a marker fixture, is stored in the section 6, and the replacement tension material 4, which is the eraser fixture, is stored in the storage section 7, these spare fixtures are placed on a whiteboard tray or the like. It is possible to effectively contribute to improving the appearance and preventing loss. Of course, such a storage portion may be configured by providing a space between the middle case 2 and the lower case 1.
[0031]
In addition to the above, the eraser of this embodiment has a structure that allows easy attachment and detachment of the upholstery 4 and a structure that is easy to use.
[0032]
First, as shown in FIG. 4D and the like, the end wall 13 of the lower case 1 is provided with a thin portion 13a and an engagement hole 13b, and the engagement provided on the end wall 33 when the upper case 3 is covered. The claw 33b is engaged with the engagement hole 13b, and the upper edge side of the end wall 13 of the lower case 1 enters a wedge-shaped gap formed by the tapered surface 31t1 provided on the rib 31t of the upper case 3. It can be assembled with. For this reason, as shown by f2 in the figure, when the thin portion 13a of the end wall 13 of the lower case 1 is pressed (it is not always necessary to press both end walls 13 simultaneously), the end wall 13 bends inward, and at this time As a result of the upper edge side of the wall 13 being pressed against the tapered surface 31t, the rib 31t escapes upward and the upper case 3 releases the engagement between the engagement claw 33b and the engagement hole 13b and is easy to remove.
[0033]
Further, since the upper case 1 is made of resin, when the bulging portion 32y of the side wall 32 is picked from both sides as shown by an arrow f4 in FIG. 3A, it is shown by an arrow f5 in FIG. 4D. Thus, the end wall 33 bends and the end wall 13 of the lower case 1 tends to escape, so that the engagement state between the engagement claw 33b of the upper case 3 and the engagement hole 13b of the lower case 1 is also released. It is easy.
[0034]
Further, this eraser is used by gripping the constricted portion 32x of the side wall 32 of the upper case 3 so as to be able to secure a stable and reliable gripping state. Since the drooping portion 32z extending further downward is provided, it is possible to secure a large grip margin and to stabilize it, and at the same time, it is possible to effectively avoid the inconvenience that the finger touches the stretch 4 and gets dirty. Further, gripping the constricted portion 32x is also effective in that it is an escape to prevent a finger from being caught between the end members when the hand is moved to the end of the board, for example.
[0035]
In addition, the top wall 31 of the upper case 3 is provided with a region 3n that is inclined so as to approach the bottom wall 11 side for a while, continuing to the central region 3m parallel to the bottom wall 11 of the lower case 1. The grip of the hand can be used in a natural state along with the region 3n of the upper case 1 and the use state can be further stabilized.
[0036]
The specific configuration of each unit is not limited to the above-described embodiment.
[0037]
For example, in the above-described embodiment eraser, the storage portions 5, 6 and 7 are provided in the middle case 2. However, in an eraser having a relatively compact structure, only the storage portions 5 and 6 are provided in the middle case 2 as shown in FIG. It is also possible to provide this. In the figure, the other structures are almost the same as those of the above-described embodiment, and common portions are denoted by the same reference numerals and description thereof is omitted. The lower case 1, the upper case 3, and the upholstery 4 may be configured according to the above embodiment.
[0038]
In the above embodiment, the endless shape 4 is used for the upholstery 4, but as shown in FIG. 8, the extra length portion 104 y is attached to the upholstery 104 on the side opposite to the backup surface of the backup member 101 such as the lower case. You may employ | adopt the end-shaped thing wound up and let loose. In this way, although the operation for applying the tension cannot be performed as easily as the above embodiment, it is not necessary to sew in a cylindrical shape, so that a replacement tension fabric can be easily used as appropriate. Become.
[0040]
The configuration of each other part can be variously modified without departing from the gist of the present invention.
[0041]
【The invention's effect】
Since the present invention has the configuration described above, even if the wiping function of the wiping portion of the stretch fabric is lowered, it becomes possible to continue using the stretch fabric by paying out the extra length portion, and the period during which it can be used continuously Can be effectively extended compared to the conventional case, the frequency of washing with water can be reliably reduced, and the ease of use as this type of eraser can be greatly improved compared to the conventional case.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the embodiment.
FIG. 3 is an exploded plan view of the embodiment.
FIG. 4 is an exploded vertical sectional view of the same embodiment.
FIG. 5 is an exploded cross-sectional view of the same embodiment.
FIG. 6 is a partially enlarged sectional view of the embodiment.
FIG. 7 is a view showing another embodiment of the present invention.
FIG. 8 is a view showing still another embodiment of the present invention.
[Explanation of symbols]
1. Backup member (lower case)
1a ... backup surface 2 ... hold member (inner cover, inner case)
3 ... Upper lid (upper case)
4 ... Zhang 4x ... Wiping part 4y ... Extra length part 5, 6, 7 ... Storage part

Claims (8)

A tensioning material is stretched between the backup member and the holding member,
A tension fabric is wrapped around at least the backup surface of the backup member, and the excess length portion is sandwiched between the backup member and the hold member while applying tension to the wiping portion backed up on the backup surface. By changing the sandwiching position in the feeding direction, it is configured so that the part that was the extra length part of the upholstery can be used as a wiping part ,
An inner lid is detachably attached to the backup member, and an inner lid is provided between the backup member and an upper lid that functions as a handle is detachably associated with the backup member. The board eraser is characterized in that the inner lid functions as the holding member . 2. The board as claimed in claim 1, wherein a part of the holding member is inserted into a part of the backup member, and a tension is applied to the wiping portion by dragging the extra length portion of the tensioning fabric when inserting. Eraser. 3. The board eraser according to claim 1, wherein the upholstery is of an endless shape that is detachably attached to a position around the outer periphery of the backup member. 3. The board eraser according to claim 1, wherein the upholstery has an end shape in which the extra length portion is detachably wound and loosened on the side opposite to the backup surface of the backup member. A thin wall portion and an engagement hole are provided on the end wall of the backup member, and an engagement claw provided on the end wall is engaged with the engagement hole when the upper cover is covered. By assembling the upper edge of the wall into a wedge-shaped gap formed by the tapered surface provided on the rib of the upper lid, and pressing the thin wall portion of the end wall of the backup member, the end wall The upper edge side of the end wall is pressed against the tapered surface, and the rib escapes upward so that the engagement between the engagement claw and the engagement hole is released. Eraser for board. The space between the upper lid and the inner lid or the space between the inner lid and the backup member is provided with a storage section for storing the eraser equipment, the writing instrument used together with the eraser, or the equipment. The eraser for boards according to any one of 5 to 5. The board eraser according to claim 6, wherein the storage portion is for storing a replacement fabric that is a fixture of the eraser. The board eraser according to claim 6, wherein the storage section is for storing a marker as a writing instrument used with the eraser or ink as a fixture and / or a pen tip.

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