JPH038478Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a blackboard wiper for wiping off characters, figures, symbols, etc. drawn on a blackboard. However, in the present invention, the blackboard refers to all display devices that can be wiped off with a so-called moquette, including whiteboards and the like.

[Background of the invention] (See Figure 4) When wiping off characters, figures, symbols, dirt, etc. (hereinafter referred to as characters, etc.) written on the blackboard 1 with the blackboard wiper 2, for example, as shown by arrows a to g. When the blackboard wiper 2 is moved back and forth from side to side, dirt 3, such as chalk powder, etc., is swept up on each turning point.
3, 3... remain.

These problems have existed even on blackboards marked with chalk in the narrow sense, but they become especially noticeable when attempting to erase characters marked with markers on so-called whiteboards, which have recently been developed.

In order to eliminate the above problems, the inventors of the present invention
We devised the blackboard wiper shown in the figure. FIG. 5 is a schematic diagram for explaining the basic structure of an embodiment of the blackboard wiping device of the present invention. The blackboard wiper of this example has a moquette 5 attached to the center of an open case/handle 4, and adhesive rollers 6 disposed on both sides of the moquette 5.

The adhesive roller 6 described above is constructed using a known roller type cleaner for cleaning carpets and the like. This is a roller-shaped member made by winding a long paper ribbon coated with a relatively weak adhesive, and has perforations for peeling off approximately every turn.

In the above blackboard wiping example (Fig. 5), the reason why a pair of adhesive rollers 6 are arranged on both sides of the moquette 5 is that when the blackboard wiper is moved from side to side to wipe the blackboard, the left side of the wiped area is This design allows for efficient adsorption and removal of dirt remaining on the right side and on the right side. When implementing the present invention, the number of moquettes and the number of adhesive rollers can be set arbitrarily.

As a result of repeated practical tests on the blackboard wiper (Figure 5), which has the basic structure described above, the inventors of the present invention confirmed that it generally achieved the desired effect. In order to fully demonstrate its effectiveness, the following functions are required.

(a) The adhesive roller 6 is a consumable part. In particular, as an essential characteristic of its structure, as the paper ribbon is successively peeled off, the diameter D gradually decreases. Therefore, special measures are required so that even if the diameter D of the roller changes, it can be pressed uniformly against the blackboard with a constant force.

(b) As mentioned above, since the adhesive roller 6 is a consumable part, it lacks practicality unless it is easy to attach and detach. Ideally, it would be better to be able to attach and detach without using hand tools such as a screwdriver or pliers.

(c) Blackboard wipes are also used in elementary schools, so they must be lightweight and safe. The above-mentioned adhesive roller must be replaced safely and easily by children, and there must be no risk of cutting their fingertips while playing with it.

[Purpose of invention]

This idea was created in view of the above circumstances.
To provide a lightweight and safe blackboard wiper capable of removing dirt swept onto the blackboard surface by pressing an adhesive roller against the blackboard, making it easy to attach and detach the adhesive roller and replace it.

[Summary of the idea]

In order to achieve the above object, the blackboard wiper of the present invention fixes a moquette for wiping away characters, figures, symbols, etc. drawn on a blackboard to an open box-like member that also serves as a handle and a case. Along with this, there is a blackboard wiper equipped with a roller member having adhesive strength, and the roller member is a member made by providing an adhesive layer on one side of a long piece of paper and wrapping it around a roller shaft, and the above-mentioned handle The double-case accommodates a frame member that rotatably and removably supports the roller member, and is slidably fitted therein, and between the handle-case and the frame member,
A spring means is provided for biasing the frame member in a direction to push it out of the handle/case, and detachable engaging portions 4b, 7a _-1 are provided for locking the frame member to prevent it from slipping out from the handle/case. It is characterized in that it is provided on each of the handle/case and the frame member.

[Example of idea]

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is an explanatory diagram in which a partially enlarged view is added to a perspective view showing the configuration of a portion where the adhesive roller 6 is attached to the case/handle 4'. FIG. 2 is an explanatory diagram depicting a state in which the device is cut along a plane parallel to the blackboard in use. FIG. 3 is also a sectional view taken along a plane perpendicular to the blackboard.

The open case 4' is a member corresponding to the case 4 in FIG. 5, and serves as a handle for grasping when in use. Attach Mokettu 5 to the center.

As shown in FIG. 2, a pair of adhesive rollers 6 are rotatably supported on both sides of the moquette 5. 6a is a roller shaft.

As shown in FIG. 1, a U-shaped frame member 7 is constructed, and a roller shaft 6a is attached to two parallel surfaces 7a, 7a' of the frame member 7.
A slot 7b is provided which fits into the groove. Said slot 7b
is formed parallel to the U-shaped back surface.

The frame member 7 described above is configured to be fitted and housed in the case/handle 4'.

The roller shaft 6 is inserted into the slot 7b of this U-shaped frame member 7.
When a is inserted and fitted as shown by arrow A, its tips protrude from the two parallel surfaces 7a and 7a'. A groove 4a is formed on the inner surface of the case/handle 4' to fit into the protrusion of the roller shaft 6a by a horseshoe-shaped protrusion 4a _-1 that guides the frame member 7. It is slidably guided in the direction (perpendicular to the blackboard surface). An enlarged view of the back surface of the area B where the groove 4a is provided is shown in B'.

Reference numeral 4b denotes a hook for locking the housed frame member 7 from coming out, and includes a projection 7a _-1 and a projection 7a -1 ′ (7a in FIG. 1) provided on two parallel surfaces 7a and _7a ' of the frame member 7.
a _-1 ′ is hidden). In FIG. 2, the hook 4b and the protrusions 7a _-1 and 7a _-1 ' are omitted because they would be difficult to read.

In order to bias the frame member 7 in the direction of pushing it out from the case/handle 4', a coil spring 8 is compressed and interposed between both members. 4c and 7c are spring seats.

The blackboard wipe configured as above (Figures 1 to 3)
1, when the shaft 6a of the adhesive roller 6 is fitted into the slot 7b as shown by arrow A and further inserted into the slot 4a as shown by arrow C,
Since b and the groove 4a are perpendicular to each other, the shaft 6a is positioned relative to the frame member 7 and is rotatably and detachably supported. The adhesive roller 6 can move together with the frame member 7 in the vertical direction of the figure (perpendicular to the blackboard surface). The frame member 7 is prevented from coming off by a hook 4b, and is elastically supported by a spring 8 with projections 7a _-1 and 7a _-1 ' pressed against the hook 4b.

When the frame member 7 is fitted into the case/handle 4' as described above, the two parallel surfaces 7a, 7a' are elastically bent and easily snap-fitted onto the hook 4b. Also, it is easy to leave.

For the adhesive roller 6, a known cleaner for cleaning carpets and the like, as described with reference to FIG. 5 (schematic diagram), was used. This type of adhesive roller is convenient because when it becomes dirty with dust (such as chalk powder or marker residue), the surface paper can be peeled off to expose a new adhesive surface and restore the adhesive function. be.

The diameter of the adhesive roller decreases as it is peeled off, and as is clear from FIG. Regardless of the situation, it is always pressed uniformly against the blackboard surface E with almost constant pressure.

[Effect of idea]

As described in detail above, the blackboard wiper of the present invention is capable of adsorbing and removing dirt swept up on the blackboard surface by pressing the adhesive roller against the blackboard surface, and is lightweight and inexpensive due to its simple configuration. This makes it easy to restore the adhesive surface if it becomes soiled, and it is also safe as there is no risk of cutting your fingertips while playing with it.

[Brief explanation of drawings]

1 to 3 show an embodiment of the blackboard wiping device of the present invention, FIG. 1 is an explanatory diagram with an exploded perspective view and a partially enlarged view, and FIGS. 2 and 3 are sectional views, respectively. Figure 4 is an explanatory diagram of the malfunction of conventional blackboard wiping.
FIG. 5 is an explanatory diagram showing the basic structure of an embodiment of the blackboard wiping device of the present invention. 1...blackboards, 2...blackboard wiping, 3...dirt,
4, 4'...Case and handle, 4a...Groove, 4b...
...Hook, 4c...Spring seat, 5...Mocket, 6...Adhesive roller, 6a...Roller shaft, 7...
...U-shaped frame member, 7a, 7a'...2 parallel surfaces,
7a _-1 , 7a _-1 ′...protrusion, 7b...slot, 7c...
...Spring seat, 8...Coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A moquette for wiping out letters, figures, symbols, etc. drawn on a blackboard is fixed to an open box-like member that also serves as a handle and a case, and is placed side by side with the moquette,
A blackboard wiper equipped with a roller member having adhesive strength, the roller member is a long piece of paper coated with adhesive and wrapped around the roller shaft, and the handle/case 4' is , a frame member 7 rotatably and removably supporting the roller member is slidably fitted and housed, and the frame member is placed between the handle/case and the frame member. A spring means 8 is provided to bias the frame member in the direction of pushing it out of the case, and detachable engaging portions 4b and 7a _-1 that lock the frame member so that it does not escape from the handle and case are connected to the handle and the case. A blackboard wiper characterized by being provided for each member.