JP3915075B2 - Tape cutter - Google Patents

Description

  The present invention relates to a tape cutter.

Conventionally, a wide variety of desktop tape cutters have been devised and commercialized. Even an impressive example can't be helped, but it can be roughly divided into the following three types.
First, the tape can be exchanged from the side without removing the reel from the main body, or the tape is loaded on its side so that the axis of rotation is vertical, and the tape is twisted 90 degrees before the anchoring part This is something that has been devised in the tape mounting method and the reel supporting method, as seen in the above. And, it can be seen in the one that can provide 360 degree yaw rotation by providing a rotating plate at the bottom of the tape cutter, the one that has the function of a pen stand, and the one that jumps up the tip of the tape after cutting the tape and picks it up Those with additional functions. And it considers the safety in the blade edge seen in the thing which the blade part rotated and can be accommodated, and the thing provided with the cover.

There is a tape cutter in which a straight blade is attached to a blade instead of a general saw blade while considering safety at the blade edge. For example, a pair of rotatable ball-shaped blade edge guards seen on T30 of Elm Co., Ltd. are provided on both sides of the upper part of the blade, and the tape can pass between the guard balls while being folded in a V shape. A plate that slides adjacent to the blade in front of the blade as shown in ST51 of the Lion Office Machine Co., Ltd. is provided so as to hide the blade tip when not in use, and pushes down the tape before cutting the tape. However, there is a product that lowers the plate by receiving and using it with a tape anchoring part that can swing back and forth while pulling forward. However, both products seem to have some problems with usability. Strictly speaking, both products were able to touch the cutting edge with fingers.
JP-A-1-231766 JP-A-1-308359

  In order to improve the sharpness of the tape, a sharper blade may be attached. However, in order to attach a sharp blade, it is necessary to ensure the safety of fingers on the blade edge. That is, any sharp blade can be attached as long as contact between the finger and the blade edge can be prevented.

  This invention is sharp by preventing contact between the finger and the blade edge by a anchoring portion and a guard plate provided so as to be able to slide up and down, and a pair of guard arms that open and close in conjunction with the vertical movement of the anchoring portion. The purpose is to obtain a tape cutter that can be attached to the blade and can be used more safely and comfortably.

  In order to achieve the above object, the tape cutter of the present invention adopts the method described below.

  A pair of arm-shaped edge guards that are provided so that the tape anchoring part separate from the blade can slide up and down, and when the anchoring part rises, it closes when it is lowered and covers the edge That is, guard arms are provided on both sides of the anchoring portion.

  In order to further enhance safety, a plate-shaped blade edge guard that moves up and down together with the anchoring portion, that is, a guard plate is provided in front of the blade.

In order to prevent the guard arm from closing due to its weight being lowered after the tape is peeled off from the anchoring portion , when the guard arm is in a standby state with the guard arm closed, A magnet is provided in the anchoring portion, and when the magnet rises together with the anchoring portion, it is attracted to the lower end of the iron blade by its magnetic force. Thus , the guard arm is maintained in an open state until the tape is pressed against the anchoring portion after the tape is peeled off from the anchoring portion .

The tension of the tape when the user tries to peel off the tape allows the anchoring portion and its holder to tilt when pulled by the reel. And after tape peeling, it is made to return to the original position.

  The operation of the above means for solving the problem will be described below.

  When the user tries to peel off the tape from the anchoring part, the force transmitted by the peeling resistance on the tape attachment surface pulls up the anchoring part, and when the user tries to cut the tape, the tape pushes down the anchoring part. Become. By using these forces, the guard arm is automatically opened and closed.

If a magnet is used to keep the anchoring part lifted and the guard arm open, the anchoring part's pulling resistance is smaller compared to other methods that use friction force and gravity to maintain it. In addition, when the magnet approaches the lower end of the blade, the magnetic force acts to help the anchoring portion rise.

  In order to lift the anchoring portion smoothly, it is preferable that the bearing position of the reel is slightly higher than the tip of the tape if the sliding direction of the anchoring portion is vertical. This is because the trajectory of the vertical movement of the anchoring section top is placed inside the arc trajectory that the tape tip follows when the wound tape is not peeled off, but this is a limitation in designing the appearance. However, if the anchoring part is tilted toward the reel when the tape starts to be pulled up, the distance between the anchoring part and the reel is reduced, and the tape is folded into a fold between the anchoring part and the reel, and the anchoring part is Since the moving direction and the direction in which the tip of the tape is drawn approach each other, the anchoring portion can be raised smoothly even if the bearing position of the reel is designed low.

  In a state where the tape is peeled off from the anchoring portion and the guard arm is opened, the guard plate and the anchoring portion hide the blade edge from the front and rear, and the guard arm is closed and covers the blade edge from above when the tape is cut and after cutting.

If the anchoring portion is pushed down with the fingertip when the guard arm is opened and the blade tip is intentionally touched, the guard arm is closed when the anchoring portion is lowered, and the movement stops when the guard arm pinches the fingertip. Since the interlocking anchoring part does not go down any further, the cutting edge cannot be touched.
When cutting the tape, the guard plate is lowered and its upper end is slightly lower than the blade line. If the blade tip is intentionally touched after cutting, the guard arm is opened with the fingertip, and if the guard arm is opened, the guard plate is raised by that amount, so that the blade tip cannot be touched.

Since the guard arm, the guard plate, and the anchoring portion hide the blade edge from above and behind the blade, it is impossible to intentionally touch the blade edge, and a high level of finger safety at the blade edge can be ensured. Thereby, it is possible to attach a sharp blade having a sharp edge such as a straight blade.
The merit obtained by using a straight blade is that the cut edge does not become jagged, so that it is difficult to tear diagonally when peeling the attached tape, and it is easy to peel off, and the appearance is beautiful.

  Even if the user is not aware of it, the guard arm can be opened and closed automatically by using the force when peeling the tape from the anchoring part and the force pressing the tape against the anchoring part. It can be used in almost the same operation as a general tape cutter.

  Since the anchoring portion can be inclined to the reel side, the anchoring portion can be smoothly raised even if the reel bearing position is designed low, so that the appearance can be designed more freely. In addition, using a magnet to keep the guard arm open also helps the smoother and more reliable operation of the mechanism, so it can respond widely to the differences in how the tape is pulled up depending on the situation during use and the user, It is possible to eliminate the pulling failure that the tape peels off from the anchoring portion before the anchoring portion is completely lifted. Therefore, it can cope with the use of tapes with weak adhesive strength such as masking tape.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state where the guard arm is closed, and FIG. 2 is a front view showing a state where the anchoring portion is pulled up and the guard arm is opened. FIG. 3 is a side view of the guard arm closed.

  As for the configuration of the parts, main parts constituting this mechanism are incorporated between the front holder 9 and the rear holder 8. The blade 6 is screwed to the front holder and fixed. Two holder pins 14 are erected on the rear holder, and the left and right guard arms 3 rotate around these pins. The left and right guard arms are plane-symmetric with each other and have a mirror image shape.

  The anchoring portion 4 is also symmetric, and the anchoring portion slides up and down between the blade 6 and the rear holder 8, so that there are two long holes to avoid the holder pins 14 protruding from the rear holder. Two interlocking pins 15 for interlocking the left and right guard arms 3 are set up inward.

  The base of the guard arm 3 has a hole for receiving the holder pin 14 protruding from the rear holder and an elongated hole for receiving the interlocking pin 15 protruding from the anchoring portion. It rotates in conjunction with the movement of the interlocking pin 15 of the clasp. That is, the guard arm opens and closes at the same time in conjunction with the vertical movement of the anchoring portion. 4 and 5 show the positional relationship between the holder pin 14 and the interlocking pin 15 when the guard arm is closed and opened, respectively. Further, the lower rear portion of the arm portion exposed to the outside is removed so as not to interfere with the landing portion during operation.

  The U-shaped guard plate 5 positioned between the front holder 9 and the blade 6 fixed to the front holder is made separately from the anchoring portion, and the protrusions provided on the left and right sides of the guard plate 5 are arranged on the anchoring portion side. It fits together at the notch 17 and moves up and down together with the anchoring portion. FIG. 6 shows the position of the blade when the guard arm is opened. Fig. 7 shows the guard plate assembled on the anchoring part. The blade 6 is a straight blade.

  The magnet 7 is fixed below the anchoring portion so as to be attracted to the lower end of the blade 6 by a magnetic force when it is raised. FIG. 8 shows a state where the anchoring portion is lowered, and FIG. 9 shows a state where the anchoring portion is raised and the magnet is attracted to the blade.

  The rear holder 8 is attached to the tape cutter main body via a shaft 10 penetrating the lower hole, and swings back and forth around the shaft. The rear part of the rear holder is pushed up by a coil spring 11 installed on the main body bottom plate 13. FIG. 10 shows this.

  The operation at the time of use in the above mechanism will be described below.

  First, when the user tries to peel off the tape from the anchoring portion, the anchoring portion is pulled toward the reel by the tension of the tape, and the front and rear holders are tilted backward. Next, the anchoring portion is pulled up by the force transmitted by the peeling resistance of the tape adhering surface, and the guard arm is opened in conjunction therewith. This movement stops when the magnet fixed below the anchoring portion is attracted to the lower end of the blade, and then the tape is peeled off from the anchoring portion.

  The guard arm must be open until the required length of tape is pulled out and then pressed against the anchoring portion, but this state is maintained by the magnetic force of the magnet. The front and rear holders tilted to the reel side are pushed back by coil springs and returned to their original positions immediately after the tape is peeled off from the anchoring portion.

  When the user presses the tape against the anchoring portion in order to cut the tape, the anchoring portion is pushed down by the force, and the guard arm associated with the movement closes so as to follow the tape to be lowered.

  Even when the guard arm is closed with the tape peeled off from the anchoring portion, such as when the tape is replaced, it can be easily opened with the fingertip. If the guard arm is opened, the anchoring portion will rise and the magnet will maintain that state.

Front view with guard arm closed Front view with guard arm open Side view Rear holder, anchoring part and guard arm component drawing (guard arm closed) Rear holder, anchoring part and guard arm parts assembly drawing (guard arm open) Part drawing showing blade position Part drawing showing the guard plate attached to the anchorage Sectional view along line AA passing through the holder pin 14 Sectional view along line BB passing through interlocking pin 15 Partial sectional view of the center

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tape 2 Reel 3 Guard arm 4 Anchoring part 5 Guard plate 6 Blade 7 Magnet 8 Rear holder 9 Front holder 10 Shaft 11 Coil spring 12 Main body 13 Main body bottom plate 14 Holder pin 15 Interlocking pin 16 Screw 17 Notch

Claims (5)

A pair of arm-shaped cutting edge guards that interlock with the tape anchoring part separate from the blade so that it can slide up and down, and opens when the anchoring part rises, and closes and conceals the cutting edge when lowered Is a tape cutter provided on both sides of the anchoring section. The tape cutter according to claim 1, wherein the tape cutter is configured to wait in a state where the pair of arm-shaped blade edge guards are closed.   The tape cutter according to claim 1 or 2, wherein a plate-like blade edge guard that moves up and down together with the anchoring portion is provided in front of the blade. By providing a magnet in the anchoring part, a pair of arm-shaped edge guards are kept open until the tape is pressed against the anchoring part again after the tape is peeled off from the anchoring part . The tape cutter according to claim 2 or claim 3. The tension of the tape when the user tries to peel off the tape can be tilted if the anchoring portion and its holder are pulled to the reel side. 4. The tape cutter according to 4.

Images