JP2003265875A - Safety scissors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extremely safe pair of scissors for even schoolchildren to use by definitely preventing the opening of the blade body and that can easily cut even thick papers and can also cut an elastic tape without any risk and easily rip off the cut piece from the guiding surface. <P>SOLUTION: The pair of scissors that can undo the blade edge parts 10, 11 of the tip parts placed face to face with each other when the blade parts are in a closed position and can lay on one another the tip part of the blade part is provided with hooking means 14, 15 for maintaining the overlapping position. Another component is the means provided to at least one side of the guiding surfaces of the blade part that faces in the traveling direction when both blades are in closed position for easy peeling off the cut piece of an elastic tape adhered to the guiding surface when cutting the elastic tape. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to scissors that are safe to handle, and more particularly to safety scissors that are optimum for school children.

[0002]

2. Description of the Related Art Conventionally, there are scissors that prevent the blade portion from opening when not in use. For example, utility model registration No. 306
The safety scissors described in Japanese Patent No. 7697 provide a slight gap between both handles, and can displace the tip side portion and the base end side portion of the handle alternately inward and outward with the stop shaft as a fulcrum. With the blade closed, push the side of the tip of the blade inward to prevent the blades from opening and keep the side of the base end of the handle. By pushing it inward, the overlapping state of the tip side portion of the blade portion is eliminated and the blade body can be opened.

That is, in the invention disclosed in the official gazette, as described in the detailed description thereof, the inner surface of the handle is not brought into close contact with each other and a slight gap is provided between the two. By providing this gap, the tip side part and the base end side part of the handle can be displaced alternately inward and outward like a seesaw with the support shaft as a fulcrum, and when the blade part is closed, the tips of both blade parts are moved. It is intended to prevent the blade portion from opening by stacking.

Further, as described in the above publication, the scissors having the blade edges facing each other, the cutting piece of the adhesive tape when cutting the adhesive tape, the leading edge of the blade facing the traveling direction when closing the blade. Adhere to the surface. At this time, when the leading surface of the blade is wide as in the above publication, the cut pieces of the adhesive tape adhere to the leading surface entirely.

[0005]

The ordinary scissors perform a cutting action while pressing a pair of blades so that they cross each other and press each other. The force with which the blade is pressed is called the blade pressure. In order to apply the blade pressure, there is a gap between the two blades on the spindle, and the blade pressure is set by the reaction force between the blades and the blades behind the spindle. To give. Therefore, although the tips of the blades are given a force to move toward each other, the tips of the blades have contact points even if both handles are pushed inward to separate the tips of the blades. Will never leave.

It is natural that the tips of the blades do not separate even if both handles are pushed inward. If the tips of the blades separate, the intersecting blades will separate while being pressed against each other during cutting. It will end up. It is well known that the blade is twisted when the intersecting blades are separated during cutting, and that the object cannot be cut when the blade is twisted.

The scissors of the above-mentioned utility model publication described as a conventional example are characterized in that the handle usually takes a parallel posture and a gap is provided between the two handles, and the blade portions pass each other by the opening / closing operation of the blade body. It is possible to cut paper etc. That is, there are no touch points on the scissors. Therefore, it is obvious that the blade will be twisted when cutting a slightly thick paper or the like. Further, the means for preventing the blade body from opening has a configuration in which the tip side portions of the blade portions are simply overlapped with each other. Therefore, there is a risk that the blade body will open even if a slight force is applied to the tip of the blade portion or the base end portion of the handle. Therefore, an object of the present invention is to provide scissors which can reliably prevent the blade from opening and which is extremely safe for use by school children. Another object of the present invention is to provide scissors capable of easily cutting thick paper or the like.

Further, as described above, when the leading surface of the blade is wide as in the above-mentioned publication, the cut pieces are entirely attached to the leading surface when the adhesive tape is cut. Therefore, when the schoolchild tries to peel off the cut piece, it cannot be peeled off easily, and since the work is performed close to the cutting edge, there is a risk of damaging the skin. It is also often experienced that only a part of the cut pieces is peeled off while the peeling is being performed, and the remaining cut pieces remain attached to the leading surface.
In such a case, it is more difficult to peel off the remaining cut pieces, which increases the risk for school children. Therefore, it is an object of the present invention to provide scissors which can easily peel off a cutting piece from the leading surface when cutting the adhesive tape and which is not dangerous even when cutting the adhesive tape.

[0009]

According to a first aspect of the present invention, a pair of scissors are rotatably connected to each other about a support shaft so that a blade portion can be opened and closed, and a blade edge of at least one blade portion. The part faces inward and cooperates with the blade edge of the other blade to perform a cutting action,
By pressing both blades inward with the blades closed, the tip portions of the blades can be overlapped with each other, and a locking means for maintaining the overlapped state is provided. According to a second aspect of the present invention, an element provided with a finger-contacting surface for moving the tip of the blade portion so as to overlap the tip end portions of the blade portion with the blade portion closed is added to the first aspect. According to a third aspect of the present invention, the finger-contacting surface is provided at the tip of the scissors.

According to a fourth aspect of the present invention, the locking means for maintaining the overlapping state of the tip portions of the blade portion is formed on the blade portion itself. According to a fifth aspect of the present invention, the locking means for maintaining the overlapping state of the tip portions of the blade portions is formed by bending the corner portions of both blade edge tips so as to be inclined in a direction in which they overlap and come into contact with each other. According to a sixth aspect of the present invention, the blade portion has a configuration in which an element including a scissor base plate and a blade body attached to the base plate is limitedly added to the first to fifth aspects. According to a seventh aspect of the invention, an element in which the blade has a substantially L-shaped cross section is limitedly added to the sixth aspect.

According to the present invention, a pair of scissors are rotatably connected to each other about a support shaft so that a blade portion can be opened and closed.
At least one of the leading surfaces of the blades facing the traveling direction when closing both blades, when the cut piece of the adhesive tape cut in the case of cutting the adhesive tape adheres to the leading surface, This is a configuration in which means for facilitating peeling is provided.

In a ninth aspect of the present invention, the means for facilitating the peeling of the cut piece of the adhesive tape is configured to substantially reduce the adhesive area of the tape on the leading surface, and the tenth aspect of the invention is to cut the adhesive tape. The means for facilitating the peeling of the strip is a configuration in which the projections are arranged side by side in the lengthwise direction of the leading surface, and the means for facilitating the stripping of the cut piece of the adhesive tape is claimed in claim 11. The wavy irregularities are provided side by side in the lengthwise direction of the leading surface.

According to a twelfth aspect of the present invention, the blade portion comprises a scissors-shaped substrate and a blade body attached to the substrate, and the substrate is provided with means for facilitating peeling of the cut piece of the adhesive tape. The elements are limited to the configurations of claims 8 to 11. According to a thirteenth aspect, when the adhesive tape is cut, the means for facilitating the peeling of the cut piece of the adhesive tape is first contacted with the adhesive tape, and then the means is cut so that the adhesive tape is cut. The elements protruding ahead of the blade edge are limited to the configurations of claims 8 to 12. According to a fourteenth aspect of the present invention, the blade portion is integrally formed of a metal plate, and the metal plate is once folded along a bending line extending in a longitudinal direction, and further folded back at a right angle with a little remaining folded portion to form an L-shape. However, the folded-back portion is configured to recede more than the folded portion and the folded portion projects in the traveling direction.

[0014]

According to the present invention, which has the above-mentioned constitution,
The blade edge of at least one blade portion faces inward and cooperates with the blade edge portion of the other blade portion to perform a cutting action, and by pressing both blade portions inward with the blade portions closed, It is possible to overlap the tip portions of the parts, and a locking means for maintaining the overlapped state is provided. Therefore, it is possible to maintain the overlapping state of the tip end portions of the blade portions, and thus it is possible to provide safe scissors that reliably prevent the blade portions from opening when an impact or some force is applied to the scissors.

According to a second aspect of the present invention, there is provided a finger-contacting surface for moving the tip of the blade so that the tip of the blade is superposed with the blade closed. Therefore, it is possible to continuously perform the work of removing the facing state of the blade edges of the blade tips and the operation of overlapping the tip portions of the blade parts with the fingers on the finger facing surface at one place. It can be handled easily. According to the third aspect of the present invention, since the finger-contacting surface is provided at the tip of the scissors, it is possible to perform the superimposing work with a slight force, so that a user who is not physically fit, such as school children, can easily use it.

According to a fourth aspect of the present invention, locking means for maintaining the overlapping state of the tip end portions of the blade portion is formed on the blade portion itself. Therefore, the manufacturing cost can be reduced because no separate component is required. According to a fifth aspect of the present invention, the locking means for maintaining the overlapping state of the tip portions of the blade portions is formed by bending the corner portions of both blade edge tips so as to be inclined in a direction in which they overlap and come into contact with each other. It was done. Therefore, the locking portion can be provided by simply bending the blade portion without requiring any special part, and therefore the manufacturing is easy and costs little.

According to an eighth aspect of the present invention, there is provided scissors in which a pair of scissors are rotatably connected about a spindle so that a blade portion can be opened and closed.
At least one of the leading surfaces of the blades facing the traveling direction when closing both blades, when the cut piece of the adhesive tape cut in the case of cutting the adhesive tape adheres to the leading surface, This is a configuration in which means for facilitating peeling is provided. Therefore, the adhesive tape can be easily cut to remove the cut piece adhered to the leading surface.Therefore, there is no risk of taking the cut piece with difficulty near the blade edge especially when the cut piece is short. Safe when cutting short.

According to a ninth aspect of the present invention, the means for facilitating peeling of the cut piece of the adhesive tape is configured to substantially reduce the adhesive area of the tape on the leading surface. 12. The means for facilitating the peeling of the strips are projections arranged side by side in the longitudinal direction of the leading surface,
The means for facilitating the separation of the cut pieces of the adhesive tape is a corrugated concavo-convex lined up in the lengthwise direction of the leading surface. Therefore, a means for facilitating the peeling of the cut pieces of the adhesive tape can be provided at low cost.

According to a twelfth aspect, the blade portion comprises a scissors-shaped substrate and a blade body attached to the substrate, and the substrate is provided with means for facilitating peeling of the cut piece of the adhesive tape. It is a composition. Since the substrate is usually formed of plastic, a means for facilitating the peeling of the cut pieces of the adhesive tape can be provided by injection molding of the plastic, and the production is simple.

According to a thirteenth aspect, when the adhesive tape is cut, the means for facilitating the peeling of the cut piece of the adhesive tape is first contacted with the adhesive tape, and then the means is cut so that the adhesive tape is cut. It is configured to protrude ahead of the blade edge of the blade portion. Therefore, since the cut piece first contacts the leading surface and adheres, the cut piece is held in a stable state on the leading surface, and the cut piece can be easily removed. Claim 14
The blade part is integrally formed of a metal plate, and the metal plate is once folded along a bending line extending in the longitudinal direction, and the folded part is folded back at a right angle to form an L-shape. Is retracted from the folded portion and the folded portion projects in the traveling direction. Therefore, since the means for facilitating the peeling of the cut pieces of the adhesive tape is formed only by bending the metal plate, the manufacturing is simple and the cost can be reduced.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. As for the scissors, a pair of scissors 1 and 2 are coupled around a support shaft 3, and blades 4 and 5 can be opened and closed. Blade 4, 5
Is an L-shaped metal blade 8 on the substrates 6 and 7 integrated with the scissors.
9 is attached. Blade edge 10, 1 of blade
1 is not sharp but is formed in a flat shape as shown in the drawing and is bent inward. The two edge portions 10 and 11 are faced to each other at their intersecting positions and rub against each other to perform a cutting action. Needless to say, the blade portions 4 and 5 are not limited to those in which the blade bodies 8 and 9 are attached to the substrates 6 and 7 as described above, and may be integrally formed of only metal plates.

Locking portions 14 and 15 are formed by bending the tips of the blade edge portions 10 and 11 so that their corners are inclined toward the spines 12 and 13 of the blade portions. Therefore, the shapes of the locking portions 14 and 15 are triangular. When the two blade portions 4, 5 are pushed inward and the two locking portions 14, 15 are overlapped with each other, the portions corresponding to the long sides of the triangular locking portions 14, 15 rub against each other,
Move inward with respect to each other, but the portions corresponding to the long sides thereof are gently inclined, so that the two blade portions 4, 5 can be smoothly moved with a small force. For this reason, it is preferable that the inclination angle of bending of the locking portion is about 5 ° to 20 °. However, it goes without saying that in the present invention, the bending angle of the bending of the locking portions 14 and 15 is not limited to this numerical value.

The substrates 6 and 7 are formed integrally with the plastic scissors 1 and 2, and are formed by integrally attaching the blades 8 and 9 at the time of molding. Backs 12 and 1 at the tips of substrates 6 and
3 are provided with finger facing surfaces 16 and 17. The finger facing surfaces 16 and 17 are provided obliquely with respect to the substrates 6 and 7 in order to remove the facing state of the blade edge portions 10 and 11 and to apply a force in a direction in which the locking portions 14 and 15 are overlapped. ing. The finger facing surfaces 16 and 17 may be flat or concave.

FIG. 4 shows a cross section at each position of A, B and C in FIG. 3 during use. Since the flat blade edges 10 and 11 facing each other rub against each other to perform a cutting action, the blade edges 10 and 11 are in the same plane at each position. FIG. 5 shows that the locking portions 14 and 15 are used after use.
3 of FIG.
It shows a cross section at each position of B and C. FIG. 5A is a cross-section at the position A, and the bent locking portions 14 and 15 are overlapped with each other to be in a locked state, and the blade portion is prevented from opening. (B) is a cross section at the position B,
The blade edge portions 10 and 11 bite into the other blade portion.
As can be understood from this, the reason why the locking portions 14 and 15 overlap is that the blade portions 4 and 5 are bent inward by their own elasticity.

FIG. 6 illustrates an operation for stacking the locking portions 14 and 15 to bring them into a locked state. As shown in the drawing, when the finger contact surfaces 16 and 17 are pushed with the fingertips after closing the blade portions 4 and 5, the blade edge portions 10 and 11 facing each other are displaced from each other, and the overlapping state is removed. When it is pushed further, the blade parts 4 and 5 move toward each other and the locking parts 14 and 15
Are overlapped with each other to be in a locked state as shown in FIG. As a result, the blades 4 and 5 are locked in the closed state, so that the blades 4 and 5 are safe because they do not open even if some force or impact is applied to them. Since the finger-contacting surfaces 16 and 17 are formed so as to be inclined with respect to the blade portions 4 and 5, once the finger is directed to the finger-contacting surfaces 16 and 17, the fingers are brought into the locked state without being replaced. be able to. When the blade portions 4 and 5 are in the locked state, the blade edge portions 10 and 11 have the other blade edge biting into the crocodile, as shown in FIG. .

FIG. 7 shows an operation for unlocking the blades 4 and 5 in the locked state. As shown in the drawing, when the inner surfaces of the blade portions 4 and 5 in the locked state are pushed outward with fingers, the overlapping locking portions 14 and 15 are disengaged from each other, so the locked state must be released. You can This allows the scissors to be in use.

Leading surfaces 18 and 19 of the blades, that is, spines 12 and 1 of the blades, which are oriented in the traveling direction when the blades are closed.
Protrusions 20 and 21 are integrally provided on the surface on the opposite side of 3. Since the projections 20 and 21 are for substantially reducing the adhesive area of the tape on the leading surfaces 18 and 19, any configuration may be used as long as it produces the same effect. For example, as shown in FIG.
May be In addition, the blade part is integrally formed of a metal plate, and the metal plate is folded once with a bending line extending in the longitudinal direction, and further folded back at a right angle with a little leaving the folding part to form an L-shape, and the folding part is folded. It may be one that is retracted from the portion and the folded portion projects in the traveling direction.

When cutting the adhesive tape with scissors having the projections 20, 21 or the irregularities 22 provided on the leading surfaces 18, 19, the cut pieces do not adhere to the leading surfaces 18, 19 entirely and are easily peeled off. be able to. Even if there are no protrusions or the like, anyone can easily peel off the cut piece of adhesive tape if it is long, but if the cut piece is short, it is very difficult to peel it off, which was dangerous for school children. . However, since the cut pieces can be easily peeled off by providing the projections and the like, the work of cutting the adhesive tape can be safely performed. Since the blade edges 10 and 11 extend over substantially the entire length of the blades 4 and 5, it is possible to cut a wide adhesive tape, and in this case also, the adhesive tape attached to the leading surface is cut. The piece can be easily peeled off.

[Brief description of drawings]

FIG. 1 is a perspective view of a tip of a blade portion.

FIG. 2 is a front view of the tip of the blade.

FIG. 3 is a front view of the present invention.

FIG. 4A is A in FIG. 3 before the blade portion is locked.
-A sectional end view, (b) is the same BB sectional end view, (c)
Is an end view of the same CC cross section

5 (a) is an A in FIG. 3 after the blade portion is locked.
-A sectional end view, (b) is the same BB sectional end view, (c)
Is an end view of the same CC cross section

FIG. 6 is a process diagram showing the action of bringing the blade portion into a locked state.

FIG. 7 is a process drawing showing the action of releasing the locked state of the blade portion.

FIG. 8 is a perspective view of another embodiment of the means for facilitating the peeling of the cut pieces of the adhesive tape.

[Explanation of symbols]

1 scissors 2 scissors 3 spindles 4 blade 5 blade 6 substrate 7 substrate 8 blades 9 blades 10 blade edge 11 Blade edge 12 Blade back 13 Blade back 14 Locking part 15 Locking part 16 fingers 17 Finger addressed section 18 Leading surface 19 Leading surface 20 protrusions 21 Protrusion 22 Wavy unevenness

Claims (14)

[Claims] 1. A pair of scissors is rotatably connected about a spindle so that a blade portion can be opened and closed, and a blade edge portion of at least one blade portion faces inward, and a blade of the other blade portion. In the scissors, which cooperates with the edge portion to perform a cutting action, and in which the tip portions of the blade portions can be overlapped by pushing both blade portions inward with the blade portions closed, maintain the overlapping state. Safety scissors characterized by being provided with locking means for 2. The safety scissors according to claim 1, further comprising a finger-contacting surface for moving the tip of the blade so that the tip of the blade is overlapped with the tip closed when the blade is closed. 3. The safety scissors according to claim 2, wherein the finger-contacting surface is provided at the tip of the scissors body. 4. The safety scissors according to claim 1, wherein the locking means for maintaining the overlapping state of the tip portions of the blade portion is formed on the blade portion itself. 5. The blade edge portions of both blade portions face inward, and the locking means for maintaining the overlapping state of the tip end portions of the blade portions overlaps the corner portions of both blade edge portions. The safety scissors according to claim 4, which are bent so as to be inclined in the direction of the other blade to form a locking portion. 6. The safety scissors according to claim 1, wherein the blade portion comprises a scissor-body base plate and a blade body attached to the base plate. 7. The cross section of the blade is substantially L-shaped.
Listed safety scissors 8. A pair of scissors in which a pair of scissors are rotatably connected to each other about a support shaft so that a blade portion can be opened and closed, and the blade portion is directed in a traveling direction when both blade portions are closed. At least one of the surfaces is provided with means for facilitating separation of the cut piece of the adhesive tape when the cut piece of the adhesive tape is cut when the adhesive tape is cut and adheres to the leading surface. Safety scissors 9. The safety scissors according to claim 8, wherein the means for facilitating the peeling of the cut pieces of the adhesive tape is configured to substantially reduce the adhesive area of the tape on the leading surface. 10. The safety scissors according to claim 9, wherein the means for facilitating the peeling of the cut pieces of the adhesive tape are projections provided side by side in the longitudinal direction of the leading surface. 11. The safety scissors according to claim 9, wherein the means for facilitating the peeling of the cut pieces of the adhesive tape are corrugated irregularities arranged side by side in the lengthwise direction of the leading surface. 12. The blade comprises a scissors-shaped substrate and a blade attached to the substrate, and the substrate is provided with means for facilitating peeling of cut pieces of the adhesive tape. To the safety scissors according to claim 11. 13. When the adhesive tape is cut, the means for facilitating the peeling of the cut pieces of the adhesive tape is first contacted with the adhesive tape, and then the means is used for cutting the adhesive tape. The safety scissors according to claim 8 to claim 12, which protrudes ahead of the blade edge. 14. The blade part is integrally formed of a metal plate, and the metal plate is once folded along a bending line extending in the longitudinal direction, and further folded back at a right angle with a little leaving the folded part to form an L-shape. 14. The safety scissors according to claim 13, wherein the folded-back portion is retracted from the folded portion and the folded portion projects in the traveling direction.