JPS6024286Y2 - scissors - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of scissors in which a pair of iron structural members each having a blade body are pivotally connected to each other by a support shaft in an intersecting manner so that they can be freely opened and closed. By imparting force, pushing force, or both functions, it contributes to improving sharpness.

Normal type scissors have a pair of upper and lower blades rotate in the closing direction around a spindle to clip the desired object to be cut, and at the beginning of the cut, both blades are relatively Since the blades are opened in a V-shape at a large angle, the angle of contact of each blade with the object to be cut is also large, and the blades bite smoothly and cut well, but the rotation of both blades in the closing direction is As the cutting progresses and the contact angle of each blade with respect to the object to be cut becomes smaller, the biting force of the blade gradually decreases, resulting in a disadvantage that the cutting edge of the blade becomes dull.

In addition, since clipping is performed by pressing each blade against the object in an inclined position and forcibly biting into the object, the material of the object to be cut should not be hard or thick. We often experience in daily life that the cutting operation requires a considerable amount of human power.

In view of this, the present invention has a thin blade made of a separate member attached to at least one of the upper and lower blade bodies of the scissors, and the thin blade is moved forward along the blade body when cutting the object to be cut. By sliding the cut member in the direction or backward direction, the member to be cut is not simply pinched off, but is pulled or pushed to improve the cutting quality, thereby eliminating the above-mentioned drawbacks.

In other words, when cutting something with a kitchen knife or a knife, it is normal to pull the knife or knife towards the object or push it in the opposite direction. can be easily cut.

The present invention focuses on this point and integrates this pulling or pushing function with the scissor's pinching function.

In the embodiment configuration shown in FIGS. 1 to 8, A and B are two pairs of scissor component members constituting the scissors, each of which is a continuous integral blade body 1a or 1b and a complement member 2a.
or 2b, both members A and B are pivoted by a support shaft 3 in a crossed state between both blade bodies and the complement, and the support shaft 3 is used as a fulcrum. complement 2a, 2b
The blade bodies 1a and lb are opened and closed by the opening and closing operations.

On the side of one member A, a thin blade 5a having a sharp cutting edge 4 is attached to the blade 1a on the side facing the blade 1b of the other member B.

The thin blade 5a rotates together with the blade 1a, and when cutting a desired object such as paper, generates a sliding movement in the so-called pulling direction toward the base of the blade 1a in conjunction with the rotational movement. By this sliding movement, the cutting object precedes the blade 1a and works together with the blade 1b to cut the object.

Therefore, the cutting edge 4 of the thin blade 5a is always attached to the blade body 1 as shown in FIG.
The thin blade base end 6 is attached to the blade body 1a in a state that always protrudes beyond the blade part 8 of a, and the thin blade base end 6 is attached to the mating member B, and the support shaft 3
The thin blade 5a is attached via a pivot pin 7 that rotates around its center, and a long hole 9 that is approximately parallel to the blade part 8 is provided at the tip of the thin blade 5a. A guide pin 10 protruding from the side surface is loosely fitted into the pivot pin 7.
is set on member B at an upper position sandwiching the longitudinal axis X of the scissors passing through the support shaft 3, so that when the scissors are closed, the pivot pin 7 rotates in the direction of arrow a in FIG. It is structured as follows.

In addition, in FIG. 4, 11 is a leaf spring, and 12 is a leaf spring 11.
The leaf spring 11 is interposed between the members A and B at positions on the side of the diseased bodies 2a and 2b that sandwich the support shaft 3, and its spring force moves the complements A and B apart from each other. By pressing, a force is applied to the blade bodies 1a and lb in a direction in which they approach each other, thereby contributing to an improvement in the cutting effect.

In the scissors constructed in this way, the blade body 1a as shown in FIG.
, lb are open, insert the object to be cut between the double blades 1a and lb, and then insert the double blades 1a, lb as shown in FIG.
When lb is closed, the pivot pin 7 rotates around the support shaft 3 in the direction of the arrow a, that is, toward the complement 2ay2b, due to this closing movement, so that the thin blade 5a connects the elongated hole 9 and the engagement pin 10. Due to the engagement structure, the blade 1a is pulled toward the base of the blade 1a in the direction of the arrow and parallel to the blade part 8, and thus the thin blade 5a receives the resultant force of the rotating force of the blade 1a and the sliding force, While cutting the object to be cut, the object is then towed.

5 to 7 show an embodiment structure in which a pushing force is applied to the thin blade 5b instead of a pulling force.

Therefore, in order to give the thin blade 5b a sliding motion in the so-called pushing direction toward the tip side of the blade body 1a during cutting, the base end 13 of the thin blade 5a is configured to move around the support shaft 3, contrary to the configurations in FIGS. 1 and 2. It is fixed to the member B by a pivot pin 14 at a lower position sandwiching the longitudinal axis X of the scissors.

With this configuration, from the state where the blades 1a and lb are open as shown in FIG. 5, the object to be cut is inserted between the double blades 1a and lb, and then the double blades 1a and lb are inserted as shown in FIG. When closing, the pivot pin 14 rotates in the direction of arrow C with this closing movement and applies a sliding force in the pushing direction shown by arrow d to the thin blade 5b.
By receiving the resultant force from the rotational force of the cutting object, the object to be cut is sandwiched and pushed through at the same time.

In addition, as another embodiment, a first
Attach the thin blade for pulling and cutting shown in Figures 1 and 2, and attach the thin blade for pushing and cutting shown in Figures 5 and 6 to the other blade body 1b or 1a, and use a bidirectional sliding motion for both pulling and pushing. It is also possible to cut it.

Figures 8 and 9 show that from the standpoint of safety, when the scissors are opened, the sharp cutting edge 4 of the thin blade 5c is retracted deeper than the blade part 8 of the blade body as shown in Figure 9, and when cutting. That is, an embodiment configuration is shown in which the thin blade edge 4 protrudes below the blade portion 8 only when the scissors are closed, and the thin blade 5C cuts the object to be cut.

In other words, the base end of the thin blade 5C is fixed to the member B by the pivot pin 7 as in the structure shown in FIG.
The elongated hole 15 is formed into a curved elongated hole that approaches the mating blade body 1b of the rear end plug.

In this way, when the pivot pin 7 rotates in the direction of the arrow a during cutting, a sliding force in the direction of the arrow a is generated in the thin blade 5C due to this rotation, and on the other hand, due to this sliding, the curved elongated hole 1
5 and the engagement pin 10, the thin blade 5C is pushed out in the direction of the arrow e, so that the thin blade 5C moves in the direction of the resultant force shown by the arrow f, and as a result, the thin blade edge 4 protrudes from the blade part 8. At the same time, the thin blade 5c cuts the object to be cut.

As described above, the present invention provides so-called nip-cutting type scissors in which a pair of scissors constituent members each having a blade body are pivotally connected to each other using support shafts in an intersecting manner so as to be able to open and close at least one of them. A thin blade that is in line with the other blade body is attached to one blade body so as to be able to slide freely in the longitudinal direction of the blade body, and the base end of the thin blade is attached via a pivot pin that rotates about the above-mentioned support shaft. Since it is attached to the iron component on the other side of the blade, when the two blades are rotated in the cutting direction, the thin blade slides forward or backward along the blade to cut or push off the member to be cut.

Therefore, as a result of adding a pulling or pushing motion to the pinching motion, it is possible to achieve a great cutting effect on the object to be cut, all the way to the tip of the blade, with light manual effort, which has the advantage of dramatically improving sharpness. be.

In addition, depending on which side of the thin blade base end is attached via the pivot pin on either side of the longitudinal axis of the scissors passing through the support shaft, the thin blade can be easily made into a pull-cutting type or a push-cutting type. And you can choose freely.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is a side view of the scissors in an open state, FIG. 2 is a side view of the tip of the scissors in a closed state, FIG. 3 is a cutaway view taken along the line ■■ in FIG. 1, and FIG. 4 is a sectional view of the main part. 5 to 7 show the second embodiment, FIG. 5 is a side view of the scissors in the open state, FIG. 6 is a side view of the tip of the scissors in the closed state, and FIG. −■ is a cutaway view taken along the line arrow. 8 and 9 show the embodiment of FIG. 3, FIG. 8 is a side view of the tip of the scissors in an open state, and FIG. 9 is a cutaway view taken along the line IX-IX in FIG. 8. la, lb...Blade body, 3...Spindle, 5
a, 5b, 5c... Thin blade, 6, 13...
・Thin blade base end, 7.14... Pivot pin, A,
B...Scissors component, X...Longitudinal axis of scissors.

Claims (3)

[Scope of utility model registration request] (1) Scissors in which a pair of scissors constituent members each having individual blade bodies are pivotally connected to each other in an intersecting manner using support shafts so that they can be opened and closed, and at least one of the blades is attached to the other blade. A thin blade facing the blade is attached so as to be slidable in the longitudinal direction of the blade body, and the base end of the thin blade is rotated about the support shaft in the mating member, and the longitudinal axis of the scissors passing through this support shaft is attached. Attach to a pivot pin provided on one side of the sandwiched blade, and further engage a guide pin protruding from the blade on the side to which the thin blade is attached, into a long hole formed at the tip of the thin blade. Scissors characterized by being supported by. (2) The scissors according to claim 1 of the utility model registration, characterized in that the elongated hole provided at the tip of the thin blade is formed parallel to the blade portion of the blade body to which the thin blade is attached. (3) The scissors according to claim 1 of the utility model registration, characterized in that the long hole provided at the tip of the thin blade is curved so that the rear end approaches the mating blade.