JPS5914097Y2 - gold cutting scissors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of metal cutting scissors particularly for cutting rain gutters.

A rain gutter in which the metal cutting shears of the present invention are used has a cross-sectional shape as shown in FIG.

A feature of this rain gutter is that a vinyl chloride coating 9 is provided on the surface of the iron plate 8.

The groove 10 is rectangular, and both ends of the groove are connected to the iron plate 8.
are each bent inward in a U-shape to form ribs 11, 11 having a square cross section.

Only vinyl chloride extends in a straight line portion 18 connecting the edge 12 of the iron plate bent into a U-shape and the base 13 of the rib.

Next, to explain the configuration of the present invention, the present invention has two blade bodies 1.
, 1 is rotatably mounted on a support shaft 2, and blade parts 3, 3 work together to perform a cutting action, and a part of the edge of one of the blade parts is triangular. It stands out.

The apex 5 of this triangle has an angle slightly larger than a right angle, the oblique side 14 in front of the apex has a gentle inclination, and the oblique side 15 behind the apex has a large inclination angle.

This apex 5 may be slightly rounded.

The other blade part is provided with a rectangular recess 6' extending inward from the blade edge, and the inner edge of the recess 6 is formed so that it can perform a cutting action in cooperation with the blade edge of the one blade part. In particular, the bottom part 16 is cut diagonally and has a sharp blade 17.

When the blade parts 3, 3 are opened and closed for cutting action,
The protruding blade is arranged so that the apexes of the protruding blade edge of one blade part always move along the rear inner edge 7 of the recessed part 6 of the other blade part to a position slightly forward of the rear inner edge 7 of the other blade part. The edge 4 and the recess 6 are positioned.

Next, the effects of the present invention will be explained.

When attempting to cut a rain gutter, the rib 11 is first applied to the recess 6 of the blade.

In this case, the inner edge of the recess should correspond to the steel plate portion bent into a U-shape.

Therefore, the portion 18 of the rib made of only vinyl chloride is the recess 6
It will face in the same direction as the open mouth.

Since the size of the rib 11 is large enough to be inserted into the recess 6, when the rib is placed in the recess, it will not fit completely as shown in Fig. 4, but will get caught near the opening, and the blade will break. When closing the parts 3, 3, the protruding blade edge 4 touches the rib 11.
The rib is pushed into the recess 6 by pressing .

Figure 4 shows the state on the verge of cutting and closing the rain gutter. When the blade parts 3, 3 are further closed from this state, the rear oblique side 15 of the protruding blade edge and the rear side of the recess are first cut. A first portion 1 of an iron plate whose directional side edges 7 are bent into a U-shape
9, then the blade edge in front of the apex 5 and the front edge 20 of the recess work together to cut the third portion 21 of the U-shaped iron plate, and finally the blade edge including the protruding blade edge 4 A sharp blade 17 provided at the bottom of the recess 6 works together to cut the second portion 22 corresponding to the bottom of the U-shaped iron plate.

The rib 11 is completely cut by these actions, and then the flat PVC iron plate that makes up the groove is cut with the straight edge of the blade, and the other rib 11 remaining at the end is cut. Cut using the method described above.

The present invention has the above-described configuration, and since the apex 5 of the protruding blade edge is located toward the rear of the recess 6, the rib 1
When cutting the first portion 19 and the third portion 21, it is possible to start cutting the first portion 19 and the third portion 21 at different times.

That is, as the rib 11 is cut, the first part 19 of the rib is first cut by the rear oblique side 15 and the rear inner edge 7 of the protruding blade edge, and after the cutting has progressed a little, the first part 19 of the rib is cut by the rear oblique side 15 and the rear inner edge 7 of the protruding blade edge. The third portion 21 begins to be cut between the blade edge and the front inner edge 20.

The cutting action using ordinary metal scissors requires the greatest force just before the start of cutting, and the present invention is similar in this respect.

However, with conventional metal cutting scissors, the first and third parts start cutting at almost the same time, requiring twice the force to start cutting. Since the cutting start time is shifted, it does not require as much force as conventional products.

Furthermore, if the protruding blade edge 4 does not exist and one of the blade parts consists of only a flat blade edge, an inward component of force will act on the first portion 19 when cutting the rib. become,
Since the rectangular rib 11 is hollow, the rib is crushed.

In the present invention, a rearward force is applied to the first portion 19 of the rib due to the action of the rear oblique side 15 of the protruding blade edge, so there is no risk of the rib being crushed.

In addition, because the apex 5 of the protruding blade edge is provided close to the rear inner edge 7, the rear oblique side 15 has a large angle with respect to the other straight blade edge parts, so that the rear oblique side 15 and the rear side of the recess The angle with the inner edge 7 becomes smaller.

The shear force for cutting the first part 19 of the rib is therefore oriented very close to perpendicular to the plane of the first part, so that the cut of the first part is particularly chestnut.

As described above, the present invention causes a time lag in the cutting of the knob, and is novel in all aspects, purpose, structure, and effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view thereof, FIG. 2 is a cross-sectional end view taken along line A-A, FIG. 3 is a side view of a rain gutter, and FIG. 4 is a rib of the rain gutter. FIG. 3...Blade portion, 4...Protruding blade edge, 6...
... recess, 11 ... rib.

Claims (1)

[Scope of utility model registration request] In metal cutting scissors, in which two blade bodies 1, 1 are rotatably attached to a support shaft 2, and the blade parts 3, 3 work together to perform a cutting action, a part of the edge of one blade part is slightly The tip of the protruding blade edge 4 forms an apex 5, and the other blade part is provided with a rectangular recess 6 extending inward from the blade edge. The blade edge including the protruding blade edge 4 of the one blade portion and the inner edge of the recess 6 can cut together,
In addition, during this cutting action, the apex 5 of the one blade always moves along the rear inner edge 7 to a position slightly forward of the rear inner edge 7 of the recess of the other blade. Features gold-cutting scissors.