TWM558137U - Shear structure improvement - Google Patents

Abstract

A cutting tool comprising: a first knife portion and a second knife portion connected to each other to be movable back and forth in an open position and a closed position, wherein the first blade portion and the second blade portion each have a cutting edge. The cutting edges are staggered; and a restricting portion is a groove or hole extending through one of the two cutting edges adjacent to the cutting edge portion. When cutting, the limiting portion accommodates a metal round bar or wire, and the round bar or wire is blocked from being restricted by the restricting portion, and can be matched with a metal plate and the piece is cut synchronously by the cutting tool, which is more than the traditional type of metal cutting. The next sequence of operations, relative to the reduced time, is more convenient to use.

Description

Shear structure improvement

This creation involves the limitation of cutting tools, especially one that is suitable for the removal of metal materials.

Known tin shear structures are usually composed of two operating lever sets, two grips and two blades. These lever groups connect the corresponding grips to the blade portion, allowing the two blades to perform the cutting operation in a staggered relationship with each other.

The objects of the cutting work are mostly metal wave plates, sheets, round bars or wires. Among them, the metal plate or sheet is flat or meandered, and can be easily cut or cut by the two blades. However, the metal round bar or the outer surface of the wire is a circumferential surface, and the arc-shaped cutting edge contacting the two knives often causes the round bar or the wire to be slid outward by the blade, which is not conducive to cutting or cutting.

In order to solve this drawback, some operators have developed a new tin shear and obtained Taiwan's patent No. M550209, which is well documented. The technical feature of the iron shear is that the two side grooves are respectively arranged on the blunt edges of the two knives which can be staggered. Therefore, the knives are opened to a certain extent, the two blades are separated, and the two side grooves are aligned with each other to accommodate the metal round bar or the wire. When the knives are merged, the two cutting edges are staggered side by side, and the blunt edge is moved to remove the positions of the grooves on both sides, so that the metal round bar or the wire is cut by the wall surface of the side groove.

Although the wall surfaces of the side grooves are staggered from each other, the metal round bar or the wire is prevented from moving outward until the cutting is performed, thereby effectively solving the disadvantage that the metal round bar or the wire is slipped off from the arc-shaped cutting edge.

However, the metal plate or piece is cut by a circular arc blade, and the metal round bar or wire is side The wall of the trough is cut to create two different working parts or positions. Instead, an order of work is added, which delays the use time of the sheet shear.

Secondly, the alignment angle of the grooves on both sides is constant, so that the two knives open the same foot, which is easy to puncture the surrounding people or objects, and relatively raise the risk of work.

Therefore, how to improve the structure of the cutting tool (especially the knife part) has become an urgent problem to be solved in this creation.

In view of this, the main purpose of the shears provided by this creation (especially the metal shears) is to use one of the two-knife parts with a limited structure, which can simultaneously cut metal plates, sheets, round bars and wires. The traditional type of sheet metal shear (the patent No. M550209) saves a sequence of operations and does not require changing the working position or position to relatively reduce the use time of the sheet shear.

Due to the above object, the cutting tool of the present invention comprises: a first knife portion and a second knife portion connected to each other to be movable back and forth in an open position and a closed position, the first knife portion and the first knife portion The two knives each have a cutting edge, the cutting edges are staggered; and a restricting portion is a groove or hole extending through one of the two knives adjacent the cutting edge.

The first blade portion and the second blade portion each have a shearing surface, a front bevel and an abutting surface. Wherein, each cutting edge refers to an adjacent side of the shearing surface and the front inclined surface, and the abutting surface connects the front inclined surface with a blade back, and the cutting back and the shearing surface are on both sides of the knife portion.

In this way, the restricting portion can pass through the shearing surface and the front bevel; or the restricting portion passes through the shearing surface, the front bevel and the abutting surface. In any case, the wall of the restriction is perpendicular to the shear plane and would be the best choice.

Therefore, in this creation, the metal round bar and the wire are housed in the restricting portion. When cutting, the round bar and the wire are blocked from being restricted from moving, and the metal plate and the piece can be synchronized with the clip. Cutting off, saves the operation sequence of “changing the working part or position” compared with the traditional tin shear, and reduces the time and makes it more convenient to use.

In order to make the above objects, features and advantages of the present invention more comprehensible, one or more preferred embodiments are described in detail with the accompanying drawings.

10‧‧‧First operating rod set

11‧‧‧First grip

12‧‧‧ first knife

13, 23‧‧‧ cut face

14, 24‧‧‧ Blades

15, 25‧‧‧ front bevel

16, 26‧‧‧ contiguous faces

17, 27‧‧ ‧ bevel

18, 28‧‧‧ side

19, 29‧‧‧ knife back

20‧‧‧Second operating lever set

21‧‧‧Second grip

22‧‧‧The second knife

30, 34‧‧‧Restrictions

31‧‧‧Diamond layer

32, 36‧‧‧ wall

33‧‧‧Diamond wall

35‧‧‧Diamond grains

40‧‧‧cut objects

42‧‧‧Wire

44‧‧‧cutting department

46‧‧‧Picking section

Fig. 1 is a perspective view showing a first embodiment of the present writing jig.

Figure 2 is a top view of the creation of the cutting tool.

Figure 3 is an enlarged view of a portion of the cutter.

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 3.

Fig. 5 is a cross-sectional view taken along line A-A of Fig. 2.

Figure 6 is a perspective view of a second embodiment of the present writing clip.

Figure 7 is a cross-sectional view of the second embodiment of the cutter with respect to the blade portion.

Fig. 8 is a partially enlarged view of the blade portion.

1 to 5 show a first embodiment of the jig, and a second embodiment of the jig of the 6th to 8th drawings, a view and an enlarged view of each angle. In the figure, the same number is marked with the same component or part of the clip.

First, as shown in Figures 1 to 3, the cutter is a tin shear. The metal shear has a first operating lever set 10 and a second operating lever set 20, and connects a first grip 11, a second grip 21, a first blade portion 12 and a second blade portion 22. .

The first handle 11 and the second handle 21 are separately ergonomically made of non-conductive materials, respectively wrapped around the tail portions of the first operating lever group 10 and the second operating lever group 20, and are firmly fixed. It is convenient for a user to hold the two grips 11, 21 and operate the sheet shear to perform the cutting operation.

The first and second operating rod sets 10, 20 are joined together by a set of fasteners (not labeled) such as rivets, screws and nuts to form a link mechanism disposed in the middle portion of the sheet shear. The link mechanism receives the kinetic energy of the first and second grips 11, 21 to drive the first and second blades 12, 22 in an open position (see Figure 3) and a closed position (see Figure 2). Move back and forth.

In this embodiment, the first and second blade portions 12, 22 and the first and second operating lever groups 10, 20 are integrally formed, but are not at the same end as the first and second grips 11, 21. In some embodiments, the first and second blades 12, 22 are separate from the first and second lever groups 10, 20, and are joined together by other fasteners (such as rivets). Within the scope of this creation.

From the cross-sectional views of Figs. 4 and 5, the first and second blade portions 12, 22 are polygonal, each having a cutting edge 14, 24. In the open position (see Figure 3), the cutting edges 14, 24 are staggered.

The first blade portion 12 has a shearing surface 13, a front bevel surface 15, an abutting surface 16, a blade back 19, a side surface 18 and a slope surface 17. The shearing surface 13 and the blade back 19 are on both sides of the outer surface of the first blade portion 12. The front bevel 15 abuts the shear plane 13 and the other side passes through the abutment surface 16 and is joined to the blade back 19. The side 18 joins the blade back 19 to the ramp 17 and treats the abutting side of the side 18 and the back 19 as a ridge (not numbered) which is just at the back of the blade 14. The bevel 17 abuts the shear plane 13 and is behind the front bevel 15. As such, the cutting edge 14 is curved and refers to the abutting sides of the shearing surface 13 and the front beveling surface 15. In other words, the shear plane 13 and the front bevel 15 are each provided with an acute angle (not numbered) equal to the angle at which the blade 14 cuts into a workpiece 40 or the wire 42.

The second blade portion 22 is substantially identical in structure to the first blade portion 12, but in opposite directions. In other words, the second blade portion 22 also has a shearing surface 23, a front beveling surface 25, an abutting surface 26, a blade back 29, a side surface 28 and a bevel surface 27, and the shearing surface 23 and the front bevel surface 25 together form an arc-shaped abutment. It is regarded as a blade 24 and is interlaced with the blade 14 of the first blade portion 12.

In the present embodiment, these shear faces 13, 23 are parallel. When the first blade portion 12 The second cutting portion 22 is moved to the closed position (see Fig. 2), and the shearing faces 13, 23 are juxtaposed to each other. In some embodiments, the shear faces 13, 23 are beveled. When the first blade portion 12 and the second blade portion 22 are moved to the closed position (see FIG. 2), the shear faces 13, 23 face each other and have an acute-angled gap, supporting the two blades 14 and 24 to be interlaced. In the scope of this creation.

In the figure, the first blade portion 12 and the second blade portion 22 each have a set of restricting portions 30, 34, and each of the restricting portions 30, 34 extends through the portions of the first and second blade portions 12, 22 adjacent to the cutting edges 14, 24. And through the shear faces 13, 23 and the front bevels 15, 25 and the abutment faces 16, 26.

In the embodiment, the restricting portions 30, 34 are grooves (or notches), and are recessed from the cutting edges 14, 24 toward the inclined surfaces 17, 27 into the first and second cutting portions 12, 22, so that the grooves ( That is, the walls 32, 36 of the restricting portions 30, 34) are substantially perpendicular to the shear faces 13, 23. The opening of the recess interrupts the continuity of the length extension of the cutting edges 14, 24, and the groove openings of the first blade portion 12 and the second blade portion 22 face each other. Even if the openings of the grooves are staggered from each other, the functions of the restricting portions 30, 34 are not lowered.

In some embodiments, the restriction portions 30, 34 pass through the shear faces 13, 23 and the front bevels 15, 25, which are also a good choice. Of course, the restricting portion 30 may also be a hole such as a circular hole or an elliptical hole. Moreover, the angle at which the wall of the hole (i.e., the restricting portion 30) is perpendicular or inclined to the shear faces 13, 23 is also within the permissible range of the present creation.

In terms of use, the restricting portion 30 houses the wire member 42 (or a metal round bar) that is blocked by the restricting portion 30 and is not allowed to be arbitrarily displaced or slid along the longitudinal direction of the first blade portion 12.

When the two cutting edges 14, 24 (or the metal shears) are staggered in opposite directions, the wire 42 and the object to be cut 40 (that is, the plate or sheet made of metal) are simultaneously cut by the two cutting edges 14 and 24 into a cutting portion 44 or A segment 46 is cut off. Therefore, the shearing tool of the present invention saves the operation sequence of “changing the working part or position” compared with the conventional tin shear, and the time is reduced, and the use is more convenient.

When the wire 42 is individually cut by the cutter, the restricting portions 30, 34 are enclosed around the outside of the wire member 42, and the wire member 42 is prevented from being arbitrarily displaced or slid along the longitudinal direction of the first and second blade portions 12, 22, straight. The wire 42 is cut by the two shear faces 13, 23.

Next, see the sixth to eighth figures, the structure of the second embodiment of the cutting tool is substantially the same as that of the first embodiment, the difference is that, firstly, two diamond layers 31 are added, and the diamond layer 31 protrudes from the first The front bevels 15, 25 of the second blade portions 12, 22 are adjacent to the cutting edges 14, 24. The diamond layer 31 uses a metal oxidant as a catalyst to bond the series of diamond grains 35 to the first and second blades 12, 22 to form a composite material.

The metal oxidants referred to herein are, for example, copper oxide, cerium oxide, manganese dioxide, aluminum oxide, boron trioxide, chromium trioxide, ferric oxide, triiron tetroxide and lead tetraoxide. .

The diamond grain 35 referred to herein has a hardness of 10 to the Mo. For example, the cut object is a stainless steel sheet having a Mohs hardness of 5.5, and the shearing device is provided with a harder diamond layer 31, so that the stainless steel sheet can be easily cut or cut.

Next, each of the restricting portions 30, 34 has a layer of diamond wall 33. By the above-mentioned metal oxidation catalyst method, the series of diamond crystal grains 35 are combined in the walls 32 and 36 of the groove, and a diamond wall surface 33 can also be arranged in the restricting portions 30 and 34, which has the effect of improving and strengthening the shearing function.

Claims (9)

An improved shearing structure, comprising: a first blade portion and a second blade portion connected to each other to move back and forth between an open position and a closed position, wherein the first blade portion and the second blade portion each have a blade edge These blades are staggered; a restricting portion that extends through a portion of the two blades adjacent to the blade. The improvement of the cutter structure according to claim 1, wherein the restriction portion is one of a groove and a hole. The improved structure of the cutting tool according to claim 2, wherein the first blade portion and the second blade portion each have a shearing surface and a front beveling surface, and each cutting edge refers to abutting of the shearing surface and the front beveling surface. The restriction portion passes through the shearing surface and the front slope. The improved structure of the cutting tool according to the third aspect of the invention, wherein the first blade portion and the second blade portion each have an abutting surface, the abutting surface connecting the front bevel surface and a blade back 99, the blade back 99 and the cutting The surface is on both sides of the blade; the restriction portion cuts the front bevel and the abutment surface. The improvement of the cutter structure according to claim 3, wherein the wall of the restriction portion is perpendicular to the shear plane. The improvement of the cutter structure according to claim 4, wherein the wall of the restriction portion is perpendicular to the shear plane. The improvement of the clip structure according to claim 3, further comprising: a two-diamond layer protruding from the front bevel of the first second blade portion adjacent to the blade edge. The improvement of the clip structure according to claim 7, wherein the diamond layer is combined with the first and second knife portions into a composite material by using a metal oxidant as a catalyst. The improvement of the structure of the cutting tool according to claim 3, wherein the restriction portion has a diamond wall.