JPH01278930A - Lead cutter - Google Patents

Abstract

PURPOSE:To guide and lead by a V-groove by forming an obtuse angle between a 1st side surface and a 1st main surface of a 1st cutter and allowing a 2nd main surface and a 2nd side surface of a 2nd cutter to form a supplementary angle or an acute angle to this obtuse angle and providing V-grooves in acute angle parts of the 2nd cutter. CONSTITUTION:An obtuse angle is given between the 1st side surface 14 and the 1st main surface 11 of the 1st cutter 10 and the 2nd main surface 13 and the 2nd side surface 16 of the 2nd cutter 12 form an acute angle making a supplementary angle to this obtuse angle. In the 2nd cutter, three V-grooves 18, 20, 22 are provided at a right angle to an intersecting line made by the 2nd main surface 13 and the 2nd side surface 16. Since the 2nd side surface 16 takes an acute angle to the 2nd main surface 13, recess parts 24, 26, 28 look to be formed from the 2nd main surface side. Since lead is guided in the roots of these recesses, a guiding means for the lead is not required. Further, similar V-grooves 30, 32, 34 can be provided to a 3rd main surface 29 facing the 2nd main surface on both sides of each V-groove.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lead cutter, and more particularly to the shape of a single cutter for cutting leads of electronic components mounted on circuit boards used in electronic devices and the like.

[Prior Art] Many of the circuits of electronic devices are constructed by inserting or attaching various electronic components to a circuit board, soldering them, and electrically connecting them to conductive paths provided on the circuit board. . Many electronic components have leads (wire-like conductive paths), and for these, the leads are inserted into insertion holes prepared in advance on the circuit board, flow soldered, and mounted on the circuit board. There is. Various attempts have been made to mechanize and automate the insertion of electronic components having leads into circuit boards depending on the type and shape of the electronic component. The main points to be promoted in mechanical insertion are (1) increasing the insertion success rate, (2) increasing the mounting density, and (3) increasing the types of electronic components that can be targeted. It will be done. The present invention is related to (1) increasing the success rate of insertion.

One way to increase the success rate of insertion is to make the tips of the leads of the electronic components to be inserted sharp. In order to do this, we have devised the shape of the blade used to cut the leads of each electronic component and separate it from the tape, such as when electronic components are adhered side by side to the tape. FIG. 5 shows an embodiment of the "electronic component lead wire cutting device" disclosed in Japanese Patent Laid-Open No. 61-216400.

In the device disclosed in this publication, an IJ-board of an electronic component is supported by a guide plate 50, and the tip of a lead wire 90 is cut into a tapered shape by a conical cutting cutter 60.

[Problems to be Solved by the Invention] In the conventional example described above, the cutter 60 is only shown to cut the lead into a conical shape.

Furthermore, during cutting, the guide plate must position the electronic component. In the above-mentioned conventional example, the cutter is considered to have a conical hole from the drawings in the specification in which the invention is disclosed, but this may be replaced with a pyramidal hole.

6 is an enlarged plan view showing what is considered to be an example of the shape of the lead cutter 60 in FIG. 5, and FIG. 7 is a perspective view of the cutter shown in FIG. 6.

In such a cutter, the tip of the lead can be made into a pyramid, but some kind of positioning or guiding means is still required to guide the lead to the center of the groove of the cutter. Furthermore, since cutters of the same shape are used in pairs, the two cutters must be precisely aligned with each other.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lead cutter that has the function of guiding a lead to be cut by the cutter.

Another object of the present invention is to provide a lead cutter that does not require strict alignment of the two cutter pieces with respect to each other.

Still another object of the present invention is to provide a lead cutter that is simple in shape and easy to manufacture.

[Means for Solving the Problem] The lead cutter of the present invention includes a first cutter having a substantially flat plate shape and a second cutter also having a substantially flat plate shape. and the first
The first side of the cutter and the second side of the second cutter are butted against each other to cut the lead.

The first side surface of the first cutter forms an inclined surface with respect to the main surface of the flat plate. The second side surface of the second cutter is a slope that comes into close contact with the slope of the first side surface when the first cutter and the side surface are butted against each other. Furthermore, the second cutter is provided with a 7-shaped groove extending approximately perpendicular to the line of intersection between the main surface and the side surface on the edge of the side surface where the angle between this side surface and one of the main surfaces is an acute angle. be. The number of these 7-shaped grooves may be any number.

[Operation] Since the second side surface of the 7-shaped groove provided in the second cutter is not perpendicular to the main surface of the second cutter, a 7-shaped recess is formed when viewed from a direction perpendicular to the main surface.

This recess guides the lead to be cut. The guided lead is sandwiched between the first side of the first cutter and the second side of the second cutter to cut the lead. The cut end is sharp and has a shape similar to a triangular pyramid.

[Example] FIG. 1 is a schematic perspective view of a second cutter of the lead cutter according to the present invention, and FIG. 2 is a plan view of the first cutter and the second cutter of the lead cutter device according to the present invention. FIG. 3 is a front view seen from arrow A in FIG. 1.

As shown in these figures, especially in FIG. 2, the first cutter 10
Both the second cutter 12 and the second cutter 12 have substantially planar shapes. 1st
The cutter 10 and the second cutter 12 have respective main surfaces (11, 1
3) are installed parallel to each other, and the first side surface 14 of the first cutter and the second side surface 16 of the second cutter are also parallel.

Therefore, when the first cutter 10 and the second cutter 12 advance parallel to their main surfaces and the first side surface and the second side surface abut each other, these side surfaces come into close contact with each other.

In the embodiment of the present invention, the second cutter has three V-shaped grooves 18, 20 perpendicular to the intersection line of the second main surface 13 and the second side surface 16.
, 22 are provided. The second side surface 16 is the second main surface 1
As shown in FIG. 2(b), when viewed from the second main surface side, the recesses 24.26.2
8 is formed. Because the recess is formed in this way,
The lead is now guided to the valley of the recess, thus eliminating the need for separate lead guiding means.

As already mentioned, in the lead cutter of the present invention, one side (the first cutter) is butted against the other side (the first side 1).
4) is simply a plane, and therefore,
Not only is this cutter easy to manufacture, but the positioning of the first cutter and the second cutter does not require great precision.

In the embodiment of the present invention, three 7-shaped grooves are provided on the second main surface side of the second cutter, but in order to improve the sharpness of the cutter, the second main surface The third principal surface 29 has a couplet:
Similar V-shaped grooves 30, 32, 34, 3G may be provided. By providing such a 7-shaped groove, the second main surface 13
The edge on the second side surface formed by the three figure 7 grooves provided on the side and the four figure 7 grooves provided on the third main surface 29 side meeting on the second side surface is sharp. The sharpness of the reed is the same as above. In addition, the first cutter and the second cutter are not basically butted against each other on a plane perpendicular to the direction of movement, so when they are butted together, the first cutter is There is a possibility that the second cuff shifts in the direction of arrow C shown in FIG. 2(d). To prevent this, the first cutter has protruding first shoulders 38 on both sides of the first side surface 14.
．． 40 on both ends of the second side surface 16 of the second cutter.
The second part is shaped so as to place the shoulder part 38.40 from below.
R sections 42 and 44 may be provided respectively.

FIG. 4 shows the tip of a lead cut by the cutter of the lead cutter device of the present invention. As shown in the figure, the tip of the lead has a shape relatively similar to a triangular pyramid.

[Effects of the Invention] The cutter used in the lead cutter device of the present invention has a side surface on which a pair of cutters are brought into contact with each other, which forms an inclined surface with respect to the main surface of the plate-shaped cutter, and a V-groove provided on the side surface. Since the 7-shaped cut formed at the end forms a recess when viewed from the main surface direction, the lead to be cut is guided into this recess.

Therefore, no separate lead guiding means is required. Furthermore, since one side of the pair of cutters of the present invention is a simple plane, the mutual alignment of the two cutters is not required to be precise, and manufacturing is easy and inexpensive.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view of the second cutter of the lead cutter according to the present invention, FIG. 2 is a plan view and side view of the lead cutter according to the present invention, and FIG. , a front view of the lead cutter shown in FIG. 1 as seen from arrow A in FIG. 1, FIG.
6 is a perspective view of a conventional lead cutter device, FIG. 6 is a plan view of a conventional lead cutter, and FIG. 7 is a perspective view of one of the lead cutters shown in FIG. 6. In these figures, 10 is the first cutter, 12 is the second cutter, and 18, 20, and 22 are the 7-shaped grooves. Patent applicant: Sony Tektronix Corporation ψ

Claims (1)

[Scope of Claims] A first principal surface of a first cutter having a substantially flat plate shape and a second principal surface of a second cutter having a substantially flat plate shape are arranged so as to face the same direction, In a lead cutter that performs lead cutting by abutting a first side surface and a second side surface of the second cutter, the first side surface of the first cutter and the first main surface are formed to form an obtuse angle, and The second main surface and the second side surface of the second cutter are formed to form an acute angle that is a supplementary angle with the obtuse angle, and the second side surface and the second main surface are formed at the acute angle portion of the second cutter. A lead cutter characterized by having a V-shaped groove extending substantially perpendicular to a line of intersection with the lead cutter.