JPH04215787A - Cutter - Google Patents

Abstract

PURPOSE:To reduce the load of a worker by forming an edge opened forward into a V-shape at the end of a tip section. CONSTITUTION:The end 15C of a height adjusting pin 15 and the portion of the bottom face of an edge section 9 near a tip 11 are brought into contact with the face of a printed circuit board 17 where a lead wire 18 is protruded, and the edge section 9 is advanced toward the lead wire 18 in this attitude so that the lead wire 18 relatively enters an edge 13 opened into a V-shape. When the lead wire 18 touches the depth of the edge 13, i.e., the bend point of the V-shape, the edge 13 is relatively pressed by the lead wire 18, and the steel ball 6 of a reciprocating shaft 4 is brought into contact with the cam face 8 of a drive shaft 7. The edge 13 can press-cut the lead wire 18. The work is simplified, and the physical load applied to a worker can be reduced.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a novel cutter.
In particular, the present invention relates to a cutter suitable for cutting off excess lead wires of mounted electronic components during the manufacture of printed circuit boards.

0002

2. Description of the Related Art In the manufacture of printed circuit boards, it is necessary to cut off the excess lead wires of mounted electronic components after they are soldered.

[0003] If the printed circuit board is manufactured in large quantities, the above-mentioned cutting of the excess lead wire is performed by a fully automatic machine following the steps of inserting and soldering electronic components. When printed circuit boards are only produced in small quantities, they are actually cut out manually using a tool such as nippers.

[0004] However, when cutting a lead wire using nippers, (1) first, the space between the nipper blades is opened, and (2)
Positioning the lead wire to be cut between the blades, (3)
Next, multiple operations in different directions, such as closing the space between the blades, must be performed in combination, resulting in poor work efficiency and, furthermore, the burden on the worker is too great, leading to tendonitis. It is not uncommon for such failures to occur.

[0005]

[Problems to be Solved by the Invention] The problem to be solved by the present invention is that manual cutting of the wire is complicated;
Another problem is that the physical burden on the worker is excessive.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the cutter of the present invention has a blade opening in a V-shape toward the front at the cutting edge of the blade portion.

[0007]

[Operation] Therefore, in the cutter of the present invention, if the blade is attached to the output end of the drive part and the tip of the blade is advanced toward the cutting location of the wire material to be cut, the V of the blade The cut portion of the wire material relatively enters into the letter-shaped blade, and the blade pushes the cut portion.

[0008] Therefore, the operation is a simple one of pushing the tip of the blade toward the cutting point of the wire, and has the advantage that the physical burden placed on the operator is light.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the cutter of the present invention will be explained below according to the embodiments shown in the attached drawings.

The cutter 1 of the present invention includes a drive section that outputs rotational input as reciprocating motion, and a blade section that is detachably attached to the output end of the drive section.

2 is a driving section. The drive unit 2 is made in 1973.
Since it is similar to that shown in Publication No. 2-36318, only the outline thereof will be shown in this specification, and the detailed description will be left to the above publication.

Reference numeral 3 designates the outer casing of the drive unit 2, which is cylindrical in its entirety and has holes penetrating it from front to back.

Reference numeral 4 denotes a reciprocating shaft, which is supported in the front half of the outer casing 3 so as to be able to slide freely within a certain range in the front and back direction, but not rotate. A collet chuck 5 is fixed to the protruding tip.

Reference numeral 6 denotes a steel ball, about half of which is rotatably inserted into a conical recess 4a formed on the rear end surface of the reciprocating shaft 4.

Reference numeral 7 denotes a drive shaft, which is supported in the rear half of the outer casing 3 so as to be rotatable but not movable in the front-back direction.

The central axis of the drive shaft 7 and the central axis of the reciprocating shaft 4 are eccentric to each other.

Reference numeral 8 denotes a cam surface provided at the front end of the drive shaft 7, and is a surface inclined with respect to the axial direction of the reciprocating shaft 4 and the drive shaft 7. A portion of the cam surface 8 that is off the center faces the steel ball 6 from behind.

A flexible shaft (not shown) is connected to the rear end 7a of the drive shaft 7.

[0019] When the flexible shaft is rotated by a suitable drive source, for example, a motor, the drive shaft 7
is rotated, and therefore, the portion of the cam surface 8 provided at the front end of the drive shaft 7 that faces the steel ball 6 changes back and forth. Therefore, when a pressing force is applied to the reciprocating shaft 4 to move it rearward, the steel ball 6 supported at the rear end is displaced back and forth in accordance with the displacement of the cam surface 8 in contact with the steel ball 6. This causes the reciprocating shaft 4 to reciprocate in the front and back direction.

Reference numeral 9 denotes a blade portion, which includes an intermediate portion 10 that is curved into a hollow shape when viewed from the side, a cutting edge portion 11 continuous to the tip of the intermediate portion 10, and a mounting portion 12 continuous to the rear end of the intermediate portion 10. The attachment portion 12 is detachably attached to the collet chuck 5 of the drive portion 2.

A blade 13 that opens forward in a V-shape is formed at the tip edge of the cutting edge portion 11 .

Reference numerals 14 and 14 are screw holes formed in the intermediate portion 10, and are arranged side by side on the left and right.

Reference numerals 15 and 15 indicate height adjustment pins, which are integrally formed with screw shaft portions 15a and heads 15b provided at the base ends of the screw shaft portions 15a and 15a,
The screw shaft portions 15a, 15a are screwed into the screw holes 14, 14 of the blade portion 9 from above, and the tip portions 15c, 15c are screwed into the screw holes 14, 14 of the blade portion 9.
It protrudes toward the bottom side.

Reference numerals 16 and 16 designate the blade portion 9 and head portions 15b and 15b of the screw shaft portions 15a and 15a of the height adjustment pins 15 and 15, respectively.
This is a locking nut that is screwed onto the part located between the

Next, the use of the cutter 1 will be explained.

The tips 15c, 15c of the height adjustment pins 15, 15 are brought into contact with the bottom surface of the blade portion 9, which is closer to the cutting edge, on the surface 17a of the printed circuit board 17 on which the lead wire 18 protrudes ( (See FIGS. 5(a) and 5(b)). This stabilizes the posture of the blade portion 9.

Therefore, the blade portion 9 is moved forward toward the lead wire 18 while maintaining the above-mentioned posture, so that the lead wire 18 becomes V.
It is made to relatively fit into the blade 13 which is opened in a character shape. Then, when the lead wire 18 comes into contact with the back 13a of the blade 13, that is, the V-shaped bending point, the blade 13 is relatively connected to the lead wire 1.
8, the steel ball 6 of the reciprocating shaft 4 comes into contact with the cam surface 8 of the drive shaft 7. Therefore, the blade 13 is connected to the lead wire 18.
You will have to push through.

As described above, according to the cutter 1, the lead wire 18 can be cut by simply pushing the cutting edge of the blade portion 9 toward the lead wire 18. Moreover, the blade 13 is V
Because the lead wire 18 and the blade part 9 are opened in a letter shape, the lead wire 18 can be opened by simply pushing the cutting edge of the blade part 9 toward the lead wire 18, without having to align the positions of the lead wire 18 and the blade part 9 very closely. It is introduced toward the back 13a of the blade 13.

The cutting length of the lead wire 18 can be adjusted by adjusting the amount of protrusion of the height adjustment pins 15, 15.

That is, as shown in FIG. 5(a), if the protruding amount of the height adjustment pins 15, 15 is increased, the cutting edge portion 11 approaches the substrate surface 17a, and the remaining lead wire 18 after cutting is shortened. As shown in FIG. 5(b), by reducing the amount of protrusion of the height adjustment pins 15, 15, the blade edge portion 11 can be
is largely raised from the substrate surface 17a, making it possible to lengthen the remaining lead wire 18 after cutting. In addition, after adjusting the protrusion amount of the height adjustment pins 15, 15, if the locking nuts 16, 16 are tightened against the upper surface of the blade part 9, the protrusion amount of the height adjustment pins 15, 15 after adjustment will be incorrect. There is no.

FIGS. 6 and 7 show a modification 9A of the blade portion.

The blade portion 9A has a plurality of blades 13, 13 that open forward in a V-shape at the tip of the blade edge portion 11.
, 13 are formed side by side on the left and right.

If such a blade portion 9A is used, there is no need to take extra care in positioning the blade edge during cutting.

[0034]

Effects of the Invention As is clear from the above description, the cutter of the present invention comprises a drive section that outputs input rotation as reciprocating motion, and a blade section that is detachably attached to the output end of the drive section. The blade part has a slightly curved intermediate part in between, and the cutting edge part and the mounting part are integrally formed, and the tip of the cutting edge part has a V-shaped blade that opens toward the front. It is characterized by

Therefore, in the cutter of the present invention, when the blade is attached to the output end of the drive unit and the tip of the blade is advanced toward the cutting location of the wire to be cut, the V of the blade is The cutting point of the wire rod is relatively inserted into the letter-shaped blade,
The blade will push through the cutting location. Therefore, the operation is a simple one of pushing the tip of the blade toward the cutting point of the wire, and has the advantage that the physical burden on the operator is light.

In the description of the above embodiments, the case where the cutter of the present invention is used to cut off the excess portion of the lead wire after soldering on a printed circuit board was explained, but the cutter of the present invention is not intended to be used in such a case. The cutter of the present invention is suitable for a wide range of uses for cutting wire rods.

[0037] Furthermore, the drive unit in the cutter of the present invention is
The present invention is not limited to those shown in the above embodiments, but any type that outputs rotational input as reciprocating motion may be used.

In addition, the specific shapes and structures shown in the above embodiments are merely examples of embodiments of the present invention, and the technical scope of the present invention is limited by these. shall not be construed as such.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how the cutter of the present invention is used.

FIG. 2 is a longitudinal sectional view of the cutter.

FIG. 3 is an enlarged plan view of the blade portion.

FIG. 4 is an enlarged side view of the blade.

FIG. 5(a) is a side view showing the state of use.

FIG. 5(b) is a side view showing another state of use.

FIG. 6 is an enlarged plan view showing a modification of the blade portion.

FIG. 7 is an enlarged side view showing a modification of the blade portion.

[Explanation of symbols]

1 Cutter 2 Drive part 5 Output end 9 Blade part 10 Middle part 11　Blade tip part 12 Mounting part 13 Blade 9A Blade part

Claims (2)

[Claims] Claim 1: Consisting of a drive section that outputs input rotation as reciprocating motion, and a blade section that is detachably attached to the output end of the drive section, the blade section has a slightly curved middle section between which the cutting edge is connected. A cutter characterized in that the part and the mounting part are integrally formed, and a blade opening in a V-shape toward the front is formed at the tip of the cutting edge part. 2. The cutter according to claim 1, characterized in that a plurality of V-shaped blades are formed side by side.