JPH0541131U - Lead wire cutting device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The blade edge of the cutter 3 is always self-polished, the sharpness of the blade edge is maintained for a long time, and at the same time, the contact with the guide surface 12 of the lead guide 5 is achieved. [Structure] The cutter 3 is reciprocally driven along the end surface 12 of the lead guide 5 while the back surface of the cutting edge of the cutter 3 is brought into contact with the guide surface 12 of the lead guide 5 having a through hole 10 for inserting the lead wire 7. In this case, the elasticity of the spring 14 presses the blade edge of the cutter 3 against the guide surface 12 of the lead guide 5. As a result, the cutting edge of the cutter 3 is polished by the guide surface 12 of the lead guide 5 as the cutter 3 reciprocates.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lead wire cutting device suitable for continuously cutting lead wires of electronic parts and the like.

[0002]

[Prior Art]

 A conventional lead wire cutting device is shown in FIGS. 2 and 3, and will be described below with reference to the drawings. In these figures, the fixed sliding part receiver 1 is provided with a dovetail groove guide 4, and the sliding part 2 is guided by the dovetail groove guide 4 and periodically in the direction of the arrow in FIG. It is slid back and forth. Further, a cutter 3 for cutting the lead wire 7 is fixed to the tip of the sliding portion 2 by a bolt 8. Although the sliding portion 2 is not shown in the figure, for example, a general technique is used that converts the rotational force of the prime mover into a linear motion via a cam mechanism.

On the other hand, the lead guide mounting base 6 has a lead guide 5 embedded in its tip, and the lead guide 5 is fixed by a lead guide stopper 9. At the center of the lead guide 5, there is formed a through hole 10 which also communicates with the lead guide mounting base 6, and the lead wire 7 is inserted into the through hole 10. Further, the back surface 11 of the cutter 3 is in contact with the end surface 12 of the lead guide 5, and the lead wire 7 is cut by reciprocating the sliding portion 2. The length of the lead wire 7 to be cut is, for example, when the cutter 3 moves upward in the drawing, the lead wire 7 is sent out by a lead sending device (not shown), and it depends on the length of the lead wire 7 at that time. It is determined.

[0004]

[Problems that the device is trying to solve]

 However, in the conventional lead wire cutting device, as described above, the cutter 3 is fixed by the sliding portion 2 guided by the dovetail groove guide 4 of the fixed sliding portion receiver 1, so that the cutter 3 is fixed. The rear surface 11 of the is fixed so as to slightly contact the end surface 12 of the lead guide 5. Strictly speaking, however, there is a small gap between the back surface 11 of the tip of the cutter 3 and the end surface 12 of the lead guide 5. In this state, when the cutter 3 is reciprocated and the lead wire 7 is repeatedly cut, the cutting edge gradually wears and its shearing ability becomes dull. As a result, there is a problem that burrs are generated at the cut ends of the lead wires 7 to be cut. In addition, if it continues for a long time, in addition to the wear of the tip of the cutter 3, the gap between the blade edge of the cutter 3 and the guide surface 5 gradually widens, and the fixed portion of the sliding portion support 1 is deformed, which causes the above-mentioned burr. The frequency of occurrence increases, and in some cases the problem of inability to cut occurs. Therefore, it is necessary to make long-term adjustments, such as fine adjustment between the back of the blade and the end surface of the tip of the lead guide when replacing the cutter, and readjustment of each fixing part regularly or at any time, increasing the number of cutter replacements. In addition, the work efficiency at the time of replacement was a problem.

The present invention has been made to solve the above problems, and the purpose thereof is that the back surface of the cutting edge of the cutter constantly presses the end surface of the lead guide, whereby the cutting edge is always ground so that the cutting edge An object is to provide a lead wire cutting device in which the sharpness of the cutting edge is maintained for a long time.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a lead guide 5 having a through hole 10 through which a lead wire 7 is inserted, and a cutting edge so that the back surface presses an end face 12 of the lead guide 5 where the through hole 10 opens. In a lead wire cutting device having a cutter 3 to which a blade is applied and a drive mechanism 13 that reciprocally drives the cutting edge of the cutter 3 along the end face 12 of the lead guide 5, an elastic body 14 is attached to the cutter 3. The lead wire cutting device is characterized in that the elastic force of the elastic body 14 is urged in a direction in which the cutting edge of the cutter 3 is pressed against the end surface 12 of the lead guide 5.

[0007]

In the lead wire cutting device according to the present invention, since the back side of the cutting edge of the cutter 3 is pressed against the end surface 12 of the lead guide 5 by the elastic body 13, the cutting edge between the cutting edge of the cutter 3 and the end surface 12 of the lead guide 5 is cut. There is no gap in Further, since the back side of the cutting edge of the cutter 3 slides on the end surface 12 of the lead guide 5, the end surface 12 of the lead guide 5 and the cutting edge of the cutter 3 are constantly polished, so that no burr occurs when cutting the lead wire 7. Not only is the flatness of the end surface 12 of the lead guide 5, the sharpness of the cutting edge of the cutter 3, and the adhesion between the end surface 12 of the lead guide 5 and the cutting edge of the cutter 3 maintained.

[0008]

【Example】

 One embodiment of the present invention is shown in FIG. 1 and will be described below with reference to the drawings. In FIG. 1, the same reference numerals as those in FIG. 2 for explaining the prior art indicate the parts having the same functions. That is, the sliding portion receiver 1 is formed with a dovetail groove 4, and the sliding portion 2 is formed with a dovetail groove guide 4 ′ that can be reciprocally slid in the direction of the arrow by the dovetail groove 4. The power source for driving the sliding portion 2 is driven by the drive mechanism 13 having the structure described in the related art. Further, a cutter base 15 is provided at one end of the sliding portion 2 and is formed so as to be rotatable around a rotary shaft 16. The cutter base 15 has the cutter 3 fixed thereto by bolts 8. Therefore, the cutter 3 can also rotate around the rotary shaft 16 together with the cutter base 15. Further, the sliding portion 2 and the cutter base 15 are respectively provided with elastic body support fittings 17 and 17 ', and the elastic body 14 is provided between the both fittings 17 and 17'. Therefore, the cutter 3 is acted on by the elastic body 14 in the direction of arrow A in FIG.

On the other hand, the lead guide mounting base 6 side has the same structure as that of the prior art, and the lead guide mounting base 6 has a lead guide 5 embedded at the tip thereof, and the lead guide 5 has a lead guide stopper metal fitting 9 Is fixed by. A through hole 10 is formed in the center of the lead guide 5 so as to communicate with the lead guide mounting base 6, and a lead wire 7 is inserted into the through hole 10.

With the above configuration, the back side of the tip of the cutter 3 is constantly pressed against the end surface 12 of the lead guide 5 by the action of the elastic body 14 described above. Then, due to the driving force from the driving mechanism 13, the cutter 3 repeatedly performs the reciprocating sliding operation while pressing the end surface 12 of the lead guide 5. Therefore, there is no gap between the cutting edge of the cutter 3 and the end surface 12 of the lead guide 5, and the end surface 12 of the lead guide 5 and the cutting edge of the cutter 3 are constantly ground, so that the end surface 12 of the lead guide 5 is flat. And the sharpness of the cutting edge of the cutter 3 are always maintained. This not only eliminates the burrs on the cut surface of the lead wire that occurs when cutting the lead wire, but also reduces the wear of the cutting edge of the cutter 3 as seen in a conventional device that does not have a polishing action. The frequency of cutter replacement is reduced. Further, fine adjustment of the gap between the cutting edge of the cutter 3 and the end surface 12 of the lead guide 5, which is seen in the conventional device, becomes unnecessary, and simply adjusting the parallelism between the cutting edge of the cutter 3 and the end surface 12 of the lead guide 5. Good. Therefore, the adjustment work at the time of exchanging the cutter is significantly simplified.

[0011]

[Effect of the device]

 As described above, according to the lead wire cutting device of the present invention, since the blade edge of the cutter is biased toward the end surface of the lead guide by the elastic body, the blade edge of the cutter is always kept in the cutting process of the lead wire. Since it is ground, the sharpness of the cutting edge is always maintained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a lead wire cutting device according to the present invention.

FIG. 2 is a configuration diagram of a conventional lead wire cutting device.

FIG. 3 is a view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sliding portion receiving 2 Sliding portion 3 Cutter 4'Dovetail groove guide 5 Lead guide 7 Lead wire 10 Through hole 12 End face 13 Drive mechanism 14 Elastic body 15 Cutter stand 16 Rotating shaft

Claims (1)

[Reference number] 0030376-01 [Claims for utility model registration] 1. A lead guide having a through hole through which a lead wire is inserted, a cutter having a cutting edge abutted against the end face of the lead guide where the through hole opens, and a cutting edge of the cutter. In a lead wire cutting device having a drive mechanism that is reciprocally driven along the end face of
A lead wire cutting device, wherein an elastic body is engaged with the cutter, and the elastic force of the elastic body is urged in a direction in which a blade edge of the cutter is pressed against an end surface of the lead guide.