JPH0310720Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lead wire shaping device that shapes the end portion of a lead wire of an electronic component.

(Prior art) When attaching electronic components such as resistors, capacitors, diodes, etc. to a printed circuit board, in the case of an axial lead type in which lead wires are drawn out from both ends of the electronic component, transparent wires formed in the wiring pattern of the printed circuit board are used. Both ends of a lead wire that has been shaped to a predetermined length are inserted into the hole and soldered. Normally, this lead wire shaping process involves cutting both ends of the lead wire to a predetermined length, and then bending both ends to match the width of the through hole in the printed circuit board (Figure 9). Although required, in the case of mass production, an automatic tower machine that fully automates the transfer of electronic parts, cutting and bending of lead wires is used. but,
When the production volume is relatively small, ranging from tens to hundreds, or when it is not suitable for mass production, a handy type lead wire shaping device as shown in FIG. 6 is often used.

As shown in FIGS. 6 and 7, this lead wire shaping device has a base plate 13 with a pair of left and right side panels 1 and 2, and a main shaft 3 is pivotally supported between the two side panels. Guide shafts 4 are arranged in parallel. A pair of cutting gears 5 and 6 are fitted coaxially with the main shaft 3, and bending gears 7 and 8 are fitted inside both gears. Further, a pair of cutters 9 and 10 are attached to the same axis of the guide shaft 4 so as to face the cutting gears 5 and 6, and a pair of bending members is attached to the same axis as opposed to the bending gears 7 and 8. is installed. Note that the cutting gear 5 and the bending gear 7
As shown in FIG. 7, the tooth grooves 5b and 7b have approximately the same shape on the same axis. Then, a cutter 9 is brought into contact with the inside of each of the cutting gears 5 and 6, and its cutting edge 9a is positioned at the depth of the groove bottoms 7d and 8d of the bending gears 7 and 8, while the bending gears 7, The structure has a booth 〓 on the periphery of 8, and a bending member is positioned there.

By the way, when shaping the lead wire B of the electronic component A using this shaping device, first position the cutters 9 and 10, the bending member, and each gear to a predetermined width in accordance with the wiring pattern of the printed circuit board, etc. . Then, the lead wire B of the electronic component A is connected to each tooth 5a, 6 of the cutting gears 5, 6 and the bending gears 7, 8.
The handle 16 is placed between a, 7a, and 8a.
When the lead wire B is rotated, both ends of the lead wire B are cut to a predetermined length by the cutters 9 and 10. Furthermore, when this lead wire B is sent into the booth between the bending gears 7 and 8 and the bending member, both ends are bent by the bending member to a desired angle (right angle), so that it can be mounted on a printed circuit board. It is shaped into an electronic component.

(Problems to be solved by the invention) However, this type of lead wire shaping device
The tooth grooves 5b to 8b of the cutting gears 5, 6 and the bending gears 7, 8 have the same shape on the same axis, and the cutting edges 9a, 10 of the cutters 9, 10
Since it is necessary to position a a little closer to the center than the bottom of the cutting gear, connect the lead wires to the cutters 9 and 10.
When cutting the lead wire B, there was a problem that the tip of the lead wire B was bent as shown in FIG. That is, when the shearing force of the cutters 9 and 10 is applied to the lead wire B placed on each tooth 5 to 8 of the cutting gears 5 and 6 and the bending gears 7 and 8, the lead wire is cut. Since the cutting edges 9a and 10a of the cutters 9 and 10 are located a little closer to the center than the bottom of the cutting gear, the tip of the lead wire rides on the inner surface of the cutter.
The lead wire was sometimes deformed by the cutter. If the tip of the lead wire B is bent at right angles with even a slight bend in the tip, both ends of the lead wire B will be formed to a width different from the specified width, which may cause problems in through-holes in wiring patterns, etc. There was a problem where incompatible electronic parts were manufactured. For this reason, it becomes necessary to manually correct the lead wire B which has been deformed while being bent, which makes the work extremely cumbersome and significantly reduces the processing efficiency.

In view of the above problems, the present invention aims to improve the efficiency of shaping the lead wire by preventing deformation of both ends of the lead wire of an electronic component during cutting.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides that a main shaft is pivotally supported between a pair of side panels arranged at a predetermined interval, and that the main shaft is A guide shaft is arranged in parallel near the shaft, and a pair of cutting gears are fitted coaxially with the main shaft, and a bending gear is fitted inside the cutting gear. and each tooth of the cutting gear is arranged on the same axis, a pair of cutters and a pair of bending members are respectively attached to the guide shaft, and the cutter is in contact with the inner surface of the cutting gear. In a lead wire shaping device in which the cutting edge is made to look at the tooth bottom position of the cutting gear, and a bending member is arranged at the tooth bottom position of the bending gear, the tooth bottom part of the bending gear is It is characterized by a deep groove that is deeper toward the center than the bottom of the tooth of the gear.

(Function) When the lead wire of an electronic component is placed between the teeth of the cutting gear and the bending gear and sent to the cutter side, both ends of the lead wire are placed between the cutting gear and the cutter for a predetermined length. It is severed immediately. At this time, by forming a deep groove in the bending gear, the lead wire falls into the deep groove after cutting, and bending due to the cutter is avoided. This point is shown in Figure 5 a, b,
This will be explained with reference to c and d. Figure 5a shows the state before the lead wire is cut, with a straight lead wire B being inserted between the teeth 5a and 7a of the cutting gear 5 (see Figure 5d) and the bending gear 7. It is installed. When the cutting gear 5 is rotated in the direction of arrow C, the lead wire B is sent to the cutter 9 side.

When the lead wire B moves in the direction in which it comes into contact with the blade of the cutter 9, the end portion is cut by the cutter 9.

At this time, if the lead wire B does not change its radial position, the tip of the lead wire will ride on the cutter, but as shown in Figure 5 c and d, Since the tooth bottom of the bending gear 7 that supports the lead wire is formed in a deep groove portion deeper than the tooth bottom of the cutting gear 5, the lead wire B is moved toward the center of the cutting gear 5 by the cutter 9 as it is cut. As soon as the lead wire on the electronic component A side is cut by the component force, the lead wire on the electronic component A side is cut into the deep groove part 7c of the bending gear 7.
fall inside.

As a result, even if the cutting gear 5 and the bending gear 7 rotate in the direction of arrow C thereafter, the lead wire B is prevented from riding on the inner surface of the cutter 9, and the tip of the lead wire B is not bent. As a result, the lead wire is fed into the bending gear and the bending member while being kept straight, and both ends are bent by the bending member to a desired width.

A lead wire shaping device in which a deep groove is formed in a bending gear, and a recess is formed on the inner surface of a cutting gear from the vicinity of the bottom of the tooth to a radius portion corresponding to the deep groove of the bending gear. Since the tip of the cut lead wire is released from contact with the inner surface of the cutting gear, it will fall more reliably.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 4, the lead wire shaping device includes a pair of side panels 1,
a main shaft 3 pivotally supported by the main shaft 1; and a guide shaft 4 arranged in parallel near the main shaft 1.
and a pair of cutting gears 5, 6 and a pair of bending gears 7, 8 fitted to the main shaft 3.
and a pair of cutters 9, 10 and a pair of bending members 11, 12 attached to the guide shaft 4.
It is configured with the following. The electronic component A that is shaped by this lead wire shaping device is
This is a so-called axial type electronic component in which lead wires B are drawn out from both ends of a resistor or capacitor.

As shown in FIGS. 1 and 2, the lower end of the left side panel 1 is attached to the left edge of the substantially rectangular base plate 13, and the lower edge of the right side panel 2 is attached to the right edge of the base plate 13, as shown in FIGS. It is fixed by screwing in. Shaft holes 1a and 2a for bearings 1b and 2b that pivotally support the main shaft 3 are provided above the left and right side panels 1 and 2, and engagement grooves 1c for locking the guide shaft 4 near the shaft holes, 2c is formed. Also,
Approximately at the center of each side panel 1, 2 is a stopper shaft 1 that locks a removable plate 24, which will be described later.
4 are arranged. Further, a tape guide shaft (not shown) is disposed near the stopper shaft, and a pair of tape guides are installed at a predetermined interval on this tape guide shaft, and electronic components A attached to the tape are attached to the tape guide shaft. is sent to the cutters 9 and 10 side. A component storage box 15 is placed on the base plate 13, and is capable of storing shaped electronic components A.

The main shaft 3 has a long groove 3a formed along the longitudinal direction of the shaft, and the side panels 1,
It is supported between two bearings 1b and 2b. A handlebar 16 having a handle grip 16a is fixed to one end protruding from the side panel 2, and a pulley 17 is fixed to the other end protruding from the left side panel 1. In addition,
By extending a belt between this pulley and a motor (not shown), the motor can be rotated to semi-automatize the lead wire shaping process.

The guide shaft 4 has locking pieces 18a of the scale 18 fitted to both ends thereof, and the locking pieces 18a are engaged with the engaging grooves 1c and 2c of the side panels 1 and 2, and the guide shaft 4 The set screw is inserted through the screw hole formed in the
A guide shaft 4 and a scale 18 are fixed to the side panel. The scale 18 includes:
There is a scale engraved with increasing numbers in the width direction,
The cutting length and bending position of the lead wire B of the electronic component A to be shaped can be set in advance.

The cutting gears 5 and 6 are connected to the lead wire B of the electronic component A.
2, 3 and 4.
As shown in the figure, metal teeth 5a, 6a are provided on the periphery of the cutting wheel holders 19, 2.
It is fixed at 0. The tooth grooves 5b, 6b of the cutting gears 5, 6 and the tooth grooves 7b, 8b of the bending gears 7, 8 (to be described later) have approximately the same shape, and the teeth are aligned on the same axis. Each tooth 5a, 6a, 7a, 8a of the four gears 5 to 8
Lead wire B of electronic component A is placed between them.

The inner surface of the cutting gears 5 and 6 has a concave portion 5d that is slightly more recessed than the portion that contacts the cutter, from the portion immediately near the bottom of the tooth to the radius portion corresponding to the deep groove portion of the bending gear, which will be described later. It is formed. Note that this concave portion 5d may be formed beyond the above range in the radial direction.

The cutting wheel holder 19, 20
It has a cylindrical shape and has screw holes 19a and 20a formed on its periphery. The cutting gears 5 and 6 are fixed to the inner surface, and bending holders 21 and 22 inserted into the main shaft 3 are fitted into the shaft holes. The bending holder 21, 2
2 has a substantially cylindrical shape, a bending gear is fixed to one end, and elongated holes 21a, 22a are formed in the axial direction, and the cutting wheel holders 19, 20
From the screw holes 19a, 20a to the elongated holes 21a, 2
An adjustment screw 23 that reaches the elongated hole 3a of the main shaft 3 via 2a is screwed. This adjusting screw is provided with a stepped portion of different diameters consisting of a large diameter portion and a small diameter portion, and the screw hole 19a,
20a to fix the cutting wheel holders 19, 20 and bending wheel holders 21, 22 to the main shaft 3,
By loosening the screw holes 19a, 22a, the cutting wheel holders 19, 20 and the bending wheel holders 21, 22 are moved in the axial direction, and the shaping position of the lead wire B can be adjusted.

The bending gears 7 and 8 are gears for bending the cut lead wire B, and the cutting gears 5 and 6 are attached to the periphery thereof.
Teeth 7a, 8a having substantially the same tooth shape as shown in FIG. And this bending gear 7, 8
Deep grooves 7c and 8c, which are deeper than the tooth bottoms 5c and 6c of the cutting gears 5 and 6, are formed by notching toward the center of the gears 7 and 8, and the grooves are cut into the deep grooves. Lead wire B can be stored. The removable plate 24 has a cutout 24a at the tip of the flat plate, and the cutout comes into contact with the stopper shaft 14, and slides on the stopper shaft. Then, remove the bent electronic component from the bending gear and drop it securely.

The cutters 9 and 10 are circular and are attached to the inner surfaces of cutting wheel guides 25 and 26 (described later) via countersunk screws, and have their peripheral edges abutted against the inner surfaces of the cutting gears 5 and 6, and their cutting edges 9a are It looks at the bottoms of the bending gears 7 and 8, that is, the bottoms of the cutting gears 5 and 6. The cutting wheel guides 25 and 26 are approximately half-moon shaped and have an inner circumferential edge 25a on the tip side close to an outer circumferential edge 5d of the bending gears 5 and 6.
5 and 26 are a pair of bending block sleeves 3 coaxially fitted on the main shaft 3;
The cutting gears 1 and 32 are fixed to sleeves 29 and 30 that are fitted onto the outside of the cutting gears 5 and 6, respectively, and are adapted to be linked with the movement of the cutting gears 5 and 6.

The bending members 11 and 12 are flat thick plates, and as shown in FIGS. 2 and 4, a recess 11a is provided on a part of the circumferential surface, and a bent portion 11b is formed on the inner circumferential edge. A booth G is created between the bending portion and the periphery of the bending gears 7 and 8. And a half-moon shaped bending wheel 2 on the inside surface.
7 and 28 are fixed, and the bending gears 7 and 28 are connected between the bending wheels and the bending members 11 and 12.
8 rotates. The bending wheel guides 27 and 28 are fixed to one end of the bending block sleeves 31 and 32, and are adapted to move in conjunction with the movement of the bending gears 7 and 8.

Next, the shaping process of the lead wire shaping device will be explained.

First, the cutting and bending widths of the electronic component lead wires are set. Then, the electronic component A is transferred from the tape guide to the lead wire shaping device, and as shown in FIG. Place. When the handle 16 is rotated to rotate the gears 5 to 8 in the direction of arrow C, the lead wire B is sent to the cutters 9 and 10 (see FIG. 5b). Lead wire B is cutting wheel guide 25, 26
When it moves on the inner circumferential side, both ends thereof are cut to a predetermined length by the cutters 9 and 10. At this time, the lead wire B is cut into the cutting gears 5 and 6 by the cutters 9 and 10.
However, as shown in FIG. 5c, the lead wire B on the electronic component A side falls into the deep groove 7c of the bending gears 7 and 8 and is stored at the same time as the cutting, as shown in FIG. 5c. Curvature is avoided. At this time, if the concave portion 5d is formed on the inner surface of the cutting gear, the tip of the lead wire B is completely released from the inner surface of the cutting gear, and the electronic components can more reliably fall into the deep groove portion 7c. (Figure 5d). continue,
The linear lead wire B is formed by the rotation of gears 5 to 8.
When the bending wheel guides 27 and 28 move on the inner circumferential side, the recesses 1 of the bending members 11 and 12
Both ends thereof are bent at right angles by the bending portion 1a and the bending portion 11b. As a result, both ends of the lead wire B are cut to a desired length, and the lead wire B is shaped so that the width of both ends is maintained at a predetermined width, so that it can be properly mounted on the wiring pattern of a printed circuit board, etc. Electronic component A is formed.

(Effects of the Invention) In the present invention, the deep groove portion is provided in the tooth bottom of the bending gear, so that deformation that occurs when cutting the lead wire of an electronic component is avoided. In other words, when the cutting gear and bending gear are rotated and the lead wire is cut with a cutter, if the lead wire does not change its radial position as in the conventional case, the tip of the cut lead wire will be in the cutter. However, in the present invention, the tooth bottom of the bending gear is formed in a deep groove that is deeper toward the center than the tooth bottom of the cutting gear, so the lead wire cannot get into this deep groove. This will prevent it from riding on top of the stubble. This eliminates bending at the tip of the lead wire, improves compatibility with the through hole of the printed circuit board, and improves workability. As a result, both ends of the lead wire after molding are shaped to the appropriate width, eliminating the need for conventional correction work, improving work efficiency, and making it possible to provide electronic components that match the wiring pattern. It also improves efficiency.

When a recess is formed in the cutting gear, the electronic component can fall more smoothly.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention,
Fig. 1 is a perspective view of the lead wire shaping device, Fig. 2 is an exploded perspective view showing the main parts of the device, Fig. 3 is a side view of the bending gear and cutting gear, and Fig. 4 is the third A partial sectional view taken along the - line in the figure, Figures 5 a to d are lead wire shaping process diagrams, Figure 6 is a perspective view of a conventional lead wire shaping device, and Figure 7 is a conventional bending device. FIG. 8 is a side view showing a gear and a cutting gear, FIG. 8 is a front view showing a bent lead wire, and FIG. 9 is a front view showing a shaped electronic component. 1, 2... Side plate, 3... Main shaft, 4... Guide shaft, 5, 6... Cutting gear, 7, 8... Bending gear, 7c... Deep groove part,
9, 10...Katsuta, 11, 12...Bending member.

Claims (1)

[Claims for Utility Model Registration] (1) A main shaft is pivotally supported between a pair of side panels arranged at a predetermined interval, and a guide shaft is arranged in parallel near the main shaft, A pair of cutting gears are fitted on the same axis of the main shaft, and a bending gear is fitted inside the cutting gear, so that the teeth of the bending gear and the cutting gear are aligned on the same axis. A pair of cutters and a pair of bending members are respectively attached to the guide shaft, and the cutters are brought into contact with the inner surface of the cutting gear so that the cutting edge thereof is positioned at the bottom of the cutting gear. In the lead wire shaping device, the bending member is arranged at the bottom of the tooth of the bending gear, the bottom of the bending gear has a deep groove portion deeper toward the center than the bottom of the cutting gear. A lead wire shaping device characterized by being formed. (2) A practical method in which a deep groove is formed in the bending gear, and a recess is formed on the inner surface of the cutting gear from just near the bottom of the tooth to a radius corresponding to the deep groove of the bending gear. A lead wire shaping device according to claim 1 of the patent registration claim.