JPH0516152B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for winding the terminals of coils of intermediate frequency transformers, power transformers, etc. around bobbin terminals and cutting them, The present invention relates to a lead wire terminal processing method and apparatus for winding and cutting the terminals of a printed circuit board.

[Prior Art] In order to process the terminals of the lead wires, for example, the lead wires 3 ₁ , 3 ₂ , 3 ₃ of the winding 2 wound around the bobbin 1 as shown in _{FIG .} Some lead wires are wound around a wire a predetermined _number of times, then cut off and then fixed by soldering. Conventionally, this type of lead wire termination was mostly done manually. . In addition, some coils that wind thin windings of 0.02 mmφ to 0.3 mmφ are mechanized using an automatic winding machine, but the lead wire is wound by rotating a pencil-shaped winding supply unit around the terminal. Wrap it around the specified number of times,
The excess lead wire was cut by tension cutting.

[Problems to be Solved by the Invention] The conventional manual method had the following problems.

(a) In the case of thin winding wires with a diameter of 0.02 to 0.3 mm, the lead wires were wound around the terminals using fingers, tweezers, needle-nose pliers, nippers, etc., which resulted in poor workability.

(b) A gripping margin for gripping the lead wire with fingers or tweezers is required, which wastes material.

(c) After winding, the excess lead wire was cut off with a puller or nipper, so the cut end of the lead wire protruded by about 0.5 to 1.0 mm from the outer diameter of the terminal around which it was wound. This can easily cause short circuits with terminals, etc., and poor soldering.

(d) In the case of a thick winding wire with a diameter of 0.3 to 1.0 mm, the burden placed on the fingertips becomes large, and the excess lead wire must be cut using scissors or the like, resulting in poor workability.

In addition, the mechanical type using a conventional automatic winding machine has the same problems as (b) and (c) above, and also has a pencil-shaped winding supply section that rotates around the terminal. Because it is wound, it cannot be used for wires with narrow terminal spacing, and thicker windings of 0.3 to 1.0 mmφ require a thicker pencil-shaped tip, which may damage the wire and is expensive. There was a problem with becoming.

The present invention was made in view of the above-mentioned problems.
Automatically and reliably wraps the lead wire around the terminal a predetermined number of times and cuts off excess lead wire, and prevents the cut end of the lead wire from protruding beyond the outer diameter of the terminal around which it is wound. A method and a device of simple structure for carrying out the method are provided.

[Means for Solving the Problems] The method of the present invention involves inserting a terminal into a terminal insertion hole of a hair shaft, and rotating a cylindrical body rotatably fitted on the hair shaft. The lead wire near the terminal is captured, and the captured lead wire is cut to a predetermined length by sliding the shaft and the cylindrical body in the rotational direction, and the shaft is rotated. The invention is characterized in that the cut lead wire is wound around the terminal by a method.

The device of the present invention includes a shaft having a terminal insertion hole for inserting a terminal into the tip and a guide groove with the tip as a hook, and the shaft is rotatably fitted into the shaft. a cylindrical body provided with a guide hole on the side wall of the distal end, the distal end serving as a capture claw for capturing the lead wire;
The present invention is characterized in that it includes an engagement/disengagement mechanism that engages/disengages the cylindrical body from the hair shaft.

[Embodiment] FIGS. 1 to 6 show an embodiment of the apparatus of the present invention. In FIG. 1, 5 is a first holder that is movable in the vertical and horizontal directions; This is a second holder fixed to the first holder 5. The second holder 6 is provided with cylindrical sliders 8 ₁ , 8 ₂ , 8 ₃ rotatably and slidably supported by bearings 7 , 7 as shown in FIG. At the top of the sliders 8 ₁ , 8 ₂ , 8 ₃ , first and second flange portions 9 ₁ , 10 ₁ , 9 ₂ , 10 ₂ , 9
₃ , 10 ₃ are formed, and the cylindrical body 12 ₁ ,
12 ₂ and 12 ₃ are fixed. Said cylindrical body 12
₁ , 12 ₂ , and 12 ₃ , on the side wall of each tip,
As shown in FIG. 5, a guide hole 14 is drilled in which the leading end side serves as capture claws 13, 13 for capturing the lead wire. The first holder 5 is equipped with a motor 15 ₁ , 1 which is rotated by a control signal from a control unit (not shown).
5 ₂ , 15 ₃ are fixedly installed, and these motors 15 ₁ ,
15 ₂ and 15 ₃ are configured to transmit rotation to rotation shafts 16 ₁ , 16 ₂ , and 16 ₃ via deceleration mechanisms such as gears (not shown), respectively. The rotation shafts 16 ₁ , 16 ₂ , 16 ₃ are rotatably supported by the first holder 5 by bearings 17 , 17 as shown in FIG. 3, and the sliders 8 ₁ , 8
₂ , 8 ₃ , and is rotatably inserted into the tip.
The tie shafts 19 ₁ , 19 ₂ , 19 ₃ are fixed by set screws 18 , 18 as shown in FIG. 3 . At the tips of the tie shafts 19 ₁ , 19 ₂ , 19 ₃ , there are terminal insertion holes 20 and guide grooves 22 whose tips serve as hooks 21 , 21 for hooking the lead wires, as shown in FIG. and is drilled. _The sliders _{8 1 ,} 8 _{2 ,}
The pin holders 23 ₁ , 23 ₂ , 23 ₃ that come into contact with the upper surfaces of the first flange portions _{9 1 ,} 9 ₂ , 9 ₃ of 8 3 are fixed by set screws 24 as shown in FIG. 3, and the pin holders 23 ₁ , 23 ₂ , 23 ₃ are held by springs 25, and the sliders 8 ₁ , 8 ₂ , 8
Engagement grooves 2 bored in the first flanges 9 ₁ , 9 ₂ , 9 ₃ of ₃
A pin 27 is provided which engages with 6. In addition,
The pin 27 may be directly fixed to each of the pin holders 23 ₁ , 23 ₂ , and 23 ₃ without using the spring 25 . Said second
The holder 6 has air cylinders 28 ₁ , 28 ₂ , 2
8 ₃ is fixedly installed, and these air cylinders 28 ₁ , 2
8 ₂ , 28 ₃ piston rods 29 ₁ , 29 ₂ , 29 ₃
At the top are fork-shaped controls 30 ₁ , 30 ₂ , 30
₃ are fixedly installed, and these operators 30 ₁ , 30 ₂ , 3
At the tip of the roller ₃ , there is a roller 3 as shown in Fig. 6.
1 and 31 are rotatably provided, and these rollers 31 and 31 are connected to the first rollers of the sliders 8 ₁ , 8 ₂ , and 8 ₃ .
Flange parts 9 ₁ , 9 ₂ , 9 ₃ and second collar parts 10 ₁ , 10 ₂ , 10
It is inserted between ₃ . The air cylinder 28
Reference numerals ₁ , 28 ₂ and 28 ₃ are control signals from a control section (not shown) to control the pressure difference between the air injected from the upper and lower air inlets 35 and 36, thereby controlling the piston rods 29 ₁ and 28 3. 29 ₂ , 29 ₃
up and down, thereby controlling the controls 30 ₁ ,
Slider 8 ₁ with rollers 31 and 31 of 30 ₂ and 30 ₃ ,
The pin holder ₂ is fixed to the rotating shafts 16 ₁ , 16 ₂ , 16 ₃ by sliding the pins 8 2 and 8 ₃ up and down.
The pins 27 of 3 ₁ , 23 ₂ , 23 ₃ are engaged with and disengaged from the respective engagement grooves 26 of the first flange portions 9 ₁ , 9 ₂ , 9 ₃ of the sliders 8 ₁ , 8 ₂ , 8 ₃ . , second flanges 10 ₁ , 10 ₂ , 1 of sliders 8 ₁ , 8 ₂ , ₈ 3
Pins 32 ₁ , 32 ₂ , 32 ₃ protruding from the lower surface of 0 ₃
and a corresponding locking protrusion 33 fixedly provided on the second holder 6. At this time, the operators 30 ₁ , 30 ₂ , 3
Each of the rollers 31 and 31 of 0 ₃ is connected to the first flange 9
₁ , 9 ₂ , 9 ₃ and the second flange portions 10 ₁ , 10 ₂ , 10 ₃ so as not to impede the rotation of the sliders 8 ₁ , 8 ₂ , 8 ₃ . It's summery. The air cylinders 28 ₁ , 28 ₂ , 2
8 ₃ , operators 30 ₁ , 30 ₂ , 30 ₃ , pin holders 23 ₁ , 23 ₂ , 23 ₃ , sliders 8 ₁ , 8 ₂ , 8 ₃ and locking protrusion 33 are connected to the locking shafts 19 ₁ , 19
₂ , 19 ₃ and the cylindrical bodies 12 ₁ , 12 ₂ , 12 ₃ are connected to each other.

Note that the air cylinders 28 ₁ , 28 ₂ , 28 ₃
can be replaced with an electromagnetic solenoid, and by driving the movable core of this electromagnetic solenoid up and down, the operating elements 30 ₁ , 30 ₂ , 30 ₃ are moved up and down, and the same operation as described above is performed. It's okay.

A support rod 3 is provided on the outside of the front surface of the first holder 5.
7, 37 are provided protrudingly, and the support rods 37, 37 are provided with a thorn shaft 19, a cylindrical body 12, a motor 15, etc. in order to perform more thorn and cutting operations as required. A third holder 38 can be attached. In FIG. 1, reference numeral 39 denotes a bobbin holder that is movable in the front-rear direction. On the upper part of this bobbin holder 39, a winding 2 substantially similar to that shown in FIG. 12 is wound. ₁ ,
A bobbin 1 with terminals 3 ₂ and 3 ₃ temporarily fixed to corresponding terminals 4, 4 ₁ , 4 ₂ and 4 ₃ is fixed. It should be noted that a spring may be provided between the lower end of the bobbin 1 and the bobbin holder 39 to enable the bobbin 1 to move downward and to smoothly wrap the lead wire around the terminal. good.

Next, the operation of the above embodiment will be explained. To simplify the explanation, winding and cutting of the lead wire 3 ₂ around one terminal 4 ₂ will be explained. Other terminal 4
The same procedure is applied to ₁ and 4 ₃ .

(a) In FIGS. 1 and 2, move the first holder 5 downward and insert the terminal 4 ₂ into the terminal insertion hole 20 of the tie shaft 19 ₂ . At this time, the tip surface of the spindle 19 ₂ and the cylindrical body 12 ₂ and the bobbin 1
The distance between the terminal planting surfaces is approximately equal to the number of windings of the lead wire (for example, 3 turns).

(b) Next, when the motor 15 ₂ rotates based on the control signal from the control section, the hair shaft 19 ₂ and the cylindrical body 12 2 rotate in synchronism, and the cylindrical body 12 ₂ rotates as shown in FIG. The catching claws 13, ₁₃ of the body 122 catch the lead wire ₃₂ near the terminal ₄₂ , and pass it through the guide hole 14 to the guide groove ₂ of the shaft 192.
I will guide you to 2.

(c) The motor 15 ₂ continues to rotate, and the lead wire 3 ₂ is guided by the guide groove 22 of the spindle 19 ₂ .
is wound around the terminal 4 ₂ by the hook 21 of the hook shaft 19 ₂ as shown in FIG.

(d) In the state shown in FIG. 8, the air cylinder 28 ₂ is driven based on the control signal from the control section, the piston rod 29 ₂ moves downward, and the rollers 31, 31 of the operator 30 ₂ move toward the slider 8 ₂ slide the second flange 10 ₂ downward. For this reason,
The engagement between the pin 27 of the pin holder 23 ₂ and the engagement groove 27 of the first flange 9 ₂ is released, and the pin 32 of the second flange 10 ₂ of the slider 8 ₂ is engaged with the locking protrusion 33 . , the rotation of the cylindrical body 12 ₂ is stopped and the state shown in FIG. 9 is reached. On the other hand, since the spindle 19 ₂ continues to rotate, the lead wire 3 ₂ guided in the guide groove 22 of the spindle 19 ₂ passes through the guide groove 22 of the spindle 19 ₂ as shown in FIG. The outer end edge 22a of the side wall of the cylindrical body ₁₂₂ is cut by rubbing against the inner end edge 14a of the side wall of the guide hole 14 of the cylindrical body 122.

(e) Since the drag shaft 19 ₂ continues to rotate even after the lead wire 3 ₂ is cut, the cut end 3 ₂ a of the lead wire 3 ₂ is connected to the terminal 4 ₂ by the claw 21 of the lead wire 3 ₂ . As shown in FIG. 11, the cut end 3 ₂ a of the lead wire 3 ₂ is wound so that it does not protrude outside the outer diameter.

In the above embodiment, based on the control signal from the control unit, the lead wire is captured, the lead wire is wound, and the lead wire is cut as described in (a), (b), (c), (d), and (e) above. ,
Although the terminal processing is performed in the order in which the lead wires are wound, the present invention is not limited to this, and the operation (c) may be omitted based on the control signal from the control unit.
Capturing, cutting, and wrapping may be performed in the order of (a), (b), (d), and (e) described above.

In the embodiment, the spindles 19 ₁ , 19 ₂ , 19
₃ , the curly claws 21 formed at the tips of each of the
By providing two 21 facing each other on both sides, the lead wire can be wound around the terminal in either direction, but when winding only in one direction, there is only one claw. You can also use it as

In addition, two capturing claws 13, 13 are formed at the tip of each of the cylindrical bodies 12 ₁ , 12 ₂ , 12 ₃ so that the lead wire can be captured when rotating in either direction. If rotation in only one direction is required, only one catching claw may be used.

[Effects of the Invention] The lead wire terminal processing method according to the present invention includes inserting a terminal into the terminal insertion hole of the Karaage shaft as described above,
The lead wire near the terminal is captured by the rotation of the cylindrical body that is rotatably fitted on the shaft, and it is cut to a predetermined length by the friction between the shaft and the cylindrical body. However, since this is constructed so as to be wound around the terminal by rotation of the tie shaft, the following unique effects are produced.

(A) Even if it is a thin winding wire of 0.02 to 0.3 mmφ,
Even if the winding is as thick as 1.0 mmφ, the operation of winding and cutting the end of the wire around the terminal can be automated and reliable.

(B) Wrapping the lead wire around the terminal and cutting it eliminates the need for a gripping margin for gripping the end of the lead wire, reducing waste of wire material.

(C) Since the lead wire is wound around the terminal even after cutting, the cut end of the lead wire does not protrude beyond the outer diameter of the terminal, preventing short circuits and soldering between adjacent lead wires, etc. No defects occur.

(D) Since winding and cutting are performed using a cylindrical body and a spindle that rotates around the axis of the terminal, it can also be used for bobbins with narrow terminal spacing.

As described above, the device of the present invention comprises a rotatable hair shaft having a terminal insertion hole and a guide groove having a hair claw, and a cylindrical body having a guide hole having a capture claw. Since it is composed of a locking and disconnecting mechanism that connects and disconnects the shaft and the cylindrical body, in addition to the effects (A) to (D) mentioned above, the structure of the device is simpler than that of a conventional automatic winding machine. It can be manufactured at extremely low cost (for example, 1/10th the cost).

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the lead wire terminal processing device according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is an enlarged view of the main parts of Fig. 2 with a part cut away. , Fig. 4 is a perspective view showing the main parts of the Karaage shaft, Fig. 5
The figure is a perspective view showing the main part of the cylindrical body, Fig. 6 is a perspective view showing the main part of the operator of the locking/disengaging mechanism, and Figs.
Fig. 0 is an explanatory diagram of the operation of the device of the present invention, Fig. 7 shows the lead wire capturing operation, Figs. 8 and 9 show the lead wire winding operation, and Fig. 10 shows the lead wire cutting operation. FIG. 11 is a perspective view of a main part showing a state in which terminal processing of the lead wire has been completed, and FIG. 12 is a perspective view of the coil showing a state before terminal processing of the lead wire. 3, _{3 1} , 3 ₂ , 3 ₃ ... Lead wire, 4, 4 ₁ , 4
₂ , 4 ₃ ... terminal, 12, 12 ₁ , 12 ₂ , 12 ₃ ...
Cylindrical body, 13... Capture claw, 14... Guide hole, 1
9,19 ₁ ,19 ₂ ,19 ₃ ...Karage axis, 20...
... Terminal insertion hole, 21 ... Karaage claw, 22 ... Guide groove, 40 ... Engagement/disengagement mechanism.

Claims (1)

[Scope of Claims] 1. A terminal is inserted into a terminal insertion hole of a hair shaft, and a lead wire near the terminal is captured by rotation of a cylindrical body rotatably fitted on the hair shaft. and cutting the captured lead wire to a predetermined length by sliding the shaft and the cylindrical body in the rotating direction;
A lead wire end processing method characterized in that the cut lead wire is wound around the terminal by rotating the hair shaft. 2. A spindle provided with a terminal insertion hole for inserting a terminal into the tip and a guide groove with a hook on the tip side; A lead comprising: a cylindrical body provided with a guide hole whose tip end serves as a capture claw for capturing the lead wire; and an engagement/disengagement mechanism for engaging/disengaging the cylindrical body from the hair shaft. Line terminal processing device.