JPH0533803B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is directed to forming a loop at the end of a coil winding wound around a coil bobbin, and twisting the end of the coil winding to twist the loop. It is about the method.

"Prior Art" When the coil winding is a thin wire, in order to improve the mechanical strength of the end of the coil winding a that is wound around the connection terminal of the coil bobbin, a loop r is formed at the end of the coil winding a. A stranding process is applied to twist the wires. In conventional twisted wire processing, as shown in Fig. 6, a coil winding a is wrapped around fixed pins b and b at both ends to form a loop r, and a swivel pin c is provided between fixed pins b and b. This is done by turning and twisting the wire in the direction of the arrow in the figure, thereby forming a twisted wire portion d having a constant number of twists as shown in FIG. 7, and forming twisted rings e at both ends. Ru.

"Problem to be Solved by the Invention" However, it is not easy to set the appropriate number of twists, and if the number of twists is too large, the strain produced in the coil winding will increase proportionally, and it will be difficult to tie the connection terminals. , the strength will decrease due to distortion in the manufacturing process due to soldering work, etc. On the other hand, if it is too small, the length l of the twisted ring e of the part hanging on the fixing pins b, b will be reduced.
As the wires become longer, problems such as wires getting caught in the nozzle of the winding machine and breaking occur, which has become a problem that needs to be solved.

The present invention has been made to solve the above-mentioned problems, and is a coil winding wire that does not cause a decrease in strength, and also does not cause the twisted ring to become large and get caught in the nozzle of a winding machine, etc. and break. The object of the present invention is to provide a method for twisting a terminal portion.

"Means for Solving the Problem" A specific means for achieving the above object is to form a loop at the end of the coil winding wound around the coil bobbin, and to twist the loop at the end of the coil winding. In the stranded wire processing method, a both end stranded wire processing step in which both ends of a loop formed at the terminal portion are twisted, and a center portion stranded wire processing step in which the central portion other than both ends are twisted are combined. The present invention is characterized in that the number of twists in the stranding process is greater than the number of twists in the center stranding process.

"Operation" According to the above-mentioned specific means, the twisted loops are reduced by the both ends twisting process in which the number of twists is large for the loop formed at the end of the coil winding, and the center part twisting process in which the number of twists is small. As a result, the strain on the part connected to the connecting terminal is reduced and strength does not deteriorate.

"Example" An example of the present invention will be described based on FIGS. 1 to 5 of the accompanying drawings.

FIG. 1 is a schematic diagram showing the entire winding operation of the coil winding 1. As shown in FIG.

The coil winding 1 is unwound from the winding frame 2, guided by guide rollers 3, and led to a twisting device 4. The stranding device 4 has an inlet 5 for the coil winding 1.
A lead-out nozzle 6 is formed, two fixed pins 7a and 7b are provided between them, and three pivot pins 8, 9, and 10 are provided at approximately equal intervals between the fixed pins 7a and 7b. Coil winding 1 introduced from introduction port 5
is passed around the fixed pin 7a on the outlet nozzle 6 side, returned to the inlet 5 side, and hung on the fixed pin 7b to form a loop R, and then led out from the outlet nozzle 6 to be transferred to the next winding processing device 11. lead to.

The winding device 11 is provided with a rotating nozzle 14 that forms an introduction nozzle 12 and supplies the coil winding 1 introduced from the nozzle 12 to a coil bobbin 13 which is fixedly attached and wound thereon. One end of the coil winding 1 supplied from the turning nozzle 14 is held by the terminal holding part 15, and winding of the coil winding 1 is started by turning of the turning nozzle 14. Further, the coil bobbin 13 and the rotating nozzle 14 are connected to each axis x
The coil bobbin 13 is caused to reciprocate in the axis x direction in harmony with the rotation speed of the rotation nozzle 14, thereby uniformly winding the coil bobbin 13.

Next, the operation of the twisted wire processing device 4 will be explained.

When the coil bobbin 13 has been wound a predetermined number of times by the rotating nozzle 14, the rotating nozzle 14 is stopped and the loop R of the coil winding 1 formed by being stretched around the fixing pins 7a, 7b of the stranding device 4 is removed. Twisting processing is performed on the

First, the rotation pins 8, 9, 1
0 simultaneously and integrally in the same direction and speed. This allows rotation pins 8 and 1 of loop R to
The coil winding 1 between 0 and 0 is not twisted, and only the coil winding 1 between the fixed pin 7a and the turning pin 8 and between the turning pin 10 and the fixed pin 7b, which are both ends of the loop R, is twisted. be done. After performing this both end stranding process, the swivel pins 8 and 10 are arranged so that there is no relative swivel speed difference between the fixed pin 7a and the swivel pin 8 and between the swivel pin 10 and the fixed pin 7b.
to be fixed. Then, by turning only the central turning pin 9, a central part twisting process is performed in which only the coil winding 1 between the fixed turning pin 8 and the turning pin 10 of the loop R is twisted. The number of twists in both of the above-mentioned steps is set to be greater in the both end portion stranding step than in the center portion stranding step. After both steps are completed,
When each of the pins 7a to 10 is retreated and removed, the finely twisted wire portions 21, 2 of the twisted ring 21a are processed by a process of twisting the wires at both ends with a large number of twists, as shown in FIG.
1 is formed at both ends, the length l of the twisted rings 22, 22 at both ends is also shortened, and the twisted wire part 23 is formed in the central part where the number of twists is small, and the twisted ring 23a in that part is formed at both ends 21, 21. The twisted wires are processed to be larger than the twisted ring 21a.

Incidentally, the order of each of the above steps does not matter which one is performed first.

The twisted coil wire 1 is supplied to the coil bobbin 13 through the lead-out nozzle 6 and the introduction nozzle 12 by the rotation of the rotating nozzle 14, and is wound around the twisted wire portion 21 several times to form a twisted wire. The length of the end portion of the coil winding 1 is adjusted so that the portion 23 is reliably tied to the terminal portion of the coil bobbin 13.

In addition, in the twisted wire processing device 4, before starting winding processing, each pin 7a to 10 returns from the retracted position, and the coil winding 1 is wrapped around the fixed pins 7a and 7b to automatically form a loop R. .

When winding is performed continuously, the twisted wire portion 2
If the wire is cut at the center cutting part 24 of 3, the first half will become the terminal end of the winding, and the second half will become the terminal end of the winding start, and the stranded wire part 23 at the end of the winding start.
The cut end is held by the terminal holding part 15 of the winding device 11, and winding is started from the twisted wire part 21 on the coil bobbin 13 by turning the turning nozzle 14. The coil bobbin 13 is made of resin, and as shown in FIG. 3, a pair of connection terminals 32, 32 are implanted in one flange 31 by integral molding, with one end protruding from the side end surface of the flange for external connection. terminal 33,
33, and at the other ends 34, 34, the stranded wire portion 23 at the winding start side end portion and the stranded wire portion 23 at the winding end side end portion of the coil winding 1 are tied and soldered in the subsequent manufacturing process. Connect by etc.

The above-described stranding process was applied to a 2-type urethane coated copper wire with a wire diameter of 0.1 mm, and the number of twists and the twisted rings 22 at both ends of the stranded wire were determined.
Figure 4 shows the relationship between the length l of the copper wire, and Figure 5 shows the relationship between the number of twists and the remaining elongation rate of the copper wire.

According to FIG. 4, as the number of twists increases, the length l of the twisted ring 22 becomes shorter, and according to FIG. 5, it can be seen that as the number of twists increases, the elongation retention rate of the copper wire decreases.

"Effects of the Invention" As clarified in the description of the above-mentioned specific means and effects, the present invention provides a both-end twisting process of twisting both ends of a loop formed at the end of a coil winding; By combining this process with the center part stranding process in which the central part of the wire is twisted, the number of twists in the both end part stranding process is greater than the number of twists in the center part stranding process. In the part where almost no distortion occurs, it is possible to increase the number of twists and shorten the length of the twisted ring at the end. In addition, the number of twists in the parts that are subject to bending and other strains due to being tied to the terminals of the coil bobbin has been reduced, which prevents a decrease in strength due to bending and disconnection during the binding and soldering work in later processes. There are effects such as being able to do it.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the entire winding operation of the coil winding 1, FIG. The figure is a perspective view showing the winding of the winding start side end of the twisted wire processing part on the coil bobbin 13, FIG. 4 is a graph showing the relationship between the number of twists and the length l of the twisted ring 22, and FIG. A graph showing the relationship between the number of twists and the remaining elongation rate of copper wire,
FIG. 6 is an enlarged view of a conventional stranded wire processing device, and FIG. 7 is an explanatory diagram illustrating stranded wire processing using the conventional device. DESCRIPTION OF SYMBOLS 1... Coil winding, 4... Twisting processing device, 6... Deriving nozzle, 7a, 7b... Fixing pin, 8, 9, 10...
Swivel pin, 11... Wire processing device, 13... Coil bobbin, 14... Swivel nozzle, 21, 23... Twisted wire section,
21a, 22, 23a... twisted rings.

Claims (1)

[Scope of Claims] 1. A method for twisting a coil winding end in which a loop is formed at the end of a coil winding wound around a coil bobbin, and the loop is twisted, wherein both ends of the loop formed at the end are twisted. The number of twists in the both ends stranding process is changed to the center stranding process by combining the both ends stranding process in which the two ends are twisted, and the center stranding process in which the central part other than both ends is twisted. A method for twisting a coil winding terminal, characterized in that the number of twists is greater than that of the above.