JP3031805B2 - Automatic winding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of winding a resin-coated wire tightly around a cylindrical outer peripheral surface of a mating member, and stripping a resin coating at both ends of the wire to a predetermined length. Each relates to a method of fixing a terminal pin.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
In order to connect (94) and (95) to each other, a resin joint (9) having a wire (10) embedded therein is used. The wire (1
0) is wound in a coil shape along the inner peripheral surface of the joint (9), and a pair of terminal pins (18) attached to both ends of the wire (10).
(18) has its head exposed and fixed to a pair of terminal portions (91) (91) formed at both ends of the joint (9). Connect a current-carrying device (92) to the pair of terminal pins (18) (18) and
By supplying electricity to (0), Joule heat is generated from the wire (10), and the joint surfaces of the joint (9) and the resin pipes (94, 95) are welded and fixed to each other.

Conventionally, as a method of manufacturing the above-mentioned joint (9), a wire (10) having a predetermined length is manually wound around an outer peripheral surface of a cylindrical core which is a resin molding core. After fixing the terminal pins (18) to both ends of the wire (10),
An outsert mold is arranged around the core, and a resin is filled around the core.

[0004]

However, the conventional manual winding method is extremely inefficient and not only does not increase the production amount, but also it is difficult to wind the wire tightly and to obtain a fixed quality. There was a problem that the joint of No. could not be obtained.

Accordingly, the present inventors have attempted to automate the winding operation. In the automatic winding process, the winding start end of the wire is stripped to a certain length, and the terminal pin is fixed to the strip portion. Wrap around. Then, after cutting the winding end of the wire, the coating resin at the end is stripped to a predetermined length, and the terminal pins are fixed to the strip.

Incidentally, in the joint (9) shown in FIG. 9, it is desirable that the terminal pin (18) is fixed at a position separated from the coil-shaped winding portion of the wire (10) by a certain distance.
For this, in the winding process of the wire (10),
(10) It is necessary to strip both ends to a fixed length, insert the strip portion into the terminal pin (18) by a fixed length, and fix the terminal pin (18) at a fixed position by caulking.

However, in the above-described automatic winding, the tension acting on the wire is increased by passing through the winding process, and when the winding end of the wire (10) is cut, the resin coating of the wire is larger than the core wire. There is a problem that the core wire shrinks and the length of the core wire obtained through the subsequent stripping process becomes longer than a predetermined strip length. SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic winding method capable of obtaining a constant strip length.

[0008]

In the automatic winding method according to the present invention, first, in a first step, a tip of a wire fed from a wire reel is stripped to a predetermined length, and a terminal pin is fixed to the strip portion. I do. In the second step, the wire is wound tightly around the cylindrical outer peripheral surface of the mating member, starting from the tip of the wire to which the terminal pin is fixed, while feeding the wire from the wire reel. In the third step, in the middle of the winding step of the wire, in order to cut the wire at a predetermined length from the start end, a position before the cut portion is pinched by a pinching mechanism, and the wire is cut. . 4th
In the step, the clamping force of the clamping mechanism is reduced to release the tension acting on the wire. Then, in the fifth step, after increasing the clamping force, the cut end of the wire is
Cutting is performed at a fixed length position from the holding portion by the holding mechanism toward the wire end, and a fixed length is stripped from the cut position, and terminal pins are fixed to the strip portion. Finally, in a sixth step, an unwound wire portion is tightly wound around the cylindrical outer peripheral surface while holding the terminal pin.

[0009]

In the above automatic winding method, the fourth winding in the middle of winding is performed.
In the process, when the tension acting on the wire is released, the coating resin of the wire shrinks more than the core wire, and the core wire projects from the end of the resin coating. Then, in the fifth step, the wire is cut at a fixed length from the holding portion by the holding mechanism toward the terminal end of the wire. And the core wire are aligned to the same length. After that, a certain length is stripped from the cutting position, so that the strip length is kept constant.

[0010]

According to the automatic winding method of the present invention, a fixed strip length can be obtained at both ends of the wire, so that the terminal pins are located at a fixed distance from the coiled winding portion of the wire. , And high quality winding can be realized by the automation process.

[0011]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a series of views showing a winding step according to the present invention, in which a core (17) is sandwiched between a fixed plate (37) and a support shaft (36) of a core driving device. At this time, a winding jig (8) for locking the terminal pin (18) is attached to the fixed board (37).

In this state, the leading end of the wire (10) fed from the wire reel is clamped by the robot hand (21), and the leading end of the wire is inserted into the wire strip mechanism (7) shown in FIG. Strip the tip of 10) over a certain length. Wire strip mechanism
(7) has strip blades (73) and (74) and cutting blades (75) and (76) at the tip of a rotating arm (71) and a fixed arm (72) pivotally connected by a pivot (70), respectively. And performs the stripping operation of the wire (10) by rotating the rotating arm (71).

Next, the distal end of the wire with the strip is inserted into the terminal pin swaging mechanism (6) shown in FIG. 3, and the terminal pin (18) is swaged and fixed to the end of the wire (10).
The terminal pin caulking mechanism (6) includes a pair of press arms (61) (61) that can be opened and closed, and connects the core wire of the wire (10) to the terminal pin (18).
With both the press arms (6
1) The terminal pin (18) is swaged and fixed to the wire (10) by the pressure of (61).

Thereafter, the terminal pin (18) is held by the robot hand, and the terminal pin (18) is locked at the tip of the winding jig (8) as shown in FIG. Subsequently, while rotating the core (17) around the cylinder axis, the wire (10) is unwound from the wire reel, and the core (17) is tensioned while applying tension to the wire (10) until immediately before the end of the winding step shown in FIG. 1 (b). 17) Wrap around the outer surface,
Thereafter, the rotation of the core (17) is stopped.

Next, as shown in FIG.
In order to cut the wire to a predetermined length, a position before the cut portion is held by the robot hand (21), and the wire is cut by the cutting blades (51) and (51) of the wire cutting mechanism (5). Thereafter, as shown in FIG. 4B, the clamping force F by the robot hand (21) is reduced to release the tension acting on the wire (10). In the case of the present embodiment, the pressure of the compressed air for driving the robot hand (21) is reduced to zero. Thereby, while the wire (10) is held lightly, the resin coating (19)
Shrinks more than the core wire (20), and as shown in FIG.
The tip of (0) protrudes from the resin coating (19) by a certain distance ΔL.

Then, the pressure of the compressed air for driving the robot hand (21) is increased again, and the robot hand (21)
In this state, the wire (10) is pinched, and the tip of the wire (10) is connected to the wire strip mechanism as shown in FIG.
Insert into (7). At this time, the forward position of the robot hand (21) is controlled so that the cutting blades (75) and (76) are independent of the distance B from the holding portion of the robot hand (21) to the tip of the wire.
So that the cutting position is separated by a predetermined distance A from the holding part,
The advanced position of the robot hand (21) is defined.

Accordingly, the turning arm (71) is turned in this state, and the wire (10) is cut by the cutting blades (75) and (76) as shown in FIG. 5 (b). By driving the robot hand (21) to separate the wire (10) from the wire stripping mechanism (7), the tip of the wire (10) is stripped over a predetermined distance L as shown in FIG. Will be.

Subsequently, as shown in FIG. 3, the distal end of the wire (10) is inserted into the terminal pin swaging mechanism (6), and the terminal pin (18) is swaged and fixed to the strip portion of the wire (10). At this time, since the strip portion of the wire (10) has a predetermined length L, as shown in FIG.
Length H of the core wire (20) exposed from between the terminal pin (9) and the terminal pin (18)
Is defined as a predetermined value.

The terminal pins (1
8) is locked to the locking portion (15a) of the arm (15) as shown in FIG. 7 (a). In this state, the core (17) and the arm (15) are rotated while rotating the core (17). As shown in FIG. 7 (b), the core (1) is brought close to each other and tension is applied to the unwound portion of the wire (10) until the terminal pin (18) comes as close as possible to the coil portion of the wire (10).
Wrap around the outer surface of 7). Finally, the winding end of the wire (10) is welded to the coil-shaped winding by a welding iron (81) as shown in FIG. 7C, and the winding of the wire (10) is completed.

As a result, as shown in FIG. 8, the wire (10) is tightly wound around the outer peripheral surface of the core (17), and terminal pins (18) are respectively provided at both ends of the wire (10). A caulked core is obtained. In the core, the rising height H 'of the terminal pin (18) from the wire winding portion is defined to a predetermined value.

According to the above automatic winding method, the operation of tightly winding the wire (10) on the outer peripheral surface of the core (17) is completely automated, so that the production efficiency can be drastically improved.

The description of the above embodiments is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, in the above embodiment, the winding process is automated with respect to the straight pipe core (17).
Needless to say, the same can be applied to a character-shaped core.

[Brief description of the drawings]

FIG. 1 is a series of diagrams showing a winding step.

FIG. 2 is a plan view schematically showing a wire strip mechanism.

FIG. 3 is a plan view showing a configuration of a terminal pin swaging mechanism.

FIG. 4 is a series of diagrams illustrating processing of a wire termination unit.

FIG. 5 is a series of diagrams illustrating a stripping process by a wire strip mechanism.

FIG. 6 is a partially broken side view showing a state in which a terminal pin is caulked and fixed to a wire tip.

FIG. 7 is a series of diagrams showing a winding step of an unwound portion of a wire.

FIG. 8 is a perspective view of a core on which a winding is applied.

FIG. 9 is a partially cutaway side view showing a step of energizing a wire of the joint.

[Explanation of symbols]

 (10) Wire (17) Core (18) Terminal pin (21) Robot hand (5) Wire cutting mechanism (6) Terminal pin caulking mechanism (7) Wire strip mechanism (8) Winding jig (9) Coupling

──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Mitsuru Ono 2480 Maido, Hiratsuka-shi, Kanagawa Prefecture Inside Mitsubishi Plastics Hiratsuka Plant (72) Inventor Yasushi Yashiro 2480 Mado, Hiratsuka-shi, Kanagawa Prefecture Mitsubishi Plastics Hiratsuka Plant (58) Field surveyed (Int. Cl. ⁷ , DB name) H01F 41/06, 41/10

Claims (1)

(57) [Claims] 1. A resin-coated wire is tightly wound around a cylindrical outer peripheral surface of a mating member to be wound.
A method of stripping a resin coating of a fixed length at both ends of a wire, and fixing terminal pins to the strip portions, respectively, wherein a tip of a wire fed from a wire reel is stripped to a fixed length, and the strip portion is formed. A first step of fixing the terminal pin; a second step of winding the wire tightly around the cylindrical outer peripheral surface from the wire tip to which the terminal pin is fixed while feeding out the wire from the wire reel; A third step of holding the position short of the cut portion by a holding mechanism to cut the wire at a predetermined length position from the start end at an intermediate stage of the turning step, and cutting the wire; A fourth step of weakening the holding force of the wire to release the tension acting on the wire; and increasing the holding force, and then terminating the cut end of the wire with the holding mechanism. A fifth step of cutting at a fixed length position from the holding portion to the wire end, stripping a fixed length from the cut position, and fixing a terminal pin to the strip portion; holding the terminal pin And a sixth step of tightly winding the unwound wire portion around the cylindrical outer peripheral surface while performing the operation.