JPS62262314A - Apparatus and method for manufacture of transmission line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a power transmission line composed of stranded wires having a spiral convex portion on the outer peripheral surface, and a manufacturing device directly used for the same. It is.

[Prior art and problems] As shown in FIG.
A power transmission line is known in which a shaped wire 22 having a large width is twisted together on its outermost periphery, and a spiral convex portion 20a is formed on the outer periphery of the stranded wire 20.

Conventional methods for manufacturing such stranded wire 20 have been carried out using an apparatus such as that shown in FIG. 3, for example. In other words, the die 8 is rotatably held in the die holder 7 via, for example, a thrust bearing (not shown), and when the strands 22 for forming the convex portions shown in FIG. 2 are twisted together. Depending on the generated rotational driving force in the spiral direction (circumferential direction), the die 8 itself rotates to follow the force when the strands 22 are twisted together, forming a convex portion 20a as shown in FIG. A method has been adopted in which twisted wires 20 are twisted together. In addition, in FIG. 3, 1 is a cage, 2 is a bobbin, 3 is a presser plate, and 4 is a collecting plate.

According to the conventional method as described above, the convex portion 20a formed as a result of twisting is manufactured while the die 8 is rotated by the rotational force, but the speed at which the spiral convex portion is formed and the rotation of the die are There was a problem in that the protrusions 20a of the stranded wire 20 did not mesh well with the grooves of the die, and galling occurred between the two.

Dies are generally made of iron or cemented carbide, and the outer wire of power transmission lines is generally made of aluminum, so the wire is softer than the material of the die.
As a result of the above-mentioned galling, the strands were scratched and aluminum powder was produced, which was burned into the die, making it impossible to handle.

In order to avoid the negative effects of the galling phenomenon described above, attempts have been made to use plastic dies, but the dies wear out quickly, the strands are not twisted properly in place, and the outer diameter Problems arose in that the wires became large and the wires were twisted in an inclined state.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to simplify the production of a wire for attaching a spiral convex portion to the outer periphery, without causing the above-mentioned galling phenomenon, and to make it possible to produce a wire that is always in good condition without causing the above-mentioned galling phenomenon. The present invention aims to provide a method for manufacturing power transmission lines that can be twisted well, as well as an apparatus for the same.

[Summary of the Invention J] That is, the gist of the present invention is that the first feature is that the collecting plate for supplying the strands and the die for forming the spiral convex portion are synchronously rotated and twisted together. In order to achieve such synchronous rotation, there is a second feature in the manufacturing apparatus in which a rotation transmission device that can provide synchronous rotation between the collecting plate and the dice holder which itself can rotate has a second feature. This makes it possible to always properly twist the wires for forming the spiral convex portions into the predetermined positions of the stranded wires, thereby eliminating the occurrence of the galling phenomenon described above.

[Example code] This will be explained below based on examples.

FIG. 1 is an explanation showing how a power transmission line 20 having a spiral convex portion 20a as shown in FIG. 2 is manufactured by a manufacturing method according to the present invention using an example of a manufacturing apparatus according to the present invention. It is a diagram.

In FIG. 1, 1 is the cage described above, 2 is a bobbin for feeding out the wire 22 forming the spiral convex portion 20a, and 3
4 is a holding plate for holding the formed wire 22 in a normal position to prevent it from being twisted; and 4 is a collecting plate. Regarding the wires to be twisted together in FIG. 1, the wires 21 having a small width are omitted for ease of explanation.

The strands 22 fed out from the bobbin 2 and guided to a predetermined position on the collecting plate 4 are led out from the collecting plate 4 toward the twisting V-shaped wire 8, and are guided to the convex portion 20a of the die 8 shown in FIG. You will be guided to the appropriate groove.

FIG. 4 is an explanatory diagram showing the configuration of the die 8,
The die 8 held by the die holder 7 has a die hole 8b corresponding to the outer diameter of the one small-sized formed wire 21 and a groove 8a corresponding to the twisted outer diameter of the large-width formed wire 22. The respective strands are gathered at the die 8 portion as shown in FIG. 4, and the die is rotated in the twisting direction to form the stranded wire 20 with the spiral convex portion 2Oa.

Therefore, in the device according to the present invention, the die holder 7 that holds the dice 8 is configured to be rotatable by itself, and the die holder 7 and the collecting plate 4 on the cage side are connected by the connecting rod 5. The collecting plate 4 and the die holder 7 are connected as shown in FIG. 1, and are configured to be able to rotate synchronously. That is, the die 8 according to the present invention is not rotated following the rotation of the strands 22 as in the conventional example described above, but is rotated by a connecting rod in which the collecting plate 4 constitutes a rotation transmission device. connected to 5,
The rotation of the collecting plate 4 is directly transmitted to the die holder 7, and the dice 8 held by the die holder 7 are rotated in synchronization with the rotation of the collecting plate 40. In FIG. 1, reference numeral 6 denotes a telescoping adjustment mechanism that expands and contracts the length of the connecting rod 5, and by adjusting this telescoping mechanism 6 according to the size of the twist pitch of the electric wires 20, it can suitably match the twist pitch of the wires. It is now possible to force it.

FIG. 5 is an explanatory sectional view showing details of a specific example of the structure in the vicinity of the connecting rod 5. As shown in FIG.

One end of the connecting rod 5 is firmly attached to the fixing mechanism 15 by the positioning screw 1 to prevent it from coming off due to centrifugal force on the collecting plate 4.
It is fixed by 4. On the other hand, the other end side of the connecting rod 5, that is, the side of the dice holder 7, is connected to the arm rod 7a that connects the dice boulder 7 and the connecting rod 5, and as described above, the side of the collecting plate 4 (that is, the cage 1 The rotation of the side) is transmitted directly to the die holder 7,
The connection between the connecting rod 5 and the arm rod 7a is not in a fixed state as on the collecting plate 4 side, but as shown in a partial front view in FIG. One end of the connecting rod 5 is inserted into the clevis 16, and the two are loosely engaged so that the connecting rod 5 can move in the axial direction.

In this way, one end of the connecting rod 5 is freely engaged, so that the connecting rod 5 and the collecting plate 4 or the die boulder 7 are connected to each other.
This prevents excessive stress from occurring during the twisting process. However, it goes without saying that this engagement method is not limited to that shown in FIG.

In addition, in FIG. 5, 6 indicates the expansion/contraction adjustment mechanism part of the connecting rod 5. Specifically, the length of the connecting rod 5 can be adjusted by loosening the fixing screw 13, and once the predetermined length is determined, it is fixed. It is fixed with screws 13.

However, this is also a specific example, and does not mean that the mechanism is limited to this type.

As mentioned above, the adjustment mechanism 6 allows the rotation of the die 8 to suitably match the twisting pitch of the stranded wire.

For J3 and J5 in the device shown in Figure 1, the die holder 7
．． 7 are arranged in multiple stages (three stages in FIG. 1) in the longitudinal direction of the stranded wire. It is possible to give a firm twist, make the twisting dense and complete, and prevent the strands from lifting up after the twisting.

Of course, if the die holders 7.7 are multistage, it is preferable that all die holders rotate synchronously, and each die holder 7.7 is connected to a gear 9 as shown in FIG.
．． 10.11 and the connecting rod 12, the suspensions are configured to rotate synchronously. Various means may be considered as specific means for this synchronous rotation, and it goes without saying that the method is not limited to the above.

As mentioned above, in a 1-way case where the dice are arranged in multiple stages, the first
If possible, the die that comes into contact with the wire first in each step should be made of synthetic resin, and it is preferable to use a die that will not damage the wire due to contact with the wire.
In this case, it is preferable to use a die having a twisting spout having substantially no approach portion. This is because if the conductor has an approach part, contact with the uneven conductor at the approach part is not uniform, and there is a risk that the strands may get caught in this approach part if rotational synchronization becomes uneven for some reason. This is because there is.

Furthermore, since the first stage die is made of synthetic resin, even if the wear described above progresses to a certain extent, unlike the case of a single die, the twisting is always completed in the succeeding die parts. Therefore, the problem that occurs in the case of a single die in the conventional example described above does not occur.

[Effects of the Invention] As described above, according to the method and apparatus for manufacturing a power transmission line according to the present invention, when twisting electric wires having a spiral convex portion on the outermost periphery of the stranded wire, the twisting pitch of the spiral convex portion can be adjusted according to the twisting pitch of the spiral convex portion. Because it fits well and the twisted U die rotates,
It is possible to minimize the galling phenomenon between the die and the wire constituting the convex part, and to produce an electric wire with a spiral convex part that has a beautiful appearance and is perfectly twisted. Nowadays, when the demand for such (grown) electric wires is increasing, the effects of the present invention are truly significant.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a single-piece assembly of a manufacturing apparatus according to the present invention, FIG. 2 is an end view showing an example of a single-piece piece of an electric wire having a spiral-shaped convex portion on the outer circumferential surface, and FIG. 4 is an explanatory diagram showing the vicinity of the die part of the device according to the present invention, and FIG. 5 is an illustration of the rotation transmission device of the manufacturing device according to the present invention. This is an explanatory sectional view showing an example. 4...Collecting plate, 5...Connecting rod, 6...Expansion adjustment mechanism, 7...Dice holder, 8...Dice, 20...Spiral-shaped convex power transmission line, 20
a...Spiral shaped convex portion, 21...- Molded strand with small width, 22...... Molded strand with large width. Agent: Patent Attorney Fujio Sato tEJ”:if@plot

Claims (7)

[Claims] (1) A method for manufacturing a stranded wire in which a spiral convex portion is formed on the outermost periphery, in which the strands for forming the convex portion, which are supplied through a collecting plate, are synchronized with the collecting plate. A method of manufacturing a power transmission line in which the power transmission line is guided to a twisting die for forming a spiral convex portion and twisted together. (2) An apparatus for manufacturing stranded wire having a spiral convex portion formed on the outermost periphery, including a collecting plate that guides the strands to a predetermined position for forming the protruding portion, which are unwound from a bobbin, and the collecting plate. a collecting die with a groove for forming a spiral convex portion that collects wires drawn from the wire and forms them into a predetermined cross-sectional shape; a die holder that holds the die and is rotatable itself; the collecting plate; A power transmission line manufacturing device comprising a rotation transmission device that is connected to a die holder and can provide synchronous rotation to both. (3) The manufacturing apparatus according to claim 2, comprising a plurality of dies arranged in multiple stages in the longitudinal direction of the stranded wire, each of which is configured to be able to rotate synchronously. (4) The manufacturing apparatus according to claim 3, wherein at least the first stage die is made of synthetic resin. (5) The manufacturing apparatus according to claim 4, wherein the die made of synthetic resin is formed into a twisting spout having substantially no approach portion. (6) The manufacturing apparatus according to claim 2, wherein the rotation transmission device is constituted by a connecting rod that is fixed on the collecting plate side and loosely engaged on the die holder side. (7) The manufacturing apparatus according to claim 6, wherein the connecting rod itself has an expansion/contraction adjustment mechanism in the axial direction.