JPH0440810B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to stranded cables, particularly stranded cables made of insulator-coated strands (hereinafter simply referred to as insulated strands), and stranded cables made of identifiable insulated strands. The present invention relates to a method and apparatus for manufacturing wire cables.

[Conventional technology]

Conventionally, manufacturing a stranded cable from insulated wires requires the following steps.

(a) Wire drawing process A process in which rough drawn wire is passed through a wire drawing die while being pulled by a take-up capstan to form a conductor with a predetermined cross-sectional shape, and this is wound onto a winding drum.

(b) Insulator coating step The wire obtained in step (a) is passed through an insulator extruder to extrude and coat the surface of the wire with heated and melted insulating material, and after cooling, the wire is wound onto a winding drum. Process.

(c) Twisting process A process in which the insulated wires obtained in step (b) are twisted together using various twisting machines and then wound onto a winding drum.

Furthermore, when manufacturing a cable with a sheath coating, step (d) is required.

(d) Sheath coating process The insulation-coated stranded wire obtained in step (c) is passed through an inclusion extruder and a sheath extruder, and the insulation-coated stranded wire is coated with the inclusions with the heated and molten material, and after cooling. The process of winding onto a winding drum.

Figure 2 shows a cross-sectional view of an example of a stranded cable, in which a plurality of (three in the figure) strands 1
It is constructed by twisting insulated wires 3 whose outer periphery is coated with an insulator 2 made of plastic or the like, and in FIG. It is something that will be done.

[Problem that the invention seeks to solve]

However, such conventional methods of manufacturing stranded wire cables have the following problems. That is, 1)
Since the manufacturing process is performed in separate steps as described above, the entire process becomes complicated. 2) Manufacturing equipment becomes larger and requires a large installation area.
3) It is necessary to repeat drum winding for each process and transport it to the next process, and redundant drum winding requires unnecessary power and transportation means. 4) Conventional wire stranding machines rotate while holding the strand supply drum or strand winding drum inside the machine, so continuous operation is limited by the amount of wire wound on the drum, and operation has to be stopped each time the drum is replaced. continuous mass production is impossible. 5) For various needs, in order to distinguish one insulated wire in a cable from another insulated wire, for example, as shown in FIG. 4, a specific projection 6 is formed on the surface of a specific insulated wire 3 Or,
Alternatively, if it is desired to manufacture a cable with a particular coloration, it is necessary to position these protrusions or colorations so that they always appear on the outer surface of the strands.
In order to do this, it is necessary to give each insulating strand a twist in the same direction as the twisting direction so that the phases of the multiple strands twisted together in the above-mentioned (c) do not shift. Conventional wire twisting machines are limited to either rotary winding type or rigid type.

The present invention has been made by focusing on the drawbacks of the prior art when producing stranded cables made of insulated strands or mutually distinguishable insulated strands.
By integrating the wire drawing, insulator coating, and burning wire processes, we aim to streamline the entire process, reduce the number of installation spacers, and reduce power costs, and also make it easier to identify the insulated wires that have been burnt together. Another object of the present invention is to provide a method and apparatus capable of continuous production without limit.

[Means for solving problems]

In order to achieve the above object, the present invention supplies a rough wire to an extrusion molding machine, and extrudes a wire using a plurality of dies arranged in a circle around a central axis on a rotating body of the extrusion molding machine. a step, the elements extruded from each of the dies are transferred to an insulator-covered rotating head equipped with a rotating body that rotates in synchronization with the rotating body and has insulator-coated members corresponding to each of the dies penetrated in a circular shape; It is characterized by a structure consisting of a step of inserting a wire to cover the insulator, and a step of twisting the plurality of insulator-covered strands by winding them together through a twisting opening.

Alternatively, between the step of coating the insulator and the step of twisting, a colored coated member or a non-coated member that rotates in synchronization with the rotary body of the insulator coated rotary head and corresponds to each die. A step of inserting the insulator-coated strands from the insulator-coated rotary head into one or more colored coating rotary heads equipped with a rotary body having a ring-like base disposed therethrough and applying a desired color thereto is added. It is characterized by its composition.

Further, the device of the present invention includes a rotating body, an annular groove provided on the outer periphery of the rotating body, and a fixed shoe member that engages with the annular groove and increases the amount of protrusion into the annular groove at a constant rate. a pocket formed by an annular groove and a fixed shoe member and whose cross-sectional area can be reduced as the amount of protrusion of the fixed shoe member changes; and a pocket arranged in a circle around the central axis of the rotating body and communicating with the pocket. An extrusion molding machine equipped with a plurality of dies, a rotary body that rotates in synchronization with a rotary body of the extrusion molding machine, and an annular groove provided on the outer periphery of the rotary body,
a fixed shoe member partially fitted into the annular groove;
A pocket formed by an annular groove and a fixed shoe member and into which fluidized insulation coating material is pressurized and filled, and a pocket that communicates with the pocket and extends in the axial direction of the rotating body and corresponds to each die of the extrusion molding machine. The present invention is characterized by a structure consisting of an insulator-coated rotary head having a plurality of insulator-coated members, a twisting opening, and a winding drum.

Or, in addition to the above configuration, a rotating body that rotates in synchronization with the rotating body of the insulator-covered rotating head;
an annular groove provided on the outer periphery of the rotating body, a fixed shoe member partially fitted into the annular groove, and a pocket formed by the annular groove and the fixed shoe member and filled with paint under pressure; A configuration in which one or more colored coating rotary heads are added that penetrate the pocket and the rotary body in the axial direction and are selectively provided with a plurality of colored coating members or non-painted bases corresponding to each of the insulator coating members. You can also use it as

The present invention will be explained in more detail below based on the accompanying drawings.

FIG. 1 shows an overall explanatory diagram of the stranded cable manufacturing apparatus of the present invention.

In the figure, 7 is an extrusion molding machine equipped with an extrusion rotating head, 8 is a supply drum for supplying the rough wire 9 to the extrusion molding machine 7, 10 is a motor for driving the extrusion rotation head, and 11 is a speed reducer. The extrusion molding machine 7 is disclosed in, for example, Japanese Patent Publication No. 59-36716, and has a structure shown in FIG. 5 as a sectional view of the main part.
That is, in FIGS. 5a and 5b, 12 is the motor 1.
0 and a speed reducer 11. An annular groove 13 having a pocket 14 at the bottom of the groove is formed in the outer periphery of the rotating body 12, and an annular fixed shoe member 15 is engaged with the groove 13. The fixed shoe member 15 has a wire passage a for supplying the material (rough drawing wire), and is provided with a guide roll 65 at the entrance thereof for feeding the rough drawing wire. The amount of protrusion into the groove 13 gradually increases in the direction of rotation (direction of arrow b), and the cross-sectional area of the pocket 14 formed by the groove 13, the groove bottom, and the inner circumferential wall of the fixed shoe gradually decreases. There is. In addition, the rotating body 12 includes
A plurality of dice 18 are arranged in a circle facing this pocket 14.

In FIG. 1, 19 is a cooler connected to the extrusion molding machine 7, 20 is an insulator-coated rotary head connected to the cooler 19, and a drive motor 22 and a speed reducer are mounted on a sliding base 21. It is installed together with 23. Further, 24 is a known plastic extruder.

Details of the insulator-coated rotary head 20 are shown in FIG. 6 as a front view including a half cross section, and in FIG.
It is shown as an A sectional view. That is, 25 is a rotating body that is rotated in synchronization with the rotating body 12 of the extrusion molding machine 7 via a sprocket 26, 27 is an annular groove provided on the outer periphery of the rotating body 25, and 28 is an annular groove 2.
Pocket 7 communicates with the groove bottom, 29 is an annular groove 27
A fixed shoe member 30, which is partially fitted into the housing, is a housing. Further, 31 is an insulator coating member provided through the rotating body 25 in the axial direction, and is connected to the core metal 32 and the base 3.
3 are connected to each other via a slit 34, and the slit 34 communicates from the pocket 28 to the inside of the base 33. This insulator covering member 31 is formed by an extrusion molding machine 7.
A plurality of dies 18 are provided through the rotary body 25 in correspondence with the dies 18 provided on the rotary body 12 . Note that 35 is a bearing, 36 is a connecting portion between the insulator-coated rotary head 20 and the plastic extruder 24, and 37 is a supply path for the plastic heated and fluidized in the plastic extruder 24.

Next, in FIG. 1, 38 is a cooling tank connected to the insulator-coated rotary head 20, 39 is a twisting port connected to the cooling tank 38, 40 is a stranded cable twisted together, 41 is a winding capstan, 42 is a winding drum, and 43 is a motor for driving the winding drum 42.

The apparatus having the above configuration is used for manufacturing stranded cables as shown in FIG. 2 or 3, but as shown in FIG. 4, projections 6 for identifying insulated wires are formed. When manufacturing a stranded wire cable, by providing a predetermined notch corresponding to the shape of each protrusion in a part of the cap 33 of the insulator covering member 31, it can be easily manufactured in the same manner as in the case of ordinary insulator extrusion. can be formed into In addition, such a protrusion 6
If identification is to be carried out by coloring the insulator instead of by coloring, the colored coating rotary head 44 in FIG. 8 is placed between the cooling tank 38 and the twist opening 39 in FIG. This is done by arranging as many as 3 in series.

FIG. 8 is a half-sectional view of the colored coating rotating head 44.
FIG. 9 shows a longitudinal sectional view of the main part of the rotary head 44.

In the figure, 45 is a rotating body, 46 is an annular groove provided on the outer periphery of the rotating body 45, 47 is a pocket communicating with the annular groove 46, 48 is a fixed shoe member partially engaged with the annular groove 46, and 49 is a fixed shoe member that is partially engaged with the annular groove 46. A housing, 50 is a sprocket for transmitting the driving force of the rotating body 45, 51 is a connecting portion of a plurality of colored painted rotating heads 44, 52
53 is a bolt screwed into the connecting portion, and 53 is a bearing. Reference numeral 54 denotes a colored coating member, which has a through hole 56 through which the insulating wire 3 is passed through in the direction of the central axis, and a base 55 with a contact body 57 for applying colored paint facing the through hole 56. It is formed so as to extend through the rotating body 45 in the axial direction. The contact body 57 is made of a sponge-like material that is flexible and can be applied uniformly so as not to damage the surface of the insulating wire 3, and is communicated with the pocket 47 through the paint introduction hole 58. Ru. In addition, 59 is a seal for preventing paint from leaking from the fitting part between the annular groove 46 of the rotating body 45 and the fixed shoe member 48, and 60 is a seal for preventing paint from leaking provided between the rotating body 45 and the base 55. It's an O-ring. Further, 61 is a base for non-painting, and only a through hole 62 through which a chlorine-free wire is passed is provided in the direction of the central axis.

One set of the colored coating members 54 is provided in one rotating body 45 corresponding to the chlorine-free wire 3 to be colored, and a base 61 for non-coating is provided in the passage portion of the other insulated wires. is provided through the insulator covering member 31 shown in FIG. 7 described above. Therefore, as shown in FIG.
In the case where a plurality of different colors are applied by passing through the member 54, a non-painting base 61 is provided through the other rotary body corresponding to the colored member 54.

[Effect]

Next, the effect will be explained. Figures 1 and 5
In Figures a and b, the rough wire 9 as a material is supplied into the pocket 14 from the wire passage a of the fixed shoe member 15 along the guide roll 65. As the rotating body 12 rotates, the wire rod supplied into the pocket 14 advances to fill the inside of the pocket 14 due to its frictional force. Since the pocket 14 has a structure in which the cross-sectional area gradually decreases, the material progresses while being compressed, and when a predetermined compressive stress is reached, the die 18 turns the material into a wire having a desired wire diameter. Continuously extruded as The wire thus extruded is rotating together with the rotating body. This strand 1 is then cooled by a cooler 19 whose atmosphere is adjusted to prevent the generation of scale (copper oxide), and then passed through a rotating body 12 of an extrusion molding machine 7 and a sprocket 26 shown in FIG. The insulator coated member 31 of the insulator coated rotary head 20 which is rotated synchronously is supplied to the insulator coated member 31 and introduced into the core bar 32 thereof. On the other hand, an insulating material such as PVC heated and fluidized by a plastic extruder 24 is supplied to the pocket 28 of the insulator-coated rotary head 20 through a supply path 37 at a constant pressure, and then passes through a slit 34 to a core metal 32. The outer periphery of the strand 1 from the tip to the base 33 is continuously coated.

The insulated wire 3 coated with an insulator is then cooled while passing through a cooling tank 38 , twisted together at a twisting port 39 , and then transferred to a winding capstan 41 .
The cable is then wound onto a winding drum 42 to produce a stranded cable. In the above process, the plurality of strands 1 and insulated strands 3 sent out in the axial direction from the extrusion circuit head of the extrusion molding machine 7 pass through the cooler 19, the insulator-covered rotary head 20, and the cooling tank 38, and then reach the twisting port 39. The fibers advance while rotating in parallel to the delivery direction until reaching , and are twisted together at the twisting opening 39 by the rotational force.

Next, when the outer peripheral surfaces of the insulators of the plurality of insulated wires 3 are colored differently so that some or all of the insulated wires constituting the stranded cable can be identified, they are cooled in a cooling tank 38. The insulated wire 3 is passed through a colored coating rotary head 44 shown in FIGS. 8 and 9.

In this case, the rotating bodies 45 of the plurality of colored coating rotating heads 44 are rotated in synchronization with the rotating bodies 25 of the insulator-coated rotating heads 20 via the sprocket 50 and the connecting part 51, and then exit from the cooling tank 38 and rotate in parallel. Meanwhile, the advancing plurality of insulating strands 3 are colored by the contact body 57 while passing through the colored coating members 54 of the plurality of colored coating rotary heads 44 which are connected in series for the number of colored insulated strands 3 required. be painted. The colored insulated wire 3a is thus rotated in parallel with the unpainted insulated wire 3, and the twisted opening 39 is rotated.
The twisted wire cables are twisted together by the rotational force at the step 3, and an identification stranded cable is manufactured.

As described above, in the present invention, the rotating bodies 25, 45 of the insulating coating rotating head 20 and the colored coating rotating head 44 are always rotated in a constant direction and at a constant speed in synchronization with the rotating body 12 of the extrusion molding machine 7, respectively. Therefore, the insulating coating and coloring coating within each rotating head 20, 44 are always maintained in a constant positional relationship with respect to the rotational position of the wire 1 extruded from the extrusion molding machine 7. Therefore, the phase of the differently colored insulated wires provided on the exposed outside of the insulated wires constituting the cable does not change even after they are twisted into strands.

In addition, in order to manufacture an armored cable in which the stranded cable shown in FIG. 2 or 4 manufactured according to the present invention is coated with an inclusion 4 and an exterior sheath 5 as shown in FIG. A known inclusion extruder, sheath extruder, and cooling tank (not shown) are installed between the winding capstan 39 and the winding capstan 41, respectively, and the production can be carried out by a conventional method.

〔Effect of the invention〕

Since the method and apparatus for manufacturing a stranded wire cable of the present invention have the configuration and operation described in detail above, the manufacturing process of a stranded wire cable from bare wires, which conventionally required multiple complicated steps, can be integrated into one step. The whole thing is greatly simplified. In addition, by downsizing the manufacturing equipment, the installation area is reduced, and further significant power and labor savings can be achieved. Furthermore, it is possible to achieve revolutionary rationalization of cable production, such as by making unlimited continuous mass production possible. Further, according to the present invention,
Since it is possible to manufacture a stranded cable in which the phase between multiple strands is always constant, there are excellent advantages such as the ability to easily manufacture a cable whose insulated strands are easily identifiable. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing the overall configuration of a stranded cable manufacturing apparatus according to the present invention, and FIGS. 2 to 4 are
A cross-sectional view of an embodiment of the stranded cable, FIG.
FIG. 1 is a diagram showing details of the extrusion molding machine in FIG. 1, where a is a partially broken side view seen from B in FIG.
-C sectional view, FIG. 6 is a front view including a half cross section of the insulator-coated rotary head seen from D in FIG. 1, and FIG. 7 is a half cross section taken along line A-A in FIG. 6. , FIG. 8 is a half-sectional view of the colored coating rotary head corresponding to FIG. 7, and FIG. 9 is an enlarged sectional view of the main part of FIG. 8. 1...Element wire, 3...Insulator coated element wire, 3a...
Colored coated insulator coated wire, 7... Extrusion molding machine, 9... Rough wire, 12... Rotating body, 13... Annular groove, 14... Pocket, 15... Fixed shoe member, 18... Dice, 20...Insulator-covered rotating head, 25...Rotating body (of the insulator-covered rotating head), 28...Pocket (of the insulator-covered rotating head), 29...Fixation (of the insulator-covered rotating head) Shu member, 27... (of insulator-covered rotating head)
Annular groove, 31...Insulator covering member, 39...Twisted opening, 40...Twisted wire cable, 42...Winding drum, 44...Colored paint rotating head, 45...(Rotation of the colored paint rotating head) Body, 46... Annular groove (of the colored paint rotating head), 47... Pocket (of the colored paint rotating head), 48... Fixed shoe member (of the colored paint rotating head), 54... Colored paint member, 61... ...Base for non-painting.

Claims (1)

[Scope of Claims] 1. A step of supplying a rough drawn wire to an extrusion molding machine and extruding the wire using a plurality of dies arranged in a circle around a central axis on a rotating body of the extrusion molding machine, and said rotation. The strands extruded from each of the dies are inserted into an insulator-coated rotary head equipped with a rotating body that rotates in synchronization with the body and penetrates an insulator-coated member corresponding to each of the dies in a circular shape. A method for manufacturing a stranded wire cable, comprising: a step of coating an insulator; and a step of twisting the plurality of insulator-coated strands by winding them together through a twisting port. 2. A step of supplying a rough wire to an extrusion molding machine and extruding the wire using a plurality of dies arranged in a circle around the central axis of a rotating body of the extrusion molding machine, and synchronously rotating said rotary body. At the same time, a step of inserting the wire extruded from each die into an insulator coating rotating head equipped with a rotating body having a circular insulator coating member penetrating the insulator coating member corresponding to each die to cover the insulator. and one or more colored bodies, which rotate in synchronization with the rotating body of the insulator-coated rotary head, and have colored coating members corresponding to each of the dice or non-painted ferrules arranged in a circular manner through the rotating body. Paint rotating head,
It consists of a step of inserting the insulator-coated strands from the insulator-coated rotating head and coloring them as desired, and a step of twisting the plurality of insulator-coated strands by winding them together through the twisting opening. A method for manufacturing a stranded cable, characterized by: 3. A rotating body, an annular groove provided on the outer periphery of the rotating body, a fixed shoe member that engages with the annular groove and increases the amount of protrusion into the annular groove at a constant rate, and a fixed shoe member of the annular groove. and a plurality of dies arranged in a circle around a central axis of the rotating body and communicating with the pocket. an extrusion molding machine; a rotary body that rotates in synchronization with a rotary body of the extrusion molding machine; and an annular groove provided on the outer periphery of the rotary body;
a fixed shoe member that is partially fitted into the annular groove;
A pocket formed by an annular groove and a fixed shoe member and into which fluidized insulation coating material is pressurized and filled, and a pocket that communicates with the pocket and extends in the axial direction of the rotating body and corresponds to each die of the extrusion molding machine. 1. A stranded cable manufacturing device comprising: an insulator-covered rotary head having a plurality of insulator-covered members, and a twisting port and a winding drum. 4 A rotating body, an annular groove provided on the outer periphery of the rotating body, a fixed shoe member that engages with this annular groove and increases the amount of protrusion into the annular groove at a constant rate, and an annular groove and a fixed shoe member. and a plurality of dies arranged in a circle around a central axis of the rotating body and communicating with the pocket. an extrusion molding machine; a rotary body that rotates in synchronization with a rotary body of the extrusion molding machine; and an annular groove provided on the outer periphery of the rotary body;
a fixed shoe member that is partially fitted into the annular groove;
A pocket formed by an annular groove and a fixed shoe member and into which fluidized insulation coating material is pressurized and filled, and a pocket that communicates with the pocket and extends in the axial direction of the rotating body and corresponds to each die of the extrusion molding machine. an insulator-coated rotary head comprising a plurality of insulator-coated members, a rotary body that rotates the rotary body of the insulator-coated rotary head synchronously, an annular groove provided on the outer periphery of the rotary body; a fixed shoe member partially fitted into the annular groove; a pocket formed by the annular groove and the fixed shoe member and filled with paint under pressure; It is characterized by comprising one or more colored coating rotary heads which are selectively provided with a plurality of colored coating members or non-painted caps corresponding to the insulator coating members, a burner port and a winding drum. Stranded cable manufacturing equipment.