JPH0565630B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for twisting elongated bodies that have high torsional rigidity, or for which torsion poses a problem in performance.

``Conventional technology'' When twisting cables with small diameters,
Alternately twist the cables together, or pass each cable through the batten and alternately rotate the batten while twisting the binder thread from the outside.
Cases such as S-Z type twisted cables are provided by holding the bundled state of the cables with a pressing tape or by covering the outer periphery with an extrusion covering means.

In the above-mentioned S-Z type twisting means, since torsion acts on each long body to be twisted, it is difficult to apply twisting to high-voltage power cables or fluid transport pipes that have high torsional rigidity or cannot be twisted. It is not possible to twist long bodies together, which poses a problem in performance.

Therefore, when twisting these long bodies, usually each long body is wound onto a separate winding frame, these winding frames are mounted on a cage that can freely revolve, and the winding bodies are twisted from the winding frame on the revolving cage. Each elongate body is drawn out and twisted together while preventing twisting.

``Problems to be Solved by the Invention'' However, with the latter twisting means mentioned above, the length of the cable that can be wound around the winding frame is limited due to the winding capacity, load resistance, etc. of the winding frame. As the length of the twisted cable becomes shorter, when trying to obtain long cables such as submarine cables, many connections are required, resulting in decreased productivity and uneconomical conditions, which is a weak point in terms of quality. There also arises an inconvenience that the number of locations increases.

In view of the above-mentioned problems, the present invention provides a method for twisting elongated bodies in which the aggregate obtained by twisting the elongated bodies is sufficiently long.

"Means for Solving the Problem" The method according to the present invention involves continuously feeding a plurality of elongated bodies in parallel with each other from the supply side to the winding side. It is characterized in that the bodies are each formed into a reciprocating spiral shape, and the formed elongated bodies are assembled by vertically supporting each other, and the polymer is maintained in an assembled state.

``Operation'' In the case of the method of the present invention, each long body is continuously fed from the supply side until it reaches the winding side. However, the main step in this process is to form each elongated body into a reciprocating spiral shape.

A reciprocating spiral consisting of a right-handed spiral and a left-handed spiral, in which these two types of spirals are arranged alternately in the axial direction, does not consist of only a right-handed spiral or only a left-handed spiral, so there is no twist in a long body. This reciprocating spiral can be formed without continuously rotating the elongated body in a fixed direction.

Therefore, when forming a reciprocating spiral on each elongated body using a suitable forming means, each elongated body is wound onto a winding frame,
There is no need to mount these winding frames on a revolving cage and feed each elongated body from there, and there is no restriction on the so-called winding frame.

When not limited by the winding frame, extremely long elongated bodies can be continuously supplied from, for example, a large winding drum, and as a result, a sufficiently long aggregate can be obtained by twisting the elongated bodies.

Of course, when the elongated bodies are assembled after the reciprocating spiral is formed, these elongated bodies are not straight, but a type of spiral, so they look no different from conventional twisted objects, There is no difference in strength.

"Embodiments" Specific embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a known feeding machine for feeding a long body in a predetermined direction, 2A, 2B, and 2C are molding machines for shaping the long body placed next to the feeding machine 1, and 3 is a molding machine. A collecting machine 4 is placed next to the machines 2A to 2C for assembling long objects, 4 is an armoring machine for bundling aggregates, which is located next to the collecting machine 3, and 5 is a pair of armoring machines arranged next to the armoring machine 4. Reference numeral 6 denotes a known winding machine for taking off the aggregate, which is composed of an endless rotating rail.

Since each of the above-mentioned molding machines 2A to 2C has the same configuration, the construction of these machines will be explained using the molding machine 2A shown in FIG. 2 as a representative.

In the molding machine 2A shown in FIG.
A guide member 10 such as a roller or a ring is attached to the inside of the inlet portion 7, and a bending mechanism 11 is provided between the inlet portion 7 and the outlet portion 8.

This bending mechanism 11 includes a fixed support member 12 and adjustment portions 13s and 13 of the fixed support member 12.
A plurality of forming rollers 1 attached to t, 13u
4s, 14t, 14u, and the movable support member 15 and each adjusting part 16s, 16 of the movable support member 15.
A plurality of forming rollers 1 attached to t, 16u
7s, 17t, 17u, and an intermittent movement mechanism 18 for intermittent movement of the movable support member 15.

The fixed support member 12 and the movable support member 15 are arranged opposite to each other along the center line connecting the inlet part 7 and the outlet part 8 of the housing 9, and the fixed support member 12 is fixed at that position and The movable support member 15 is supported so as to be able to reciprocate toward the fixed support member 12 via an intermittent movement mechanism 18.

On the other hand, each of the molding machines 2A to 2C is supported so as to be rotatable in clockwise and counterclockwise directions around these axes. As schematically shown in FIG. 2, a rotational drive mechanism 19 and a transmission mechanism 20 are provided.

In FIG. 1, reference numeral 21 denotes a mechanical (line shaft, etc.) or electrical (wiring including an electric circuit) interlocking mechanism for interlocking the take-up machine 5 and the rotation drive mechanism 19.

In the figure, 22a, 22b, 22c are elongated bodies, 23
24 is a binding material for the assembly 23; 25 is an aggregate formed by twisting these elongated bodies 22a to 22c;
is a tension member.

Incidentally, a specific example of the elongated bodies 22a to 22c is a cable unit used in manufacturing a large power cable;
22c may be a cable unit used in manufacturing an optical communication cable, or a transport pipe for gas, liquid, etc.

In FIG. 1, when twisting each of the elongated bodies 22a to 22c, each forming machine 2A to 2C uses forming rollers 14s to 14u and 17s to 17u according to the material, shape, type, etc. of these elongated bodies 22a to 22c. In addition to being selected, the forming roller 14s may be
-14, 17s-17u are adjusted via adjustment units 13s-13u, 16s-16u, respectively.

As described above, after each of the molding machines 2A to 2C has been prepared in advance, each of the elongated bodies 22a to 22c unwound from the winding machine 1 is fed toward the molding machines 2A to 2C, and then It is introduced into the molding machines 2A to 2C.

These molding machines 2A to 2C have housings 9
is alternately rotated clockwise and counterclockwise via a rotational drive mechanism 19 and a transmission mechanism 20, and in each of the molding machines 2A to 2C, the movable support member 15 is rotated via an intermittent motion mechanism 18. It reciprocates toward the fixed support member 12, and both members 12 and 15 are intermittently opened.

The elongated body 2 is transferred to the molding machines 2A to 2C in such an operating state.
2a to 22c are introduced, and the elongated bodies 22a to 22c are
When the long bodies 22a to 22c arrive between the forming rollers 14s to 14u and 17s to 17u, the elongated bodies 22a to 22c are bent and formed under pressure from the forming rollers 14s to 14u and 17s to 17u, and the bent shape is the same as that of the housing 9. said rotational movement in a clockwise direction;
Since the displacement is in the counterclockwise direction, the molding machines 2A to 2
Each of the elongated bodies 22a to 22c at the time of leaving C is finished in a desired reciprocating spiral shape.

At this time, forming rollers 14s~14u, 17s~
17u, and the movable support member 15 is intermittently opened, so that each elongated body 22a
~22c is not twisted.

In order to more reliably prevent twisting, a synchronization mechanism that rotates the housing 9 when the space between the fixed support member 12 and the movable support member 15 is opened may be provided across the intermittent movement mechanism 18 and the rotational drive mechanism 19. .

Each elongated body 22 is given a reciprocating spiral shape in this way.
A to 22c enter the collecting machine 3, where they are assembled into a bundle, and then the aggregate 23 is bound in the next wrapping machine 4 with a binding material 24 such as tape or thread.

Thereafter, the bundled aggregate 23 is taken up by the take-up 5 and wound up by the take-up 6, but by interlocking the take-up machine 5 and the rotation drive mechanism 19 via the interlocking mechanism 21, a constant A reciprocating spiral of pitches is formed.

In addition, when obtaining a power cable, an optical communication cable, etc. as the above-mentioned bundled aggregate 23, each elongated body 22a is arranged so that the tension member 25 is interposed at the center of the twisting of each of the elongated bodies 22a to 22c.
22c, the tension member 25 may be supplied simultaneously.

Further, when bundling the aggregate 23, for example, a string-like inclusion is supplied by a supply means arranged between the collecting machine 3 and the wrapping machine 4, and the inclusion is transferred to the aggregate 23.
If the assembly 23 is tied vertically around the outer periphery of 3, its cross-sectional shape can be finished in a circular shape.

In addition, an extrusion coating machine is disposed between the take-up machine 5 and the winder 6, and the extrusion coater coats the outer periphery of the bound aggregate 23 with rubber or plastic, or the winder 6 winds it up. The subsequent assembly 23 may be extrusion coated by an extrusion coater on a separate line, and each forming roller
It may be of a drive type that rotates in the direction of feeding the elongated body.

FIG. 3 shows the aggregate 23 obtained as described above and cross sections of various parts of the aggregate.

As is clear from the figure, when following the cross-sectional view of the twisted aggregate 23 from the left end to the right end, there are alternating left spirals and right spirals, and these spiral angles are 180 degrees. It's summery.

In order to improve the bending properties of the twisted aggregate 23, it is desirable that the helical angle is 360 degrees or more, but when considering the ease of assembly, it is better not to make the helical angle too large. The optimal range is set depending on the type of body.

Although the above-mentioned twisted aggregate 23 appears to be twisted in both directions, it is not actually twisted, but is merely subjected to bending with different phases.

"Effects of the Invention" As explained above, when using the method of the present invention,
Since it is not limited to known winding frames, it is possible to obtain extremely long twisted aggregates, and compared to conventional examples in which only right-handed spirals or only left-handed spirals are continuous, the length of the rotating part is Since the moment of inertia is small, line speed can be increased and productivity can be increased.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing one embodiment of the method of the present invention, FIG. 2 is a schematic explanatory diagram of the molding machine in the same as above,
FIG. 3 is a side view of an aggregate twisted together according to the method of the present invention and a sectional view of each part thereof. 1... Feeding machine, 2A to 2C... Molding machine, 3...
Collecting machine, 4... Exterior machine, 5... Taking machine, 6... Winding machine, 9... Housing of the forming machine, 11... Bending mechanism of the forming machine, 12... Fixed support member of the forming machine,
14s to 14u... Forming roller, 15... Movable support member of the forming machine, 17s to 17u... Forming roller, 22a to 22c... Elongated body, 23... Aggregate, 24... Binding material, 25... tension member.

Claims (1)

[Claims] 1. While continuously feeding a plurality of elongated bodies in parallel with each other from the supply side to the winding side, forming each of the plurality of elongated bodies into a reciprocating spiral shape, and A method for twisting elongated bodies, which comprises: assembling the formed elongated bodies vertically against each other, and maintaining the aggregated state of the aggregate. 2. When feeding multiple long bodies in a predetermined direction,
A method for twisting elongated bodies according to claim 1, wherein each elongated body is fed out together with a tension member interposed at the center between the elongated bodies. 3. The elongated body according to claim 1, wherein the elongated bodies are formed into a reciprocating helical shape with a constant pitch by repeatedly bending the elongated bodies with their phases shifted from each other without giving any twist to each elongated body. How to twist. 4. The method of twisting elongated bodies according to claim 1, wherein the aggregate is bound with a binding material such as tape or thread when maintaining the assembled state of the aggregate. 5. Twisting of the elongated body according to claim 1, in which, when maintaining the assembled state of the aggregate, the aggregate is bound with a binding material such as tape or thread, and the outer periphery of the aggregate is further covered by extrusion coating means. How to match. 6. A method for twisting elongated bodies according to claim 4 or 5, wherein an inclusion is interposed between the outer periphery of the aggregate and the binding material.