JPH01241506A - Diameter reducing method for pipe containing wire body - Google Patents

Abstract

PURPOSE:To insert an electric conductor or optical fiber into a long-sized pipe by moving an internal wire body by the elongation length of the pipe by diameter reduction. CONSTITUTION:While the coil of the pipe 12 is vibrated, an end of the pipe 12 is reduced in diameter through a die 22 to a specific external diameter. In this case, when the die 22 and a spool take-up machine is turned along the external surface of the coil so that a coil is unwound from the external surface of a bobbin 13, the wire body 3 is pulled by the pipe 12 and taken up around a spool 28 while strained. The diameter reduction die 22 in a diameter reducing stroke and pipe 12 are put in reciprocal motion at a certain angle to the moving direction of the pipe 12 to transmit vibration from a coil pipe to the pipe 12 and then the wire body 3 in the pipe moves forth in the pipe by being given a conveying force in the pipe forward movement direction from the pipe internal wall intermittently, so that a wire body 3 outside the pipe is drawn into the pipe. Consequently, the wire body 3 is moved smoothly into the pipe without being strained.

Description

[Detailed description of the invention] (Industrial application field) This invention is a linear object inserted during the tube cremation process.

Or related to a method for reducing the diameter of a linear object that has already been inserted into a pipe, or while transferring the linear object without distortion or damage, when reducing the diameter of the object while reducing the gap while continuously inserting the object. In detail, by reducing the diameter of a protective vibrator such as an electric wire cable or bare optical fiber inserted into a flexible protective vibrator or a sheath, it is possible to create a long electric wire cable or fiber with less clearance. A method for manufacturing cords.

In this invention, the linear objects refer to electric wires, cabtire cables, optical fibers, ceramic fibers, etc., and the electric wires and cables are metal wires whose surfaces are coated with PVC or the like. single core,
Optical fiber refers to multi-core fibers and stranded fibers, and refers to fibers consisting of a core and cladding layer, the surface of which is coated with synthetic resin, metal, or ceramic. refers to strands of ceramic or natural thread.

(Problems with conventional technology) Communication cables (with synthetic resin coating) that have become widely used in recent years are 9. - With the development of modern science, the 9 entrances have become denser, and the designs have become more elaborate and diversified, such as 6-story buildings, 9 underground power substations, and 6-ura complexes. )・There is a tendency for wires, wires, and cables to become more and more grouped and become more and more 1M.

Once a fire occurs, these optical fibers.

Electric wires and cables can become a medium for the spread of fire, causing the fire to spread. Especially when there is a recent fire trend.

Precious human lives and precision equipment are lost due to the smoke containing toxic scum generated.
! This leads to equipment loss and develops into a major social problem. Metal-coated electric cables are flame-retardant, have good fire resistance, and are resistant to noise. Optical fibers also have mechanical strength and are susceptible to heat distortion and fire, so metal-coated cables are similarly used to protect the inside of pipes in the event of a fire. Do not allow oxygen to enter the tube to prevent the coating of the optical fiber from burning.

There is a growing demand for cables with metal sheathing that have fewer gaps and are completely smoky.

Conventionally, as a method for producing electric wires or optical fibers passed through tubes such as metal tubes, there is a buzzing insertion method (Japanese Unexamined Patent Publication No. 62-44010), but it is necessary to increase the gap between the tube and the inside of the tube. If the tube is not removed, it will be difficult to insert the tube, especially if the diameter is small (2 mm or less), the insertion speed and insertion length will be extremely reduced, and the insertion will stop halfway inside the tube, reducing productivity. 9 In terms of quality, if the gap is large, the extra length A method for manufacturing metal-coated optical fibers using 8-layer roll forming, which causes defects such as distortion in the fiber and increased transmission loss (waiting registration 1301).
467) is known. In this method, a metal tape is formed into a tube shape, and while manufacturing a tube by welding both side edges of the tape, an optical fiber is inserted and the tube is reduced to a predetermined outer diameter.

The problem with this is that when the optical fiber passes through the welding point, it is easily affected by the welding heat and deteriorates in quality, and if the pipe diameter is small (2 SW or less), it is difficult to insert it unless a large gap is created technically. This is difficult, and during the diameter reduction process, the inner fiber is forcibly dragged as it is inserted due to the expansion of the outer metal.As the fiber is made of quartz glass, it is susceptible to stretching and can be scratched, resulting in transmission loss. Increased disadvantages occur.

In addition, another method is the tube insertion method (for example, JP-A-58-
25606) is known. In this method, an aluminum tube with a steel wire inserted into the tube is manufactured, the tube is reduced in diameter, and the steel wire inside the tube is then replaced with an electric wire or optical fiber. The problem with this is that the manufacturing process becomes complicated;
Alternatively, since there is a risk of wire breakage, it is not possible to use an exchange force greater than the strength of the fiber, so there is a drawback that it is difficult to use a fiber with a long length exceeding, for example, 30 m.

Therefore, the present invention can be applied to electric wires, optical fibers, etc. in certain gaps (in the range of 0 to 0.5n+m) without deterioration.

It is also an object of the present invention to provide a method for inserting electric wires or optical fibers into long tubes (up to 1100K) without causing explosions.

(Means for Solving the Problems) When inserting into the pipe containing the linear material used in this invention or the pipe containing the linear material, first of all, when the length is particularly long (20 km or more), a metal coil wound into a flat plate is rolled into a long flat. The tape is formed into a tube with forming rolls, and the tape is welded on both sides to produce a tube, while a linear object is inserted.

Manufactures linear recoil tubes.

As another method, a coiled tube containing a linear object is manufactured by a vibration insertion method in which a linear object is inserted into the tube from one end of the tube with a sufficient gap. When reducing the diameter of the above-mentioned wire-filled tube, the tube is wound around a bobbin in a coil shape and fixed on a vibration table, and the bobbin is vibrated at a certain angle so that any point on the tube reciprocates. The inner wire is transferred, the end of the tube is passed through a die, and the die is rotated along the outer surface of the bobbin in a direction to unwind the coil, while being wound onto a spool and reduced to a predetermined outer diameter. At this time, the linear object inside is moved by vibration or the like by the length of the elongation of the tube due to the diameter reduction process.

The transfer vibration of the vibration method vibrates the tube in such a way that the absolute value of the maximum acceleration of the tube during the forward stroke is greater than that during the backward stroke. Further, in order to vibrate the tube as described above, the tube is vibrated at a certain angle so as to move forward using a spring, a vibrating piezoelectric element, etc., and at the above SvI.

The frequency is 10 to make it easier to transfer linear objects into the pipe.
~300Hz.

Total amplitude is 0.1mm or more.

A vibration angle of 15 degrees is desirable.

In addition, as another means for transporting the linear object within the pipe, pressurized fluid may be used as shown in Figure ': A2.

(Function) A tube containing a linear material is wound into a coil to form a layered body on a bobbin, and the coil of the tube is vibrated so as to move 1M forward along a spiral path from an arbitrary point on the tube. Then, while applying the vibration to the coil of the tube, the terminal end of the tube is passed through a die to reduce the outer diameter to a predetermined outer diameter.

In that case, if the bobbin coil is unraveled from the outer surface, the spool winder is rotated along the outer surface of the coil, and as a result, the diameter of the tube is continuously reduced and the tube is elongated in the longitudinal direction. . At that time, the wire is dragged by the tube and wound onto the spool with distortion, so vibrations are applied to the tube from the coiled tube so that the diameter reduction die and tube reciprocate at a certain angle with respect to the direction of movement of the tube. As long as the acceleration of the tube is small during the forward movement of the vibration, the linear object inside the tube is dragged by the tube due to the frictional force inside the tube and moves forward as a unit.

When the vibrational acceleration of the pipe, that is, the acceleration of the linear object, gradually increases and the inertial force of the linear object due to the acceleration exceeds the maximum value of the frictional force, the linear object slides on the inner wall surface of the pipe, jumps, and contracts. Advance inside the tube being drawn. While moving forward, the speed of the linear object relative to the tube gradually decreases due to friction between it and the inside wall surface of the tube whose diameter has been reduced.

Finally, the tube is reduced to a predetermined outer diameter, and in the backward stroke of the vibration, if the magnitude of the acceleration is sufficiently small, it slides on the inner wall surface of the tube and slides against the tube. In this way, the linear object inside the pipe is intermittently given a conveying force in the direction of pipe bending from the inner wall of the pipe, and moves forward inside the pipe, drawing the linear object outside the pipe into the pipe. The linear object is smoothly transferred into the tube, reduced to a predetermined outer diameter at the same speed as the tube, and then wound onto a spool.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a side view of the entire apparatus of the present invention.

FIG. 2 is a linear material supply device using pressurized fluid, and FIG. 3 is a plan view showing a diameter reducing machine and a spool winding device. FIG. 4 is a diagram showing the driving principle of the piezoelectric vibrator.

FIG. 5 is an enlarged view of machining of different diameters using rollers.

FIG. 6 is a diagram showing how four vibrating piezoelectric elements are attached.

The internal teeth 20 of the slewing ring bearing shown in FIGS. 1 and 2 are inserted into the pedestal 19M4, and the pedestal 19 is fixed to the floor so as not to vibrate. Leaf springs t8 for supporting the vibration table 14 are attached to the four corners of the upper surface of the pedestal 19. On the trestle! At 9,
A square plate-shaped vibration table 1 is connected via a support spring plate 18.
4 is placed. Four amplifying resonant springs 15 extend downward from the lower surface of the vibration table 14, are overlapped with a supporting spring plate 18 and an amplifying resonant spring 15, and are fixed with bolts. Two vibrating piezoelectric elements 16 and 17 are attached to each support spring plate 18 below the vibrating table 4. FIG. 4 shows a diagram of the driving principle of the vibrating piezoelectric element, and the piezoelectric element 16
．． Apply voltage to 17.

Stretching force on one side16. On the other hand, the shrinking force 17 bends the spring plate. For vibration conveyance, an alternating voltage is applied to the piezoelectric element to cause bending vibration, and the resonance spring 15 for vibration amplification generates a large vibration, and the workpiece (mass point) 37 is moved as shown in FIG. Convey as 0-+d. The conveyance speed can be varied over a wide range by voltage 36 control.

Two vibrating piezoelectric elements 16 and 17 are attached to the support spring plate 18 below the vibrating table 14. each 4
The pairs of vibrating piezoelectric elements are in positions and postures rotated by 180 degrees relative to each other around the central axis 0 of the vibrating table 4, as shown in FIG. In addition, a pair of one-way piezoelectric elements is
parallel to the vertical plane containing these central axes,
Moreover, they are inclined at 75 degrees in opposite directions with respect to the surface of the vibration table 14. The vibrating piezoelectric element applies an excitation force in an oblique direction to these surfaces on the vibrating table 14 due to centrifugal force. These four pairs of vibrating piezoelectric elements are driven such that their vibration frequencies and imaging units match each other, and their excitation directions are shifted by 180 degrees from each other. Therefore, when the vibrations caused by the vibrating piezoelectric elements in April are combined, the vibrating table 14 vibrates along a spiral H whose central axis coincides with the central axis C of the vibrating table.

The bobbin 13 is fixed to the vibration table 14 so that the axis of the bobbin 13 coincides with the center axis C of the vibration table. A tube through which the wire 3 is inserted is wound around the bobbin 13 in a coiled manner, and the wire 3 is fed into the tube from the upper end of the coil of the tube 12. The outer peripheral edges of these lower flanges of the bobbin 13 are each fixed to the vibration table 14 with fixing bolts so that the bobbin 13 can reliably receive the vibrations of the vibrating piezoelectric element. As shown in FIG. 2, in order to make the bobbin a perfect circle, the bobbin is shaved so that there are no irregularities in the circumferential direction of the body and in the direction of the bobbin axis. When the tube is held close to the body.

The vibration of the bobbin 13 can be accurately transmitted to the tube, and the vibration insertion of the linear object 3 can be carried out smoothly and efficiently.

The supply spool 2 of the cotton material supply device is placed on the right side of the bobbin 13.
is located. The supply spool 2 is rotatably supported on a bearing stand. The supply spool 2 lets out the wire material 3 wound around it.

The linear material 3 is supplied to the tube 12 by a supply roller 6. A V8 motor 1 is arranged adjacent to the supply spool 2,
Supply spool 2 and drive motor 1 are operatively connected via a belt transmission.

The supply spool 2 is rotationally driven by the drive motor 1, and
! ? The linear object 3 is fed out and fed to the tube 12 wound around the bobbin 13. The rotation of the linear material supply spool 2 is driven independently, and a cotton material detection rod 10 is rotatably attached to the opening to control the speed of insertion of the material.

The tip of the cotton-like object detection rod 10 is bent, and the linear object 3 is hooked thereon. Further, an upper limit switch 8 and a lower limit switch 9 are attached to the lower part of the frame 4, and the lower end of the floc-like object detection rod 10 comes into contact with either of these limit switches 8.9. The cotton-like object detection rod IO detects slack in the linear object 3 and controls the feeding speed of the linear object 3. That is, tube 1
2 and the linear object 3, the advancing speed of the linear object 3 is not constant due to a change in the fluctuation rate of friction between the linear object 2 and the linear object 3.

If the advancing speed of the linear object 3 is faster than the feeding speed, the linear object 3 will be pulled backwards and cut, or its entry will be blocked. On the other hand, if it is too slow, there is a risk that the linear objects may become sagging and tangled within the pipe, which may obstruct entry.

Therefore, it is necessary that the linear object 3 has an appropriate amount of slack during insertion. Therefore, if the slack is too small, the cotton-like object detection rod 10 rotates clockwise and the lower limit switch 9 is activated. As a result.

The speed control device increases the voltage of the piezoelectric elements 16, 17 and increases the transport speed. On the other hand, if the slack is too large, the piezoelectric element +6. I? voltage drops and speed slows down,
The wire material 3 is always inserted into the tube 12 at a constant speed.Next, for the two-winding diameter reducing device 23, the bobbin 13
The inner tooth 2 of the slewing ring bearing is coaxial with the axis center C of the support spring 18 of
0 is fixed to the lower frame 19 along the outer circumference of the vibrating device of the bobbin 13. A bracket 27 in the form of a flat trapezoidal plate is attached to the upper surface of the rotating outer tooth 21 of the slewing ring bearing. The die box is vertically attached to a flat plate bracket 27, and the drive motor 26 of 23 and the vertical drive motor 29 of the take-up spool 28 are attached.

Spring device 15 for vibrating the bobbin 13. +6.17.1
8. is attached to the bottom of the vibration table 14.

Furthermore, the die box 23 and the take-up spool 28 are configured to rotate around the outer peripheral surface in the direction in which the conduit end of the coil 12 of the wound layer body is opened in the tangential direction E.
3 is a traverser mechanism 25 that moves the lower and upper ends of the wound layered coil 12 as shown in FIG. The drive motor 26 of the traverser is rotated and the die box 23 is continuously controlled to be lowered or raised as shown by I so that the movement can be controlled to follow the tube 12 by the diameter. The die box 23 has a structure in which the die 22 can be attached and detached from the top, and the die 22 is rotated on the outer surface of the pobbin 13 by the driving force of the zero-winding spool 28, which can be replaced with the required size, but the winding speed is determined by the piezoelectric element on the supply side. By controlling the speed of the linear object 3 according to the vibration amount of 16.17, the speed can be kept constant at all times, but the following control is incorporated in consideration of double safety control. The rotational speed of the take-up spool 28 is changed or stopped depending on the degree of diameter reduction of the pipe 12, the moving speed of the linear object 3 in the pipe, and the transfer state of the linear object 3 in the pipe. It incorporates control so that the linear material 3 can be wound within a transport speed range of 3. In other words, the linear material 3 can be maintained in the best condition without becoming too tight or sagging. As a result, the mechanism is such that the linear object 3 can be easily inserted without applying a load to the linear object 3 itself. Further, the vertical take-up spool 28 is removably attached to the shaft so that it can be replaced through the upper part. Further, the winding motor 29 is vertically attached and fixed to the bracket 27.

Next, a method for inserting a linear object into a tube using the apparatus configured as described above will be described.

In advance, the tube 12 is wound around the bobbin 13 in a coil shape to form the coil 12, and the supply spool 2 is also coated with resin on the twisted surface of the insulated wire core to provide flexibility. Also, roll it up.

The tube 12 is not limited to being wound in one layer around the bobbin 13, but is often wound in multiple layers. In this case, the first layer is in close contact with the surface of the body of the bobbin 13, but the second and subsequent layers are wound around the tube of the previous layer. It will fall between 12 and 12. Next, the coil shaft and vibration table 1
The bobbin 13 around which the tube 12 is wound is fixed on a vibration table so that the central axes C of the tubes 4 coincide with each other. and,
The linear material 3 is pulled out from the supply spool 2, and the distal end of the linear material 3 is inserted into the pipe inlet fitting 11 from the linear guide via the cotton material feeding state detection device 4. The tube inlet end 11 is located at the uppermost end of the coiled tube 12, and the linear object 3 is inserted into the coiled tube 12 along a substantially tangential direction. The linear object 3 is initially pushed into the coiled tube by 2 to 5 m. Due to this.

Due to the vibration of the tube 12, the linear object 3 is given sufficient conveying force by the inner surface of the tube, and the linear object 3 reliably enters the tube. Note that the pushing length (initial insertion length) is the inner diameter of the tube,
It is determined by the outer diameter of the linear object 3 and the coefficient of friction between the linear object and the inner wall surface of the tube. In the initial insertion, if the linear object 3 is inserted while applying vibration to the tube 12, the insertion becomes easier.

In addition, in order for the linear object 3 to smoothly enter the pipe, a certain degree of opening and closing is required between the linear object 3 and the 1.0
A value of mm or more is desirable.

Next, when the four pairs of vibrating piezoelectric elements 16 and 17 are driven.

Since the vibrating piezoelectric elements 16, 17 are mounted on the vibrating table 14 in the position and orientation as described above, the vibrating table 14 is subjected to a torque about the central axis C and a force in the direction of the central axis. As a result, any point on the vibration table 14 vibrates along the coil screw H. This vibration is further transmitted from the vibration table 14 to the linear object 3 via the fixing metal bobbin and the coil of the tube 12 in this order.

The movement of the linear object 3 changes depending on the type of vibration, the physical properties of the linear object 3, the inner diameter of the tube 12, etc., but it is thought that the linear object 3 moves inside the tube in the following manner. When the above-mentioned spiral vibration is applied to the pipe coil via the vibration table 14, the article conveying force of the vibration causes the upper part of the coil to be damaged at the pipe entrance end! The linear material 3 supplied from + continuously enters the pipe, that is, the linear material 3 is paid out from the supply spool 2 and is detected by the cotton material feeding state detection device 4. 11. coiled tube +
The diameter-reducing die 22 is sequentially moved from the 2° tube outlet end by stirring the coil, and is inserted through the entire coil after a predetermined period of time.

During the insertion of the above-mentioned linear object 3, if a fluctuation occurs in the insertion speed into the tube due to some factor, this will cause the feeding of the linear object at the position of the cotton-like object feeding state detection device 4 of the linear object 3. If the condition is affected and this is immediately detected by the detector 10, i.e. if the floc feeding condition detection device 4 detects an overtension of the wire 3, the signal is transmitted to the piezoelectric element 16.1.
7, the vibration speed is reduced so that the feeding speed of the linear material 3 is increased, and the winding speed of the fi6 diameter spool 28 is kept constant. If excessive sagging of the wire material 3 is detected, the vibration speed is similarly controlled to increase the feeding speed of the wire material 3, and the winding speed of the diameter reducing Nisboul 28 is always kept constant. In this way, an abnormal transport state of the linear object 3 is immediately detected, corrected, and restored to a normal transport state.

Place the empty spool 2 on the supply table, fix the tip of the metal tube, and add the final die 22. The diameter is reduced to a predetermined outer diameter 24. At this time, the metal tube 12 is extended in the traveling direction by the ratio of the diameter reduction process, so the linear object 3 inside is dragged by the tube 12 by that amount and goes inside with distortion. To prevent this, a vibrator is driven. hand.

When the vibrating piezoelectric elements 16 and 17 are vibrated so as to reciprocate the entire vibrating table 14, the linear object 3 in the tube is dragged by the tube 12 due to the frictional force inside the tube, and the linear object 3 in the tube has a small acceleration in the forward movement of the vibration. and move forward as one.

When the vibrational acceleration of the pipe 12, that is, the acceleration of the linear object 3, gradually increases, and the inertial force of the linear object 3 due to the acceleration exceeds the maximum value of the frictional force.

The linear object 3 slides on the inner wall surface of the tube and advances inside the tube whose diameter is being reduced. While moving forward, the linear object 3 gradually slows down relative to the tube 12 due to friction between it and the inner wall surface of the tube, and finally moves together with the tube 24 whose diameter has been reduced. In the backward stroke of the vibration, if the magnitude of the acceleration is kept sufficiently small, the linear object 3 inside the tube will not slide on the inner wall surface of the tube and move backward with respect to the tube 12. A conveying force in the direction of advancement of the tube surface is applied intermittently to advance the inside of the tube and draw the linear object 3 outside the tube into the tube.Therefore, the linear object 3 is transferred smoothly into the tube without distortion, and is the same as the tube 24. Once the speed is reached, the internal linear material is advanced, the necessary extra length is inserted, the diameter is reduced, and the wire is wound up at winder 4!128. In this case, the winding speed is determined by the linear material supply speed.

(Specific Example) In order to confirm the effect of the invention, a linear object was inserted into a tube under the following conditions using the apparatus shown in FIG. 1, and the diameter was reduced to a predetermined outer diameter.

(1) Device conditions: Frequency of piezoelectric element: 50H2 Vibration angle: °15 degrees @1. Ommmm linearity speed '300m/l (diameter reduction ratio; 3
Spool winding speed as approximately 0%: Approximately 1,570
m / It (2) Test materials and examples (diameter reduction processing and conventional comparison examples) 1, SUS pipe; outer diameter 5.0 m + w+, inner diameter 4.0 wm j2, linear object; outer diameter 3.0 mm +
(Coating) 3, After diameter reduction: Outer diameter 5.0m II hand → 4.21
-f Inner diameter 4. (lam+-+ 3.2mm$
(Product number chair)・19 Take-up spool speed; 1.5
70m/H5, tube flocculent insertion speed; 300m
/11 (Production capacity) 6.8 diameter speed; 1.
570m/H7, conventional insertion speed; 30m/ll
(Production capacity) 8, Production efficiency (compared to conventional); 5
Term 78 = Approximately 10 times In this specific example, the time to insert the wire into the coil wound on the bobbin directly affects production, so the conventional insertion speed (gap 0.2 m5) 30 m /
H, according to item 8, 10 times (the gap of the present invention 1.Ov
++), so only this number is the production efficiency.

Next, as another means of transferring the linear object 3, as shown in FIG. The linear object 3 is inserted into the tube by the frictional force of the fluid applied to the linear object 3 and the differential pressure. As the fluid 30 supplied to the pipe, pressurized fluid such as air or nitrogen gas is used. The linear object 3 is placed in a closed container 33 in advance and pressurized fluid is supplied. As a supply source of pressurized fluid, a pump or the like is used to pressurize the cylinder 30. As a method of controlling the conveyance speed of the linear object 3, an electromagnetic pressure regulating valve 31 is used. ! do.

In addition, as a means of processing the pipe containing the linear material 3 into a different diameter,
When wiring electric wires, etc. to the floor, wall, etc., as shown in Figure 1, it is easier to wire if the lower side of the wire is flat, and it can be fixed quickly.
The manufacturing method is to wind a semicircular tube 40 into a coil, and to create a circular wire 3 in a conventional J
Since it is difficult to insert the wire material 3 into the tube through a semi-circular die, the semi-circular die is rotated along the outer surface E of the coil while being wound on a spool to form a circular tube 9. Process into a semicircle.

Next, as shown in Figure 5, the outer skin of the tube is reduced in diameter at regular intervals.

As for the method of fixing the linear object 3 inside, a certain amount of clearance is required between the linear object 3 and the tube 12 (if there is no gap when bending, the linear object may break).

Particularly when used in a vibrating machine or when wiring electric wires or the like vertically, the wires 3 inside may move and cause damage, breakage, etc., and must be fixed for safety.

As shown in the figure, in order to fix the linear objects 3 at regular intervals, the terminal end of the tube is passed through a roller die 39 whose circumference is partially convex, and the roller die is rotated while rotating the die along the outer surface E of the bobbin. 39 to fix the internal linear object 3.

Furthermore, when using the conventional vibration filling method to insert both the wire material 3 and the powder into the tube 12, it is difficult to insert and fill the material densely. As a way to build this item, which cannot completely prevent the water running that occurs in submarine cables, we use powder and linear objects in certain gaps: 3
Pass the end of the tube into the die 22, turn the die 22 along the outer surface E of the coil, and reduce the outer diameter to a predetermined diameter. The linear material and powder are transferred and wound onto a spool 28 for manufacturing.

(Effects of the invention) High-rise buildings, hotels, hospitals, underground 2-power substations, petroleum]
With the development of modern science, the concentration of wealth at 9 entrances, such as 1-)
As equipment becomes more precise and diversified, the electric wires and cables used for it tend to become increasingly grouped and complex.

Once a fire occurs.

These electric wires and cables act as a medium for the spread of fire, causing the fire to spread. In particular, the recent fire outbreaks are causing serious social problems as the smoke containing toxic gases generated during fires causes loss of human life and precision machinery. Generally, in order to make the product flame-retardant, a cage-based flame retardant is added to the material, which generates a hydrogen chloride casing during combustion. Although it is designed to pass a vertical toe combustion test using a multi-strand cable, it produces black smoke and HCL during combustion.
According to the present invention, there is no control over the generation of highly corrosive poisonous cursing.
In addition, it is possible to produce fibers and cables with low flame resistance, low smoke, and is resistant to thermal distortion and mechanical cracking (can be inserted with a stable extra length of 0 to 0.5 z).
Moreover, a linear object can be inserted into a long tube (up to 100 km) without deterioration or damage. Furthermore, since the production method is simple, the linear product covered with the tube can be produced at low cost.

[Brief explanation of the drawing]

FIG. 1 is a side view of the entire apparatus of the present invention, FIG. 2 is a plan view, and FIG. 2 is a plan view of diameter reduction processing and spool winding. FIG. 3 is a diagram of a flocculent supply device using pressurized fluid, and FIG. 4 is a diagram of the driving principle of a piezoelectric vibrator. FIG. 5 is an enlarged view of machining of different diameters using rollers. l... Drive motor of the feeder, 2...-supply spool. 3... Linear material, 4... Cotton material feeding state detection device, 5
・・・：JXI adjustment point, 8 ・・・Ball limit, 9 ・・・Lower limit 10 ・・・Flot-like object detection rod, 11 ：Entrance check, 12 ・・・Pipe 13... - Bobbin, 14... Vibration table, 15... Amplification resonance spring. 16... Piezoelectric element (for elongation), 17... Piezoelectric element (
for compression), 18...-support spring plate, 19...-frame, 2
0...Swivel ring bearing internal teeth, 21...Swivel ring bearing external teeth,
22...Dice, 23...Dice box, 24.
...Pipe after diameter reduction, 25...Traverse, 26...Traverse drive motor, 27...Swivel motor fixing bracket, 28...Pipe take-up spool, 29...Take-up motor 3o addition To pressure bomb, 31...Electromagnetic nitall pressure regulating valve, 33...Airtight container, 36 Voltmeter, 37...Work (mass), 39...Roller die, 40...Recovery pipe. Figure 4 Director General of the Patent Office Yoshi 1) Number of sentences Tono 1. Display of the case Patent Application No. 68194 of 1988 2, Name of the invention Diameter reduction method for tubes containing linear objects 3, Person making the amendment Relationship to the case Applicant address 1-47-7 Chuo, Nakano-ku, Tokyo Postal code 164 Showa June 28, 1963, 5, Subject of amendment (1) Page 25 of the specification, line 20, after “Aru.”
The figure is a perspective view of a piezoelectric element portion. ” is inserted. (2) Submit a clearly drawn drawing as shown in the attached sheet.

Claims (1)

[Scope of Claims] (1) A tube in which a linear object is inserted at a certain gap is wound around a bobbin in layers, and the linear object inside is transferred while giving vibration to the bobbin, and the tube is The terminal end is passed through a die, and while the die is turned along the outer surface of the bobbin in the direction of uncoiling, the coil is wound onto a spool and reduced to a predetermined outer diameter.
A method for reducing the diameter of a tube containing a linear object, which is characterized in that the inner linear object is transferred by the length of the elongated tube due to the diameter reduction process. (2) A tube in which a linear object is inserted with a certain gap is wound around a bobbin in layers, and the linear object is transferred to the coil while flowing pressurized fluid into the tube from one end of the inlet of the tube. Pass the end of the tube through a die, turn the die along the outer surface of the bobbin in the direction of unwinding the coil, and reduce the diameter to the specified outer diameter while winding it onto the spool. A method for reducing the diameter of a pipe containing a linear object using pressurized fluid, the method comprising transferring the linear object inside the tube. (3) The terminal end of the pipe containing the linear material is passed through a die of different diameters, the die of different diameters is turned along the outer surface of the coil, and the coil is wound onto a spool while being processed to have different diameters. the method of. (4) In order to fix the linear objects at regular intervals from the surface, pass the end of the tube through a roller die whose circumference is partially convex, and while rotating the roller die along the outer surface of the bobbin, pipe the tube with the roller die. 3. The method according to claim 1 or 2, characterized in that the surface of the is processed to be concave and the linear object inside is fixed. (5) Pass the end of the tube containing powder and linear material in a rough state into a certain gap through a die, and perform diameter reduction processing by turning the die along the outer surface of the coil while closely reducing the diameter. 3. The method according to claim 1, wherein the linear object and powder inside the tube are transferred by the length of the tube.