JP2014235846A - High frequency cable production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency cable production device causing no shape fluctuation to a waved tube.SOLUTION: Provided is a high frequency cable production device comprising: a delivery apparatus 2; a waving apparatus 5 subjecting a tube body 3 delivered from the delivery apparatus 2 to waving to produce a waved tube 4; a take-off apparatus 6 provided at the downstream side of the waving apparatus 5 and taking off the waved tube 4; a sensor 7 detecting the sagging of the waved tube 4 on the upstream side than the take-off apparatus 6; and a controller 8 controlling the take-off apparatus 6 in such a manner that the sagging detected by the sensor 7 is made certain.

Description

  The present invention relates to a high frequency cable manufacturing apparatus for manufacturing a high frequency cable having a corrugated tube.

  As shown in FIG. 4, some high-frequency cables 50 for transmitting high-frequency signals have a corrugated tube (corrugated tube) 4. The high-frequency cable 50 is formed by corrugating a copper pipe 51 that constitutes an internal conductor, an insulator 52 made of foamed polyethylene or the like coated on the copper pipe 51, and provided outside the insulator 52. The corrugated tube 4 and the outer insulating layer 53 covered with the corrugated tube 4 are provided. The corrugated tube 4 constitutes an outer conductor. Further, the corrugated tube 4 has an elliptical or circular cross section.

  The high-frequency cable 50 is required to have strict performance such as low transmission loss and voltage standing wave ratio (VSWR) characteristics as electrical characteristics.

  As shown in FIGS. 4 and 5, the high-frequency cable manufacturing apparatus 54 is in the form of a strip so that both edges in the width direction of the copper tape 12 are close to the outer periphery of the core member 9 including the copper tube 51 and the insulator 52. A tube forming apparatus 15 that gradually winds in a cylindrical shape to surround and coat the core member 9, a welding torch 16 that welds both sides of the copper tape 12 to form a tubular body 3 having a longitudinal seam, and a tubular body 3. Is sent out in the direction of arrow A, the corrugated device 5 that forms a corrugated tube 4 by corrugating the tube 3 delivered from the feed device 2 in a ring shape, and the corrugated tube 4 is wound up. A winding device 55 that winds around the drum 46.

  Further, between the corrugating device 5 and the winding device 55, in order to absorb the linear velocity unevenness caused by the drum surface of the winding drum 46 being non-uniform or the winding drum 46 being distorted. Dancers 29 are arranged. The dancer 29 adjusts the winding speed by moving up and down to suppress fluctuations in the tension of the corrugated tube 4.

Japanese Patent Laid-Open No. 2003-197050 JP-A-6-20540 JP-A-6-20541

  However, since the dancer 29 swings up and down according to the distortion of the winding drum 46 and the like, a tension fluctuation occurs due to the inertia of the dancer 29, and this tension fluctuation is caused by the corrugated tube 4 and the corrugating apparatus. 5, the pitch of the waves formed by the corrugating device 5 (hereinafter referred to as the wave pitch) fluctuates, and there is a problem that the wave pitch cannot be made highly uniform over a long length.

  If the wave pitch of the corrugated tube is not uniform or if there is a periodic fluctuation in the wave pitch, reflection of transmitted radio waves is likely to occur, resulting in poor electrical characteristics and further improving voltage standing wave ratio characteristics. I can't.

  Therefore, an object of the present invention is to provide a high-frequency cable manufacturing apparatus that does not cause a shape variation in a corrugated tube in order to maintain and improve the electrical characteristics of the cable.

  The present invention devised to achieve this object includes a delivery device, a corrugation device for producing a corrugated tube by corrugating a pipe body delivered from the delivery device, and a downstream side of the corrugation device. A take-off device for picking up the corrugated pipe, a sensor for detecting the slack of the corrugated pipe upstream from the take-up apparatus, and controlling the take-up apparatus so that the slack detected by the sensor is constant. A high-frequency cable manufacturing apparatus.

  The take-up device may include a pair of balloon-like take-up heads that sandwich the corrugated tube, and a pressure regulator connected to the take-up head.

  The take-up head may be made of rubber or polyethylene.

  The sensor may be a non-contact distance detection sensor, and may be provided above the corrugated tube in the gravity direction or below the gravity direction.

  The take-up device may include a rotation shaft, and the take-up head may be provided on the rotation shaft.

  The rotating shaft may be provided with a regulating member that regulates expansion of the take-up head in the axial direction.

  ADVANTAGE OF THE INVENTION According to this invention, in order to maintain and improve the electrical property of a cable, the high frequency cable manufacturing apparatus which does not produce a shape fluctuation | variation in a corrugated pipe can be provided.

It is a side view of the high frequency cable manufacturing apparatus concerning the present invention. It is a principal part control system diagram of the high frequency cable manufacturing apparatus which concerns on this invention. It is an AA arrow directional view of Drawing 1 concerning the present invention. It is explanatory drawing of a high frequency cable. It is a side view of the high frequency cable manufacturing apparatus which concerns on a prior art.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, about the structure similar to the conventional high frequency cable manufacturing apparatus etc. which were described in background art, the same code | symbol is attached | subjected and description is abbreviate | omitted. Further, the upper and lower sides in the embodiments described later are based on the direction of gravity. For example, the upper direction in the gravity direction is simply referred to as the upper direction. The lower part in the direction of gravity is simply called the lower part.

  As shown in FIGS. 1 and 2, the high-frequency cable manufacturing apparatus 1 according to the present embodiment produces a corrugated pipe 4 by corrugating the delivery apparatus 2 and the pipe body 3 delivered from the delivery apparatus 2. A corrugating device 5, a take-up device 6 provided on the downstream side of the corrugating device 5 to take up the corrugated tube 4, a sensor 7 for detecting slack in the corrugated tube 4 upstream of the take-up device 6, and a sensor 7. And a control device 8 for controlling the take-up device 6 so that the detected slack is constant.

  On the upstream side of the delivery device 2, a core member delivery device 10 for delivering the core member 9, a core member take-up device 11 for taking up the core member 9, a copper tape delivery device 13 for delivering the copper tape 12, and a copper tape 12 Are provided with a trimming cutter 14 that cuts and trims the tube to a predetermined width, a tube forming apparatus 15, a welding torch 16, and a drawing die 17 that adjusts the shape of the tube body 3. Also, a core member dancer 18 is provided between the core member delivery device 10 and the core member take-up device 11 and between the core member take-up device 11 and the tube forming device 15. Furthermore, a copper tape dancer 19 is provided between the copper tape feeding device 13 and the trimming cutter 14.

  The delivery device 2 includes an upper delivery unit 20 and a lower delivery unit 21 for driving the tube 3 from above and below, an upper delivery drive motor M1 that drives the upper delivery unit 20, and a lower delivery unit 21 that drives the lower delivery unit 21. A delivery drive motor M2. The upper sending unit 20 and the lower sending unit 21 are endless tracks. The upper delivery drive motor M1 and the lower delivery drive motor M2 are inverter motors. The upper delivery drive motor M1 and the lower delivery drive motor M2 may be motors capable of speed adjustment, and may be, for example, direct current motors.

  The corrugating device 5 cools the forming head 22 for corrugating the tube 3 fed by the delivery device 2, the forming head driving motor M 3 for driving the forming head 22, the forming head 22 and the corrugated tube 4. And an oil cooling / circulation unit 23. Although not shown, the forming head 22 has a corrugated forming die that rotates around the tube body 3. The corrugated forming die is adapted to corrugate the tubular body 3 by pressing the outer peripheral surface of the tubular body 3. The oil cooling / circulation unit 23 reduces heat generation (processing heat) generated when the pipe body 3 is waved. The oil cooling / circulating unit 23 applies an oil to an oil tank 24 that contains oil, a pump 25 connected to the oil tank 24, a pump 25 connected to the pump 25, and collects the oil flowing down from the molding head 22. And a forming head cooling section 26 that returns the oil tank 24 to the oil tank 24. The oil cooling / circulating unit 23 continuously applies oil to the forming head 22 and the corrugated pipe 4, and further cools and circulates the oil. Thereby, the temperature of the oil is controlled to a constant temperature.

  As shown in FIGS. 1 and 3, the take-up device 6 includes a pair of balloon-like take-up heads 27 that sandwich the corrugated tube 4, and a pressure regulator 28 connected to the take-up head 27.

  The take-up head 27 is made of rubber or polyethylene. That is, the take-up head 27 has elasticity. The take-up head 27 can gently wrap the corrugated tube 4 by being filled with air or gas at a low pressure, and can absorb and cut off the tension fluctuation caused by the swing of the dancer 29 on the downstream side. Yes. The take-up head 27 can take up the corrugated tube 4 by being rotated.

  The pressure regulator 28 consists of a precision regulator. An air supply device (not shown) for supplying air or a gas supply device (not shown) for supplying a gas such as an inert gas is connected to the pressure regulator 28. The pressure regulator 28 has a function of managing the pressure of air or gas that is constantly supplied into the take-up head 27 at a constant level. The take-up head 27 is easily deformed, and the take-up speed fluctuates even if it rotates at a constant speed. The pressure regulator 28 reduces the fluctuation of the take-up speed by managing the pressure of air or gas supplied to the take-up head 27 to be constant.

  The take-up device 6 includes a rotary shaft 30, and the take-up head 27 is provided on the rotary shaft 30. As a result, the take-up head 27 is configured to rotate stably integrally with the rotary shaft 30.

  The rotation shaft 30 is disposed in parallel as a pair. A take-up head 27 is provided at the tip of the rotary shaft 30. The rotary shaft 30 is provided with a first drive motor M4 and a second drive motor M5 separately. That is, the rotary shafts 30 are driven independently. The first drive motor M4 and the second drive motor M5 are inverter motors, and the rotation speed is adjusted by the control device 8. The first drive motor M4 and the second drive motor M5 may be motors capable of adjusting speed, and may be, for example, DC motors. A part (not shown) of a flow path 31 that connects the pressure regulator 28 and the take-up head 27 is formed on the rotary shaft 30. A part of the flow path 31 is connected to the upstream flow path 31 via a rotary joint 32.

  The rotary shaft 30 is provided with restricting members 33 and 34 for restricting the expansion of the take-up head 27 in the axial direction.

  The regulating members 33 and 34 are formed in a disc shape, and are provided in a pair on the rotating shaft 30 so as to be separated in the axial direction. The take-up head 27 is disposed between the pair of regulating members 33 and 34. Irregular deformation of the take-up head 27 is prevented by restricting expansion of the rotary shaft 30 in the axial direction. Thereby, the take-up head 27 can take up the corrugated tube 4 stably.

  The take-up device 6 includes a support frame 35, a guide rail 36 provided on the support frame 35 and extending vertically, and an upper linear guide that is provided on the guide rail 36 so as to be movable up and down and rotatably supports the rotary shaft 30. 37, a lower linear motion guide 38 that is provided on the guide rail 36 below the upper linear motion guide 37 so as to be movable up and down, and rotatably supports the rotary shaft 30, and a pair of rotary shafts 30 so as to be closely spaced from each other. And an operation unit 39 to be moved. The operation unit 39 includes a feed rod 40 that is rotatably supported by the support frame 35 and extends in the vertical direction, and a handle 41 that is provided at the upper end of the feed rod 40 and rotates the feed rod 40. Male screw parts 42 and 43 opposite to each other are formed on the upper and lower parts of the feed rod 40. Further, the piece members 44 engaged with the rotating shaft 30 are respectively screwed into the male screw portions 42 and 43. The piece member 44 approaches or separates from each other as the feed rod 40 rotates, and the pair of rotating shafts 30 approach or separate from each other.

  The sensor 7 is a non-contact type distance detection sensor, and is provided above or below the gravitational direction of the corrugated tube 4. The sensor 7 detects the height at which the change in the sag is most prominent, that is, the position at which the sag of the corrugated tube 4 is the lowest.

  The control device 8 feedback-controls the first drive motor M4 and the second drive motor M5 so that the value detected by the sensor 7 is constant.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 1, the core member 9 sent out from the core member sending device 10 is sent to the tube forming device 15 through the core member dancer 18, the core member take-up device 11, and the core member dancer 18. On the other hand, the copper tape 12 delivered from the copper tape delivery device 13 is sent to the tube forming device 15 through the copper tape dancer 19 and the trimming cutter 14. The trimming cutter 14 cuts the copper tape 12 into a predetermined width. The remaining material cut by the trimming cutter 14 is taken up by the scrap winder 45.

  The copper tape 12 sent to the tube forming apparatus 15 is gradually wound into a cylindrical shape so that both edges in the width direction approach each other. The core member 9 is taken into the center of the copper tape 12 wound in a cylindrical shape, and is formed in a substantially annular shape on the outer surface side of the core member 9.

  Thereafter, the seam extending in the longitudinal direction of the copper tape 12 is butt welded by the welding torch 16. Thereby, the tubular body 3 (smooth tubular body) having a weld seam extending in the longitudinal direction is formed.

  Thereafter, the tube 3 is shaped by the drawing die 17 and is moved in the direction of arrow A by the delivery device 2.

  As shown in FIGS. 1 and 2, the tubular body 3 is sent to the corrugation device 5 and subjected to corrugation processing. At this time, the forming head drive motor M3 rotates the forming head 22 at a predetermined speed, and corrugates the tube body 3 with a predetermined pitch and a predetermined diameter. Further, oil is continuously applied to the forming head 22 and the corrugated tube 4 pushed out from the forming head 22. The oil cools the forming head 22 and the corrugated tube 4 extruded from the forming head 22.

  The corrugated tube 4 pushed out from the corrugating device 5 reaches the take-up device 6 while being slackened, and is taken up by the take-up device 6. At this time, since the corrugated tube 4 is slack between the corrugating device 5 and the take-up device 6, the tension applied to the corrugated tube 4 is corrugated tube 4 between the corrugating device 5 and the take-up device 6. The weight is only very low (self-weight). Further, the sag of the corrugated tube 4 is detected by the sensor 7. The control device 8 controls the take-up device 6 so that the slack detected by the sensor 7 is always constant. Specifically, the tension fluctuation from the downstream side acting on the corrugated device 5 is detected by the sensor 7 as a change in the slack of the corrugated pipe 4. The sensor 7 issues the detected sag as a signal to the control device 8, and the control device 8 feedback controls the rotational speeds of the first drive motor M4 and the second drive motor M5 so that the detection value of the sensor 7 becomes constant. To do. For example, the sag of the corrugated tube 4 between the corrugating device 5 and the take-up device 6 increases, and the distance between the sensor 7 and the corrugated tube 4 is set in advance in the control device 8 (control set distance). When it becomes larger, the control device 8 increases the rotation speeds of the first drive motor M4 and the second drive motor M5. Conversely, when the sag of the corrugated tube 4 is reduced and the distance between the sensor 7 and the corrugated tube 4 is less than a predetermined distance, the control device 8 decreases the rotational speeds of the first drive motor M4 and the second drive motor M5. . As a result, the tension acting on the forming head 22 can be stably maintained at a constant very low tension, and waves of a predetermined pitch can be stably applied to the tube body 3.

  Further, since the take-up device 6 takes up while gently wrapping the corrugated tube 4 with a balloon-like take-up head 27 filled with air or the like with a slight pressure, even if the dancer 29 on the downstream side swings, Tension fluctuations can be absorbed and propagation of tension fluctuations upstream can be cut off. Furthermore, the corrugated tube 4 is coated with oil, and the corrugating device 5 and the take-up device 6 are arranged as close as possible, so that the oil removal space is not sufficient, and further, it is extremely difficult to remove the oil. Since the tension cannot be applied to the corrugated tube 4, the corrugated tube 4 is in a slippery state with oil attached. However, since the corrugated tube 4 is gently wrapped with the balloon-shaped take-up head 27, high frictional force is obtained. And a sufficient take-up force can be secured.

  Thereafter, the corrugated tube 4 sent out from the take-up device 6 is wound around the winding drum 46 while being tensioned by the dancer 29.

  As described above, the high-frequency cable manufacturing apparatus 1 includes the delivery device 2, the corrugation device 5 for producing the corrugated tube 4 by corrugating the pipe body 3 delivered from the delivery device 2, and the downstream of the corrugation device 5. A take-up device 6 provided on the side for picking up the corrugated tube 4, a sensor 7 for detecting the slack of the corrugated tube 4 upstream of the take-up device 6, and a take-up device so that the slack detected by the sensor 7 is constant. 6 is provided with a control device 8 that controls the corrugation 6, the absolute value of the tension fluctuation that affects the corrugation processing can be minimized, and the corrugation processing accuracy can be increased. Can be prevented from changing in shape. And the wave pitch of the corrugated pipe | tube 4 becomes uniform, and a voltage standing wave ratio characteristic can be improved.

  Further, since the take-up device 6 includes a pair of balloon-like take-up heads 27 that sandwich the corrugated tube 4 and a pressure regulator 28 connected to the take-up head 27, the fluctuation in tension propagated from the downstream side is cut off. Even if it is the corrugated tube 4 to which oil adhered, it can be taken out stably.

  Since the take-up head 27 is made of rubber or polyethylene, the corrugated tube 4 can be gently and softly wrapped in a wide area, and the tension fluctuation propagating from the downstream side can be cut off more favorably. Furthermore, it can take over stably.

  Since the sensor 7 is composed of a non-contact type distance detection sensor and is provided above the corrugated tube 4 in the gravitational direction or below the gravitational direction, the slack of the corrugated tube 4 is surely applied without applying a force to the corrugated tube 4. Can be detected.

  Since the take-up device 6 includes the rotary shaft 30 and the take-up head 27 is provided on the rotary shaft 30, power can be reliably transmitted to the take-up head 27, and the rotation of the take-up head 27 can be controlled well.

  In the above-described embodiment, the high-frequency cable manufacturing apparatus 1 that manufactures a high-frequency coaxial cable in which the copper pipe 51 and the corrugated pipe 4 are coaxially disposed has been described. However, the present invention is a high-frequency cable that manufactures a coaxial cable. The manufacturing apparatus 1 is not limited to this. The present invention may be any high-frequency cable manufacturing apparatus that manufactures a high-frequency cable having corrugated tubes 4.

  The take-up head 27 sandwiches the corrugated tube 4 from above and below, but is not limited thereto. As long as the corrugated tube 4 can be supported at a certain height, the corrugated tube 4 may be sandwiched from the left and right in the horizontal direction, or may be sandwiched from other directions.

  Further, the sensor 7 is made of a non-contact type distance detection sensor, but may be made of another type of sensor as long as slack can be detected. However, a non-contact sensor is preferable.

DESCRIPTION OF SYMBOLS 1 High frequency cable manufacturing apparatus 2 Sending apparatus 3 Tube 4 Corrugated pipe 5 Corrugated apparatus 6 Take-out apparatus 7 Sensor 8 Control apparatus 22 Forming head 28 Pressure regulator 30 Rotating shaft 33 Restricting member 34 Restricting member

Claims (6)

A sending device;
A corrugating device for producing a corrugated tube by corrugating the tube fed from the delivery device;
A take-off device that is provided on the downstream side of the corrugating device and takes up the corrugated pipe;
A sensor for detecting slack in the corrugated pipe upstream from the take-up device;
A control device for controlling the take-up device so that the slack detected by the sensor is constant;
A high-frequency cable manufacturing apparatus characterized by comprising: The take-up device is
A pair of balloon-shaped take-up heads sandwiching the corrugated tube;
A pressure regulator connected to the take-up head;
The high frequency cable manufacturing apparatus of Claim 1 provided with these.   The high-frequency cable manufacturing apparatus according to claim 2, wherein the take-up head is made of rubber or polyethylene.   The high-frequency cable manufacturing apparatus according to any one of claims 1 to 3, wherein the sensor is a non-contact type distance detection sensor and is provided above or below the gravitational direction of the corrugated tube.   The high-frequency cable manufacturing apparatus according to claim 2, wherein the take-up device includes a rotation shaft, and the take-up head is provided on the rotation shaft.   The high-frequency cable manufacturing apparatus according to claim 5, wherein the rotating shaft is provided with a regulating member that regulates expansion of the take-up head in the axial direction.

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