DE102020115427A1 - Communication cable and method of making the same - Google Patents

Abstract

A communication cable (1) includes a plurality of shielded core wires (4) each of which comprises a core wire (2) containing an insulating material (22) covering a periphery of at least one conductor (21) individually or collectively, and a Shielding tape (3) wound lengthways to cover a periphery of the core wire (2). Each of the plurality of core wires (4) is arranged in such a manner that a winding end side edge (3a), which is one end in a width direction of the shielding tape (3) and outward from the longitudinally wound shielding tape (3), is arranged in a radial direction of the communication cable (1) with respect to a central position of the core wire (2) is arranged outside.

Description

Cross reference to the associated registration

The present patent application is based on Japanese Patent Application No. 2019-108968 , filed June 11, 2019, the entire contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION

This invention relates to a communication cable, such as a local area network (LAN) cable, and a method of manufacturing the same.

DESCRIPTION OF THE RELATED ART

Conventionally, a communication cable has been known which includes a plurality of shielded core wires each of which is composed of a shielding tape spirally wound around a twisted pair cable that is twisted together and a jacket provided around one To cover perimeter of the shielded core wires together. A tape containing a metal layer formed on a side surface of a resin sheet is used as a shield tape.

In recent years, a transmission speed has increased. For example, as the LAN cable, a communication cable having the category 7th or more, such as Category 7th or category 8th , fulfilled according to ISO / IEC 11801. However, in the communication cable as described above, crosstalk is caused due to an electric current flowing on the edge of the metal layer of the spirally wound shield tape. In particular, transmission properties such as crosstalk attenuation in a high-speed signal can deteriorate. Thus, it is difficult to meet the above standard. Therefore, the shield core wire in which the shield tape is wound in the longitudinal direction (ie, cigarette lapping) is proposed.

As a prior art document of the present application there is US-A1-2015 / 0096783 .

[Patent Document 1] US-A1-2015 / 0096783

SUMMARY OF THE INVENTION

However, sufficient transmission characteristics cannot be obtained by winding the shielding tape only in the longitudinal direction.

Accordingly, it is an object of the invention to provide a communication cable which improves a transmission characteristic in transmitting a high-speed signal, and a method of manufacturing the same.

• eine Vielzahl von abgeschirmten Kerndrähten, von welchen jeder einen Kerndraht umfasst, der einen Isolierstoff umfasst, der einen Umfang von wenigstens einem Leiter einzeln oder gemeinsam bedeckt, und ein Abschirmband, das in Längsrichtung gewickelt ist, um einen Umfang des Kerndrahts zu bedecken, wobei jeder der Vielzahl von abgeschirmten Kerndrähten auf derartige Weise angeordnet ist, dass ein Wickelendseitenrand, der ein Ende in einer Breitenrichtung des Abschirmbands ist und außen von dem in Längsrichtung gewickelten Abschirmband angeordnet ist, in einer radialen Richtung des Kommunikationskabels in Bezug auf eine zentrale Position des Kerndrahts außen angeordnet ist.

According to one embodiment of the invention, a communication cable comprises:

• a plurality of shielded core wires each of which includes a core wire comprising an insulating material covering a periphery of at least one conductor individually or collectively, and a shield tape wound longitudinally to cover a periphery of the core wire, each of the plurality of shielded core wires is arranged in such a manner that a winding end side edge, which is an end in a width direction of the shielding tape and is disposed outside of the longitudinally wound shielding tape, is outside in a radial direction of the communication cable with respect to a central position of the core wire is arranged.

• Ausbilden einer Gesamtheit bzw. eines Aggregats durch Verwenden einer Vielzahl von Ausformwerkzeugen durch gemeinsames Drehen der Vielzahl von abgeschirmten Kerndrähten, die von Ausformwerkzeugen geliefert sind, in einer Umfangsrichtung, wobei jedes der Ausformwerkzeuge ein Paar von Führungsnuten zum Führen von beiden Rändern in einer Breitenrichtung des Abschirmbands umfasst und konfiguriert ist, um eine Form des Abschirmbands durch Laufenlassen beider Ränder des Abschirmbands in einer Breitenrichtung durch die Führungsnuten nach und nach in eine zylindrische Form zu ändern, um dadurch den abgeschirmten Kerndraht durch Wickeln des Abschirmbands in Längsrichtung um den Kerndraht auszubilden, und
• Anordnen eines Wickelendseitenrands, der ein Ende in einer Breitenrichtung des Abschirmbands ist und außen von dem in Längsrichtung gewickelten Abschirmband angeordnet ist, in einer radialen Richtung des Kommunikationskabels in Bezug auf eine zentrale Position des Kerndrahts außen, wenn das Aggregat ausgebildet wird, durch Einstellen eines Montagewinkels von jedem der Ausformwerkzeuge.

According to a further embodiment of the invention, a method for manufacturing a communication cable comprising a plurality of shielded core wires, each of which comprises a core wire comprising an insulating material individually or collectively covering a periphery of at least one Leister, and a shielding tape, which is wound lengthways to cover a circumference of the core wire, the following:

• Forming an entity by using a plurality of forming tools by rotating together the plurality of shielded core wires supplied from forming tools in a circumferential direction, each of the forming tools having a pair of guide grooves for guiding both edges in a width direction of the shielding tape and configured to gradually change a shape of the shielding tape to a cylindrical shape by running both edges of the shielding tape in a width direction through the guide grooves to thereby form the shielded core wire by winding the shielding tape longitudinally around the core wire, and
• Arranging a winding end side edge, which is an end in a width direction of the shielding tape and is disposed outside of the longitudinally wound shielding tape, in a radial direction of the communication cable with respect to a central position of the core wire outside when the unit is formed by setting a mounting angle from each of the forming tools.

Points of the invention

According to an embodiment of the invention, a communication cable that improves transmission characteristics when transmitting a high-speed signal, and a method of manufacturing the same can be provided.

Figure list

• 1A eine Querschnittsansicht ist, die einen Querschnitt vertikal zu einer Längsrichtung eines Kommunikationskabels bei einer Ausführungsform der vorliegenden Erfindung zeigt;
• 1B eine perspektivische Ansicht ist, die einen Rand des Kommunikationskabels zeigt;
• 2 eine Querschnittsansicht ist, die ein Abschirmband zeigt;
• 3 eine erklärende graphische Darstellung ist, die eine Nebensprechrichtung in einem abgeschirmten Kerndraht zeigt;
• 4A ein schematisches Blockdiagramm ist, das eine Verdrillungsvorrichtung zum Herstellen des Kommunikationskabels zeigt;
• 4B eine schematische graphische Darstellung ist, die einen Bandwickelteil der Verdrillungsvorrichtung zum Herstellen des Kommunikationskabels zeigt;
• 4C eine perspektivische Ansicht ist, die ein Ausformwerkzeug des Bandwickelteils zum Herstellen des Kommunikationskabels zeigt;
• 5 eine Querschnittsansicht ist, die eine Anordnung des Ausformwerkzeugs zeigt;
• 6 ein Kurvendiagramm ist, das eine Nahnebensprechdämpfungscharakteristik im Kommunikationskabel bei einem Beispiel zeigt;
• 7A eines Querschnittsansicht ist, die einen Querschnitt vertikal zu einer Längsrichtung eines Kommunikationskabels bei einem Vergleichsbeispiel zeigt; und
• 7B ein Kurvendiagramm ist, das eine Nahnebensprechdämpfungscharakteristik im Kommunikationskabel des Vergleichsbeispiels zeigt.

Next, the present invention will be explained in more detail in conjunction with the accompanying drawings, in which:

• 1A Fig. 13 is a cross-sectional view showing a cross section vertical to a lengthwise direction of a communication cable in an embodiment of the present invention;
• 1B Fig. 3 is a perspective view showing an edge of the communication cable;
• 2 Fig. 3 is a cross-sectional view showing a shield tape;
• 3 Fig. 13 is an explanatory diagram showing a crosstalk direction in a shielded core wire;
• 4A Fig. 13 is a schematic block diagram showing a twisting device for making the communication cable;
• 4B Fig. 13 is a schematic diagram showing a tape winding part of the twisting device for manufacturing the communication cable;
• 4C Fig. 13 is a perspective view showing a die of the ribbon winding part for manufacturing the communication cable;
• 5 Fig. 3 is a cross-sectional view showing an arrangement of the molding tool;
• 6th Fig. 13 is a graph showing a near-end crosstalk attenuation characteristic in the communication cable in an example;
• 7A Fig. 13 is a cross-sectional view showing a cross section vertical to a lengthwise direction of a communication cable in a comparative example; and
• 7B Figure 13 is a graph showing a near-end crosstalk attenuation characteristic in the communication cable of the comparative example.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[Embodiment]

An embodiment of the invention will be described below with reference to the accompanying drawings.

1A Fig. 13 is a cross-sectional view showing a cross section vertical to a lengthwise direction of a communication cable in an embodiment of the present invention. 1B Fig. 13 is a perspective view showing an edge of the communication cable.

Like it in the 1A and 1B shown includes a communication cable 1 one or more conductors 21st , a variety of core wires 2 that have an insulating material 22nd include that of a perimeter of the ladder 21st Covered individually or together, a shielding tape 3 running lengthways on a circumference of the core wires 2 is wound, a metallic shielding layer 6th that represent a scope of a whole or an aggregate 5 covered by twisting a plurality of shielded core wires 4th is formed, each of which with the shielding tape 3 covered core wires 2 contains, and a sheath 7th covering a perimeter of the metallic shielding layer 6th covered.

For example the communication cable 1 Used as a LAN cable for rail vehicles or as a LAN cable for sending and receiving large (volumes of) data in a data center, etc.

In the present embodiment, the core wire comprises 2 a twisted pair of wires that is a pair of insulated wires 23 which are twisted together, each of which is made of an insulating material 22nd consists of one or more conductors 21st covered (a twisted conductor made up of a multitude of individual metallic wires 21a that are twisted together). However, the structure of the core wire is 2 not limited to and the core wire 2 can for example be an integral coating structure with two cores, in which the insulating material 22nd a pair of ladders 21st integrally covered, which are arranged in parallel, or they can only be a single insulated wire 23 include.

The head 21st consists of a twisted conductor made up of a large number of individual metallic wires 21a that is made with each other are twisted. The metallic single wire 21a may be made of soft copper wire made of pure copper or a metallic clad single wire formed by plating metal such as tin or silver on the soft copper wire made of pure copper. In addition, the present invention is not limited to this and the conductor 21st can consist of a single conductor.

The insulating material 22nd includes a foaming layer 221 which is made of a foaming resin that covers the perimeter of the conductor 21st covered, and a non-foaming layer 222 made from a non-foaming resin 222 consists of the extent of the foaming layer 221 covered. As the foaming resin that is the foaming layer 221 For example, foaming polyethylene can be used. As the non-foaming resin that is the non-foaming layer 222 For example, non-foaming polyethylene can be used. However, the invention is not limited to this and the insulating material 22nd may be made of a material having a relative dielectric constant of not more than 2.5, such as fluororesin such as tetrafluoroethylene-hexafluoropropylene copolymer (FEP).

Like it in 2 shown comprises the shielding tape 3 a resin layer 31 and one on a side surface of the resin layer 31 formed metal layer 32 . In the present embodiment, the resin layer is 31 made of polyester such as polyethylene terephthalate (PET). The metal layer 32 is made of light weight and low cost aluminum. The shielding tape 3 is wound lengthways around each circumference of the plurality of core wires 2 individually to cover while the metal layer 32 is arranged outside. The detail of a step for winding the shielding tape 3 will be explained below.

The shielded core wire 4th contains the shielding tape 3 that runs lengthways around the circumference of the core wires 2 is wrapped. In this case, although the example will be explained, which is four shielded core wires 4th used the number of shielded core wires 4th not limited to that. In the present embodiment, although the four core wires are 2 , ie the four twisted wire pairs are used, the lay lengths of the four twisted wire pairs are preferably different from one another. According to this structure, the crosstalk attenuation can be suppressed.

One aggregate 5 is by twisting the four shielded core wires 4th formed with each other. The aggregate 5 is twisted with a relatively long lay length and the lay length of the aggregate 5 is, for example, not less than 70 mm and not more than 140 mm. By adjusting the lay length of the unit in this way 5 that it is not more than 70 mm, an electrical length of the communication cable can be 1 can be shortened, and a propagation delay can be reduced. In addition, it is possible to press in the core wire 2 and crushing the foaming layer 221 to thereby suppress the deterioration in the transmission characteristics. Furthermore, in the present embodiment, the detail of which will be explained below, there can be respective shielded core wires 4th according to the twist of the aggregate 5 are twisted when the lay length of the aggregate 5 In short, transmission characteristics are deteriorated by the cause that, for example, wrinkling of the shielding tape 3 he follows. Meanwhile, by adjusting the lay length of the unit in this way 5 that it is not less than 70 mm, the wrinkling of the shielding tape 3 can be suppressed so that the deterioration in transmission characteristics can be suppressed. In addition, it is by adjusting the lay length of the unit in this way 5 that it is not more than 140 mm, a concentration of a load on a shielded core wire is possible 4th when bending the communication cable 1 to suppress a deterioration in transmission characteristics or a reduction in a life of the communication cable 1 to suppress. It is also possible to determine the direction of a respective shielded core wire 4th and the relative position of the respective shielded core wires 5 easy to maintain so that it is possible to change the positions between winding end side edges 3a maintain what is explained below.

As described above, it is by thus adjusting the lay length of the unit 5 that it is not less than 70mm and not more than 140mm, possible one from the shielded core wire 4th suppressing applied stress, thereby crushing the foaming layer 221 and the indentation on the shielding tape 3 so that it is possible to suppress the deterioration in the transfer characteristics and the direction and position of the winding end side edges 3a (which will be explained later) of the shielding tape 3 of the shielded core wire 4th to maintain. Furthermore, the lay length of the twisted pair of wires is used as the core wire 2 is used, for example, not less than four times the lay length of the twisted wire pair serving as the core wire 2 is used.

The metallic shielding layer 6th is designed around the perimeter of the unit 5 to cover. The metallic shielding layer 6th and the Metal layer 32 of the shielding tape 3 in each shielded core wire 4th are configured to contact and be electrically connected to each other in such a manner that the metallic shield layer 6th potentially equal to the metal layer 32 is.

In the present embodiment, there is the metallic shield layer 6th from an intertwined shielding that contains individual metallic wires that are intertwined. Compared with, for example, a horizontal shielding that contains individual metallic wires that are wound in a spiral shape, etc., the metallic shielding layer is tensioned 6th an element (in this case the aggregate) less strong, which is in a radial direction with respect to the metallic shielding layer 6th is arranged inside. In the present embodiment, the metallic shield layer is 6th by appropriately setting an inner diameter of the metallic shield layer 6th configured to the aggregate 5 not too tight. According to this structure, it is even if the insulating material 22nd the foaming layer 221 comprises, possible, crushing the foaming layer 221 and suppress the deterioration in the transmission characteristics. In addition, there is the shielded core wire 4th in the metallic shielding layer 6th Can move relatively freely, the communication cable 1 easily bent. Furthermore, there is a space, that is, an air layer with a relatively low dielectric constant, between the respective shielded core wires 4th is held, possible to further suppress the damping. Meanwhile, although it is in 1A not shown, a cross-sectional shape of the shield tape 3 in practice not a circular shape as the shielding tape 3 into the space between the shielded core wires 4th entry.

In the present embodiment, the sheath is 7th made of polyolefin. In addition, the sheathing 7th made of polyvinyl chloride (PVC) or fluororesin. When flame retardancy is necessary, it is effective to use a material made of ethylene-vinyl acetate (EVA) copolymer. It can also be used as flame retardant for the cladding 7th Metal hydroxide such as aluminum hydroxide, magnesium hydroxide and the like of not less than 100 parts and not more than 250 parts by mass can be added to 100 parts by mass of the base polymer. Furthermore, acid-modified polyolefin, etc. can be used as the material of the jacket 7th to be added. It is preferable to use the sheathing 7th by pipe extrusion to form the unit 5 not too tight. For example, is an outer diameter of the jacket 7th , that is, an outer diameter of the communication cable 1 , e.g. 8.8 mm.

(Detail of the step for winding the shielding tape 3 Etc.)

As a result of diligent study by the inventors, it is found that if the resin layer 31 spirally around the core wire 2 is wound (twisted pair of wires), the crosstalk during high-speed signal transmission from the resin layer 31 occurs in all circumferential directions because the shielding tape 3 is periodically arranged in a longitudinal direction of the cable. On the other hand, it is found that if the shielding tape 3 is wound in the longitudinal direction, as in the present embodiment, the crosstalk from the edge of one end in the width direction of the shielding tape 3 and is arranged on an outer side of the winding in the longitudinal direction (hereinafter referred to as “the winding end side edge 3a”), as shown in FIG 3 is shown while high speed signal transmission occurs. It is therefore possible to reduce the crosstalk attenuation by sufficiently separating both winding end side edges 3a of the shielding tape 3 in each shielded core wire 4th to suppress.

Thus, in the present embodiment, the plurality of shielded core wires are 4th each arranged so that the winding end side edge 3a of the shielding tape 3 in a radial direction with respect to a central position (central axis) of the core wires 2 is arranged outside. That means that as it is in 1A shown are the respective shielded core wires 4th are arranged so that the winding end side edges 3a are located outside with respect to a circle A, passing through the central position of the four core wires 2 runs. This is in comparison with the case in which the respective winding end side edges 3a in the radial direction with respect to the central positions of the core wires 2 (the circle A) in the respective shielded core wires 4th are arranged inside, the respective winding end side edges 3a , which are positions at which crosstalk occurs, are separated from each other, so that it is possible to suppress the crosstalk attenuation, thereby improving the transmission characteristics. Meanwhile, the position of each core wire 2 in actual manufacture of the communication cable 1 be offset. In such a case, there is a central position (a cable center) of the communication cable 1 defined as the center in the cross-sectional view vertical to the longitudinal direction, and the winding end side edge 3a is in terms of a complete circle passing through the central position of the core wire 2 that runs to the center of the cable under the four core wires 2 is closest, preferably arranged outside.

To further suppress the crosstalk attenuation, it is more preferable to use the Wrap end margin 3a to be arranged further out in the radial direction. It is also desirable to have any shielded core wire 4th to be arranged in such a way that the winding end side edge 3a in the radial direction with respect to the core wire 2 is arranged outside. That means the shielding tape 3 for each shielded core wire 4th is wound in such a way that the winding end side edge 3a in the radial direction with respect to the core wire 2 is arranged outside (ie in the radial direction of the communication cable 1 Outside). In the present embodiment, each is a shielded core wire 4th arranged in such a way that the winding end side edges 3a the respective shielding tapes 3 are arranged outside in the radial direction with respect to the circle B, which the four core wires 2 surrounds. Meanwhile, the position of each core wire 2 in actual manufacture of the communication cable 1 be offset. In such a case there is a central position of the communication cable 1 (the cable center) defined as the center in the cross-sectional view vertical to the longitudinal direction, and the winding end side edge 3a is in terms of a complete circle passing through the central position of the core wire 2 that runs to the center of the cable under the four core wires 2 is closest, preferably arranged outside.

The wrap end margins 3a the shielding tapes 3 in the respective shielded core wires 4th are preferably separated from each other by not less than 2.5 mm. When there is a gap between the winding end side edges 3a the shielding tapes 3 in the respective shielded core wires 4th (a linear distance in the cross-sectional view vertical to the longitudinal direction) is less than 2.5 mm, the crosstalk attenuation may increase, so that the transmission characteristics may deteriorate.

In the present embodiment, each of the plurality of shielded core wires is 4th arranged in such a way that the winding end side edge 3a of the shielding tape 3 is directed to a space C (directed towards it) between the shielded core wires 4th which are adjacent to each other in a circumferential direction, and the metallic shield layer 6th is trained. The communication cable 1 contains four spaces C as the four shielded core wires 4th are arranged in the circumferential direction. The wrap end margins 3a the shielding tapes of the shielded core wires 4th are each directed to the different rooms C.

Meanwhile, the present invention is not limited to this and the wrap end side edge 3a of the shielding tape 3 on each shielded core wire 4th can to the metallic shielding layer 6th be directed. Furthermore, in terms of deteriorating the crosstalk attenuation, it is preferable that the wrap end side edge 3a of the shielding tape in each shielded core wire 4th not to the wrap end side edge 3a of the shielding tape 3 in the other shielded core wire 4th is directed (ie the winding end side edge 3a is not towards the wrap end margin 3a of the shielding tape 3 in the other shielded core wire 4th aligned). In addition, in the present embodiment, the wrap end side edge is 3a of the shielding tape 3 in each shielded core wire 4th towards the metallic shielding layer 6th aligned between the adjacent shielded core wires 4th is arranged.

The wrap end margins 3a the shielding tapes 3 at the respective shielded core wires 4th are preferably separated from one another as much as possible, and preferably with a substantially same interval in the circumferential direction. In other words, the winding end side edges are 3a the shielding tapes 3 at the respective shielded core wires 4th preferably arranged at positions in a rotational symmetry of essentially 90 ° with respect to the cable center.

The respective shielded core wires 4th are with the twisting of the aggregate 5 twisted. The relative positions between the wrap end side edges 3a the shielding tapes 3 in the respective core wires are approximately constant regardless of the position in the longitudinal direction. Thus if you are the aggregate 5 looks at which the sheath 7th and the metallic shield layer 6th are removed, the winding end side edges 3a at the four shielded core wires 4th each exposed to the outside. That means that each shielded core wire 4th is located at the position at which the winding end side edge 3a can be viewed from the outside.

In addition, the laying directions of the shielding tapes 3 the multitude of shielded core wires 4th prefer the same direction. As the crosstalk from the wrap end side edge 3a into the core wire 2 emerges when the shielded core wire 4th , of which the laying direction of the shielding tape 3 an opposite direction to the other directions of installation of the shielding tape 3 are the winding end margins 3a the shielding tapes 3 at the shielded core wires 4th that are adjacent to each other in the circumferential direction face each other in the circumferential direction, so that the crosstalk attenuation can increase. Here means the laying direction of the shielding tape 3 a direction of rotation of the shielding tape 3 along the perimeter of the core wire 2 from an opposite side edge to the wrap end side edge 3a to the wrap end side edge 3a in the width direction of the shielding tape 3 if it is from one side edge of the shielded core wire 4th is viewed from.

The shielding tape 3 is longitudinally around the circumference of the core wire 2 for not less than 1.3 times to 1.5 times the circumference of the core wire 2 wrapped. When winding the shielding tape 3 around the perimeter of the core wire 2 is less than 1.3 times, an overlapped length is too short and crosstalk may increase due to opening of an overlapped part which is caused by accident for some reason. Meanwhile, if the shielding tape 3 lengthways around the core wire 2 for more than 1.5 times, the manufacture thereof will become difficult, the manufacturing cost will increase and the weight of the communication cable will increase 1 increase. In addition, the overlapped length is approximately 23% of the width of the shielding tape 3 when winding the shielding tape 3 around the perimeter of the core wire 2 at a 1.3 fold. The overlapped length is about 33% of the width of the shielding tape at 1.5 times 3 when winding the shielding tape 3 around the perimeter of the core wire 2 . Therefore, the overlapped length of the shielding tape is preferably not less than 23% and not more than 33% of the width of the shielding tape 3 . Furthermore, in the present embodiment, the respective shielded core wires are 4th arranged in such a way that the overlapped part where the shielding tape 3 is overlapped (the part where the shielding tape 3 is arranged twice), to the metallic shielding layer 6th is directed in the radial direction (opposite to it). That means the overlapped part of the shielding tape 3 at the shielded core wire 4th towards the metallic layer 6th is arranged and not in the direction of the cable center of the communication cable 1 .

In addition, is a thickness of the metal layer 32 of the shielding tape 3 preferably not less than 30 µm. When the thickness of the metal layer 32 is less than 30 µm, the metal layer 32 are broken at the time of manufacture. Furthermore, it may be impossible to find any shape of the shielding tape 3 when wrapping around the core wire 2 to hold (the winding end side margin 3a may open after swaddling). In the present embodiment, the thickness of the metal layer is 32 is set to 38 µm and is the thickness of the resin layer 31 set to 12 µm.

(Procedure for making the communication cable 1 )

For making the communication cable 1 first becomes the girth of the head 21st together with the foaming layer 221 and the non-foaming layer 222 at the same time covered to the insulated wire 23 to provide. Next is the whole or the aggregate 5 by using an in 4A shown twisting device 40 educated. Specifically by inserting a pair of drums 41 on which the insulated wires 23 with a transmitter part 42 are wound, and sending the insulated wires respectively 23 of the two drums 41 while rotating the pair of drums 41 to get the core wire 2 train, which consists of a twisted pair of wires. Here are four broadcast parts 42 in the twisting device 40 intended. The one from the four broadcast parts 42 sent four core wires 2 are in a tape winding part 43 introduced.

Like it in 4B is shown at the tape winding part 43 the shielding tape sent from a coil 3 to a forming tool 44 along with the core wires sent by the transmitter parts 2 sent while through a variety of reels 43b a tensile force on the shielding tape 3 is exercised. Additionally, though 4B only a single path for a coil 43a and a shielding tape 3 as a representative shows in practice the four coils 43a corresponding to the four core wires 2 intended. The shielding tapes 3 become the corresponding forming tools 44 from the respective coils 43a through the multitude of rollers 43b Posted.

Like it in 4C shown comprises the forming tool 44 a cylindrical main body part 441 and a tape guide 442 that is on an entry side of the main body part 441 (one lead-in side of the shielding tape 3 and the core wires 2 ) is provided. The tape guide 442 includes a pair of guide grooves 442a around both edges in the width direction of the shielding tape 3 respectively. The tape guide 442 is configured to be a shape of the shielding tape 3 gradually changed to a cylindrical shape by running both edges in the width direction of the shielding tape 3 through the guide grooves 442a , and around the shielding tape 3 lengthways around the circumference of the core wires 2 to wrap. By suitably setting a mounting angle for the tape guide 442 becomes an entrance angle of the shielding tape 3 to the main body part 441 held constant at a desired angle so that the position of the wrap end side edge 3a of the shielding tape 3 can be adjusted to a desired position. Here the assembly angle of the tape guide means 442 a mounting bracket of the main body part 441 in the circumferential direction.

More specific, as in 5 shown is the tape guides 442 of the respective forming tools 44 arranged at the positions in a rotational symmetry of about 90 ° to the cable center. Additionally shows 5 any forming tool 44 by a cross section along the line CC in 4C . In the present embodiment, the core wire 2 into the forming tool 44 introduced while the core wire 2 to a central part in the width direction of the shield tape 3 is directed. Furthermore, in the present embodiment, there is the winding end side edge 3a at an opposite side to the position of the inserted shielding tape 3 over the core wire 2 is arranged, the mounting bracket of the band element 442 adjusted in such a way that the shielding tape 3 is located inside and the core wire 2 is arranged outside. The respective forming tools 44 are closely arranged and fixed by fixing rings (not shown) in the state in which the mounting angle of the tape guide 442 is set appropriately.

The ones from the respective forming tools 44 supplied four shielded core wires 4th are in a cylindrical assembly guide 46 introduced and bundled (collected) and to the winding part 45 Posted. They become more detailed through the assembly guide 46 carried out four shielded core wires 4th rotated in the circumferential direction and through the winding part 45 twisted to the aggregate 5 train, and then the aggregate 5 to the winding part 45 Posted. Meanwhile, it will when the four shielded core wires 4th without using the assembly guide 46 be twisted, the position of the winding end side edge becomes difficult 3a of the shielding tape 3 on each shielded core wire 4th to control. Thus, in the present embodiment, the aggregate 5 by twisting the four shielded core wires 4th formed after they are bundled by using the assembling guide 46 . Additionally has the assembly lead 46 a function of preventing transmission of a through the winding part 45 caused rotating effect on the forming tool 44 .

If you turn back to the 4A to, includes the winding part 45 a drum 45a to the aggregate 5 to wind, and a rolling mechanism 45b to get the four shielded core wires 4th through the drum 45a to wind while rotating the four shielded core wires together 4th in the circumferential direction. The through the assembly lead 46 of the tape winding part 43 bundled four shielded core wires 4th are made by the rolling mechanism 45b rotated in the circumferential direction (twisted) around the unit 5 to train. As described above, as the assembly guide 46 used the four shielded core wires 4th while maintaining the relative positions between the wrap end side edges 3a the shielding tapes 3 at the respective shielded core wires 4th twisted. That through the rolling mechanism 45b trained aggregate 5 is through the drum 45a by the rotation of the rolling mechanism 45b wrapped.

Then the metallic shielding layer consisting of the braided shielding is made 6th around the circumference of the drum 45a wound aggregate 5 educated. Then the sheathing 7th by pipe extrusion around the circumference of the metallic shielding layer 6th trained to use the communication cable 1 to provide.

(Crosstalk attenuation characteristic of the communication cable 1 )

As an example, a near-end crosstalk attenuation characteristic of the communication cable was used 1 calculated by simulation in the present embodiment. 6th shows the near-end crosstalk attenuation characteristic obtained. 6th also shows a default value that is for the LAN cable category 7th is required. Like it in 6th shown has the communication cable 1 in the example, a near-end crosstalk attenuation with a probability to the standard for the high-speed signal of 100 MHz or above and the good crosstalk attenuation characteristic was obtained.

For comparison with the present embodiment, a near-end crosstalk attenuation characteristic of a communication cable was used 60 at an in 7A Comparative example shown calculated by simulation. The communication cable 60 in the comparative example has a structure similar to that of the communication cable 1 in the example, except that the winding end side edges 3a the shielding tapes 3 at the respective shielded core wires 4th on a cable center side (in the radial direction of the communication cable 60 in relation to the central position of the core wire 2 inside) are arranged. 7B shows the near-end crosstalk attenuation characteristic obtained.

How to do it by comparing 6th With 7B clearly understood is with the communication cable 60 in the comparative example, the near-end crosstalk attenuation for the high-speed signal of 100 MHz or more as compared with that of the communication cable 1 increased in the example. Thus, although the communication cable 60 meets the standard value, the probability with the standard value is smaller.

(Function and effect of the embodiment)

As it is explained above is for the communication cable 1 according to the present embodiment, the plurality of shielded core wires 4th each arranged in such a way that the wrap end margin 3a , the one end in the width direction of the shield tape wound in the longitudinal direction 3 and outside of the longitudinally wound shielding tape 3 is arranged in the radial direction of the communication cable 1 in relation to the central position of the core wire 2 arranged outside.

According to this structure, the distance between the winding end side edges can be 3a the shielding tapes 3 in the respective shielded core wires 4th compared to the distance between the winding end side edges 3 the shielding tapes 3 that is in the radial direction of the communication cable 1 in relation to the central positions of the core wires 2 arranged inside can be surely increased, so that the transmission characteristics such as crosstalk attenuation in the transmission of the high-speed signal of 100 MHz or more can be improved. As a result, the communication cable can 1 meet the characteristics required of the LAN cable that is one category above the category 7th (e.g. category 7a , Category 8th ) Has.

(Summary of Embodiment)

• [1] Kommunikationskabel (1), das folgendes umfasst: eine Vielzahl von abgeschirmten Kerndrähten (4), von welchen jeder einen Kerndraht (2) umfasst, der einen Isolierstoff (22) umfasst, der einen Umfang von wenigstens einem Leiter (21) einzeln oder gemeinsam bedeckt, und ein Abschirmband (3), das in Längsrichtung gewickelt ist, um einen Umfang des Kerndrahts (2) zu bedecken, wobei jeder der Vielzahl von abgeschirmten Kerndrähten (4) auf derartige Weise angeordnet ist, dass ein Wickelendseitenrand (3a), der ein Ende in einer Breitenrichtung des Abschirmbands (3) ist und außen von dem in Längsrichtung gewickelten Abschirmband (3) angeordnet ist, in einer radialen Richtung des Kommunikationskabels (1) in Bezug auf eine zentrale Position des Kerndrahts (2) außen angeordnet ist.
• [2] Kommunikationskabel (1) nach [1], wobei die Wickelendseitenränder (3a) der Abschirmbänder (3) der Vielzahl von abgeschirmten Kerndrähte (4) um nicht weniger als 2,5 mm voneinander getrennt sind.
• [3] Kommunikationskabel (1) nach [1] oder [2], wobei die Abschirmbänder (3) der Vielzahl von abgeschirmten Kerndrähten (4) jeweils in einer selben Richtung verlegt sind.
• [4] Kommunikationskabel (1) nach einem von [1] bis [3], wobei die Vielzahl von abgeschirmten Kerndrähten (4) jeweils auf derartige Weise angeordnet ist, dass der Wickelendseitenrand (3a) der Abschirmbänder (3) an einer weiter äußeren Seite in einer radialen Richtung als der Kerndraht (2) angeordnet ist.
• [5] Kommunikationskabel (1) nach einem von [1] bis [4], das weiterhin folgendes umfasst: eine metallische Abschirmschicht (6), die einen Umfang der Vielzahl von abgeschirmten Kerndrähten (4) gemeinsam bedeckt, wobei jeder der Vielzahl von abgeschirmten Kerndrähten (4) auf derartige Weise angeordnet ist, dass der Wickelendseitenrand (3a) des Abschirmbands (3) zu einem Raum (C) zwischen der Vielzahl von abgeschirmten Kerndrähten (4), die in einer Umfangsrichtung benachbart zueinander sind, und der metallischen Abschirmschicht (6) ausgerichtet ist.
• [6] Kommunikationskabel (1) nach einem von [1] bis [5], wobei eine Schlaglänge einer Gesamtheit bzw. eines Aggregats (5) einschließlich der Vielzahl von abgeschirmten Kerndrähten (4), die miteinander verdrillt sind, nicht weniger als 70 mm und nicht mehr als 140 mm ist.
• [7] Kommunikationskabel (1) nach einem von [1] bis [6], wobei das Abschirmband (3) eine Harzschicht (31) und eine auf einer Seitenoberfläche der Harzschicht (31) ausgebildete Metallschicht (32) umfasst, wobei die Metallschicht (32) des Abschirmbands (3) aus Aluminium besteht und wobei eine Dicke der Metallschicht (32) nicht weniger als 30 µm ist.
• [8] Kommunikationskabel (1) nach einem von [1] bis [7], das folgendes umfasst: eine metallische Abschirmschicht (6), die einen Umfang der Vielzahl von abgeschirmten Kerndrähten (4) gemeinsam bedeckt, wobei die metallische Abschirmschicht (6) eine verflochtene Abschirmung umfasst, die verflochtene metallische Einzeldrähte enthält, und wobei der Isolierstoff (22) des Kerndrahts (2) eine schäumende Schicht (221) umfasst, die aus einem schäumenden Harz besteht.
• [9] Verfahren zum Herstellen eines Kommunikationskabels (1), das eine Vielzahl von abgeschirmten Kerndrähten (4) umfasst, von welchen jeder einen Kerndraht (2) umfasst, der einen Isolierstoff (22) umfasst, der einen Umfang von wenigstens einem Leiter (21) einzeln oder gemeinsam bedeckt, und ein Abschirmband (3), das in Längsrichtung gewickelt ist, um einen Umfang des Kerndrahts (2) zu bedecken, wobei das Verfahren folgendes umfasst:
  • Ausbilden einer Gesamtheit bzw. eines Aggregats (5) durch Verwenden einer Vielzahl von Ausformwerkzeugen (44) durch gemeinsames Drehen der Vielzahl von abgeschirmten Kerndrähten (4), die von Ausformwerkzeugen (44) geliefert sind, in einer Umfangsrichtung, wobei jedes der Ausformwerkzeuge (44) ein Paar von Führungsnuten (442a) zum Führen von beiden Rändern in einer Breitenrichtung des Abschirmbands (3) umfasst und konfiguriert ist, um eine Form des Abschirmbands (3) durch Laufenlassen von den beiden Rändern des Abschirmbands (3) in der Breitenrichtung durch die Führungsnuten (442a) nach und nach in eine zylindrische Form zu ändern, um dadurch den abgeschirmten Kerndraht (4) durch Wickeln des Abschirmbands (3) in Längsrichtung um den Kerndraht (2) auszubilden, und
  • Anordnen eines Wickelendseitenrands (3a), der ein Ende in einer Breitenrichtung des Abschirmbands (3) ist und außen an dem in Längsrichtung gewickelten Abschirmband (3) angeordnet ist, in einer radialen Richtung des Kommunikationskabels (1) in Bezug auf eine zentrale Position des Kerndrahts (2) nach außen, wenn das Aggregat (5) ausgebildet wird, durch Einstellen eines Montagewinkels von jedem der Ausformwerkzeuge (44).
• [10] Verfahren nach [9], das weiterhin folgendes umfasst:
  • Einführen und Bündeln der Vielzahl von abgeschirmten Kerndrähten (4), die von den Ausformwerkzeugen (44) geliefert sind, in eine Zusammenbauführung (46),
  • wobei das Aggregat (5) durch gemeinsames Drehen der Vielzahl von abgeschirmten Kerndrähten (4), die in der Zusammenbauführung (46) gebündelt sind, in der Umfangsrichtung ausgebildet wird.

Next, technical ideas understood from the embodiment will be described below with reference numerals, etc. used for the embodiments. However, each reference numeral etc. is not intended to limit the constituent elements in the claims to the elements etc. described in the embodiment.

• [1] Communication cable ( 1 ), which includes: a plurality of shielded core wires ( 4th ), each of which has a core wire ( 2 ) includes an insulating material ( 22nd ) comprises a circumference of at least one conductor ( 21st ) individually or collectively covered, and a shielding tape ( 3 ), this in Is wound lengthways around a circumference of the core wire ( 2 ), each of the plurality of shielded core wires ( 4th ) is arranged in such a way that a winding end side edge ( 3a) having one end in a width direction of the shield tape ( 3 ) and on the outside of the shielding tape wound lengthways ( 3 ) is arranged in a radial direction of the communication cable ( 1 ) with respect to a central position of the core wire ( 2 ) is arranged on the outside.
• [2] Communication cable ( 1 ) according to [1], whereby the winding end side edges ( 3a) the shielding tapes ( 3 ) the multitude of shielded core wires ( 4th ) are separated from each other by no less than 2.5 mm.
• [3] Communication cable ( 1 ) according to [1] or [2], whereby the shielding tapes ( 3 ) the multitude of shielded core wires ( 4th ) are each laid in the same direction.
• [4] Communication cable ( 1 ) according to one of [1] to [3], wherein the plurality of shielded core wires ( 4th ) is arranged in such a way that the winding end side edge ( 3a) the shielding tapes ( 3 ) on a further outer side in a radial direction than the core wire ( 2 ) is arranged.
• [5] Communication cable ( 1 ) according to any one of [1] to [4], which further comprises: a metallic shielding layer ( 6th ) covering a circumference of the plurality of shielded core wires ( 4th ) covered together, each of the plurality of shielded core wires ( 4th ) is arranged in such a way that the winding end side edge ( 3a) of the shielding tape ( 3 ) to a space (C) between the plurality of shielded core wires ( 4th ), which are adjacent to each other in a circumferential direction, and the metallic shield layer ( 6th ) is aligned.
• [6] Communication cable ( 1 ) according to one of [1] to [5], where a lay length of an assembly or an assembly ( 5 ) including the multitude of shielded core wires ( 4th ) that are twisted together is not less than 70 mm and not more than 140 mm.
• [7] Communication cable ( 1 ) according to one of [1] to [6], the shielding tape ( 3 ) a resin layer ( 31 ) and one on a side surface of the resin layer ( 31 ) formed metal layer ( 32 ), the metal layer ( 32 ) of the shielding tape ( 3 ) consists of aluminum and a thickness of the metal layer ( 32 ) is not less than 30 µm.
• [8] Communication cable ( 1 ) according to any one of [1] to [7], comprising: a metallic shielding layer ( 6th ) covering a circumference of the plurality of shielded core wires ( 4th ) covered together, the metallic shielding layer ( 6th ) comprises a braided shield, which contains braided metallic strands, and the insulating material ( 22nd ) of the core wire ( 2 ) a foaming layer ( 221 ), which consists of a foaming resin.
• [9] Method of making a communication cable ( 1 ), which has a variety of shielded core wires ( 4th ), each of which includes a core wire ( 2 ) includes an insulating material ( 22nd ) comprises a circumference of at least one conductor ( 21st ) individually or collectively covered, and a shielding tape ( 3 ) wound lengthways around a circumference of the core wire ( 2 ), the method comprising:
  • Formation of a whole or an aggregate ( 5 ) by using a variety of forming tools ( 44 ) by rotating together the multitude of shielded core wires ( 4th ) used by forming tools ( 44 ) are supplied in a circumferential direction, each of the forming tools ( 44 ) a pair of guide grooves ( 442a) for guiding both edges in a width direction of the shielding tape ( 3 ) and is configured to have a shape of the shielding tape ( 3 ) by running the two edges of the shielding tape ( 3 ) in the width direction through the guide grooves ( 442a) gradually change to a cylindrical shape, thereby making the shielded core wire ( 4th ) by winding the shielding tape ( 3 ) lengthways around the core wire ( 2 ) to train, and
  • Arranging a wrap end side edge ( 3a) having one end in a width direction of the shield tape ( 3 ) and outside of the shielding tape wound lengthways ( 3 ) is arranged in a radial direction of the communication cable ( 1 ) with respect to a central position of the core wire ( 2 ) to the outside when the unit ( 5 ) is formed by setting a mounting angle of each of the forming tools ( 44 ).
• [10] The method according to [9], which further comprises the following:
  • Inserting and bundling the multitude of shielded core wires ( 4th ) generated by the forming tools ( 44 ) are delivered in an assembly guide ( 46 ),
  • where the aggregate ( 5 ) by rotating together the multitude of shielded core wires ( 4th ) that are in the assembly guide ( 46 ) are bundled is formed in the circumferential direction.

Although the embodiment of the invention has been described, the invention is not to be limited to the embodiment according to the claims. Furthermore, please note that not all combinations of the features described in the embodiment are necessary to solve the problem of the invention.

The invention can be modified and implemented as appropriate without departing from its spirit. For example, in the above embodiment, it is not explained that for the shielded core wire 4th the shielding tape 3 can be wound in several layers (multi-layer structure) in the longitudinal direction. For example, if two layers of shielding tape 3 are wound, the crosstalk attenuation can be further suppressed by adjusting a laying direction of a first layer of the shielding tape to the opposite direction of a laying direction of the second layer of the shielding tape. In such a case, the wrap end side edge should 3a from a shielding tape that is wound furthest outward 3 in the radial direction of the communication cable 1 in relation to the central position of the core wire 2 be arranged outside.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2019108968 [0001]
• US 2015/0096783 A1 [0005, 0006]

Claims (10)

Communication cable (1) comprising: a plurality of shielded core wires (4), each of which comprises a core wire (2) comprising an insulating material (22) covering a periphery of at least one conductor (21) individually or collectively, and a shielding tape (3) which is wound lengthways to cover a periphery of the core wire (2), wherein each of the plurality of shielded core wires (4) is arranged in such a manner that a winding end side edge (3a) which is one end in a width direction of the shielding tape (3) and is disposed outside of the longitudinally wound shielding tape (3) is in a radial direction of the communication cable (1) with respect to a central position of the core wire (2) is arranged outside. Communication cable (1) Claim 1 wherein the winding end side edges (3a) of the shield tapes (3) of the plurality of shielded core wires (4) are separated from each other by not less than 2.5 mm. Communication cable (1) Claim 1 or 2 wherein the shielding tapes (3) of the plurality of shielded core wires (4) are each laid in a same direction. Communication cable (1) to one of the Claims 1 to 3 wherein the plurality of shielded core wires (4) are each arranged in such a manner that the winding end side edge (3a) of the shielding tapes (3) is arranged on a further outer side in a radial direction than the core wire (2). Communication cable (1) to one of the Claims 1 to 4th , further comprising: a metallic shield layer (6) covering a periphery of the plurality of shielded core wires (4) in common, each of the plurality of shielded core wires (4) being arranged in such a manner that the winding end side edge (3a) of the Shielding tape (3) is aligned with a space (C) between the plurality of shielded core wires (4), which are adjacent to each other in a circumferential direction, and the metallic shielding layer (6). Communication cable (1) to one of the Claims 1 to 5 wherein a lay length of an assembly (5) including the plurality of shield core wires (4) twisted together is not less than 70 mm and not more than 140 mm. Communication cable (1) to one of the Claims 1 to 6th wherein the shielding tape (3) comprises a resin layer (31) and a metal layer (32) formed on a side surface of the resin layer (31), wherein the metal layer (32) of the shielding tape (3) is made of aluminum and wherein a thickness of the metal layer ( 32) is not less than 30 µm. Communication cable (1) to one of the Claims 1 to 7th comprising: a metallic shield layer (6) covering a periphery of the plurality of shielded core wires (4) collectively, the metallic shield layer (6) comprising an interwoven shield containing intertwined metallic strands, and wherein the insulating material (22 ) of the core wire (2) comprises a foaming layer (221) made of a foaming resin. A method of manufacturing a communication cable (1) comprising a plurality of shielded core wires (4) each of which comprises a core wire (2) comprising an insulating material (22) covering a periphery of at least one conductor (21) individually or covered together, and a shield tape (3) wound lengthways to cover a periphery of the core wire (2), the method comprising: Forming an assembly (5) by using a plurality of forming tools (44) by rotating together the plurality of shielded core wires (4), which are supplied from forming tools (44), in a circumferential direction, each of the forming tools (44 ) comprises a pair of guide grooves (442a) for guiding both edges in a width direction of the shielding tape (3) and configured to shape a shape of the shielding tape (3) by running both edges of the shielding tape (3) in the width direction through the Gradually changing guide grooves (442a) into a cylindrical shape to thereby form the shielded core wire (4) by winding the shielding tape (3) longitudinally around the core wire (2), and Arranging a winding end side edge (3a) which is one end in a width direction of the shielding tape (3) and is disposed outside of the longitudinally wound shielding tape (3) in a radial direction of the communication cable (1) with respect to a central position of the core wire (2) outward when the unit (5) is formed by adjusting a mounting angle of each of the forming tools (44). Procedure according to Claim 9 , which further includes: Introducing and bundling the plurality of shielded core wires (4) supplied by the forming tools (44) into an assembly guide (46), whereby the assembly (5) is formed by rotating together the plurality of shielded core wires (4) which are in the Assembling guide (46) are bundled is formed in the circumferential direction.

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