JP6063417B2 - Fiber optic cable - Google Patents

Description

  The present invention relates to an optical fiber cable wired on a wall surface of a house, for example.

  In recent years, with the development of FTTH (Fiber To The Home), optical fiber cables are frequently wired to users' homes and the like. In the user's house, for example, a small-diameter low-friction indoor cable as disclosed in Non-Patent Document 1 is used. This optical fiber cable is difficult to wire directly on a wall surface such as an indoor wall or a passage. For this reason, as shown in Non-Patent Document 1, it is installed in a conduit or installed in a wire protection cover.

  Moreover, the optical fiber cable currently disclosed by patent document 1 is known as an optical fiber cable wired in gaps, such as a door in a house. This optical fiber cable is formed in a flat shape, and can be fixed to a door frame or the like using an adhesive tape.

Japanese Patent No. 5380515

Proceedings of the 2009 IEICE General Conference B-10-20

  The small-diameter low-friction indoor cable as disclosed in Non-Patent Document 1 is difficult to wire directly on the wall surface of a room or a passage, so that the optical fiber cable is used as described above. In addition to the above, a conduit or a protective cover is required. This increases the cost and makes the wiring state easily bulky. Moreover, since it is necessary to install a conduit tube or a wire protection cover separately, the wiring work time becomes long.

  In addition, when an optical fiber cable with a small diameter is exposed and wired on a wall surface, there is a possibility that it will be damaged due to an object hitting it. Further, when a small-diameter optical fiber cable is damaged, a dedicated connection member such as a connector or a dedicated tool for extracting and cutting the optical fiber core wire is required for repairing the optical fiber cable. For this reason, unless it is a specialized construction contractor, it is not possible to easily perform rewiring or connection for repairing the damaged part.

  On the other hand, since the optical fiber cable of Patent Document 1 can be directly wired to the installation surface with an adhesive tape, the above-mentioned problems of the optical fiber cable of Non-Patent Document 1 can be avoided.

  However, in the case of fixing the optical fiber cable of Patent Document 1 to a wall surface or the like with an adhesive tape such as a double-sided tape, depending on the material or shape (uneven shape) of the wall surface, for example, the wall cannot be fixed with sufficient adhesive force. There is. Further, the optical fiber cable is easily peeled off from the wall surface due to the secular change of the adhesive tape. For this reason, it is difficult for the optical fiber cable of patent document 1 to maintain a stable wiring state, for example, when wiring directly on the wall surface in a house. In addition, when removing the adhesive tape when removing the optical fiber cable, the wallpaper may be damaged.

  On the other hand, when fixing an optical fiber cable to the wall surface in a house by pinning, the said problem which arises when fixing an optical fiber cable with an adhesive tape can be avoided. However, an optical fiber cable that can be fixed by such pinning has not been developed yet.

  In addition, the electric pipe and the electric wire protective cover for accommodating the thin optical fiber cable can be fixed to the wall surface with an adhesive tape, or can be fixed by pinning. However, when a conduit tube or a wire protective cover is used, problems such as an increase in cost, bulkiness, and a long working time are caused as described above.

  Accordingly, an object of the present invention is to provide an optical fiber cable that can be easily and appropriately wired to, for example, a wall surface in a house by pinning.

  In order to solve the above-described problems, an optical fiber cable of the present invention includes an optical fiber core and an element portion that extends in the longitudinal direction of the optical fiber cable, and has an outer sheath that covers the optical fiber core. An element protection portion disposed on both sides of the element portion in the width direction and having a recess into which a pin is driven, and extending in the longitudinal direction of the optical fiber cable; and the element portion and the element protection portion. And a neck portion to be connected.

  According to said structure, an element protection part is arrange | positioned on the both sides of the width direction of an element part, has a recessed part where a pin is struck in the upper surface, and is extended in the longitudinal direction of an optical fiber cable. As a result, the operator can easily fix the optical fiber cable by pinning, for example, using a pinning tool when wiring the optical fiber cable on a wall surface in the house, for example.

  In other words, the operator only needs to drive the pin toward the concave portion of the element protection portion when pinning, and can perform the operation while clearly recognizing the position where the pin is driven. Accordingly, the pinning operation can be performed easily and appropriately without removing the pin from the predetermined pinning position, that is, from the concave portion, and without damaging the optical fiber core wire by accidentally driving the pin into the element portion. it can.

  Further, since the optical fiber cable is fixed to, for example, a wall surface in the house by pinning, a stable wiring state can be maintained. Furthermore, even if the wall surface is wallpaper, there is no possibility of damaging the wallpaper when the optical fiber cable is removed.

  In the above optical fiber cable, the element protection portion has a convex portion extending in the longitudinal direction of the optical fiber cable in a region opposite to the element portion side in the width direction on the upper surface, and the convex portion in the width direction on the upper surface. The region on the element portion side from the portion may be the concave portion, and the bottom surface of the concave portion may be a flat surface.

  According to said structure, the element protection part has the convex part extended in the longitudinal direction of an optical fiber cable in the area | region on the opposite side to the element part side of the width direction in an upper surface. Further, in the element protection portion, the region on the element portion side from the convex portion in the width direction on the upper surface is a concave portion for pinning, and the bottom surface of the concave portion is a flat surface.

  Therefore, the operator can pin the bottom surface of the concave portion, which is a pinning surface, that is, a flat surface, using the convex portion as a guide portion. For example, it is possible to place a pinning tool using the convex portion as a guide portion and pin the pinning surface. Thereby, the pinning operation can be further easily and appropriately performed.

  In the above optical fiber cable, the concave portion of the element protection portion may be a groove portion extending in the longitudinal direction of the optical fiber cable.

  According to said structure, the recessed part where the pin of an element protection part is driven in is a groove part extended in the longitudinal direction of an optical fiber cable. Therefore, the operator can easily perform pinning while checking the groove. Thereby, the pinning operation can be further easily and appropriately performed.

  In the above optical fiber cable, the element protection unit may have a configuration in which a support line extending in a longitudinal direction of the optical fiber cable is embedded in a region excluding a region directly below the concave portion.

  According to the above configuration, since the support line extending in the longitudinal direction of the optical fiber cable is embedded in the element protection part except for the area directly below the recess where the pin is driven, the optical fiber cable is fixed. The pinning to do is not disturbed by the support line.

  When the support wire is a steel wire, the element protection portion, that is, the optical fiber cable can be easily arranged in a straight line when the optical fiber cable is wired.

  In the above-described optical fiber cable, the element protection portion may be configured to have an inclined surface that is inclined so that a side surface opposite to the element portion side is tilted toward the element portion.

  According to the above configuration, the optical fiber cable has an inclined surface that is inclined so that the side surface opposite to the element portion side of the element protection portion falls toward the element portion, so that an object is caught, Things are hard to collide with. Furthermore, for example, it is difficult to stand out when wired on the wall surface in the house.

  In the above optical fiber cable, the element protection portion may be thicker than the element portion.

  According to said structure, when another thing collides with an optical fiber cable, the collision to an element part can be prevented by an element protection part. Moreover, even if another object collides with the element part due to the positional relationship between the upper surface of the element protection part and the upper surface of the element part, the element part can retreat in the direction of the installation surface (for example, the wall surface). Therefore, the impact received by the element portion due to the collision of other objects is reduced.

  In the above optical fiber cable, the element portion is embedded with tensile strength members extending in the longitudinal direction of the optical fiber cable on both sides in the width direction of the element portion with respect to the optical fiber core wire, and the position of the lower surface of the element portion is A configuration may be adopted in which the position is higher than the position of the lower surface of the element protection portion.

  According to said structure, when installing an optical fiber cable in an installation surface (for example, wall surface), a clearance gap arises between the lower surface of an element part, and an installation surface. Accordingly, the bending radius R of the optical fiber core wire can be increased only by the gap, that is, only the portion where the element portion is lifted from the installation surface, and an increase in transmission loss due to the small bending radius R is suppressed. Can do. In addition, the optical fiber cable can be easily arranged when it is arranged to be bent, for example, by 90 ° on the installation surface.

  That is, since the element portion is embedded with tensile strength members on both sides in the width direction of the element portion with respect to the optical fiber core wire, when the optical fiber cable is placed on the installation surface by bending, for example, 90 °, both tensile strengths are applied at the bent portion. It is necessary to avoid differences in body length. For this purpose, in the bent portion of the optical fiber cable, both element protection portions are appropriately cut, and the element portion is erected so that the width direction is in the vertical direction. This operation can be easily and appropriately performed because the position of the lower surface of the element portion is higher than the position of the lower surface of the element protection portion.

  In the above optical fiber cable, the element protection part may have a thickness greater than a width of the element part.

  According to said structure, in the bending part of an optical fiber cable, an element part is arrange | positioned in the standing state so that the width direction may be an up-down direction. In such a case, when another object collides with the bent portion of the optical fiber cable, the other object does not collide with the element part but collides with the element protection part. Therefore, the optical fiber cable can protect the element portion from collision of other objects by the element protection portion at the bent portion.

  According to the configuration of the present invention, when an optical fiber cable is wired while being fixed to a wall surface in a house by pinning, for example, the operator accidentally drives the pin into the element portion and damages the optical fiber core wire. Therefore, the pinning operation can be performed easily and appropriately. Further, since the optical fiber cable is firmly fixed by the pins, a stable wiring state can be maintained. Furthermore, even if the wall surface is wallpaper, there is no possibility of damaging the wallpaper when the optical fiber cable is removed.

It is a top view which shows the optical fiber cable of embodiment of this invention. It is an AA arrow directional cross-sectional view in FIG. It is explanatory drawing of the dimensional relationship of each part in the optical fiber cable shown in FIG. It is a top view which shows the state which fixed the optical fiber cable shown in FIG. 1 to the wall surface in a house, for example with a pin. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4. It is a longitudinal cross-sectional view which shows the state which fixed the optical fiber cable shown in FIG. 1 to the wall surface from the staple. It is a longitudinal cross-sectional view which shows the structure of the optical fiber cable which concerns on the comparative example with respect to the optical fiber cable shown in FIG. It is a longitudinal cross-sectional view which shows the structure of the optical fiber cable of other embodiment of this invention.

[Embodiment 1]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing an optical fiber cable according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 and 2, the optical fiber cable 1 includes an element portion 11, two element protection portions 12, and two neck portions 13. The two element protection parts 12 are arranged at the left and right positions of the element part 11 and are connected to the element part 11 by a neck part 13. Each neck portion 13 continuously connects the element portion 11 and the element protection portion 12 in the longitudinal direction of the optical fiber cable 1. In addition, each neck part 13 may connect the element part 11 and the element protection part 12 not intermittently but intermittently (discontinuously).

  The element unit 11 includes an optical fiber core wire 21, a linear tensile strength body 22, and a jacket 23 that covers the optical fiber core wire 21 and the tensile strength body 22. That is, in the element portion 11, the optical fiber core wire 21 and the linear strength member 22 are embedded in the outer sheath 23.

  The longitudinal cross-sectional shape of the jacket 23 is, for example, a horizontally long substantially rectangular shape. The optical fiber core wire 21 is disposed at the center of the outer sheath 23, and the strength member 22 is disposed at the left and right positions of the optical fiber core wire 21. The optical fiber core wire 21 and the strength member 22 are arranged in parallel in the left-right direction (lateral direction) and extend in the longitudinal direction of the optical fiber cable 1.

  The optical fiber core 21 includes, for example, a glass optical fiber provided at the center, a fiber coating layer that covers the outer periphery of the glass optical fiber, and a colored layer that covers the fiber coating layer and forms the outermost layer. .

  The strength member 22 prevents the optical fiber cable 1, particularly the element portion 11, from being stretched by a tensile force and protects the optical fiber core wire 21. The tensile body 22 can be formed of, for example, a metal wire such as glass FRP or steel wire in addition to an aramid FRP. The tensile body 22 is excellent in flexibility and buckling resistance like the aramid FRP when the element protection part 12 is removed and the element part 11 is taken into the connection box such as an optical rosette. It is preferable to form with a striatum. The cross-sectional shape of the strength member 22 may be a square or an ellipse in addition to the circle shown in FIG.

  The jacket 23 is made of a general thermoplastic resin such as polyethylene, polypropylene, or polystyrene. These resins may be flame retardant resins containing a flame retardant such as magnesium hydroxide. Note that the element protection portion 12 and the neck portion 13 can also be formed of the same material as the outer cover 23 of the element portion 11. For example, the outer cover 23, the element protection part 12, and the neck part 13 of the element part 11 may be integrally formed with the same thermoplastic resin.

  A notch groove 24 for taking out the optical fiber core wire 21 is formed at positions of the upper surface and the lower surface of the jacket 23 corresponding to the position of the optical fiber core wire 21. The notch groove 24 is formed in a V shape with the tip facing the direction of the optical fiber core 21 and extends in the longitudinal direction of the optical fiber cable 1. In the optical fiber cable 1, since the notch groove 24 is formed, it is possible to take out the optical fiber core wire 21 by peeling the outer cover 23 from the portion of the notch groove 24.

  The vertical cross-sectional shape of both element protection parts 12 is a trapezoid in which the side facing the element part 11 is perpendicular to the lower side (lower base) and the opposite side is an inclined side inclined toward the element part 11 side. In FIG. 3, the element portion 11 side portion on the upper side (upper bottom) is cut into a horizontally long rectangular shape. Therefore, the element protection part 12 has the convex part 31 extended in the longitudinal direction of the optical fiber cable 1 in the outer edge part in the upper surface. Moreover, the element protection part 12 has a flat surface in a state of being recessed with respect to the convex part 31 at a part on the element part 11 side with respect to the convex part 31 on the upper surface. This flat surface is a pinning surface (concave portion) 32.

  The element protection unit 12 has a support line 33 in a region excluding the region directly below the pinning surface 32 inside the element protection unit 12. The support line 33 provides the element protection part 12 with an extension preventing function and strength against a tensile force. The support wire 33 can be formed of a metal material such as steel, iron, copper, aluminum, or an aluminum alloy. Note that the support wire 33 is preferably a steel wire in consideration of linearity for maintaining the optical fiber cable 1 in a straight line. Further, the shape of the support line 33 may be a square or an ellipse in addition to the circle shown in FIG.

  The neck portion 13 supports the element portion 11 at a position where the lower surface of the element portion 11 is above the lower surface of the element protection portion 12. Thereby, when the optical fiber cable 1 is installed on a wall surface, the element part 11 will be in the state which floated with respect to the wall surface.

  The thickness of the neck portion 13 is thinner than the thickness of the element portion 11.

  Next, the dimensional relationship of each part in the optical fiber cable 1 will be described. FIG. 3 is an explanatory view showing the dimensional relationship of each part in the optical fiber cable 1.

  In FIG. 3, a is the thickness of the element portion 11, b is the width of the element portion 11, c is the thickness of the element protection portion 12, and d is the width (maximum width) of the optical fiber cable 1. In the optical fiber cable 1, the thickness c of the element protection part 12 is greater than the thickness a of the element part 11. Further, the thickness c of the element protection part 12 is larger than the width b of the element part 11. Further, the position of the upper surface of the element protection part 12 (projection 31) is higher than the position of the upper surface of the element part 11. Further, the position of the lower surface of the element part 11 is higher than the position of the lower surface of the element protection part 12.

  The wiring method of the optical fiber cable 1 in the above configuration will be described below. FIG. 4 is a plan view showing a state in which the optical fiber cable 1 is fixed to, for example, a wall surface in the house with pins. 5 is a cross-sectional view taken along line BB in FIG.

  As shown in FIGS. 4 and 5, when the optical fiber cable 1 is fixed to the wall surface 42 in the home, for example, the pins 41 are driven from the pinning surface 32 of the optical fiber cable 1 toward the wall surface. The pinning is performed, for example, alternately with respect to both element protection portions 12 so that the pinning positions are in a plover shape.

  Pinning can be performed using, for example, a pinning tool. This pinning tool has, for example, a long and narrow pen shape, and can be pinned by accommodating the pin 41 therein and pressing the tip portion against the pinning surface 32 of the optical fiber cable 1 and pushing it in. . As this pinning tool, for example, “Pontaro (product surface)” manufactured by Masaru Kogyo can be used.

  Here, in the element protection part 12 of the optical fiber cable 1, a convex part 31 is formed outside the pinning surface 32 in the width direction. Therefore, the operator can pin the pinning surface 32 using the convex portion 31 as a guide portion. For example, a pinning tool can be arranged using the convex portion 31 as a guide portion, and pinning can be performed on the pinning surface 32. Therefore, the pinning operation can be easily performed without removing the pin 41 from the pinning surface 32 and without damaging the optical fiber core wire 21 by accidentally driving the pin into the element portion 11.

  In addition, since the support line 33 of the element protection unit 12 is embedded in a region excluding the region directly below the pinning surface 32, pinning to the pinning surface 32 is not obstructed by the support line 33. .

  In addition, since the optical fiber cable 1 is fixed to, for example, a wall surface in the house by the pin 41, it can be securely and firmly fixed without being affected by the wall surface, for example, the material or shape (uneven shape) of the wallpaper. In addition, it is difficult for the optical fiber cable 1 to peel off from the wall surface over time.

  When the optical fiber cable 1 is removed, the wallpaper is less damaged and the hole with a small pin mark can be repaired with a caulking material or the like so as not to be noticeable.

  Further, the optical fiber cable 1 does not need to be installed in a pipe or a protective cover, and can be wired directly on a wall surface or the like. Therefore, compared with the case where it is installed in the pipe or the protective cover, the optical fiber cable 1 can be wired at a low cost and in a short working time, without being bulky due to the pipe or the protective cover and without being noticeable. it can.

  In addition, element protection portions 12 are provided on both sides of the element portion 11, and the thickness of the element protection portion 12 is greater than the thickness of the element portion 11. Therefore, when another object collides with the optical fiber cable 1, the element protection part 12, in particular, the convex part 31 can prevent another object from colliding with the element part 11. Even if another object may collide with the element portion 11 due to the positional relationship between the upper surface of the element protection portion 12 (convex portion 31) and the upper surface of the element portion 11, the element portion 11 moves toward the wall surface 42. Since it can retreat, the impact which the element part 11 receives by the collision of another thing becomes small.

  Further, in the optical fiber cable 1, in particular, since the position of the upper surface of the element protection portion 12 (convex portion 31) is higher than the position of the upper surface of the element portion 11, the collision prevention of other objects to the element portion 11 is prevented. The functionality is even higher.

  In addition, a support wire 33 is embedded in the element protection unit 12. When the support wire 33 is a steel wire, for example, when the optical fiber cable 1 is wired, it can be easily wired in a straight line. it can. That is, in order to route the optical fiber cable 1 in a straight line, workers are arranged at both ends of the optical fiber cable 1 or the optical fiber cable 1 is wired while confirming the linear state of the optical fiber cable 1 with a scale or the like. It becomes unnecessary.

  In addition, the optical fiber cable 1 is inclined inward so that the side surfaces of both element protection portions 12 fall down toward the element portion 11. This makes it difficult for objects to be caught or collide with the optical fiber cable 1. Furthermore, even when the optical fiber cable 1 is wired on, for example, a wall surface in the house, it is difficult to stand out.

  Further, since the position of the lower surface of the element portion 11 is higher than the position of the lower surface of the element protection portion 12, when the optical fiber cable 1 is wired to the wall surface 42, the lower surface of the element portion 11 and the wall surface 42 There is a gap between them. Therefore, the bending radius R of the optical fiber core wire 21 can be increased only by the gap, that is, the portion where the element portion 11 is lifted from the wall surface (installation surface) 42, and the transmission loss due to the small bending radius R. Can be suppressed. Further, when the wiring direction of the optical fiber cable 1 is bent, for example, by 90 ° on the flat wall surface 42, this operation can be easily and appropriately performed.

  That is, when the wiring direction of the optical fiber cable 1 is bent by, for example, 90 ° on the flat wall surface 42, it is necessary to prevent a difference in the lengths of both strength members 22 at the bent portion. For this purpose, at the bent portion of the optical fiber cable 1, both element protection portions 12 are appropriately cut, and the element portion 11 is erected so that the width direction is in the vertical direction. This operation can be easily and appropriately performed because the position of the lower surface of the element portion 11 is higher than the position of the lower surface of the element protection portion 12.

  Here, although it is preferable to fix the optical fiber cable 1 by pinning, it is also conceivable that the optical fiber cable 1 is fixed by staples in order to fix it more firmly, for example, fixing to a place where fixing is difficult by pinning. Therefore, the optical fiber cable 1 was actually fixed with staples, and the damage resistance of the element portion 11 was verified. FIG. 6 is a longitudinal sectional view showing a state in which the optical fiber cable 1 is fixed to the wall surface 42 by the staple 43.

  As a result of verifying the damage resistance of the element part 11, as shown in FIG. 6, the staple 43 driven into the optical fiber cable 1 bites into the upper part of the element protection part 12, but the element part 11 has no damage. I was able to confirm that. This is because in the optical fiber cable 1, the thickness of the element protection portion 12 is thicker than the thickness of the element portion 11.

(Example)
The following optical fiber cable 1 was produced, and about the produced optical fiber cable 1, the wiring construction property to the wall surface 42 was verified.

  As the optical fiber core wire 21 of the element portion 11, an optical fiber core wire having an outer diameter of 0.25 mm obtained by coating a single mode optical fiber with an ultraviolet curable resin was used. A fiber reinforced plastic (aramid FRP) containing an aramid fiber having a diameter of 0.4 mm was used for the tensile body 22 of the element portion 11. A steel wire having a diameter of 0.5 mm was used for the support wire 33 of the element protection unit 12. White flame-retardant polyethylene was used for the jacket 23, the element protection part 12, and the neck part 13 of the element part 11.

  The element portion 11 shown in FIG. 3 has a width b of 2.0 mm and a thickness a of 1.6 mm. The optical fiber cable 1 had a width d of 8.6 mm and a thickness (thickness of the element protection unit 12) c of 2.0 mm.

  When the optical fiber cable 1 thus produced was wired to the wall surface 42 by pinning, it was possible to pin it easily and appropriately. Thereby, the optical fiber cable 1 was able to be wired easily.

(Comparative example)
FIG. 7 is a longitudinal sectional view showing the configuration of the optical fiber cable 3 according to the comparative example. The optical fiber cable 3 includes an element protection unit 101 instead of the element protection unit 12 of the optical fiber cable 1. Other configurations are the same as those of the optical fiber cable 1.

  Similar to the element protection unit 12, the element protection unit 101 is thicker than the element unit 11, and the position of the upper surface of the element protection unit 101 is higher than the position of the upper surface of the element unit 11.

  However, the element protection part 101 does not have the convex part 31 which the element protection part 12 has on the upper surface, and the concave pinning surface 32 with respect to the convex part 31. In other words, the entire upper surface of the element protection unit 101 is a pinning surface. In the element protection unit 101, a support line 33 is embedded in an upper surface, that is, a region directly below the pinning surface.

  In the optical fiber cable 3 as described above, it is difficult for an operator to determine the pinning position, and there is a possibility that the pin is accidentally hit on the element portion 11 at the time of pinning. Alternatively, there is a possibility that the pin interferes with the support wire 33 and the pin cannot be hit accurately. Alternatively, there is a possibility that a pin is hit at the end of the element protection unit 101, and the pin does not work effectively for fixing the optical fiber cable 3.

[Embodiment 2]
Another embodiment of the present invention will be described below with reference to the drawings.
FIG. 8 is a longitudinal sectional view showing a configuration of an optical fiber cable 2 according to another embodiment of the present invention. The optical fiber cable 2 includes an element protection unit 51 instead of the element protection unit 12 of the optical fiber cable 1. Other configurations are the same as those of the optical fiber cable 1.

  Similar to the element protection part 12, the element protection part 51 is thicker than the element part 11, and the position of the upper surface of the element protection part 51 is higher than the position of the upper surface of the element part 11.

  However, the element protection part 51 has, in place of the pinning surface 32 of the element protection part 12, a pinning groove part 61 made of, for example, a V-shaped groove part on the upper surface. The pinning groove 61 extends in the longitudinal direction of the optical fiber cable 2. The support line 33 is embedded in a region excluding the region directly below the pinning groove portion 61 inside the element protection portion 12.

  In the above configuration, in the optical fiber cable 2, the operator can easily perform pinning while confirming the pinning groove 61.

  When the width of the pinning groove portion 61 cannot be sufficiently increased, that is, when the width of the pinning groove portion 61 and the width of the neck portion 13 are both reduced, the operator visually observes the pinning groove portion 61 and the neck portion 13. It becomes difficult to distinguish. In particular, in the wiring of the optical fiber cable 2 such as the boundary between the ceiling and the wall, it is difficult for an operator to approach the optical fiber cable 2 and check the pinned groove portion 61. In such a case, there is a possibility that a pin is accidentally hit on the neck portion 13, and therefore, the element protection portion 12 is preferable to the element protection portion 51 as a configuration of the element protection portion of the optical fiber cable.

  The present invention can be used for an optical fiber cable that can be pinned, for example, wired on a wall surface.

DESCRIPTION OF SYMBOLS 1 Optical fiber cable 2 Optical fiber cable 3 Optical fiber cable 11 Element part 12 Element protection part 13 Neck part 21 Optical fiber core wire 22 Strength member 23 Outer sheath 24 Notch groove 31 Convex part 32 Pinning surface 33 Support line 41 Pin 42 Wall surface 43 Staple 51 Element protection part 61 Pinning groove part 101 Element protection part

Claims (1)

An optical fiber core and an outer sheath covering the optical fiber core, and an element portion extending in the longitudinal direction of the optical fiber cable;
An element protection portion disposed on both sides of the element portion in the width direction, having a recess into which a pin is driven, and extending in the longitudinal direction of the optical fiber cable;
A neck for connecting the element part and the element protection part;
Tensile strength members extending in the longitudinal direction of the optical fiber cable are embedded in both sides of the element portion in the width direction of the element portion with respect to the optical fiber core wire,
The position of the lower surface of the element part is higher than the position of the lower surface of the element protection part,
The optical fiber cable is characterized in that the thickness of the element protection portion is larger than the width of the element portion.

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