JP5164927B2 - Optical fiber cable, wiring method, and cutting tool - Google Patents

Description

  The present invention relates to an optical fiber cable, a wiring method, and a cutting tool used for optical wiring in a building, particularly in an apartment or a small-scale apartment.

  In recent years, with the development of an information communication society, optical fiber communication capable of performing large-capacity data communication has begun to spread. Therefore, the number of subscribers of FTTH (Fiber To The Home) that draws optical fibers is increasing even in ordinary homes, and wiring systems for information communication using optical fibers are also used in buildings. Yes.

  Conventionally, as an optical fiber cable used for optical wiring work in a building, there is an indoor optical fiber cable (for example, refer to Patent Document 1). However, since this optical fiber cable has a constant diameter, for example, a door or the like. When trying to pass through the stenosis part, use connection equipment such as a cabinet before and after the stenosis part, use an optical fiber cable of a diameter corresponding to the space for the wiring of the stenosis part, It has been practiced to route the optical fiber cable through the wall surface as it is, or to detour to a place where no constriction exists.

JP 2003-161867 A

  Here, in order to cope with the increase in the optical wiring work accompanying the expansion of the optical service, there is a demand for the quick response of the optical wiring work in the building. However, it is necessary to provide connection equipment before and after the constriction part in the optical wiring work in the building, use a different optical fiber cable, or perform the penetration work on the wall surface near the constriction part and wire the optical fiber cable as it is, It is conceivable that detouring and wiring to a place where no constriction exists will lead to an increase in the construction time of the optical wiring work.

  In addition, the environment in the building is diverse, and for buildings where connection equipment, penetrating work, and detouring are impossible, construction will be suspended, so the HIKARI service will be expanded. It can also be an obstacle.

  The present invention has been made in view of the above problems, and changes the diameter (thickness) of the optical fiber cable by opening and closing the optical fiber cable, and the diameter (thickness) of the optical fiber cable when wiring in the constricted portion. An object of the present invention is to provide an optical fiber cable and a wiring method therefor by providing a connection article, performing a penetration work, and wiring without making a detour by partially reducing the size.

In order to solve the above-described problems, the present invention provides an optical fiber cable in which an optical fiber core wire or an optical fiber tape core wire and a tensile body are coated, wherein the tensile body is accommodated in a first covering portion. The opposing portion, the second opposing portion in which the optical fiber core wire or the optical fiber tape core wire is covered with the second covering portion, and the side portions of the first and second opposing portions are connected to each other of the optical fiber cable. And a bent portion that connects the first and second opposing portions so as to be openable and closable with the connecting portion serving as a fulcrum. Of the first and second opposing portions, the first opposing portion in which the strength member is accommodated is wired in a partially open state in accordance with the length of the constriction portion, and in a location outside the constriction portion, the first Overlapping the 1st and 2nd facing parts It is characterized in that the state to wirings.

According to the present invention, in the optical fiber cable, the bent portion and first and second opposed portions of the optical fiber cable is characterized in Rukoto integrally formed.

According to the present invention, in the optical fiber cable, a wedge, a tear string, an adhesive sheet, or an adhesive is provided continuously or intermittently between the first and second facing portions of the optical fiber cable . is there.

The present invention relates to a wiring method for wiring using the optical fiber cable, in the narrow 窄部, first to the strength members of the first and second opposed portions which were the superimposed is accommodated The wiring is performed in a state where the facing portion is partially opened according to the length of the narrowed portion, and the first and second facing portions are overlapped in a place outside the narrowed portion. And

Further, the present invention is a tool for cutting the optical fiber cable, comprising two blades, a blade width adjusting mechanism for adjusting a distance between the two blades, and a depth for inserting the two blades. it is characterized in further comprising a blade height adjusting mechanism for adjusting.

  According to the present invention, when optical wiring work is performed in a building, in a constricted portion such as a door gap, a facing portion is opened and closed by a bent portion of the optical fiber cable, and the diameter (thickness) of the optical fiber cable is reduced. By connecting optical fiber cables of different diameters before and after the stenosis part, connecting the optical fiber cable through the stenosis part without making a detour from the stenosis part Since construction work can be performed, the construction time of the optical wiring work can be reduced.

  Further, since the optical fiber cable has an opening / closing function, not only the thickness but also the width can be adjusted, and both the narrowed portion in the width direction and the narrowed portion in the thickness direction can be handled.

  In addition, when the thickness of the optical fiber cable of the present invention is set to the diameter of an arbitrary optical fiber cable, for example, an indoor optical fiber cable, other optical wiring works corresponding to the diameter, such as an optical connector, can be used as they are. In addition, since the construction can be performed without using the optical wiring work article dedicated to the present invention, it is not necessary to increase the number of items of the optical wiring construction article, and the workability of the optical wiring work can be improved.

  In addition, since the thickness increases when the opening / closing function of the optical fiber cable is not opened, excessive bending is hardly applied in the radial direction even when the optical fiber cable of the present invention is bent, and the workability is improved similarly. can do.

It is sectional drawing which shows the optical fiber cable which concerns on the 1st Embodiment of this invention. 1 is a perspective view showing an optical fiber cable according to a first embodiment of the present invention. It is sectional drawing when the optical fiber cable which concerns on the 2nd Embodiment of this invention is open | released 180 degree | times. It is a perspective view when the optical fiber cable which concerns on the 3rd Embodiment of this invention is partially open | released. It is a top view when the optical fiber cable which concerns on the 4th Embodiment of this invention is partially open | released. It is the top view which showed the state when the optical fiber cable which concerns on the 3rd Embodiment of this invention was partially open | released from the upper part. It is composition explanatory drawing which shows a state when optical wiring construction is performed using the optical fiber cable which concerns on the 3rd Embodiment of this invention. It is sectional drawing when the optical fiber cable which concerns on the 5th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 6th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 7th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 8th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 9th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 10th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 11th Embodiment of this invention is open | released. It is sectional drawing when the optical fiber cable which concerns on the 12th Embodiment of this invention is open | released. It is sectional drawing of the overlapping state of the optical fiber cable which concerns on the 13th Embodiment of this invention. It is sectional drawing of the open state of the optical fiber cable which concerns on the 13th Embodiment of this invention. It is a perspective view showing an optical fiber cable using an adhesive sheet or an adhesive as a fixing method according to an embodiment of the present invention. It is a perspective view which shows another optical fiber cable using an adhesive agent as the fixing method which concerns on embodiment of this invention. It is a perspective view which shows the optical fiber cable using a tape material as a fixing method which concerns on embodiment of this invention. It is a perspective view showing an optical fiber cable using a bind line as a fixing method according to an embodiment of the present invention. It is a perspective view which shows the optical fiber cable using a peeling sheet as the fixing method which concerns on embodiment of this invention. It is a perspective view which shows the optical fiber cable using a peeling sheet as the fixing method which concerns on embodiment of this invention. It is a perspective view which shows the optical fiber cable using a peeling sheet as the fixing method which concerns on embodiment of this invention. It is sectional drawing which shows the optical fiber cable using a magnet as the fixing method which concerns on embodiment of this invention. It is sectional drawing which shows the optical fiber cable using a wedge as a peeling method which concerns on embodiment of this invention. It is a perspective view which shows the optical fiber cable using a tear string as the peeling method which concerns on embodiment of this invention. It is a perspective view which shows the optical fiber cable of another form of the fixing method which concerns on embodiment of this invention. It is a side view which shows the optical fiber cable of another method of peeling easily the fixing method which concerns on embodiment of this invention. It is a perspective view showing an example of a cutting tool concerning an embodiment of the present invention. It is a perspective view which shows the other example of the cutting tool which concerns on embodiment of this invention. It is sectional drawing which shows operation | movement of the blade provided in the cutting tool (upper surface) which concerns on embodiment of this invention, and a blade width adjustment screw. It is the side view which showed the blade width and blade height adjustment mechanism in the cutting tool which concerns on embodiment of this invention. It is the perspective view which showed the blade width and blade height adjustment mechanism in the cutting tool which concerns on embodiment of this invention. It is a side view which shows the blade width and blade height adjustment mechanism using the slider in the cutting tool which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail.

  1 and 2 are a sectional view and a perspective view showing an optical fiber cable according to a first embodiment of the present invention. As shown in FIGS. 1 and 2, an indoor cable 1 that is an optical fiber cable covers a tension member (strength member) 4 and an optical fiber core wire 2, and is integrated along the longitudinal direction of the indoor cable 1. A concave portion 3 that forms a connected bent portion, and boundary surfaces (upper and lower) 7 of an opposing portion that can be opened and closed with the concave portion 3 as fulcrums are provided on both sides of the concave portion 3. Moreover, the indoor cable 1 is extended | stretched to the longitudinal direction, and the coated optical fiber core wire 2, the tension member 4, and the recessed part 3 are extended | stretched similarly. The tension member 4 is made of fiber reinforced plastic, steel wire or resin.

  As shown in FIG. 1, the indoor cable 1 is in contact with the boundary surface (upper and lower) 7, and in this state, the recess 3 is hollow.

  As shown in FIG. 2, the indoor cable 1 has a boundary surface (upper and lower) 7 at two opposed portions of the indoor cable (A side) 5 and the indoor cable (B side) 6 with a recessed portion 3 forming a connected bent portion as a fulcrum. The two opposing portions are variable in angle in the range of 0 to 180 degrees. The recessed portion 3 and the two opposing portions of the indoor cable (A side) 5 and the indoor cable (B side) 6 are integrated. The tension member 4 is embedded in the indoor cable (A side) 5, and the optical fiber core wire 2 is embedded in the indoor cable (B side) 6.

  FIG. 3 is a cross-sectional view when the optical fiber cable according to the second embodiment of the present invention is opened 180 degrees. As shown in FIG. 3, the indoor cable 1 that is an optical fiber cable has a concave portion 3 that serves as a fulcrum with a variable angle, and a shape that includes an optical fiber core wire 2 and a tension member 4 on the left and right sides of the concave portion 3. It has become.

  FIG. 4 is a perspective view when the optical fiber cable according to the third embodiment of the present invention is partially opened. As shown in FIG. 4, the indoor cable 1 that is an optical fiber cable can be routed and routed by opening a part of the indoor cable 1 when wiring through a narrowed portion such as a door, for example. It is. This can be achieved, for example, by opening the indoor cable (A side) 5 of the indoor cable 1 180 degrees from the indoor cable (B side) 6 and disconnecting the boundary surface (left and right) 8 as a boundary. The opening may be an angle that can ensure a thickness that can pass through the narrowed portion, even if it is not 180 degrees.

  FIG. 5 is a top view when the optical fiber cable according to the fourth embodiment of the present invention is partially opened. As shown in FIG. 5, by using a flexible material such as PVC or polyethylene for the covering member of the indoor cable 1 which is an optical fiber cable, the indoor cable (A side) 5 is connected to the boundary surface (left and right) 8. Therefore, it is possible to open 180 degrees by twisting the indoor cable (A side) 5 and the indoor cable (B side) 6 using its flexibility. In this case, an uncut boundary portion remains as in the twist portion 43.

  FIG. 6 is a top view showing from above the state when the optical fiber cable according to the third embodiment of the present invention is partially opened. When the indoor cable 1 is opened at the boundary surface (left and right) 8, the unopened portion is referred to as an overlapped state A, and the state when opened is referred to as an opened state B. It is assumed that this open state B is all applicable when the angle of the recess 3 is changed by more than 0 degrees.

  FIG. 7 is a configuration explanatory view showing a state when optical wiring work is performed using the optical fiber cable according to the third embodiment of the present invention. In this example, the wiring through the door is performed in the dwelling unit of the building. This is because the indoor cable 1 which is an optical fiber cable is wired to the wall surface 9 or the like in the overlapped state A in the route to the door 10, and the facing portion of the optical fiber cable is bent at the gap 11 which is the narrowed portion of the door 10. With the part (concave part) as a fulcrum, wiring is performed in the open state B by rotating 180 degrees, and in the overlapped state A where the opposing part of the optical fiber cable is not opened again except for the narrowed part when passing through the door Wiring.

  FIGS. 8 to 17 show an open state showing storage items and shapes such as an optical fiber core, an optical fiber tape core, and a tensile member (tension member) stored in the optical fiber cable according to the embodiment of the present invention. It is sectional drawing or sectional drawing of a superposition state.

  FIG. 8 is a cross-sectional view when the optical fiber cable according to the fifth embodiment of the present invention is opened. As shown in FIG. 8, one optical fiber core wire 2 and two tension members 4 are accommodated in an indoor cable 1 that is an optical fiber cable. In this example, the optical fiber core wire 2 is accommodated between the recesses 3 and 3.

  FIG. 9 is a sectional view when an optical fiber cable according to a sixth embodiment of the present invention is opened. As shown in FIG. 9, one optical fiber ribbon 12 and one tension member 4 are housed inside an indoor cable 1 that is an optical fiber cable. In this example, the optical fiber ribbon 12 is provided at the opposing portion. That is, an optical fiber cable that covers the optical fiber ribbon 12 and the tension member 4, and the concave portions 3 are supported on both sides of the concave portion 3 that is two bent portions along the longitudinal direction of the optical fiber cable. As shown, an openable and closable facing portion is provided. The facing portion and the recess 3 are integrally provided.

  FIG. 10 is a cross-sectional view when the optical fiber cable according to the seventh embodiment of the present invention is opened. As shown in FIG. 10, one optical fiber core 2 and two tension members 4 are accommodated in an indoor cable 1 that is an optical fiber cable. In this example, the tension member 4 is also accommodated in the opposite portion where the optical fiber core wire 2 is accommodated.

  FIG. 11 is a sectional view when an optical fiber cable according to an eighth embodiment of the present invention is opened. As shown in FIG. 11, a notch 13 is provided in parallel with the recess 3 in the facing portion of the indoor cable 1 that is an optical fiber cable. In this example, one notch 13 is provided above and below the optical fiber core wire 2. By scratching along the notch 13, the indoor cable 1 can be easily opened and the optical fiber core 2 housed therein can be easily taken out.

  FIG. 12 is a cross-sectional view when the optical fiber cable according to the ninth embodiment of the present invention is opened. As shown in FIG. 12, the shape of the concave portion 3 of the indoor cable 1 which is an optical fiber cable is a triangular cross section. For example, by changing the triangular shape of the recess 3 from an acute angle to an obtuse angle (greater than 0 and less than 180 degrees), the angle at which the indoor cable 1 is opened can be variously adjusted as compared with the circular shape.

  FIG. 13: is sectional drawing when the optical fiber cable which concerns on the 10th Embodiment of this invention is open | released. As shown in FIG. 13, the shape of the opposing part of the indoor cable 1 which is an optical fiber cable is made into a semicircle shape. By making the shape of the facing portion of the indoor cable 1 a semicircular shape, it becomes a circular shape in the overlapped state, and it becomes easy to wire the circular constricted portion.

  FIG. 14 is a sectional view when the optical fiber cable according to the eleventh embodiment of the present invention is opened. As shown in FIG. 14, the recessed part 3 of the indoor cable 1 which is an optical fiber cable is made into two. Increasing the recess 3 makes it possible to increase the facing portion in the open state, so that only one of the facing portions is opened when the shape of the constricted portion, for example, not only the height of the constricted portion but also the width is narrow. By doing so, it becomes possible to perform wiring in accordance with the narrowed portion. The covering of the indoor cable 1 is provided with a notch 13 similar to FIG.

  FIG. 15 is a sectional view when an optical fiber cable according to a twelfth embodiment of the present invention is opened. As shown in FIG. 15, the four corners of the indoor cable 1 which is an optical fiber cable are chamfered. By chamfering the four corners of the indoor cable 1 and providing the round edge 14, it is possible to reduce friction during wiring and facilitate wiring. Further, by providing the hollow storage portion 15 and the opening slit 16 in a part of the facing portion, the optical fiber core wire 2 can be stored without being covered in advance, and can be taken in and out later. .

  FIG. 16 is a cross-sectional view of an optical fiber cable according to a thirteenth embodiment of the present invention, and FIG. 17 is a cross-sectional view of the open state. As shown in FIG.16 and FIG.17, the recessed part 3 which forms the bending part which the indoor cable 1 which is an optical fiber cable connected is narrowed. By forming the recess 3 in a bridge shape instead of a notch, a gap 17 appears on the boundary surface (upper and lower) 7 of the two opposing portions when they are in an overlapping state. In this case, it becomes easy to open the facing portion when it is overlapped.

  18 to 25 show a method of fixing the indoor cable (A side) and the indoor cable (B side) in the overlapped state of the optical fiber cables according to the embodiment of the present invention. The fixing method can be performed without using the method shown in FIGS. 18 to 25. However, the fixing method becomes stronger.

  FIG. 18 is a perspective view showing an optical fiber cable using an adhesive sheet or an adhesive as a fixing method according to an embodiment of the present invention. An adhesive layer 18 to which an adhesive sheet is applied or an adhesive is applied is provided between the boundary surfaces (upper and lower) 7 serving as the boundary between the indoor cable (A side) 5 and the indoor cable (B side) 6 that are opposed to the indoor cable 1. Thus, it is possible to strengthen the fixation in the overlapped state. The adhesive layer 18 is applied continuously or intermittently.

  FIG. 19 is a perspective view showing another optical fiber cable using an adhesive as a fixing method according to an embodiment of the present invention. When the indoor cable (A side) 5 and the indoor cable (B side) 6, which are opposed to the indoor cable 1, are coated with an adhesive on the opposite side of the concave portion 3 and provided with a bonding point 19, in an overlapping state. Can be firmly fixed. This adhesion point 19 is applied continuously or intermittently.

  FIG. 20 is a perspective view showing an optical fiber cable using a tape material as a fixing method according to an embodiment of the present invention. In the overlapping state of the indoor cable 1, the tape material 20 is intermittently covered around the indoor cable 1, thereby strengthening the fixing in the overlapping state. The tape material 20 is provided with a tape removing portion 21 which is a part of play, and the tape material 20 can be easily removed by peeling the play part.

  FIG. 21 is a perspective view showing an optical fiber cable using a bind wire as a fixing method according to an embodiment of the present invention. In the overlapped state of the indoor cable 1, the bind wire 22 is covered and fixed in a spiral shape. The binding line 22 can be easily removed by cutting or the like.

  22 to 24 are perspective views showing an optical fiber cable using a release sheet as a fixing method according to an embodiment of the present invention. As shown in FIG. 22, when the indoor cable 1 is overlapped, the release sheet 23 is installed on a part of the boundary surface (upper and lower) 7 and a part of the release sheet 23 is led out from the boundary surface (upper and lower) 7. Install as described. The release sheet 23 itself may have an adhesive performance, or another substance that maintains the adhesive performance may be used. Through this release sheet 23, the indoor cable (A side) 5 and the indoor cable (B side) 6 which are opposed portions of the indoor cable 1 are firmly fixed.

  As shown in FIG. 23, the fixing method using the release sheet 23 is such that the release sheet 23 is perpendicular to the longitudinal direction of the indoor cable 1 at a portion where the indoor cable (A side) 5 and the indoor cable (B side) 6 are to be opened. A release sheet cut portion 24 that is a cut is provided. In this state, as shown in FIG. 24, by applying a force in the horizontal direction C or the vertical direction D to the release sheet 23 with the cuts using the release sheet cut portion 24, the indoor cable (A side) 5 and the indoor cable (B side) 6 is opened. The remaining release sheet 23 can be left as it is, or the release sheet 23 can be removed by making a cut in a part of the longitudinal direction of the indoor cable 1.

  FIG. 25 is a sectional view showing an optical fiber cable using a magnet as a fixing method according to an embodiment of the present invention. As shown in FIG. 25, in the indoor cable 1, a magnet 27 is accommodated in each facing portion. By using the magnetic force of the magnet 27, it can be firmly fixed in the overlapping state and can be easily peeled off.

  26 and 27 show a method of peeling the indoor cable (A side) and the indoor cable (B side) according to the embodiment of the present invention.

  FIG. 26 is a cross-sectional view showing an optical fiber cable using a wedge as a peeling method according to an embodiment of the present invention. As shown in FIG. 26, when the indoor cable 1 is overlapped, a wedge 25 leads partly from the boundary surface (upper and lower) 7 to the outside between the boundary surfaces (upper and lower) 7 of the facing portion of the indoor cable 1. Install continuously or intermittently. The wedge 25 is disposed on the side surface opposite to the concave portion 3 of the overlapping portion, and the wedge 25 itself may have an adhesive performance, or a substance having other adhesive performance may be used. When the wedge 25 is arranged, a cut may be made in the portion of the overlapping portion, or the cut portion may be arranged without making a cut, and the thickness and shape of the wedge 25 are arbitrary. By applying a pressing E to the wedge 25, a force is applied to the bonding portion 26 in the vertical direction, and the boundary portion (upper and lower) 7 is used as a boundary and peels up and down.

  FIG. 27 is a perspective view showing an optical fiber cable using a tear string as a peeling method according to an embodiment of the present invention. As shown in FIG. 27, this peeling method is mainly used at the terminal portion of the indoor cable. In this method, the tear string 28 is stored in advance or intermittently in the longitudinal direction between the boundary surfaces (upper and lower) 7 of the facing portion of the indoor cable 1 in advance. The tear string 28 can be stored without affecting the thickness of the indoor cable 1 by being stored in the gap portion between the indoor cable (A side) 5 and the indoor cable (B side) 6 in the recess 3 of the indoor cable 1. it can. The tear string 28 can be torn by pulling in the direction along the boundary surface (up and down) 7. As this fixing method, the fixing method shown in FIGS. 18 to 25 can be used.

  FIG. 28 and FIG. 29 are a perspective view and a side view showing an optical fiber cable of another method of easily separating from another form of the fixing method according to the embodiment of the present invention. As shown in FIG. 28, this fixing method is to provide the adhesion point 19 on the side surface of the indoor cable 1 as shown in FIG. 18. In this case, the V-shaped cut 29 is provided on the side surface of the indoor cable 1. Thus, since the adhesion point 19 can be provided without protruding, it can be fixed without affecting the width of the indoor cable 1. For example, as shown in FIG. 29, by applying a bending force F, the indoor cable (A side) 5 and the indoor cable (B side) 6 can be separated. This peeling method using the bending force F can be used in FIGS.

  30 to 35 show a cutting tool for cutting an optical fiber cable according to an embodiment of the present invention.

  30 and 31 are perspective views showing different examples of the cutting tool according to the embodiment of the present invention. When cutting the indoor cable 1 which is an optical fiber cable, a screw or slider is used for a mechanism for adjusting the blade-to-blade width (blade width adjusting mechanism) and a mechanism for adjusting the insertion depth of the blade (blade height adjusting mechanism). This is a cutting tool using

  As shown in FIG. 30, the cutting tool 30 includes a cutting tool (upper surface) 32 provided with a blade, a cutting tool (lower surface) 33 which is a surface for receiving the blade, a blade 34 for cutting the indoor cable 1, the blade and the blade. A cutting tool (upper surface) is provided with a blade width adjusting screw 35 that is a mechanism for adjusting the width (blade width adjusting mechanism) and a blade height adjusting screw 36 that is a mechanism for adjusting the depth of insertion of the blade (blade height adjusting mechanism). The shaft 32 and the cutting tool (lower surface) 33 can be freely opened and closed. An arbitrary portion of the indoor cable 1 can be cut by sandwiching the indoor cable 1 between the cutting tool (upper surface) 32 and the cutting tool (lower surface) 33 and adjusting the blade. Further, as shown in FIG. 31, the cutting tool 30 can use a slider for the blade width adjusting mechanism and the blade height adjusting mechanism, and the blade width adjusting slider 37 and the blade height which are mechanisms using this slider. By using the adjustment slider 38, it is possible to cut any part of the indoor cable 1 in the same manner as when using a screw.

  32 to 34 are configuration diagrams showing a blade width and blade height adjusting mechanism in the cutting tool according to the embodiment of the present invention.

  FIG. 32 is a cross-sectional view showing the operation of the blade 34 and the blade width adjusting screw 35 provided on the cutting tool (upper surface) according to the embodiment of the present invention. The blade width adjusting screw 35 can adjust the width of the blade 34 and the blade 34 according to the thread pitch of the blade width adjusting screw 35 by tightening or loosening the blade width adjusting screw (screw head) 39. It is. As shown in FIG. 33, the blade width adjusting screw 35 and the blade 34 are provided in a blade holder 41 so that the blade 34 can be freely attached to and detached from the blade holder 41. A blade height adjustment screw 36 is provided for the blade holder 41. By tightening or loosening a blade height adjustment screw (screw head) 40 on the cutting tool (upper surface) 32, the blade height 41 and the blade height are adjusted together. It is possible to adjust the height. As shown in FIG. 34, the blade width adjusting screw 35 is provided on the blade holder 41 so that the blade width and the blade height adjusting mechanism do not interfere with each other.

  FIG. 35 is a side view showing a blade width and blade height adjusting mechanism using a slider in the cutting tool according to the embodiment of the present invention. The blade width adjusting slider 37, which is a blade width adjusting mechanism using a slider, is a mechanism in which a part of the cutting tool (upper surface) 32 is hollowed and fitted and slid there. The blade 34 is provided on the blade holder 41 in the same manner as the blade width and blade height adjusting mechanism using the screw, so that the blade 34 can be freely attached and detached. The blade height adjustment slider (stopper portion) 42 in the blade height adjustment slider 38 is configured to prevent the blade presser 41 from being lowered to the lower portion, and is prevented from cutting beyond the adjusted blade depth. .

  The blade width and blade height adjustment mechanism is an example, and any combination or combination can be used as long as these functions are not impaired.

  Moreover, it is also possible to use a commercially available tool as the cutting tool. For example, the indoor cable (A surface) opened in the indoor cable 1 of FIG. 4 is cut along the recess 3 using a nipper or a cutter. It is also possible.

  As described above, according to the present invention, an optical fiber cable coated with an optical fiber core wire or an optical fiber tape core wire and a tensile body, wherein one or more bent portions (concave portions) along the longitudinal direction, By providing two or more opposing portions that can be opened and closed with the bent portion as a fulcrum on both sides of the bent portion, the opposing portion of the optical fiber cable can be opened even in a narrowed portion such as a gap of a door. Optical wiring work can be performed by reducing the diameter (thickness). The bent portion and the facing portion of the optical fiber cable may be provided integrally.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  DESCRIPTION OF SYMBOLS 1 ... Indoor cable, 2 ... Optical fiber core wire, 3 ... Recessed part, 4 ... Tension member (strength body), 5 ... Indoor cable (A side), 6 ... Indoor cable (B side), 7 ... Interface (upper and lower) , 8 ... Boundary surfaces (left and right), 9 ... Wall surface, 10 ... Door, 11 ... Gap, 12 ... Optical fiber ribbon, 13 ... Notch, 14 ... Round edge, 15 ... Storage part, 16 ... Slit, 17 ... Gap 18 ... Adhesive layer, 19 ... Adhesion point, 20 ... Tape material, 21 ... Tape material removal part, 22 ... Bind line, 23 ... Peeling sheet, 24 ... Peeling sheet cut part, 25 ... Wedge, 26 ... Adhesion part, 27 DESCRIPTION OF SYMBOLS ... Magnet, 28 ... Ripped string, 29 ... V-cut, 30 ... Cutting tool, 31 ... Shaft, 32 ... Cutting tool (upper surface), 33 ... Cutting tool (lower surface), 34 ... Blade, 35 ... Blade width adjusting screw, 36 ... Blade height adjusting screw, 37 ... Blade width adjusting sli 38 ... Blade height adjusting slider, 39 ... Blade width adjusting screw (screw head), 40 ... Blade height adjusting screw (screw head), 41 ... Blade holder, 42 ... Blade height adjusting slider (stopper), 43 ... Twist part A: Overlapping state, B: Open state, C: Horizontal direction, D: Vertical direction, E: Pressing, F: Bending force

Claims (5)

An optical fiber cable coated with an optical fiber core or an optical fiber ribbon and a tensile body,
A first facing portion that houses the strength member in a first covering portion;
A second facing portion in which the optical fiber core wire or the optical fiber tape core wire is covered with a second covering portion;
The side parts of the first and second opposing parts are connected to each other along the longitudinal direction of the optical fiber cable, and the first and second opposing parts are overlapped so as to be openable and closable with the connecting part as a fulcrum. To bend and
Comprising
In the stenosis part, the first opposing part in which the tensile body is accommodated among the superimposed first and second opposing parts is wired in a state of being partially opened according to the length of the stenosis part, An optical fiber cable , wherein the first and second opposing portions are overlapped at a location outside the constricted portion . A fiber optic cable according to claim 1 the bent portion and the first and second opposed portions of the optical fiber cable, characterized in Rukoto integrally formed. The optical fiber cable according to claim 1 or 2, wherein a wedge, a tear string, an adhesive sheet, or an adhesive is provided continuously or intermittently between the first and second opposing portions of the optical fiber cable. A wiring method for wiring using the optical fiber cable according to any one of claims 1 to 3, wherein the strength member is accommodated in the constricted portion among the superimposed first and second opposing portions. In addition, wiring is performed with the first facing portion partially opened in accordance with the length of the constricted portion, and the first and second facing portions are overlapped at a place outside the constricted portion. An optical fiber cable wiring method comprising: A tool for cutting the optical fiber cable according to any one of claims 1 to 3, and two blades, the blade width adjusting mechanism for adjusting the spacing of the two blades, the two blades optical fiber cutting tool cable, characterized in that it comprises a blade height adjusting mechanism for adjusting the depth of insertion.

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