JP2010197691A - Straight splicing closure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a straight splicing closure, not complicated in structure and efficiently repairing a broken optical drop cable. <P>SOLUTION: The straight splicing closure 10 is used for repairing breaking of an optical drop cable 1 led into a subscriber's house from an optical fiber cable of a main line. The closure 10 includes: a suspension cable fixing rod 11 for fixing one and the other suspension cables 1c of the broken optical drop cable 1 at both ends, respectively; a holder 12 for storing one and other coated optical fibers 1a of the broken optical drop cable, a jumper coated optical fiber 2 connected to the coated optical fiber 1a and connections (right and left sleeves 3<SB>L</SB>, 3<SB>R</SB>) between the coated optical fibers 1a and the jumper coated optical fiber; and an opening and closing cover 13 for enclosing the suspension cable fixing rod 11 and the holder 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a linear connection closure, and more particularly, to a linear connection closure suitable for repairing a broken optical drop cable (drawn cable).

  Conventionally, the optical drop cable 1 drawn from the trunk optical fiber cable laid between the utility poles (supports) to the subscriber's house is disconnected at the disconnection point shown in FIG. When the length of the optical drop cable 1 is insufficient for the fusion splicing, the repair work is performed by one of the following two methods.

(1) Replacement from the disconnection point to the media converter (M / C) As shown in FIG. 9A, the optical drop cable 1 from the disconnection point to the subscriber's house is replaced with a new optical drop cable 1 ′. The media converter (M / C) 5 installed in the subscriber's house is replaced with a new media converter 5 ′.
At this time, a new optical drop cable 1 ′ is connected to the original optical drop cable 1 using the linear connection closure 100.

(2) Replacement from the disconnection point to the termination box As shown in FIG. 9 (b), the optical drop cable 1 from the disconnection point to the subscriber's house is replaced with a new optical drop cable 1 ′ and the subscriber's house A new termination box 110 is newly attached to the wall surface, and a new optical drop cable 1 ′ and the media converter 5 are connected via the termination box 110.

In addition, as the linear connection closure which aimed at size reduction and weight reduction, there exists the following.
(1) In Patent Document 1 below, an optical fiber is wound around a spiral groove on the outer peripheral surface of a main body, and the end of this optical fiber is unwound from the end of the main body and taken out. The optical fiber of the cable is passed through the hole in the lid, and the end of the optical fiber of the dropped drop optical fiber cable is unraveled and connected to the end of the optical fiber by fusion or mechanical splice connection. By inserting the excess part of the fiber into the cavity of the main body while storing the connection part in the cavity of the main body and fixing the lid to the main body, it is easy and no matter where the drop optical fiber cable breaks. An optical fiber cable connection auxiliary device that can be properly connected is disclosed.
(2) The following Patent Document 2 describes a straight connection structure of an optical drop cable in which an optical fiber core portion and a support wire are integrated, and two support wires attached to two bolts attached to a connection member. Each end of the cable is fixed to the connection member by winding and tightening, and each support wire is covered with a spiral tube, and a mechanical splice that connects the optical fibers on both sides is turned around the connection member to place each optical fiber on the outer circumference of the spiral tube. In that state, the mechanical splice is attached to the mechanical splice mounting portion of the connecting member, and the whole is housed in a protective sleeve, and end caps are put on both ends to provide and support an extra length. The optical drop cable straight line connection structure is designed so that sufficient tension can be obtained even if the wire is fixed with the resin covered. There has been disclosed.
(3) The following Patent Document 3 describes a support line connecting portion to which a support line exposed from the ends of both optical drop cables is connected, and an optical fiber exposed from the ends of both optical drop cables. It has an optical fiber connection part where terminals are connected with a surplus length, and a cylindrical surplus length storage guide mounted on the connected support line, and an optical fiber is connected to the outer periphery of the cylindrical surplus length storage guide An optical drop cable connecting portion is disclosed which is small and light and has few restrictions on installation locations by being wound in a state where the extra length ensures an allowable minimum bending diameter of the optical fiber.

JP 2005-031521 A Japanese Patent Laying-Open No. 2005-070564 JP 2004-325998 A

However, the above-mentioned two repair methods have a problem that the work period is restricted because the customer needs adjustment when performing the replacement work in addition to the problem that the replacement work of the optical drop cable 1 is necessary. It was.
Further, in the repairing method in which the replacement from the disconnection point to the media converter is performed, the connector cable 7 for connecting the new media convert 5 ′ and the personal computer (PC) 6 in order to replace the media convert 5 with the new media convert 5 ′. There is also a problem that a fusion splicing operation for connecting the new media convert 5 'and the new media convert 5' is also necessary.
Furthermore, in the repairing method for re-covering from the disconnection point to the termination box, it is necessary for the subscriber to obtain an understanding of attaching the termination box 110 to the wall surface of the subscriber's house, and the installation work of the termination box 110 is also required. There was a problem that it was necessary.

In order to prevent the optical drop cable 1 from being replaced, the optical drop cable for connection 1 ″ having a predetermined length and two linear connection closures (first and second linear connection closures 100 ₁ , 100 ₂ ) is prepared, and a repair method for connecting the optical drop cables 1 disconnected via the connection optical drop cable 1 ″ as shown in FIG. 10 is also conceivable.
However, in such a repair method, it is necessary to take a sufficient length of the connecting optical drop cable 1 ″, so that there are problems that it takes construction time and the workability is poor.
Further, if the first and second linear connection closures 100 ₁ , 100 ₂ vibrate separately due to wind or the like, the optical drop cable 1 and the connection optical drop cable 1 ″ are likely to be disconnected. Therefore, the first and second straight lines Although it is conceivable to cover the connection closures 100 ₁ , 100 ₂ with a single cover, there arises a problem that the length of the cover becomes longer and further construction time is required.

The linear connection closures disclosed in the above-mentioned Patent Documents 1 to 3 have a complicated structure for the linear connection closure or an increased number of work procedures for the replacement work of the optical drop cable for the following reasons. There's a problem.
(1) In the optical fiber cable connection auxiliary disclosed in the above-mentioned Patent Document 1, the optical fiber is wound around a spiral groove on the outer peripheral surface of the main body, or the optical fiber of the drop optical fiber cable is connected to the lid. It is necessary to penetrate the hole or to fix the lid part to the main body part.
(2) In the straight connection part structure of the optical drop cable disclosed in Patent Document 2 above, a spiral tube is put on each support line, or a mechanical splice that connects optical fibers on both sides is rotated around the connection member. Thus, each optical fiber must be spirally wound around the outer periphery of the spiral tube.
(3) In the connection portion of the optical drop cable disclosed in the above-mentioned Patent Document 3, the optical fiber connection extra length is wound around the outer circumference of the cylindrical extra length storage guide in a state where the allowable minimum bending diameter of the optical fiber is secured. It needs to be attached.

  An object of the present invention is to provide a linear connection closure that is not complicated in structure and that can efficiently repair a disconnected optical drop cable.

The linear connection closure of the present invention is a linear connection closure (10; 60; 90) used for repair when the optical drop cable (1) drawn from the trunk optical fiber cable to the subscriber's home is disconnected. , Rod-shaped optical drop cable fixing means (11; 61; 70; 80) for fixing one and the other of the disconnected optical drop cable at both ends, respectively, and the cores of one and the other of the disconnected optical drop cable To accommodate the wire (1a), the jumper core wire (2) connected to the core wire, and the connecting portion (3 _L , 3 _R ; 4 _L , 4 _R ) between the core wire and the jumper core wire A holder (12; 21; 31; 41; 51) and an openable / closable cover (13; 91) for storing the optical drop cable fixing means and the holder. To.
Here, the optical drop cable fixing means includes suspension line fixing means (11 _L1 , 11 _L2 , 11 _R1 , 11 _R2 ; 71; 81) for fixing one and the other suspension lines of the disconnected optical drop cable. Suspension wire fixing rods (11; 70; 80) provided at both ends may be used.
The optical drop cable fixing means is an optical drop cable fixing rod (61) provided with holding fittings (61 _L , 61 _R ) for holding one and the other of the disconnected optical drop cables respectively at both ends. There may be.
Sponge member (12a; 51a) in which a break having a predetermined depth is formed in the holder (12; 51) along the longitudinal direction of the holder from one end surface to the other end surface of the holder or in a strip shape. May be fitted.
The core wire and the jumper core wire are connected using a mechanical splice (4 _L , 4 _R ), and the holder (21; 31) is attached to two side surfaces so as to face each other, and A plurality of holding protrusions (21a; 31a) for holding the mechanical splice by adjusting the holding position according to the length of the jumper core wire may be provided.
The plurality of holding protrusions (21a) may be attached at intervals that can hold the both end faces of the mechanical splice.
The plurality of holding protrusions (31a) may be attached at intervals that can hold and hold two or more side surfaces of the mechanical splice.
The core wire and the jumper core wire are connected using a mechanical splice (4 _L , 4 _R ), and the holder (41) has a sponge member (41a) for embedding and holding the mechanical splice. You may have.
The optical drop cable fixing means, the holder and the cover may be integrated.

  The linear connection closure of the present invention fixes one and the other of the disconnected optical drop cable to both ends of the rod-shaped optical drop cable fixing means, and the one and the other cores of the disconnected optical drop cable and the jumper core After connecting the cable, it is only necessary to store the core wire, jumper core wire and connection part in the holder, so that the structure can be simplified and the disconnected optical drop cable can be repaired efficiently. Play.

It is a figure for demonstrating the structure of the linear connection closure 10 by one Example of this invention. It is a figure for demonstrating the method to repair the disconnected optical drop cable 1 using the linear connection closure 10 shown in FIG. It is a figure for demonstrating the method to repair the disconnected optical drop cable 1 using the linear connection closure 10 shown in FIG. It is a figure which shows the example of a structure of the holder used when connecting the spliced core wire 1a and the jumper core wire 2 of the optical drop cable 1 which was disconnected, (a) is a figure which shows the structure of the holder 21. (B) is a figure which shows the structure of the holder 31, (c) is a figure which shows the structure of the holder 41, (d) is a figure which shows the structure of the holder 51. The left and right grips 61 _L and 61 _R used in place of the first and second left protrusions 11 _L1 and 11 _L2 and the first and second right protrusions 11 _R1 and 11 _R2 shown in FIG. 1 will be described. It is a figure for doing. It is a figure for demonstrating the hanging wire fixing rods 70 and 80 used instead of the hanging wire fixing rod 11 shown in FIG. 1, (a) is a figure which shows the structure of the hanging wire fixing rod 70, (b) is a hanging wire. FIG. 4 is a diagram showing a configuration of a fixing rod 80. A diagram showing a configuration of the end faces the first through hole 91c straight connector closure 90 provided with the rectangular cover 91 in which the second through hole 91c ₂ is formed on the lower side of the _1, (a) the surface It is a front view in the state where cover 91 was opened, and (b) is a side view in the state where surface cover 91 was closed. It is a figure for demonstrating the conventional repair operation | work when the optical drop cable 1 is disconnected. It is a figure for demonstrating the conventional repair operation | work when the optical drop cable 1 is disconnected. Is a diagram for explaining a repairing method using the connecting optical drop cable 1 "and the first and second linear connecting closure 100 _1, 100 ₂ in order to eliminate the replacement of the optical drop cable 1.

  For the above purpose, it is connected to the rod-shaped optical drop cable fixing means for fixing one and the other of the disconnected optical drop cable at both ends, respectively, and one and the other optical core and the core of the disconnected optical drop cable. This is realized by including a jumper core wire and a holder for storing a connection portion between the core wire and the jumper core wire.

Hereinafter, embodiments of the linear connection closure of the present invention will be described with reference to the drawings.
In the following description, as shown in FIG. 5B, the optical drop cable 1 includes a main body portion (portion in which the core wire 1a and the tension member 1b are accommodated) and a hanging wire portion (in which the hanging wire 1c is accommodated). Part).

  A linear connection closure 10 according to an embodiment of the present invention includes a hanging wire fixing rod 11 and a holder 12 shown in FIG. 1A, and a cover 13 shown in FIG.

Here, the first and second left protrusions 11 _L1 and 11 _L2 are arranged at a predetermined interval in the direction perpendicular to the longitudinal direction of the suspension line fixing rod 11 at the left end of the suspension line fixing rod 11 in FIG. The first left protrusion 11 _L1 and the second left protrusion 11 _L2 are attached in this order from the left end side of the suspension wire fixing rod 11, and the first and second left protrusions 11 _L2 are attached to the right end of the suspension wire fixing rod 11 in the figure. second right protrusions 11 _R1, 11 _R2 is longitudinal and right first right protrusions 11 _R1 and the second right projection from side 11 in the direction perpendicular lines suspended with a predetermined gap secured to rod 11 of the suspension wire retainer bar 11 _R2 It is attached in the order of.

The holder 12 has a U-shaped cross-sectional shape (a cross-sectional shape viewed along the longitudinal direction of the holder 12 when cut in a direction perpendicular to the longitudinal direction of the holder 12) having a bottom surface and two side surfaces. is doing. Further, the holder 12 has first and second left protrusions 11 _L1 and 11 _L2 and first and second right protrusions 11 _R1 on the upper surface of the holder 12 for protecting the core wire 1a and effectively utilizing the extra length. 11 _R2 is attached to the hanging wire fixing rod 11 so as to be positioned.
In addition, a sponge member 12 a is formed in the holder 12 in which a cut having a predetermined depth is formed along the longitudinal direction of the holder 12 from the left end surface to the right end surface.

The cover 13 is for storing the first and second left protrusions 11 _L1 and 11 _L2 of the linear connection closure 10, the first and second right protrusions 11 _R1 and 11 _R2, and the holder 12. A semi-cylindrical front cover 13a and a rear cover 13b having a surface are provided. The length of the cover 13 in the longitudinal direction is such that both ends of the suspension wire fixing portion 11 protrude from the cover 13 (see FIG. 1B).
The front cover 13a is rotatable with respect to the rear cover 13b about the upper end line of the cover 13 as a central axis so that the cover 13 can be opened and closed.
Moreover, the semicircle for forming the _1st through-hole 13c1 for penetrating the suspension wire fixing rod 11 of the linear connection closure 10 when the cover 13 is closed is formed in both end surfaces of the front cover 13a and the back cover 13b. And a semicircular cutout for forming a _second through hole 13c ₂ that penetrates the main body of the optical drop cable 1 when the cover 13 is closed. It is formed near the part.

It should be noted that the jumper core wire 2 and the left and right sleeves 3 _L and 3 _R, which will be described later, are pushed into the sponge member 12a of the holder 12 from the cut and stored in advance, so that the worker can connect the jumper core wire 2 and the left side. In addition, it is not necessary to prepare the right sleeves 3 _L and 3 _R separately, and if the suspended wire fixing rod 1 and the holder 12 stored in the cover 13 are brought to the repair location, the core wire of the disconnected optical drop cable 1 Since the repair can be performed by reusing the 1a and the hanging line 1c, the repair work can be performed efficiently.

  Next, a method of repairing the disconnected optical drop cable 1 using the linear connection closure 10 according to the present embodiment will be described with reference to FIGS.

  The worker cuts both ends of the disconnected optical drop cable 1 by a predetermined length (for example, 1 to 2 cm) from the tip at the disconnection portion of the optical drop cable 1 (see FIG. 2A). Then, the suspended portion and the main body at the end of the cut optical drop cable 1 are separated by a predetermined length (see FIG. 2B).

Subsequently, the worker peels off the outer cover of one separated suspension line portion of the disconnected optical drop cable 1 by a predetermined length from the tip to expose the suspension line 1c (see FIG. 2 (c)). to the suspension wire 1c a wound on the first left projections 11 _L1 and the second left projections 11 _L2 of the straight connector closure 10 in this order (see Figure 2 (d)). In this case, by winding the first and second left projections 11 _L1, 11 _L2 shown in FIG. 2 (d) suspension wire 1c in shown behind side not only shown the front side, wire also suspended with respect to an external force from different directions 1c is made difficult to come off.
Similarly, the worker peels off the outer cover of the other separated suspension line portion of the disconnected optical drop cable 1 by a predetermined length from the tip to expose the suspension line 1c (see FIG. 2C). The exposed hanging wire 1c is wound around the first right protrusion 11 _R1 and the second right protrusion 11 _R2 of the linear connection closure 10 in this order (see FIG. 2D).
Incidentally, workers, depending on the length of the suspension wire 1c was exposed winds the suspension wire 1c was exposed only to the first left projections 11 _L1 and the first right protrusion 11 _R1.

Subsequently, the worker peels the outer cover of one of the separated main body portions of the disconnected optical drop cable 1 from the tip by a predetermined length (for example, 4 to 5 cm) to expose the core wire 1a (FIG. 3 ( a)), after connecting to fuse the jumper cord 2 taken out from the exposed to the core wire 1a and the holder 12 inside, attached to the left sleeve 3 _L taken out from the holder 12 within the fusion splice (FIG. 3 (See (b)).
Similarly, the worker peels off the outer cover of the other separated main body portion of the disconnected optical drop cable 1 by a predetermined length (for example, 4 to 5 cm) to expose the core wire 1a (FIG. 3). (a) refer), after connecting to fuse the jumper cord 2 taken out from the exposed to the core wire 1a and the holder 12 inside, attaching the right sleeve 3 _R taken out from the holder 12 within the fusion splice (FIG. 3 (b)).
In this case, the exposed core wire 1a is cut by a predetermined length (for example, 1 to 2 cm) from the tip by the fusion splicing operation.

Subsequently, the worker can remove one of the disconnected optical drop cables 1, the left core 3 a, the left sleeve 3 _L , the jumper core 2, the right sleeve 3 _R, and the other of the disconnected optical drop cable 1. The exposed core wire 1a is pushed from the cut of the sponge member 12a, and these are accommodated in the holder 12 (see FIG. 3C).

  Subsequently, the worker attaches the cover 13 to the holder 12 (see FIG. 1B).

In the above description, the core wire 1a and the jumper core wire 2 are fusion-connected, but a mechanical splice connection may be used.
In this case, the following holders 21, 31, 41 are used instead of the holder 12 shown in FIG.

(1) Holder 21
As shown in FIG. 4A, the holder 21 includes a plurality of holding projections 21a attached to two side surfaces so as to face each other.
Here, the holding projection 21 a has a semi-cylindrical shape with the bottom surface attached to the side surface of the holder 21, and is made of rubber or the like so that the left and right mechanical splices 4 _L and 4 _R can be pushed from the upper surface of the holder 21. It consists of an elastic member.
The holding projections 21a, in order to be able to adjust the holding position of the left or right mechanical splice 4 _L, 4 _R depending on the length of the jumper cord 2, the left and right mechanical splice 4 _L, 4 _R It is attached at an interval that can be held with both end faces of.

(2) Holder 31
As shown in FIG. 4B, the holder 31 includes a plurality of holding protrusions 31a attached to two side surfaces so as to face each other.
Here, the holding protrusion 31 a has a semi-cylindrical shape with the bottom surface attached to the side surface of the holder 31, and is made of rubber or the like so that the left and right mechanical splices 4 _L and 4 _R can be pushed from the upper surface of the holder 31. It consists of an elastic member.
The holding projections 31a, in order to be able to adjust the holding position of the left or right mechanical splice 4 _L, 4 _R depending on the length of the jumper cord 2, the left or right mechanical splice 4 _L, 4 _R Are attached at intervals that can be sandwiched and held between two or more side surfaces (that is, an interval narrower than the interval between the holding projections 21a shown in FIG. 4A).

(3) Holder 41
Holder 41, as shown in FIG. 4 (c), comprises a sponge member 41a for holding embed left or right mechanical splice 4 _L, 4 _R.
Here, the sponge member 41 a is fitted from the left end surface of the holder 41 to the right end surface. In addition, the sponge member 41a has a slit having a predetermined width from the left end surface to the right end surface so that the left and right mechanical splices 4 _L and 4 _R and the jumper core wire 2 can be pushed from the upper surface of the holder 41. It is formed along the longitudinal direction.

  Further, when it is necessary to prepare a long jumper core wire 2, a jumper core wire is formed by making the cut of the sponge member 51a into a grid pattern (strip shape) like the holder 51 shown in FIG. 2 may be meandered and pushed into the sponge member 51a so that the extra length of the jumper core wire 2 can be processed.

In the above description, the suspended line 1c of the disconnected optical drop cable 1 is wound around the first and second left protrusions 11 _L1 and 11 _L2 and the first and second right protrusions 11 _R1 and 11 _R2 of the linear connection closure 10. It was, but as a straight line connecting the closure 60 shown in FIG. 5 (a), is attached to the left end fittings 61 _L and the right end fitting 61 _R at both ends of the optical drop cable fixing rod 61, the optical drop cable 1 disconnected one of the may be the other of the optical drop cable 1 which is broken is fixed by holding the left end fitting 61 _L to be fixed by holding the right end fitting 61 _R.

Here, the left end fitting 61 _L, as shown in FIG. 5 (b), a mounting portion 61a to be attached to the optical drop cable fixing bar 61, the main body portion of the optical drop cable 1 (core 1a and the tension member 1b is A main body gripping portion 61b for gripping the housing portion) from the left and right, and a suspension wire for gripping the suspension portion of the optical drop cable 1 (the portion in which the suspension wire 1c is housed) from the left and right. Part holding part 61c. The mounting portion 61a of the left end fitting 61 _L is provided on the suspension wire portion gripping portion 61c side.
Right end fittings 61 _R has the same configuration as the left end fitting 61 _L.

One of the optical drop cable 1 which is broken, is inserted from hanging line section with open main body grip portion 61b as shown in FIG. 5 (b) to the left end fitting 61 _L, as shown in FIG. (C) whole body portion is pushed to the left end fitting 61 _L until inserted into the main body grip portion 61b. After that, one side of the disconnected optical drop cable 1 is crushed by a tool or a hand with the main body gripping portion 61b and the hanging wire portion gripping portion 61c in accordance with the shape of the optical drop cable 1 as shown in FIG. by parts and suspension wire portion is gripped sandwiched from right and left main body grip portion 61b and the suspension wire portion gripping portion 61c, is gripped by the left end fitting 61 _L.
Other optical drop cable 1 disconnected is gripped by the right end fitting 61 _R in the same manner.

Furthermore, instead of the suspension wire fixing rod 11 to which the first and second left protrusions 11 _L1 and 11 _L2 and the first and second right protrusions 11 _R1 and 11 _R2 shown in FIG. The hanging wire fixing rod 70 shown in FIG. 6 or the hanging wire fixing rod 80 shown in FIG.

Here, the suspension wire fixing rod 70 is formed with insertion holes for inserting the suspension wire 1c of the optical drop cable 1 at both ends and screw grooves that are screwed with the fixing screws 71 at both ends. It is.
In this case, the operator inserts one hanging line 1 c of the disconnected optical drop cable 1 into the insertion hole in the left end portion of the hanging line fixing rod 70, and then attaches the upper surface of the inserted hanging line 1 c with the tip of the fixing screw 71. The other suspension line 1c of the disconnected optical drop cable 1 is inserted into the insertion hole at the right end of the suspension line fixing rod 70, and then the upper surface of the inserted suspension line 1c is pressed and fixed with a fixing screw 71.

The suspension wire fixing rod 80 is formed with insertion holes for inserting the suspension wire 1c of the optical drop cable 1 at both ends, and is formed with a predetermined length of a tapered thread groove on the outer surface of both end surface portions. Is.
In this case, the operator inserts one hanging line 1 c of the disconnected optical drop cable 1 into the insertion hole at the left end portion of the hanging line fixing rod 80, and then inserts the nut 81 into the screw groove on the left end surface portion of the hanging line fixing rod 80. After tightening and fixing the suspension line 1c with the suspension line fixing rod 80, and inserting the other suspension line 1c of the disconnected optical drop cable 1 into the insertion hole at the right end of the suspension line fixing rod 80, By tightening the nut 81 into the thread groove on the right end surface portion of the suspension wire fixing rod 80, the suspension wire 1 c is fastened and fixed by the suspension wire fixing rod 80.

Although not shown, instead of the hanging wire fixing rod 11 to which the first and second left protrusions 11 _L1 and 11 _L2 and the first and second right protrusions 11 _R1 and 11 _R2 shown in FIG. 1 are attached, A hanging wire fixing rod to which at least one left eye metal fitting and at least one right eye metal fitting are attached may be used.
In this case, the operator passes one hanging wire 1c of the disconnected optical drop cable 1 through the left eye fitting and then wraps and fixes the hanging wire 1c of the disconnected optical drop cable 1 to the right eye fitting. After passing, fix by wrapping.

In the above description, as shown in FIG. 1B, the cylindrical cover 13 in which the second through-hole 13c ₂ is formed in the center part of both end faces is used. Using a rectangular parallelepiped cover 91 in which a _second through hole 91c ₂ is formed below the first through hole 91c ₁ on both end faces like a linear connection closure 90 shown in FIGS. 7 (a) and 7 (b). Also good.
In the straight connector closure 90, a body portion of the optical drop cable 1 disconnected is stored in the cover 91 through the second through hole 91c _2.
The lower ends of the front cover 91a and the back cover 91b protrude perpendicularly to the bottom surface and are provided with a plurality of holes. After the bolt 92 is passed through the holes as shown in FIG. By sandwiching the lower ends of the front cover 91a and the rear cover 91b with bolts 92 and nuts 93, the front cover 91a and the rear cover 91b are fixed with the front cover 91a closed.
Further, the suspension wire fixing rod 11, the holder 12, and the cover 91 may be integrated so that the repair work can be performed with the surface cover 91a opened as shown in FIG. As a result, the worker can complete the repair work by closing the surface cover 91a after the disconnected optical drop cable 1 is connected, so that the efficiency of the repair work can be further improved.

  Further, although the straight jumper core wire 2 is used, a curled jumper core wire may be used.

1 'optical drop cable 1 "optical drop cable for connection 1a core wire 1b tension member 1c suspension wire 2 jumper core wires 3 _L , 3 _R left and right sleeves 4 _L , 4 _R left and right mechanical splices 5, 5' media converter 6 Personal computer 7 Connector cable 10, 60, 90, 100 Straight connection closure 11, 70, 80 Suspension wire fixing rod 11 _L1 , 11 _L2 First and second left projection 11 _R1 , 11 _R2 First and second right projection 12,21,31,41,51 holder 12a, 41a, 51a sponge member 13,91 cover 13a, 91a face cover 13b, 91b rear cover _{13c 1, 13c 2, 91c 1} , 91c 2 first and second through-holes 21a, 31a Holding projection 61 Optical drop cable fixing rod 61 _L , 61 _R Left side and Fine right securing metal fitting 61a attached portion 61b body portion gripping portion 61c suspension wire unit gripper 71 fixing screws 81 and 93 the nut 92 volts 100 _1, 100 ₂ first and second linear connecting closure 110 termination box

Claims (9)

A linear connection closure (10; 60; 90) used for repair when the optical drop cable (1) drawn into the subscriber's house from the trunk optical fiber cable is disconnected,
Rod-shaped optical drop cable fixing means (11; 61; 70; 80) for fixing one and the other of the disconnected optical drop cable at both ends,
One and the other core wires (1a) of the disconnected optical drop cable, a jumper core wire (2) connected to the core wire, and a connection portion (3 _L , 3 between the core wire and the jumper core wire) _R ; 4 _L , 4 _R ) holders (12; 21; 31; 41; 51);
An openable / closable cover (13; 91) for storing the optical drop cable fixing means and the holder;
A linear connection closure characterized by comprising: The optical drop cable fixing means has suspension line fixing means (11 _L1 , 11 _L2 , 11 _R1 , 11 _R2 ; 71; 81) for fixing one and the other suspension lines of the disconnected optical drop cable at both ends. 2. A linear connection closure according to claim 1, characterized in that each is a hanging wire fixing rod (11; 70; 80). The optical drop cable fixing means is an optical drop cable fixing rod (61) provided with holding fittings (61 _L , 61 _R ) for holding one and the other of the disconnected optical drop cables respectively at both ends. The linear connection closure according to claim 1, wherein there is a linear connection closure.   Sponge member (12a; 51a) in which a break having a predetermined depth is formed in the holder (12; 51) along the longitudinal direction of the holder from one end surface to the other end surface of the holder or in a strip shape. The linear connection closure according to any one of claims 1 to 3, characterized in that is fitted. The core wire and the jumper core wire are connected using a mechanical splice (4 _L , 4 _R ),
A plurality of holders (21; 31) are attached to two side surfaces so as to face each other, and a holding position is adjusted according to the length of the jumper core wire to hold the mechanical splice. A holding projection (21a; 31a),
The linear connection closure according to claim 1, wherein the linear connection closure is provided.   6. The linear connection closure according to claim 5, wherein the plurality of holding projections (21a) are attached at intervals that can hold the both end faces of the mechanical splice.   6. The linear connection closure according to claim 5, wherein the plurality of holding projections (31a) are attached at intervals that can hold and hold two or more side surfaces of the mechanical splice. The core wire and the jumper core wire are connected using a mechanical splice (4 _L , 4 _R ),
The holder (41) includes a sponge member (41a) for embedding and holding the mechanical splice.
The linear connection closure according to claim 1, wherein the linear connection closure is provided.   The linear connection closure according to any one of claims 1 to 8, wherein the optical drop cable fixing means, the holder, and the cover are integrated.