JPS6239361Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an input/output line holding device for an optical cable drop box.

(Prior Art) An optical cable drop box requires a retainer for retaining the optical fiber cord of the optical cable and a retainer for retaining the optical fiber outdoor line for withdrawal to the subscriber. Conventionally, the optical fiber cord and the optical fiber outdoor wire have different cross-sectional shapes, such as the former having a round cross-section and the latter having a gourd-shaped cross-section, so two types of fasteners are required, which has the disadvantage of increasing costs. It was hot.

(Purpose of the invention) An object of the invention is to provide an input/output line holder for an optical cable drop-off box that can hold both the optical fiber cord and the optical outdoor line.

(Structure of the invention) The inlet/output wire anchoring device for an optical cable drop-off box according to the present invention is composed of a retaining base and a holding cover placed on the retaining base and fixed with screws. Cord gripping grooves that cross the direction are provided at predetermined intervals in the longitudinal direction, and a tension member through hole passes through each groove portion between adjacent cord gripping grooves of the retaining base in a direction parallel to the grooves. and a threaded hole is provided in each of the groove portions in a direction perpendicular to each tension member through hole, corresponding to each of the tension member through holes,
Tension member fixing screws are screwed into the screw holes, and cord holding projections are provided on the lower surface of the holding lid to fit into the respective cord holding grooves and press and hold the optical fiber cords. It is characterized by this.

(Embodiment) An embodiment of an input/output cable hold-down tool 1 for an optical cable drop box according to the present invention will be described below with reference to the drawings. As shown in Fig. 1, this input/output cable hold-down tool 1 comprises a hold-down base 2 and a cover 4 placed on top of it and fixed with screws 3. Cord gripping grooves 5 are provided at regular intervals in the longitudinal direction on the upper surface of the hold-down base 2, running across its width. Furthermore, tension member through-holes 7 are provided in each groove portion 6 between adjacent cord gripping grooves 5 of the hold-down base 2, passing through the grooves in a direction parallel to the grooves 5.
Further, in each groove portion 6, a screw hole 8 is provided in a direction perpendicular to each tension member through hole 7.
A tension member fixing screw 9 is screwed into each of these screw holes 8. On the underside of the cover 4, there are provided cord pressing protrusions 10 which fit into the cord gripping grooves 5 to press and hold the optical fiber cords. The lower ends of these protrusions 10 are provided with a cushioning material 11 such as urethane foam.
The width of the pressing cover 4 is 1/2 the width d of the retaining base 2.
, so that the screw hole 8 is not blocked by the pressing lid 4.

2 to 4 show an example of an optical cable drop-off box 12 to which the input/output line fastener 1 of the present invention is attached. In this withdrawal box 12, notches 14 are provided in left and right portions of one side wall of the box body 13, respectively. Rubber bushing blocks 15 are respectively fitted into these notches 14 and fixed with screws 16. The bushing lock 15 is provided with thin portions 17 at regular intervals corresponding to portions through which input and output wires are passed. A base plate 18 is fixed in the middle of the box body 13 in the thickness direction, and each butting block 15 is mounted on this base plate 18.
Correspondingly, the input/output line fastener 1 of the present invention is fixed with a mounting screw 19.

Next, an example of securing an optical cord of an optical cable to such an input/output line retaining device 1 will be described. FIGS. 5 and 6 show an example of how the pipe-shaped optical fiber cord 20 is held. The pipe-type optical fiber cord 20 has a nylon-coated optical fiber core 22 freely placed inside a pipe 21 made of polyethylene or the like.
It has a structure that accommodates. When securing such a pipe-shaped optical fiber cord 20, the thin wall portion 17 of the butting block 15 is broken and the optical fiber cord 20 is pulled into the drawer box 12, and the tip of the pipe 21 of the optical fiber cord 20 is pulled into the box 12. within the department
Insert the inner pipe 23 made of metal such as SUS,
Pass the tip of the pipe 21 into the cord gripping groove 5 of the retaining base 2 without crushing it, cover it with the presser lid 4, press the optical fiber cord 20 with the cord presser protrusion 10 via the cushioning material 11, and pull it. stop.
At this time, even if you press down strongly, the optical fiber core 22
Due to the presence of the inner pipe 23, no side pressure is applied.

7 and 8 show an example in which a solid optical fiber cord 24 is held. The solid optical fiber cord 24 has a structure in which the outer periphery of a nylon-coated optical fiber core 22 is covered with a tension member 25 made of polyamide fiber, and the outer periphery is covered with a cord coating 26 made of polyethylene or the like. . When securing such an optical fiber cord 24, the cord coating 26 is peeled off at the tip of the optical fiber cord 24 pulled into the withdrawal box 12 in the same manner, and the tension member 25 and the optical fiber core wire 22 are removed. The exposed end of the optical fiber cord 24 with the cord coating 26 is passed through the cord gripping groove 5 of the retaining base 2, the presser cover 4 is covered, and the cord presser protrusion 10 is used to hold the optical fiber cord 20 through the cushioning material 11. to hold down and hold back. Further, the tension member 25 is held in place by wrapping it around the outer periphery of the tension member fixing screw 9 and tightening it by applying a frictional force with a corrugated washer 27.

FIG. 9 shows an example of the optical outdoor line 28. This outdoor optical line 28 has a structure in which a tension member 29 such as a piano wire and an optical fiber core 30 such as a nylon coating are arranged side by side and integrated with a common coating 31. To hold such an outdoor optical wire 28, the coating 31 is peeled off to expose the tension member 29 and the optical fiber core 30, and the optical fiber core 30 is passed through the cord gripping groove 5 of the retaining base 2. As mentioned above, the cord presser protrusion 1 of the presser cover 4
0, the tension member 29 is passed through the tension member through hole 7, and the tension member fixing screw 9 is pressed to hold the tension member 29 in place.

The optical fiber core 22 of the pipe-type optical fiber cord 20 or the optical fiber core 22 of the solid optical fiber cord 24 and the optical fiber core 30 of the optical outdoor line 28 are connected within the withdrawal box 12, The optical outdoor line 28 is used to wire the subscriber's home.

(Effects of the invention) As explained above, the input/output wire tensioning device for an optical cable drop-off box according to the present invention is provided with a cord gripping groove and a tension member through hole in the tensioning base, and the optical fiber cord in the cord gripping groove is The optical fiber core wire is held in place by being held down by the cord holding projection on the holding cover, and the tension member passed through the tension member through hole is held down and held in place by the tension member fixing screw screwed into the holding base. Both optical fiber cords and optical outdoor lines can be tied down, and there is no need to use two types of dedicated tie-down devices, and the required number of the same tie-down devices can be used for the tie-down.
Cost reduction can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the retainer according to the present invention, Fig. 2 is a plan view of essential parts of an example of a withdrawal box using the retainer of the present invention, and Fig. 3 is the same as in Fig. 2. A-A
4 is a sectional view taken along the line B-B in FIG. 2, FIGS. 5 and 7 are perspective views showing examples of two types of optical fiber cords to be secured, and FIGS. 6 and 8. FIG. 9 is a cross-sectional view showing the retained state of the optical fiber cord shown in FIGS. 5 and 7, and FIG. 9 is a perspective view showing an example of the optical outdoor line. 1... Attachment tool, 2... Attachment base, 3... Screw,
4... Presser cover, 5... Cord gripping groove, 6... Part between grooves, 7... Tension member through hole, 8...
Screw hole, 9...Tension member fixing screw, 1
0... Cord holding protrusion, 11... Cushioning material, 12...
...Debit box, 13...Box body, 15...Butching block, 20...Pipe type optical fiber cord, 21...Pipe, 22...Optical fiber core wire,
23... Inner pipe, 24... Solid optical fiber cord, 25... Tension member, 26
... Cord coating, 28 ... Optical outdoor line, 29 ... Tension member, 30 ... Optical fiber core wire, 3
1...Coating.

Claims (1)

[Scope of utility model registration request] It consists of a retaining base and a presser cover placed on the retaining base and fixed with a screw, and the upper surface of the retaining base is provided with cord gripping grooves extending in the width direction at predetermined intervals in the longitudinal direction. A tension member through hole is provided in each groove portion between adjacent cord gripping grooves in a direction parallel to the groove, and a tension member through hole is provided in each groove portion. Screw holes are provided in a direction orthogonal to the holes, respectively, tension member fixing screws are screwed into the screw holes, and tension member fixing screws are screwed into the screw holes, and tension member fixing screws are screwed into the lower surface of the presser cover to fit into the respective cord gripping grooves. An inlet/output wire drawer for an optical cable drop-off box, characterized in that each cord holding protrusion for holding down an optical fiber cord, etc. is protruded.