JP3945758B2 - Optical fiber cable holder for optical connection box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used to hold optical fiber cables such as an optical fiber cable provided with a hard core tension member, an optical fiber cable provided with a soft core tension member, and an optical fiber cord when entering / exiting an optical connection box. The present invention relates to an optical fiber cable holder for an optical connection box.
[0002]
[Prior art]
Conventional optical fiber cable holders for optical connection boxes are usually held by dedicated holders corresponding to the types of optical fiber cables that are input and output. For example, as shown in FIG. 5, an optical fiber cable 101 provided with a hard core tension member that enters and exits the connection box 100 is held and exposed by a cable presser 102 provided at an input / output line opening of the optical connection box 100. Further, the hard core tension member 101a is held by the tension bar clamp 103 provided at the upper part of the optical junction box. Further, the optical fiber cord 105 is fitted into a cord holding packing 107 provided at an entry / exit port, and the cord holding packing 107 is held by a holding metal fitting 106 to allow entry / exit.
[0003]
[Problems to be solved by the invention]
However, since various types of optical fiber cables are used, it is necessary to prepare dedicated holders according to the types of optical fiber cables that come in and out, which increases the number of parts and makes replacement work easier. There was a problem that required time. Therefore, there has been a demand for an optical fiber cable holder for an optical connection box that can handle various optical fiber cables.
[0004]
[Means for Solving the Problems]
The optical fiber cable holder of the optical junction box of the present invention made in response to the above-mentioned long-awaited provision is provided with a clamp frame portion having a holding portion for a hard core tension member detachably provided on the front surface of the clamp body, and the clamp In an optical fiber cable holder of an optical connection box capable of holding an optical fiber cord holding packing between a frame part and the clamp body, an arm in which the clamp frame part is connected to at least one side rear part of a front plate part The mounting piece is bent outside the plate, and the hard core tension member exposed from the cable faces the screw hole provided in the front plate between the clamp body and the clamp frame. a screw hole screwed to a screw of which is characterized in that the Katashin tension member for holding unit by sandwiching the cured core tension member between the front end surface and the clamp body of the screw The invention described in Motomeko 1, in the present invention, the invention according to one provided a holding portion for 軟芯 tension member to the clamp body in claim 2.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be shown.
Reference numeral 1 denotes a clamp main body. The clamp main body 1 is provided with mounting holes 12 for inserting mounting screws into the optical connection box 100 in the horizontally long rectangular base plate 11 at the lower side on both sides and a pair of laterally above the center portion. A pair of screw holes 14, 14 are provided in the horizontal direction below the screw holes 13, 13. Further, screw holes 15 and 15 as one means for detachably providing the clamp frame portion 2 described below are provided in the upper part on both sides of the clamp body 1, and a vertical groove 16 is provided in the center of the front and back surfaces. Yes. Further, a ground terminal portion 17 with a screw hole is stretched on one side upper portion of the clamp body 1.
[0006]
Reference numeral 2 denotes a clamp frame portion that is detachably provided on the front surface of the clamp body 1, and the clamp frame portion 2 is disposed outside the arm plate portions 22, 22 connected to the rear portions on both sides of the front plate portion 21. The attachment pieces 23 and 23 with screw insertion holes 23a facing the screw holes 15 at the upper portions on both sides are formed by bending. In addition, screw holes 24 and 24 facing the vertical groove 16 are provided vertically in the center of the front plate portion 21 as a holding portion for the hard core tension member, and between the clamp frame portion 2 and the clamp body 1. The optical fiber cord holding packing 3 can be held. The clamp frame portion 2 is detachably provided on the front surface of the clamp body 1 by a set screw with the attachment piece portions 23 abutting against the upper portions on both sides of the clamp body 1. The clamp frame 2 is detachably provided on the front surface of the clamp body 1 on the assumption that the width of the front plate 21 is wider than the width of the clamp body 1 and the attachment piece 23 is detachably attached to the optical connection box. It is also possible to use it. Further, the arm plate portion 22 and the attachment piece portion 23 of the clamp frame portion 2 may be provided only on either the left or right side. Furthermore, the shape of the optical fiber cord holding packing is not limited, and for example, it may be a laminate of flat rubber.
[0007]
Since the clamp body 1 has a horizontally long rectangular base plate 11 provided with mounting holes 12 for inserting mounting screws into the optical connection box 100 at the lower sides on both sides, the front and back are reversed. As shown in FIG. 1, the mounting holes are held on the holding step portion 100a of the clamp body 1 provided below the optical connection box 100 at the upper part of the incoming and outgoing openings provided on the lower left and right sides of the optical connection box 100, respectively. 12, the mounting screw 50 is inserted and then screwed into the screw hole provided in the optical connection box 100 for mounting. And according to the kind of optical fiber cable hold | maintained at this, the clamp frame part 2 provided in the front surface of the clamp main body 1 detachably is used, or an optical fiber cable is hold | maintained without using it.
[0008]
That is, when the optical fiber cable 41 provided with the hard core tension member is input / output, the optical fiber cable 41 provided with the hard core tension member can be firmly held only by holding the hard core tension member 41a. As shown in the lower left part of FIG. 2, a hard core tension member 41a exposed from the cable is provided between the clamp main body 1 and the clamp frame portion 2 at the center of the front plate portion 21 in the vertical direction, 24, the screw 51 is screwed into the screw hole 24, and is sandwiched between the tip surface of the screw 51 and the clamp body 1 to hold the hard core tension member 41a. In this case, if the vertical groove 16 is provided in the center of the front and back surfaces of the clamp body 1 and the screw holes 24 and 24 face this, the positioning of the hard core tension member 41a is easy and can be firmly held. Is.
[0009]
When the vinyl-coated optical fiber cord 42 coated with vinyl is coated around the optical fiber core wire, the clamp frame 2 can hold the optical fiber cord holding packing 3, so that FIG. As shown below, each cord is fitted into the holding groove 3a of the optical fiber cord holding packing 3, and the optical fiber cord holding packing 3 is attached to the clamp body 1 and the clamp frame portion 2 is attached. The coated optical fiber cord 42 is firmly held at the input / output line location.
[0010]
In addition, when the optical fiber cord 43 covered with vinyl after covering the periphery of the optical fiber core wire with the tensile fiber which is a soft core tension member and entering and exiting the optical fiber cord 43, the tensile fiber 43a is connected as shown in FIG. A pair of screw holes 13, 13 that are divided into two parts and wound around the necks of two screws 53, 53 apart from the core wire 43 b and provided above the central part of the clamp body 1. The tensile strength fiber optic fiber cord 43 is clamped between the head 53a of the screw 53 and the clamp body 1 and is firmly held at the entry / exit portion. In this case, if the head 53a of the screw 53 has a large diameter, the tensile fiber 43a is more accurately sandwiched between the head 53a and the clamp body 1, and the screw holes 13 and 13 are formed in the clamp body. Since the large-diameter head 53a does not hit the holding step portion 100a of the clamp body 1 provided below the optical connection box 100, it can be screwed accurately. is there.
[0011]
Further, when a so-called drop cable 44 having a vinyl tension member in which a thin wire is coated with vinyl on the side of the optical fiber core coated with vinyl is used as a soft core tension member, as shown in FIG. The two vinyl tension members 44a and 44a are separated from the core wire 44b, and the two screws 54 and 54 are fitted with a peripheral-corner washer fitting 54a with a back surface serration, and below the center portion of the clamp body 1. Are screwed into a pair of screw holes 14, 14 and sandwiched between the washer fitting 54 a and the clamp body 1 and firmly held at the entry / exit line location. In this case, since the screw holes 14 are provided below the center portion of the clamp body 1, the peripheral square washer fitting 44 a is a holding step portion 100 a of the clamp body 1 provided below the optical connection box 100. Therefore, the vinyl tension member 44a is not wound and the core wire 44b is not damaged. When the drop cable 44 and the tensile strength fiber optical fiber cord 43 are held, the clamp frame 2 is not necessary, but it is possible to cope with a change to an optical fiber cable or the like provided with a hard core tension member. The clamp frame 2 is preferably attached after the drop cable 44 and the tensile fiber optical fiber cord 43 are held.
[0012]
【The invention's effect】
As described above, the optical fiber cable holder of the optical junction box of the present invention is provided with the clamp frame portion having the holding portion for the hard core tension member detachably provided on the front surface of the clamp body, Since the optical fiber cord holding packing can be held between the clamp body and the optical fiber cable, it can be held accurately when entering and exiting various optical fiber cables. Not only can it be reduced, but it can easily accommodate changes in optical fiber cables.
Further, by providing a soft core tension member holding portion in the clamp body, the types of optical fiber cables that can be held can be further increased.
Therefore, the present invention solves the problems of the conventional optical fiber cable holder for the optical junction box, and is a great advantage for the industry.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing an embodiment of the present invention with different aspects.
FIG. 3 is a perspective view of a main part showing an embodiment of the present invention with different aspects.
FIG. 4 is a perspective view of a main part showing an embodiment of the present invention with different aspects.
FIG. 5 is a perspective view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clamp body, 11 Base plate, 12 Mounting hole, 13 Screw hole, 14 Screw hole, 2 Clamp frame part, 21 Front plate part, 24 Screw hole, 3 Optical fiber cord holding packing, 100 Optical connection box

Claims (2)

An optical junction box that is provided with a clamp frame portion having a holding portion for a hard core tension member in a detachable manner on the front surface of the clamp body, and capable of holding an optical fiber cord holding packing between the clamp frame portion and the clamp body. In the optical fiber cable holder, the clamp frame portion is formed by bending a mounting piece on the outer side of the arm plate portion provided continuously with the rear portion of at least one side of the front plate portion, and the hard core tension exposed from the cable A member is made to face a screw hole provided in the front plate portion between the clamp main body and the clamp frame portion, and a screw is screwed into the screw hole so that the hard core is interposed between the tip end surface of the screw and the clamp main body. An optical fiber cable holder for an optical connection box, wherein a holding member for a hard core tension member is formed by sandwiching a tension member. 2. The optical fiber cable holder for an optical connection box according to claim 1, wherein a holding part for a soft core tension member is provided in the clamp body.

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