JP5344703B2 - Cable fixing device and optical cable fixing method using the same - Google Patents

Description

  The present invention relates to a cable fixing device and an optical cable fixing method using the same.

  Conventionally, as a device for fixing various cables such as optical fibers, a cable drawing device having a pedestal on which a cable is mounted, a pressing metal for pressing the cable on the pedestal, and a screw for fastening the pressing metal to the pedestal is known. ing.

  The pedestal is fixed in advance to the cable inlet of the connection box. Further, the presser fitting is formed by bending a metal plate so that a tightened portion facing the pedestal is formed in the middle portion in the cable axial direction and a cable straddling portion is formed on both ends.

  Further, the bending angle between the tightened portion and the cable straddling portion is a right angle or is slightly larger than the right angle. In addition, a notch portion into which the cable enters is formed in the cable straddling portion. The shape of the notch may be a reverse U-shape in which the opening side is a straight line parallel to the back and a semicircular shape at the back, or a tapered shape with the opening narrowing toward the back. .

  In order to hold the cable with such a tensioning device, the screw is first loosened, and then the cable is inserted into the hole formed by the notch portion of the pressing metal and the base, and then the bolt is tightened.

  In addition, the part that is pressed against the cable sheath of the presser bracket is formed obliquely with respect to the cable axis, and it is proposed that the presser bracket will bite into the cable jacket when the cable moves in the axial direction. Has been. With such a biting structure, the cable can be more reliably retained, and the reliability as the cable retaining device can be improved.

  In addition, by making the part pressed against the cable sheath of the holding bracket into a substantially C shape, it becomes possible to hold cables of various outer diameters, and to increase flexibility with respect to changes in the cable outer diameter A drawing device has been proposed.

  The conventional cable drawing apparatus described above is described in, for example, Patent Document 1 below.

JP 2001-157345 A

  In the conventional cable drawing device, since the cable is always firmly tightened with the pressing metal, there is a concern that the cable is distorted and various characteristics such as its optical characteristics are deteriorated. On the other hand, if the tightening of the cable is eased, the cable can easily slip through the holding fitting when the cable is pulled, and the cable cannot be sufficiently fixed.

  The present invention has been made in view of the above-described problems, and provides a cable fixing device capable of fixing a cable more reliably with a simple structure without deteriorating characteristics and the like, and an optical cable fixing method using the same. The purpose is to do.

  The cable fixing device according to the present invention has a substantially rhombus outer shape, a cable stopper piece for loosely fitting the cable to a diagonal line of the approximately rhombus, a cable stopper piece, and a cable stopper when the cable is pulled. A pedestal that presses a pair of sides on the pulled side of the cable stopper piece so that the piece press-clamps the cable is provided.

  In addition, the cable fixing device according to the present invention preferably corresponds to the strength of the pulling force of the cable so that the force with which the cable stopper piece presses the cable fluctuates corresponding to the strength of the pulling force of the cable. The force with which the base presses the cable stopper piece varies.

  In the cable fixing device according to the present invention, more preferably, the diagonal line of the cable stopper piece for loosely fitting the cable is a diagonal line in the longitudinal direction, and when the cable is pulled, the cable stopper piece is pulled together with the cable. By moving in the direction, the pair of sides of the cable stopper piece is pressed from the inner wall of the fixed base.

  Further, in the cable fixing device according to the present invention, more preferably, the pedestal includes an inner wall of interest in the cable direction so that the cable stopper piece clamps and holds the cable even when the cable is pulled in any direction. It is characterized by.

  The cable fixing device according to the present invention is more preferably characterized in that the base does not press the cable stopper piece in a natural state.

  The cable fixing device according to the present invention is more preferably characterized in that the press-contacting and clamping surface of the cable stopper piece that press-clamps the cable when the cable is pulled has a sawtooth shape.

  Further, in the cable fixing device according to the present invention, the inner wall of the pedestal is more preferably curved in a convex shape, and when the cable is pulled, the pair of sides of the cable fastening piece are respectively pointed with the inner wall of the pedestal or It is characterized by being pressed by contact with a wire.

  In the cable fixing device according to the present invention, it is more preferable that the curved inner wall of the pedestal has a pair of press-contact clamping surfaces of the cable stopper piece that press-clamps the cable even when the strength of the pulling force of the cable varies. A desired portion of the cable stopper piece is pressed so as to be in a state.

  Further, in the cable fixing device according to the present invention, it is more preferable that the cable stopper piece includes four straight frames constituting each side of the substantially rhombus in a plan view, and a central frame positioned on a diagonal line perpendicular to the cable. It is characterized by having a frame shape.

  In the cable fixing device according to the present invention, more preferably, the central frame includes a notch groove in which the cable is disposed.

  The cable fixing device according to the present invention is further characterized in that the notch groove is formed of an elastic material so as to correspond to cables of different diameters.

  The cable fixing device according to the present invention is more preferably characterized in that the elastic material is a silicone resin.

  The cable fixing device according to the present invention is further characterized in that the notch groove is formed in a tapered shape so as to correspond to cables having different diameters.

  The cable fixing device according to the present invention is more preferably characterized in that the cable stopper piece is formed of a synthetic resin.

  Moreover, the G-PON apparatus concerning this invention is provided with the cable fixing apparatus in any one of the above-mentioned.

  The optical cable fixing method according to the present invention includes a step of loosely fitting the optical cable to the cable stopper piece and a step of arranging the cable stopper piece on the base.

  According to the present invention, it is possible to realize a cable fixing device that can fix a cable more reliably with a simple structure without deteriorating optical characteristics and the like, an optical cable fixing method using the same, and the like.

(A) is a top view explaining a cable fixing device, (b) is a left side view explaining a cable fixing device, (c) is a right side view explaining a cable fixing device, (d) These are front views explaining a cable fixing device. It is a figure explaining the cable fixing device in the case of applying with respect to a cable with a comparatively large diameter. It is a figure explaining the cable fixing device in the case of applying with respect to a cable with a comparatively thin diameter. It is a perspective view explaining the structure outline of a cable stop piece. It is a conceptual diagram explaining a cable stop piece. It is a schematic diagram explaining the press-contact clamping surface of a cable stop piece. It is a perspective view explaining a base. (A) is a plan view for explaining the pedestal, (b) is a left side view for explaining the pedestal, (c) is a right side view for explaining the pedestal, and (d) is a front view for explaining the pedestal. FIG. It is explanatory drawing which illustrates the variation of the cable stop piece concerning 2nd embodiment. It is a perspective view explaining notionally the G-PON apparatus concerning 3rd embodiment. It is a top view which illustrates notionally the state which removed the cover of the G-PON apparatus concerning 3rd embodiment.

  The cable fixing device described in this embodiment includes a cable stopper piece that gently holds a cable in a natural state, and a base that holds the cable stopper piece. When the cable is pulled, the pedestal presses the cable stopper piece, and the pressed cable stopper piece pinches the cable more strongly and fixes the cable so that it does not come out in the pulling direction.

  The cable stopper piece has a substantially rhombus frame shape in plan view, and is discontinuous at two diagonals (preferably acute angles) located at the end points of diagonal lines (preferably in the longitudinal direction). In addition, a central frame is provided so as to connect two diagonals (preferably obtuse angles) located at end points of the other diagonal line (preferably in the short direction).

  Moreover, a cable stop piece arrange | positions a cable on a diagonal line (preferably longitudinal direction). That is, the cable is loosely fitted so as to divide the acute angle between two edge portions of the cable fastening piece that preferably forms an acute angle. For this reason, the two sides that preferably form an acute angle are discontinuous at the edge.

  The pedestal has four inner walls that are held inward so as to be fitted with the cable stopper pieces and curved in a convex shape that can be pressed at desired positions on each of the four sides of the rhombus cable stopper pieces. And when the cable is pulled, the convexly curved inner wall presses the two sides of the cable stop piece on the pulled side from the outside to the inside.

  Thereby, the cable loosely fitted between the two pressed sides of the cable stopper piece is more strongly pressed and clamped, and is fixed so as not to be pulled out. The cable fixing device exemplified in the embodiment does not cause excessive tightening to the cable in a natural state, and press-clamps the cable in accordance with the pulling force when the cable is pulled.

  For this reason, the cable fixing device exemplified in the embodiment reduces the concern that the cable is distorted or bent, improves the transmission quality of light, electricity, etc. without causing deterioration of the cable characteristics, Durability can be improved.

(First embodiment)
FIG. 1 is a conceptual diagram illustrating a cable fixing device 1000 according to the first embodiment. 1A is a plan view illustrating the cable fixing device 1000, FIG. 1B is a left side view illustrating the cable fixing device 1000, and FIG. 1C illustrates the cable fixing device 1000. FIG. 1D is a right side view, and FIG. 1D is a front view illustrating the cable fixing device 1000. Since the rear view of the cable fixing device 1000 is the same as the front view, the description is omitted. Further, the left side view and the right side view are described in the direction corresponding to the plan view.

  As shown in FIG. 1, the cable fixing device 1000 includes a substantially diamond-shaped cable stopper piece 100 in a plan view, a base 200 that holds the cable stopper piece 100 inside, and a lid 400 of the base 200. The lid 400 is fixed to the base 200 with a fastening member 410 such as a screw.

  Although the cable fixing device 1000 including the lid 400 is shown in FIG. 1, the pedestal 200 may be provided with a pressing pin (not shown) that holds the cable stopper piece 100 so that the cable stopper piece 100 does not pop out, instead of the lid 400. The lid 400 may not be provided. The cable fixing device 1000 may be formed of a synthetic resin or the like that is relatively light and has high strength.

  In FIG. 1, the cable 300 is disposed so as to be sandwiched loosely, preferably on the longitudinal diagonal of the cable stopper piece 100. In such a natural state, the cable 300 is not applied with a press-contact holding force that resists the pulling force in the axial direction, and the cable is not substantially deformed or bent.

  In addition, in FIG. 1, the example in which the cable 300 is disposed on the longitudinal diagonal of the cable stopper piece 100 is shown, but the present invention is not limited to this. It is good also as a structure arrange | positioned on a hand diagonal. It is more preferable that the cable 300 is disposed on the longitudinal diagonal of the cable stopper piece 100 because the holding and fixing function of the cable 300 is smoothly exhibited.

  FIG. 2 is a diagram for explaining a cable fixing device 1000 when a cable 300 having a relatively large diameter is provided. As can be understood from FIG. 2, the distance between the pair of sides sandwiching the cable 300 of the cable stopper piece 100 is slightly widened corresponding to the cable 300 having a relatively large diameter, and the cable stopper piece 100 loosely fits the cable 300. . The base 200 is provided with a fastening hole 420 corresponding to the fastening member 410.

  FIG. 3 is a diagram for explaining a cable fixing device 1000 when a cable 300 having a relatively small diameter is provided. As can be understood from FIG. 3, the distance between the pair of sides sandwiching the cable 300 of the cable stopper piece 100 is slightly narrowed corresponding to the cable 300 having a relatively small diameter, and the cable stopper piece 100 loosely fits the cable 300. . In FIG. 2 and FIG. 3, the parts corresponding to those in FIG.

  Next, the cable stopper piece 100 will be described in detail with reference to FIGS. FIG. 4 is a perspective view illustrating an outline of the structure of the cable stopper piece 100. 4A is a perspective view illustrating the cable stopper piece 100 in a state where the cable 300 is not provided, and FIG. 4B is a perspective view illustrating the cable stopper piece 100 in a state where the cable 300 is provided. is there.

  FIG. 5 is a conceptual diagram illustrating the cable stopper piece 100. FIG. 6 is a schematic diagram for explaining the press-contacting and clamping surface 115 of the cable stopper piece 100. 4 to 6, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 4, the cable fastening piece 100 has four sides 110 (1), 110 (2), 110 (3), and 110 (4) that form a substantially rhombus (hereinafter collectively referred to as the four sides 110 as appropriate). And a central frame 120 positioned diagonally in a direction perpendicular to the cable 300.

  By using the frame-shaped cable stopper piece 100 having many space portions as shown in FIG. 4, the cable fixing device 1000 having excellent heat dissipation characteristics can be obtained. That is, even when the cable fixing device 1000 is used in an electronic device or the like in which a plurality of other electronic components such as a circuit board are provided, the flow of cooling air can be secured by the gap of the cable fixing device 1000. Does not obstruct heat dissipation of parts.

  Further, the four sides 110 are formed discontinuously corresponding to the arrangement positions of the cables 300. That is, in FIG. 4, the side 110 (1) and the side 110 (2) are discontinuous, and the side 110 (3) and the side 110 (4) are discontinuous. In addition, each end face of the four sides 110 that are discontinuous is provided with a press-clamping face 115 that can come into contact with the cable 300 with a predetermined area.

  In addition, as shown in detail in FIG. 6, the press-clamping surface 115 (1) of the side 110 (1) to which the cable 300 is loosely fitted has a sawtooth shape so as to prevent slipping with the cable 300. It is preferable. Similarly, it is preferable that the press-clamping surface 115 (3) of the side 110 (3) to which the cable 300 is loosely fitted also has a sawtooth shape so as to prevent slipping with the cable 300. In addition, in FIG. 6, it is preferable that the press-clamping surfaces 115 (2) and 115 (4) of the sides 110 (2) and 110 (4) also have a sawtooth shape.

  The cable 300 is pulled by making each press-clamping surface 115 (1), 115 (2), 115 (3), 115 (4) (collectively referred to as the press-clamping surface 115 as appropriate) of the four sides 110 into a sawtooth shape. In this case, the holding and fixing force can be further increased. On the other hand, a notch groove 125 in which the cable 300 is disposed is provided at a substantially central portion of the center frame 120.

  The inner wall of the notch groove 125 may be formed of a flexible elastic material typically made of silicone rubber so as to be compatible with cables 300 of various thicknesses. If the inner wall of the notch groove 125 is formed of a flexible elastic material, the groove diameter can be increased with a relatively small force corresponding to the thickness of the cable 300, which is preferable without unnecessarily pressing the cable 300. . Moreover, the notch groove 125 is good also as a mortar-shaped taper shape whose diameter becomes thin according to the depth.

  In any case, the notch groove 125 of the central frame 120 is sufficient if the cable 300 can be disposed relatively loosely and easily, and it is not preferable to press the cable 300 unnecessarily or excessively. That is, the notch groove 125 does not need to apply a force to the cable 300 to hold it against the cable 300 when the cable 300 is pulled.

  As a typical example in which the cable 300 is relatively loosely disposed, for example, when the cable 300 disposed in the notch groove 125 is moved in the axial direction, the cable stopper piece 100 in the natural state moves in the axial direction together with the cable 300. It can be said that the degree is sufficient.

  Further, in a natural state in which the cable 300 is disposed on the cable stopper piece 100, each press contact clamping surface 115 of the four sides 110 holds the cable 300 loosely, and when the cable 300 is moved in the axial direction, the cable stopper piece 100 is connected to the cable 300. In addition, the cutout groove 125 may only guide the arrangement of the cable 300 if it moves only in the axial direction.

  In other words, in the natural state in which the cable 300 is disposed on the cable stopper piece 100, the cable 300 and the cable stopper piece 100 have a relationship that the cable stopper piece 100 moves together in accordance with the axial movement of the cable 300. It is sufficient to have a joint relationship between them, and it is not necessary to have a further fixed holding relationship in the natural state.

  When the cable 300 is pulled in the left direction in FIG. 6, for example, the sides 110 (1) and 110 (2) are pressed from the inner wall of the pedestal 200, and the pressure-clamping surface 115 (1) and the pressure-clamping surface 115 (2) press-clamps the cable 300 with a force corresponding to the pressing force.

  In this case, for example, when the cable 300 is pulled with a relatively strong force, the sides 110 (1) and 110 (2) are pressed from the inner wall of the pedestal 200 with a relatively strong force, and the press-contacting clamping surface 115 ( 1) and the press-clamping surface 115 (2) press-clamp the cable 300 with a relatively strong force.

  Further, when the cable 300 is pulled with a relatively weak force, the sides 110 (1) and 110 (2) are pressed with a relatively weak force from the inner wall of the pedestal 200, so that the pressure contact clamping surface 115 (1) and The press-clamping surface 115 (2) press-clamps the cable 300 with a relatively weak force.

  On the other hand, when the cable 300 is pulled to the right in FIG. 6, for example, the sides 110 (3) and 110 (4) are pressed from the inner wall of the pedestal 200, and the pressure-clamping surface 115 (3) and the pressure-clamping surface 115 (4) press-clamps the cable 300 with a force corresponding to the pressing force.

  In this case, for example, when the cable 300 is pulled with a relatively strong force, the sides 110 (3) and 110 (4) are pressed with a relatively strong force from the inner wall of the pedestal 200, and the press-contacting clamping surface 115 ( 3) and the press-clamping surface 115 (4) press-clamp the cable 300 with a relatively strong force.

  In addition, when the cable 300 is pulled with a relatively weak force, the sides 110 (3) and 110 (4) are pressed with a relatively weak force from the inner wall of the pedestal 200, and the pressure-clamping holding surface 115 (3) The press-clamping surface 115 (4) press-clamps the cable 300 with a relatively weak force.

  In the natural state in which the cable 300 is not pulled, each press-contact clamping surface 115 does not apply any substantial fixing and holding force against the pulling force to the cable 300.

  Further, in a natural state where the cable 300 is not pulled, the cable stopper piece 100 starts to be pressed from the inner wall 200 of the pedestal, and the press-contact clamping surface 115 can increase the press-contact clamping of the cable 300 and start fixing the cable 300. It is preferable to have a certain degree of engagement between the cable stopper piece 100 and the cable 300.

  In a natural state where the cable 300 is not pulled, if the engagement relationship between the cable stopper piece 100 and the cable 300 is too weak, the cable stopper piece 100 is pressed from the inner wall of the base 200 to the extent that the cable 300 can be fixed and held. There is a concern that the cable 300 may be pulled out before being done.

  Therefore, in a natural state where the cable 300 is not pulled, the engagement relationship between the cable stopper piece 100 and the cable 300 is such that the cable stopper piece 100 starts to be pressed from the inner wall of the base 200 to the extent that the cable 300 is not pulled out. To the extent possible.

  In a state where the cable stopper piece 100 is sufficiently pressed from the inner wall of the base 200, the pressure contact clamping surface 115 sufficiently presses and clamps the cable 300, so that the cable stop piece 100 and the cable 300 are in a natural state. It is considered that the engagement relationship is substantially negligible.

  Thus, when the cable 300 is pulled, the cable fixing device 1000 gives the cable 300 a necessary fixing holding force corresponding to the pulling force, and does not give unnecessary tightening or the like to the cable 300 in the natural state. Therefore, the transmission quality of the cable 300 is improved and the durability is also improved.

  FIG. 7 is a perspective view illustrating the pedestal 200. FIG. 8 is a conceptual diagram illustrating the pedestal 200. 8A is a plan view for explaining the pedestal, FIG. 8B is a left side view for explaining the pedestal, FIG. 8C is a right side view for explaining the pedestal, and FIG. d) is a front view illustrating a pedestal. 7 and 8, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals. Further, the rear view is the same as the front view, and therefore the description is omitted.

  As shown in FIG. 7 and FIG. 8, the pedestal 200 includes a space 280 in which the cable stopper piece 100 is disposed in the central portion thereof. The space 280 includes four inner walls 210 (1), 210 (2), 210 (3), and 210 (4) (hereinafter collectively referred to as the inner wall 210 as appropriate) curved in a convex shape. Thereby, when the cable 300 is pulled, the inner wall 210 and the four sides 110 of the cable stopper piece 100 come into contact with each other at points or lines.

  Each inner wall 210 is formed corresponding to each of the four sides 110, and when the cable 300 is pulled, it presses two of the four sides 110 corresponding to the pulling direction. Further, the inner wall 210 (1) and the inner wall 210 (2) are narrowed at the entrance and exit of the cable 300 to such an extent that the cable stopper piece 100 is not pulled out from the base 200. Similarly, the inner wall 210 (3) and the inner wall 210 (4) are narrowed at the entrance / exit of the cable 300 to such an extent that the cable stopper piece 100 is not pulled out from the base 200.

  By appropriately adjusting the curved shapes of the four inner walls 210 that are curved in a convex shape, it is possible to adjust the pressed location on the four sides 110. In addition, regardless of the force with which the four sides 110 are pressed, preferably the cable 300 is pulled, a pair of opposing pressure-clamping surfaces 115 (pressure-clamping surface 115 (1) and pressure-clamping surface 115 (2), or pressure-clamping surface 115 The curved shape of the inner wall 210 is appropriately adjusted so that (3) and the press-clamping surface 115 (4) are parallel to each other.

  As a result, it is possible to suppress a large fixed holding stress from being locally applied to the cable 300, and to fix the holding force of the cable 300 having a certain area in a relatively wide range corresponding to the press-contacting clamping surface 115. Will be added. Therefore, local damage to the cable 300 can be suppressed, and the concern about deterioration of characteristics can be reduced.

  In addition, when a strong pulling force is applied to the cable 300, the pressing force applied to the corresponding pair of two sides of the four sides 110 is increased, so that the cable stopper piece 100 may be slightly deformed. . Even in such a case, an appropriate pressing force is applied to an appropriate portion of the four sides 110 of the cable fastening piece 100 in an appropriate direction by the four inner walls 210 curved in a convex shape. The cable fixing device 1000 can be fixed and held on the cable.

  In this way, regardless of the strength of the pulling force of the cable 300, if the pair of opposing pressure contact clamping surfaces 115 are parallel to each other, the cable 300 is fixed on the entire pressure contact clamping surfaces 115, and thus stronger. This is preferable because it can be fixedly held and local damage and deterioration of the cable 300 can be reduced.

  In addition, about the suitable press location with respect to the four sides 110, you may adjust suitably by adjusting the curved shape of the inner wall 210 suitably according to the intensity | strength and shape of the material of the cable stop piece 100, a bending deformation condition, etc. .

  The cable fixing device 1000 can be typically used for preventing the optical cable from being pulled out. In a natural state, the cable fixing device 1000 does not deteriorate the light transmission quality and does not damage the outer cover of the optical cable. Provides a state of preventing sexual withdrawal. Further, the cable fixing device 1000 can give the optical cable a fixed holding force necessary to prevent the optical cable from being pulled out only when some tensile force is applied to the optical cable.

(Second embodiment)
FIG. 9 is an explanatory view illustrating variations of the cable stopper pieces 8100 and 9100 according to the second embodiment. In the cable stop pieces 8100 and 9100 shown in FIG. 9, the same base 200 as that of the first embodiment can be used.

  In FIG. 9A, the cable stop piece 8100 has sides 8110 (1), 8110 (2), 8110 (3), and 8110 (4) formed in a plate shape. Thereby, since the strength of the cable stopper piece 8100 increases, even when pressed from the pedestal 200, it is preferable because the cable 300 can be securely and firmly fixed with little bending.

  Also, in FIG. 9B, the cable stop piece 9100 has side 9110 (1), side 9110 (2), side 9110 (3), and side 9110 (4) each formed in a hollow plate shape. Yes. As a result, since the cable stopper piece 9100 can achieve both an increase in strength and an improvement in heat dissipation characteristics at a high level, even when pressed from the base 200, the cable 300 can be securely and firmly fixed with little bending, This is preferable because the heat dissipation of electronic equipment can be kept high.

  Since the other points are the same as those in the first embodiment described above, the description is omitted here in order to avoid duplication.

(Third embodiment)
FIG. 10 is a perspective view conceptually illustrating the G-PON apparatus 2000 according to the third embodiment. FIG. 11 is a plan view conceptually illustrating a state where the cover 2400 of the G-PON apparatus 2000 according to the third embodiment is removed.

  10 and 11, the G-PON apparatus 2000 includes a main body 2200 and a cover 2400. The G-PON device 2000 includes the cable fixing device 1000 described in each embodiment described above. FIG. 11 shows an external power cable 2300.

  As shown in FIGS. 10 and 11, the G-PON device 2000 that mediates electrical signals and optical signals is mounted with a large number of other electronic components and the like at high density. For this reason, it is preferable that the cable fixing device 1000 mounted on the G-PON device 2000 has as much space as possible and has high heat dissipation characteristics.

  In the G-PON device 2000, even when the cable 300 that transmits light is pulled from the outside, the cable fixing device 1000 holds the cable 300 effectively, safely, and securely. It is possible to reduce the concern that the stress is transmitted to adversely affect other components and characteristics.

  Further, in FIGS. 10 and 11, the cable fixing device 1000 does not give a tightening force to the cable 300 that transmits light in a natural state, so that the cable 300 is not bent, bent, compressed, or the like. A highly reliable G-PON device 2000 can be realized without deteriorating light transmission and the like, and the product life can be extended.

  The cable fixing device 1000 can flexibly cope with the case where the diameter of the cable 300 that transmits light is different.

  In addition, the cable fixing device 1000 is lightweight, inexpensive, and can be easily created with a simple structure and a small number of parts. This contributes to cost reduction of the G-PON device 2000 and is excellent in versatility.

  In addition, after temporarily fixing the cable stopper piece 100 to the cable 300, the position can be adjusted while fitting the cable stopper piece 100 into the pedestal 200, so that the work is performed outside the main body 2200 of the G-PON device 2000. The installation work is easy and simple. For example, screwing work or the like in the main body 2200 is unnecessary.

  In each of the above-described embodiments, the cable fixing device 1000 can apply a holding and fixing stress symmetrically and relatively uniformly to the outer skin of the cable 300 (typically, an optical fiber cable), so that stable holding and fixing can be performed. Is possible.

  Further, since the cable fixing device 1000 tightens the cable 300 as the cable 300 is pulled, there are few factors for reducing the pull-out prevention effect such as loosening of the fastening member due to secular change, vibration or the like. For this reason, the cable fixing device 1000 is preferable because the concern that the cable 300 is pulled out is reduced even in a severe environment or when years after installation have elapsed.

  The cable fixing device 1000 or the like described in each embodiment described above is not limited to the description in each embodiment, and its configuration, material, shape, structure, combination, etc. can be arbitrarily changed within a self-evident range. Can be used. Further, the cable fixing device 1000 may be configured to handle only the pulling out from either one and to suppress the pulling out.

  The present invention can be widely applied to electronic devices such as G-PON devices, optical cable connectors, and external cables.

  100..Cable stop piece, 115..Pressing clamping surface, 120..Central frame, 125..Notch groove, 200..Pedestal, 300..Cable, 1000..Cable fixing device, 2000..G-PON apparatus.

Claims (16)

A cable stop piece that has a substantially rhombus shape and loosely fits the cable to the diagonal line of the rhombus;
A base that holds the cable stopper piece and presses a pair of sides of the cable stopper piece on the pulled side so that the cable stopper piece clamps and holds the cable when the cable is pulled. And a cable fixing device. The cable fixing device according to claim 1,
Corresponding to the strength of the force with which the cable is pulled, the force with which the cable stopper piece presses the cable varies.
The cable fixing device, wherein the force with which the pedestal presses the cable stopper piece varies corresponding to the strength of the force with which the cable is pulled. In the cable fixing device according to claim 1 or 2,
The diagonal line of the cable stopper piece that loosely fits the cable is a diagonal line in the longitudinal direction,
When the cable is pulled,
The pair of sides of the cable stopper piece is pressed from the fixed inner wall of the base by moving the cable stopper piece together with the cable in the pulled direction. Fixing device. In the cable fixing device according to any one of claims 1 to 3,
The cable fixing device, wherein the pedestal includes a target inner wall in the cable direction so that the cable stopper piece press-clamps the cable regardless of which direction the cable is pulled. In the cable fixing device according to any one of claims 1 to 4,
In a natural state, the pedestal does not press the cable stopper piece. In the cable fixing device according to any one of claims 1 to 5,
The cable fixing device according to claim 1, wherein a pressing contact holding surface of the cable stopper piece that presses and holds the cable when the cable is pulled has a sawtooth shape. In the cable fixing device according to any one of claims 1 to 6,
The inner wall of the pedestal is curved in a convex shape,
When the cable is pulled, the pair of sides of the cable stopper piece is pressed in contact with the inner wall of the pedestal at points or lines, respectively. The cable fixing device according to claim 7, wherein
The curved inner wall of the pedestal is
Even when the strength of the force with which the cable is pulled fluctuates, a desired portion of the cable stopper piece is pressed so that the pair of press-clamping surfaces of the cable stopper piece that press-clamps the cable are in a parallel state. A cable fixing device. In the cable fixing device according to any one of claims 1 to 8,
The cable fixing piece has a frame shape including four straight frames constituting each side of a substantially rhombus in a plan view, and a central frame located on a diagonal line perpendicular to the cable. apparatus. The cable fixing device according to claim 9, wherein
The center frame includes a notch groove in which the cable is disposed. The cable fixing device according to claim 10, wherein
The cable fixing device, wherein the notch groove is formed of an elastic material so as to correspond to the cables having different diameters. The cable fixing device according to claim 11,
The cable fixing device, wherein the elastic material is a silicone resin. The cable fixing device according to any one of claims 10 to 12,
The cable fixing device, wherein the notch groove is tapered so as to correspond to the cables having different diameters. The cable fixing device according to any one of claims 1 to 13,
The cable fixing device is formed of a synthetic resin. The G-PON apparatus provided with the cable fixing apparatus as described in any one of Claims 1 thru | or 14. An optical cable fixing method using the cable fixing device according to any one of claims 1 to 14,
Loosely fitting an optical cable to the cable stop piece;
And a step of arranging the cable stopper piece on the pedestal. An optical cable fixing method comprising:

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