JP2010266519A - Optical fiber cable fixing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber cable fixing tool which fixes an optical fiber cable easily and surely without giving any adverse effect on the optical characteristics of the optical fiber cable, without using a tool such as a screw, when the optical fiber cable is fixed in the limited space of a communication apparatus or fixed for orderly arranging the optical fiber cable on the outside of the apparatus. <P>SOLUTION: The optical fiber cable fixing tool includes a groove into which the optical fiber cable is inserted from an upper part, formed on the upper part of a fixing base which is formed in a block shape. To both the opposing side faces of the groove, a plurality of spike blades whose tips in contact with the jacket of the optical fiber cable are formed in an acute angle, and which have angles in the pulling direction and the pushing direction of the optical fiber cable, and have spring characteristics, are provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical fiber cable fixing tool, and more particularly, to an optical fiber suitable for fixing an optical fiber cable in a limited space within a communication apparatus and suitable for fixing an optical fiber cable arrangement outside the apparatus. It relates to a cable fixture.

  In modern communication networks that continue to increase in speed and capacity, signals are transmitted and received using optical fiber cables instead of conventional electrical cables. As a large-capacity data communication service, recently, as an example, a data communication service for homes using optical fibers has become widespread. In this data communication service, a home-installed device for connecting a terminal device such as a personal computer to a network is subscribed. It is installed at the home of a person.

  An optical fiber cable is connected to the home-installed device via a cable fixture, and a thin fiber cable such as a drop cable is mainly used as the optical fiber cable.

  14 to 16 show a cable fixture disclosed in Patent Document 1, which includes a wedge clamp 5 for holding the optical fiber cable 3 and a fixing block 7 that is attached to a predetermined position of the home-installed device. And a cover 9 that covers the fixed block 7. The fixed block 7 is provided with a clamp mounting portion 11 having a concave cross section and tapered inner side surfaces. As shown in FIG. 15, the wedge-shaped clamp 5 is attached to the clamp mounting portion 11, and the saw teeth that the claw portions 13 provided on the wedge-shaped clamp 5 are locked on both side surfaces of the clamp mounting portion 11. A concave-convex portion 15 is provided.

  Thus, the optical fiber cable 3 is attached by the cable fixture 1 by sandwiching the outer sheath of the optical fiber cable 3 with the wedge clamp 5 as shown in FIG. 14, and inserting it into the clamp attachment portion 11 as shown in FIG. The optical fiber cable 3 is connected and fixed to the in-home installation type device by sliding the claw portion 13 to engage the serrated uneven portion 15, and finally the cover 9 is put on the fixed block 7 from above as shown in FIG. The connection part of the optical fiber cable 3 is protected.

  Patent Document 2 discloses an optical fiber cable clamping device for screwing an optical fiber cable and a tension member of the optical fiber cable with a clamp.

Japanese Patent Laid-Open No. 10-332953 Japanese Patent Laid-Open No. 2001-228381

  However, the cable fixture 1 has a limited wire diameter of the optical fiber cable 3 sandwiched between the wedge-shaped clamps 5, so that it is difficult to grip and fix optical fiber cables of various wire diameters that have recently been used. It has become.

  Further, since the cable fixture 1 uses a slide structure in which the wedge-shaped clamp 5 is inserted and slid into the clamp mounting portion 11 to connect and fix the optical fiber cable 3 to the apparatus, the extra length processing of the optical fiber cable 3 is performed. If the wedge clamp 5 is slid later and the optical fiber cable 3 is pulled, the fiber core may be broken.

  Furthermore, (1) the outer cover of the optical fiber cable 3 is sandwiched by the wedge clamp 5, (2) this is inserted into the clamp mounting part 11, and (3) the wedge clamp 5 is slid so that the claw part 13 is serrated Many steps of locking the portion 15 are required, and the clamp mounting portion 11 is increased in order to secure the slide length of the wedge-shaped clamp 5, and the number of parts is increased.

  On the other hand, in the conventional structure in which the optical fiber cable is fastened and fixed as in Patent Document 2, since the fiber core wire inside the optical fiber cable is also tightened at the same time, the fiber core wire may be distorted and optical characteristics may be hindered.

  Further, if the tightening is reduced in order not to affect the optical characteristics, it becomes difficult to securely fix the optical fiber cable, and a phenomenon occurs that the optical fiber cable is unfixed. However, it has been pointed out that a tool for screwing is required, which takes time and man-hours.

  The present invention has been devised in view of such circumstances, and in the fixing of the optical fiber cable in a limited space in the communication apparatus and for fixing the optical fiber cable outside the apparatus, the optical fiber cable is provided. It is an object of the present invention to provide an optical fiber cable fixture that can easily and reliably fix an optical fiber cable without adversely affecting the optical characteristics of the optical fiber without using tools such as screws.

  In order to achieve such an object, the invention according to claim 1 is an optical fiber cable fixture in which a groove into which an optical fiber cable can be inserted from above is formed in an upper part of a fixing base formed in a block shape. A plurality of spike blades having a spring property that is angled in the pulling direction and the pushing direction of the optical fiber cable are formed on both opposite side surfaces of the inside so that the tip that contacts the outer sheath of the optical fiber cable is formed at an acute angle. And

  The invention according to claim 2 is the optical fiber cable fixture according to claim 1, wherein the spike blades that are angled in the pulling direction of the optical fiber cable are provided to face the side surface of the groove, The spike blade having an angle in the pushing direction is provided to face the side surface of the groove.

  Furthermore, the invention according to claim 3 is the optical fiber cable fixture according to claim 2, wherein the spike blade angled in the pulling direction of the optical fiber cable and the spike blade angled in the push-in direction. The invention according to claim 4 is characterized in that the optical fiber cable fixture according to claim 2 is angled in the pulling direction of the optical fiber cable. The spike blades and the spike blades having an angle in the pushing direction are provided above and below the side surface of the groove.

  According to a fifth aspect of the present invention, in the optical fiber cable fixture according to the first aspect, a plurality of spike blades having an angle in the pulling direction are provided on one side surface of the groove. A plurality of spike blades having an angle in the push-in direction are provided on the other side surface facing each other.

  On the other hand, according to a sixth aspect of the present invention, in the optical fiber cable fixture according to any one of the first to fifth aspects, an R or C surface is provided on the upper end of the spike blade. The invention according to claim 7 is characterized in that, in the optical fiber cable fixture according to any one of claims 1 to 6, R is provided on both side surfaces of the entrance before and after the groove. It is characterized by being attached.

  The invention according to claim 8 is the optical fiber cable fixture according to any one of claims 1 to 7, wherein the fixing base is rotatably attached to a fixing portion of the optical fiber cable. According to a ninth aspect of the present invention, in the optical fiber cable fixture according to any one of the first to seventh aspects, the fixing base is integrally formed at a fixing portion of the optical fiber cable. It is characterized by.

According to the inventions according to claims 1 to 5,
(a) When fixing the optical fiber cable, it is only necessary to insert (insert) the optical fiber cable into the groove of the fixing base, and no special tools or skills are required.

(b) Since the spike blade has a spring property in which the tip side expands outward by the force of fitting the optical fiber cable into the groove, the optical fiber cable can be easily fitted into the groove.
(c) The optical fiber cable fitted in the groove is pressed and held by the tip of the spike blade, and when the fiber optic cable is pulled or pushed, the tip of the spike blade bites into the outer sheath of the fiber optic cable. In order to prevent the optical fiber cable from coming off in the pulling direction and the pushing direction, the optical fiber cable can be securely fixed.

 (d) Since the spike blade only bites into the outer sheath of the optical fiber cable, no stress is applied to the fiber core, so that the optical characteristics of the optical fiber cable are not adversely affected.

 (e) Since the outer sheath of the optical fiber cable is pressed with spring spike blades, even if there is a tolerance of the outer diameter of the outer sheath of the optical fiber cable, the tolerance is absorbed by the repulsion of the spring properties of the spike blade to ensure sufficient fixing force. be able to.

 (f) The cost can be reduced by simplifying the structure and reducing the number of parts, and the holding structure for the optical fiber cable can be made small, so that the communication device (housing) can be downsized.

  According to the invention according to claim 6, since the R-side or C-face is applied to the upper end of the spike blade, the optical fiber cable can be smoothly fitted into the groove. According to the invention, R is attached to both side surfaces of the front and rear entrances before and after the groove. Therefore, even if the optical fiber cable is bent to the left and right after the optical fiber cable is inserted into the groove of the fixing base, the fiber core wire has an excess. There is no load.

  Further, according to the invention of claim 8, the fixing base is rotatably attached to the fixing portion of the optical fiber cable so that the fixing base is rotated along the route of the optical fiber cable when the optical fiber cable is inserted into the groove. Therefore, no extra load is applied to the fiber core.

  According to the ninth aspect of the present invention, there is an advantage that component management of the fixing base becomes unnecessary by integrally forming the fixing base at the fixing portion of the optical fiber cable.

1 is an overall perspective view of an optical fiber cable fixture according to a first embodiment of claims 1 to 3 and claims 6 to 8; It is a top view of an optical fiber cable fixture. It is the III-III sectional view taken on the line of FIG. It is the C section enlarged plan view of FIG. It is explanatory drawing of the attachment method of an optical fiber cable fixing tool. It is a bottom part side whole perspective view of an optical fiber cable fixture. It is a whole perspective view of the optical fiber cable fixture which concerns on 2nd embodiment of Claim 1 thru | or Claim 3 and Claim 6 thru | or 8. It is a top view of an optical fiber cable fixture. It is a whole perspective view of the optical fiber cable fixture concerning one embodiment of Claim 1 thru / or Claim 3, Claim 6, and Claim 7. It is a top view of the optical fiber cable fixture which concerns on one Embodiment of Claim 1, Claim 2, Claim 4, and Claim 6 thru | or 8. It is the XI-XI sectional view taken on the line of FIG. It is a top view of the optical fiber cable fixture which concerns on one Embodiment of Claim 1, Claim 5 thru | or 8. It is the XIII-XIII sectional view taken on the line of FIG. It is a perspective view of the wedge-shaped clamp which comprises the conventional optical fiber cable fixing tool. It is a perspective view which shows the fixing method of the optical fiber cable by the conventional optical fiber cable fixing tool. It is a perspective view which shows the fixing method of the optical fiber cable by the conventional optical fiber cable fixing tool.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 6 show an optical fiber cable fixture according to the first embodiment of claims 1 to 3 and claims 6 to 8. In FIG. 1, 21 is an ABS resin as an example. In a fixed base formed in a block-like rectangular parallelepiped shape, a linear groove 27 is provided in the longitudinal direction at the center of the upper portion 23 so that an optical fiber cable (drop cable) 25 can be inserted (inserted) from above. .

  As shown in FIGS. 1 and 2, the optical fiber cable 25 is positioned and held from both the left and right sides of the center of the groove 27 and both the front and rear sides of the groove 27 (front and rear in the longitudinal direction of the fixed base 21). A pair of projecting pieces 29a, 29b, 31a, 31b, 33a, 33b projecting from the upper portion 23 so as to be flush with each other. C corners are formed on the upper corners of the tips of the projecting pieces 29a, 29b, 31a, 31b, 33a, 33b, and R is provided on the side of the tip of the projecting pieces 31a, 31b, 33a, 33b on the entrance / exit side. With this structure, it is easy to insert the optical fiber cable 25 into the groove 27 from above the fixed base 21, and after inserting the optical fiber cable 25 into the groove 27 as shown in FIG. Is bent left and right as indicated by a two-dot chain line, an extra load is not applied to the fiber core of the optical fiber cable 25.

  Further, as shown in FIGS. 1 and 2, the optical fiber cable 25 is pulled on both side surfaces of the groove 27 between the projecting pieces 29a and 29b and the projecting pieces 31a and 31b with the center projecting pieces 29a and 29b interposed therebetween. A plurality of spike blades 35 having an angle θ (θ≈35 °) in the direction (the direction of arrow A in FIGS. 1 and 2) are provided opposite to each other, and spaced apart from the spikes 29a and 29b. A plurality of spike blades having an angle θ (θ≈35 °) in the pushing direction of the optical fiber cable 25 (in the direction of arrow B in FIGS. 1 and 2) on both sides of the groove 27 between the projecting pieces 33a and 33b. 37 are provided facing each other.

  Thus, as shown in FIGS. 1 to 4, the spike blades 35 and 37 each have a blade shape like a thin fin projecting inward of the groove 27 with the angle θ, and are fixed. It is provided flush with the upper part 23 with a height of approximately half of the table 21.

  The spike blades 35 and 37 have a spring property that spreads outward from the shape shown by the solid line in FIG. 4 when the optical fiber cable 25 is inserted into the groove 27, and on the contrary, is a certain constant. It has a structure that does not deform inward from the position. After the optical fiber cable 25 is inserted, the spike blades 35 and 37 press the outer sheath 39 of the optical fiber cable 25 with the restoring force after deformation, and hold it.

  Further, as shown in FIGS. 1, 2 and 4, the tips of the spike blades 35 and 37 that contact the outer skin 39 of the optical fiber cable 25 are formed at an acute angle, and thus the tips of the spike blades 35 and 37 are formed in this way. By forming the optical fiber cable 25 into an acute angle, the optical fiber cable 25 is pulled by a so-called spike action in which the tip of the spike blade 37 bites into the outer skin 39 of the optical fiber cable 25 when the optical fiber cable 25 inserted into the groove 27 is pulled in the direction of arrow A. It is difficult to pull out from the groove 27 in the pulling direction.

  Similarly, when the optical fiber cable 25 inserted into the groove 27 is pushed in the direction of arrow B, the optical fiber cable 25 is pushed in from the groove 27 in the pushing direction by the spike action in which the tip of the spike blade 35 bites into the outer skin 39 of the optical fiber cable 25. It is hard to come off.

  Similarly to the protrusions 29a, 29b, 31a, 31b, 33a, 33b, in order to facilitate the insertion of the optical fiber cable 25 into the groove 27 from above, the spike blades 35, 37 as shown in FIGS. A C-face is formed on the upper end of the tip. In addition, it may replace with C surface and may attach R.

  On the other hand, as shown in FIGS. 3, 5, and 6, the bottom 41 of the fixing base 21 is provided with a rectangular recess 43 in plan view that communicates with the groove 27, leaving a peripheral edge, and is provided at the center. A support piece 45 is provided so as to be flush with the bottom 41. A single clamp (locking claw) 47 having a conventionally well-known spring property is provided on the support piece 45 so as to protrude downward. As shown in FIG. The fixing base 21 is rotatably mounted in the casing 49 by being inserted into a fixing hole 51 provided in the fixing portion of the optical fiber cable 25.

  In addition, in FIG. 1, 52 is a connector attached to the optical fiber cable 25.

  The optical fiber cable fixture 53 according to the present embodiment is configured as described above. Next, a method for fixing the optical fiber cable 25 using the optical fiber cable fixture 53 will be described.

  First, as shown in FIG. 5, the clamp 47 is inserted into the fixing hole 51 provided in the housing 49 of the communication device, and the fixing base 21 is rotatably attached.

  Then, after connecting the connector 52 of the optical fiber cable 25 to the connector in the housing 49, as shown in FIG. 1, the optical fiber cable 25 is inserted into the groove 27 provided in the upper part 23 of the fixing base 21 from above ( If the optical fiber cable 25 is inserted into the groove 27, the optical fiber cable 25 is rotated along the route of the optical fiber cable 25. Good.

  Thus, as described above, since the protrusions 29a, 29b, 31a, 31b, 33a, 33b and the spike blades 35, 37 are c-faced on the top end side, the optical fiber cable 25 is placed in the groove 27. Since the leading ends of the spike blades 35 and 37 spread outward by the force of fitting the optical fiber cable 25 into the groove 27 as shown by the two-dot chain line in FIG. 25 can be easily fitted into the groove 27. After the optical fiber cable 25 is inserted, the spike blades 35 and 37 hold the outer sheath 39 of the optical fiber cable 25 by holding the deformed restoring force.

  As described above, since the spike blades 35 and 37 are structured not to be deformed inward from a certain position, the spike blades 35 and 37 are spiked against pulling or pushing of the optical fiber cable 25 fitted in the groove 27. The tips of the blades 35 and 37 bite into the outer sheath 39 of the optical fiber cable 25 (spike action) to prevent the optical fiber cable 25 from coming off in the pulling direction and the pushing direction from the groove 27.

  As described above, the optical fiber cable 25 can be fixed to the housing 49 using the optical fiber cable fixture 53 according to the present embodiment. According to the present embodiment, the following excellent effects can be obtained as compared with the related art. Have.

 (1) When fixing the optical fiber cable 25, it is only necessary to fit the optical fiber cable 25 into the groove 27 of the fixing base 21, and no special tools or skills are required, so that the operation can be performed easily.

 (2) Since the C-face is formed on the tip side upper portions of the projecting pieces 29a, 29b, 31a, 31b, 33a, 33b and the spike blades 35, 37, the optical fiber cable 25 can be smoothly fitted into the groove 27. .

 (3) As shown by a two-dot chain line in FIG. 4, the tip side of the spike blades 35 and 37 spreads outward by the force of fitting the optical fiber cable 25 into the groove 27, so the optical fiber cable 25 is easily fitted into the groove 27. be able to.

 (4) The optical fiber cable 25 fitted in the groove 27 is pressed and held by the tips of the spike blades 35 and 37, and the tips of the spike blades 35 and 37 are optical fibers when the optical fiber cable 25 is pulled or pushed. The optical fiber cable 25 can be securely fixed in order to bite into the outer skin 39 of the cable 25 and prevent the optical fiber cable 25 from coming off in the pulling direction and the pushing direction from the groove 27.

 (5) Since the spike blades 35 and 37 only bite into the outer sheath 39 of the optical fiber cable 25 and no stress is applied to the fiber core wire, the optical characteristics of the optical fiber cable 25 are not adversely affected.

 (6) Since the outer sheath of the optical fiber cable 25 is pressed by the spike blades 35 and 37 having spring properties, even if a tolerance of the outer diameter of the optical fiber cable occurs, the tolerance is absorbed by the repulsion of the spring properties of the spike blades 35 and 37. Sufficient fixing force can be secured.

 (7) Since the fixing base 21 can be rotatably attached to the casing 49, the fixing base 21 can be rotated along the route of the optical fiber cable 25 when the optical fiber cable 25 is inserted into the groove 27. An extra load is not applied to the fiber core of the cable 25.

 (8) Since the front end side surfaces of the projecting pieces 31a, 31b, 33a, 33b on the entrance / exit side of the groove 27 are rounded, the optical fiber cable 25 is inserted into the groove 27 as shown in FIG. Is bent left and right as indicated by a two-dot chain line, no extra load is applied to the fiber core of the optical fiber cable 25.

 (9) Compared with the conventional example of FIG. 14, the cost can be reduced by simplifying the structure and reducing the number of parts, and the holding structure for the optical fiber cable 25 is made small, so that communication equipment (housing 49) It was possible to reduce the size.

  In the above-described embodiment, the optical fiber cable fixture 53 is used for fixing the optical fiber cable 25 in the housing 49 of the optical communication apparatus. Of course, it can be used.

  FIGS. 7 and 8 show an optical fiber cable fixture according to the second embodiment of claims 1 to 3 and claims 6 to 8, and this embodiment replaces the outer shape of the fixing base 21. The fixing base 55 is formed in a block-like columnar shape, and a base 59 of the fixing base 55 is integrally projected in the housing 57 (fixed portion of the optical fiber cable 25) of the communication device. Except for the cylindrical outer shape, the other structures are the same as those of the fixed base 21. Therefore, the same components are denoted by the same reference numerals, and description thereof is omitted.

  On the other hand, as shown in the figure, the base 59 is formed in a rectangular shape in plan view, and a pair of guides in which an arcuate guide surface 63 along the outer shape of the fixed base 55 is opposed to the longitudinal end of the upper surface 61. A portion 65 is provided, and the fixing base 55 is accommodated in the pair of guide portions 65 along both guide surfaces 63.

  The back side of the base 59 is hollow, and a fixing hole 67 into which a clamp 47 protruding from the bottom of the fixing base 55 can be inserted is provided at the center of the upper surface 59 between the two guide parts 63. By inserting the clamp 47 into the fixing hole 67, the fixing base 55 is rotatably attached between the pair of guide portions 65.

  The optical fiber cable fixture 69 according to the present embodiment is configured as described above, and the present embodiment can achieve the intended purpose as in the case of the optical fiber cable fixture 53 as described above. The effects 1) to 9) can be achieved.

  In the two embodiments described above, the fixing bases 21 and 55 are rotatably attached to the casings 49 and 57. For example, two clamps 47 shown in FIG. Corresponding to these, two fixing holes 51 may be provided on the housing 49 side to fix the fixing base 21 to the housing 49 in a non-rotatable manner.

  In addition, as shown in FIG. 9, the fixing base 73 may be fixed in the housing 75 (fixed part of the optical fiber cable 25) by using the mounting screw 71, and in this embodiment, the clamp 47 of the fixing base 21 is fixed to the clamp 47. Instead, a screw insertion hole 77 is provided in the support piece at the bottom of the fixed base 73, and a mounting screw hole 79 is provided on the housing 75 side.

  The fixing base 73 is a pair of protruding pieces having a recess 83 along the outer shape of the screw head 81 of the mounting screw 71 instead of the protruding pieces 29a and 29b provided at the center of the groove 27 of the fixing base 21. The other protrusions 31a, 31b, 33a, 33b, spike blades 35, 37, and the like have the same structure as the fixed base 21.

  The optical fiber cable fixture 87 according to the present embodiment is configured as described above, and the present embodiment can achieve the intended purpose as in the case of the optical fiber cable fixture 53 as described above. The effects of (1) to (6), (8) and (9) can be achieved.

  FIGS. 10 and 11 show an optical fiber cable fixture according to an embodiment of claims 1, 2, 4, and 6 to 8, and an optical fiber cable fixture 89 according to this embodiment includes: In place of the projecting pieces 29a and 29b and the spike blades 35 and 37 in FIG. 2, the optical fiber cable 25 is pulled in the upper direction on both side surfaces of the groove 95 provided in the upper part 93 of the fixing base 91 (the direction of arrow A in FIG. 10). A plurality of spike blades 97 that are angled to each other are provided so as to face each other, and a plurality of spikes that are angled in the push-in direction of the optical fiber cable 25 (in the direction of arrow B in FIG. 10) are provided below both side surfaces of the groove 95. As shown in FIG. 11, the upper end of the spike blade 97 located on the upper side is C-faced and the optical fiber cable 25 to the groove 95 is provided. Fit has become easily. Further, projecting pieces 101 a, 101 b, 103 a, 103 b having the same structure as the 31 a, 31 b, 33 a, 33 b are formed on the upper portion 93 on both side surfaces of the entrance before and after the groove 95 (front and rear in the longitudinal direction of the fixed base 91). It is provided so as to face the same surface.

  Note that the spike blades 97 and 99 of the present embodiment also have a spring property that spreads outward when the optical fiber cable 25 is inserted into the groove 95, similarly to the spike blades 35 and 37, and conversely from a certain position. It has a structure that does not deform inward. After the optical fiber cable 25 is inserted, the spike blades 97 and 99 press the outer sheath 39 of the optical fiber cable 25 with the restoring force after deformation, and hold it.

  Further, as shown in FIGS. 10 and 11, the tips of spike blades 97 and 99 that contact the outer skin 39 of the optical fiber cable 25 are formed at an acute angle. The optical fiber cable 25 is difficult to be removed from the groove 95 by a spike action in which the tip of 99 bites into the outer skin 39 of the optical fiber cable 25.

  As shown in FIG. 11, the bottom portion 105 of the fixing base 91 is provided with a rectangular concave portion 107 that communicates with the groove 95 leaving a peripheral portion, and the clamp 47 projects from the center thereof. The support piece 45 shown in FIG. 6 is installed. And also in this embodiment, the fixing stand 91 is rotatably attached in a housing | casing by inserting in the fixing hole provided in the housing | casing (fixed part of the optical fiber cable 25) which is not shown in figure.

  Since the optical fiber cable fixture 89 according to the present embodiment is configured as described above, the clamp 47 is inserted into the fixing hole 51 in the housing, the fixing base 91 is rotatably attached, and then the optical fiber cable 25 is fixed. Insertion into the groove 95 provided in the upper part 93 of the base 91 is only necessary (inserted) from above, and the fixing base 91 is rotatably attached to the housing, so that the optical fiber cable 25 is inserted into the groove 95. The fixing base 91 may be rotated along the route of the optical fiber cable 25.

  Thus, as described above, the protrusions 101 a, 101 b, 103 a, 103 b and the spike blades 97 are provided with C-faces on the tip side, so that the optical fiber cable 25 is smoothly guided into the groove 95. Insertion is easy, and the tip side of the spike blades 97 and 99 spreads outward by the force of fitting the optical fiber cable 25 into the groove 95, so that the optical fiber cable 25 can be easily fitted into the groove 95. After the optical fiber cable 25 is inserted, the spike blades 97 and 99 hold the outer sheath 39 of the optical fiber cable 25 from above and below with the restoring force after deformation.

  As described above, since the spike blades 97 and 99 are structured not to be deformed inward from a certain position, the spike blades 97 and 99 are spiked against the pulling and pushing of the optical fiber cable 25 fitted in the groove 95. The tips of the blades 97 and 99 bite into the outer sheath 39 of the optical fiber cable 25 (spike action) to prevent the optical fiber cable 25 from coming off in the pulling direction and the pushing direction from the groove 95.

  As described above, the optical fiber cable 25 can be fixed to the casing by using the optical fiber cable fixture 53 according to the present embodiment. It is possible to achieve the effects (1) to (9) described above.

  FIGS. 12 and 13 show an embodiment of the invention according to claims 1, 5 to 8, and an optical fiber cable fixture 109 according to this embodiment replaces the spike blades 97 and 99, and a fixing base. A plurality of spike blades 117 that are angled in the pulling direction of the optical fiber cable 25 (in the direction of arrow A in FIG. 12) are provided on one of both side surfaces of the groove 115 provided on the upper portion 113 of the upper surface 113, and opposite thereto. The other side surface of the groove 115 is provided with a plurality of spike blades 119 that are angled in the pushing direction of the optical fiber cable 25 (in the direction of arrow B in FIG. 12). As shown in FIG. The top end side of the 119 is C-faced so that the optical fiber cable 25 can be easily fitted into the groove 115.

  Thus, the spike blades 117 and 119 of the present embodiment also have a spring property that spreads outward when the optical fiber cable 25 is inserted into the groove 115, and conversely has a structure that does not deform inward from a certain position. ing. After the optical fiber cable 25 is inserted, the spike blades 117 and 119 press the outer skin 39 of the optical fiber cable 25 with the restoring force after deformation, and hold it.

  Further, as shown in FIGS. 12 and 13, the tips of the spike blades 117 and 119 that come into contact with the outer skin 39 of the optical fiber cable 25 are formed at an acute angle. The optical fiber cable 25 is difficult to be removed from the groove 115 by a spike action in which the tip of the 119 bites into the outer skin 39 of the optical fiber cable 25.

  As shown in FIG. 13, the bottom 121 of the fixed base 111 is provided with a rectangular recess 123 in plan view that communicates with the groove 115, leaving a peripheral edge, and the clamp 47 projects from the center thereof. The support piece 45 shown in FIG. 6 is installed. In this embodiment, the fixing base 111 is rotatably mounted in the casing by being inserted into a fixing hole provided in a casing (fixed portion of the optical fiber cable 25) (not shown). The fixed base 111 is formed shorter in the longitudinal direction than the fixed bases 21, 73, 91.

  The optical fiber cable fixture 109 according to the present embodiment is configured as described above, and the present embodiment can achieve the intended purpose as in the case of the optical fiber cable fixture 53 as described above. The effects of 1) to (9) can be achieved, and the fixed base 111 is shorter in the longitudinal direction than the fixed bases 21, 73, 91, so that it can be used in a smaller space. It becomes possible.

  Each of the above-described embodiments has a structure in which the fixing base is rotatably attached to the casing or the fixing base is retrofitted to the casing by using mounting screws. As described above, the fixing table described above may be formed integrally with the fixing portion of the optical fiber cable.

  Thus, according to such an embodiment, the intended purpose can be achieved as in the embodiment of FIG. In addition, according to the present embodiment, the structure in which the fixed base is integrally formed with the housing or the like has an advantage that the parts management of the fixed base becomes unnecessary.

  As described above, it goes without saying that the present invention can be used for fixing an optical fiber cable for adjusting the wire outside the apparatus.

21, 55, 73, 91, 111 Fixed base 23, 93, 113 Upper part 25 of fixed base Optical fiber cable 27, 95, 115 Groove 29a, 29b, 31a, 31b, 33a, 33b, 85a, 85b, 101a, 101b, 103a , 103b Projection piece 35, 37, 97, 99, 117, 119 Spike blade 39 Optical fiber cable sheath 47 Clamp 49, 57, 75 Case of communication device (fixed part of optical fiber cable)
51, 67 Fixing hole 52 Clamp 53, 69, 87, 89, 109 Optical fiber cable fixture 59 Base 63 Guide surface 65 Guide portion 71 Mounting screw 77 Screw insertion hole 79 Mounting screw hole 83 Recess

Claims (9)

An optical fiber cable fixture in which a groove into which an optical fiber cable can be inserted from above is formed on the upper part of a fixed base formed in a block shape,
The opposite end surfaces inside the groove are provided with a plurality of spike blades having a sharp tip formed in contact with the outer sheath of the optical fiber cable and having an angled spring property in the pulling and pushing directions of the optical fiber cable. An optical fiber cable fixture.   The spike blade angled in the pulling direction of the optical fiber cable is provided to face the side surface of the groove, and the spike blade angled in the push-in direction is provided to face the side surface of the groove. The optical fiber cable fixture according to claim 1.   The spike blade having an angle in the pulling direction of the optical fiber cable and the spike blade having an angle in the push-in direction are provided apart from each other before and after the groove. Fiber optic cable fixture.   3. The optical fiber according to claim 2, wherein the spike blades having an angle in the pulling direction of the optical fiber cable and the spike blades having an angle in the pushing direction are provided above and below the side surface of the groove. Cable fixture.   A plurality of spike blades that are angled in the pulling direction are provided on one side surface of the groove, and a plurality of spike blades that are angled in the pushing direction are provided on the other side surface thereof. The optical fiber cable fixture according to claim 1.   The optical fiber cable fixture according to any one of claims 1 to 5, wherein an R-side or a C-side is provided on an upper end side of the spike blade.   The optical fiber cable fixture according to any one of claims 1 to 6, wherein R is attached to both side surfaces of the entrance before and after the groove.   The optical fiber cable fixture according to any one of claims 1 to 7, wherein the fixing base is rotatably attached to a fixing portion of the optical fiber cable. The optical fiber cable fixture according to any one of claims 1 to 7, wherein the fixing base is integrally formed at a fixing portion of the optical fiber cable.

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