JP4655067B2 - Cable gripping structure - Google Patents

Description

The present invention relates to an extra length processing of an optical cable drawn into a home or an optical cable gripping structure used for a terminating device.

  As an optical cable used for the communication terminal device, there is a rectangular optical cable 51 including a tension member 14 and an optical fiber 15 as shown in FIG. In the conventional cable gripping tool, the optical cable 51 is sandwiched between clamps 16 and 17 divided into upper and lower parts as shown in FIG. 13, the clamps 16 and 17 are compressed from above and below, and the contact surface between the inside of the clamps 16 and 17 and the optical cable 51 is The optical cable 51 is fixed by frictional force.

  Patent Document 1 discloses a structure in which an optical cable is fixed to a cable outlet of a communication terminal device. The optical cable is sandwiched between the upper and lower gripping tools, and fixed to the optical cable outlet by sliding the gripping tool in the axial direction of the cable. Since the guide and gripping tool of the drawer opening are tapered, the distance between the divided gripping tools is narrowed so that the optical cable is compressed and the optical cable is fixed by frictional force.

Japanese Patent Laying-Open No. 2004-85714 (stages 0031 to 0032, FIG. 2)

  However, there is no problem when the optical cable 51 is gripped in the horizontal state as shown in FIG. 12A. However, when the optical cable 51 is gripped in the vertical state as shown in FIG. There was a problem that it was difficult to maintain the state and workability was poor.

  Further, since pressure cannot be applied to the long side surfaces 18a and 18b of the optical cable 51, it is unstable even after attachment. When the optical cable 51 is gripped in the vertical state as shown in FIG. Therefore, since the optical cable 51 is twisted 90 degrees and fixed in the horizontal position shown in FIG. 12A, there is a problem that the optical fiber 15 in the optical cable 51 is twisted to adversely affect the optical characteristics.

The present invention has been made to solve the above problems, and an object thereof is to provide an optical cable gripping structure capable of fixing the optical cable and stable.

Each of the optical cable gripping structures according to the present invention has a U-shaped cross section, and is fitted with the respective concave portions facing each other and sandwiching the cable, thereby holding the two clamp members for gripping the cable, A body portion for fixing the clamp member in a state where the cable is gripped, and one of the clamp members is smaller in size than the other clamp member to the extent that it fits inside the opposite clamp member. By providing a tapered portion on the side surface of the recessed portion of the one clamp member, the inner wall of the one clamp member being inclined so as to open wider toward the other clamp member. A space between the cable held by the clamp member and the one clamp member is narrowed .

According to the present invention, the side surface of the recessed portion of the one clamp member is provided with a tapered portion in which the inner wall of the one clamp member is inclined so as to open wider toward the other clamp member. Thus, since the space between the cable held by the two clamp members and the one clamp member is narrowed, the optical cable can be stably fixed .

Hereinafter, various embodiments of an optical cable holding structure according to the present invention will be described with reference to the drawings .
FIG. 1 is a perspective view showing a configuration of a communication terminal apparatus 201 using an optical cable gripping structure according to the present invention . FIG. 1A is an external perspective view illustrating an installation state of the communication terminal device 201, and FIG. 1B is a perspective view illustrating an internal configuration of the communication terminal device 201. FIG.

  1A and 1B, a communication terminal device 201 includes a device main body 1, an upper lid 2, a substrate 3, a fiber tray 4, an optical cable 51 and its connector 5, an adapter 6, and a cable outlet 7 of the upper lid 2. The optical cable holding tool 101 is used to fix the optical cable 51.

  FIG. 2 shows an enlarged view of the optical cable gripping tool 101. As shown in FIG. 2, the optical cable 51 is sandwiched between upper and lower clamps 8 and 9 (FIG. 2 (a)), and the clamps 8 and 9 sandwiching the optical cable 51 are held by a tapered upper side surface 8a. It engages with the tapered guide portion 10a of the tool body 10 and slides in the A direction until it is fixed (FIG. 2 (b)). The optical cable 51 is sandwiched between the clamps 8 and 9 by the pressure from the guide portion 10a, and is fixed by the frictional force with the clamps 8 and 9 (FIG. 2C).

Reference Example 1
Figure 3 is a cross-sectional view of the optical cable gripper 101 in B-B in FIG. 2 (c). In FIG. 3, clamps 8 and 9 fixed to the gripping tool body 10 of the optical cable gripping tool 101 have longitudinal guide portions 8b and 9b for sandwiching the optical cable 51 inside, and corresponding guide taper portions 8c and 9c, respectively. Have.

  The clamps 8 and 9 sandwich the optical cable 51 vertically from the upper direction (C direction) which is the short surface direction, so that the guide taper portions 8c and 9c are laterally (D The optical cable 51 is pressed and fixed to the vertical guide portions 8b and 9b. Since the optical cable 51 is fixed by pressing the long side surfaces 18a and 18b, which are longitudinal surfaces, the optical cable 51 stably holds the vertically placed state.

As described above, in the first reference example , the optical cable 51 is sandwiched from above and below using the clamps 8 and 9 provided with the longitudinal guide portions 8b and 9b and the guide taper portions 8c and 9c, and the guide taper portions 8c and 9c. Since the horizontal cable pressure is applied to the vertical guide portions 8b and 9b by the force applied to the corners of the optical cable 51, the optical cable can be stably maintained in the vertical position during installation. Will improve.

  Further, even in the case of the vertical installation state, the cable can be stably fixed without being twisted, and the optical characteristics of the optical fiber can be maintained.

In the first reference example , the vertical guide portions 8b and 9b are provided in both the upper and lower clamps 8 and 9, but may be provided only in one of the clamps. Figure 4 shows a cross-sectional view of the optical cable gripper 102 provided with a vertical guide section 9 b only the clamp 9. In this case, the degree of freedom increases in the longitudinal dimension of the rectangular optical cable to be sandwiched, and a single set of clamps can be used to fix optical cables having a wide range of dimensions.

In the first reference example , the vertical guide portions 8b and 9b and the guide taper portions 8c and 9c for fixing the optical cable 51 in the vertical state are provided in the clamps 8 and 9. You may arrange a recessed part in parallel. In this case, the optical cable can be fixed in a horizontal state with a set of clamps.

  Also, a circular optical cable having a size of φ2 mm, φ5 mm, etc. can be fixed. FIGS. 5 and 6 are horizontal recesses 8d and 9d arranged in parallel with the clamps 8 and 9 shown in FIGS. 3 and 4, respectively, and a circular optical cable 52 having a φ2 mm size and a rectangular optical cable 51 in a horizontal state are provided. An example of fixing is shown.

Embodiment 1 FIG.
In the optical cable gripping tool 101 using the optical cable gripping structure of the first reference example , the vertical guide portions 8b and 9b and the guide taper portions 8c and 9c are provided in both the upper and lower clamps 8 and 9, but this embodiment No. 1 shows a case where a longitudinal guide portion and a guide taper portion are provided only on one of the clamps.

FIG. 7 is a cross-sectional view showing a configuration of the optical cable gripping tool 103 using the optical cable gripping structure according to the first embodiment. In FIG. 7, clamps 11 and 12 are fixed to the gripping tool main body 10 of the optical cable gripping tool 103. The upper clamp 11 is a U-shaped clamp, and the lower clamp 12 has a vertically placed guide portion 12b and a guide taper portion 12c as in the first reference example .

  As shown in FIG. 7, the clamps 11 and 12 sandwich the optical cable 51 vertically from above and below via the auxiliary component 13. The auxiliary component 13 has a quadrangular prism shape in which only one of the long side surfaces of the rectangular parallelepiped has a tapered surface 13a corresponding to the guide tapered portion 12c. The optical cable 51 is inserted between the guide taper portion 12c of the clamp 12 with the auxiliary component 13 along the tapered surface 13a, and is sandwiched between the clamps 11 and 12, and the vertical guide portion 12b of the auxiliary component 13 and the clamp 12 is inserted. It is fixed by the frictional force.

  The clamps 11 and 12 sandwich the optical cable 51 and the auxiliary component 13 in a vertically placed state from above (C direction), so that the guide taper portion 12c applies pressure in the lateral direction (D direction) to the auxiliary component 13, Further, the auxiliary component 13 applies pressure to the optical cable 51 in the lateral direction, and presses and fixes the optical cable 51 to the vertical guide portion 12b.

  Since the long side surfaces 18a and 18b are pressed and fixed, the optical cable 51 stably maintains the vertically placed state. In addition, the optical cable 51 is not directly applied to the guide taper portion and pressure is applied from the corner portion, but is pressurized by contacting the guide taper portion 12c with the auxiliary component 13 and the auxiliary component 13 with each surface of the optical cable 51. Therefore, the vertical installation state is more stably maintained.

As described above, in the first embodiment, the clamp 12 provided with the vertical guide portion 12b and the guide taper portion 12c, and the auxiliary component 13 are inserted so that the taper surface 13a corresponds to the guide taper portion 12b. The optical cable 51 is sandwiched from above and below using the U-shaped clamp 11, and the pressure from the guide taper portion 12c applies lateral pressure to the vertical guide portion 12b via the auxiliary component 13 to the optical cable 51. As a result, it is possible to pressurize not the corners of the optical cable but the long side surface, and more stably maintain the cable in a vertically placed state at the time of attachment, further improving workability.

In the first embodiment, the optical cable 51 is fixed in a vertically placed state by the clamps 11 and 12, but can be fixed in a horizontally placed state. As shown in FIG. 8, the optical cable 51 is placed horizontally in the recess 12 d of the clamp 12, and the auxiliary component 13 is placed in contact with the parallel surface 13 b and sandwiched by the clamp 11 from above. Can be fixed.

  Also, a circular optical cable having a size of φ2 mm, φ5 mm, etc. can be fixed. In the case of a circular cable 52 having a small size such as φ2 mm, the optical cable 51 can be fixed by placing the auxiliary component 13 thereon and sandwiching the optical cable 51 with the clamps 11 and 12 in the same manner as in the horizontal state. In the case of a circular cable 53 having a large size such as φ5 mm, it can be fixed by directly sandwiching the clamps 11 and 12 without placing the auxiliary component 13 as shown in FIG.

Reference Example 2
In the optical cable gripping tool 103 using the optical cable gripping structure of the first embodiment, the vertically placed guide portion 12b and the guide taper portion 12c are provided in the lower clamp 12, but in this reference example 2 , the upper clamp is provided with the upper clamp. A case where a longitudinal guide portion and a guide taper portion are provided will be described.

FIG. 10 is a cross-sectional view showing a configuration of an optical cable gripping tool 104 using the optical cable gripping structure in Reference Example 2 . In FIG. 10, a clamp 12 is fixed to the gripper body 10 of the optical cable gripper 104 with the recess 12d facing downward. Similar to the clamp 12 of the first embodiment, the clamp 12 has a vertically placed guide portion 12b and a guide taper portion 12c.

As shown in FIG. 10, the clamp 12 sandwiches the optical cable 51 vertically from the vertical direction with the gripper main body 10 via the auxiliary component 13. As in the case of the first embodiment, the auxiliary component 13 has a quadrangular prism shape in which only one of the long side surfaces of the rectangular parallelepiped is a tapered surface. The optical cable 51 is inserted between the guide taper portion 12c of the clamp 12 such that the auxiliary part 13 corresponds to the taper surface 13a, and is sandwiched between the clamp 12 and the gripping tool body 10, and the vertical guide portion 12b of the clamp 12 is inserted. And fixed by the frictional force of the auxiliary component 13.

  The clamp 12 sandwiches the optical cable 51 and the auxiliary component 13 vertically placed from above (C direction), so that the guide taper portion 12c applies pressure in the lateral direction (D direction) to the auxiliary component 13 and further assists. The component 13 applies pressure to the optical cable 51 in the horizontal direction, and presses and fixes the optical cable 51 to the vertical guide portion 12a.

  Since the long side surfaces 18a and 18b are pressed and fixed, the optical cable 51 stably maintains the vertically placed state. Further, the optical cable 51 is not directly applied to the guide taper portion and pressure is applied from the corner portion, but is pressurized by contacting the guide taper portion 12b with the auxiliary component 13 and the auxiliary component 13 with each surface of the optical cable 51. Therefore, the vertical installation state is more stably maintained.

  The optical cable 51 is sandwiched between the clamp 12 and the gripper main body 10 via the auxiliary component 13 and is fixed by only one clamp 12 instead of a set of clamps.

As described above, in Reference Example 2 , the clamp 12 provided with the longitudinal guide portion 12b and the guide taper portion 12c and the taper surface 13a of the auxiliary component 13 are inserted so as to correspond to the guide taper portion 12c, and gripped. The optical cable 51 is sandwiched from above and below using the tool main body 10, and the pressure in the lateral direction to the vertically placed guide portion 12 a is applied to the optical cable 51 via the auxiliary component 13 by the force from the guide taper portion 12 c. Therefore, the optical cable can be stably kept in the vertical state with only one clamp at the time of attachment, and workability is improved. In addition, the number of parts can be reduced, and the cost can be reduced.

In the second reference example , the optical cable 51 is fixed in the vertical state by the clamp 12; however, it can be fixed in the horizontal state. As shown in FIG. 11, the auxiliary component 13 is inserted into the lower gripping tool body 10 so that the tapered surface 13a corresponds to the guide tapered portion 12c of the upper clamp 12, and the concave portion 12d of the clamp 12 and the auxiliary component 13 are inserted. Can be fixed by sandwiching the optical cable 51 horizontally.

It is a perspective view showing a configuration of a communication terminal device of the optical cable gripping structures according to the present invention. It shows a perspective view of an optical cable gripper of the optical cable gripping structures according to the present invention. It is sectional drawing which shows the structure of the optical cable holding tool of the reference example 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of the reference example 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of the reference example 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of the reference example 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the structure of the optical cable holding tool of Embodiment 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of Embodiment 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of Embodiment 1 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the structure of the optical cable holding tool of the reference example 2 of the optical cable holding structure which concerns on this invention. It is sectional drawing which shows the other structure of the optical cable holding tool of the reference example 2 of the optical cable holding structure which concerns on this invention. It is a cross-sectional perspective view which shows the structure of an optical cable. It is sectional drawing which shows the structure of the conventional optical cable holding structure.

Explanation of symbols

8, 9, 11, 12 Clamps 8b, 9b, 11b, 12b Guide portion 8c, 9c, 11c, 12c Guide taper portion 10 Grip tool body 13 Auxiliary component 13a Tapered surface

Claims (1)

Each has a U-shaped cross-section, and is fitted with the respective concave portions facing each other and sandwiching the cable, so that two clamp members for gripping the cable,
A main body for fixing the clamp member in a state of gripping the cable,
One of the clamp members is smaller in size than the other clamp member to the extent that it fits inside the other clamp member opposite to the other,
A side surface of the recessed portion of the one clamping member, by a provided a tapered portion which inner wall was the inclination of the one clamping member to the more widely open closer to the other clamp member, the two A cable gripping structure characterized by narrowing a space between the cable gripped by a clamp member and the one clamp member .

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