JP2013050653A - Housing for catv apparatus and catv apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CATV apparatus which allows various devices, units and the like in a housing to be taken out of the inside of the housing without detaching an optical cable and a tension member from the housing.SOLUTION: In a housing of a CATV apparatus where a peripheral wall 19 of one of a body 2 and a lid is provided with an optical cable connection terminal 6, a part of the peripheral wall 19 of the body 2 or the lid, which is provided with the optical cable connection terminal 6, is provided with a support 10 which can support a tension member T inserted into the housing from the optical cable connection terminal 6. The support 10 is projected more inside the housing than a peripheral wall inner surface and provided at a forward position in an axial direction of the tension member T. One or two or more supports 10 may be provided on the same inner surface of the same peripheral wall. When the optical cable connection terminals 6 are provided on two opposite peripheral walls 19 of the body 2 or the lid, the supports 10 may be provided at two points of the peripheral wall 19 between both the peripheral walls, closer to the respective optical cable connection terminals 6.

Description

  The present invention relates to a CATV device casing laid in a CATV transmission system and a CATV device using the casing.

  Various CATV devices such as an optical coaxial amplifier, a bidirectional amplifier, and an extension amplifier are laid on the transmission line of the CATV system. There are various signal transmission systems for CATV systems, and one of them is an optical / coaxial hybrid system (HFC system: Hybrid Fiber / Coaxial System system). The HFC system uses an optical cable suitable for long-distance transmission on the trunk line from the cable TV center to the optical transceiver (node), and uses a coaxial cable that can be easily branched and distributed from the branch line from the node to the subscriber's house. It is a method to do. In the HFC system, an optical transmission device is laid on the CATV transmission line.

  An example of optical transmission equipment laying is shown in FIG. In FIG. 9, the optical cable C is connected to the optical cable connection terminal B of the optical transmission device A, the coaxial cable E is connected to the coaxial cable connection terminal D of the optical transmission device A, and the coaxial cable G is connected to the branch terminal F. In this optical transmission device A, a downstream optical signal input from the optical cable C to the optical transmission device A is converted into an electrical signal (O / E conversion) and sent to the coaxial cable connection terminal D, and optical transmission is performed from the coaxial cable connection terminal D. The upstream electrical signal input to the device A is converted into an optical signal (E / O conversion) and sent to the optical cable connection terminal B. Further, the branch signal subjected to O / E conversion as required is sent to the branch terminal F. Although FIG. 9 shows a bidirectional CATV system, the CATV system includes a unidirectional CATV system that only transmits a downstream optical signal from a cable television center to a subscriber. In the unidirectional CATV system, there is no E / O converter, upstream signal processing circuit, or the like.

  As shown in FIG. 10, the optical transmission device A normally includes a housing K in which a main body H and a lid body I are connected to each other at a connecting portion J so as to be opened and closed. The main body H and the lid body I can be disassembled (removed) as necessary. Usually, the main body H and the lid body I are made of aluminum die cast. The peripheral wall of the main body H is also provided with an optical cable connection terminal B, a coaxial cable connection terminal D, a power supply terminal for individual power supply, a monitor terminal, and the like. The main body H contains O / E converters, E / O converters, and other devices necessary for optical transmission equipment, and is made of metal for protection or blindfolding of the equipment from above. The panel L is covered, and several parts of the panel L are fixed to the main body H with screws M. The lid I usually has an AC 30 / 60V superimposed on the coaxial cable E (FIG. 9), a power supply circuit for supplying power to the devices and circuits in the main body H, and other devices. Etc. are built-in.

  Some optical transmission devices A are installed indoors, while others are installed in the air. When erected in the air, conventionally, as shown in FIG. 10, the outer cover of the optical cable C is peeled off, and the tension member (strength line) T and the signal line (optical fiber) N in the outer cover are drawn out of the outer cover, The tension member T and the optical fiber N are inserted into the optical cable connector O, the optical cable C is attached to the optical cable connector O, and the optical cable connector O is connected to the optical cable connection terminal B. The tension member T is sandwiched between an upward U-shaped receptacle P and a downward U-shaped retainer Q, and the tension member T is fixed on the panel L with a set screw R with the receptacle P facing downward. T is fixed to the panel L. The optical fiber N is connected to the extra fiber length S or other equipment or wiring.

  As a fixing tool for fixing the tension member T to the optical transmission device A, there is one shown in Patent Document 1 according to the application of the present applicant, which is replaced with the receiving tool P and the pressing tool Q shown in FIG. The optical transmission device A is molded separately from the casing K of the optical transmission device A, and is used by screwing it to the panel L, chassis, etc. in the casing K.

JP 2007-121967 A

  In the CATV transmission system, work such as system expansion, change, maintenance inspection, and repair may be performed after the start of operation. In this case, various devices such as an O / E converter and an E / O converter in the housing K of the optical transmission device A may be removed from the housing K (main body H in FIG. 10) and pulled out. However, since the tension member T is fixed to the panel L in the main body H as shown in FIG. 10, in order to pull out the device in the main body H, the tension member T is removed from the panel L and the optical cable connector O (FIG. 10) has to be removed from the optical cable connection terminal B. After the above operation is completed, the device pulled out from the main body H is returned to the main body H, the optical connector O previously removed is reconnected to the optical cable connection terminal B, and the tension member T is further connected to the panel L. And the optical fiber N has to be reconnected to the lower connection location in the main body. These troubles are the same when the fixture of Patent Document 1 is used.

  The problem to be solved by the present invention is that the tension member can be removed from the housing of the CATV device without removing the tension member from the panel or the optical connector from the CATV device. Another object of the present invention is to provide a CATV device casing that does not have the trouble of removing and reconnecting cables and connecting, and a CATV device using the casing.

(CATV equipment housing)
The CATV device casing of the present invention is configured by a main body and a lid that are connected so as to be openable and closable. In the case of a CATV device having an optical cable connection terminal on one of the peripheral walls of the main body and the lid, it is a peripheral wall of the main body or the lid, and is inserted into the casing from the optical cable connection terminal near the optical cable connection terminal. A support member for supporting the tension member is provided. The support member protrudes into the housing from the inner surface of the peripheral wall, and is provided in the axial direction of the tension member.

  One or more supports may be provided on the same surface of the same peripheral wall in the CATV device casing.

  The support in the CATV device casing can be provided on the inner surface of the peripheral wall adjacent to the peripheral wall provided with the optical cable connection terminal.

  In the case for the CATV device, the optical cable connection terminal can be provided on two opposing peripheral walls of the main body or the lid, and the support can be provided at two locations near the optical cable connection terminal on the peripheral wall adjacent to both peripheral walls.

  In the CATV device casing, the support can be provided vertically from the inner surface to the bottom surface of the peripheral wall of the main body or lid.

  In the CATV device casing, the main body or the lid can be made of aluminum die cast, and the support can be molded integrally with the main body or the lid.

  In the CATV device casing, the support may be formed separately from the main body or the lid, and the support may be attached to the main body or the lid.

  In the CATV device casing, the support can be installed and fixed along a guide provided on the peripheral wall of the main body or the lid.

  In the CATV device casing, the support portion of the support can be a slope inclined downward from the inner surface of the peripheral wall toward the inside of the casing.

  In the CATV device casing, a fitting groove for arranging the tension member can be provided in the support portion of the support, and the fitting groove can be provided across the axial direction of the tension member inserted from the optical cable connection terminal.

  In the CATV device housing, the support portion of the support body can be a through-hole through which the tension member inserted from the optical cable connection terminal can pass.

(CATV equipment)
In a CATV device in which a main body and a lid are connected so as to be openable and closable, a housing is configured, an optical cable connection terminal is provided in either the main body or the lid, and a member required as a CATV device is built in the housing. The casing may be a CATV equipment casing provided with the support, and the panel covered in the casing may be provided with a recess that can avoid contact with the support.

  The CATV device using the CATV device casing of the present invention is designed to remove the tension member from the panel in the casing when removing various devices, units, etc. in the casing when performing functional expansion, maintenance inspection, repair, etc. There is no need to remove or remove the optical cable from the optical cable connection terminal, so that the trouble of the removal work is eliminated. Further, it is not necessary to reconnect the tension member or the optical cable after the work is completed.

The top view which shows CATV apparatus using the housing | casing for CATV apparatus of this invention, Comprising: An example of the state which opened the lid | cover attached to the main body so that opening and closing was possible 180 degree | times. The perspective view of the support body part of the housing | casing for CATV apparatus of this invention. Sectional drawing of the state which has arrange | positioned the tension member on the support body of the housing | casing for CATV apparatus of this invention, covered the pressing member on the tension member, and was screwed. It shows the pressing tool used to fix the tension member to the support portion of the CATV device casing of the present invention, (a) is a perspective view of the outer surface side, (b) is a perspective view of the inner surface side. is there. The perspective view which shows an example at the time of inserting a support body in the groove-shaped guide provided in the surrounding wall of the housing | casing for CATV apparatus of this invention, and attaching to a surrounding wall. The perspective view which shows an example at the time of arrange | positioning a tension member on the support body provided side by side on the surrounding wall of the housing | casing for CATV apparatus of this invention. The perspective view which shows an example when a tension member penetrates the inside of the through-hole opened to the support body provided in the surrounding wall of the housing | casing for CATV apparatus of this invention. 1 shows a pressing tool used to fix a tension member to a support portion of a CATV device casing according to the present invention, and (a) shows a V-shaped groove of the pressing tool and a V-shaped groove of the support. The front view at the time of pinching | interposing a tension member between groove | channels, (b) is a front view at the time of pinching | interposing a tension member between the W-shaped groove | channel of a pressing tool and the W-shaped groove | channel of a support body. The installation wiring explanatory drawing of a CATV apparatus. Explanatory drawing of the state which opened the lid body connected with the main body of the conventional CATV apparatus so that opening and closing was 180 degree | times.

(CATV equipment housing)
An example of the CATV device casing of the present invention is shown in FIGS. This embodiment is an example in which the CATV device is an optical transmission device, and an optical cable in which a tension member and an optical fiber are built in the outer shell is connected to an optical cable connection terminal of the optical transmission device.

  The optical transmission device housing 1 in FIG. 1 is configured by connecting an aluminum die-cast main body 2 and a lid 3 so as to be openable and closable at two connecting portions 4 in the same manner as an existing housing. . The main body 2 and the lid 3 can be detached from the connecting portion 4 as necessary. The main body 2 is provided with two wire attaching portions 5 for attaching (locking) to the messenger wire W. On the side surface, in addition to the optical cable connecting terminal 6 and the coaxial cable connecting terminal 7, a branch terminal and a power supply for individual power supply are provided. Various terminals 8 such as terminals and monitor terminals are also provided. An optical cable C containing a tension member is connected to the optical cable connection terminal 6 by an optical cable connector 9, and a coaxial cable E is connected to the coaxial cable connection terminal 7 by a coaxial cable connector (not shown) as in FIG. The The optical cable connector 9 is screwed and fixed to the optical cable connection terminal 6.

  As shown in FIG. 2, the main body 2 of FIG. 1 is provided with a support body 10 that supports the tension member T inserted into the main body 2 from the optical cable connection terminal 6 in the main body 2. This support 10 is molded integrally with the main body 2 when the main body 2 is molded by aluminum die casting. The support 10 is a vertically elongated protrusion, and is provided on the inner surface 12 of the peripheral wall 11 of the main body 2 in a vertical direction up to the bottom surface 13 (FIG. 3) of the main body 2, and protrudes from the inner surface 12 into the main body 2. Yes.

  The support 10 is an inner surface of the peripheral wall 11 adjacent to the peripheral wall 19 provided with the optical cable connection terminal 6, and is provided in the axial direction ahead of the tension member T inserted into the main body 2. It can be supported by. A support portion 14 that supports the tension member T is formed on the upper surface of the support 10. The support portion 14 is formed to be inclined downward from the inner surface 12 of the peripheral wall 11 toward the inside of the main body 2, and the main body 2 is suspended from the messenger wire W and the lid 3 is opened 180 degrees as shown in FIG. When the worker works toward the main body 2, the support portion (slope) 14 faces the worker side as shown in FIG. 3, and the tension member T can be easily placed on the support portion 14, and the pressing member 15 is placed thereon. It is easy to cover, and the presser 15 is easily screwed to the set hole 17 (FIG. 2) of the support portion 14 with the set screw 16. If possible, the support portion 14 may be inclined upward from the inside of the main body 2 toward the inner surface 12 of the peripheral wall 11, as opposed to the downward inclination. By using the upward inclination, there is an advantage that the tension member T arranged on the support portion 14 is less likely to slide off from the support portion 14 until the tension member T is put on the presser 15 and stopped by the set screw 16.

  The support part 14 is provided with a fitting groove 18 as shown in FIGS. As shown in FIG. 8A, the fitting groove 18 can be provided with a single V-shape as viewed from the side, or two grooves can be provided in a W shape. 8A and 8B, the width of the fitting groove 18 is wide enough to accommodate the tension member T, and the axial direction of the tension member T (the direction in which the tension member T is inserted into the main body 2). The tension member T is easily provided in the fitting groove 18 by being provided across the support portion 14. Further, when the tension member T is disposed in the fitting groove 18, the tension member T is fitted before the tension member T is screwed onto the support portion 14 by covering the tension member T with the presser 15. It is also surely supported in the joint groove 18 so that it is difficult to slip off.

  As shown in FIG. 2, the stop hole 17 is opened above and below the fitting groove 18. This stop hole 17 is for screwing the presser 15 as shown in FIG. As shown in FIG. 4A, the presser 15 has a downward U-shape. When the gap between the side plates 15a is made wider than the lateral width of the support portion 14 and is put on the support portion 14, the side plates 15a are formed. It is arranged on both outer sides of the support part 14. Further, when the cover groove 15b is provided on the both side plates 15a and is covered on the support portion 14, the cover groove 15b is covered on the tension member T as shown in FIGS. In the case of FIG. 8B, the covering groove 15b has the same W shape as the fitting groove 18 of FIG. 8B. By making it W-shaped, the tension member T is sandwiched between the central projection of the covering groove 15b and the central projection of the fitting groove 18, so that the tension member T is further clamped.

  The support 10 does not necessarily have to be on the axis of the tension member T, and may be offset from the axis of the tension member T to the inside or the outside of the main body 2. By setting the offset, the elastic force of the tension member T works so as to press against the support and the pressing member, so that the tension resistance of the tension member T is increased and the tensile strength is improved.

  In FIG. 1, since the optical cable connection terminals 6 are provided on both the left and right peripheral walls 19 of the main body 2, the support 10 is provided on both sides in the width direction of the peripheral wall 11 (on the left and right ends in FIG. 1). Even if the tension member T is inserted from the terminal 6, the tension member T can be screwed.

(Other Examples of Support)
The support body 10 shown in FIGS. 2 and 3 is made of aluminum die-cast integrally with the main body 2, but the one molded separately from the main body 2 is screwed to the inner surface 12 of the peripheral wall 11 of the main body 2. It can also be attached with an adhesive. As an example, as shown in FIG. 5, a groove-shaped guide 20 is provided vertically on the inner surface 12 of the peripheral wall 11 of the main body 2, and the elongated support molded separately from the main body 2 in the guide 20. The body 10 can be inserted and the support 10 can be attached to the inner surface 12 of the peripheral wall 11 of the main body 2 by screwing or bonding with an adhesive. The guide 20 may be other than a groove. For example, two protrusions having a width that is slightly wider than the width of the support 10 are provided on the inner surface 12 of the peripheral wall 11 in parallel and vertically, and between the protrusions. It is also possible to arrange the support 10 on the surface.

  In FIG. 2, one support 10 is provided on the inner surface 12 of the peripheral wall 11 of the main body 2, but it is also possible to provide two supports 10 side by side on the inner surface 12 of the peripheral wall 11 as shown in FIG. 6. In this case, since two places of one tension member T can be stopped by the support body 10, fixation of the tension member T is stabilized.

  As shown in FIG. 7, the support 10 is provided horizontally on the inner surface 12 of the peripheral wall 11, and a through hole 21 is opened in the width direction so that the tension member T can be passed through the through hole 21. Stop holes 17 are opened on the upper surface, and set screws 16 (FIG. 2) can be screwed into the respective stop holes 17 so that the tension member T can be fixed to the support 10. The upper surface of the support 10 in FIG. 7 can also be inclined downward toward the inside of the main body 2 or can be inclined upward from the inner side of the main body 2 toward the inner surface 12 of the peripheral wall 11. As shown in FIG. 1, the main body 2 is suspended from the messenger wire W, the lid body 3 is opened 180 degrees, and the operator works toward the main body 2, so that the upper surface of the support body 10 is formed. As shown in FIG. 3, the tension member T can be easily placed on the upper surface and the presser 15 can be easily put on the upper surface, and the presser 15 is screwed into the stop hole 17 on the upper surface with a setscrew 16. It becomes easy to stop. One stop hole 17 in FIG. 7 may be provided.

  The support 10 can also be provided at a place other than the peripheral wall 11. If possible, it can be provided on the inner surface of the peripheral wall 19 provided with the optical cable connection terminal 6 or at the corner portion of the peripheral wall 19 and the peripheral wall 11 adjacent thereto. In either case, the support 10 is protruded into the housing 1 so that the tension member T inserted into the main body 2 from the optical cable connection terminal 6 can be placed on the support 10.

  The shape, structure, attachment location, and the like of the support 10 may be other than those illustrated. When two or more supports 10 are provided, the shapes and structures of the supports 10 may be the same or different.

  The illustrated embodiment is a case where the optical cable connection terminal 6 is provided on the main body 2, but when the optical cable connection terminal 6 is provided on the lid body 3, the support body 10 is provided on the peripheral wall of the lid body 3. You can also. When the optical cable connection terminal 6 is provided on both the main body 2 and the lid 3, the support 10 can also be provided on both the main body 2 and the lid 3. In any case, the basics of the shape, structure, mounting position, etc. of the support 10 can be the same as those of the above-described embodiment shown in FIGS.

(CATV equipment)
An example of a CATV device according to the present invention is shown in FIG. In FIG. 1, the downstream optical signal input from the optical cable C to the optical transmission device is converted into an electric signal in the main body 2 of the above-described CATV device casing of the present invention as in the conventional CATV device. An O / E converter, an E / O converter that converts an upstream electrical signal input from the coaxial cable E to the optical transmission device into an optical signal, other devices, and the like are built in, and a panel L is put on them. The panel L is screwed to the main body 2, and various units 22 are mounted on the panel L, and optical wiring and electrical wiring necessary for these devices and the unit 22 are provided. Similarly to the conventional CATV device, the lid 3 also has a power circuit for supplying AC 30 / 60V superimposed on the coaxial cable E and the power supplied to the individual power supply terminals to the circuit in the housing 1 and other devices. Etc. are built-in. An optical cable C can be connected to the optical cable connection terminal 6 of the main body 2, a coaxial cable E (FIG. 8) can be connected to the coaxial cable connection terminal 7, and a branch cable G can be connected to the branch terminal.

  In the present invention, other devices, a unit 22, a circuit board, and the like can be provided on the main body 2 and the lid 3 as necessary. Also, the devices provided in the main body 2 can be provided in the lid 3, and the devices provided in the lid 3 can be provided in the main body 2. In this case, the optical cable connection terminal 6, the coaxial cable connection terminal 7, the branch terminal, and other terminals 8 provided in the main body 2 can be provided on the lid 3.

(Tension member and optical fiber wiring)
An example in which the tension member of the optical cable incorporating the tension member and the optical fiber is wired to the CATV device of the present invention as shown in FIG. 1 will be described below with reference to FIG.
1. As shown in FIG. 2, the tension member T and the optical fiber N are protruded from the front end of the outer sheath of the optical cable C. In FIG. 2, only one optical fiber N is shown for the sake of brevity, but there are usually many optical fibers N.
2. As shown in FIG. 2, the optical cable C is attached to the distal end portion of the optical cable C, and the tension member T and the optical fiber N are projected beyond the optical cable connector 9.
3. The optical cable connector 9 is screwed and connected to the optical cable connection terminal 6 attached to the peripheral wall 19 of the main body 2 so that the tension member T and the optical fiber N protrude into the main body 2.
4). The tension member T protruded into the main body 2 is disposed in the fitting groove 18 of the support portion 14 of the support 10 provided in the main body 2, and the support portion 14 from above is placed on the support portion 14 as shown in FIGS. 3), and the tension member T is fixed by the pressing tool 15 by screwing the pressing tool 15 into the fixing hole 17 of the support portion 14 as shown in FIG.
5. The optical fiber N inserted into the main body 2 is connected to the O / E converter, the optical fiber N, etc. in the main body 2. The connection can be performed using the optical cable connector 9 or the like, for example, as in the conventional example.

  The above description is an example in which the tension member T is built in the outer sheath together with the optical fiber N, but the present invention can also be used when the tension member T is provided outside the outer sheath of the optical cable N. . In that case, the tension member T is inserted into the optical cable connector 9 (FIG. 2) and protrudes to the tip side of the optical cable connector 9, and the optical cable connector 9 is screwed to the optical cable connection terminal 6 (FIG. 2). The protrusion can be protruded into the main body 2 (FIG. 2), and the protrusion can be fixed to the support 10 by screws or the like.

DESCRIPTION OF SYMBOLS 1 Case 2 Main body 3 Cover body 4 Connection part 5 Wire attachment part 6 Optical cable connection terminal 7 Coaxial cable connection terminal 8 Coaxial cable connection terminal (branch terminal etc.)
DESCRIPTION OF SYMBOLS 9 Optical cable connector 10 Support body 11 Perimeter wall 12 Inner surface of peripheral wall 13 Bottom surface of main body 14 Support part of support body 15 Presser 15a Presser side plate 15b Presser side plate pressing groove 16 Set screw 17 Stopping hole 18 Fitting groove 19 Optical cable Peripheral wall with connection terminal 20 Guide 21 Through hole 22 Unit A Optical transmission device B Optical cable connection terminal C Optical cable D Coaxial cable connection terminal E Coaxial (for trunk line) cable F Branch terminal G Coaxial (for branch) cable H Body I Cover J connection part K case L panel M set screw N optical fiber O optical cable connector P holder Q presser R set screw S extra length T tension member W messenger wire

Claims (12)

  A casing is constituted by a main body and a lid body that are connected so as to be openable and closable. The main body and the lid body have a bottom surface and a peripheral wall, and are in a box shape having an open side surface opposite to the bottom surface. In the case of a CATV device provided with an optical cable connection terminal, a support body is provided on the peripheral wall of the main body or the lid, which supports a tension member inserted from the optical cable connection terminal into the case near the optical cable connection terminal. A support for a CATV device, wherein the support member is provided so as to protrude from the inner surface of the peripheral wall into the case, and is provided in the axial direction of the tension member.   2. The CATV device casing according to claim 1, wherein one or more supports are provided on the same surface of the same peripheral wall.   3. The CATV device casing according to claim 1 or 2, wherein the support is provided on an inner surface of the peripheral wall adjacent to the peripheral wall provided with the optical cable connection terminal.   4. The CATV device casing according to claim 1, wherein the optical cable connection terminal is provided on two opposing peripheral walls of the main body or the lid, and the support is provided on the peripheral wall adjacent to both peripheral walls. A cabinet for CATV equipment, which is provided at two locations near an optical cable connection terminal.   5. The CATV device casing according to claim 1, wherein the support body is provided vertically from the inner surface to the bottom surface of the peripheral wall of the main body or the lid body. 6. body.   6. The housing for a CATV device according to claim 1, wherein the main body or the lid is made of aluminum die cast, and the support is molded integrally with the main body or the lid. A cabinet for CATV equipment.   7. The CATV device casing according to claim 1, wherein the support is molded separately from the main body or the lid and attached to the main body or the lid. Equipment casing.   8. The CATV device casing according to claim 7, wherein the support is installed and fixed along a guide provided on a peripheral wall of the main body or the lid.   9. The CATV device housing according to claim 1, wherein the support portion is a slope inclined downward from the inner surface of the peripheral wall toward the inside of the housing. Case for CATV equipment.   10. The CATV device housing according to claim 1, further comprising a fitting groove for arranging a tension member in a support portion of the support, wherein the fitting groove is a tension inserted from an optical cable connection terminal. A casing for a CATV device, which is provided so as to cross the member in the axial direction.   9. The CATV device housing according to claim 1, wherein the support portion is a through hole that can penetrate a tension member inserted from an optical cable connection terminal. Case for CATV equipment.   In a CATV device in which a main body and a lid are connected so as to be openable and closable, a housing is configured, an optical cable connection terminal is provided in either the main body or the lid, and a member required as a CATV device is built in the housing. The case is a case for a CATV device according to any one of claims 1 to 11, wherein a panel covered in the case is provided with a recess capable of avoiding contact with the support. CATV equipment.

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