JP2013109275A - Transfer metal fitting for opgw(optical ground wire) connection box and method for handling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assist the transfer of an OPGW(OPtical Ground Wire) connection box by using the engagement member of the lid body of the OPGW connection box, and to perform a transfer work in a state that the OPGW connection box is stabilized.SOLUTION: The transfer metal fitting for an OPGW connection box includes: a set of support flag bars 10 and 20 having long hole parts 12, 13, 22 and 23 through which bolts 808, 807, 803, and 804 projected to an opposite face to the mounting face side of an OPGW connection box 80 can be inserted; and nuts 408, 407, 403 and 404 to be engaged with the bolts 808, 807, 803 and 804 of the OPGW connection box inserted into the long hole parts 12, 13, 22 and 23 of the support flat bars 10 and 20 for temporarily fixing the OPGW connection box. One end of each of the support flat bars 10 and 20 to which the OPGW connection box has been temporarily fixed has round hole parts 16 and 26 for suspension. Thus, the OPGW connection box can be transferred by suspending the round hole parts 16 and 26 of the support flat bars 10 and 20 to which the OPGW connection box has been temporarily fixed.

Description

  The present invention relates to a transfer aid for assisting the transfer of an OPGW connection box for connecting an optical ground wire (hereinafter referred to as OPGW) in a steel tower, and when moving it up and down. It is related with the transfer metal fitting of OPGW connection box applicable to the above, and its handling method.

  Conventionally, an overhead ground wire is provided between steel towers to protect the transmission and distribution line from lightning strikes. On the other hand, with the recent development of information communication technology, large-capacity optical fiber communication cables are often used. The overhead ground wire provided on the steel tower is laid for a long distance. For this reason, an optical fiber composite ground wire (OPGW) having a structure in which an overhead ground wire and an optical fiber communication cable are combined is used. An OPGW connection box is provided on the steel tower, and the OPGW is connected by the OPGW connection box.

  The OPGW junction box is often exposed to harsh natural environments or vibrations from steel towers, etc., and is often handled in high places where the working environment is poor. For this reason, the OPGW junction box has excellent waterproofness, vibration resistance, and good workability.

  By the way, when the OPGW is connected to the OPGW and the optical communication can be operated, and the OPGW connection box currently attached to the tower is moved from the lower part to the upper part of the tower. The following operations are performed. Since the OPGW connection box does not have a hanging hole for attaching a rope or the like, after removing the bolted OPGW connection box from the steel tower, Relocation work, such as tying up and winding up with a rope, is performed.

  Also, at the same time that the OPGW connected to the lower part of the OPGW connection box is weighted, and the OPGW connected to the lower part of the OPGW connection box does not come out of the holding bracket of the connection box due to the weight, every few meters in the tower The arranged worker is performing the transfer work while holding the OPGW connection box by hand. The suspension load of the OPGW connection box at that time is the total weight of the weight of the connection box itself and the weight of the OPGW connected to the gripping metal fitting. The operator interposes and exchanges the OPGW connection box and the OPGW so that the OPGW does not contact the steel tower.

  In connection with this type of OPGW connection box, according to the connection box for OPGW described in Patent Document 1, when connecting an existing optical fiber of OPGW and an external optical cable, A third grip portion and a storage tray are provided. The case main body has first and second drawing openings. The cut end of the OPGW is drawn into the first drawing port. An external optical cable is drawn into the second drawing port. The first gripping part is disposed in the case main body and grips the front end part of the OPGW drawn from the first lead-in port.

  The second grip portion is disposed in the case body and grips an external optical cable drawn from the second lead-in port. In the case body, the end portions of the cut OPGW are connected to each other at the tip portion leaving an extra length. The storage tray is disposed in the case body and stores the optical fiber. Based on these assumptions, the case main body was attached to the support line by the third gripping portion. When the connection box for OPGW is configured in this manner, the existing optical fiber of OPGW can be connected to the optical fiber of the external optical cable at an arbitrary position.

  Further, in relation to the OPGW connection box mounting tool, according to the mounting tool for the optical cable connection box for wound type OPGW described in Patent Document 2, the T-shaped base, the support rod, the gripping tool, and the nut are provided. The T-shaped substrate has a horizontal bar portion and a vertical bar portion. Bolt holes for attaching the optical cable connection box for the wound type OPGW are provided at predetermined positions of the horizontal bar portion of the T-shaped base. The support bar is fixed in parallel with the horizontal bar part at a predetermined position of the vertical bar part of the T-shaped base. The gripping tool is loosely fitted on both sides of the vertical bar portion of the support bar, and grips a predetermined part of the steel tower. On the premise of this, the nut presses the gripping tool inwardly and is screwed on the outside of the gripping tool. If the OPGW connection box attachment is configured in this way, the OPGW optical cable connection box can be attached to the large angle of the steel tower, and the attachment work can be easily performed.

  Further, in connection with the OPGW connection box, according to the connection box for OPGW described in Patent Document 3, the left and right two of the OPGW used attached to the armature of the steel tower or the top of the tower are crossed, When the OPGW is gripped and guided, a base, a hook-shaped clasp, first and second nuts, first and second bent plates, and a gripping portion are provided. . The base is formed in an L-shape along the outer surface of the L-shaped steel constituting the armature or the like of the steel tower, and thread grooves for screwing nuts are formed at both ends. The clasps are inserted into both ends of the base so as to sandwich both L-shaped steel sleeves. The first nut is adapted to fasten each clasp inserted at both ends of the base.

  The first bent plate has an L-shaped plate shape including a base portion and a bent portion. Bolt holes are formed at both ends of the first bent plate, and one end of the base is inserted into one bolt hole. The second nut is configured to clamp the first bent plate between the first nut and the second nut. The second bent plate is formed with bolt holes at both ends, and is connected to the first bent plate by fixing one bolt hole and the other bolt hole of the first bent plate with bolts and nuts. On the premise of this, the gripping part is attached to the other bolt hole of the second bent plate with bolts and nuts, and the OPGW is sandwiched and fixed. When the connection box for OPGW is configured in this way, when the OPGW is pulled down to the relay box, the interference / contact of the OPGW crossed on the armature of the steel tower can be avoided.

  Further, in relation to the OPGW connection box, the optical cable connection box described in Patent Document 4 includes a box, a support member, a through groove, and a cable fixing portion. The box has an introduction hole in the lower surface for introducing two optical cables. A box accommodates the excess part of the optical cable and other optical cable which were mutually connected inside. The support member is attached to the box so as to protrude below the box.

  The through groove is continuously formed in the support member in a direction intersecting with each optical cable. The cable fixing portion is detachably attached by selecting an arbitrary position of the through groove, and fixes each optical cable to the support member. Based on these assumptions, the optical cable connection box is attached to the plate-like portion of the leg of the transmission line tower. If the connection box for OPGW is configured in this way, it is possible to prevent the lateral pressure from being applied to each optical cable and to connect the optical cable reliably.

Japanese Patent Laying-Open No. 2008-233695 (FIG. 1 on page 6) Japanese Patent Application Laid-Open No. 08-015532 (Page 3 FIG. 1) Japanese Patent Laying-Open No. 2007-110882 (FIG. 1 on page 5) Japanese Patent Laying-Open No. 2008-299050 (FIG. 1 on page 4)

By the way, according to the conventional method of handling the OPGW junction box, there are the following problems.
i. According to the optical cable connection box as shown in Patent Document 4, since there is no place to attach the rope for relocation work, etc., after removing the optical cable connection box, it becomes a hanging work by lashing and a tow rope. There is a problem that the relocation work in an unstable state becomes long.

  ii. It is difficult to attach a rope or the like while holding the OPGW connection box removed from the steel tower. If an impact is applied to the OPGW by tilting or dropping the OPGW connection box when the rope is attached, the optical communication will be disturbed. This increases the risk of information communication failures.

  iii. The OPGW pulled out from the vicinity of the holding fitting at the bottom of the OPGW connection box is often held by an operator. However, it is very difficult for an operator to keep holding the vicinity of the grip metal fittings on which the trouble is likely to occur on the steel tower at all times.

  iv. Incidentally, if the force such as the hanging load is concentrated in the vicinity of the holding fitting of the OPGW connection box during the winding work with the looper rope, the probability of occurrence of a defect near the holding fitting increases. Further, there is a possibility that a force of weight, twisting, and bending is applied near the base of the holding fitting. In the worst case, there is a concern that a problem such as the OPGW coming off from the gripping metal may occur.

  The above-mentioned problems are that the existing OPGW connection box is pulled down from the transmission tower to the ground, the new OPGW connection box is pulled up from the ground to the transmission line tower, the installation position of the existing OPGW connection box in the tower If there is a request to change the OPGW connection box found in Patent Document 1 or Patent Document 3, even if the OPGW connection box found in Patent Document 2 is attached, the OPGW connection box The current situation is that the relocation work has not been completed with the box stabilized.

  Therefore, the present invention solves such a problem, and by using the engaging member of the lid of the OPGW connection box, it is possible to assist the transfer of the OPGW connection box during the transfer and the OPGW. It is an object of the present invention to provide an OPGW connection box transfer metal fitting and a method for handling the same so that the transfer work can be performed with the connection box stabilized.

  In order to solve the above-mentioned problem, the transfer fitting of the OPGW connection box according to claim 1 is a first fitting capable of inserting an engagement member protruding from a surface opposite to the mounting surface side of the OPGW connection box. A pair of carriers having holes, and an engaged member that is engaged with and temporarily fixed to the engagement member of the OPGW connection box inserted through the first hole of the carrier, A second hole for lifting is provided at one end of each of the support bodies to which the OPGW connection box is temporarily fixed.

  According to the transfer fitting for the OPGW connection box according to claim 1, it is provided with a pair of carriers and engaged members, and each of the carriers protrudes on the surface opposite to the mounting surface side of the OPGW connection box. A first hole through which the engaged member is inserted. The engaged member is engaged with and temporarily fixed to the engaging member of the OPGW connection box inserted through the first hole of the carrier. Based on these assumptions, a second hole for lifting is provided at one end of each carrier to which the OPGW junction box is temporarily fixed.

  With this configuration, the OPGW connection box can be moved by lifting the second hole of each carrier to which the OPGW connection box is temporarily fixed. Thereby, it becomes possible to perform a lifting operation or the like using the carrier attached to the side other than the attachment surface side of the OPGW connection box.

  The transfer fitting of the OPGW connection box according to claim 2 includes a first bridging member arranged and fixed so as to bridge an upper end portion of the one pair of carriers in the first aspect. A third hole portion having a long hole shape is provided at a predetermined position of the bridging member, and is a surface opposite to the mounting surface side of the OPGW connection box, and is inserted through the engaging member protruding upward. It is characterized by being made possible.

  According to a third aspect of the present invention, there is provided the transfer fitting for the OPGW connection box according to the second aspect, wherein a hook member for temporary fixing is attached to the third hole portion.

  According to a fourth aspect of the present invention, there is provided the transfer fitting for the OPGW junction box according to the second aspect, further comprising an intermediate member arranged and fixed so as to bridge an intermediate portion of the pair of carriers. A long hole-like fourth hole portion is provided at a position, which is a surface opposite to the mounting surface side of the OPGW connection box, and is capable of inserting an engaging member protruding downward. It is characterized by this.

  The transfer fitting of the OPGW connection box according to claim 5 includes a second bridging member arranged and fixed so as to bridge the lower end portion of the pair of carriers in claim 2, A fixing member for individually fixing cables drawn from the OPGW connection box is attached to a predetermined position of the bridging member.

  The handling method of the transfer fitting of the OPGW connection box according to claim 6 has a first hole portion through which an engagement member protruding on the surface opposite to the mounting surface side of the OPGW connection box can be inserted, And a pair of carriers having a second hole for lifting at one end of each, and an engagement member of the OPGW connection box inserted through the first hole of the carrier. A step of attaching and temporarily fixing the OPGW connection box to a transfer fitting provided with an engaged member to be temporarily fixed; and a second hole of each carrier of the transfer fitting to which the OPGW connection box is temporarily fixed It has the process of lifting a part and moving the said OPGW junction box.

  According to the method for handling the transfer fitting of the OPGW connection box according to claim 6, the OPGW connection box is transferred by lifting the second hole of each carrier of the transfer fitting to which the OPGW connection box is temporarily fixed. become. With this configuration, by attaching the transfer metal fitting to the OPGW connection box first, it is possible to maintain the state in which the second hole is connected with the looper until the OPGW connection box is fixed to the steel tower.

  According to the transfer fitting of the OPGW connection box according to the first aspect, the second hole for lifting is provided at one end of each carrier to which the OPGW connection box is temporarily fixed.

  With this configuration, the OPGW connection box can be moved by lifting the second hole of each carrier to which the OPGW connection box is temporarily fixed. As a result, lifting work or the like can be performed using a carrier attached to a side other than the mounting surface side of the OPGW connection box. Therefore, the OPGW connection box can be connected to the OPGW connection box without obstructing the suspension source. The box can be easily attached to a steel tower or the like.

  According to the transfer fitting of the OPGW connection box according to claim 2, since the third bridging hole is provided in the first bridging member, when the OPGW connection box is transferred, the upper side of the OPGW connection box is Even if the engaging members are arranged at different intervals, they can be attached with some margin.

  According to the transfer fitting of the OPGW connection box according to claim 3, since the hook member is attached to the third hole provided in the first bridging member, the transfer fitting is connected to the OPGW when the OPGW connection box is transferred. The transfer metal fitting can be temporarily supported on the steel tower by the hook member until it is temporarily fixed to the box.

  According to the transfer fitting of the OPGW connection box according to claim 4, since the long hole-shaped fourth hole is provided in the intermediate member, the lower side of the OPGW connection box can be fixed when the OPGW connection box is transferred, And even if the arrangement | positioning space | interval of an engaging member differs, it can attach with some margin.

  According to the transfer fitting of the OPGW connection box according to claim 5, since the fixing member is attached to the second bridging member and the cables drawn out from the OPGW connection box are individually fixed, compared with the case where the fixing member is not used. Thus, even when an external force such as weight, twist or break is applied near the root of the OPGW connection box, stress such as weight, twist or break applied to the OPGW drawn from the OPGW connection box can be avoided by the fixing member. . In addition, since a stable state of the OPGW connection box can be maintained, the occurrence of communication failure can be prevented. In addition, it is possible to avoid the occurrence of problems such as disconnection of OPGW from the holding fitting of the OPGW connection box.

  According to the method for handling the transfer fitting of the OPGW connection box according to claim 6, the OPGW connection box is transferred by lifting the second hole of each carrier of the transfer fitting to which the OPGW connection box is temporarily fixed. become.

  With this configuration, by attaching the transfer metal fitting to the OPGW connection box first, it is possible to maintain the state in which the second hole is connected with the looper until the OPGW connection box is fixed to the steel tower. As a result, the OPGW connection box can be removed from the steel tower while a load is applied to the return rope, so that the transfer work can be performed while the OPGW connection box is stable.

It is a perspective view showing an example of composition of transfer auxiliary frame 100 of OPGW junction box 80 as an embodiment concerning the present invention. (A) And (B) is the front view and X1-X1 arrow sectional drawing which show the protection structural example of hole parts, such as the holding | maintenance flat bar 10. FIG. FIG. 5 is a perspective view illustrating a configuration example of a hook member 70. 4 is a front view showing a configuration example of an OPGW connection box 80. FIG. It is a perspective view which shows the assembly example (the 1) of the transfer assistance frame 100. FIG. It is a front view which shows the assembly example (the 2) of the transfer assistance frame 100. (A) And (B) is a front view which shows the structural examples, such as a fixed clamp 60a, and the function example. 6 is a side view showing an example of attachment of the fixing member 60 to the transfer assist frame 100. FIG. (A) And (B) is a side view which shows the example of attachment of the OPGW connection box 80 with respect to the transfer auxiliary | assistant frame 100 (the 1). It is a front view which shows the example (the 2) of attachment of the OPGW connection box 80 with respect to the transfer assistance frame 100. It is a process flowchart which shows the handling example (the 1) of the transfer assistance frame 100 at the time of connection box transfer. It is a process flowchart which shows the handling example (the 2) of the transfer assistance frame 100 at the time of connection box transfer. It is a process flowchart which shows the handling example (the 3) of the transfer assistance frame 100 at the time of connection box transfer.

  Hereinafter, the transfer fitting of the OPGW connection box as an embodiment according to the present invention and a method for handling the same will be described with reference to the drawings. The transfer auxiliary frame 100 shown in FIG. 1 constitutes an example of a transfer bracket. When the OPGW connection box 80 for connecting an optical fiber composite overhead ground wire (hereinafter referred to as OPGW) is transferred in the steel tower 200, the OPGW connection box 80 is used. When moving up and down between the steel tower 200 and the ground, it is suitable for application to a transfer auxiliary frame that assists the transfer and transfer. The OPGW connection box 80 has a length of L [cm], a height of H [cm], and a thickness of D [cm]. The weight is W [kg].

  The transfer assisting frame 100 is configured to include supporting flat bars 10 and 20, bridging flat bars 30 and 50, and an intermediate flat bar 40. The support flat bars 10 and 20 constitute an example of a set of support bodies. For example, the OPGW connection box 80 has a length of about L = 80 [cm], a height of about H = 60 [cm], and a thickness. Is about D = 20 [cm] and the weight is about W = 15 to 20 [kg], it has an elongated shape with a thickness of about 4 mm to 8 mm, a width of about 40 mm to 80 mm, and a length of about 1000 mm to 1200 mm. Made flat steel (flat bar) is used.

  The one supporting flat bar 10 includes, for example, five elongated holes (hereinafter referred to as elongated holes 11, 12, 13, 14, 15) in the vertical direction and one round hole. (Hereinafter referred to as a round hole 16).

  The long hole portions 12 and 13 constitute an example of the first hole portion, and have a size that allows the engagement member on one side protruding from the surface opposite to the mounting surface side of the OPGW connection box 80 to be inserted. Have. The engaging members are, for example, eight bolts 801 to 808 that close the lid 81 (see FIG. 4) in the OPGW connection box 80. The hole widths of the long hole portions 11 to 15 of the carrying flat bar 10 are different in the arrangement interval of the engaging members (bolts 801 to 808) of the OPGW connection box 80 and the bolt diameters. The opening is wide (thick) with some margin. Thereby, versatility can be given to the transfer auxiliary frame 100.

  The long hole portions 11, 14, and 15 constitute a fixed portion on the left side when the transfer assist frame 100 is assembled. The round hole portion 16 constitutes an example of a second hole portion. When the OPGW connection box 80 is transferred, the round hole portion 16 is used as one hanging hole portion of the transfer auxiliary frame 100 to which the OPGW connection box 80 is temporarily fixed. The When the OPGW connection box 80 is suspended from the round hole portion 16, a rope for lifting the crane (or a rope) may be attached.

  The other holding flat bar 20 also has five elongated holes 21, 22, 23, 24, 25 and one round hole 26 in the vertical direction. The long hole portion 22 and the long hole portion 23 also constitute an example of the first hole portion, and the other side engaging member (bolt 803, protruding from the surface opposite to the mounting surface side of the OPGW connection box 80). 804) can be inserted.

  The long hole portions 21, 24, and 25 constitute a fixing portion on the right side when the transfer assist frame 100 is assembled. The round hole portion 26 constitutes an example of a second hole portion. When the OPGW connection box 80 is transferred, the round hole portion 26 is suspended on the other side of the transfer auxiliary frame 100 to which the OPGW connection box 80 is temporarily fixed together with the round hole portion 16. Used as a hole for A rope is attached to the round hole portion 26 in the same manner as the round hole portion 16 when the OPGW connection box 80 is suspended.

  The cross-linking flat bar 30 constitutes an example of a first cross-linking member, and is arranged and fixed so as to cross-link the upper end portions of the pair of supporting flat bars 10 and 20. As the bridging flat bar 30, for example, a flat steel having an elongated shape having a thickness of about 4 mm to 8 mm, a width of about 40 mm to 80 mm, and a length of about 800 mm to 1000 mm is used.

  The bridging flat bar 30 has long hole portions 31, 32, 33, and 34 at predetermined positions. The long hole portions 32 and 33 constitute an example of a third hole portion, and are inserted through the upper engaging members (bolts 801 and 802) protruding from the surface opposite to the mounting surface side of the OPGW connection box 80. It has a possible size.

  The hole widths of the long hole portion 32 and the long hole portion 33 are different to some extent in the same manner as the supporting flat bars 10 and 20 in order to cope with this because the arrangement interval of the engaging members of the OPGW connection box 80 differs depending on the manufacturer. , Have a margin. Thereby, versatility can be given to the transfer auxiliary frame 100.

  The long hole portions 31 and 34 constitute an upper fixed portion when the transfer assist frame 100 is assembled. The supporting flat bar 10 and the bridging flat bar 30 are fixed with bolts 101 and nuts 102 using the long hole portion 11 and the long hole portion 31 at the upper left portion thereof. The supporting flat bar 20 and the bridging flat bar 30 are fixed with bolts 201 and nuts (not shown) using the long hole portion 21 and the long hole portion 34 on the upper right side thereof.

  An intermediate flat bar 40 is attached between the cross-linked flat bars 30 and 50 on the lower side of the cross-linked flat bar 30 described above. The intermediate flat bar 40 is arranged and fixed so as to bridge the intermediate part of the pair of supporting flat bars 10 and 20. As the intermediate flat bar 40, for example, a flat steel having an elongated shape with a thickness of about 4 mm to 8 mm, a width of about 40 mm to 80 mm, and a length of about 800 mm to 1000 mm is used.

  The intermediate flat bar 40 has long hole portions 41, 42, 43, 44. The long hole portions 42 and 43 constitute an example of a fourth hole portion, and are inserted through lower engaging members (bolts 805 and 806) protruding from the surface opposite to the mounting surface side of the OPGW connection box 80. It has a possible size. The hole widths of the long hole portion 42 and the long hole portion 43 are different to some extent in the same manner as the bridging flat bar 30 in order to deal with this because the arrangement interval of the engaging members of the OPGW connection box 80 differs depending on the manufacturer. Is given. Thereby, versatility can be given to the transfer auxiliary frame 100. The intermediate flat bar 40 functions to prevent the supporting flat bars 10 and 20 from opening outward and to reinforce the transfer assist frame 100.

  The long hole portions 41 and 44 constitute an intermediate fixing portion when the transfer assist frame 100 is assembled. The left and right portions of the support flat bar 10 and the intermediate flat bar 40 are fixed with bolts 103 and nuts 104 using the long hole portions 14 and the long hole portions 41. The long hole portion 22 and the long hole portion 44 are used on the right side portions of the support flat bar 20 and the intermediate flat bar 40 and are fixed with bolts 203 and nuts 204.

  Below the intermediate flat bar 40, a bridging flat bar 50 constituting an example of the second bridging member is attached, and is arranged and fixed so as to bridge the lower ends of the carrying flat bars 10, 20. As the bridging flat bar 50, for example, a flat steel having an elongated shape having a thickness of about 4 mm to 8 mm, a width of about 40 mm to 80 mm, and a length of about 800 mm to 1000 mm is used. The bridging flat bar 50 has round hole portions 51 and 53 (see FIG. 5) and a long hole portion 52. The long hole portion 52 is elongated so as to be elongated at a predetermined position of the bridging flat bar 50, for example, between the round hole portions 51 and 53, so as to constitute a hole portion for component common attachment. A plurality of fixed clamps 60 a to 60 d as described in FIGS. 5, 7, and 8 are attached to the long hole portion 52.

  The round hole portions 51 and 53 of the bridging flat bar 50 constitute a lower fixing portion when the transfer auxiliary frame 100 is assembled. At the lower left part of the supporting flat bar 10 and the bridging flat bar 50, the long hole 15 and the round hole 51 are used and fixed with a bolt 105 and a nut (not shown). It is fixed with bolts 205 and nuts (not shown) using the long hole portions 25 and the long hole portions 53 at the lower right portions of the support flat bar 20 and the bridging flat bar 50.

  The material of the supporting flat bars 10 and 20, the bridging flat bars 30 and 50, and the intermediate flat bar 40 is not limited to flat steel, and these flat bars are made of stainless steel (SUS) or an aluminum flat plate. You may use what was processed.

  Here, with reference to FIG. 2A and FIG. 2B, examples of protective structures such as the long hole portions 11 to 15 and the round hole portion 16 of the carrying flat bar 10 will be described. According to the transfer assist frame 100 of this example, since the bolts 801 to 808 of the OPGW connection box 80 are used, it is necessary to devise such that the threads of the bolts 801 to 808 are not crushed.

  Therefore, the long hole portion 11 such as the supporting flat bar 10 shown in FIG. 2A is provided with a protective member 11a for protecting the inner periphery of the long hole portion. The round hole portion 16 is provided with a protective member 16a that protects the inner circumference of the round hole portion. Silicon rubber rubber packing is used for the protection members 11a and 16a. Of course, it is not limited to rubber packing, and the protective members 11a and 16a may be made of a material that does not crush the threads of the bolts 801 to 808 of the OPGW connection box 80, for example, resin packing.

  As shown in FIG. 2B, the protective members 11 a and 16 a have a bushing structure that covers the cut surfaces of the front and back surfaces at the long hole portion 11 and the round hole portion 16 of the carrying flat bar 10. The bushing structure allows the threads of the bolts 801 to 808 to be maintained in a predetermined shape.

  In addition, the long hole parts 21-25 of the carrying flat bar 20, the round hole part 26, etc., the long hole parts 31-34, etc. of the bridging flat bar 30, the long hole parts 41-44, etc. of the intermediate flat bar 40, and the bridging flat Examples of protective structures such as the long hole portions 11 to 15 and the round hole portion 16 of the supporting flat bar 10 are also applied to the long hole portion 52 and the round hole portions 51 and 53 of the bar 50, but the description thereof is omitted. To do.

  Next, a configuration example of the hook member 70 will be described with reference to FIG. The hook member 70 shown in FIG. 3 is a working member for temporarily fixing and fixing the transfer auxiliary frame 100 to the steel tower 200 or the like when the OPGW connection box 80 is transferred. The hook member 70 for temporary placement (temporary fastening) includes, for example, a pair of hook fittings 70a and 70b having an inverted “shi” shape. Each hook metal fitting 70a, 70b is provided with holes 701, 702 for engagement.

  For example, the hook fitting 70 a is attached to the long hole portion 32 of the bridging flat bar 30 of the transfer assisting frame 100 using the hole portion 701, and the long hole portion 33 of the bridging flat bar 30 is used using the hole portion 702. The hook metal fitting 70b is attached to. The hook member 70 is removed when the transfer assist frame 100 is attached to the OPGW connection box 80. By using this hook member 70, the transfer auxiliary frame 100 can be temporarily placed on the steel tower 200 or the like when the OPGW connection box 80 is moved inside the steel tower 200, etc., leading to an improvement in efficiency during the transfer work.

  Here, a configuration example of the OPGW connection box 80 will be described with reference to FIG. When the OPGW connection box 80 shown in FIG. 4 is viewed from the front, for example, the lid 81 is closed with eight nuts 811 to 818 corresponding to the eight bolts 801 to 808, respectively. Each side of the lid 81 is provided with two U-grooves each having a groove width slightly wider than the bolt diameter.

  Eight bolts 801 to 808 are provided on each side of the outer peripheral surface of the casing 85 (box body) as shown in FIG. 9A (shown by broken lines in FIG. 4). It is attached corresponding to. The side of the housing 85 such as the bolt 801 is a rotating annular portion, and is freely engaged with a shaft support portion (see shaft support portions 845 and 846 shown in FIGS. 9A and 9B) in a direction orthogonal to the screw screw shaft. Are combined. For example, in the bolt 801, when the nut 811 is loosened, the nut 811 is configured to come out from the U groove portion of the lid portion 81 in a state where the nut 811 is screwed to the bolt 801 with respect to the shaft support portion. .

  When removing the lid 81 from the housing 85, the eight nuts 811 to 818 are loosened. Each of the nuts 811 to 818 is operated so as to come out from each U groove portion of the lid portion 81 in a state where the nuts 811 to 818 are screwed into the corresponding bolts 801 to 808. Thereby, the cover part 81 can be removed from the housing 85 (box body). Since the nut 811 is handled in a state of being screwed to the bolt 801, the length of the nut 811 is set to be, for example, about twice to three times the height of the nut 811 (see FIG. 9).

  In this example, attachment piece members 82 and 83 are provided on the left and right sides of the casing 85, and are used when the OPGW connection box 80 is attached to the steel tower 200 or the like. The mounting piece member 82 is provided with a set of round hole portions 821 and 822, and the mounting piece member 83 is provided with a set of round hole portions 831 and 832.

  On the left side of the OPGW connection box 80, for example, a U-shaped bolt (not shown) or the like is attached to a component of the steel tower 200, and the ends of the U-shaped bolt are passed through the round hole portions 821 and 822 and fastened with nuts. Similarly, on the right side of the OPGW connection box 80, a U-shaped bolt or the like (not shown) is attached to a component of the tower 200, and the end of the U-shaped bolt is passed through the round hole portions 831, 832 and fastened with a nut. To do. Thereby, the OPGW connection box 80 is attached to the steel tower 200 or the like. Below the housing 85, OPGW grips 84 to 87 are provided, and four optical fiber composite ground wires (hereinafter referred to as OPGW # 1 to # 4) as shown in FIG. 10 are connected.

  Subsequently, an assembly example of the transfer assisting frame 100 will be described with reference to FIGS. In this example, the length shown in FIG. 4 is about L = 80 [cm], the height is about H = 60 [cm], the thickness is about D = 20 [cm], and the weight is W = 15. It is assumed that the transfer auxiliary frame 100 applicable to transfer of the OPGW connection box 80 of about ˜20 [kg] is assembled.

  First, two supporting flat bars 10, 20, two bridging flat bars 30, 50, one intermediate flat bar 40 and four fixed clamps 60a, 60b, 60c, 60d shown in FIG. 5 are prepared. For the supporting flat bars 10 and 20, for example, an elongated iron plate (hereinafter referred to as a sheet metal material) having a thickness of about 5 mm, a width of about 40 mm, and a length of about 1000 mm is used.

  At the predetermined position of the sheet metal material, for example, at intervals of the bolts 803, 804807, 808, etc. of the OPGW connection box 80 shown in FIG. The long hole is opened using a drilling machine, a laser processing machine, or the like. At the time of this opening processing, it is preferable to place an R shape on the cut surface of the inner peripheral edge of the hole. The hole at that time is formed with a diameter of 12 mm + a margin.

  The five long hole-shaped hole portions become the long hole portions 11, 12, 13, 14, and 15. At the same time, a round hole portion 16 is formed on the upper end portion using a drilling machine or the like. Thereby, the carrying | support flat bar 10 is formed. The support flat bar 20 is formed in the same manner. With respect to the support flat bar 20, the five long hole-shaped hole portions become the long hole portions 21, 22, 23, 24, and 25. At the same time, a round hole 26 having a diameter of 12 mm and a margin is formed using a drilling machine or the like at its upper end.

  For the bridging flat bars 30, 50 and the intermediate flat bar 40, for example, an elongated iron plate (hereinafter referred to as a sheet metal material) having a thickness of about 5 mm, a width of about 40 mm, and a length of about 800 mm is used. The cross-linking flat bar 30 and the intermediate flat bar 40 are arranged at predetermined positions of the sheet metal material, for example, in the lateral direction at an arrangement interval of the bolts 801, 802, 805, 806, etc. of the OPGW connection box 80 shown in FIG. Open a long hole. The long hole is opened using a drilling machine, a laser processing machine, or the like. At the time of this opening processing, it is preferable to place an R shape on the cut surface of the inner peripheral edge of the hole.

  As for the bridging flat bar 50, the round hole portions 51 and 53 are opened at a predetermined position of the sheet metal material, for example, the left and right end portions shown in FIG. A long and narrow hole portion is formed in a region between the round hole portions 51 and 53. This elongated long hole is a long hole 52 for attaching the fixing member. Even in this case, it is preferable to place an R shape on the cut surface of the inner peripheral edge of the hole. These supporting flat bars 10 and 20, cross-linked flat bars 30 and 50, and intermediate flat bar 40 are preferably subjected to rust prevention treatment in consideration of weather resistance. For example, these processed flat bar materials may be plated with zinc in a galvanizing bath.

  When these supporting flat bars 10 and 20, bridged flat bars 30 and 50, and intermediate flat bar 40 are prepared, the supporting flat bar 10 and the bridged flat bar 30 are used by using bolts 101 and nuts 102 on one side thereof. And fix. For example, the bolt 101 is inserted through the long hole portion 11 of the supporting flat bar 10 from the long hole portion 31 on the back surface side of the bridging flat bar 30 at the left upper portion thereof, and the end portion of the bolt 101 on the front surface side of the supporting flat bar 10. The nut 102 is fastened. For example, a hexagonal bolt having a length of about 20 mm and a bolt diameter of 12 mm (M12) is used as the bolt 101. As the nut 102, an M12 hexagonal nut is used. Both bolts and nuts are preferably galvanized.

  Next, the carrying flat bar 10 and the intermediate flat bar 40 are fixed using bolts 103 and nuts 104 on one side thereof. For example, the bolt 103 is inserted on the left side from the long hole portion 41 on the back surface side of the intermediate flat bar 40 through the long hole portion 14 of the carrying flat bar 10, and the nut is attached to the end of the bolt 103 on the surface side of the carrying flat bar 10. 104 is fastened. As the bolt 103, a hexagonal bolt having a length of about 20 mm and a bolt diameter of 12 mm (M12) is used. As the nut 104, an M12 hexagon nut is used.

  Further, the supporting flat bar 10 and the bridging flat bar 50 are fixed using bolts 105 and nuts 106 on one side thereof. For example, the bolt 105 is inserted in the lower left portion of the bridge flat bar 50 from the round hole portion 51 on the back surface side through the elongated hole portion 15 of the carrying flat bar 10, and the nut is attached to the end of the bolt 105 on the surface side of the carrying flat bar 10. Fasten at 106. As the above-described bolts 101, 103, 105, hexagon bolts having a length of about 20 mm and a bolt diameter M12 are used. As the nuts 102, 104, and 106, M12 hexagon nuts are used.

  Next, the carrying flat bar 20 and the bridging flat bar 30 are fixed using bolts 201 and nuts 202 on the other side. For example, the bolt 201 is inserted through the long hole portion 21 of the supporting flat bar 20 from the long hole portion 34 on the back surface side of the bridging flat bar 30 at the upper left side, and the end portion of the bolt 201 on the front surface side of the supporting flat bar 20. The nut 202 is fastened.

  The supporting flat bar 20 and the intermediate flat bar 40 are fixed using bolts 203 and nuts 204 on the other side. For example, the bolt 203 is inserted on the left side thereof from the long hole portion 44 on the back surface side of the intermediate flat bar 40 through the long hole portion 24 of the supporting flat bar 20, and the nut is attached to the end of the bolt 203 on the surface side of the supporting flat bar 20. 204 is fastened.

  The supporting flat bar 20 and the bridging flat bar 50 are fixed using bolts 205 and nuts 206 on the other side. For example, the bolt 205 is inserted into the lower left portion of the bridge flat bar 50 from the round hole portion 53 on the back side of the bridge flat bar 50 through the long hole portion 25 of the support flat bar 20, and the nut is attached to the end of the bolt 205 on the surface side of the support flat bar 20 Fasten at 206. As a result, a frame as shown in FIG. 6 that forms an intermediate form of the transfer assist frame 100 is completed.

  Next, the fixing member 60 is attached to the long hole portion 52 of the cross-linking flat bar 50 of the frame body forming the intermediate form. The fixing member 60 is provided in the lower part of the holding fitting 84 of the OPGW connection box 80. The fixing member 60 includes, for example, four fixing clamps 60a, 60b, 60c, and 60d. According to the fixing member 60, the force such as weight, twisting, and bending applied to the vicinity of the base of the holding fitting 84 and the like can be distributed to the fixing clamps 60a, 60b, 60c, and 60d during the winding operation.

  Here, with reference to FIGS. 7A and 7B, a configuration example of the fixed clamp 60a and the like and a function example thereof will be described. FIG. 7A is a front view showing a configuration example when the fixed clamp 60a is closed, and FIG. 7B is a front view showing a configuration example when the fixed clamp 60a is opened.

  The fixed clamp 60a shown in FIG. 7A includes a housing-like main body 61, a semi-columnar holding member 62, a first locking fitting 63 (large), a second locking fitting 64 (small), and a semi-cylindrical shape. The buffer member 65 and the pedestal 66 are configured.

  A shaft center pin 67 and shaft support portions 615 and 619 of holding metal fittings 63 and 64 for fixing the pressing member are provided at predetermined positions of the main body portion 61. The shaft center pin 67 is a connection pin for providing the base 66 with a movable range of the main body 61. The main body 61 and the pedestal 66 are pivotally engaged via the shaft center pin 67 so that the OPGW can be easily attached, and stress such as bending and bending at the base of the gripping part at the time of transfer is reduced. become able to. The pedestal 66 has a slightly thick square plate shape, and the pedestal 66 is provided with a plurality of female screws 611 and 612 for attaching a fixing member.

  The main body 61 and the pressing member 62 can be freely opened and closed by a locking fitting 63 on one side. For the locking fitting 63, a thumbscrew 613 (female screw) and a bolt 614 with one end rotating and annular are used. The thumbscrew 613 is screwed into the bolt 614, and the rotating annular portion of the bolt 614 is engaged with the first shaft support 615 of the main body 61.

  On one side of the pressing member 62, a U groove portion 616 having a groove width slightly wider than the bolt diameter is provided. The main body 61 (housing) side of the bolt 614 of the locking fitting 63 is rotatably engaged with the shaft support 615 in a direction orthogonal to the screw screw shaft. For example, when the thumb screw 613 is loosened in the bolt 614, the U groove portion of the presser member 62 as shown in FIG. 7B in a state where the thumb screw 613 is screwed to the bolt 614 with respect to the shaft support portion 615. It is configured to exit outward from 616.

  On the other side, the holding member 62 is supported on the main body 61 like a hinge structure by the locking metal fitting 64. A thumbscrew 617 (female screw) and a bolt 618 with one end rotating annularly are also used for the locking fitting 64. The thumbscrew 617 is screwed into a bolt 618 that is pulled out through an opening (not shown) provided at a predetermined position of the pressing member 62. The rotating annular portion of the bolt 618 is engaged with the second shaft support portion 619 of the main body portion 61. Thus, the suspension base position (base portion) of the presser member 62 can be freely changed, and the presser member 62 can be opened from the main body 61 (see FIG. 7B).

  The main body 61 has a semicircular arc-shaped part in the housing, and a semi-columnar buffer member 65a is attached to the semicircular arc part. The buffer member 65a is provided with a semi-cylindrical groove portion, and the groove portion holds one semi-arc arc in the length direction of the OPGW.

  A semi-cylindrical buffer member 65 b is attached to a semicircular arc-shaped portion inside the presser member 62. The buffer member 65b is also provided with a semi-cylindrical groove portion, and the groove portion holds the other semi-arc portion in the length direction of the OPGW. The buffer members 65a and 65b have a telescopic structure in order to correspond to the optical fiber composite ground wire (OPAC 55 to 170). Hard rubber is used for the buffer members 65a and 65b.

  In this example, OPGW # 1 and the like are sandwiched between the groove portion of the buffer member 65a and the groove portion of the buffer member 65b. With this sandwiching structure, the optical fiber composite ground wire can be easily temporarily fixed to the transfer auxiliary frame 100.

  In addition, since elastic materials such as hard rubber are used for the buffer members 65a and 65b with which the OPGW such as the fixed clamp 60a comes into contact, forces such as twisting and bending of the OPGW are further absorbed. As a result, the force concentrated in the vicinity of the gripping brackets 84, 85, 86, and 87 is dispersed, and the probability of occurrence of defects can be reduced.

  Next, an assembly example of the fixing member 60 to the transfer assist frame 100 will be described with reference to FIG. The fixing member 60 shown in FIG. 8 includes four fixing clamps 60a, 60b, 60c, and 60d as shown in FIGS. 7A and 7B. In this example, the fixed clamps 60a, 60b, 60c, 60d are attached in order from the right side to the left side of the bridging flat bar 50 of the transfer assist frame 100. The fixing clamps 60a to 60d individually fix the four optical fiber cables # 1 to # 4 drawn from the OPGW connection box 80 (see FIG. 10).

  Each fixed clamp 60 a to 60 d is attached to the elongated hole portion 52 of the bridging flat bar 50 using bolts 601 to 608. The fixed clamp 60a is engaged with a set of female screws 611 and 612 for mounting a fixing member on the base 66 of the fixed clamp 60a via bolts 601 and 602 passed through the long hole portion 52. Similarly, the fixed clamp 60b is engaged with a set of female screws 611 and 612 of the pedestal 66 of the fixed clamp 60b via bolts 603 and 604 passed through the long hole portion 52.

  Similarly, the fixed clamp 60c is engaged with a set of female screws 611 and 612 of the base 66 of the fixed clamp 60c via bolts 605 and 606 that are passed through the long hole portion 52. Similarly, the fixed clamp 60d is engaged with a set of female screws 611 and 612 of the pedestal 66 of the fixed clamp 60d via bolts 607 and 608 passed through the long hole portion 52. As a result, the fixing member 60 composed of the four fixing clamps 60a, 60b, 60c, and 60d can be attached to the transfer assisting frame 100.

  Next, with reference to FIGS. 9 and 10, an example of attachment of the OPGW connection box 80 to the transfer assist frame 100 will be described. The OPGW connection box 80 shown in FIG. 9 is in a state where the transfer auxiliary frame 100 is not attached. When the OPGW connection box 80 shown in FIG. 9 is viewed from the side of the OPGW gripping brackets 84 to 87, for example, the length of the bolts 804 to 807 that close the lid 81 is based on the lower surface of the lid 81, It is set to be about 2 to 3 times longer than the height of the nuts 814 to 817.

  The length is, for example, from the upper surface of the nuts 814 to 817, the thickness of the supporting flat bars 10 and 20 of the transfer auxiliary frame 100, the thickness of the bridging flat bar 30 and the intermediate flat bar 40 + the nuts 401 to temporarily fix the transfer auxiliary frame. It is set with a margin so as to be equal to or higher than the height of the nut such as 408.

  Note that the shaft support 844 shown in FIG. 9A is a portion that rotatably supports the rotating annular portion of the bolt 804. The shaft support portion 845 is a portion that rotatably supports the rotating annular portion of the bolt 805. The shaft support portion 846 is a portion that rotatably supports the rotating annular portion of the bolt 806. The shaft support portion 847 is a portion that rotatably supports the rotating annular portion of the bolt 807. Although not shown, the bolts 801, 802, and 808 are similarly configured.

  The OPGW connection box 80 shown in FIG. 9B is in a state where the transfer auxiliary frame 100 is attached. In this example, the bolt 804 of the OPGW connection box 80 is fastened and temporarily fixed by the nut 404 on the long hole 23 through the long hole 23 (see FIG. 10) of the carrying flat bar 20 on the nut 814.

  Similarly, the bolt 805 of the OPGW connection box 80 is fastened and temporarily fixed by the nut 405 on the long hole 43 through the long hole 43 (see FIG. 10) of the intermediate flat bar 40 on the nut 815. The bolt 806 is fastened and temporarily fixed by the nut 406 on the long hole portion 42 through the long hole portion 42 (see FIG. 10) of the intermediate flat bar 40 on the nut 816.

  The bolt 807 of the OPGW connection box 80 is fastened and temporarily fixed by the nut 407 on the long hole portion 14 through the long hole portion 14 (see FIG. 10) of the carrying flat bar 10 on the nut 817. Regarding the remaining bolts 801 to 803 and the bolt 808 of the OPGW connection box 80, as shown in FIG. 10, the bolt 801 is a long hole portion 32 of the bridging flat bar 30 on the nut 811 shown in FIG. 4 (see FIG. 6). And is fastened and temporarily fixed by the nut 401 on the elongated hole portion 32.

  The bolt 802 of the OPGW connection box 80 is fastened and temporarily fixed by the nut 402 on the long hole 33 through the long hole 33 (see FIG. 6) of the bridging flat bar 30 on the nut 812 shown in FIG. The bolt 803 is fastened and temporarily fixed by the nut 403 on the long hole portion 22 through the long hole portion 22 (see FIG. 6) of the support flat bar 20 on the nut 813 shown in the figure.

  Further, the bolt 808 of the OPGW connection box 80 is fastened and temporarily fixed by the nut 408 on the long hole 12 through the long hole 12 (see FIG. 6) of the carrying flat bar 10 on the nut 818 shown in FIG. Is done. In this example, four fixed clamps 60 a to 60 d shown in FIG. 8 are attached to the long hole portion 52 of the bridging flat bar 50.

  Further, OPGWs # 1 to # 4 drawn out from the OPGW connection box 80 shown in FIG. 10 are fixed to a fixing clamp 60a attached to the back side of the bridging flat bar 50. Similarly, OPGW # 2 is fixed to the fixed clamp 60b, OPGW # 3 is fixed to the fixed clamp 60c, and OPGW # 4 is fixed to the fixed clamp 60d. As shown in FIG. 8, each of the fixed clamps 60 a to 60 d passes a predetermined bolt 601 to 608 through the long hole portion 52 of the bridging flat bar 50 in advance and engages with each pedestal 66, thereby bridging the flat. It is fixed to the bar 50. Thereby, the temporary mounting of the OPGW connection box 80 to the transfer assist frame 100 is completed.

Next, with reference to FIGS. 11 to 13, a handling example of the transfer auxiliary frame 100 at the time of moving the connection box will be described.
<When lifting the OPGW connection box 80 and attaching it to the steel tower 200>
In step ST1 of the process flowchart when moving the junction box shown in FIG. 11, the worker assembles the transfer assist frame 100 on the ground. As for the assembly of the transfer assisting frame 100, six bolts 101, 103, 105, 201, 203, 205 and six bolts 101, 103, 105, 201, 203, 205 are provided between the carrier flat bar 10 and the carrier flat bar 20, as shown in FIG. The cross-linked flat bar 30, the intermediate flat bar 40 and the cross-linked flat bar 50 are attached using the nuts 102, 104, 106, 202, 204 and 206. Thereafter, four fixing clamps 60 a to 60 d are attached to the bridging flat bar 50 using eight bolts 601 to 608. Thereby, the transfer assistance frame 100 is obtained. For details, refer to FIGS. 5 to 8 and the description thereof.

  Next, in step ST <b> 2, the worker temporarily fixes the OPGW connection box 80 to the transfer assist frame 100. At this time, the long holes 12, 13, 22, 23 of the supporting flat bars 10, 20, the long holes 32, 33 of the bridging flat bar 30 and the intermediate flat bar 40 corresponding to the bolts 801 to 808 of the OPGW connection box 80, respectively. The nuts 401 to 408 are used and the bolts 801 to 808 are fastened. The OPGWs # 1 to # 4 are fixed by corresponding fixing clamps 60a to 60d. For details, refer to FIGS. 9 to 10 and the description thereof.

  Thereafter, in step ST3, the operator performs a lifting operation. In this work, a crane or the like is used to lift both ends of the transfer auxiliary frame 100 to which the OPGW connection box 80 is temporarily fixed, and move to a predetermined mounting position. At this time, the return rope is attached using the round hole portions 16 and 26 at the upper ends of the support flat bars 10 and 20, and the transfer assisting frame 100 is lifted by the hoisting machine.

  In step ST <b> 4, the worker attaches the OPGW connection box 80 to which the transfer assist frame 100 is attached to a predetermined position of the steel tower 200. At this time, the OPGW connection box 80 is attached to the steel tower 200 in a state in which a load is applied to the return rope. On the left side of the OPGW connection box 80, the operator attaches a U-shaped bolt or the like (not shown) to a component of the steel tower 200, passes the end of the U-shaped bolt through the round hole portions 821 and 822, and fastens with a nut. To do. On the right side, a U-shaped bolt or the like (not shown) is attached to a component of the steel tower 200, and the end of the U-shaped bolt is passed through the round hole portions 831 and 832 and fastened with a nut. Thereby, the OPGW connection box 80 can be attached to the steel tower 200 in a state in which a load is applied to the return rope.

  Thereafter, in step ST <b> 5, the worker removes the transfer assist frame 100 from the OPGW connection box 80 attached to the steel tower 200. At this time, the nuts 401 to 408 corresponding to the bolts 801 to 808 of the OPGW connection box 80 are loosened and removed, and the bolts 801 to 808 are connected to the long holes 12, 13, 22, 23, bridge of the carrying flat bars 10, 20. The long hole portions 32 and 33 of the flat bar 30 and the long hole portions 42 and 43 of the intermediate flat bar 40 come out.

  Further, the fixing clamps 60a to 60d are opened, and each of the OPGWs # 1 to # 4 is removed from the transfer assist frame 100. At this time, depending on the work procedure, the hook member 70 may be attached to the bridging flat bar 30 and the transfer assisting frame 100 may be temporarily fixed (temporarily placed) to the structural member of the steel tower 200.

  In step ST6, the worker suspends the transfer assist frame 100 to the ground. At this time, the transfer assist frame 100 is hung down by unwinding the knitting rope passed through the round hole portions 16 and 26 at the upper end portions of the supporting flat bars 10 and 20. Thereafter, in step ST7, the operator disassembles the relocation assist frame 100 on the ground. As for the disassembly procedure of the transfer assisting frame 100, the work may be performed in the reverse order of the assembly of the transfer assisting frame 100. Thereby, the work of attaching the OPGW connection box 80 to the steel tower 200 is completed.

<When pulling down the OPGW connection box 80 from the tower 200>
In step ST11 shown in FIG. 12, the worker assembles the transfer assist frame 100 on the ground. For the assembly of the transfer assist frame 100, refer to step ST1 shown in FIG.

  Next, in step ST12, the operator performs a lifting operation. At this time, the operator passes the rope through the round hole portions 16 and 26 at the upper end portions of the carrying flat bars 10 and 20, lifts the transfer auxiliary frame 100 using a crane or the like, and installs the OPGW connection box 80. Move to.

  Thereafter, in step ST <b> 13, the worker temporarily fixes the transfer assist frame 100 to the OPGW connection box 80 attached to the steel tower 200. At this time, OPGW # 1 to # 4 corresponding to each are fixed by the fixing clamps 60a to 60d corresponding to the holding fittings 84 to 87 of the OPGW connection box 80.

  In step ST14, the operator removes the OPGW connection box 80, to which the transfer assist frame 100 is temporarily fixed, from the steel tower 200 or the like. At this time, the OPGW connection box 80 is removed from the steel tower 200 in a state where a load is applied to the return rope. On the left side of the OPGW connection box 80, the operator loosens the nut at the end of a U-shaped bolt or the like attached to a component or the like of the tower 200 (not shown). Thereafter, the nut is removed from the end of the U-shaped bolt. Even on the right side, the nut at the end of the U-shaped bolt or the like attached to the component of the tower 200 (not shown) is loosened. Remove the nut from the end of the U-shaped bolt.

  Thereby, the OPGW connection box 80 can be removed from the steel tower 200 by pulling out the U-shaped bolts from the round hole portions 821, 822, 831, 832 of the attachment piece members 82, 83 of the OPGW connection box 80. At this time, the entire load of the OPGW connection box 80, the transfer auxiliary frame 100, and the four OPGWs # 1 to # 4 is carried by the crane. Thereby, the OPGW connection box 80 can be removed from the steel tower 200 in a state in which a load is applied to the return rope.

  Thereafter, in step ST15, the operator maintains the state where both ends of the transfer auxiliary frame 100 to which the OPGW connection box 80 is temporarily fixed is lifted and operates the hoisting machine to move the OPGW connection box 80 to which the OPGW connection box 80 is temporarily fixed. The frame 100 is pulled down to the ground.

  In step ST <b> 16, the worker removes the transfer assist frame 100 from the OPGW connection box 80 on the ground. At this time, the OPGWs # 1 to # 4 are first removed from the fixed clamps 60a to 60d. Next, the transfer auxiliary frame 100 is removed from the OPGW connection box 80. As for the procedure, the eight bolts 801 to 808 of the OPGW connection box 80 are removed by loosening the corresponding nuts 401 to 408.

  Next, from the eight bolts 801 to 808, the long hole portions 12, 13, 22, 23 of the carrying flat bars 10, 20, the long hole portions 32, 33 of the bridging flat bar 30 and the long holes of the intermediate flat bar 40. The transfer auxiliary frame 100 is removed from the OPGW connection box 80 so as to remove the portions 42 and 43.

  Thereafter, in step ST <b> 17, the worker disassembles the transfer assist frame 100 on the ground. As for the disassembly procedure of the transfer assisting frame 100, the work may be performed in the reverse order of the assembly of the transfer assisting frame 100. Thereby, the operation | work which removes OPGW connection box 80 from the steel tower 200, and pulls down is complete | finished.

  When the OPGW connection box 80 is moved from one mounting position to the other new mounting position on the steel tower 200, the worker temporarily moves the transfer auxiliary frame 100 from the state of step ST14 shown in FIG. The OPGW connection box 80 in a fixed state is moved to the next attachment position on the steel tower 200. At this time, in step ST21 shown in FIG. 13, the operator lifts and moves the OPGW connection box 80 with a crane or the like.

  Thereafter, in step ST <b> 22, the operator attaches the OPGW connection box 80 to the steel tower 200 at a new transfer destination in the steel tower 200. At this time, the OPGW connection box 80 is attached to the steel tower 200 in a state in which a load is applied to the return rope. For the method of attaching the OPGW connection box 80 to the steel tower 200, refer to the explanation of step ST4 shown in FIG.

  In step ST23, the worker removes the transfer assisting frame 100 from the OPGW connection box 80 attached to the new transfer destination. At this time, OPGW # 1 to # 4 are respectively removed from the fixed clamps 60a to 60d. For the removal procedure, refer to the description of step ST5 shown in FIG. Thereafter, the relocation auxiliary frame 100 whose role is finished in step ST24 is pulled down to the ground. Thereafter, in step ST25, the worker disassembles the transfer assist frame 100 and finishes the work.

  As described above, according to the transfer auxiliary frame 100 of the OPGW connection box 80 as the embodiment, at least one pair of the supporting flat bars 10 and 20 and the four nuts 403, 404, 407, and 408 are provided, and the supporting flat bar is provided. 10 and 20 are elongated holes 22, 23, 13, through which bolts 803, 804, 807, 808 protruding from the surface opposite to the mounting surface of the OPGW connection box 80 can be inserted. 12. The nuts 403, 404, 407, and 408 are temporarily engaged with the bolts 803, 804, 807, and 808 of the OPGW connection box 80 inserted through the elongated holes 22, 23, 13, and 12 of the carrying flat bars 10 and 20. Fix it. Based on these assumptions, round holes 16 and 26 for lifting are provided at one end of each of the holding flat bars 10 and 20 to which the OPGW connection box 80 is temporarily fixed.

  With this structure, the OPGW connection box 80 can be moved by lifting the round hole portions 16 and 26 of the holding flat bars 10 and 20 to which the OPGW connection box 80 is temporarily fixed. As a result, the lifting work or the like can be performed using the carrier flat bars 10 and 20 attached to the side other than the attachment surface side of the OPGW connection box 80. On the attachment surface side of the OPGW connection box 80, the OPGW connection box 80 can be easily attached to the steel tower 200 or the like without the suspension source getting in the way. In addition, the possibility of communication failure is reduced.

  According to the transfer auxiliary frame 100 of the OPGW connection box 80, since the elongated flat holes 32 and 33 are provided in the bridging flat bar 30, when the OPGW connection box 80 is transferred, the upper side of the OPGW connection box 80 is Even if the arrangement intervals of the bolts 801 and 802 of the OPGW connection box 80 are different, they can be attached with some margin.

  Furthermore, according to the transfer auxiliary frame 100 of the OPGW connection box 80, since the hook members 70 are attached to the long hole portions 32 and 33 provided in the bridging flat bar 30, the transfer auxiliary frame 100 is transferred when the OPGW connection box 80 is transferred. Until the 100 is temporarily fixed to the OPGW connection box 80, the transfer auxiliary frame 100 can be temporarily placed (supported) on the steel tower 200 by the hook member 70.

  Further, according to the transfer auxiliary frame 100 of the OPGW connection box 80, since the elongated holes 42 and 43 are formed in the intermediate flat bar 40, the lower part of the OPGW connection box 80 is moved when the OPGW connection box 80 is transferred. The side can be fixed, and even if the spacing between the bolts 805 and 806 of the OPGW connection box 80 is different, the OPGW connection box 80 can be attached wide (thick) with some margin.

  Furthermore, according to the transfer auxiliary frame 100 of the OPGW connection box 80, four fixed clamps 60a, 60b, 60c, 60d are attached to the bridging flat bar 50, and OPGW # 1 to # 4 pulled out from the OPGW connection box 80 are Since it is fixed individually, the OPGW connection box can be applied even when an external force such as weight, twisting, bending or the like is applied near the base of the OPGW connection box 80, compared to the case where the fixing clamps 60a, 60b, 60c, 60d are not used. Stresses such as weight, twisting, and bending applied to the OPGW drawn from 80 can be avoided by the fixed clamps 60a, 60b, 60c, and 60d. In addition, it is possible to avoid the occurrence of problems such as the removal of the OPGW from the holding fittings 84, 85, 86, 87 of the OPGW connection box 80.

  Further, according to the method of handling the transfer auxiliary frame 100 of the OPGW connection box 80, when the connection box is transferred, the round hole portions 16 of the respective supporting flat bars 10, 20 of the transfer auxiliary frame 100 to which the OPGW connection box 80 is temporarily fixed are fixed. , 26 are lifted and the OPGW connection box 80 is moved.

  With this configuration, the transfer auxiliary frame 100 is first attached to the OPGW connection box 80, so that the round hole portions 16 and 26 can be connected to each other with a looper until the OPGW connection box 80 is fixed to the steel tower 200. become able to. Thereby, since the OPGW connection box 80 can be removed from the steel tower 200 in a state where a load is applied to the return rope, the relocation work can be performed while the OPGW connection box 80 is stable. In addition, since the OPGW connection box 80 can be maintained in a stable state, the possibility of communication failure is reduced.

  In addition to the operations and effects described above, as a merit at the time of assembly, since the transfer assist frame 100 is made of a flat bar material, it is lightweight and has good workability. Further, since the transfer auxiliary frame 100 is constructed by assembling the bolts 101, 103, 105, 201, 203, 205 and the nuts 102, 104, 106, 202, 204, 206, the transfer auxiliary frame 100 itself becomes compact and can be transported. Easy (easy) to do.

  In addition, since the long hole portions 11 to 15 for mounting, the long hole portions 21 to 25, the long hole portions 31 to 34, the long hole portions 41 to 44, and the long hole portion 52 are all configured in a long hole shape, various manufacturers The transfer auxiliary frame 100 that can be attached to the OPGW connection box 80 of the present invention can be provided.

  INDUSTRIAL APPLICABILITY The present invention is extremely suitable for application to a transfer auxiliary frame when moving an OPGW connection box for connecting an optical fiber composite ground wire (OPGW) in a steel tower and when lifting and lowering the box.

10 Supporting flat bar (first supporting member)
20 carrying flat bar (second carrying member)
30 Cross-linked flat bar (first cross-linked member)
40 Intermediate flat bar (intermediate member)
50 Crosslinked flat bar (second crosslinked member)
60 fixed member 60a, 60b, 60c, 60d fixed clamp (fixed member)
66 Base 67 Axial pin 70 Hook member 70a, 70b Hook fitting (hook member)
80 OPGW connection box 100 Auxiliary transfer frame 101, 103, 105, 201, 203, 205 Bolt 102, 104, 106, 202, 204, 206 Nut 401-408 Nut (engaged member)
601-608 nut

Claims (6)

A set of carriers having a first hole portion through which an engaging member protruded from the surface opposite to the mounting surface side of the optical fiber composite ground wire (hereinafter referred to as OPGW) connection box;
An engaged member that is engaged with and temporarily fixed to the engaging member of the OPGW connection box inserted through the first hole of the carrier,
The OPGW connection box transfer bracket, wherein the OPGW connection box has a second hole for lifting at one end of each carrier to which the OPGW connection box is temporarily fixed. A first bridging member arranged and fixed so as to bridge the upper end of the one set of carriers,
A third hole portion having a long hole shape is provided at a predetermined position of the first bridging member, and is a surface opposite to the mounting surface side of the OPGW junction box and protruding upward The transfer bracket of the OPGW connection box according to claim 1, wherein the member can be inserted.   3. The OPGW connection box transfer bracket according to claim 2, wherein a hook member for temporary fixing is attached to the third hole. An intermediate member arranged and fixed so as to crosslink an intermediate portion of the set of carriers,
A fourth hole portion having a long hole shape is provided at a predetermined position of the intermediate member, and is an opposite surface to the mounting surface side of the OPGW connection box, and an engagement member protruding to the lower side is provided. The transfer fitting for an OPGW connection box according to claim 2, wherein the transfer fitting is capable of being inserted. A second bridging member arranged and fixed so as to bridge the lower end of the one set of carriers,
The transfer fitting for an OPGW connection box according to claim 2, wherein a fixing member for individually fixing the OPGW drawn from the OPGW connection box is attached to a predetermined position of the second bridging member. It has a first hole portion through which the engaging member protruding from the surface opposite to the mounting surface side of the OPGW junction box can be inserted, and a second hole portion for lifting at each end. To the transfer fitting provided with a pair of carriers and a member to be engaged that is temporarily engaged and engaged with an engagement member of the OPGW connection box inserted through the first hole of the carrier. Attaching and temporarily fixing the junction box;
A method of handling the transfer fitting of the OPGW connection box, comprising the step of lifting the second hole of each carrier of the transfer fitting to which the OPGW connection box is temporarily fixed, and transferring the OPGW connection box. .

Images