JP5277323B2 - Equipment fixing device for outdoor aerial cable - Google Patents

Description

  The present invention makes it impossible to move installed items such as insulating protective pipes, bird damage prevention devices, swarm prevention devices, etc., for transmission cables, communication cables, utility poles, and other outdoor overhead cables installed in the air. The present invention relates to a device for fixing.

As is well known, for example, for outdoor aerial cables installed in the air by utility poles, insulating protective pipes such as construction trouble protective pipes to prevent contact with cranes or trees during construction work, Alternatively, attached items such as a cylindrical bird damage prevention tool for preventing wild bird dropping damage, or a vine prevention tool for preventing wrapping of plants such as moths are attached as necessary.
These attachments prevent the cable from moving by strong winds such as typhoons or moving by its own weight by winding a bind wire around the cable or tightening a screw.

However, if the field worker is too tightly wound by the field worker, it will be in a state where it has digged into the insulation of the cable, and if this state continues for a long period of time, there will be a possibility that a minute crack will occur in the insulation and damage the insulation. In addition, if the wrapping by the field worker is unsatisfactory, there is a problem in that the fixing force is weak and the attached product moves.
In addition, fixing by screw tightening has a stronger fixing force than the bind line and less variation by field workers, but if the tightening force is insufficient, it can be moved by strong winds or traffic of large trucks etc. In the case where the device is installed in a violent place, there is a risk that the attached product may move due to loosening of the tightening due to vibration over time.

  Moreover, the fixture of a clamp structure is shown by the following patent document 1. FIG. This is because the screw rod is screwed to the lower horizontal arm portion of the body member formed in a side U shape, and the wire holding portion is provided between the receiving member provided at the upper end of the screw rod and the upper horizontal arm portion. In addition, by providing a locking rod-like body for detachably locking the operating rod at the lower end of the screw rod, the fixing tool can be fixed remotely to the electric wire at a high place.

  Further, the fixture shown in Patent Document 2 below is a fixture having a clamp structure similar to that of Patent Document 1, and is provided with a tapered protrusion that gradually increases in thickness toward the upper side on the inner side of the body member. As the rod is rotated to raise the receiving member, the receiving member comes into contact with the tapered protrusion, and the screw rod is prevented from loosening due to the friction.

Japanese Patent Publication No. 7-59127 JP-A-9-140016

  However, since the fixture shown in the cited document 1 is for fastening the screw rod of the fixture suspended in the air by remote control from below, a sufficient tightening force may not be obtained. Since no preventive means is provided, there is still a problem that it is easily loosened by vibration.

  Moreover, although the fixing tool shown in the cited document 2 can be expected to have an effect of preventing loosening if the thickness of the electric wire is constant, if the electric wire is thick, the receiving member does not come into contact with the taper-shaped protrusion and prevents loosening. However, in the case of a thin electric wire, there is a problem that the receiving member hits the tapered protrusion and stops, so that electric wires having different thicknesses cannot be clamped uniformly.

  An apparatus for fixing an attachment to an outdoor aerial cable according to the present invention is intended to solve the above-mentioned problem. A screw rod provided with an engagement body capable of detachably connecting the operation rod is screwed perpendicularly to the lower arm portion, and a shaft-like portion is projected from the upper end of the screw rod to be elastically expanded and contracted. The ring body formed in this manner is loosely fitted to the outer periphery of the shaft-like portion, the receiving member is supported on the ring body, and the diameter of the ring body and the receiving member is gradually decreased with the facing surface facing upward. The receiving member is supported so that rotation is prevented by a side projecting portion coming into contact with the main body frame, and the receiving rod is operated by rotating the screw rod by operating the operating rod. When the member is raised and lowered so that the cable is sandwiched between the receiving member and the upper arm portion Further, when the cable is clamped, the screw rod presses the ring body, whereby the ring body is reduced in diameter along the tapered opposing surface, and the shaft-like portion is tightened by the reduced diameter ring body. It is characterized by doing so.

  Further, the present invention provides a device for fixing an attachment to an outdoor aerial cable, wherein a vertical streak-like unevenness that restrains relative rotation between the ring body and the receiving member is formed on the opposing surface of the ring body and the receiving member. It is characterized by that.

  According to the mounting device fixing device according to the present invention, the transmission / distribution line, communication line, utility pole branch line, and other outdoor aerial cables are not loosened by shaking due to strong winds or vibrations in places with heavy traffic, and regardless of thickness. Can be held between. For this reason, attachment goods, such as an insulating protective tube, a bird damage prevention tool, a swoop prevention tool, can be fixed to an outdoor aerial cable so that it cannot move over a long period of time.

The front view of the mounting goods fixing device which concerns on this invention. The longitudinal cross-sectional view of the principal part of the mounting goods fixing device which concerns on this invention. FIG. 3 is a sectional view taken along the line AA in FIG. 2. The perspective view of the ring body of the mounting goods fixing device which concerns on this invention. The side view which shows the use condition of the mounting goods fixing device which concerns on this invention. The perspective view of the connection member of the mounting goods fixing device which concerns on this invention. The longitudinal cross-sectional view of the principal part of the mounting | wearing goods fixing device which showed the operation state of FIG. The perspective view which showed other embodiment of the ring body of the mounting goods fixing device which concerns on this invention. The perspective view which showed other embodiment of the ring body of the mounting goods fixing device which concerns on this invention. The side view which shows the use condition of the mounting goods fixing device which concerns on this invention. The side view which shows the use condition of the mounting goods fixing device which concerns on this invention.

  In FIG. 1, reference numeral 1 denotes a body frame formed in a substantially U-shaped side surface by integrally forming a lower arm 3 and an upper arm 4 on a trunk 2, and 5 is screwed vertically to the lower arm 3. It is a screw rod. In addition, the lower surface of the upper arm part 4 is formed in the circular arc surface shape so that the outer peripheral surface of the outdoor aerial cable 20 mentioned later may be followed. Further, a jetty 6 and a small projection 7 for attaching a connecting member 23 described later are integrally formed on the upper surface of the upper arm portion 4. Reference numeral 1 a denotes a reinforcing rib formed on the upper back of the main body frame 1. Further, a hook-shaped engagement body 8 having an open lower surface for connecting an operation rod 27 described later is provided at the lower end of the screw rod 5. Reference numeral 8a denotes a hook-shaped engagement hole formed in the peripheral wall surface of the engagement body. Further, as shown in FIG. 2, a shaft-like portion 9 is provided concentrically on the upper end surface of the screw rod 5, and the tip end portion of the shaft-like portion 9 is formed to have a slightly larger diameter for the purpose of retaining. Yes.

  Reference numeral 10 denotes a ring body that is loosely fitted to the outer periphery of the shaft-shaped portion 9, and as shown in FIG. 4, the ring body 10 is formed in a tapered shape with the outer peripheral surface 11 gradually becoming a smaller diameter upward. In addition, by forming a vertical streak-like cut groove 13 in a part of the inner peripheral surface 12 and forming a vertical slit-like cut 14 in a portion opposite to the cut groove 13, the elastic expansion and contraction is achieved. Is formed.

  Reference numeral 15 denotes a receiving member formed in a circular arc shape so that the upper surface 16 is along the outer peripheral surface of the outdoor aerial cable 20. An inner peripheral surface 18 of the lower surface portion 17 of the receiving member 15 facing the outer peripheral surface 11 of the ring body 10 is formed in a tapered shape that gradually becomes smaller in diameter toward the upper side like the outer peripheral surface 11. The receiving member 15 is supported on the ring body 10 by making the outer peripheral surface 11 and the inner peripheral surface 18 face each other. As shown in FIG. 3, the receiving member 15 is integrally formed with a pair of side projecting portions 19 projecting horizontally from both side edge portions, and the body frame 1 is interposed between the side projecting portions 19. Since the trunk portion 2 is supported on the ring body 10 so that the trunk portion 2 is positioned, even if the receiving member 15 tries to rotate in a horizontal plane, the rotation of the lateral projecting portion 19 against the trunk portion 2 is prevented. I try to be blocked.

  FIG. 5 shows a rotary bird damage prevention device 21 rotatably provided on the outer periphery of an outdoor aerial cable 20 installed between utility poles, and the rotary bird damage prevention device 21 is installed in the longitudinal direction of the cable by a fitting fixing device according to the present invention. Shows the status of mooring incapable of movement. The rotary bird damage prevention device 21 is rotated by its own weight when the wild bird stops, so that the wild bird is frightened so that the wild bird does not approach. The rotary bird harm prevention tool 21 is formed with a tapered sleeve-shaped female portion 22a at one end of the rotary bird harm prevention tool 21, and the female portion at the other end of the rotary bird harm prevention tool 21 so that they can be connected to each other. A male portion 22b that can be loosely fitted therein is formed.

  Reference numeral 23 denotes a connecting member that connects the rotary bird harm prevention tool 21 and the wearing product fixing device according to the present invention. As shown in FIG. 6, the connecting member 23 has a groove in which the jetty 6 is fitted and a small recess in which the small protrusion 7 is fitted on the lower surface of the main part 24. A cylindrical section 25 having a semicircular cross section is formed at the edge, and a semicircular arc hook-shaped hook section 26 is formed at the tip of the cylindrical section 25. The main body 24 is crowned on the upper arm section 4. The hook portion 26 is loosely fitted into the 22. As a result, the rotary bird harm prevention tool 21 is moored so as not to move in the longitudinal direction of the cable. Reference numeral 27 denotes an operating rod that is formed in a longitudinal direction so that a field worker can remotely control the outdoor overhead cable 20 from below. A pair of engaging pins 28 project in a lateral direction at the upper end of the operating rod. The operating bar is elongated so that a field worker can remotely operate the outdoor overhead cable 20 from below.

  As shown in FIG. 5, the mounted product fixing device in which the rotary bird harm prevention device 21 is anchored in this manner, with the upper arm 4 placed on the outdoor overhead cable 20, the field worker can operate the operation rod. 27 is inserted into the engaging body 8 to engage the engaging pin 28 with the engaging hole 8a, and the screw member 5 is rotated to move the receiving member 15 up and down. The cable 20 is sandwiched between the cable 4 and the cable 4. At this time, as shown in FIG. 7, the upper surface of the screw rod 5 presses the ring body 10, and the ring body 10 is pushed up. Therefore, the ring body 10 is narrowed and reduced in diameter along the tapered inner peripheral surface 18 of the receiving member 15, and the shaft-like portion 9 is tightened by the reduced-diameter ring body 10. The integral screw rod 5 is made difficult to rotate. Thus, in the state where the outdoor aerial cable 20 is sandwiched with appropriate pressure between the receiving member 15 and the upper arm portion 4, the screw rod 5 becomes difficult to rotate, so that loosening can be prevented. For this reason, even if it receives a strong wind or a vibration in a place with heavy traffic, a firm clamping state can be maintained for a long time.

In this embodiment, the outer peripheral surface 11 of the ring body 10 and the inner peripheral surface 18 of the receiving member 15 are both tapered. However, even if only one of the opposing surfaces is tapered, the ring body 10 is pushed. The diameter can be reduced according to the pressure.
Further, the ring body 10 shown in FIG. 4 is expanded and contracted by forming the cut line 14, but as shown in FIG. 8, the upper part of the ring body 10 is formed in a vertically split shape over the entire circumference. By doing so, it may be possible to expand or contract.

  In any case, according to the attachment fixing device according to the present invention, even if the thickness of the cable changes, it can be clamped without any trouble, and a loosening prevention function can be obtained simply by rotating the screw rod and clamping the cable. As a result, even if a field worker remotely operates with an operation rod, it is surely prevented from loosening, and a firm clamping state can be maintained over a long period of time.

  Further, in the embodiment shown in FIG. 9, the vertical streak-like unevenness 30 is formed on the outer peripheral surface of the ring body 10 shown in FIG. 4, and the unevenness 30 is loosely fitted on the inner peripheral surface 18 of the receiving member 15. By forming vertical stripes (not shown), the relative rotation between the ring body 10 and the receiving member 15 is restrained. That is, by forming such vertical streaks on the opposing surfaces of the ring body 10 and the receiving member 15 so as to prevent relative rotation between the ring body and the receiving member, the outdoor aerial The loosening of the screw rod 5 in the state where the cable 20 is clamped can be prevented more reliably.

  Note that FIG. 10 shows that the connecting member 23A in which the cylindrical portion 25 and the hook portion 26 are formed on both sides of the main body portion 24 is fixed on the upper arm portion 4 of the wearing product fixing device according to the present invention. The use state in which the rotary bird harm prevention tool 21 is moored so as not to move on both sides of the attachment fixing device is shown.

  The attachment fixing device according to the present invention is used to immovably fix attachments such as an insulating protective tube and a beak prevention device in addition to the bird damage prevention device shown as the embodiment. FIG. 11 illustrates a usage state in which the anti-winding device 41 is supported so as not to slide down by fixing the mounting product fixing device according to the present invention to the utility pole branch line 40.

DESCRIPTION OF SYMBOLS 1 Main body frame 2 Trunk part 3 Lower arm part 4 Upper arm part 5 Screw rod 8 Engagement body 9 Axial part 10 Ring body 11 Outer peripheral surface of ring body 12 Inner peripheral surface of ring body 13 Cut groove 14 Recess 15 Receiving member 18 Receiving member Inner peripheral surface 19 side projecting portion 20 outdoor aerial cable 21 rotary bird harm prevention device 23 connecting member 27 operation rod 30 unevenness

Claims (2)

  By forming the lower arm and the upper arm, a substantially U-shaped main body frame is formed, and a screw rod provided with an engagement body capable of detachably connecting the operation rod at the lower end is perpendicular to the lower arm. A ring-shaped portion protruding from the upper end of the threaded rod, and a ring body formed to be freely expandable and contracted freely on the outer periphery of the shaft-shaped portion, and supporting a receiving member on the ring body, The opposing surface of the ring body and the receiving member is formed in a taper shape with a gradually decreasing diameter upward, and the receiving member is prevented from rotating by a side projecting portion coming into contact with the main body frame. The receiving member is supported by operating the operating rod and rotating the screw rod to raise and lower the cable so that the cable is held between the receiving member and the upper arm portion, and the cable is held When the threaded rod presses the ring body, the ring body becomes the tapered opposing surface Along a reduced diameter, mounted article fixing device by reduced diameter ring member to the outdoor aerial cable, characterized in that as the shaft-like portion is tightened.   2. The attachment to an outdoor aerial cable according to claim 1, characterized in that vertical streaks are formed on the opposing surfaces of the ring body and the receiving member to prevent relative rotation between the ring body and the receiving member. Product fixing device.

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