JP5268680B2 - Tool for removing difficult snow ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for removing a snow resistant ring which, when the snow resistant ring is removed from an overhead-line, can be attached to the overhead-line without passing through numerous processes for prior preparation, does not require much skill even for its operation and is designed by considering the damage to the overhead-line. <P>SOLUTION: The tool for removing the snow resistant ring includes: an overhead-line gripping member 4 to hold the overhead-line 1, and an overhead-line gripping member 5 located on the side opposite to the overhead-line gripping member 4 against the snow resistant ring 2 and having a wedge blade 23 directed to the side of the overhead-line gripping member 4. A ring pressing movable member 6 is disposed between the snow resistant ring 2 and the overhead-line gripping member 4, and operation by an operation lever 40 transmits power from a movable coupling member 7 to press the snow resistant ring 2 to the side of the overhead gripping member 5, thus this ring pressing movable member 6 can rupture the snow resistant ring 2 by the wedge blade 23 of the overhead-line gripping member 5. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure of a tool for removing or removing a snowfall ring attached at a predetermined interval with respect to a communication line such as an electric wire or an optical fiber cable or another overhead line installed outdoors.

  In areas where there is a lot of snow, the frequency of snowfall on the overhead lines such as electric wires increases and the snowfall period becomes relatively long. It is known that accidents such as cutting of the overhead wire may occur due to an increase in the total weight or an increase in the vibration width of the overhead wire due to wind, and it is difficult to stop the growth of this snow accretion and prevent freezing. An invention in which a snow ring is attached to an overhead wire is also known (see, for example, Patent Document 1).

  Depending on the situation, it is necessary to remove the difficult snow ring from the overhead wire in an aerial state, but the removal work of the difficult snow ring is generally an air riding work using an air hoist (for example, Patent Document 2). In addition, since it was removed manually one by one using pliers (see, for example, Patent Document 2 and Patent Document 3), work efficiency is poor, and the worker also uses grip strength. Since it was easy to get tired, it had the fault that the burden on the worker was heavy.

  In response to this, as shown in Patent Document 2, for example, a rear disk having a through hole for an electric wire in the shaft center part, and a front disk having a passage hole for a snow-resistant ring in the shaft center part, Means for connecting the front disk to the rear disk so as to be close to and away from a predetermined range in the direction of the electric wire, means for connecting to the means and connecting it to the traction means or the fixed system, and the rear part Provided around the through-hole of the disc, and when the electric wire is moved relative to the rear disc, the rear disc is moved or retained with respect to the electric wire, the inner peripheral surface of the above-mentioned snow ring is engaged. And a first wedge for expanding this outward in the radial direction, and a hard snow ring provided around the through hole of the front disk to guide the hard snow ring outward in the radial direction of the electric wire. A second wedge for detaching the ring from the electric wire, and a snowfall ring around the passage hole of the front disc Has been developed that includes a stopper provided so that it can pass only to the rear disk side, and a resilient means for urging the front disk in the proximity direction with respect to the rear disk. It is publicly known.

  Moreover, as shown in Patent Document 3, for example, two ring removal rolls provided with circumferential protrusions on two semicircular outer circumferential grooves on the outer circumference of the roll are arranged with the outer circumferential grooves facing each other, The transmission line with a snow ring is continuously passed between the semicircular outer grooves of both rolls, and the snow ring attached to the power transmission line is pressed by the protrusions of the semicircular outer grooves of both rolls. Thus, a snow-removing ring removing device having a structure to be removed has been developed and publicly known.

  Furthermore, as shown in Patent Document 4, for example, an operation rod equipped with a recess so as to insert and fix a part of a difficult-to-snow ring attached to the electric wire, and the electric wire facing the concave portion along the electric wire. In this way, a device for removing a difficult-to-snow ring has been developed, which is composed of a cutting housing that is provided with a convex part that translates and provides a breakage force to the difficult-to-snow ring with the concave part of the operation rod as a fulcrum. .

  And, as shown in Patent Document 5, for example, a moving housing provided with a running support roller that can move along the electric wire, and a part of the difficult snow-covering ring as the moving housing moves. An operation rod having a recessed portion to be introduced, and a chain body that directly faces the operation rod and introduces another part of the hard-to-fall snow ring between the convex portions of the link chain. As a fulcrum, a snow-removing ring removal device that develops a breaking force to the snow-retaining ring by the convex part of the chain body has been developed and is publicly known.

JP 2006-311629 A Patent No. 284003 Patent Publication JP-A-3-218215 JP 2006-94695 A JP 2007-166845 A

  However, in the apparatus for removing or removing the difficult snow ring shown in Patent Document 2 to Patent Document 5, the form is relatively large due to its complicated structure, and the weight increases accordingly, and the apparatus is connected to the overhead line. Since many steps are required as a process for mounting the ring, there are problems that the preparation time for removing the difficult snow ring is prolonged and the labor for preparation is increased.

  In addition, since a certain level of skill is required to operate the device for removing or removing the difficult snow ring shown in Patent Document 2 to Patent Document 5, the number of workers operating is limited, or There is an inconvenience that the possibility of causing an accident when operating by a person who is not high is increased. Moreover, in the structure of the apparatus for removing or removing the difficult snow ring shown in Patent Document 2 to Patent Document 5, the overhead wire may be damaged when the difficult snow ring is removed from the overhead line.

  On the other hand, the removal of the hard snow ring by the worker's manual work, as shown in these Patent Document 2 to Patent Document 5, is also in terms of work efficiency and the burden on the worker. It is difficult to adopt.

  Therefore, the present invention can be attached to the overhead line without going through many processes in preparation for removing the difficult snow ring from the overhead line, and the operation thereof does not require so much skill. An object of the present invention is to provide a tool for removing a difficult snow ring in consideration of damage.

  The difficult snow ring removal tool according to the present invention is for removing the hard snow ring attached to the overhead wire and attached to the overhead wire, and is combined with the circumference of the side surface of the overhead wire. A first overhead wire gripping member made of a cylindrical body capable of covering the entire region in the direction, and in the circumferential direction of the side surface of the overhead wire on the opposite side of the hard snow ring with respect to the first overhead wire gripping member A second overhead wire gripping member comprising a contact portion that contacts a partial area along the side, and a wedge blade portion extending from the contact portion toward the first overhead wire gripping member, and the first overhead wire gripping Between the member and the second overhead wire gripping member and between the difficult snow ring and the second overhead wire gripping member when mounted on the overhead wire, and in the axial direction of the overhead wire The difficult snow ring is moved along the second overhead wire A movable member for pressing the ring that presses toward the holding member side, and the first overhead wire gripping member and the second overhead wire gripping member are connected to each other while maintaining a constant distance, A fixed connecting member in which a long hole extending along the axial direction is formed, and a long hole that connects the second overhead wire gripping member and the end portion in the longitudinal direction and extends in the longitudinal direction to an intermediate vicinity in the longitudinal direction This long hole is connected to the long hole of the fixed connecting member via a pin formed on the ring pressing movable body, and swings with the connecting portion with the second overhead wire gripping member as a fulcrum. And a link mechanism that transmits power for moving along the axial direction of the overhead wire from the movable connection member to the ring pressing movable member. (Claim 1).

  The overhead wire here includes, in addition to communication wires such as electric wires and optical fiber cables, all overhead wires that are installed outdoors in an aerial state and are predicted to snow. The same applies to the following overhead lines. Further, the first overhead wire gripping member and the ring pressing movable member are formed of an annular body having an inner diameter dimension slightly larger than the outer diameter dimension of the overhead wire in a state where a part of the radial direction is opened and closed. It has a simple structure for mounting from the radial direction. Furthermore, the second overhead wire gripping member also has a groove part that is cut out in a semicircular shape when viewed from the axial direction of the overhead wire. For example, the radial attachment to the overhead wire is simple and uses its flexibility. Thus, it is possible to move away from the overhead line. An operating lever is provided at the end of the movable connecting member opposite to the side connected to the second overhead wire gripping member. By operating this operating lever, the peripheral edge of the elongated hole of the movable connecting member The part presses the pin of the ring pressing movable member toward the second overhead wire holding member, and in response to this, the ring pressing movable member directs the hard-to-snow ring to the wedge blade portion of the second overhead wire holding member. Since it pushes, the difficult snow ring is broken by the wedge blade.

  Thereby, it is possible to attach the first overhead wire gripping member, the second overhead wire gripping member, and the ring pressing movable member constituting the tool for removing the difficult snow ring to the overhead wire in a relatively simple procedure. It is. Further, the hard snow ring can be broken by the wedge blade only by operating the operation lever. Furthermore, since the hard snow ring moves toward the wedge blade portion, the overhead wire is not damaged by the wedge blade portion. The ring can be removed after the electric wire with the ring attached is removed.

  The first overhead wire gripping member loosely sandwiches the circumferential surface of the overhead wire from the circumferential direction, and the ring pressing movable member is slidably attached to the overhead wire, In particular, it is possible to move along the overhead line without loosening the gripping state on the overhead line, and the second overhead line gripping member is in contact with only a part of the overhead line and moves so that the groove portion is separated from the next. Since it is possible to get over the hard-to-fall snow ring, after breaking the hard-to-fall snow ring with the wedge blade part, along the axial direction of the overhead line trying to break the other hard-to-fall snow ring located on the same overhead line axial direction The operation of moving the tool for removing the difficult snow ring can also be simplified.

  Further, the ring pressing movable member may contain a pair of rollers that sandwich the overhead wire from both radial sides (Claim 2). As a result, the roller rotates in such a manner as to push the overhead wire toward the first overhead wire gripping member, so that the movement of the ring pressing movable member along the axial direction of the overhead wire can be made smooth.

  Still further, the ring pressing movable member may be provided with a receiving portion for receiving a hard snow ring that breaks and falls. Thereby, the operation | work which collect | recovers the difficult snow ring which fell to the ground surface etc. becomes unnecessary, and efficiency improvement of the whole work relevant to removal of a difficult snow ring is achieved.

Moreover, the tool for removing a difficult snow ring according to the present invention is for removing the difficult snow ring attached to the overhead wire and attached to the overhead wire, and is a first overhead wire for gripping the overhead wire. A housing having a gripping portion and a second gripping portion for gripping the overhead wire on the same side of the hard-to-fall snow ring with respect to the first overhead wire gripping portion, and an axial direction of the overhead wire in the housing And has a wedge blade portion extending toward the housing side at the axial tip and a rack formed on the surface side of the housing. A ring breaking movable body, a main gear that is rotatably attached to a surface that intersects the surface of the casing, and a rotary gear that is rotatably attached to a surface that intersects the surface of the casing and meshes with the main gear. Along with the ring breakable movable A gear that is engaged with the teeth of the rack, and that transmits power for moving the ring breaking movable body along the axial direction of the overhead wire from the main gear through the driven gear and the rack. And a mechanism (claim 4).

  In this gear mechanism, the outer diameter of the driven gear may be larger than the outer diameter of the main driving gear. For example, the rotational force of the main driving gear of the gear mechanism can be transmitted from the power source through the power transmission means, and the transmission of power to the main driving gear can be controlled ON / OFF with an operation button or the like. Like that. Accordingly, an electric screwdriver or the like is connected to the main driving gear, and the operation button is turned on to apply a rotating force to the main driving gear, whereby the driving force is transmitted from the main driving gear to the driven gear. The ring breaking movable body meshes with the rack, and the ring breaking movable body advances along the axial direction of the overhead wire toward the housing side, so that the wedge blade portion provided at the axial tip of the ring breaking movable body is Since it moves toward the hard snow ring, the hard snow ring can be broken by the wedge blade only by connecting an electric screwdriver or the like to the main gear and operating the operation button or the like.

  The first overhead wire gripping portion and the second overhead wire gripping portion of the housing are loosely sandwiched by surrounding the circumferential surface from the circumferential direction with respect to the overhead wire. It is possible to move along the overhead line without loosening the cable, and to make the tip part having the wedge blade portion of the movable body for breaking the ring flexible in the direction of approaching the overhead line. Since it is possible to get over the snow ring, it is difficult to break along the axial direction of the overhead wire by trying to break another difficult snow ring that is located on the same axial direction of the same overhead line after breaking it with the wedge blade. The operation of moving the snow ring removal tool can also be simplified.

  As described above, according to the first to fourth aspects of the present invention, the members constituting the snow-removing ring removal tool can be made relatively simple, and the weight thereof can be relatively increased. Can be reduced. Further, according to the first to fourth aspects of the present invention, it is possible to move the operation lever to move the movable connecting member, or to turn on the operation button, etc. Since it is possible to ensure the breakage, no skill is required to operate the tool for removing the difficult snow ring, so the person who removes the difficult snow ring is not limited, and it is difficult to snow. The safety of the ring removal work can be increased. Furthermore, according to the invention described in claims 1 to 4, after the hard snow ring is broken at the wedge blade portion, another hard snow ring located on the axial direction of the same overhead wire is going to be broken. The operation of moving the hard snow ring removal tool along the axial direction of the overhead line can be simplified.

  Then, according to the first to third aspects of the invention, the first overhead wire gripping member, the second overhead wire gripping member, and the ring pressing movable member can be connected to the overhead wire in a relatively simple procedure. Since it can be possible to mount, it is possible to shorten and simplify the mounting time of the tool for removing the difficult snow ring to the overhead wire.

  In particular, according to the first aspect of the present invention, the hard snow ring moves toward the wedge blade portion, so that the overhead wire can be prevented from being damaged by the wedge blade portion.

  In particular, according to the second aspect of the invention, the pair of rollers housed in the ring pressing movable member rotates in the form of pushing out toward the first overhead wire gripping member holding the overhead wire. Can be smoothly moved along the axial direction of the overhead line.

  In particular, according to the invention described in claim 3, since it is possible to collect the broken snow-falling ring before it falls on the ground surface, etc., after working on a pole such as a power pole, Thus, there is no need to search for and collect a snowfall ring that has fallen around the area, and the efficiency of the entire work related to removal of the snowfall ring can be improved.

FIG. 1 is an explanatory view showing a configuration in a first embodiment of a tool for removing a difficult snow ring according to the present invention, and FIG. 1 (a) shows the whole tool for removing a difficult snow ring according to the first embodiment. FIG. 1 (b) is a front view showing an overall view of the tool for removing a difficult-to-attach snow ring as seen from the first overhead wire gripping member side, and FIG. The rear view which shows the whole view which looked at the tool for snow ring removal from the 2nd overhead wire holding member side, FIG.1 (d) is the side view of the whole tool for snow-removal ring removal same as the above, FIG. e) It is a front view which shows the state which looked at the 2nd overhead wire holding member of the tool for removal of a difficult snow ring according to the above from the wedge blade part side. 2A and 2B are explanatory views showing a state in which the removal tool for the difficult snow ring is attached to the overhead wire, FIG. 2A is a plan view thereof, and FIG. 2B is a side view thereof. FIG. 3 is an explanatory view showing a state in which the ring pressing movable member of the tool for removing a difficult-to-snow ring is abutted against the difficult-to-snow ring by operating the operation lever, and FIG. FIG. 3B is a side view of the plan view. FIG. 4 is an explanatory view showing a state in which the hard snow ring is inserted into the wedge blade portion of the second overhead wire gripping member of the tool for removing the hard snow ring as described above by further operating the operation lever and is broken. FIG. 4 (a) is a plan view thereof, and FIG. 4 (b) is a side view of the same, and is an explanatory view showing a state in which a broken snow-removing ring is dropped. FIG. 5 shows that the second hard wire gripping member is moved over the next hard snow ring while moving the hard snow ring removal tool to the next hard snow ring side to break the next hard snow ring. It is explanatory drawing which shows the state which is going to be made to do. FIG. 6 is an explanatory view showing a state in which the broken snow-receiving ring receiving portion is attached to the ring pressing movable member of the above-mentioned snow-falling ring removal tool. FIG. 7 is an explanatory view showing the configuration of the second embodiment of the tool for removing a difficult snow ring according to the present invention, and FIG. 7 (a) is a side view thereof and is prepared for the next hard snow ring. FIG. 7 (b) is a plan view showing an arrangement for overcoming the difficult snow ring. FIG. 8 is an explanatory view showing an operation for breaking and removing the difficult snow ring in the tool for removing a difficult snow ring same as the above, and FIG. 8 (a) is for breaking the difficult snow ring. FIG. 8B is a side view showing a state in which the wedge blade portion formed on the ring-breaking movable body constituting the tool for removing the difficult-to-snow ring is advanced to the difficult-to-snow ring, and FIG. It is the side view which showed a mode that the movable body for a ring breakage was advanced in the reverse direction to Fig.8 (a) in order to remove a difficult snow ring.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  A first embodiment of a tool for removing a difficult snow ring according to the present invention is shown in FIGS. This tool for removing a snow ring has a plurality of snow rings 2 attached in order to make it difficult to snow on an overhead wire 1 such as an electric wire or the like that is likely to snow in the outdoors. As shown particularly in FIG. 1, the overhead wire gripping member 4, the overhead wire gripping member 5, the ring pressing movable member 6, the overhead wire gripping members 4, 5 and the ring press The movable member 6 is appropriately connected and is basically constituted by a link mechanism 7 including a base member 8, a fixed connecting member 9 and a movable connecting member 10 which are also connected to each other.

  The overhead wire gripping member 4 is for gripping the overhead wire 1, and as shown in FIG. 1 (b) in particular, its circumferential direction with respect to the overhead wire 1 having a substantially circular cross section when viewed from the axial direction. Is basically composed of a cylindrical body having a hole-like internal space 12 having an inner diameter that is the same as or larger than the outer diameter of the overhead wire 1. The overhead wire gripping member 4 having the hole-like internal space 12 is formed by abutting the gripping piece 13 and the gripping piece 14 from the radial direction of the overhead wire 1. In this embodiment, the gripping piece 13 and the gripping piece 14 is formed in half. That is, the gripping piece 13 and the gripping piece 14 are mainly formed by semicircular arc-shaped wall portions with respect to the hole-shaped internal space 12.

  And the gripping piece 13 and the gripping piece 14 are the cyclic | annular opening-and-closing connection which the edge parts of the one end extended along the axial direction of the hole-shaped internal space 12 among the said gripping pieces 13 and 14 penetrate the edge parts, for example. The other end portions extending along the axial direction of the hole-shaped inner space 12 of the gripping pieces 13 and 14 can be swung in a direction in which the opening and closing connection tool 15 is a fulcrum. It has become. However, the means for connecting the gripping piece 13 and the gripping piece 14 is not limited to the opening / closing connector 15 described above, but is a hinge or a connecting part having flexibility and having a substantially U-shaped or V-shaped cross section. Etc. may be used.

  In addition, the gripping piece 13 and the gripping piece 14 are formed on the side of the gripping pieces 13 and 14 opposite to the side having the opening / closing connector 15 on the side extending along the axial direction of the hole-shaped internal space 12. A protruding piece 16 and a protruding piece 17 extending radially outward of the inner space 12, and the protruding piece 16 of the gripping piece 13 and the protruding piece 17 of the holding piece 14 are in a position where they face each other and come into contact with each other And Then, as shown in FIG. 1A, slits 18 extending from the side toward the main bodies of the gripping pieces 13 and 14 are formed in the protruding pieces 16 and 17. Furthermore, the protruding piece 16 of the holding piece 13 and the protruding piece 17 of the holding piece 14 are brought into contact with each other, and the slits 18 of both are made to communicate with each other so that one holding piece (the holding piece 14 in this embodiment) side or the slit. A bolt 19 with a knob portion is inserted from the opening side of 18, and a nut 20 is externally inserted into the bolt 19 protruding from the other gripping piece (the gripping piece 13 in this embodiment). Thereby, the protruding piece 16 of the gripping piece 13 and the protruding piece 17 of the holding piece 14 are fixed securely and firmly.

  With such a configuration of the overhead wire gripping member 4, it is possible to move the overhead wire gripping member 4 along the axial direction of the overhead wire 1 even when the nut 20 is loosened or held as it is while gripping the overhead wire 1.

  The overhead wire gripping member 5 is for gripping the overhead wire 1 and breaking the hard-to-fall snow ring 2, and as shown in FIGS. 2 to 4, when the overhead wire gripping member 5 is attached to the overhead wire 1, On the other hand, it is arranged on the opposite side to the hard snow ring 2 and the ring pressing movable member 6 described in detail later. The overhead wire gripping member 5 includes at least a contact portion 22 that contacts the overhead wire 1 and a wedge blade portion 23 that is integrally formed with the contact portion 22 as shown in FIG. Yes.

  Among these, as shown in FIG. 1C, the contact portion 22 has a groove portion 24 that is recessed in a semicircular shape when viewed from the axial direction of the overhead wire 1, and the groove portion 24 extends in the axial direction of the overhead wire 1. It extends along the inner diameter, and the inner diameter is the same as or slightly larger than the outer diameter of the overhead wire 1. Thus, by placing the contact portion 22 on the overhead wire 1 so that the overhead wire 1 is accommodated in the groove portion 24, the contact portion 22 abuts on a part of the side surface of the overhead wire 1 along the circumferential direction. Can be gripped.

  In addition, the wedge blade portion 23 has a groove portion 25 having an inner surface that continues as it is from the inner surface of the groove portion 24 of the contact portion 22, and the side opposite to the groove portion 25 extends from the contact portion 22 side to the side surface of the overhead wire 1. It has the inclined surface inclined toward. As a result, the wedge blade portion 23 has a wedge shape when the wedge blade portion 23 is viewed from the system direction of the overhead wire 1. The point of the wedge blade portion 23 can enter between the side surface of the overhead wire 1 and the inner peripheral surface of the difficult snow ring 2 attached to the overhead wire 1. In addition, the inclined surface of the wedge blade portion 23 is not constituted by one plane or a curved surface, and a plurality of (for example, six surfaces in this embodiment) substantially rectangular shape as shown in FIG. Alternatively, a substantially trapezoidal surface and a plurality of (four surfaces in this embodiment) substantially triangular surfaces may be combined.

  For example, as shown in FIGS. 1 (a), 1 (b), and 1 (d), the ring pressing movable member 6 is configured such that the hard-to-fall ring 2 is placed on the overhead wire gripping member 5 side, in particular its wedge blade portion. A cylindrical body 28 having a hole-like inner space 27 having an inner diameter dimension larger than the outer diameter dimension of the overhead wire 1 and smaller than the outer diameter dimension of the hard-to-attach snow ring 2, Two rollers 29 and 30 extending in the direction intersecting the axial direction of the hole-shaped internal space 27 with respect to the cylindrical body 28, preferably in the radial direction of the hole-shaped internal space 27, and the outer side surface of the tube-shaped body 28 are formed. The pin 31 is basically configured.

  Of these, the cylindrical body 28 is formed by abutting the covering member 28a and the covering member 28b from the radial direction of the overhead wire 1. In this embodiment, the covering member 28a and the covering member 28b are divided in half. It is formed in the state. That is, the cover member 28 a and the cover member 28 b are mainly formed by semicircular arc-shaped wall portions with respect to the hole-shaped internal space 27. A flange extending toward the center of the opening of the hole-shaped internal space 27 may be formed on the side of the hard snow ring 2 in the opening of the hole-shaped internal space 27 of the cylindrical body 28. The contact / pressing area between the movable member 6 and the hard-to-snow ring 2 is relatively enlarged.

  And the covering member 28a and the covering member 28b are the cyclic | annular opening-and-closing connection which the edge parts of the one end extended along the axial direction of the hole-shaped internal space 27 among the said covering members 28a and 28b insert the edge parts, for example. The other end portions extending along the axial direction of the hole-shaped internal space 27 of the covering member 28a and the covering member 28b with the opening / closing connector 15 serving as a fulcrum are thereby swung in a direction in which the other end portions are closer to each other. It is possible to move. However, it is the same as the opening / closing connector 15 that connects the previous gripping piece 13 and the gripping piece 14 that a hinge or the like may be used instead of the opening / closing connector 15.

  Further, the covering member 28a and the covering member 28b are on the opposite side of the covering member 28a and the covering member 28b from the side having the opening / closing connector 15 in the end portion extending along the axial direction of the hole-shaped internal space 27. In addition, projecting pieces 32 and 32 extending outward in the radial direction of the hole-shaped internal space 27 are provided, and the projecting pieces 32 and 32 are in positions where they face each other and come into contact with each other. Then, as shown in FIG. 1A, a slit 33 extending from the side toward the main body of the cylindrical body 28 is formed in the protruding piece 32. Further, the projecting piece 32 of the cover member 28a and the projecting piece 32 of the cover member 28b are brought into contact with each other so that the slits 33 are communicated with each other, and one of the cover members (the cover member 28a in this embodiment) side or the slit. A bolt 19 with a knob portion is inserted from the opening side of 33, and the nut 20 is externally inserted into the bolt 19 protruding from the other cover member (cover member 28b in this embodiment). Thereby, the protrusion piece 32 of the cover member 28a and the protrusion piece 32 of the cover member 28b are fixed reliably and firmly.

  The roller 29 is provided on the cover member 28 a side of the ring pressing movable member 6, and the roller 30 is provided on the cover member 28 b side of the ring pressing movable member 6. Is arranged so that when the cover member 28a and the cover member 28b are brought into contact with each other to form the cylindrical body 28, the two are parallel to each other and at an interval at which the overhead wire 1 can be loosely sandwiched therebetween. Yes.

  The pin 31 is connected to the link mechanism 7 and is formed at the central portion in the radial direction of the hole-shaped internal space 27 with respect to the cylindrical body 28. The outer diameter of the pin 31 is a fixed connecting member to be described later. 9 is substantially the same as the width in the short direction of the long hole 35 and the width in the short direction of the long hole 36 of the movable connecting member 10, so that the pin 31 is relatively aligned along the long direction of the long holes 35, 36. It can be rubbed.

  The link mechanism 7 is for changing the movable connecting member 10 along the axial direction of the overhead wire 1. As shown in FIG. 1, the base member 8 fixed to the contact portion 22 of the overhead wire gripping member 5. And a fixed connecting member 9 connected to the base member 8 and connected to the ring pressing movable member 6 through the pin 31 and the long hole 35, and connected to the base member 8 and the pin 31 and The movable connecting member 10 is connected to the ring pressing movable member 6 through the long hole 36 at least.

  Of these, the base member 8 is an elongated straight flat plate, and is fixed to the contact portion 22 of the overhead wire gripping member 5 via the fixture 37 so that the longitudinal direction thereof is perpendicular to the axial direction of the overhead wire 1. Has been. That is, the base member 8 does not swing around the fixture 37.

  The fixed connecting member 9 is a flat and thin plate that is bent into three, and one end portion in the longitudinal direction is connected to one end portion in the longitudinal direction of the base member 8 via the fixture 38 and The other end portion in the longitudinal direction is connected to the protruding piece 17 of the overhead wire gripping member 4, and accordingly, the distance between the overhead wire gripping member 4 and the overhead wire gripping member 5 is also fixed. . The central part of the fixed connecting member 9 in the longitudinal direction has a part extending along the axial direction of the overhead line 1 along the overhead line 1, and the long hole 35 extends in the axial direction of the overhead line 1 at this part. Is formed. Thereby, the pin 31 of the ring pressing movable member 6 moves along the longitudinal direction of the long hole 35 of the fixed connecting member 9 while being rubbed against the side peripheral edge of the long hole 35, thereby moving the ring pressing movable member 6. The overhead wire 1 can be moved along the axial direction toward the overhead wire gripping member 5 and the overhead wire gripping member 4.

  In this embodiment, the movable connecting member 10 is in the form of an elongated straight plate, and one end portion in the longitudinal direction thereof is rotatably connected to the base member 8 via the rotating shaft 39, and A long hole 36 extending linearly is formed in the central portion in the longitudinal direction. The movable connecting member 10 is provided with an operation lever 40 that can be grasped by a human hand on the side opposite to the side having the rotation shaft 39 in the longitudinal direction. In this embodiment, when the reference line is taken along the axial direction of the movable connecting member 10 in this embodiment, the operation lever 40 is provided to be inclined toward the overhead wire gripping member 5 with respect to the reference line. A necessary force is applied to the movable connecting member 10 from the operation lever 40. The operation lever 40 may be formed with a groove or the like for preventing slipping.

  Based on the above configuration, the procedure for mounting the difficult snow ring removal tool to the overhead wire 1 and removing the difficult snow ring 2 according to the first embodiment will be described with reference to FIGS.

  First, the tool for removing the difficult snow ring is attached to the overhead wire 1. However, the overhead wire gripping member 4 and the ring pressing movable member 6 remove the bolt 19 and the nut 20 and support the opening / closing connector 15 as a fulcrum. When the gripping piece 13 and the gripping piece 14, the cover member 28 a and the cover member 28 b are swung on the side opposite to the opening / closing connector 15 and both ends are opened larger than the outer diameter of the overhead wire 1, the overhead wire The holding member 4 and the ring pressing movable member 6 are moved in the radial direction of the overhead wire 1. Accordingly, when the overhead wire 1 is positioned between the gripping piece 13 and the gripping piece 14 and between the covering member 28a and the covering member 28b, the gripping piece 13 and the gripping piece 14 are closed and the covering member 28a and the covering member 28b. Are closed with the bolt 19 and the nut 20, and the covering piece 13 and the holding piece 14 are fastened and the covering member 28 a and the covering member 28 b are fastened. Thereby, the mounting of the overhead wire gripping member 4 and the ring pressing movable member 6 to the overhead wire 1 is completed. Note that the removal of the overhead wire gripping member 4 and the ring pressing movable member 6 from the overhead wire 1 may be performed by performing a procedure reverse to the above procedure.

  When the overhead wire gripping member 5 is brought close to the overhead wire 1 from the groove portion 24 side of the contact portion 22 and the groove portion 25 side of the wedge blade portion 23 in the radial direction, the attachment to the overhead wire 1 is completed. That is, in a state where the overhead wire gripping member 5, the overhead wire gripping member 4, and the ring pressing movable member 6 are integrally connected, the overhead wire gripping member 4 and the ring pressing movable member 6 are moved in the radial direction of the overhead wire 1. From the groove portion 24 of the contact portion 22 of the overhead wire gripping member 5 and the groove portion 25 side of the wedge blade portion 23.

  Thereby, the tool for removing a difficult snow ring according to the first embodiment does not require extensive preparation when being attached to and removed from the overhead wire 1 like the difficult snow ring removing device shown in the publicly known literature. In addition, since the difficult-to-attach ring 2 can be mounted while the overhead wire gripping member 4 and the ring pressing movable member 6 and the overhead wire gripping member 5 are positioned, the entire removal operation of the difficult-to-attach snow ring is possible. And the burden on the entire removal work of the difficult snow ring can be reduced.

  Next, the difficult snow ring 2 is removed, and the operation lever 40 is illustrated with a slight gap between the ring pressing movable member 6 and the hard snow ring 2 as shown in FIG. When the movable connecting member 10 connected to the operation lever 40 is rotated about the rotation shaft 39 in the direction of the white arrow by moving as indicated by the white arrow 2, the elongated hole 36 of the movable connecting member 10 is rotated. The side peripheral edge of the pin 31 pushes the pin 31. The pin 31 varies only along the longitudinal direction of the long hole 35 of the fixed connecting member 9. Therefore, the ring pressing movable member 6 that is inseparable from the pin 31 moves in the direction of the arrow in FIG. 2 along the axial direction of the overhead wire 1 and hits the difficult snow ring 2 as shown in FIG. Touch.

  Further, by moving the operation lever 40 as indicated by the white arrow in FIG. 3, the movable connecting member 10 rotates about the rotation shaft 39, and the lateral peripheral edge of the long hole 36 of the movable connecting member 10 is the pin 31. 3, the ring pressing movable member 6 moves in the direction of the arrow in FIG. 3 while pressing the hard snow ring 2 along the axial direction of the overhead wire 1, and as shown in FIG. Since the tip of the wedge blade portion 23 of the overhead wire gripping member 5 enters the gap between the overhead wire 2 and the overhead wire 1, the hard snow ring 2 is broken and dropped as shown in FIG. 4.

  As a result, it is possible to break the difficult snow ring 2 and remove it from the overhead line 1 only by moving the operation lever 40, so that no skill is required for removing the difficult snow ring and anyone can work. It is possible, and the safety of work can be improved. In addition, since the hard snow ring 2 is moved closer to the wedge blade portion 23 side, the overhead wire 1 can be prevented from being damaged by the wedge blade portion 23.

  Further, in the work for removing the next hard-to-snow ring 2, when the overhead wire gripping member 4 loosely holds the overhead wire 1 in the first place by loosening the bolt 19, the shaft of the overhead wire 1 is used as it is. The ring pressing movable member 6 can be moved along the axial direction of the overhead wire 1 by the rotation of the rollers 29 and 30 sandwiching the overhead wire 1. Further, as shown in FIG. 5, the overhead wire gripping member 5 can be lifted from the overhead wire 1 by being lifted in the direction of the thick line arrow and can get over the next difficult snow landing ring 2. It can be moved along the axial direction of the overhead wire 1. Thereby, it is possible to move the next hard snow ring 2 to the position where the hard snow ring 2 is removed without remounting the hard snow ring removal tool to the overhead wire 1.

  Further, as shown in FIG. 6, even if the receiving portion 41 is provided by forming an L-shaped extending portion 42 on the ring pressing movable member 6 and attaching a net portion 43 to the extending portion 42. good. Thereby, since the difficult snow ring 2 broken by the wedge blade part 23 can be received by the receiving part 41, the collection work of the hard snow ring 2 which has fallen to the ground surface becomes unnecessary.

  7 and 8 show a second embodiment of the tool for removing a difficult snow ring according to the present invention. The hard snow ring removal tool includes a casing 45 having a hollow inside, a ring breaking movable body 53 movably connected to the casing 45 along the axial direction of the overhead wire 1, and the ring. The breaking movable body 53 includes at least a gear mechanism 60 that transmits power for moving along the axial direction of the overhead wire 1.

Of these, the housing 45 includes a hole-like overhead wire gripping portion 46 that grips the overhead wire 1 and a hole-like gripping portion 47 that grips the overhead wire 1 on the same side of the hard-to-attach snow ring 2 with respect to the overhead wire gripping portion 46. And a pin 52 for connecting to the ring breaking movable body 53 is provided on the upper side surface along the axial direction of the overhead wire 1. The casing 45 can be divided into a plurality of parts at a predetermined part, and the casing 45 can be attached to the overhead line 1 by combining the overhead lines 1 so as to fit in the overhead line gripping part 46 and the overhead line gripping part 47. good.

  The ring-breaking movable body 53 has a wedge blade portion 55 on one side in the longitudinal direction of the flat plate portion that also serves as the axial direction of the overhead wire 1 while being based on a substantially flat plate portion having a slight width. . The wedge blade portion 55 is bent so that the tip thereof faces the housing 45 side, and a plurality of blades 57 are formed at the back tip portion. In the ring breaking movable body 53, the width in the short direction of the flat plate portion that is also the radial direction of the overhead wire 1 is larger than the lateral width of the housing 45, and in the radial direction of the overhead wire 1 than the housing 45. On the lower surface side of the projecting portion, a rack 58 is formed which is made up of irregularities that mesh with the teeth of the driven gear 50 described below. Further, the ring breaking movable body 53 has an elongated slide hole 54 that extends linearly along the axial direction of the overhead wire 1 in the flat plate portion, and this slide hole 54 engages with the pin 52 of the housing 45. Accordingly, the movement of the ring breaking movable body 53 can be restricted only in the direction along the axial direction of the overhead wire 1.

  The gear mechanism 60 is attached to a side surface of the housing 45 along the axial direction of the overhead line 1. The gear mechanism 60 receives a power from a power source and has a larger outer diameter than the main gear 48. The teeth of the gear 48 and the driven gear 50 to which power is transmitted from the main driving gear 48 by meshing the teeth. The main driving gear 48 is formed with a recess 49 for insertion in this embodiment, and a rotational force supply body 51 such as an electric screwdriver can be attached to the recess 49.

  Based on the above configuration, FIG. 7, FIG. 8 (a) and FIG. 8 (b) are shown for the procedure of breaking and removing the hard snow ring 2 by the tool for removing the hard snow ring according to the second embodiment. It explains using.

  First, the rotational force supply body 51 such as an electric screwdriver is attached to the recess 49 of the main driving gear 48, and the main driving gear 48 is rotated clockwise as indicated by the arrow in FIG. As a result, the driven gear 50 rotates counterclockwise so as to be in the opposite direction to the rotation of the main driving gear 48, as indicated by the arrow direction in FIG. 8A, so that the rack meshes with the teeth of the driven gear 50. Since the ring breakable movable body 53 having 58 moves in the direction of the white arrow in FIG. 8A so as to approach the difficult snow ring 2, the wedge blade portion 55 has the difficult snow contact of FIG. 7. Since the tip of the wedge blade portion 55 of the ring breaking movable body 53 enters the gap between the hard-to-snow ring 2 and the overhead wire 1 as shown in FIG. A plurality of broken portions 57 as shown in (b) are formed on the difficult-to-snow ring 2, and the difficult-to-snow ring 2 is broken.

  Next, a counterclockwise rotation shown in the direction of the arrow in FIG. 8B is applied to the main driving gear 48 from a rotational force supply body 51 such as an electric screwdriver. As a result, the driven gear 50 rotates clockwise so as to be in the opposite direction to the rotation of the main driving gear 48 as shown by the arrow direction in FIG. Since it moves away from the difficult snow ring 2 in the direction of the white arrow 8 (b), the wedge blade part 55 also returns to a state away from the hard snow ring 2 and is broken. Can be removed.

  Thereby, the hard snow ring 2 can be broken and removed from the overhead wire 1 only by inserting the rotational force supply body 51 such as an electric screwdriver into the recess 49 of the main driving gear 48 and rotating it in a predetermined direction. Therefore, even with the tool for removing a difficult snow ring according to the second embodiment, no skill is required for removing the difficult snow ring, anyone can work, and the work safety is also improved. Can do.

  Further, by giving the flat plate-like portion of the ring-breaking movable body 53 in the direction that is closer to the overhead line 1, in order to break the next difficult snow ring 2, the housing 45 is moved in the axial direction. As shown in FIG. 7A, the side having the wedge blade portion 55 is bent in the direction away from the overhead line 1 and moved over the next difficult snow-attachment ring 2 while shifting the Even with the tool for removing a difficult snow ring according to the second embodiment, it is possible to move the next difficult snow ring 2 to a position where the next difficult snow ring 2 is removed without being attached to the overhead wire 1 again.

DESCRIPTION OF SYMBOLS 1 Overhead 2 Difficult snow ring 4 Overhead grip member (1st overhead wire gripping member)
5 overhead wire gripping member (second overhead wire gripping member)
6 Ring pressing movable member 7 Link mechanism 9 Fixed coupling member 10 Movable coupling member 23 Wedge blade portion 29 Roller 30 Roller 35 Long hole 36 Long hole 40 Operation lever 41 Receiving portion 45 Housing 46 Overhead gripping portion 47 Overhead gripping portion 48 Main movement Gear 50 Driven gear 51 Electric screwdriver 52 Pin 53 Ring breaking movable body 54 Slide hole 55 Wedge blade portion 56 Connection portion 58 Rack 60 Gear mechanism

Claims (4)

For removing the difficult snow ring attached to the overhead line and attached to the overhead line,
A first overhead wire gripping member made of a cylindrical body capable of covering the entire area in the circumferential direction with respect to the side surface of the overhead wire by combining,
The first overhead wire gripping member abuts against a part of the side surface of the overhead wire along the circumferential direction on the opposite side of the difficult snow ring and the first overhead wire from the contact portion. A second overhead wire gripping member comprising a wedge blade portion extending toward the gripping member side;
Arranged between the first overhead wire gripping member and the second overhead wire gripping member and also between the difficult snow ring and the second overhead wire gripping member when mounted on the overhead wire, A ring pressing movable member that presses the hard snow ring to the second overhead wire gripping member side by moving along the axial direction of the overhead wire;
The first overhead wire gripping member and the second overhead wire gripping member are connected to each other while maintaining a constant distance, and a long hole extending along the axial direction of the overhead wire is formed at a position near the middle in the longitudinal direction. The connecting member and the second overhead wire gripping member are connected to the end portion in the longitudinal direction, and a long hole extending in the longitudinal direction is formed in a portion near the middle in the longitudinal direction. A movable connecting member that is connected via a pin formed on the ring pressing movable body and swings about a connection portion with the second overhead wire gripping member, from the movable connecting member And a link mechanism for transmitting power for moving the ring pressing movable member along the axial direction of the overhead wire.   2. The tool for removing a difficult snow ring according to claim 1, wherein the ring pressing movable member stores a pair of rollers that sandwich the overhead wire from both radial sides thereof.   The removal tool for a difficult snow ring according to claim 1 or 2, wherein the ring pressing movable member is provided with a receiving portion for receiving the hard snow ring that is broken and dropped. For removing the difficult snow ring attached to the overhead line and attached to the overhead line,
A housing having a first overhead wire gripping portion for gripping the overhead wire and a second gripping portion for gripping the overhead wire on the same side of the hard-to-fall snow ring with respect to the first overhead wire gripping portion;
The housing is attached to a surface along the axial direction of the overhead wire so as to be movable in the axial direction of the overhead wire, and has a wedge blade portion extending toward the housing side at the axial end, and the housing. A ring breaking movable body having a rack formed on the surface side of the body;
A main driving gear rotatably attached to a surface intersecting the surface of the housing, and a rotatable gear rotatably attached to a surface intersecting the surface of the housing and meshing with the main driving gear, and the ring breaking movable body A gear that is engaged with the teeth of the rack, and that transmits power for moving the ring breaking movable body along the axial direction of the overhead wire from the main gear through the driven gear and the rack. A tool for removing a difficult snow ring, characterized by comprising a mechanism.

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