WO2019208650A1 - 碍子分離工法並びにこの工法で用いられる柱上吊上げ装置、碍子支持具、対電柱固定具及び掛吊具 - Google Patents
碍子分離工法並びにこの工法で用いられる柱上吊上げ装置、碍子支持具、対電柱固定具及び掛吊具 Download PDFInfo
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- WO2019208650A1 WO2019208650A1 PCT/JP2019/017478 JP2019017478W WO2019208650A1 WO 2019208650 A1 WO2019208650 A1 WO 2019208650A1 JP 2019017478 W JP2019017478 W JP 2019017478W WO 2019208650 A1 WO2019208650 A1 WO 2019208650A1
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- Prior art keywords
- insulator
- tool
- hanging
- tension
- wire
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
Definitions
- the present invention relates to an insulator separating method for separating a tension insulator from an installed electric wire, and a column lifting device, an insulator support, a counter column fixing tool, and a hanging tool used in this method.
- insulators are used to insulate between an overhead electric wire (hereinafter simply referred to as an electric wire) and a support structure.
- an electric wire hereinafter simply referred to as an electric wire
- a tension insulator is used when connecting to a supporting structure such as a utility pole or a steel tower in the tension direction of the electric wire.
- this tension insulator the form with which the some insulator was comprised in series by the metal fitting for connection is common.
- FIG. 23 shows a conventional method for replacing the tension insulator 317.
- a tension insulator 317 is disposed in the counter electrode direction via the arm metal 314.
- FIG. 23 shows how one of these is exchanged.
- a tension relaxation device 310 is used to relieve the tension applied to the tension insulator 317.
- the tension relaxation device 310 includes a tension support rod 311 that acts as a tension rod, and a tension operation member 312 that supports the tension support rod 311 in a swingable manner.
- tension support rod 311 One end of the tension support rod 311 is fixed to the arm metal 314 side, and the tension operation member 312 is connected to the high-voltage line 316 via the retention clamp 315.
- the tension operating member 312 when the tension operating member 312 is swung with respect to the arm metal 314 side, the tension applied to the tension lever 317 is released and the tension moves to the tension support rod 311 side. While maintaining this state, the tension insulator 317 is replaced.
- the removed tension insulator 317 is placed on the hanging tool 313 and removed.
- Such a tension insulator replacement method is described in Patent Document 1.
- the tension insulators 317 shown in FIG. 23 have a structure in which the two are integrally connected, but the number of tension insulators to be connected increases in a higher voltage facility.
- the individual tension insulators 317 are also enlarged. Therefore, when the configuration as shown in FIG. 23 is employed, the hanging tool 313 is also enlarged in accordance with the tension insulator 317 to be removed.
- the crane in addition to the tension insulator 317, it is necessary to provide a hanging tool 313 having a size corresponding to this.
- the crane is also required to have the ability to lift heavy objects, and an increase in the size of the equipment is inevitable.
- the present invention provides an insulator separating method that can safely separate a plurality of tension insulators installed at different heights without changing the position of the device used for work, and a column lifting device and an insulator support used in this method.
- An object is to provide a tool, a counter pole fixing tool, and a hanging tool.
- the insulator separating method of the present invention is an insulator separating method for separating a tension-resistant insulator from an overhead electric wire using a tensioning device and a pole lifting device, and in parallel with the insulator A step of switching the tension to the branch path including the formed wire drawing device, a step of supporting the insulator from below with an insulator support, and a wire rod for lifting the column lifting device on the insulator support A step of connecting, and a step of releasing the connection of the lever lifted by the column lifting device while being supported by the lever support.
- the step of switching the tension to the branch path includes the step of gripping the overhead wire at one end of the tension device, and the tension wire to the tension wire.
- a step of shrinking a distance between one end and the other end of the wire drawing device includes the step of gripping the overhead wire at one end of the tension device, and the tension wire to the tension wire.
- the column lifting device of the present invention is a column lifting device used in the above-described lever separating method, and the lever engaging portion engageable with the lever, and the lever engaging portion is suspended from the tip, An operation rod that indirectly operates the suspended lever engaging portion, and a direction changing tool that attaches the operation rod to a brace of a utility pole so that the direction of the operation rod can be changed are provided.
- the column hoisting device of the present invention has an insertion hole formed in the vertical direction in the direction changing tool, and an arm metal mounting portion that can be attached to the arm metal, and the arm metal It has an insertion part which is inserted in the insertion hole of the attachment part so that turning is possible, and provided with the turning part which has the operation rod fixing part which fixes the operation rod.
- the column hoisting apparatus of the present invention is provided with an upper contact portion that contacts the upper portion of the arm metal, and a lower portion that extends downward from the vicinity of the upper contact portion.
- an elevating part provided at the facing part in an arrangement capable of elevating toward the upper contact part.
- the column hoisting apparatus has a lower end edge of the arm metal made of angle steel with one surface arranged vertically downward on the hanging portion side of the elevating portion. It is characterized in that an end edge holding portion capable of inserting a lip is formed.
- the insulator support of the present invention is an insulator support used in combination with a column lifting device for lifting an insulator in the above-described insulator separating method, and a support rod having a grip at one end, and the support rod An insulator engaging portion provided at the other end and engageable with a connecting portion of the insulator, and a wire connecting portion provided between the insulator engaging portion and the holding portion and connectable with the wire rod It is characterized by comprising.
- the lever support of the present invention is characterized in that the position of the wire rod connecting portion can be changed between the lever engaging portion and the gripping portion.
- the counter pole fixing tool of the present invention is a counter pole fixing tool for fixing a wire drawing device for stretching an overhead electric wire to the power pole, which is used in the above-described insulator separation method, and the outer diameter of the power pole
- a curved portion formed in an arc shape with an elastic material having a similar inner diameter and exceeding a half circumference of the circumference of the utility pole; and a string-like body extending from one end of the curved portion; It is provided with the string hooking part which is provided in the other end of the said bending part, and penetrates the said string-like body.
- the counter pole fixing tool of the present invention is characterized in that the string-like body and the string-hanging portion are constituted by a single member along the curved portion.
- the hanging tool of the present invention is a hanging tool used in the above-described insulator separation method, and suspends the other end of a wire drawing device in which one end is held by an installed electric wire to the installed electric wire.
- Insulating rods having a connecting structure, at least one base fixed to the insulating rods, and two engaging bodies along a virtual plane spaced apart in parallel so as to oppose each other's electric wire housing side.
- a suspension portion pivotally supported so as to be rotatable about the space between the two engagement bodies with respect to the base portion.
- the insulator separation method of the present invention since the insulator is lifted through the insulator support connected to the column lifting device, the movable range in the height direction of the column lifting device, It is possible to lift the insulator to a height obtained by adding the length from the lifting position of the insulator support to the end. Thereby, even if it is a small column hoisting apparatus, the operation
- the tensioning device and the counter pole fixing tool are connected via the hanging tool suspended from the overhead electric wire.
- work which connects a counter pole fixing tool to a hanging tool can be performed separately. Thereby, it becomes possible to perform the work on the column in a stable state. Also, after switching the tension to the branch path, on the contrary, it is possible to suspend the overhead electric wire that has lost its tension with a hanging tool, so that the overhead electric wire when the insulator is separated is not held with a gripping tool etc. Even fall can be prevented.
- the pole lifting device of the present invention since the operating rod is attached to the brace via the direction changing tool capable of changing the direction, a wide range of work using the direction changing tool as a fulcrum can be performed flexibly. It becomes.
- the insertion hole and the insertion portion extending in the vertical direction are disposed so as to be relatively rotatable, so that the movement in the horizontal direction is stabilized.
- the arm bracket mounting portion is provided in three directions by the upper abutment portion, the hanging portion, and the facing portion among the four directions around the arm metal. And the upper part of the remaining one is blocked by the interval fixing part. Accordingly, when the interval fixing tool is opened, the arm metal can be easily accommodated. Further, when fixing the brace by applying pressure to the arm at the elevating part, it is possible to prevent the upper abutting part and the opposing part from being deformed and to effectively apply the pressing force by closing the interval fixing tool. It is possible to reduce the weight of the upper abutting portion as much as the strength can be expected by the interval fixing tool.
- one end of the angle steel extending vertically downward is stably directed to the suspended portion side by the edge holding portion into which the lower end edge of the angle steel is inserted. Can hold. Thereby, rotation of the column lifting device centering on the armrest can be prevented, and the load resistance against the work object can be improved.
- the support rod has the wire rod connecting portion for connecting the wire rod of the column lifting device between the gripping portion and the lever engaging portion.
- the support rod has the wire rod connecting portion for connecting the wire rod of the column lifting device between the gripping portion and the lever engaging portion.
- the wire rod connecting portion is configured to be capable of changing the position between the lever engaging portion and the gripping portion.
- the position can be selected according to the situation, and the work can be stabilized by adjusting the position of the center of gravity.
- the curved portion of the utility pole fixture is formed in an arc shape having a length exceeding the half circumference of the circumference of the utility pole. Can be installed.
- the curved portion is formed of an elastic member having an inner diameter that is approximately the same as the outer diameter of the utility pole, it can be easily temporarily fixed simply by being pushed into the utility pole with elastic deformation.
- the string-like body extended from one end of the curved portion can be shifted to a state in which it can be fixed by fastening only by passing it through the string-hanging portion at the other end. That is, it can be fastened and fixed to the utility pole by using a tension acting from the outside.
- the string-like body and the string hooking portion are formed of a single member along the curved portion, so that the load due to the tension is evenly distributed.
- the suspension portion is pivotally supported so as to be rotatable with respect to the base portion fixed to the insulating rod.
- the suspension portion is disposed so that the electric wire housing sides of the two engaging bodies are opposed to each other, and the engaging bodies are spaced apart in parallel.
- the overhead electric wire accommodated between the two engaging bodies of the suspension part can be engaged with the suspension part by rotation of 180 degrees or less.
- 3A is a left side view
- FIG. 4B is a central longitudinal sectional view taken along line AA of FIG. 3A. It is a direction changing tool in which the revolving part is configured to be detachable and the elevation angle is fixed, (a) is a front view, (b) is a rear view, (c) is a plan view, (d) is a bottom view, ( e) is a right side view, and (f) is a left side view.
- 5A is a left side view
- FIG. 5B is a central longitudinal sectional view taken along line BB shown in the left side view of FIG. 5A. It is a whole perspective view of the direction change tool of FIG. It is the whole perspective view which showed operation
- FIG. 4G is a perspective view.
- 10A is a left side view
- FIG. 10B is a central longitudinal sectional view taken along line CC of FIG. 10A
- FIG. 10C is a DD line of FIG. 10B.
- D is a cross-sectional view taken along line EE in (b)
- (e) is a right side view
- (f) is an operation explanatory view in plan view.
- FIG. 19 shows the suspended portion of the hanging tool of FIG. 18 and its periphery, (a) shows the opened state of the suspended portion, and (b) shows the engaged state of the suspended portion. It is a figure which shows the use condition of a counter pole fixing tool and a hanging tool.
- FIG. 21 is a jumper wire holder of FIG. 21, (a) is a plan view, and (b) is a longitudinal sectional view cut along line FF of (a).
- FIG. It is a figure which shows the conventional tension
- FIG. 1 shows an overall perspective view of a column lifting device 1.
- the column lifting device 1 includes a lever engaging portion 8 for hooking a tension-resistant lever 300 (to be described later with reference to FIG. 15), an operation rod 2 for operating the lever engaging portion 8, and the column lifting device 1.
- a direction changer 30 is provided for fixing itself to the arm 303 of the utility pole so as to be turnable.
- the operation rod 2 is hollow-molded with an FRP material, and is held at an intermediate position by a direction changing tool 30 described in detail later.
- An angle material, a square pipe material, or the like is used for the arm metal 303.
- the arm metal 303 made of an angle material will be described as an example.
- Such a column lifting device 1 is used for lifting not only the tension insulator 300 to be replaced but also other tools and equipment in the replacement work of the tension insulator 300 and the like.
- the insulator engaging portion 8 is suspended by the belt 4.
- the belt 4 extends inside the operation rod 2 and is wound up by a winding device 10 provided at an intermediate position.
- a ratchet handle 12 having a locking eyebolt 12a at the tip is attached to the winding device 10.
- the belt 4 can be wound or sent out by hooking the eyebolt 12a by remote control and moving it up and down.
- FIG. 2 shows a direction changing tool 30 with an elevation angle adjusting mechanism.
- the direction changer 30 includes a clamping part 32 (armrest mounting part) attached to the arm metal 303 and a turning part 50 that can be rotated horizontally relative to the clamping part 32.
- the clamping part 32 of the direction changing tool 30 is configured to be attachable to an arm metal 303 (see FIG. 1) made of an angle material.
- This clamping part 32 is comprised from the horizontal side clamping part 34 which fixes an angle material to a horizontal direction, and the vertical side clamping part 40 which fixes to a perpendicular direction.
- the horizontal holding portion 34 of the holding portion 32 has a substantially flat contact plate 34a that contacts the upper surface of the arm metal 303 (see FIGS. 2A and 2C).
- a horizontal guide hole 34b is formed in the contact plate 34a by three parallel long holes (see FIG. 2C).
- a locking claw 36 that is locked to the horizontal edge of the arm metal 303 is provided (see FIG. 2A).
- the locking claw 36 is fixed by a thumbscrew 37 that penetrates the central horizontal guide hole 34b among the three.
- Guide pins 38 for moving the locking claws 36 in parallel to the arm metal 303 are fitted in the horizontal guide holes 34b on both sides (see FIG. 2C). Thereby, the horizontal side clamping part 34 can be match
- the vertical side clamping part 40 of the clamping part 32 has the raising / lowering nail
- the raising / lowering claw portion 44 is configured to be movable up and down along a vertical guide hole 42a formed in a guide plate 42 arranged on both sides in the vertical direction.
- a screw shaft 46 is disposed through the center of the lifting / lowering claw portion 44 (see FIG. 2E).
- the lifting / lowering claw portion 44 is placed on a nut 48 attached to the lower end of the screw shaft 46. Therefore, the lifting / lowering claw portion 44 can be lifted and lowered by screwing the nut 48 back and forth with respect to the screw shaft 46.
- the guide plate 42 is shown as an example in which two guide plates 42 are provided on both sides of the lifting / lowering claw portion 44.
- the guide plate 42 is provided to prevent the lifting / lowering claw portion 44 from rotating together. It is sufficient that it is provided on either one of them.
- the position of the locking claw 36 of the horizontal side clamping part 34 is adjusted to the horizontal width of the arm metal 303 in advance.
- the contact plate 34a is placed on the upper surface of the arm metal 303 (temporarily fixed state). In this state, when the vertical clamping unit 40 provided in the vertical direction is tightened, the attachment to the arm bracket 303 is completed (mainly fixed state).
- the swivel unit 50 is provided above the above-described sandwiching unit 32, and includes a swivel mechanism that converts the direction of the operation rod 2 (see FIG. 1) in a horizontal plane and an elevation angle adjustment mechanism that adjusts the angle in the vertical direction. ing.
- a disk-like member parallel to the contact plate 34 a of the horizontal clamping unit 34 is formed below the turning unit 50.
- the swivel unit 50 can horizontally swivel around the center of the disk-shaped portion as a rotation axis.
- an operation rod fixing unit 52 for gripping and fixing the operation rod 2 is provided above the swivel unit 50.
- the operation rod fixing portion 52 has a space in which the operation rod 2 can be accommodated and gripped.
- the turning portion 50 is provided with an elevation angle adjustment portion 54 in order to adjust the elevation angle of the operation rod 2 held and fixed together with the operation rod fixing portion 52.
- a push-up bolt 54a is disposed so as to be able to advance and retract at a position where the above-described operation rod fixing portion 52 can be pushed up from below.
- the upper end of the push-up bolt 54a is rotatably connected to a connecting long hole 54b (indicated by a dotted line) formed below the operation rod fixing portion 52 through a connecting pin 54c.
- the connection pin 54c slides in the connection long hole 54b as the push-up bolt 54a moves up and down, and the elevation angle of the operation rod fixing portion 52 can be adjusted smoothly.
- the lower end of the push-up bolt 54a is formed in a hexagonal shape, the elevation angle can be easily adjusted by remotely operating the rotary tool from below.
- FIG. 3 shows a direction changing tool 60 that can be replaced with the direction changing tool 30 in FIG. 3A is a front view
- FIG. 3B is a rear view
- FIG. 3C is a plan view
- FIG. 3D is a bottom view
- FIG. 3E is a right side view
- FIG. It is the same as the direction changing tool 30 in FIG. 2 in that it is composed of a holding part 62 attached to the arm metal 303 and a turning part 70 that can be turned horizontally relative to the holding part 62.
- 4A is a left side view of the direction changer 60
- FIG. 4B is a central longitudinal sectional view taken along line AA shown in the left side view of FIG. 4A.
- the direction changing tool 60 will be described with reference to FIGS.
- the holding part 62 of the direction changing tool 60 is configured to be attachable to an arm metal 303 (see FIG. 1) made of an angle material or a square pipe material. Unlike the direction changing tool 30 in FIG. 2, the clamping unit 62 can be fixed to the arm metal 303 only by a vertical clamping mechanism.
- the clamping part 62 includes an upper contact part 64 that contacts the upper part of the arm metal 303, a lower contact part 66 that contacts the lower part of the arm metal 303, and a slide part 64b that guides the lower contact part 66 in the vertical direction. It has.
- the slide part 64 b is suspended from the upper contact part 64 along one side surface of the arm metal 303.
- the upper abutting portion 64 is provided with a cylindrical member having an insertion hole 64a formed vertically downward.
- an angle material holding portion 66a for holding the lower end of the angle metal arm 303 and a square pipe material holding portion 66b for holding the lower end of the square pipe material are formed on the upper side of the lower contact portion 66 of the clamping portion 62.
- an angle material holding portion 66a for holding the lower end of the angle metal arm 303 and a square pipe material holding portion 66b for holding the lower end of the square pipe material are formed on the upper side of the lower contact portion 66 of the clamping portion 62.
- a square pipe material holding portion 66b for holding the lower end of the square pipe material.
- the above-described sandwiching portion 62 can cope with two types of arm metal 303 made of an angle material and a square pipe material, and can be fixed only by a sandwiching operation in the vertical direction, thereby improving work efficiency.
- the swivel part 70 that can be attached to and detached from the clamping part 62 has an insertion part 74 that is rotatably inserted into the insertion hole 64a.
- fixed part 72 which fixes the operation rod 2 (refer FIG. 1) of the column lifting apparatus 1 is provided. Since the operation rod fixing portion 72 is provided to be bendable relative to the insertion portion 74, the elevation angle of the operation rod 2 can be changed.
- FIG. 5 shows a direction changer 90 that can be replaced with the direction changer 30 of FIG. 2 or the direction changer 60 of FIG.
- the turning unit 104 is configured to be removable, and the elevation angle is fixed.
- 5A is a front view
- FIG. 5B is a rear view
- FIG. 5C is a plan view
- FIG. 5D is a bottom view
- FIG. 5E is a right side view
- FIG. 5F is a left side view
- 6A is a left side view of the direction changer 90
- FIG. 6B is a central longitudinal sectional view taken along line BB shown in the left side view of FIG. 6A.
- FIG. 7 is an overall perspective view of the direction changing tool 90.
- FIG. 8 is an overall perspective view showing the operation of the movable part of the direction changing tool 90.
- FIG. 9 shows an exploded view of the direction changing tool 90. This will be described with reference to FIGS.
- the clamping part 92 of the direction changing tool 90 is configured to be attachable to an arm metal 303 (see FIG. 1) made of an angle material and a square pipe material, similarly to the direction changing tool 60 of FIG. Similar to the direction changer 60 in FIG. 3, the holding portion 92 (arm metal attachment portion) can be fixed to the arm metal 303 only by holding in the vertical direction.
- the sandwiching portion 92 is formed in a rectangular frame shape that is open on the side (left side of the paper).
- a portion of the frame-like member that contacts the upper surface of the arm metal 303 is referred to as an upper contact portion 94.
- a portion that hangs downward from the side of the upper contact portion 94 is defined as a suspending portion 96.
- a portion that extends in the horizontal direction from the hanging portion 96 and that faces the upper contact portion 94 is referred to as a facing portion 98.
- interval fixing tool 100 that connects the upper contact portion 94 and the facing portion 98 so as to close the space for accommodating the arm metal 303.
- the interval fixing device 100 is configured such that one end can be screwed to the upper contact portion 94. Thereby, the accommodation area
- an elevating part 102 is screwed to the facing part 98 so as to be able to advance and retreat toward the upper contact part 94.
- the elevating part 102 is composed of an eyebolt 102a and a contact plate 102b that is rotatably connected to the upper end of the eyebolt 102a.
- the facing portion 98 has a guide wall 98a for preventing the contact plate 102b from rotating together during the rotation operation of the eyebolt 102a of the elevating portion 102.
- the raising / lowering operation of the raising / lowering part 102 is performed in the range which cannot engage with this guide wall 98a (refer FIG. 7).
- the brace 303 (angle material) to be clamped and fixed is indicated by a dotted line.
- the contact plate 102 b of the elevating part 102 is formed with an edge holding part 102 c that can accommodate the lower edge of the arm metal 303 on both sides.
- the clamped brace 303 is stabilized.
- such an edge holding portion 102c is formed on both sides of the contact plate 102b, but it is sufficient that it is provided at least on the hanging portion side. By providing it on both sides, it can be attached to the arm metal 303 from any direction.
- the elevating part 102 is effective not only for the arm metal 303 made of angle material but also for the arm metal 303 made of square pipe material.
- the screw head portion 102d protrudes from the contact plate 102b.
- the screw head portion 102d is arranged in accordance with a mounting hole such as a pin insulator formed in the square pipe material. Then, it is possible to prevent the shift and to install stably. Further, if the screw head 102d is configured to be embedded in the contact plate 102b, the column lifting device 1 can be fixed at a position where no attachment hole is formed.
- the side opening is closed by the interval fixing tool 100, and the upper contact portion 94 and The distance from the facing portion 98 is fixed (see FIGS. 7 and 8).
- the column lifting device 1 is fixed to the arm metal 303 by raising the elevating part 102 from below and pinching the arm metal 303.
- the interval fixing tool 100 prevents the upper contact portion 94 and the facing portion 98 from opening due to deformation, and prevents the loss of the pressing force by the elevating portion 102.
- the interval fixing tool 100 that bears the tensile strength
- the standard required for the bending strength of the upper contact portion 94 can be lowered.
- the thickness of the upper contact portion 94 and the like can be suppressed without causing a decrease in strength, and the weight can be reduced.
- the operation rod fixing portion 106 of the turning portion 104 is configured to be able to open the space for accommodating the operation rod 2 (see FIG. 1) by a hinge mechanism. Similarly to 30, the position change in the longitudinal direction of the operating rod 2 can be easily performed even by remote control.
- the turning unit 104 is configured to be detachable from the holding unit 92.
- the insertion portion 108 of the turning portion 104 is inserted into the insertion hole 94a formed in the upper contact portion 94 of the sandwiching portion 92 so as to be horizontally turnable.
- an engaging groove 108a extending in the circumferential direction is formed at the center of the insertion portion 108 on the turning portion 104 side.
- a fixing pin 110 is arranged at an intermediate position of the insertion hole 94a of the upper contact portion 94 so as to be movable back and forth in a direction orthogonal to the insertion portion 108.
- the fixing pin 110 is biased toward the insertion portion by a spring member.
- the insertion portion 108 is locked by inserting the tip of the fixing pin 110 into the engagement groove 108a.
- a grip piece 112 that is operated by a lever mechanism is connected to the fixing pin 110.
- the lock can be released using a remote control yakko or the like. Since the engaging groove 108a is formed over the entire circumference of the insertion portion 108, it does not hinder the turning motion of the turning portion 104 even in the locked state.
- FIG. 10 shows the angle member fixture 120.
- 10 (a) is a front view, (b) is a rear view, (c) is a plan view, (d) is a bottom view, (e) is a right side view, (f) is a left side view, and (g) is a left side view. It is a perspective view.
- a brace 303a configured by combining two angle members is known.
- the arm metal 303a is configured by aligning the horizontal portions of the two angle members back to back and aligning the vertical portions in the same plane. A slight gap is formed between the two angle members.
- Such a brace 303a is indicated by a dotted line in FIG.
- the angle member fixture 120 includes an insertion plate 122 that is inserted into the gap between the two angle members.
- Support shafts 124 are provided on both sides of the insertion plate 122 in the vertical direction.
- An upper clamp 126 and a lower clamp 128 are provided so as to be rotatable about these two support shafts 124. Since the upper clamp 126 and the lower clamp 128 are configured to be mirror-symmetric with respect to the insertion plate 122, the upper clamp 126 will be described.
- the upper clamp 126 has an arm 126b that is rotatably provided around the support shaft 124, a fixing pin 126c that fixes the rotational position of the arm 126b, and an angle fixing screw that is screwed to the insertion plate 122 so as to be able to advance and retract.
- Fixing bolt 126a Since the fixing bolt 126a is provided with a ring-shaped engaging portion 126d on the opposite side to the insertion plate 122, the fastening operation can be performed by remote operation.
- FIG. 11A is a left side view of the angle member fixture
- FIG. 11B is a central longitudinal sectional view taken along the line CC of FIG. 11A
- FIG. 11C is FIG. ) Is a cross-sectional view taken along the line DD
- FIG. 11 (d) is a cross-sectional view taken along the line EE of FIG. 11 (b)
- FIG. 11 (e) is a right side view.
- FIG. 11F is a diagram showing the operation in plan view.
- positioning holes 124a are formed in the support shaft 124 every 90 degrees in the circumferential direction.
- the arms 126b and 128b are positioned by inserting the tips of the fixing pins 126c and 128c into any of the positioning holes 124a.
- the fixing pins 126c and 128c are not limited to be provided so as to be able to advance and retract with respect to the arms 126b and 128b, but are configured to be fixed to the arms 126b and 128b so as to be biased toward the support shaft 124 side. It doesn't matter. Since it is configured in this way, the arms 126b and 128b can be arranged in four directions as shown in FIG. 11 (f).
- the support shaft 124 of the angle member fixture 120 as described above is formed of a cylindrical material penetrating in the vertical direction as shown in FIG.
- the support shaft 124 has a configuration corresponding to the insertion hole 64a provided in the holding portion 62 of the direction changing tool 60 shown in FIG. Therefore, it can be used as a direction changing tool by inserting the insertion portion 74 of the turning portion 70 of the direction changing tool 60 of FIG. Similarly, it is possible to combine the swivel unit 104 of the direction changer 90 of FIG.
- FIG. 12 is a perspective view of an insulator support 150 according to the present invention.
- the insulator support 150 has a support bar 152.
- One end of the support bar 152 has a gripping portion 152a, and the other end has a lever engaging portion 154 attached thereto.
- the lever engaging portion 154 will be described in detail later with reference to FIG.
- a linear member connecting part 158 capable of connecting the belt 4 (wire member) of the column hoisting device 1 (see FIG. 1) is provided.
- the wire rod connecting portion 158 will be described later with reference to FIG.
- draining portions 160 On the top and bottom of the wire rod connecting portion 158, there are provided draining portions 160 for dividing the flow of raindrops.
- FIG. 13 is an enlarged view of the lever engaging portion 154 attached to the lever support 150 of FIG.
- the lever engaging portion 154 includes a hook-shaped portion 154a formed in a U-shape and a closing portion 156 that closes the opening of the hook-shaped portion 154a.
- a suspension hole is formed in one of the U-shaped end portions of the bowl-shaped portion 154a.
- the hook-shaped portion 154a is formed to be inclined so that the end portion on the side of the suspension hole 154b is slightly lifted.
- the blocking portion 156 is disposed through the side where the suspension hole 154b is not formed.
- the closing part 156 has a closing bar 156a that is arranged so as to be able to appear and retract inside the flange-like part 154a, and a ring-shaped engaging part 156c that can be remotely operated.
- the state where the hook-shaped portion 154a is opened is indicated by a solid line
- the state where it is closed is indicated by a dotted line. Since the hook-shaped portion 154a is slightly tilted, when the lever is lifted, there is little movement of the center of gravity, and it is difficult for shaking to occur.
- a circular area indicated by a two-dot chain line in an area surrounded by the hook-like portion 154a and the blocking portion 156 (indicated by a dotted line) schematically represents a connection portion of the insulators to be worked.
- FIG. 14 is an enlarged view of the wire rod connecting portion 158 of the insulator support 150 of FIG. 12 and its surroundings.
- the wire rod connecting portion 158 is formed in a U shape that can accommodate the intermediate portion of the support bar 152 from the side.
- a suspension hole 158b is also formed in the wire rod connecting portion 158.
- the belt 4 (see FIG. 1) of the pole lifting device 1 can be connected not only to the lever engaging portion 154 but also to the wire rod connecting portion 158.
- the fastening portion provided to close the U-shaped opening is tightened, the wire rod connecting portion 158 can be fixed at an arbitrary height position. Therefore, it is possible to easily change the lifting position according to the work content.
- the draining portion 160 that divides the flow of raindrops is provided above and below the filament material connecting portion 158, but at least when the draining portion 160 is provided on the lower side of the filament material connecting portion 158, The flow of raindrops transmitted from the belt 4 of the column lifting device 1 to the wire rod connecting portion 158 can be separated as well as the lever engaging portion 154.
- FIG. 15 is a diagram showing a usage state of the insulator support 150 of FIG.
- FIG. 15 shows a state in which the insulator support 150 is connected to the column lifting device 1.
- the electric wire in FIG. 15 shows only the middle line among the three wires transmitted by the three-phase AC, and the remaining two external lines connected to the arm bracket 303 are not shown for convenience of explanation. Yes.
- the middle line is wired at a position higher than the arm metal 303, that is, at a height different from the outer line, the working range in the height direction is expanded. Accordingly, a sufficient range of motion can be secured in the vertical direction for the work object in the vicinity of the arm metal 303, while the work area above the arm metal 303 is only movable on the upper side with the column lifting device 1 alone. Can't get enough.
- An insulator support 150 is used to compensate for this upper range of motion.
- the belt connector 6 provided at the lower end of the belt 4 for connecting the belt 4 of the column lifting device 1 to another tool is engaged with the wire rod connecting portion 158 of the insulator support 150.
- the belt connector 6 may be lifted exceeding the upper limit by the height difference H from the linear member connecting portion 158 to the lever engaging portion 154 of the lever support 150. It becomes possible.
- FIG. 16 is a perspective view of a counter pole fixture 180 according to the present invention.
- a branch path (described later with reference to FIG. 20) in parallel with the insulator and switch the tension to the branch path side. is there.
- a counter-fixing tool 180 is used as a scaffold for forming such a branch path between the electric wire and the utility pole.
- the counter pole fixture 180 has a curved portion 182 that can be elastically deformed.
- the curved portion 182 is formed so that the inner diameter is approximately the same as the outer diameter of the utility pole. Moreover, it is formed in the circular arc shape of the length exceeding the half circumference of the circumference of a utility pole. Since it is constituted in this way, it can be easily attached to the side of the utility pole with elastic deformation by pushing lightly.
- Guide pieces 182a are formed on both sides of the curved portion 182 so as to open outward. Therefore, when the electric pole is pushed in from the side, the electric pole is guided toward the center of the bending portion 182, so that it can be easily mounted even by remote operation.
- a string-like body 184 is arranged along the inside of the curved portion 182.
- the string-like body 184 is fixed to the bending portion 182 by four fixing bands 186. Further, the string-like body 184 is formed with an annular processed portion 190 at both ends. Among these, one end is disposed at a position close to one end of the bending portion 182, and the other is provided at a position away from the bending portion 182.
- the ring-shaped processed portion 190 of the string-like body 184 provided at a position close to the curved portion 182 is a string hooking portion 184a through which an extended portion 184b extended to the other is passed.
- the use state of the strap portion 184a will be described with reference to FIG.
- a gripping portion 188 is provided on the guide piece 182a of the curved portion 182 on the side where the strap portion 184a is formed.
- the grip portion 188 is formed with a recess portion 188a that can be easily gripped by a Yatsuko or the like that is used as a remote operation tip tool.
- FIG. 17 is a diagram showing a usage state of the counter pole fixture 180 of FIG.
- the gripping tool 304 such as a power pole to be fixed or a remote control yakko is represented by a dotted line.
- FIG. 17 shows a state where the counter pole fixing tool 180 is attached to the power pole.
- the string-like body 184 is tightened by passing through the extension part 184b at the other end through the string-hanging part 184a at one end of the string-like body 184, and is fixed to the utility pole.
- the gripper 188 can change the angle around the direction of the axis X indicated by the alternate long and short dash line. Thereby, it is possible to adjust the holding angle with respect to the bending part 182 according to a working environment.
- the gripping portion 188 whose angle has been adjusted in this way can be gripped by the gripping tool 304 or the like, and mounted so that the bending portion 182 is hooked from the side of the utility pole.
- the inner diameter of the counter pole fixture 180 including the string-like body 184 disposed along the curved portion 182 is formed to be slightly smaller than the outer diameter of the utility pole, the string-like body 184 is formed. Even if it is not tightened, it is stabilized only by the elastic restoring force of the bending portion 182. Further, when a member having a large friction coefficient is used for the fixed band 186 that fixes the string-like body 184 to the curved portion 182, the stability is further improved.
- FIG. 18 shows a perspective view of a hanging tool 210 according to the present invention.
- the hanging tool 210 includes one extending rod 212 and two suspension parts 216.
- the two suspension parts 216 have two engagement bodies 217 and 218, respectively. These two engaging bodies 217 and 218 are respectively arranged along virtual planes P1 and P2 that are spaced apart in parallel.
- the virtual planes P1 and P2 are represented by two-dot chain lines.
- the two engaging bodies 217 and 218 are integrally configured so as to oppose each other of the electric wire housing sides formed in a concave shape.
- the hanging tool 210 is configured so that the electric wire can be accommodated from above between the two engaging bodies 217 and 218 spaced apart in parallel.
- the suspension 216 is pivotally supported with respect to the base 214 fixed to the extending rod 212 so as to be rotatable between the two engagement bodies 217 and 218.
- FIG. 19 is a perspective view showing the operation of the suspension part 216.
- FIG. 19A shows a state in which a virtual plane including the above-described engagement body is arranged in parallel with the extending rod 212
- FIG. 19B shows that the virtual planes P1 and P2 are perpendicular to the extending rod 212. It shows the state of being placed.
- the virtual planes P1 and P2 are represented by two-dot chain lines as in FIG.
- a ring-shaped engagement portion 222 that can be remotely operated is provided at the lower end of the rotating shaft of the suspension portion 216.
- the direction of the suspension part 216 can be changed by rotating the engaging part 222 using a remote control rod or the like.
- FIG. 18 shows the state of FIG. 19 (b).
- the position of the electric wire 301 accommodated is schematically represented by a one-dot chain line.
- the hanging tool 210 accommodates an electric wire between two engaging bodies 217 and 218 from above in the state of FIG. And after accommodating an electric wire, the suspension part 216 is rotated 90 degree
- the two engaging bodies 217 and 218 constituting one suspension portion 216 are not exactly the same shape.
- One tip is formed to protrude downward, and an anti-rotation portion 218a is formed by bending outward.
- the rotation preventing portion 218a is caught by the electric wire simply by grasping the engaging portion 222 and simply rotating the suspension portion 216. It is not possible to return to the state of a).
- the hanging suspension 210 can be prevented from dropping from the electric wire by an erroneous operation by the locking action of the rotation preventing portion 218a.
- the protrusions for preventing the dropout such as the rotation preventing portion 218a may be provided on both sides of the engaging bodies 217 and 218.
- the extending rod 212 a member having a length corresponding to the branch path including the tension device 270 is selected.
- One end of the extension rod 212 is provided with a connecting portion 220 to which a wire drawing device 270 including a gripper 270a is connected in series.
- the other end of the extending rod 212 is provided with a connecting portion 221 that is connected to the string-like body 184 (see FIG. 16) of the counter pole fixture 180.
- the configuration according to the present embodiment includes a hook-shaped connecting portion 221 that can hook the annular processed portion 190 of the above-described string-like body 184 (see FIG. 19).
- FIG. 20 is a diagram illustrating a usage state of the counter pole fixing tool 180 and the hanging tool 210.
- the branch path is schematically represented by a one-dot chain line.
- the illustration of the peripheral configurations not described, other than the external line, is omitted from the three lines transmitted by the three-phase alternating current.
- FIG. 20 shows a state in which a hanging tool 210 is suspended from an electric wire near the insulator and a counter pole fixing tool 180 is temporarily fixed to the power pole.
- the tension device 270 is connected to the connecting portion 220 at one end of the extending rod 212 of the suspended hanging tool 210, and the counter column fixing tool 180 is connected to the connecting portion 221 at the other end. .
- FIG. 21 is a six-side view and a perspective view of the jumper wire holder 240.
- 21 (a) is a front view, (b) is a rear view, (c) is a plan view, (d) is a bottom view, (e) is a right side view, (f) is a left side view, and (g) is a left side view.
- the jumper wire holder 240 includes a mounting bracket 244 on one end side of the insulating rod 242 and a wire locking member 246 on the other end side.
- the mounting bracket 244 is configured to hold the horizontal portion of the angle metal brace 303. If the arm metal 303 is a square pipe material, the mounting bracket 244 can be replaced with a clamp that can hold the square pipe material.
- the structure of the mounting bracket 244 will be described using a cross-sectional view. 22A is a plan view of the jumper wire holder 240, and FIG. 22B is a longitudinal sectional view taken along the line FF of FIG. 22A.
- FIG. 22B the cross section of the arm metal 303 of the angle member to be attached is represented by a dotted line.
- the mounting bracket 244 is attached by bolt fastening so as to sandwich the horizontal portion of the angle member.
- the wire locking tool 246 has a shape similar to the suspension part 216 of the hanging tool 210. That is, a structure in which two curved engagement bodies 246a are arranged so as to face each other's electric wire accommodation side along two virtual planes spaced in parallel is integrally configured.
- the structure of the electric wire locking device 246 of the jumper wire holder 240 is similar to the suspension portion 216 of the hanging device 210, but is not rotatably provided, and the virtual plane is arranged parallel to the insulating rod 242. It is different in that it is fixed by.
- the rotation prevention part 218a like the hanging tool 210 is not formed in any of the engaging bodies 246a constituting the wire locking tool 246.
- the jumper wire holder 240 having such a configuration can be safely operated by fixing the jumper wire holder 240 to the arm metal 303 and hooking the jumper wire during the insulator replacement operation on the wire locking device 246. Further, the wire locking device 246 can be brought into a locked state by simply inserting a jumper wire between the two engaging bodies 246a and rotating the direction of the inserted jumper wire by 90 degrees without using a clamping mechanism. It is. Therefore, the work efficiency can be improved.
- Step of switching tension to the branch path side including the tension device This process forms a branch path including the tension device between the electric wire and the utility pole in parallel with the insulator to be worked. This is a step of relieving or eliminating the tension of the path on the insulator side by contracting the branched path side with a tension device to generate tension. Specifically, this step includes the following steps (a) to (e).
- (A) Step of gripping one end of the tension device by the electric wire In this step, as shown in FIG. 20, the path connecting the electric pole 302 and the electric wire 301 across the insulator 300 to be replaced, which needs to be replaced.
- a tension device 270 is attached to the path indicated by the one-dot chain line.
- the wire drawing device 270 includes the wire gripper 270a and the wire drawing device 270b. By grasping the electric wire 301 with the grasping device 270a, one end of the tensioning device 270 is fixed.
- FIG. 20 A process of suspending a hanging tool for suspending the other end of the tensioning device on the electric wire
- a hanging tool 210 is installed between the gripping position by the gripper 270a and the insulator 300.
- the hanging tool 210 is suspended from the upper two suspension parts 216 so as to accommodate the electric wire 301 from above.
- step (C) The step of connecting the other end of the tension device to the hanging device
- the step (b) above is performed so as to form a branch path in parallel with the path on which the insulator 300 is disposed.
- the connecting portion 220 at one end of the extending rod 212 of the hanging tool 210 suspended from the electric wire 301 and the wire drawing device 270 are connected in series. In this state, nothing is connected to the connecting portion 221 at the other end of the hanging tool 210, so that tension cannot be generated yet.
- both ends of the wire tensioner 270b are suspended by the gripper 270a and the hanging tool 210, it is stable even if the operator does not hold it with a remote control rod or the like.
- Step of connecting the lifting wire of the pole lifting device to the lever support As shown in FIG. 15, the rod lifting device 1 is connected to the wire connecting portion 158 of the lever support 150.
- the belt 4 is connected. 15 shows a state before the lever 300 is engaged with the lever engaging portion 154, but before the belt 4 is connected to the wire rod connecting portion 158, the lever 300 is connected to the lever support 150. May be supported at the same time or at the same time.
- connection position of the belt 4 with respect to the insulator support 150 is appropriately selected according to the height difference between the insulator 300 and the column lifting device 1. Therefore, when the height of the lever 300 is close to the height of the member to which the pole lifting device 1 is fixed (in this case, the arm 303), the hanging hole 154b of the lever engaging portion 154 is selected.
- the lever 300 located at a position higher than the arm metal 303 on which the pole lifting device 1 is installed is the work target, so that the lever 300 is provided at an intermediate position of the support bar 152.
- the belt 4 is connected to the wire rod connecting portion 158. As described above, by appropriately selecting the connection position, a wide range exceeding the lifting limit height of the column lifting device 1 can be set as a work target.
- connection can be removed by pushing up the lock spring from below.
- the lock spring from below.
- the insulator support 150 is supported, the insulator that has lost its tension is stabilized, so that the work efficiency is improved.
- the closing portion 156 of the lever engaging portion 154 is closed, it is possible to prevent the lever 300 from floating upward, so that the operation is further stabilized.
- the insulator support 150 can be used in place of the gripping tool 304.
- the free end of the electric wire 301 will become unstable.
- the free end of the electric wire 301 is accommodated in the suspension part 216 of the hanging tool 210 at the stage of the step (b) of the above step (1). It can prevent drooping.
- the tensioning device 270 and the counter pole fixture 180 are connected. Work becomes easy. Conversely, after the tension is switched from the insulator 300 side to the branch path side, the electric wire 301 whose tension has disappeared can be stably suspended to the hanging tool 210 side. Therefore, when the new insulator 300 is assembled after separation, the free end of the electric wire 301 can be arranged in the vicinity of the working position, so that the working efficiency is improved and the electric wire 301 is prevented from dropping. It is also possible.
- the broken insulator 300 can be separated safely and easily.
- the above steps may be followed in reverse.
- the horizontal side holding portion 34 constituting the holding portion 32 of the direction changing tool 30 in FIG. 2 is engaged with the contact plate 34a in which the horizontal guide hole 34b is formed using the thumbscrew 37.
- the configuration with the pawl 36 attached is shown as an example. However, as long as the horizontal width of the arm metal 303 such as an angle member can be set in advance, the screw may be moved in the clamping direction as in the case of the vertical clamping unit 40.
- the configuration in which the screw-type clamp is adopted is shown as an example for the vertical-side clamping unit 40 that configures the clamping unit 32 of the direction changing tool 30 in FIG.
- different types of clamps may be used as long as the arm metal such as an angle member can be clamped in the vertical direction by remote operation.
- the example in which the insertion hole 94a formed in the upper contact portion 94 of the direction changer 90 in FIG. 5 is configured by a cylindrical member has been described.
- the insertion portion 108 of the swivel portion 104 to be inserted is configured to be stably rotatable in the vertical direction, it may not be a cylindrical member.
- the configuration in which the pinching portion 92 as the arm bracket attaching portion of the direction changing tool 90 in FIG. 5 uses the eyebolt 100a as the interval fixing tool 100 is shown as an example.
- the fixing structure by screwing the eyebolt 100a or the like is not necessary.
- the suspension hole 154b for connecting with the belt 4 of the pole lifting apparatus 1 is formed in the wire rod connection part 158 provided in the support rod 152 of the insulator support tool 150.
- FIG. The configuration is shown as an example. However, a connection structure other than the suspension hole 154b and the belt connection part 6 may be used as long as the structure is detachable.
- the configuration in which the blocking portion 156 that closes the opening of the lever engaging portion 154 is disposed through the side where the suspension hole 154b is not formed is shown as an example.
- a through hole may be formed on the side where the suspension hole 154b is formed.
- it is the structure which can be obstruct
- the configuration in which the closing portion 156 that closes the opening of the lever engaging portion 154 opens and closes by moving the closing rod 156a that is disposed through in the longitudinal direction is shown as an example. However, it may be configured to open and close by a rotation operation around an axis extending in a direction orthogonal to the longitudinal direction.
- the configuration in which the string hooking portion 184a through which the string-like body 184 is passed is formed in the counter pole fixing tool 180 as an example.
- the extended portion 184b side may have a hook shape.
- the configuration in which the string hooking portion 184a through which the string-like body 184 is passed is provided on the same side as the gripping portion 188 in the counter pole fixing member 180 is shown as an example. However, if one is extended from one end of the bending portion 182 and the other is installed in the vicinity of the other end of the bending portion 182, the string hooking portion 184 a may be provided on the opposite side of the grip portion 188. I do not care.
- the configuration in which the string-like body 184 is disposed along the inner wall surface of the curved portion 182 in the counter pole fixing tool 180 is illustrated as an example. It is also possible to have a configuration in which
- the configuration in which one string-like body 184 is arranged along the curved portion 182 in the counter column fixing tool 180 is shown as an example.
- the string hooking portion 184a may be connected to one end of the bending portion 182 and the string-like extending portion 184b may be connected to the other end.
- it can be temporarily fixed by being attached to the utility pole 302 by the elastic force of the bending portion 182, and after the extended portion 184 b is passed through the string hook portion 184 a, It is possible to fix the book automatically.
- the movable range in the height direction of the column lifting device can be expanded. Therefore, it is particularly useful for insulator replacement when the heights of the three transmission lines of three-phase alternating current are different.
Landscapes
- Electric Cable Installation (AREA)
- Clamps And Clips (AREA)
Abstract
Description
図1は、柱上吊上げ装置1の全体斜視図を示している。柱上吊上げ装置1は、作業対象である耐張碍子300(図15で後述する)を引っ掛ける碍子係合部8、この碍子係合部8を操作する操作棒2、及び、柱上吊上げ装置1自身を電柱の腕金303に旋回可能に固定する方向変換具30を備えている。操作棒2はFRP材で中空成形されており、後に詳しく説明する方向変換具30によって中間位置を掴持されている。腕金303には、アングル材、角パイプ材などが用いられるが、ここではアングル材による腕金303を例として説明する。このような柱上吊上げ装置1は、耐張碍子300の交換工事などにおいて、交換される耐張碍子300だけでなく、その他の工具や装備類を吊り上げるためにも用いられる。
次に、図1の説明で述べた方向変換具30について説明する。
図3は、図2の方向変換具30と置き換え可能であって、旋回部が脱着可能に構成された仰俯角変更可能な方向変換具60を示している。図3(a)は正面図、(b)は背面図、(c)は平面図、(d)は底面図、(e)は右側面図、(f)は左側面図を示している。腕金303に取り付ける挟持部62と、挟持部62に対して相対的に水平旋回可能な旋回部70とから構成されているところは、図2の方向変換具30と同様である。また、図4(a)は方向変換具60の左側面図、図4(b)は図4(a)の左側面図に示したA-A線で切断した中央縦断面図である。これら図3、4を用いて方向変換具60の説明を行う。
図5は、図2の方向変換具30又は図3の方向変換具60との置き換えが可能な方向変換具90を示している。方向変換具90では、旋回部104が脱着可能に構成され、仰俯角が固定されている。図5(a)は正面図、(b)は背面図、(c)は平面図、(d)は底面図、(e)は右側面図、(f)は左側面図を示している。また、図6(a)は、方向変換具90の左側面図、図6(b)は図6(a)の左側面図に示したB-B線で切断した中央縦断面図である。図7は方向変換具90の全体斜視図である。図8は方向変換具90の可動箇所の動作を示した全体斜視図である。また、図9は方向変換具90の分解図を示している。これら図5~9を用いて説明する。
次に、アングル材用の腕金取付具について説明する。図10は、アングル材用取付具120を示している。図10(a)は正面図、(b)は背面図、(c)は平面図、(d)は底面図、(e)は右側面図、(f)は左側面図、(g)は斜視図である。
図12は本発明に係る碍子支持具150の斜視図である。
図16は、本発明に係る対電柱固定具180の斜視図である。
図18は、本発明に係る掛吊具210の斜視図を示している。
次に、碍子交換作業におけるジャンパー線301a(図20参照)の保持に用いられるジャンパー線保持具240について説明する。図21は、ジャンパー線保持具240の6面図及び斜視図である。図21(a)は正面図、(b)は背面図、(c)は平面図、(d)は底面図、(e)は右側面図、(f)は左側面図、(g)は斜視図を示している。ジャンパー線保持具240は、絶縁棒242の一端側に取付金具244を備えると共に、他端側に電線係止具246を備えている。
ここからは、碍子交換作業において、破損した碍子を撤去するまでの碍子分離工法について工程ごとに項目を挙げて説明する。
この工程は、作業対象となる碍子に対して並列に、張線装置を含む分岐路を電線と電柱との間に形成し、この形成された分岐路側を張線装置により収縮させて張力を発生させることにより、碍子側の経路の張力を緩和又は消失させる工程である。具体的には、この工程は以下の(a)~(e)の工程を含んでいる。
この工程では、図20に示すように、交換の必要が生じた作業対象の碍子300を跨いで、電柱302と電線301とを繋ぐ経路(一点鎖線で示した経路)に張線装置270が取り付けられる。張線装置270は、上述したように掴線器270aと張線器270bとを含んでいる。この掴線器270aで電線301を掴持させることによって張線装置270の一端が固定される。
この工程では、図20に示したように、掴線器270aによる掴線位置と碍子300との間に、掛吊具210が設置される。この掛吊具210は、上述の2つの懸架部216に上方から電線301を収容するようにして吊設される。
この工程では、碍子300が配置されている経路に対して並列に分岐路を形成するように、上の(b)の工程により電線301に吊設された掛吊具210の延設棒212の一端の連結部220と張線装置270が直列に連結される。この状態では掛吊具210の他端の連結部221には何も連結されていないので、まだ、張力を発生させることはできない。しかし、張線器270bの両端は、掴線器270aと掛吊具210によって吊り下げられているので、作業者が遠隔操作棒等で保持しなくても安定している。
この工程では、掛吊具210の延設棒212の連結部221に対して、予め電柱302に装着しておいた対電柱固定具180の紐状体184が連結される。これにより、分岐路は、碍子300の配置されている経路に対して並列接続になる。この場合も、張線装置270を接続する場合と同様に、安定した掛吊具210に対して対電柱固定具180を連結することができるので、安全且つ容易に作業を行える。
この工程では、上記(d)までの工程で電線301と電柱302との間に分岐路が形成された状態で、張線装置270の張線器270bに収縮動作をさせる。これにより、徐々に、碍子300側の張力が失われ、分岐路側へ張力が切り換わる。
この工程では、上述の(1)の(e)の工程に続いて、碍子300の連結箇所に碍子支持具150の碍子係合部154が係合される(図13、図15参照)。これにより、張力の失われた碍子300が安定した状態で支持される。
この工程では、図15に示すように、碍子支持具150の線条材連結部158に柱上吊上げ装置1のベルト4が繋がれる。なお、図15には碍子係合部154に碍子300が係合される前の状態が示されているが、ベルト4を線条材連結部158に連結する前に碍子300を碍子支持具150で支持しても良く、また、同時でも構わない。
この工程では、柱上吊上げ装置1のベルト4に接続されて安定した碍子支持具150を支えながら、連結を解除する工具(図示せず)を用いて碍子300の連結が解除される。
この工程では、作業員が支える碍子支持具150を介して、柱上吊上げ装置1で碍子300が持ち上げられて分離される。荷重は柱上吊上げ装置1が担うので、作業員の負担は軽減される。
2 操作棒
4 ベルト
6 ベルト連結具
8 碍子係合部
10 巻取り装置
12 ハンドル
12a アイボルト
30 方向変換具
32 挟持部(腕金取付部)
34 水平側挟持部
34a 当接板
34b 水平ガイド孔
36 係止爪
37 蝶ネジ
38 ガイドピン
40 鉛直側挟持部
42 ガイド板
42a 鉛直ガイド孔
44 昇降爪部
46 ネジ軸
48 ナット
50 旋回部
52 操作棒固定部
54 仰俯角調節部
54a 突き上げボルト
54b 連結長孔
54c 連結ピン
60 方向変換具
62 挟持部(腕金取付部)
64 上方当接部
64a 挿入孔
64b スライド部
66 下方当接部
66a アングル材保持部
66b 角パイプ材保持部
70 旋回部
72 操作棒固定部
74 挿入部
90 方向変換具
92 挟持部(腕金取付部)
94 上方当接部
94a 挿入孔
96 垂設部
98 対向部
98a ガイド壁
100 間隔固定具
100a アイボルト
102 昇降部
102a アイボルト
102b 当接板
102c 端縁保持部
102d ネジ頭部
104 旋回部
106 操作棒固定部
108 挿入部
108a 係合溝
110 固定ピン
112 把持片
120 アングル材用取付具
122 挿入板
124 支軸(挿入孔)
124a 位置決め孔
126 上側クランプ
126a 固定ボルト
126b アーム
126c 固定ピン
126d 係合部
128 下側クランプ
128a 固定ボルト
128b アーム
128c 固定ピン
128d 係合部
150 碍子支持具
152 支持棒
152a 把持部
154 碍子係合部
154a 鉤状部
154b 吊り孔
156 閉塞部
156a 閉塞棒
156c 係合部
158 線条材連結部
160 水切り部
180 対電柱固定具
182 湾曲部
182a ガイド片
184 紐状体
184a 紐掛け部
184b 延設部
186 固定バンド
188 把持部
188a 凹部
190 環状加工部
210 掛吊具
212 延設棒
214 基部
216 懸架部
218 係合体
218a 回転防止部
220、221 連結部
222 係合部
240 ジャンパー線保持具
242 絶縁棒
244 取付金具
246 電線係止具
246a 係合体
300 碍子(耐張碍子)
301 電線(架空電線)
302 電柱
303、303a 腕金
304 把持工具
310 張力緩和装置
311 張力支持杆
312 張力操作部材
313 吊具
314 腕金
315 引留クランプ
316 高圧線
317 耐張碍子
X 軸
H 高低差
P1、P2 仮想平面
Claims (11)
- 張線装置及び柱上吊上げ装置を用いて耐張用の碍子を架空電線から分離する碍子分離工法であって、
前記碍子と並列に形成された前記張線装置を含む分岐路へ張力を切り換える工程と、
前記碍子を碍子支持具で下方から支持する工程と、
前記碍子支持具に前記柱上吊上げ装置の吊上げ用の線条材を繋ぐ工程と、
前記碍子支持具で支持しながら前記柱上吊上げ装置で吊上げた前記碍子の連結を解除する工程と
を含むことを特徴とする碍子分離工法。 - 前記分岐路へ張力を切り換える工程は、
前記架空電線を前記張線装置の一端で掴持させる工程と、
前記架空電線に前記張線装置の他端を吊り下げる掛吊具を吊設する工程と、
前記掛吊具に前記張線装置の他端を接続する工程と、
前記掛吊具を、電柱に固定された対電柱固定具に固定する工程と、
前記張線装置の一端及び他端の間隔を収縮させる工程と
を含むことを特徴とする請求項1に記載の碍子分離工法。 - 請求項1又は2に記載の碍子分離工法で用いられる柱上吊上げ装置であって、
碍子と係合可能な碍子係合部と、
前記碍子係合部を先端から垂下させ、垂下させた前記碍子係合部を間接的に操作する操作棒と、
前記操作棒を方向変換可能に電柱の腕金に取り付ける方向変換具と
を備えたことを特徴とする柱上吊上げ装置。 - 前記方向変換具は、
鉛直方向に挿入孔が形成されており、前記腕金に取付可能な腕金取付部と、
前記腕金取付部の前記挿入孔へ旋回可能に挿入される挿入部を有すると共に、前記操作棒を固定する操作棒固定部を有する旋回部と
を備えたことを特徴とする請求項3に記載の柱上吊上げ装置。 - 前記腕金取付部は、
前記腕金の上方に当接する上方当接部と、
前記上方当接部の近傍から下方へ垂設された垂設部と、
前記垂設部から前記上方当接部に対向する位置まで延設された対向部と、
前記上方当接部と前記対向部との間隔を固定可能な間隔固定具と、
前記上方当接部へ向けて昇降可能な配置で前記対向部に設けられた昇降部と
を備えたことを特徴とする請求項4に記載の柱上吊上げ装置。 - 前記昇降部の前記垂設部側には、一面を鉛直下方に向けて配置する山形鋼により構成された前記腕金の下端縁を差し込むことが可能な端縁保持部が形成されていることを特徴とする請求項5に記載の柱上吊上げ装置。
- 請求項1又は2に記載の碍子分離工法において、碍子を吊り上げる柱上吊上げ装置と組み合わせて用いられる碍子支持具であって、
一端に把持部を有する支持棒と、
前記支持棒の他端に設けられ、前記碍子の連結部分と係合可能な碍子係合部と、
前記碍子係合部及び前記把持部の間に設けられ、前記線条材と連結可能な線条材連結部とを備えたことを特徴とする碍子支持具。 - 前記線条材連結部は、前記碍子係合部及び前記把持部の間で位置変更可能であることを特徴とする請求項7に記載の碍子支持具。
- 請求項2に記載の碍子分離工法で用いられる、架空電線を張線する張線装置を電柱に固定するための対電柱固定具であって、
前記電柱の外径と同程度の内径を有し、且つ、前記電柱の周長の半周を超える長さの弾性材で円弧状に形成された湾曲部と、
前記湾曲部の一端から延設された紐状体と、
前記湾曲部の他端に設けられ、前記紐状体を掛け通す紐掛け部と
を備えたことを特徴とする対電柱固定具。 - 前記紐状体と前記紐掛け部とは、前記湾曲部に沿った単一部材で構成されていることを特徴とする請求項9に記載の対電柱固定具。
- 請求項2に記載の碍子分離工法で用いられる、一端を架設電線に掴持させた張線装置の他端を前記架設電線に吊り下げる掛吊具であって、
両端に連結構造を有した絶縁棒と、
前記絶縁棒に固定された少なくとも1つの基部と、
平行に離間した仮想平面のそれぞれに沿って2つの係合体が互いの電線収容側を対向させるようにして一体に構成されており、前記基部に対して、前記2つの係合体の間を中心に回転可能に軸支された懸架部と
を備えたことを特徴とする掛吊具。
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CN111555177A (zh) * | 2020-04-14 | 2020-08-18 | 国网黑龙江省电力有限公司鹤岗供电公司 | 管型母线支柱绝缘子更换工具 |
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