JP4711868B2 - Simple ladder for ascending pillar - Google Patents

Description

  The present invention relates to a simple ladder for ascending pillars used for restoration work for power supply in the event of disasters such as earthquakes, storms and floods.

  Conventionally, in order to climb an electric pole from the ground during an electric telephone work, etc., a grid-like ladder is erected on the electric pole so that it reaches the scaffolding bolt at the lower end of the electric pole. Climbing to the scaffold bolt (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-6330 (pages 2 and 3, FIG. 1)

  However, among the scaffold bolts planted in the utility pole, the scaffold bolt at the lower end is usually at a height of about 2 m from the ground and needs to reach it, so the ladder has a total length of 2 to 2. It is about 2.5m long and relatively large. Moreover, the ladder is made of metal and is heavy. On the other hand, if a power outage occurs in the event of a disaster such as an earthquake or storm and flood, and the power supply to consumers such as homes is stopped, it will head to the destination for restoration work on the pillar. In most cases, roads are blocked by the collapse of houses, flooding, etc., and there are only means such as walking or cycling. In such a case, it is not only easy for an operator to carry the large and heavy ladder on his / her shoulder or on the bicycle carrier platform, which is not easy and is dangerous. .

  Further, since the ladder is large, a large amount of space is required for storing and storing the ladder, and there is a problem that handling is troublesome.

  Therefore, the present invention has been made to solve the above-mentioned problems, and can be stored in a bag in a compact, easy to carry without requiring labor, and can be safely handled. The object is to provide a simple ladder for ascending pillars.

  In order to achieve such an object, a simple ladder for a rising pole according to the present invention is a flexible fastening string-like body that is hooked on a scaffold bolt planted on a power pole and wound around the outer peripheral surface of the power pole. And a plurality of footrest members that are detachably attached to the fastening cord-like body and on which the feet are placed when climbing the power pole.

  Specifically, in the simple ladder for rising columns according to the present invention, the fastening string-like body is a rope having a predetermined length, and the footrest member is a board portion disposed on an outer peripheral surface of the electric pole. The cover plate portion is pivotally attached to the substrate portion so as to be freely opened and closed. A structure provided with means for preventing slippage is provided. The rope is made of synthetic resin and has a length of approximately 8.5 m, and the footrest member is preferably formed of a hard synthetic resin material.

  Alternatively, the simple ladder for a rising pillar according to the present invention includes, for example, a plurality of the fastening string-like bodies fixed to each other so as to be separated from each other by a predetermined length along the longitudinal direction of the vertical band and the longitudinal band. Each of the horizontal bands is provided with a connecting means that is detachably engaged when wound on the outer peripheral surface of the utility pole, and each of the leg members is inserted through each of the horizontal bands. The structure which opened the hole is taken. It is preferable that the vertical band and the horizontal band are both flexible and molded from a strong soft synthetic resin material, and the foot member is molded from a hard synthetic resin material. In addition, the vertical band usually has a length of about 1.5 to 2 m, and the horizontal band is about 1.3 to 1.5 m, preferably three to four. Further, if the footrest member is provided to be movable with respect to the lateral band, the usability is improved.

  The simple ladder for a rising column according to the present invention is such that the tightening string-like body is bendable and the footrest member is detachably attached to the tightening string-like body. The footrest members are compactly packed and can be stored in, for example, a bag. Carrying is easy without carrying out labor, and is highly safe and convenient for disaster recovery work. In particular, if the fastening string is formed from a synthetic resin material that is resistant to pulling, and the footrest member is formed from a hard synthetic resin material, the overall weight can be reduced and it can be carried and carried by hand. It is easier to carry.

  In addition, the simple ladder for rising pillars according to the present invention is compact and can be stored in a bag, so it is convenient without taking up space for storage.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a simple ladder for climbing pillars according to the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a simple ladder for rising columns (hereinafter simply referred to as “first simple ladder”) according to the first embodiment. The first simple ladder A1 is used as a flexible fastening string-like body that is hooked on a scaffold bolt B at a lower end portion implanted in a power pole D to be described later and is wound around the outer peripheral surface of the power pole D. It comprises a rope 1 and four footrest members 2 that are detachably attached to the tightening string 1 and on which a foot is placed when climbing the electric pole D. In the figure, 3 is a rope winder for winding the rope 1 so as to be convenient for use and storage, and G stores the rope 1, the four leg members 2 and the rope winder 3. It is a bag to do. In addition, the fastening string-like body in the present invention means the one including the rope 1, the vertical band 30 and the horizontal band 31 described later.

  The rope 1 has, for example, a double structure in which a core formed by twisting an aramid fiber yarn is covered with a polyester resin, and has a length of 8.5 m. A pulling fastener 5 having a ratchet mechanism is attached to one end of the rope 1. Although the detailed description is omitted, the pulling fastener 5 is configured to insert the one end 1a of the rope 1 and pull out the one end 1a to be folded. By pulling the one end 1a, the rope 1 sequentially advances in that direction. On the contrary, even if the rope 1 is returned, the rope 1 does not move from that position unless the ratchet mechanism is released. In addition, a hook 6 is attached to the tip of the pulling fastener 5.

  Each of the footrest members 2 is formed of, for example, a PC alloy or an AES resin, and a lightweight and hard material is selected. The footrest member 2 includes a substrate portion 7a disposed on the outer peripheral surface of the utility pole D, and a cover plate portion 7b that is pivotally attached to the substrate portion 7a at the upper end portion and can be freely opened and closed. As shown in FIGS. 2 to 5, each of the substrate portion 7a and the cover plate portion 7b has a U-shaped flat cross section and is formed in a vertically long shape, and the substrate portion is formed with the vertical direction along the vertical direction of the utility pole D. The open side of 7a is brought into contact with the outer peripheral surface of the utility pole D.

  Further, an anti-slipping means for sandwiching the rope 1 is provided between the outer surface of the substrate portion 7a and the inner surface of the cover plate portion 7b so that the respective footrest members 2 do not deviate from the rope 1. It is done. That is, rope grooves 9 and 9 are provided on the outer side surface of the substrate portion 7a as left-right symmetric displacement prevention means with the upper end opened at both side edges and the lower end opened at the lower edge. These rope grooves 9, 9 are formed in a substantially trapezoidal cross section, and the both sides are gradually narrowed toward the bottom so that the rope 1 can be easily bitten. Moreover, each of the rope grooves 9, 9 is bent in a generally U shape, and a slip prevention surface 10 is formed as a sawtooth-shaped displacement prevention means orthogonal to the longitudinal direction on the entire inner surface including the bottom surface. . Further, a plurality of convex portions 11 are provided at appropriate positions on the bottom surfaces of the rope grooves 9 and 9 as anti-slip prevention means. A protrusion 12 is provided at the lower part of the outer surface of the substrate part 7 a, and a locking hole 13 is provided through the protrusion 12.

  On the other hand, on the outer side surface of the cover plate portion 7b, a footrest portion 14 for placing a foot when climbing on the utility pole D projects substantially vertically. Further, a stop portion 15 is integrally provided at the distal end portion of the footrest portion 14 so that the foot does not slip out of the upper surface of the footrest portion 14 and step off. On the inner surface of the cover plate portion 7b, it is positioned so as to face the rope grooves 9 and 9 so as to be fitted into the rope grooves 9 and 9, and the rope 1 inserted therein is prevented from being pushed into the rope groove 9 A pair of pressing pieces 16, 16 as means are provided in a protruding manner. These holding pieces 16, 16 are also formed on the outer peripheral surface with an anti-slip surface 17 as a sawtooth-shaped displacement prevention means perpendicular to the longitudinal direction. Further, when the cover plate portion 7b is overlapped with the substrate portion 7a so as to correspond to the respective convex portions 11 in the both rope grooves 9, 9, the respective convex portions 11 are fitted to the both pressing pieces 16, 16. A recess 18 is provided as a means for preventing slippage. A locking piece 19 having a substantially V-shaped side surface and having elasticity is provided at the lower portion of the cover plate portion 7b, and a claw portion 20 that can be locked to the locking hole 13 is provided on the outer surface of the locking piece 19.

  Anti-slip members 21a and 21b are bonded to a portion where the outer peripheral surface of the utility pole D contacts the substrate portion 7a and an upper surface portion of the footrest portion 14 of the cover plate portion 7b, respectively. The non-slip member 21a at the portion where the outer peripheral surface of the utility pole D contacts the substrate portion 7a is made of a soft synthetic resin material, and the anti-slip member 21b at the footrest portion 14 portion of the cover plate portion 7b is a thin aluminum plate. It is formed by applying an adhesive on the surface and spraying and fixing abrasive grains on the upper surface.

  The rope winder 3 has a substrate 22 installed on the ground, a support plate 23 is erected on one side, and a reel 24 for winding the rope 1 is rotatably mounted on the support plate 23. Yes. A handle 25 is attached to one side of the reel 24 to rotate the reel 24. Further, on one side of the substrate 22, a foot plate 26 for placing a foot and fixing the rope winder 3 on the ground is connected in a foldable manner.

  1st simple ladder A1 concerning the present invention consists of the above-mentioned composition, and explains the usage method next. Usually, the rope 1 is wound around a rope winder 3 and stored in a bag G as a set including the four leg members 2. Then, when heading to the destination on foot or by bicycle during restoration work for power supply in the event of a disaster such as an earthquake or storm and flood damage, carry the bag G in which the rope 1 or the like is stored. Thus, since the first simple ladder A1 is compactly packed and stored in the bag G, it is lightweight, easy to carry, and safe. In particular, since the rope 1 and the footrest member 2 are formed of a synthetic resin material, the overall weight is reduced, and it is easier to carry and carry with hands.

  Therefore, in order to attach the first simple ladder A1 to the utility pole D for restoration work such as electric telephone construction, first, the rope 1 is removed from the rope winder 3 and the utility pole is located at an almost intermediate position as shown in FIG. Hang on the scaffolding bolt B at the bottom of D and turn the two on both sides of the rope 1 to the opposite side of the utility pole D. Next, the footrest member 2 is disposed on the outer peripheral surface of the utility pole D on the opposite side of the scaffolding bolt B and at a position approximately 50 cm below the scaffolding bolt B. The inner surface of the part 7a is brought into contact with the outer peripheral surface. In this state, as shown in FIG. 7, the cover plate portion 7 b is opened, and each rope 1 is fitted in each rope groove 9.

  After the two ropes 1 are fitted into each rope groove 9, the cover plate portion 7b is pressed against the outer surface of the substrate portion 7a as shown in FIGS. As a result, the claw portion 20 of the locking piece 19 is engaged with the locking hole 13, the cover plate portion 7 b is closed, and each pressing piece 16 is fitted in each rope groove 9. In this state, since both side surfaces of the rope grooves 9 and 9 are gradually narrowed toward the bottom surface, the ropes 1 are pushed into the bottom surface side of the rope grooves 9 as shown in FIG. The rope groove 9 is pressed from both side surfaces and is strongly sandwiched between the slip prevention surface 10 on the inner surface of each rope groove 9 and the slip prevention surface 17 on the outer peripheral surface of each stopper piece 16. In addition, each rope 1 is bent three-dimensionally by the bent portion of each rope groove 9 itself and the convex portion 11 and the concave portion 18 fitted into the convex portion 11. At this time, the upper surface of each footrest part 14 is positioned substantially horizontally.

  Similarly, the two ropes 1 below the footrest member 2 are turned back to the scaffold bolt B side. And the next leg member 2 is arrange | positioned and fixed to the outer peripheral surface of the utility pole D, and the position 50 cm lower than this leg member 2. FIG. Thereafter, similarly, the two footrest members 2 and 2 are arranged and fixed so as to be alternately positioned on the outer peripheral surface of the utility pole D. The two ropes 1 descending from the footrest member 2 located at the lowermost end are also turned to the opposite side. Finally, as shown in FIG. 9, an annular portion 27 is formed at one end of the rope 1 to which the fastener 5 is not attached, and the hook 6 of the other end of the retainer 5 is hooked on the annular portion 27. The rope 1 is firmly stretched by pulling the free end portion of the rope 1 pulled out from the pulling fastener 5. Thereby, as shown in FIG. 12, attachment of 1st simple ladder A1 is completed.

  Therefore, the worker puts his or her foot on each footrest member 2 from the bottom and climbs to the scaffolding bolt B at the lower end, and further climbs to the scaffolding bolt B to perform the restoration work. At this time, by putting the foot on each footrest member 2, each holding piece 16 is deeply fitted into each rope groove 9, and each slip prevention surface 10, 17 firmly bites into the outer peripheral surface of each rope 1, Thus, the shift of the footrest member 2 with respect to 1 can be reliably prevented. When the work is finished, the rope 1 is removed and each leg member 2 is removed. Further, in order to wind the rope 1 around the rope winder 3, as shown in FIG. 13, the base plate 22 is placed on the ground together with the foot plate 26 in a state where the foot plate 26 is spread, and the foot plate 26 is moved with the foot. The rope winder 3 is fixed to the ground by stepping from above. Then, the rope 25 is wound up by holding the handle 25 and rotating the reel 24. The rope 1 wound up in this way and each of the footrest members 2 are again stored in the bag G and carried.

  The rope winder 3a shown in FIG. 14 relates to another embodiment. In addition, since the rope winder 3a according to the other embodiment has a part in common with the rope winder 3 used in the first simple ladder A1, the same parts are assigned the same numbers. Detailed description is omitted.

  That is, in the rope winder 3a according to another embodiment, a reel 24 that winds the rope 1 is rotatably attached to an outer surface of a vertical rectangular support plate 23. A handle 25 is attached to one side of the reel 24. In addition, holding pieces 50 and 50 that are obliquely bent to the opposite side of the reel 24 with respect to the support plate 23 are integrally provided on both side edges of the support plate 23, and a fixing band 52 is inserted into each holding piece 50. The vertically long hole 51 is opened. The fixing band 52 fixes the rope winder 3a to the outer peripheral surface of the utility pole D by being wound around the utility pole D, and serves as a connecting means for fastening the other end through one end. A fastener 53 is provided.

  A rotation plate 55 is connected to the upper end edge of the support plate 23 via a hinge portion 54, and the rotation plate 55 is freely bent with respect to the support plate 23. A pair of ratchets 56 and 56 and a rope hooking ring 57 are disposed on both sides of one side surface (outer surface) via a seat plate 60. The pair of ratchets 56, 56 are pivoted 58 so as to rotate along the surface of the seat plate 60, that is, the rotation plate 55, and are urged so as to rotate in opposite directions. In addition, the dimension from the shaft-attached portion 58 to the tip of both ratchets 56 and 56 is set to be longer than one half of the dimension between the shaft-attached portions 58 and 58 of both ratchets 56 and 56. As a result, both latitudettes 56 and 56 are stopped while the tip portions are in contact with each other in a normal state.

  Sawtooth-shaped engagement portions 59 and 59 are provided on the contact surfaces of the respective latitudettes 56. The rope 1 sandwiched therebetween moves in one direction, but cannot move in the opposite direction due to the length relationship of the ratchet 56 and the meshing portions 59 and 59 being engaged with each other. It has become. Thereby, the rope 1 is strongly wound around the outer peripheral surface of the utility pole D. Rope hanging rings 57a and 57b positioned in the vicinity of the pair of latitudettes 56 and 56 on both sides have a substantially semicircular shape, and both end portions thereof are fixed to the seat plate 60 and a cutting portion 65 is formed in the central portion. ing. Therefore, the rope 1 can be hooked or removed from the rope hooking rings 57a and 57b from the cutting portion 65.

  A hook ring 61 that slides freely along the rope 1 is attached to the rope 1. The hook ring 61 is provided with a ring-shaped portion 62 at the tip, and a part of the ring-shaped portion 62 is cut off. A sealing rod 63 that pivots freely on the excision part and is always biased so as to close the excision part is pivotally attached. This is because, when the rope 1 is wound around the reel 24 after the work is finished, the hook ring 61 is wound around the flange 24a at the side end of the reel 24 in a state where the rope 1 is wound so that the rope 1 does not unravel. It is for latching in the several through-hole 64 opened in the.

  Next, the usage method of the rope winder 3a which concerns on other embodiment is demonstrated. In this rope winder 3a, one rope 1 is folded in two and both ends are wound around the reel 24 for use.

  Therefore, first, as shown in FIG. 15, the rope winder 3a is arranged on the opposite side of the scaffolding bolt B and at the lower end of the utility pole D, and the fixed band 52 is wound around the outer peripheral surface of the utility pole D, and one end thereof The rope winder 3a is fixed to the outer peripheral surface of the utility pole D by inserting the bolt into the fastener 53 and tightening it. Then, the rope 1 folded in half from the reel 24 of the rope winder 3a is pulled out by a predetermined length, and the folded portion is hung on the scaffold bolt B. At this time, the rope 1 drawn out from the reel 24 is inserted into the one rope hooking ring 57a through the cutting portion 65, and the rope 1 is rotated around the outer periphery of the utility pole D from the same side. Hang on. It is preferable that the rope 1 is sufficiently pulled out so as to have a margin.

  After that, as shown in FIG. 16, like the first simple ladder A1, the four footrest members 2 are arranged at predetermined positions on the outer peripheral surface of the utility pole D, and the ropes 1 on both sides are attached to the footrests. The member 2 is fitted into the rope groove 9 of the member 2 in a stretched state. After fitting the two ropes 1 into each rope groove 9, the cover plate portion 7b is pressed against the outer surface of the substrate portion 7a. In this way, the respective footrest members 2 are arranged and fixed so as to be lowered by 50 cm each on the outer peripheral surface of the utility pole D and positioned alternately on the left and right.

  As shown in FIG. 17, of the two ropes 1 that descend from the footrest member 2 positioned at the lowermost end, one rope 101 inserted into one rope hooking ring 57a has a pair of ratchets 56, 56 on the same side. Intervene in between and hang. The other rope 102 is turned to the opposite side of the utility pole D and inserted into the other rope hooking ring 57b from the cutting portion 65, and similarly, intervened between a pair of ratchets 56, 56 on the same side. The extra portion of the rope 1 pulled out from the reel 24 is stored by winding the reel 24. In this way, in a state where both the ropes 101, 102 are hooked on the pair of ratchets 56, 56, the respective ropes 101, 102 are tightened and tightened firmly. Thereby, attachment of 1st simple ladder A1 is completed.

  Also in this case, the worker can put the foot on each footrest member 2 from below and climb to the scaffolding bolt B at the lower end portion, and further climb on it to perform the restoration work. At this time, by putting the foot on each footrest member 2, each holding piece 16 is deeply fitted into each rope groove 9, and each slip prevention surface 10, 17 firmly bites into the outer peripheral surface of each rope 1, Thus, the shift of the footrest member 2 with respect to 1 can be reliably prevented. When the work is finished, the ropes 1 (101, 102) are removed from both the pairs of latitudettes 56, 56, the ropes 1 are loosened, and the respective leg members 2 are removed.

  Then, the rope 1 is wound around the rope winder 3a, and when the winding is completed, the hook ring 61 is hooked on the through hole 64 of the flange 24a in the reel 24 to prevent looseness. Moreover, the fixing band 52 is removed and the rope winder 3a is removed from the utility pole D. Further, the rotating plate 55 is bent with respect to the support plate 23. Thereby, the rope winder 3a can be made compact when not in use, and can be easily stored in the bag G. The wound rope 1 and each of the footrest members 2 are again stored in the bag G and carried.

  In the rope winder 3a according to another embodiment, the rope winder 3a can be attached to the outer peripheral surface of the utility pole D, and the rope 1 is wound around the reel 24 with the rope 1 folded in advance in two. Since it is rotated, it is easy to handle the rope 1 as well as easy to handle and the workability is improved.

  Next, a simple ladder for climbing pillars according to the second embodiment (hereinafter simply referred to as “second simple ladder”) will be described. FIG. 18 is an exploded perspective view of the second simple ladder. The second simple ladder A2 includes, for example, the vertical band 30 as a tightening string-like body and the three horizontal bands 31 as the tightening string-like bodies. Each of the vertical band 30 and the horizontal band 31 is formed from a flexible, flexible synthetic resin material. The vertical band 30 has a predetermined length, for example, a length of about 1.5 m. Each horizontal band 31 is a utility pole. It has a length that can be wound around the outer peripheral surface of D, for example, a length of about 1.3 m. Further, the horizontal bands 31 are fixed to the vertical band 30 so as to intersect at a predetermined interval along the longitudinal direction, for example, 50 to 60 cm, at right angles.

  At the upper end portion of the vertical band 30, a latching portion 32 for latching to the scaffold bolt B at the lowermost part of the utility pole D is attached. The latching portion 32 is made of a metal D-shaped ring, and is inserted into the cylindrical portion 30 a at the upper end portion of the vertical band 30. In addition, the shape of the latching | locking part 32 is not restricted to the said D type ring, For example, if it can be latched so that it may not remove easily to the scaffolding bolt B, a hook-like hook may be sufficient, for example.

  One end of each horizontal band 31 is provided with a fastener 34 as a connecting means that can be inserted through the other end and wound around the outer peripheral surface of the utility pole D. The fastener 34 is made of a metal, and as shown in FIG. 23, a horizontal rod 35a that is inserted between the side plates 34b and 34b on the base end side of the frame body 34a is connected to one end of the horizontal band 31. The upper part 31a is inserted and attached. An engagement piece 37 is pivotably pivoted on a shaft rod 36 provided at a tip side and parallel to the inside of the horizontal rod 35b provided between the side plates 34b, 34b while being separated by a predetermined distance. Be supported. The engagement piece 37 is always urged to rotate by a torsion spring 38 toward the side of the side hook 35b. On the opposing surface of the engagement piece 37 and the lateral flange 35b at the tip, there are provided engagement portions 39, 39 that engage with each other when the engagement piece 37 is urged and rotated by a torsion spring 38.

  Then, the engagement piece 37 is rotated against the elasticity of the torsion spring 38, and one end portion of the lateral band 31 is inserted into the gap between the engagement piece 37 and the front end flange 35b from the inside of the frame 34a. Insert it and pull it outward. In this state, the engagement piece 37 is released. Thereby, the horizontal band 31 is clamped between the meshing parts 39 of the engagement piece 37 and the horizontal bar 35b at the tip. In this case, the horizontal band 31 can be pulled out to the outside of the frame body 34a, but the meshing portions 39, 39 are strongly meshed with each other and cannot be pulled into the inside of the frame body 34a.

  Reference numeral 40 denotes a footrest member that is detachably attached to each of the lateral bands 31 and is formed from a hard synthetic resin material. As shown in FIGS. 19 and 22, the footrest member 40 includes a curved vertical pressing plate portion 40a that is in contact with the outer peripheral surface of the utility pole D, and an upper end edge of the pressing plate portion 40a. A horizontal footrest plate portion 40b installed on the right side, and left and right side plate portions 40c, 40c stretched between both side edges of the pressing plate portion 40a and both side edges of the footrest plate portion 40b. It is configured.

  An uneven surface 41 for preventing slipping is formed between the upper surface of the footrest plate portion 40b and the upper edge portions of the left and right side plate portions 40c, 40c, and the foot is formed on the tip edge of the footrest plate portion 40b. A stopping portion 42 is provided so as to protrude upward from the upper surface so as not to slip off the upper surface. The left and right side plate portions 40c and 40c are provided with vertically long insertion holes 43 and 43 that are located on the pressing plate portion 40a side and through which the horizontal band 31 is inserted. Thereby, the footrest member 40 can freely move along the lateral band 31.

  The second simple ladder A2 according to the present invention has the above-described configuration, and the vertical band 30 and the horizontal bands 31 are freely bendable. Therefore, as shown in FIG. A2 is stored in the bag G and stored. Similarly, in the event of a disaster such as an earthquake or storm and flood damage, when traveling to the destination on foot or by bicycle during power recovery work, carry the bag G in which the vertical band 30, horizontal band 31 and the like are stored. Thus, since the second simple ladder A2 is also compactly packed and stored in the bag G, it is lightweight, easy to carry, and safe. In particular, since the vertical band 30, the horizontal band 31, and each footrest member 40 are molded from a synthetic resin material, the overall weight can be reduced, and it is easier to carry and carry by hand.

  Therefore, in the restoration work, the second simple ladder A2 is accommodated in the bag G, and the bag G is held in the hand and headed to the destination on foot or by bicycle. After arriving at the destination, the second simple ladder A2 is taken out from the bag G, and the hook 32 at the upper end of the vertical band 30 is hooked on the scaffold bolt B at the bottom of the utility pole D as shown in FIG. At this time, the vertical band 30 is the outer peripheral surface of the utility pole D and hangs down substantially vertically along the longitudinal direction.

  In this state, the horizontal band 31 is wound around the outer peripheral surface of the utility pole D in order from the top, and the pressing plate portion 40a of the footrest member 40 is pressed and fixed to the outer peripheral surface of the utility pole D as shown in FIG. Further, as shown in FIG. 23, one end of the lateral band 31 is inserted from the inside of the fastener 34 into the gap between the engagement piece 37 and the lateral flange 35b at the tip, and pulled out to the outside as it is. Thereby, the horizontal band 31 is clamped between the meshing portions 39 and 39. In this case, when the tightening force of the lateral band 31 with respect to the outer peripheral surface of the utility pole D is weak, the lateral band 31 protruding outward from the fastener 34 is further tightly pulled. The second and third horizontal bands 31 are similarly wound. The leg members 40 are arranged alternately from left to right to make it easy to climb.

  In this way, the attachment of the second simple ladder A2 is completed as shown in FIG. At this time, the vertical band 30 positions and stabilizes the second simple ladder A <b> 2, and each leg member 40 is firmly fixed by each horizontal band 31. The vertical spacing between the respective footrest members 40 is about 50 to 60 cm, and the distance between the lowermost footrest member 40 and the ground surface is also about 50 to 60 cm. In this state, the worker climbs on the footrest members 40 in order from the bottom, moves to the scaffolding bolt B, climbs the electric pole D, and performs the work on the pole. When the work on the pole is completed, the utility pole D is lowered, the horizontal bands 31 are removed from the fasteners 34, and the hook portions 32 are removed from the scaffold bolts B. Then, the second simple ladder A2 is stored in the bag G.

  In this embodiment, the vertical band 30 and the horizontal band 31 are formed of a synthetic resin material. However, other members such as carbon fiber may be used as long as the material can be bent and reduced in weight. . Further, the footrest member 40 may be a metal such as aluminum or another member such as ceramic as long as it is a material that is hard and lightweight. In addition, the slip prevention means and the connection means in the two embodiments are not limited to those configurations, and it is needless to say that other configurations may be selected.

The perspective view which decomposes | disassembles and shows a 1st simple ladder. The perspective view seen from the front of the same leg member. The perspective view seen from the back of the same leg member. The perspective view of the footrest member of the state which opened the cover board part. The perspective view seen from the bottom of the same leg member. Explanatory drawing which shows the same attachment procedure. Explanatory drawing which shows the same attachment procedure. Explanatory drawing which shows the same attachment procedure. Explanatory drawing which shows the same attachment procedure. XX sectional drawing of FIG. The YY sectional view taken on the line of FIG. The perspective view of the state which attached the 1st simple ladder to the utility pole. The use state figure of a rope winder. The perspective view of the rope winder which concerns on other embodiment. Explanatory drawing which shows the same attachment procedure. Explanatory drawing which shows the same attachment procedure. The enlarged front view of a rope winder site | part. The expansion perspective view of the 2nd simple ladder. The perspective view of the same leg member part. The perspective view which shows the state accommodated in the bag. Explanatory drawing which shows the same attachment procedure. Side surface sectional drawing of the same leg member part. The plane sectional view of the fastener part. The perspective view of the state attached to the same utility pole.

Explanation of symbols

1 Tightened string (rope)
2 Footrest member 7a Substrate part 7b Cover plate part 9 Means for preventing slippage (rope groove)
10 Non-slip prevention means (slip prevention surface)
11 Prevention against slippage (convex part)
16 Prevention against slippage (holding piece)
17 Non-slip prevention means (slip prevention surface)
18 Prevention against slippage (concave part)
30 Vertical band 31 Horizontal band 34 Connection means (fastener)
40 Footing member 43 Insertion hole A1 1st simple ladder A2 2nd simple ladder B Scaffolding bolt D Electric pole G Bag

Claims (2)

A bendable fastening string-like body that is hooked on a scaffolding bolt planted on the utility pole and is wound around the outer peripheral surface of the utility pole; It consists of a plurality of footrest members that sometimes put feet,
The tightening string-like body is a rope having a predetermined length, and the footrest member is composed of a substrate portion disposed on an outer peripheral surface of the power pole and a cover plate portion pivotally attached to the substrate portion so as to be opened and closed. An ascending pillar provided with a slip prevention means for sandwiching the rope so as not to slip the rope against the rope between the outer surface of the substrate portion and the inner surface of the cover plate portion. A simple ladder. A bendable fastening string-like body that is hooked on a scaffolding bolt planted on the utility pole and is wound around the outer peripheral surface of the utility pole; It consists of a plurality of footrest members that sometimes put feet,
The fastening cord-like body includes a vertical band having a predetermined length and a plurality of horizontal bands that are fixedly spaced apart from each other along the longitudinal direction and fixed so as to intersect with each other. A connecting means that is detachably engaged when wound on the outer peripheral surface of each of the legs, and each leg member is provided with an insertion hole through which each lateral band is inserted. ladder.

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