JP2015146852A - Fall prevention method using winding type fall prevention device and harness type safety belt for use in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall prevention system A using a winding type fall prevention device 1 in which the weight of an object mounted on the tip of a telescopic rod 4 to be hooked to a hooked object W is light, and a connecting state between a harness type safety belt 2 and the hooked object W is configured to be always held, and to provide a harness type safety belt 2 for use in the same.SOLUTION: A winding type fall prevention device 1 is connected to a shoulder hanging belt part 21 of a harness type safety belt 2, the end of a strap 11 of the winding type fall prevention device 1 is connected to an end adjacent part 33 of a hooking hook 3, and an end 32 of the hooking hook 3 is connected and fixed to a tip part 41 of a telescopic rod 4. The telescopic rod 4 is extended from the ground and a hook part 31 of the hooking hook 3 is hooked in a hooked object W. Thereby, when coming up while rolling up the strap 11 or coming down while drawing the strap 11, a connecting state between the harness type safety belt 2 and the hooked object W is always held, and the coming-up/down can be made safely. A weight of an object mounted on the tip of the telescopic rod 4 is lightened, and thereby work performance is improved.

Description

  The present invention relates to a construction method for preventing a fall by connecting a roll-type fall preventer used for preventing a fall from a high place such as a utility pole, and a harness-type safety belt used therefor.

  In high-rise buildings such as power transmission towers, various fall-prevention rails are connected in advance in the vertical direction in the vicinity of elevating ladders, step bolts, etc., in order to prevent the workers from falling during and when working. Installed (permanent). Also, when constructing a steel tower or the like, a rope or the like for connecting a fall-preventing safety device is previously installed (temporary). However, utility poles etc. are relatively low buildings, so there are many works using aerial work platforms. Even when working up ascending poles, there are one or two workers, and utility poles are built. In addition to the large number of poles and signboards, it is difficult to install crash prevention rails, and considering the frequency of use and installation costs, it is not cost effective. There are few facilities where is taken.

  Broadly speaking, there are the following two types of measures for preventing the fall of the utility pole. One of the methods is a conventional method, in which a worker wears a safety belt on the waist and connects to one of the rings located on the waist on both sides (rope etc. + hook etc.). An electric pole is embraced, a hook at the tip of the lanyard is locked to the other ring, and the electric pole is held in a U-shape so as to be lifted and lowered (hereinafter referred to as “U-shaped lifting / lowering method”). . In this U-shaped suspension lifting method, when the hand or foot is slid, the rope turned around to the utility pole stops at the scaffolding nail, etc., and prevents sliding down to the ground. It is necessary to have both the scaffolding nail and the U-shaped rope end respectively, which is troublesome for the operator. In addition, there are obstacles that hinder the passage of U-shaped ropes such as signboards and lead-in lines in the middle of the hoistway of the utility pole. After locking the fixed object on the power pole at the position, remove the hook at the end of the lanyard that was U-shaped, move the posture to above (or below) the obstacle, and then pull the rope again It is shaped like a letter, and the lifting of the auxiliary lanyard is released and it continues to move up and down.

  Other methods are a “master rope fitting” disclosed in Patent Document 1 and a “no-falling column method” disclosed in Patent Document 2 as representative examples. These methods use a telescopic rod called an operation rod, and a suspension wire hook attached to the tip of the master rope is a suspension wire made of steel strands (wires that suspend communication cables etc. at regular intervals) ) And armrests, etc., which are attached from the ground to members that can withstand the crash impact of the upper part of the power pole, and the safety device attached to the master rope is connected to the safety belt on the pole, or the strap (belt) wind-up type fall prevention device (hereinafter “ A suspension hook attached to a suspension line, etc., is attached to the suspension line, etc., and the hook at the end of the strap is locked to the ring on the pillar safety belt, that is, the “master rope” -Winder pre-installation type lifting method ". In the U-shaped lifting / lowering method, when there is an obstacle such as a signboard when moving up and down the utility pole, it is necessary to change the hook of the main lanyard. If the procedure is incorrect, a crash may occur. On the other hand, the parent rope / winder pre-installation type lifting method installs a fall prevention device from the ground, so there is no need to change hooks even when there are obstacles when raising and lowering the utility pole, causing a crash Less likely.

  Here, the parent rope pre-installation lifting method (hereinafter referred to as “master rope lifting method”) of Patent Document 1 and the winder pre-installation lifting method (hereinafter “winding lifting method”) of Patent Document 2 are used. In comparison, the drop impact load at the time of crash prevention may be greater in the parent rope type lifting method than in the winding type lifting method. This is because in the winding type lifting method, the strap is not always pulled and loosened by the spring provided in the winding unit, but in the winding type lifting method, the lanyard connecting the safety device and the pole safety belt is loosened. This is because, when the safety device is at a position lower than the mounting position on the pillar safety belt, the drop distance becomes long and the drop impact load may become large. For workability when extending the operating rod (extensible telescopic rod) from the ground, a master rope having a strength capable of withstanding a drop impact load (for example, a φ12 mm synthetic fiber rope) is connected to the tip of the operating rod and extended. When the case is extended by hooking the wind-up type fall preventer on the tip of the operating rod, the force required for the extension is almost the same, and there is no great difference in workability. Therefore, there are an increasing number of construction companies adopting the winding type lifting method.

  Moreover, the electric pole is equipped with a plurality of electric wires and the like, and is generally wired in the order of a high-voltage electric wire, a low-voltage electric wire, and a communication line from the upper side. Specifically, the communication line has a height of about 6 m, the high-voltage wire has a height of 10 m or more, which is almost the uppermost end of the utility pole, and the low-voltage wire has a height between them. The above-described winding type lifting method is safer than the U-shaped lifting method, but it is necessary to extend an operating rod with a winding type fall prevention device attached to the tip from the ground, and the operation is 10m long. It is physically difficult to extend the bar, and it is actually used only for construction of communication lines. Even in the case of telecommunication line construction, when wind is strong, the wind-up type fall prevention device attached to the tip of the operation rod is covered with the wind, and the operation rod is extended to hook the hanging wire latch hook. It will be quite difficult to do. Furthermore, in areas such as snowy areas, the height of the communication line is 1 to 2 meters higher than other areas, and it becomes more difficult to extend the operating rod and to hook the hanging hooks. In such a case, it may be necessary to move up and down by a conventional U-shaped lifting method. Therefore, establishment of a method for reducing the weight of an object attached to the tip of an operation rod for hanging on a hanging line as much as possible is desired.

  As a technique for reducing the weight of an object attached to the tip of an operating rod for hanging on this suspension line, there is a “telephone cable operator crash prevention device” disclosed in Patent Document 3. In this method, a pulley equipped with a lightweight suspension hook for hooking is attached to the tip of the operation rod instead of the wind-up type fall preventer, and the operation rod is extended from the ground and hooked to the suspension line. Since the heavy take-up type fall preventer is installed on the ground, the work of hanging on the suspension line is relatively easy. However, since a load twice as large as the drop impact load is applied to the suspension line at the time of the fall prevention, there is a high risk that the fall line cannot be prevented when the suspension line has deteriorated over time. Actually, the current equipment can withstand a drop impact load even when the crash is prevented, but there are many places where the equipment must be reinforced when a double load is applied. In addition, the belt length of the wind-up type fall prevention device is also required twice, and the size of the device itself is considerably increased. For that reason, it has not been implemented at present.

  In addition, such a safe construction method was developed in the construction of communication lines, and the accident during the lifting and lowering of the utility pole was not eradicated despite the penetration of equipment. The cause of this is that there is a mistaken operation of hook locking when connecting the safety belt and the roll-up type fall preventer (because the hook is wrongly hooked and not locked at the place where it should originally be hooked), or due to relatively low-place work. This is because the operation of extending the operating rod and hooking the suspension hook is troublesome and the equipment is not used. In order to solve this problem, there is a “no-fall work method and equipment” disclosed in Patent Document 4 as a method of always using equipment. In this method, a roll-up type fall preventer is attached to a safety belt on a pillar worn by an operator, and the above-described U-shaped hanging posture cannot be taken unless this wind-up type fall preventer is used. It is. Although the safety is improved in this way, the process of extending the operating rod with the winding-type anti-falling device attached to the tip from the ground and hooking the hanging hook does not change, so the workability is not improved. First, it is desired to establish a method for reducing the weight of an object attached to the tip of an operating rod for hanging on a hanging line as much as possible.

Japanese Utility Model Publication No. 5-29724 JP-A-8-332241 JP 7-299153 A JP 2001-79103 A

  The main problem to be solved by the present invention is that the winding type fall prevention device of Patent Document 2 and Patent Document 4 is attached to the tip of an operating rod (extensible telescopic rod), and the operating rod is extended to hang the hanging line. In the case of strong winds, etc., the wind-up type anti-falling device attached to the tip of the operation rod is covered with the wind, which makes it difficult to extend the operation rod and to engage the suspension hook. Workability is bad. In addition, the method of attaching the pulley of Patent Document 3 to the tip of the operation rod and extending the operation rod has a good workability, but a load twice as high as the drop impact load is applied, so the suspension line has deteriorated over time. There is a high risk that the crash cannot be prevented. Furthermore, there is an erroneous operation of hook locking at the time of connecting the safety belt and the take-up type fall prevention device, and there is no use of equipment for preventing the fall.

  Therefore, the present invention is such that the weight of the object attached to the tip of the operating rod for hanging on the suspension line is light, the load is not applied to the suspension line more than the drop impact load at the time of the fall prevention, and the hook is locked. The purpose is to provide a roll-up type fall prevention device (wind-up type fall prevention device) that prevents human error such as erroneous operation and non-use of equipment, and a harness-type safety belt used therefor.

  In order to achieve the above object, the present invention provides a fall prevention method for preventing a worker from falling when the worker ascends or descends a utility pole, etc., and a strap comprising a long narrow woven belt is provided with a spiral spring. Winding-type fall prevention device with a structure that the centrifugal claw locks and stops pulling out the strap when the strap is pulled out suddenly by the urging force, the shoulder belt portion and the thigh belt portion A harness-type safety belt composed of the above, a telescopic rod called an operation rod that can be freely expanded and contracted by enclosing and stretching and storing cylindrical bodies of different diameters, and a hook for hooking having a hook, Connect the take-up type fall preventer to the shoulder belt of the harness-type safety belt with the strap pull-out port of the take-up type fall preventer facing upward, and hook the strap end of the take-up type fall preventer On the hook Continue to, to connect the latching hook and telescopic rod. Then, the telescopic hook is extended from the ground, and the hook portion of the hook for hooking is hooked on the object to be hooked. As a result, when the strap is lifted while being wound up or when the strap is lowered while being pulled out, the connection state between the harness-type safety belt and the object to be hooked is always maintained.

  In the first method, the end 32 of the hook 3 for hooking, specifically, the end 32 facing the tip of the hook 3 on the hook 31 side, and the tip 41 of the telescopic hook 4 are connected and fixed. The telescopic hook 4 is extended from the ground, and the hook 31 of the hook 3 for hooking is hooked to the article W to be hooked. As a result, when the strap 11 is lifted while being wound up or when the strap 11 is pulled down while being pulled out, the connected state of the harness-type safety belt 2 and the object W to be hooked is always maintained.

  In the second method, the hook 6 for hooking has a flange 61 and an annular body 62, and the telescopic hook 4 is provided with a hook-like tool 45 at its tip, and the hook 6 for hooking The ring body 62 is hung on the hook 45 to open the hooking space K, the telescopic hook 4 is extended from the ground, and the hook 61 of the hook 6 for hooking is hooked to the hooked object W. Here, the annular body 62 of the hook 6 for latching is removed from the hook 45, and the latching space K is closed. At this time, the telescopic rod 4 is stored so as not to obstruct the lifting. As a result, when the strap 51 is lifted while being wound up or when the strap 51 is pulled down while being pulled out, the connected state of the harness-type safety belt 2 and the object W to be hooked is always maintained.

  The harness-type safety belt 2 according to the present invention includes a shoulder belt portion 21, a thigh belt portion 22, a wind-up type fall preventer 1, and a hook 3 for hooking connected thereto. In this wind-up type fall prevention device 1, a strap 11 composed of a long narrow woven belt is always wound up by the urging of a spiral spring, and when the strap 11 is pulled out suddenly, the centrifugal claw is locked. Thus, the pull-out of the strap 11 is stopped. The hook 3 for hooking has a collar 31 and is connected to the end of the strap 11. Then, the take-up type fall prevention device 1 is fixedly or detachably connected with the strap lead-out port 14 facing upward through the human back portion 21b of the shoulder belt portion 21 or the connecting portion 23 of the front portion of the human chest. As a result, the stretchable hook 4 connected to the hook 3 is extended from the ground, and the hook 31 of the hook 3 is hooked to the upper object W while the strap 11 is wound. When ascending or descending while pulling out the strap 11, the connection state between the shoulder belt portion 21 and the object W to be hooked is always maintained.

  Preferably, the connecting portion 23 is constituted by the ring 231 provided on the human body back portion 21b or the front of the human chest of the shoulder belt portion 21, and the fixing bracket 12 or the connecting hook 125 provided in the wind-up type fall prevention device 1. The take-up type fall prevention device 1 is fixedly or detachably connected to the shoulder belt portion 21.

  More preferably, the connecting portion 23 is constituted by a connecting hook 236 provided on the human back 21b of the shoulder belt portion 21 or the front of the human chest and the ring 16 provided in the wind-up type fall preventer 1 to The take-up type fall prevention device 1 is detachably connected to the belt portion 21.

  Work using the fall prevention method using the wind-up type fall prevention device of the present invention and the weight of the object attached to the tip of the telescopic hook for hanging on the hanging line is reduced by using the harness-type safety belt used in the fall prevention method. When the cable is lifted while the strap is wound up or lowered while the strap is pulled out, the harness-type safety belt and the hooked object are always kept in the connected state. it can. In addition, when the crash is prevented, a load greater than the drop impact load is not applied to the suspension line, and it is not necessary to reinforce the equipment, which is economical. Furthermore, since a human error such as an erroneous operation of hooking the pole safety belt or a non-use of equipment can be prevented, safety is improved.

It is explanatory drawing which showed the fall prevention system A which concerns on Example 1 of this invention. It is the front view and side view which attached the winding type fall preventer 1 to the harness type safety belt 2 which concerns on Example 1 of this invention. It is the front view and side view which expanded the winding type fall prevention device 1 attachment principal part of FIG. It is the front view and side view which showed the harness type safety belt 2 which concerns on Example 1 of this invention. It is the front view and side view which showed the back pad 25 of the harness type safety belt | band | zone 2 which concerns on Example 1 of this invention. It is explanatory drawing which showed the extending | stretching state and accommodation state of the expansion and contraction basket 4 which concerns on Example 1 of this invention. It is a principal part enlarged view of FIG. 1 which concerns on the hook 3 for latching of Example 1 of this invention. It is explanatory drawing which showed the use condition 1 of the fall prevention system A which concerns on Example 1 of this invention. It is explanatory drawing which showed the use condition 2 of the fall prevention system A which concerns on Example 1 of this invention. It is the front view and side view which expanded the principal part of winding-type fall prevention device 1C which concerns on Example 1-2 which is a modification of Example 1 of this invention. It is the front view and side view which expanded the principal part of winding-type fall prevention device 1D which concerns on Example 1-3 which is a modification of Example 1 of this invention. It is the front view (photograph) and back view (photograph) which showed the harness type safety belt | band | zone 2F which concerns on Example 1-4 which is a modification of Example 1 of this invention. It is explanatory drawing which showed the fall prevention system B which concerns on Example 2 of this invention. It is a principal part enlarged view of FIG. 13 which concerns on the hook 6 for latching of Example 2 of this invention. It is explanatory drawing which showed the use condition of the fall prevention system B which concerns on Example 2 of this invention. It is the perspective view which showed the conventional winding type fall prevention device 7. FIG. It is sectional drawing of the conventional winding type fall preventer 7. FIG. It is a front view of the lock mechanism of the conventional winding type fall prevention device 7. FIG. It is a lock state front view of the conventional winding type fall prevention device 7. FIG.

  Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a crash prevention system A according to Embodiment 1 of the present invention. As shown in this figure, the fall prevention system A includes a strap take-up type wind-up fall preventer 1, a harness-type safety band 2, a hook 3 for hooking, and a telescopic hook 4.

  2 (a) and 2 (b) are a front view and a side view of the harness-type safety belt 2 according to the first embodiment of the present invention attached with the take-up type fall prevention device 1, and FIGS. 3 (a) and 3 (b). ) Is an enlarged front view and side view of the main part of the winding type fall preventer 1 attached, and FIGS. 4A and 4B show the harness-type safety belt 2 according to the first embodiment of the present invention. It is a front view and a side view. As shown in these drawings, the harness-type safety belt 2 includes a shoulder belt portion 21 and a thigh belt portion 22, and includes a roll-up type fall prevention device 1 and a torso belt 24. Although not shown for ease of explanation, a back pad 25 and a lanyard (U-shaped lanyard) 26 are also provided.

In this wind-up type fall prevention device 1, a strap 11 composed of a long narrow woven belt is always wound up by the urging of a spiral spring, and when the strap 11 is pulled out suddenly, the centrifugal claw is locked. Thus, the pull-out of the strap 11 is stopped.
16 is a perspective view showing a conventional take-up type fall preventer 7, FIG. 17 is a sectional view of the conventional take-up type fall preventer 7, and FIG. 18 is a conventional take-up type fall preventer 7. FIG. 19 is a front view of a lock state of the conventional winding type fall preventer 7. Since the internal structure of the wind-up type fall preventer 1 according to the present invention is the same as that of the conventional wind-up type fall preventer 7, the “no-falling column method” disclosed in Patent Document 2 is cited first. The structure will be described.

  As shown in FIGS. 16 to 19, the wind-up type fall preventer 7 is provided with a shaft hole 712 in the center part of both sides of an iron frame 711 bent in a substantially U shape, and a shaft 713 is provided between the shaft holes 712. A bobbin 714 is fitted and fixed to the shaft 713. A ring plate 716 provided with ratchet teeth 715 on the inside is attached between one side inner side of one frame 711 and the bobbin 714, and a spiral spring 717 is provided on the side wall of the bobbin 714 on the other frame 711 side. It is arranged, one end is fixed to the shaft 713, and the force for winding the strap 71 around the bobbin 714 is urged. A centrifugal claw 718 is provided at an eccentric position on the side wall of the bobbin 714 on the ring plate 716 side, and is normally pulled by a tension spring 719 so as to be able to rotate together with the bobbin 714. The structure rotates around the position by the inertia force against the pulling spring 719, contacts and meshes with the ratchet teeth 715, stops the rotation of the bobbin 714, and prevents the strap 71 from being pulled out. Further, a U-shaped ring 720 is provided at the upper end of the U-shaped frame 711, and the mechanism is covered with a resin cover 721.

  As shown in FIGS. 4 (a) and 4 (b), the shoulder belt portion 21 of the harness-type safety belt 2 has a pair of belts 211 and 211 extending from the front of the chest over the human back portion 21b, and then downward. Both ends of the pair of thigh belt portions 22 and 22 are stitched and connected to the lower end portion and the lower end portion on the front side of the chest, respectively. And the ring 231 is provided in the human body back part 21b.

  As shown in FIG.2 and FIG.3, the winding type fall prevention device 1 of this invention is arrange | positioned in the harness type safety belt 2 with the drawer | drawing-out port of the strap 11 facing up. And the fixing metal fitting 12 is provided in the lower end part of the winding type fall prevention device 1 which opposes the drawer | drawing-out opening | mouth of the strap 11. FIG. In this embodiment, the fixing bracket 12 is a U shackle 121, and the ring 231 of the harness type safety belt 2 and the end portion of the wind-up type fall preventer 1 are fixed by the U shackle 121. Specifically, the U shackle body is inserted into the hole of the ring 231, and the hole of the wind-up type fall preventer 1 at the end and both the holes of the U shackle 121 are axially fixed by rivets. In other words, the present embodiment has a structure in which the wind-up type fall preventer 1 and the harness-type safety belt 2 are bound and cannot be separated. Although not shown in the drawings, the retractable fall preventer 1 has the pull-out opening of the strap 11 facing upward, so that it does not turn over due to its own weight when no tension is applied to the strap 11. As shown in FIG.

  5A and 5B are a front view and a side view showing the back pad 25 of the harness-type safety belt 2 according to the first embodiment of the present invention. Although not shown in FIGS. 2 and 4 for ease of explanation, the harness-type safety belt 2 includes a back pad 25. In this embodiment, a plurality of hook-and-loop fasteners 252 are sewn to the pad 251 as shown in FIG. The back pad 25 is attached to the shoulder belt portion 21 by winding the belt 211 of the shoulder belt portion 21 of the harness-type safety belt 2 and joining the hook surface and loop surface of the hook-and-loop fastener 252.

  6 (a) and 6 (b) are explanatory views showing the stretched state and the retracted state of the telescopic ridge 4 according to the first embodiment of the present invention. As shown in these figures, the expansion / contraction bar 4 is composed of five stages of cylindrical bodies having different diameters, and each of the four stages is enclosed in a cylindrical body having a single diameter, and can be freely expanded and contracted by sequentially stretching and storing. . In this embodiment, the length when stretched is about 6 m, and the length when stored is about 1.5 m.

  FIG. 7 is an enlarged view of the main part of FIG. As shown in this figure, the hook 3 for latching is fixed to the tip 41 of the telescopic rod 4. Specifically, the end 32 of the hook 3 for hooking, specifically, the end 32 facing the tip of the hook 3 on the hook 31 side, and the tip 41 of the telescopic hook 4 are fixedly connected. And the edge part adjacent part 33 of the hook 3 for latching and the strap edge part 111 of the winding type fall preventer 1 are connected.

  The basic structure of the hook 3 for hooking and the telescopic hook 4 is the same as the “master rope mounting tool” disclosed in Patent Document 1, and the hook 3 for hooking is a hooked object such as a structure. A hook 31 that is hooked to W, an end 32 that can be connected to the telescopic hook 4, and an opening / closing cap 34 that is a device that prevents the hook W from being hooked. The opening / closing cap 34 is a pivotable opening / closing type. When the cap 34 is closed, the cap 34 is in contact with the flange 31 to close the hooking space K, which is a space in the hook 31, and when the cap 34 is opened, the opening W is connected to the object W. It can be latched. Although not shown, the open / close cap 34 has a spring that biases the hooking space K in the closing direction. When the hook 3 for hooking is hooked on the object W to be hooked, it can be hooked against the bias of the spring. The hook 3 for hooking has a threaded portion (threaded portion) as shown in FIG. 4 of Patent Document 1, and the opening / closing cap 34 is opened by rotating the telescopic hook 4 itself, so The latch on the object W can be released.

  Moreover, this fall prevention system A is used for fall prevention from a high place such as a utility pole, and it is necessary to be able to carry out work while keeping one's weight in the above-described U-shaped suspended state. Therefore, the harness-type safety belt 2 is a type combined with a safety belt on the pillar, that is, a lanyard (U-shaped lanyard) including a torso belt 24, a strong rope 261, and an expansion / contraction adjuster 262 for adjusting the lanyard length to be used. ) 26.

  Further, as shown in FIG. 1, the expansion / contraction adjuster 262 of the lanyard 26 is connected to the body belt 24 of the harness-type safety belt 2. This is similar to the “no-falling work method and equipment” disclosed in Patent Document 4 and improves safety by preventing the U-shaped hanging posture from being taken unless the winding-type fall prevention device 1 is used. Is. In the present embodiment, the retractable fall preventer 1 and the harness-type safety belt 2 are bonded and cannot be separated, so if any part of the components of the expansion / contraction adjuster 262 and the harness-type safety belt 2 is connected. The same effect can be obtained.

  8 and 9 are explanatory views showing the usage state of the crash prevention system A according to the first embodiment of the present invention. With reference to these figures, a method of using the crash prevention system A will be described. First, as shown in FIG. 8, an operator wearing a harness-type safety belt 2 equipped with a wind-up type fall preventer 1 extends a telescopic hook 4 on the ground and is used for latching provided at the tip of the telescopic hook 4. The hook 3 is hooked on the hooked object W. At this time, the strap 11 of the wind-up type fall preventer 1 is pulled out against the bias of the spring 717 as the telescopic rod 4 is stretched. Thereby, the worker wearing the harness-type safety belt 2 and the object W to be hooked are connected.

  Next, as shown in FIG. 9, the operator raises the pole after fixing the lower end of the telescopic rod 4 to the utility pole. As described above, when the strap 11 is lifted while being wound up or when the strap 11 is pulled down while being pulled out, the connected state of the harness-type safety belt 2 and the object W to be hooked is always maintained. In addition, the structure of a present Example is a utility pole, and the to-be-hung thing W is a suspension line installed in the height of about 6 m, However, the to-be-hung object W is not a suspension line installed in the utility pole. It is sufficient that the hook 3 for holding the hook 3 is fast enough to be hooked to the article W to be hooked, specifically, a strong one positioned at a height of about 6 m.

  As described above, by using the fall prevention system A using the winding type fall preventer 1 of this embodiment and the harness-type safety belt 2 used for the fall prevention system A, the expansion and contraction for hanging on the object W to be hung is performed. Since the weight of the object attached to the tip of the heel 4 is reduced, the workability is improved, and the harness-type safety belt 2 and the object to be hung up when the strap 11 is lifted while being wound or when the strap 11 is pulled down Since the connection state with W is always maintained, it can be safely moved up and down.

  In addition, since a load larger than the drop impact load is not applied to the suspension line that is the object W to be stopped at the time of falling prevention, and it is not necessary to reinforce the equipment for installing the communication line, the economy is good. Further, since the lanyard 26 and the wind-up type fall preventer 1 are connected, it is possible to prevent a human error such as an erroneous operation when the wind-up type fall preventer 1 is connected and a non-use of the wind-up type fall preventer 1. Because it is possible, safety is improved.

<Example 1-2>
Hereinafter, Example 1-2 which is a modification of Example 1 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the structure having a difference from the first embodiment is compared with the first embodiment. In the winding type fall preventer 1 of the first embodiment, the U shackle 121 is used for the fixing metal 12, but in the winding type fall preventer 1C of the first embodiment 1-2, the connection hook 125 is detachably connected. ing.

  FIGS. 10A and 10B are an enlarged front view and side view of a main part of the winding type fall preventer 1C mounting according to Example 1-2, which is a modification of Example 1 of the present invention. As shown in these drawings, the take-up type fall prevention device 1C includes a connecting hook 125 at an end portion of the strap 11 facing the drawer port. This connection hook 125 has a structure that can be locked to the ring 235 of the harness-type safety belt 2C, and is detachably connected. Therefore, the winding type fall preventer 1C and the harness-type safety belt 2C can be separated when not needed or transported.

  The connection between the connection hook 125 and the ring 235 must not be easily disconnected, and it is not necessary to remove the connection hook 125 frequently. Therefore, in this embodiment, the connection between the trunk belt of the general pole safety belt and the expansion / contraction adjuster is performed. The same ones used for the are used. However, the take-up type fall preventer 1C has the strap 11 with the outlet opening facing upward, so that the hook-and-loop type fall preventer 1 does not turn over when the strap 11 is not tensioned. It is necessary to temporarily fix to the harness-type safety belt 2 with, for example.

  By using the fall prevention system A2 using the winding type fall prevention device 1C of the present embodiment and the harness type safety belt 2C used for the fall prevention system A2, the front end of the telescopic hook 4 for hanging on the object W to be hooked is used. Since the weight of the object to be attached is reduced, the workability is improved, and the harness-type safety belt 2C and the hooked object W are connected to each other when the strap 11 is lifted while being wound up or when the strap 11 is pulled down. Can be safely moved up and down.

<Example 1-3>
Hereinafter, Example 1-3 which is a modification of Example 1 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the structure having a difference from the first to third embodiments is described with respect to the first embodiment. The harness-type safety belt 2 of the first embodiment has the ring 231 on the human back 21b, but the harness-type safety belt 2D of the first to third embodiments has the connection hook 236 on the human back 21b. The take-up type fall preventer 1D includes a ring 16 and is detachably connected.

  FIGS. 11A and 11B are an enlarged front view and side view of a main part of the winding type fall preventer 1D mounting according to Example 1-3, which is a modification of Example 1 of the present invention. As shown in these drawings, the harness-type safety belt 2D has a connection hook 236 on the human back 21b, and the wind-up type fall preventer 1D is at the end of the strap 11 facing the drawer port. A ring 16 is provided. This connection hook 236 has a structure that can be locked to the ring 16 of the take-up type fall preventer 1D, and is detachably connected. The effect of this example is the same as that of Example 1-2.

<Example 1-4>
Hereinafter, Example 1-4 which is a modification of Example 1 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the structure having a difference from the first to fourth embodiments is described with respect to the first embodiment. Although the harness-type safety belt 2 of the first embodiment includes the ring 231 on the human body back portion 21b, the harness-type safety belt 2F of the first to fourth embodiments includes the ring 237 on the human chest front portion 21f. Yes.

  FIGS. 12A and 12B are a front view (photograph) and a rear view (photograph) showing a harness-type safety belt 2F according to Embodiment 1-4, which is a modification of Embodiment 1 of the present invention. This harness-type safety belt 2F includes a ring 237 on the front of the human chest 21f. Although not shown, the fixing bracket 12 of the take-up type fall preventer 1 is fixedly or detachably connected to the ring 237. As a result, when the strap 11 is lifted while being wound up or when the strap 11 is pulled down while being pulled out, the connected state of the harness-type safety belt 2F and the object W to be hooked is always maintained. it can. Further, instead of the ring 237, the human chest front part 21f may be provided with a connection hook 236, which has the same effect as the embodiment 1-3.

  However, when the wind-up type fall prevention device 1 is attached to the front part 21f of the human chest, the strap 11 pulled upward comes to the front part of the face, which may hinder the raising and lowering. At this time, the strap 11 is in a state where tension is constantly applied by the urging of the spiral spring 717, and the falling distance at the time of the fall prevention is the shortest and safe, but the operator is constantly pulled upward. Therefore, the strap 11 swings to the left and right at the front of the face when raising and lowering the utility pole, which is troublesome when raising and lowering. Therefore, it is preferable that the retractable fall prevention device 1 is attached to the human back 21b.

  It is also possible to attach the wind-up type fall prevention device 1 to the waist belt 24 of the harness-type safety belt 2 or the waist portion of the safety belt on the pillar composed of the belt belt 24 and the lanyard 26, but the strap is drawn upward. 11 is caught on the arm when it is raised and lowered, and sometimes the posture is lost due to the strap 11 that is caught. Therefore, like the front part 21f of the human chest, this position is also the retractable fall preventer 1 This is not preferable as the mounting position. Accordingly, it is desirable to attach the winding type fall preventer 1 to the human back 21b. However, in the lifting equipment that does not have enough space in the back, such as a fixed ladder with a backrest (ladder with an enclosure on the back side) and a ladder of a wind power tower instead of a utility pole, the front part of the human chest 21f and the trunk belt 24 Attaching the wind-up type fall prevention device 1 is also a possible method.

  A position where the winding type fall preventer 1 is attached to the harness type safety belt 2 will be described. First, regarding the height (longitudinal) direction, if it falls below the center of gravity of the human body, the fall distance becomes longer when the fall is prevented and the impact load becomes larger, and the posture of the human body when the fall is prevented becomes unstable. A higher position is desirable. Therefore, the method of attaching to the waist belt 24 is not preferable because it is lower than the center of gravity. Next, with respect to the left and right (lateral) direction, the impact load applied to the human body at the time of fall prevention is offset at the position on the side of the human body where the D-ring is attached to either the belt 211 or the waist belt 24 of the shoulder belt portion 21. Therefore, the position of the human body when the fall is prevented becomes unstable. Therefore, it is desirable that the position is not eccentric, that is, the vertical center line when a person stands.

  Embodiment 2 of the present invention will be described below. The same parts as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. Only the structure having a difference in the second embodiment with respect to the first embodiment will be described.

  FIG. 13 is an explanatory view showing a fall prevention system B according to the second embodiment of the present invention, and FIG. 14 is an enlarged view of a main part of FIG. As shown in these drawings, the fall prevention system B includes a strap take-up type wind-up fall preventer 5, a harness-type safety belt 2, a hook for hook 6, and a telescopic hook 4. The hook 6 for hooking has a flange part 61 and an annular body 62, and an end part 63 facing the tip of the hook 6 for hooking on the hook part 61 side of the take-up type fall preventer 5. The strap 51 is connected to the strap end 511. This connection may be directly attached, but it is desirable to have a return function. A hook-like tool 45 is attached to the tip 41 of the telescopic hook 4. As shown in FIG. 14, the annular body 62 has a ring-shaped portion 621, and the hook 45 can be easily hooked and removed from the ring-shaped portion 621. Further, the attachment of the harness-type safety belt 2 and the winding-type fall prevention device 5 to the harness-type safety belt 2 is the same as that of the first embodiment, and the strap drawer port 54 is attached upward.

  FIG. 15 is an explanatory view showing a use state (lifting state) of the fall prevention system B according to the second embodiment of the present invention. A method of using the crash prevention system B will be described with reference to FIG. The basic structure of the latching hook 6 of the fall prevention system B is the same as the latching hook of the “no-falling hoisting column method” of Patent Document 2, and will be described with some references.

  First, the annular body 62 of the hook 6 for hooking is hung on the hook-shaped tool tip 451 of the hook-shaped tool 45 attached to the telescopic rod 4. The annular body 62 of the hook 6 for hooking has a structure that rotates by its own weight such as the strap 51 and the tension that the strap 51 is wound by the urging force of the spiral spring 717. The hooking space K is opened and the hooked object W can be hooked. Next, the telescopic hook 4 is extended from the ground, and the hook 61 of the hook 6 for hooking is hooked to the article W to be hooked. At this time, the strap 51 of the wind-up type fall preventer 5 is pulled out against the urging force of the spring 717 as the telescopic rod 4 is stretched, and the worker and the object W are connected.

  Subsequently, the annular body 62 of the hook 6 for hooking is removed from the hook-like tool tip 451 of the hook-like tool 45. Thereby, the latching space K of the latching hook 6 is closed. At this time, the annular body 62 has a structure that does not open the latching space K even when an external force is applied. As a result, when the strap 51 is lifted while being wound up or when the strap 51 is pulled down while being pulled out, the connected state of the harness-type safety belt 2 and the object W to be hooked is always maintained. In addition, the stretchable eaves 4 that have been stretched are stored in a contracted manner so as not to obstruct the elevation.

  As described above, by using the fall prevention system B using the winding type fall preventer 5 of the present embodiment and the harness type safety belt 2 used for the fall prevention system B, the extension hook for hanging on the object W to be hooked is used. Since the weight of the object attached to the tip of 4 is reduced, the workability is improved, and the harness-type safety belt 2 and the object W to be secured W Since the connected state is always maintained, it can be safely moved up and down. In addition, since a load larger than the drop impact load is not applied to the hanging object W such as a hanging line at the time of the fall prevention, it is not necessary to reinforce the equipment, so that the economy is good. Furthermore, since a human error such as an erroneous operation of hooking the pole safety belt or a non-use of equipment can be prevented, safety is improved.

A, B Fall prevention system 1, 1C, 1D Winding type fall prevention device 11 Strap 111 Strap end 12 Fixing bracket 121 U shackle 125 Connecting hook 14 Strap drawer port 16 Ring 2, 2C, 2D, 2F Harness type safety belt DESCRIPTION OF SYMBOLS 21 Shoulder belt part 211 Belt 21b Human body back part 21f Human chest front part 22 Thigh belt part 23 Connection part 231 Ring 235 Ring 236 Connecting hook 237 Ring 24 Body belt 25 Back pad 251 Pad 252 Surface fastener 26 Lanyard (U-shaped suspension) For lanyards)
261 Rope 262 Stretching adjuster 3 Hook for hooking 31 Hook part 32 End part 33 End adjoining part 34 Opening and closing cap 4 Telescopic hanger 41 Tip part 45 Hook-shaped tool 451 Hook-shaped tool tip part 5 Retractable fall prevention device 51 Strap 54 Strap outlet 6 Hook for hooking 61 Hook part 62 Annular body 621 Ring-shaped part 63 End part 7 Conventional take-up type fall prevention device K Latching space W Wing thing (hanging line)

Claims (6)

A fall-prevention method that prevents the operator from falling when moving up and down on a utility pole,
A strap composed of a long narrow woven belt is always wound by the urging of the spiral spring, and when the strap is pulled out suddenly, the centrifugal pawl locks and stops pulling out the strap. In the type fall prevention device, a hook for hooking having a collar is connected to an end of the strap,
The wind-up type fall prevention device is connected to the shoulder belt portion constituting the harness type safety belt with the strap outlet of the wind-up type fall prevention device facing upward,
Extending the expansion and contraction hook connected to the hook for hooking from the ground, and hooking the hook part of the hook for hooking on the upper object to be hooked,
A winding type fall prevention, wherein the harness-type safety belt and the hooked object are always kept in a connected state when the strap is raised while being wound or when the strap is lowered while being pulled out. Fall prevention method using a container. The end of the hook for hooking is connected to the tip of the telescopic hook,
By extending the stretchable hook from the ground and hooking the hook part of the hook for hooking on the object to be hooked,
The connected state between the harness-type safety belt and the object to be hooked is always maintained when the strap is lifted while being wound or when the strap is lowered while being pulled out. A fall prevention method using a wind-up type fall prevention device. The hook for hook has a collar and an annular body;
The telescopic hook has a hook-like tool at its tip,
By hanging the annular body of the hook for hooking on the hook-like tool, extending the telescopic hook from the ground, and hooking the hook part of the hook for hooking on the object to be hooked,
The connected state between the harness-type safety belt and the object to be hooked is always maintained when the strap is lifted while being wound or when the strap is lowered while being pulled out. A fall prevention method using a wind-up type fall prevention device. It consists of a shoulder belt part, a thigh belt part, a wind-up type fall prevention device, and a hook for hooking connected to it,
The take-up type fall prevention device is such that a strap comprising a long narrow woven belt is always taken up by the urging of a spiral spring, and when the strap is pulled out suddenly, the centrifugal claw locks and the strap Is a structure that stops the drawer of
The hook for hooking has a hook and is connected to an end of the strap;
The winding type fall prevention device is fixedly or detachably connected with the strap lead-out port facing upward through a connecting portion of the shoulder belt portion of the human back or the front of the human chest. Harness type safety belt.   The connecting part is constituted by a ring provided on the back of the human body or the front of the human chest of the shoulder belt part, and a fixing metal fitting or a connecting hook provided in the take-up type fall preventer, and the take-up type fall The harness-type safety belt according to claim 4, wherein the preventer is fixedly or detachably connected.   The connecting portion is composed of a connection hook provided on the human back of the shoulder belt portion or the front of the human chest, and a ring provided in the wind-up type fall preventer, and the wind-up type fall preventer The harness-type safety belt according to claim 4, wherein the harness-type safety belt is detachably connected.

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