JP5052083B2 - Fall prevention system for snow removal work - Google Patents

Description

The present invention relates to a fall prevention system for snow removal work , and more particularly, to a fall prevention system for an operator who performs a snow removal work on a roof.

The snow-removing work for dropping the snow on the roof is an important work in winter. Conventionally, a person (operator) who performs snow removal work has gone up a ladder and performed snow removal work on a ladder. Conventional ladders are known that are designed to make it easier for workers to climb or to make it difficult for the ladder to fall when leaning against a roof (for example, Patent Document 1 and Patent Document 1). 2).
JP-A-56-20262 JP 11-247571 A

  By the way, by devising the ladder, the safety of the worker when going up the ladder is improved, but the problem is that the safety is not secured when the worker is climbing up the roof and removing the snow from the ladder There is.

  In other words, when climbing the ladder and reaching the roof and snowing down, there is a risk of the operator slipping on the roof and falling down on the roof. There is a risk that. In particular, since the coefficient of friction between the operator's feet and the roof is reduced due to the presence of snow, water generated by melting snow, ice formed by freezing water, etc., the above problem is more remarkable. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide a fall prevention system for snow removal work that can ensure the safety of the worker when performing snow removal work .

  According to the first aspect of the present invention, there is provided a main body ladder to be leaned against the roof, one end portion in the longitudinal direction is integrally installed on the main body ladder, and the other end portion in the longitudinal direction is fixed to the other end portion of the roof. A fall prevention system for snow lowering work having a rope ladder installed on the roof.

  The invention according to claim 2 is the fall prevention system for snow lowering work according to claim 1, wherein the main body ladder is provided on the main body ladder on the other end side of the main body ladder, and the main body ladder is leaned against an end of the roof. In this case, the fall prevention system has a horizontal ladder that extends substantially horizontally above the roof.

  The invention according to claim 3 is the fall prevention system for snow lowering work according to claim 1 or claim 2, wherein one end of the rope is fixed to the rope ladder, the rope is attached to the rope, and the rope is attached to the rope. An expansion / contraction adjuster capable of restricting movement, and the expansion / contraction adjuster is a fall prevention system for snow lowering work that is engaged with an operator and configured to allow the snow to be lowered while the rope is stretched.

  According to the present invention, there is an effect that it is possible to ensure the safety of the worker when performing snow removal work.

[First Embodiment]
FIG. 1 is a perspective view showing a schematic configuration of a snow-falling work fall prevention system 1 according to the first embodiment of the present invention, and FIG. FIG. 2 is a view taken along arrow II in FIG. 1.

  The snow fall work fall prevention system (hereinafter sometimes simply referred to as “fall fall prevention system”) 1 is intended to prevent, for example, an operator who performs snow removal work on the roof 3 from falling from the roof 3. There is a main body ladder 5 leaning between the end 3A of the roof 3 and the ground GL, one end in the longitudinal direction is installed integrally with the main body ladder 5, and the other end in the longitudinal direction is the other end of the roof 3. A rope ladder 7 fixed to the end 3B and installed on the roof 3 on the roof 3 is provided. The roof 3 is formed in a mountain shape (inverted “V” shape) in a side view.

  The main body ladder 5 is configured by attaching vertical bars (two long members) 9 and a number of horizontal bars (horizontal members) 11 as footholds between the vertical members (vertical members) 9. The material 9 and the cross member 11 are made of a rigid material (a material having resistance) such as aluminum.

  The main body ladder 5 is leaned against the roof 3 in a state where the intersection angle θ with the ground GL is about 75 °, for example. In the state leaned in this way, the cross member 11A located at the top of each cross member 11 is near the end 3A of the roof 3 (for example, between the lower 30 cm and the upper 20 cm, preferably, Between 15 cm below and 10 cm above; in FIG. 1 and FIG. 2, the vertical member 9 has a predetermined length above the end 3 </ b> A of the roof 3. (When the worker stands on the uppermost cross member 11A while standing, the height at which the worker can stand in a stable state with his / her hand; for example, 50 cm to 200 cm; preferably Protrudes by 80 cm to 150 cm).

  Therefore, the cross member 11 is provided near the one end on the one end of the main body ladder 5 in the longitudinal direction (the extending direction of the vertical member 9) (the portion that is down when standing). Since the cross member 11 is not provided from the other end portion of the main body ladder 5 in the longitudinal direction (the portion that is up when standing) to the vicinity, the vertical member 9 having the handrail 13 extends. is there. The handrail 13 is made of a rigid material such as aluminum, like the vertical member 9 and the like, and is provided over almost the entire length of each vertical member 9 of the main body ladder 5.

  An auxiliary member (auxiliary member made of a rigid material such as aluminum) 15 is provided on one end of the main body ladder 5 (a portion that is lowered when the main body ladder 5 is stood). An inverted “V” -shaped stepladder 17 is formed on one end of the main body ladder 5. And the main body ladder 5 can be leaned against the roof 3 in a stable state.

  More specifically, an auxiliary member 15 having a predetermined length is rotatably provided on one end portion side of the longitudinal member 9, and the auxiliary member 15 rotates to turn the distal end portion of the auxiliary member 15 (FIG. 1). When the lower end portion of the vertical member 9 is separated from the one end portion (lower portion) of the vertical member 9 by a predetermined distance, an inverted “V” -shaped stepladder 17 is formed. A stopper 19 is provided between the vertical member 9 and the auxiliary member 15 so that the inverted “V” shape of the stepladder 17 can be maintained. In addition, since the auxiliary member 15 is provided in each vertical member 9, there exist two, and each of the two auxiliary members 15 is connected to each other by the connecting member 21, and rotates synchronously. It is like that.

  The main body ladder 5 has a gripping member (a material having rigidity such as aluminum) that holds the end portion 3A of the roof 3 in cooperation with the vertical member 9 of the main body ladder 5 when the main body ladder 5 is stood on the roof 3. A configured gripping member) 23 is provided. The gripping member 23 includes a rod-shaped first portion 25 and a rod-shaped second portion 27 extending from one longitudinal end of the first portion 25 and is formed in a substantially “L” shape. ing. The crossing angle between the extending direction of the first portion 25 and the extending direction of the second portion 27 is an obtuse angle, for example, about 135 °. In addition, a plurality of engagement holes that can be rotatably engaged with the longitudinal member 9 are provided in an intermediate portion in the longitudinal direction of the first portion 25.

  The gripping member 23 is rotatably engaged with the longitudinal member 9 through the engagement hole in the longitudinal direction of the first portion 25, and the engaging portion of the gripping member 23 is in accordance with the shape of the roof 3. It is possible to adjust the rotational position of the gripping member 23 (the position of the gripping member 23 relative to the longitudinal member 9) by moving (changing) the engagement hole.

The portion of the vertical member 9 with which the gripping member 23 is engaged is located at a position away from the end 3A of the roof 3 by a predetermined distance downward when the main body ladder 5 is stood on the roof. The second portion 27 is provided in the first portion 25 at an angle that faces the roof 3 (upward).

  One end of a rope 29 is integrally provided at the other end of the first portion 25, and the other end of the rope 29 is connected to a rope tensioner 31. The rope tensioner 31 is provided below the part of the main body ladder 5 with which the gripping member 23 is engaged (on one end side of the longitudinal member 9). A contact member 33 having a flat surface that comes into contact with the lower surface of the roof of the roof 3 is rotatably provided at the tip of the second portion 27. There are two gripping members 23 provided with the abutting members 33 because they are provided on each longitudinal member 9, and the two gripping members 23 are connected to each other by a connecting member 34. And turn.

  Then, when the main body ladder 5 is stood against the roof 3, the gripping member 23 is appropriately rotated so that the flat surface of the abutting member 33 is brought into contact with the lower surface of the roof 3, and the rope 29 is attached by the rope tensioner 31. If it is fixed while being pulled with a predetermined force, the roof 3 can be sandwiched between the vertical member 9 and the gripping member 23 (contact member 33), and the main body ladder 5 can be firmly fixed to the roof 3. It has become.

  In addition, the engaging portion of the gripping member 23 is selected to select one of the plurality of engaging holes at the intermediate portion in the longitudinal direction of the first portion 25 so as to be freely engaged with the longitudinal member 9. Therefore, it is possible to adjust the rotation position of the gripping member 23 by changing the engagement hole in accordance with the shape of the roof of the roof 3, and the vertical member 9 and the gripping member 23 (contact member 33) Thus, the roof 3 can be securely sandwiched, and the main body ladder 5 can be more firmly fixed to the roof 3.

Rope ladder 7, and two long wood made of rope (rope) 35, rungs for Years stages as a foothold mounted between the rope 35 (horizontal members) 37 is composed of a horizontal member 37 For example, it is made of a rigid material such as aluminum or resin. A hook 39 is provided at one end of the rope ladder 7 in the longitudinal direction (longitudinal direction of the rope 35), and through this hook 39, one end of the rope ladder 7 is connected to the cross member 11 (for example, the roof 3) of the main body ladder 5. Is attached to a cross member 11A) that is closest to the end 3A. The hook 39 is normally formed in a ring shape, and is not easily detached from the cross member 11 after being attached to the cross member 11, but a part of the ring portion is in relation to other parts. By swinging or the like, it becomes a “C” shape or the like, and can be attached to or removed from the cross member 11. The hook 39 is provided on each of the two ropes 35.

  The rope 35 may be a so-called rope that is described as a lanyard in the “Safety Belt Standard” of the Ministry of Health, Labor and Welfare Notification No. 38 of February 25, 2002, but is similarly described as a lanyard. It is good also as a strap (band-like thing or belt-like thing). Furthermore, the hook 39 can use a hook (a bowl-shaped instrument) or a carabiner (an annular instrument) in the same standard.

  The other end portion in the longitudinal direction of the rope ladder 7 is integrally provided with a plate-like holding member 41 (for example, a holding member made of aluminum, resin, or the like) straddling the two ropes 35. The other end portion in the longitudinal direction of the rope ladder 7 is fixed to the roof 3 by fixing 41 to the lower side of the edge of the end portion 3B of the roof 3 with a fastener such as a bolt. The shape of the cross member 37 is formed in, for example, a long quadrangular prism shape, and each side surface is subjected to anti-slip processing such as formation of minute irregularities.

Further, as shown in FIG. 3, one end of the rope 43 is fixed to a cross member (cross member of the rope ladder 7) 37A existing near the top 3C of the roof 3 through, for example, a hook or tied, In addition, the other end of the rope 43 whose one end is engaged with the cross member 37A is attached to the expansion / contraction adjuster 40 (having the same function as the rope expansion / contraction adjuster described in Utility Model Registration No. 3000178) or the hook 42. Accordingly, the worker P that is climbing on the roof 3 may be more reliably prevented from falling by being engaged with the safety belt 44 worn by the worker P or a harness (not shown).

  In addition, after the expansion / contraction adjuster 40 has passed the rope (reference numeral 16 in the utility model registration gazette) through the rope insertion holder (reference numeral 1 in the utility model registration gazette) as in utility model registration No. 30000178 and the like. , A shaft-attached two-bar triple link that constitutes a four-bar pivot link mechanism that receives a force from the hook when a load is applied to the hook (reference numeral 3 in the utility model registration gazette) for some reason (the utility model The rope pawl (reference numeral 9 in the utility model registration gazette) reliably presses the rope and regulates the movement of the expansion / contraction adjuster 40 with respect to the rope by the signs 4, 5, and 6) in the registration gazette. Further, in order to release this restricted state, the rope presser of the rope pawl is released by grasping the rope insertion holding body and the loose link (reference numeral 5 in the utility model registration gazette), and the expansion / contraction adjuster 40 is applied to the rope. It is possible to move.

  The expansion / contraction adjuster 40 is used as a fall prevention device when working at a high place, but the present inventors have used a part of the present invention as described below with a new idea (see FIG. 3). The present inventors have found that when snow is dropped on the roof 3, it is possible to work more safely and safely when snowing (throwing) snow with a shovel or snow dumper heavier than snow.

  First, the rope 43 is inserted into the expansion / contraction adjuster 40, and the position of the expansion / contraction adjuster 40 with respect to the rope 43 is adjusted so that the operator P can go down to snow in that state, and a load is applied to the hook of the expansion / contraction adjuster 40. As a locked state, the expansion / contraction adjuster 40 is fixed so as not to move. Next, the rope 43 is stretched, the snow on the roof 3 is scraped off with a scoop or a snow dumper, and the snow is lowered so as to be thrown out downward of the inclined roof 3. There are many accidents in which the operator P falls off the roof 3 with the momentum of swinging out a scoop etc. when the snow falls, but as described above, the movement of the telescopic adjuster 40 is restricted with respect to the rope, and the rope 43 is stretched. When the work P is engaged with the safety belt 44 or the harness (not shown) worn by the worker P so that the hook 42 of the expansion / contraction adjuster 40 is engaged, the worker P pulls in the direction of the top 3C of the roof 3. Since the snow is lowered while receiving such a force, the work can be performed without falling from the roof 3 and without feeling uneasy about falling down (see FIG. 3).

  According to the experiments by the inventors, when the snow was taken down with the rope 43 slackened or absent, the majority of subjects felt strongly anxious about falling or falling, but with the rope 43 stretched, the snow was lowered. The result shows that most of the subjects hardly feel anxiety about falling. In addition, when the snow-lowering operation proceeds so that the length of the rope 43 is lost or no longer needed, the extension adjuster 40 is released by the above-described method, and the extension adjuster 40 is attached to the rope 43. This is dealt with by moving it and applying a load to the hook of the expansion / contraction adjuster 40 again to lock the expansion / contraction adjuster 40 so that it does not move.

  Furthermore, if the movable position of the telescopic adjuster 40 on the rope 43 from the fixed position of the rope 43 is defined to be about 30 to 50 cm shorter than the straight line length from the top 3C to the end of the roof, the operator P should slip his foot by any chance. It will not fall from the roof 3 even if you let it go.

  Further, the rope ladder 7 and the main body ladder 5 of the fall prevention system 1 are installed, for example, before the snowy season comes, and are removed when the snowy season is over.

  Incidentally, a plurality of rope ladders 7 may be installed side by side in the longitudinal direction of the roof 3 (see FIG. 1; the extending direction of the ridgeline of the top 3C of the roof 3). In this case, the end portion of the rope ladder that is not engaged with the main body ladder 5 is fixed under the armpit of the end portion 3A of the roof 3 by using the same member as the holding member 41 as in the case shown in FIG. It is desirable that Further, the rope ladder 7 engaged with the main body ladder 5 is also fixed to the bottom of the end 3 </ b> A of the roof 3 using a member similar to the holding member 41 so as not to engage with the main body ladder 5. It may be.

  By the way, in the fall prevention system 1 shown in FIGS. 1 and 2, the width of the main body ladder 5 and the rope ladder 7 is approximately the same, but the width of the rope ladder 7 is made larger than the width of the main body ladder 5 as shown in FIG. 4. Also, it may be formed widely. Thus, by forming the width of the rope ladder 7 wide, the safe work range on the roof 3 can be expanded.

  Furthermore, the width of the rope ladder 7 (the length of the cross member 37) may be made wider (extended) than the state shown in FIG. That is, for example, it may be extended to the extent that it covers almost the entire roof 3. When the cross member 37 is extended in this way, the number of ropes may be three or more in order to increase the strength of the rope ladder 7.

  In the case where the number of ropes is three or more, it is not necessary to provide one cross member 37 extending over almost the entire width of the rope ladder 7, but as shown in FIG. A configuration in which the short cross members 37 extending between the ropes 35 are provided by shifting the positions in the extending direction of the ropes 35 may be used.

  Further, the shape of the cross member 37 of the rope ladder 7 may be formed in a long regular triangular prism shape (see FIG. 5B) instead of a long quadrangular prism shape (see FIG. 5A). As is clear from FIGS. 2 and 5, the rope 35 extends in an inverted “V” shape along the upper surface of the roof 3 when the rope ladder 7 is attached to the roof 3. When the cross member 37 is formed in a regular triangular prism shape, one of the three side surfaces of the cross member 37 is in contact with the upper surface of the roof 3, and the other one surface is A leg can be hung. Each side surface (three side surfaces) of the cross member 37 is subjected to anti-slip processing as described above.

  5 (a) and 5 (b), the cross member 37 is configured so that the rope 35 penetrates, but the cross member 37 moves so as to rotate and the stability is insufficient. When it seems, it is good to use the rope ladder 7 comprised so that the cross member 37 may be spread with the rope 35 like Fig.7 (a). In this case, the rope 35 can be the rope 35 described above, but it is preferable to use a belt-like strap 46 instead of the rope 35 so that the cross member 37 is in close contact with the roof 3 and stability is improved. (Refer FIG.7 (b)).

  Further, in the case shown in FIGS. 7A and 7B, the rope 35 and the strap 46 are in close contact with the three side surfaces (side surfaces other than the surface contacting the roof 3) of the square columnar cross member 37. As shown in FIG. 7C (viewed in the direction of arrow VII in FIGS. 7A and 7B), the rope 35 is provided only on the opposing surface of the roof 3 of the rectangular columnar cross member 37. And a strap 46 are provided in close contact with each other, and another short rope 36 or strap is brought into contact with the three side surfaces (surfaces other than the surface facing the roof 3) of the square columnar cross member 37. Both ends in the direction may be fixed to the rope 35 or the strap 46, and the cross member 37 may be sandwiched between the rope 35 or the strap 46 and the short rope 36 or the strap, and the cross member 37 may be fixed to the rope 35 or the strap 46. .

  Moreover, the structure which fixed the rope 35 and the strap 46 only to the side surface which opposes the roof 3 of the square columnar cross member 37, without using the short rope 36 or a short strap may be sufficient.

  Further, not only the rectangular columnar cross member 37 but also the triangular columnar cross member 37 shown in FIG. 5B, the configuration as shown in FIGS. 7C and 7D is adopted. Can do.

  According to the fall prevention system 1, the rope ladder 7 is installed on the roof 3, and an operator can put a foot on the cross member 37 of the rope ladder 7 to perform the work, so that the foot is not slipped and the snow is lowered. It is possible to ensure the safety of the worker when working.

  Since the rope ladder 7 is installed on the roof 3, the structure of the fall prevention system 1 is simple and inexpensive, and a ladder composed entirely of aluminum or the like is installed on the roof 3. The installation on the roof 3 is easier than in the case.

  Further, since the cross member 37 of the rope ladder 7 is made of a material having resistance such as aluminum, the foot is kept in a stable state without wobbling as compared with the case where the cross member 37 is made of a rope. The safety of work is further improved.

  Further, in the case where the cross member 37 is formed in the shape of an equilateral triangle column, if the slope of the roof 3 is 60 ° or less, the surface on which the operator puts a foot will be inclined in the direction opposite to the inclination of the roof 3. , The operator's feet become more difficult to slip. Moreover, since the cross member 37 is an equilateral triangular column shape, even if the cross member 37 exists on any inclined surface (one inclined surface or the other inclined surface with the top 3C of the roof 3 as a boundary), The surface on which the operator puts his foot is inclined in the direction opposite to the inclination of the roof 3, and the versatility of the rope ladder 7 is increased.

  Further, in the main body ladder 5, the vertical member 9 of the main body ladder 5 extends a predetermined length above the end 3A of the roof 3, so that when an operator moves from the main body ladder 5 to the roof 3, or When moving from the roof 3 to the main body ladder 5, it is possible to place the hand on the portion of the longitudinal member 9 extending upward, thereby preventing the operator from wobbling and improving safety. In particular, for example, when finishing the snow lowering operation and moving from the roof 3 to the main body ladder 5, the operator must change the direction of the body, but by placing a hand on the portion of the vertical member 9 extending upward, The direction can be changed, and the safety of the worker is improved.

  Moreover, since the stepladder 17 is formed in the main body ladder 5, the rope ladder 7 is determined by the weight of the worker when the worker moves to one side of the roof 3 (the slope on the left side in FIG. 2). Even if the main body ladder 5 is to be pulled or when the operator moves from the roof 3 to the main body ladder 5, the operator hangs his hands on the vertical member 9 extending above the main body ladder 5, and the main body Even if a moment is generated in the ladder 5, the stepladder 17 (auxiliary member 15) serves as a stick and can avoid the possibility of the main body ladder 5 falling down.

  Further, since the main body ladder 5 is engaged with the rope ladder 7, the main body ladder 5 leaning on the roof 3 is hard to fall down in a direction away from the roof 3, but the main body ladder 5 is integrated with the roof 3 by the gripping member 23. Therefore, the possibility of the main body ladder 5 leaning against the roof 3 falling down can be further avoided.

  In addition, an anchor installation part may be provided at the lower end of the main body ladder 5, and when the main body ladder 5 is leaned against the roof 3, the anchor installation part may be fixed to the ground GL using an anchor member.

[Second Embodiment]
FIG. 8 is a perspective view (illustration of the rope ladder 7 is omitted) showing a schematic configuration of a fall prevention system 1a for snow lowering work according to the second embodiment of the present invention.

  The fall prevention system 1a for snow lowering work according to the second embodiment of the present invention is different from the fall prevention system 1 according to the first embodiment in that the fall prevention system 1a includes a horizontal ladder 51. It is comprised substantially the same as the fall prevention system 1 which concerns on this embodiment, and there exists substantially the same effect.

  That is, the fall prevention system 1 a according to the second embodiment is configured to include the main body ladder 5, the rope ladder 7, and the horizontal ladder 51. The horizontal ladder 51 is provided on the main body ladder 5 on the other end side (upper side) of the main body ladder 5, and extends substantially horizontally on the upper side of the roof 3 when the main body ladder 5 is leaned against the end 3 </ b> A of the roof 3. It has become.

  As with the main ladder 5, the horizontal ladder 51 has a vertical member (vertical tree that extends in the horizontal direction when installed on the roof) 53 and a plurality of horizontal members 55 that serve as footholds between the vertical member 53. The vertical member 53 and the horizontal member 55 are made of a rigid material such as aluminum. Moreover, the vertical member 53 of the horizontal ladder 51 is formed shorter than the vertical member 9 of the main body ladder 5, for example.

  More specifically, each vertical member 53 of the horizontal ladder 51 is rotatably engaged with the vertical member 9 of the main body ladder 5 on the base end side of each vertical member 53. The portion of the vertical member 9 with which the vertical member 53 of the horizontal ladder 51 is engaged is located at a position away from the end 3A of the roof 3 by a predetermined distance when the main body ladder 5 is leaned against the roof 3. ing. In addition, the position of the part of the vertical member 9 with which the vertical member 53 of the horizontal ladder 51 is engaged is changed according to the form of the roof 3 so that the horizontal ladder 51 extends in the horizontal direction on the roof 3. Moreover, it may be configured to be adjustable.

Each vertical member 53 of the horizontal ladder 51 is provided with a handrail (handrail made of a rigid material such as aluminum) 56 over almost the entire length of the vertical member 53. Each vertical member 53 of the horizontal ladder 51 is provided with a support member 57 for supporting this weight when a person is placed on the horizontal ladder 51. The support member 57 is provided with a length adjusting member such as a jack bolt.

  Further, a frame 59 formed in a gate shape, for example, is integrally provided on the front end side of the horizontal ladder 51. When the main ladder 5 is leaned against the roof 3 and the horizontal ladder 51 is installed horizontally, the frame 59 is almost upright on the tip side of the horizontal ladder 51. Can pass upright.

Then, one end of the rope is engaged with a beam of the frame 59 (a portion located on the upper side of the frame 59) via, for example, a hook, and the other end of the rope whose one end is engaged with the frame 59. part of the telescopic adjuster engaged with the safety belt or harness human wears through, but it may also be configured to prevent the fall of a person climbing on the roof more reliably.

  According to the fall prevention system 1a, since the horizontal ladder 51 is provided, when an operator moves from the main body ladder 5 to the roof 3 or from the roof 3 to the main body ladder 5, the horizontal ladder 51 is placed on the horizontal ladder 51. It can be stopped once, and the operator can change his / her feelings, and the safety of the operator can be improved.

  In addition, in the fall prevention system 1a, you may delete the site | part extended above the roof 3 in the other end part side of the vertical member 9. FIG.

It is a perspective view showing a schematic structure of a fall prevention system for snow removal work concerning a 1st embodiment of the present invention. It is a side view which shows schematic structure of the fall prevention system for snow removal work, and is II arrow directional view in FIG. It is a figure which shows an example of the use condition of the fall prevention system for snow removal work. It is a figure which shows the modification of the fall prevention system for snow lowering work. It is a figure which shows the deformation | transformation of the fall prevention system for snow lowering work. It is a figure which shows the deformation | transformation of the fall prevention system for snow lowering work. It is a figure which shows the deformation | transformation of the fall prevention system for snow lowering work. It is a perspective view which shows schematic structure of the fall prevention system for snow lowering work which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

1 , 1 a Fall prevention system 3 Roof 5 Main body ladder 7 Rope ladder 51 Horizontal ladder

Claims (3)

A main ladder that rests against the roof;
A rope ladder installed on the roof, with one end in the longitudinal direction integrally installed on the main body ladder and the other end in the longitudinal direction fixed to the other end of the roof;
A fall prevention system for snow lowering work characterized by comprising: In the fall prevention system for snow lowering work of Claim 1,
A snow lowering operation comprising a horizontal ladder provided on the main body ladder on the other end side of the main body ladder and extending substantially horizontally on the upper side of the roof when the main body ladder is leaned against an end of the roof. Fall prevention system. In the fall prevention system for snow lowering work of Claim 1 or Claim 2,
A rope having one end fixed to the rope ladder;
A telescopic adjuster attached to the rope and capable of regulating movement relative to the rope;
A fall prevention system for snow lowering work, wherein the telescopic adjuster is configured to be engaged with an operator and perform snow removal with the rope stretched.

Images