JP2009091765A - Fall prevention device and fall prevention method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an energy amount that should be absorbed by a rope by reducing a height from which an object falls. <P>SOLUTION: This fall prevention device comprises: a first metal fitting 31; the lower side first passing part of a lower metal fitting 35 which is secured to a sign post 14 and allowing a first linear part 20d continuous to one end thereof fixed to the first metal fitting 31 to be inserted therethrough; a fixed side first passing part of a second metal fitting 32 allowing a second linear part 20e continuous to the first linear part 20d to be inserted therethrough; an upper side metal fitting 36 which is secured to the sign post 14 at the further upper side than the lower side metal fitting 35 and allowing a third linear part 20f continuous to the second linear part 20e to be inserted therethrough; a fixed side second passing part of the first metal fitting 31 allowing a fourth linear part 20g continuous to the third linear part 20f to be inserted therethrough; a lower side second passing part of the lower metal fitting 35 allowing a fifth linear part 20h continuous to the fourth linear part 20g to be inserted therethrough; and the second fixing part of the second metal fitting 32 capable of fixing one end of a wire rope 20 continuous to the fifth linear part 20h. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fall prevention device and a fall prevention method for preventing an object installed on a fixed body from falling or falling over.

Conventionally, as disclosed in Patent Documents 1 and 2 below, a fall prevention device for preventing incidental equipment such as a sound insulation wall, a sign, and an illumination lamp installed on an expressway from falling is known. . Specifically, in this fall prevention device, as shown in FIG. 9, a rope body 91 such as a wire rope is used, and a first fixing portion 93 for fixing one end portion of the rope body 91 is provided in the rail 92. On the other hand, a second fixing portion 95 for fixing the other end portion of the cable body 91 is provided on the pillar 94 of the marker pillar. Since the column 94 extends upward from the rail 92, the column-side second fixing unit 95 is disposed above the rail-side first fixing unit 93. And in this fall prevention apparatus, when a marker pillar falls by the collision of a vehicle, an earthquake, and destruction fatigue, it prevents fall by the rope 91, but it is short by using the multiple ropes 91 from which length differs. The amount of energy absorption is increased by breaking the cable body 91 in order.
JP 2004-278256 A JP 2007-146626 A

  However, in the conventional fall prevention device, the second fixing portion 95 on the support column side is disposed above the first fixing portion 93 on the railing side, and the cords 91 are fixed in a stretched state. Therefore, when the marker column falls, the marker column falls with the cable body 91 in a loose state, and further falls until the cable body 91 is in a state of hanging the marker column. The drop height until the load is applied to 91 becomes longer. As a result, there is a problem that the amount of energy loaded on the cable body 91 is increased accordingly.

  Therefore, the present invention has been made in view of such a point, and an object of the present invention is to reduce the amount of energy that the cord body should absorb by reducing the fall height of the object. There is.

  In order to achieve the above object, the present invention is an apparatus for preventing an object mounted on a fixed body from falling or falling by the cable body 20, which is fixed to the fixed body, and the cable body 20 A first fixing portion 31b capable of fixing one end portion of the cable body, and a first linear portion 20d which is fixed to the object and is continuous with the one end portion fixed to the first fixing portion 31b of the cord body 20. A lower first passage portion 35b that is fixed to the fixed body, and a fixed first passage portion 32b that is inserted through the second linear portion 20e that is continuous with the first linear portion 20d of the cord body 20 An upper first passage portion that is fixed to the object above the lower first passage portion 35b and that passes through the third linear portion 20f that is continuous with the second linear portion 20e of the cord body 20. 36b and fixed to the fixed body, A fixed-side second passage portion 31b through which the fourth linear portion 20g continuous with the three-wire portion 20f is inserted, and fixed to the object at the same height position as the lower first passage portion 35b; 20, the lower second passage portion 35b for inserting the fifth linear portion 20h continuous with the fourth linear portion 20g, and the cord which is fixed to the fixed body and continues to the fifth linear portion 20h. A second fixing portion 32b capable of fixing the other end portion of the body 20, and the lower first passage portion 35b and the lower second passage portion 35b, when the object falls or falls, The fall prevention device is fixed to the object in such a positional relationship that the first linear portion 20d and the fifth linear portion 20h are pulled.

  In the present invention, when the target object falls from the fixed body or when the target object falls, the lower first passing part 35b and the lower second passing part 35b fixed to the target object pull the cord body 20. At this time, the first linear portion 20d inserted through the lower first passage portion 35b receives a tensile force, and the fifth linear portion 20h inserted through the lower second passage portion 35b receives a tensile force. However, the first linear portion 20d is a portion continuing to one end of the cord body 20 fixed to the first fixing portion 31b, and the fifth linear portion 20h is the cord body 20 fixed to the second fixing portion 32b. Therefore, the first linear portion 20d and the fifth linear portion 20h receive a tensile force without loosening. Further, since the cable body 20 is inserted into the fixed-side passage portions 31b and 32b and is not fixed to the fixed-side passage portions 31b and 32b, the first linear portion 20d is pulled when falling or falling. Thus, the second linear portion 20e and the third linear portion 20f are pulled, while the fourth linear portion 20g and the third linear portion 20f are pulled by pulling the fifth linear portion 20h. For this reason, at the time of dropping or falling, a pulling force acts on any linear portion of the rope body 20, whereby the fall height or the fall distance of the object can be reduced. The falling energy received by the cable can be reduced, and the cable body 20 having a small diameter can be used. Furthermore, the cable body 20 is inserted into any of the lower first passage portion 35b, the fixed first passage portion 32b, the upper first passage portion 36b, the fixed second passage portion 31b, and the lower second passage portion 35b. As a result, the length of the entire cord is long. For this reason, the amount of distortion of the entire cord body is reduced, and in this respect as well, it is possible to use the cord body 20 having a small diameter. Furthermore, when the target object falls from the fixed body or when the target object falls, the target object is suspended by the cable body 20 at two upper and lower portions, ie, the upper passage portion 36b and the lower passage portion 35b. In addition, since the cable body 20 obstructs the rotation of the object, the object can be prevented from rotating when it falls or falls. Thereby, safety can be improved.

  Here, the lower first passage portion 35b and the lower second passage portion 35b are placed on the object so as to have a height position equal to or lower than that of the first fixing portion 31b and the second fixing portion 32b. It is preferably fixed.

  In this aspect, the first linear portion 20d and the fifth linear portion 20h of the cable body 20 are surely pulled without loosening when the object falls or falls. Thereby, the fall height or fall distance of a target object can be shortened reliably, and the fall energy which the cable body 20 receives can be reduced more.

  The upper first passage portion 36b is preferably fixed to the object so as to be higher than the first fixing portion 31b and the second fixing portion 32b.

  In this aspect, the length of the cable body 20 to be routed can be made longer.

  Further, the fixed side first passage portion 32b and the fixed side second passage portion 31b are arranged to be opposite to each other with the passage portions 35b and 36b fixed to the object. preferable.

  In this aspect, it is possible to effectively prevent the object from rotating when the object falls or falls.

  Moreover, it is preferable that the said lower 1st passage part 35b and the said lower 2nd passage part 35b are provided in the common metal fitting.

  In this aspect, not only the number of parts can be reduced, but also the number of construction steps of the fall prevention device can be reduced.

  The first fixing unit 31b and the fixed-side second passage portion 31b are provided in a common metal fitting 31, and the second fixing portion 32b and the fixed-side first passage portion 32b are provided in a common metal fitting 32. Is preferably provided.

  In this aspect, not only the number of parts can be reduced, but also the number of construction steps of the fall prevention device can be reduced.

  The present invention is an apparatus for preventing an object installed on a fixed body from dropping or falling by means of the cable bodies 55 and 57, and is fixed to the fixed body, and fixes one end portion of the first cable body 55. A first fixing portion 31b that is possible, and a lower side that is fixed to the object and that passes through a first linear portion 55d that is continuous with one end portion of the first cable body 55 that is fixed to the first fixing portion 31b. A first passage portion 35b, a fixed first passage portion 32b that is fixed to the fixed body, and that allows the second linear portion 55e of the first cable body 55 to be continuous with the first linear portion 55d to be inserted; An upper first fixing portion 59b that is fixed to the object above the lower first passage portion 35b and can fix the other end portion of the first cable body 55 that is continuous with the second linear portion 55e. And one end of the second cable body 57 at substantially the same height as the first fixing portion 31b. A second fixing portion 32b that can be worn and a first linear portion 57d that is fixed to the object and that is continuous with one end of the second cable body 57 fixed to the second fixing portion 32b. A side second passage portion 35b, and a fixed side second passage portion 31b that is fixed to the stationary body and that allows the second linear portion 57e of the second cable body 57 to be continuous with the first linear portion 57d to be inserted. The upper second fixing portion fixed to the object above the lower second passage portion 35b and capable of fixing the other end portion of the second cable body 57 continuous with the second linear portion 57e. 59b, and the lower first passage portion 35b and the lower second passage portion 35b are arranged such that when the object falls or falls, the first linear portion 55d of the first cord body 55 and The object is in such a positional relationship that the first linear portion 57d of the second cord 57 is pulled. An anti-fall device being fixed.

  In the present invention, when the target object falls from the fixed body or when the target object falls, the lower first passing part 35b fixed to the target object pulls the first cord body 55, and the lower second passing part. 35b pulls the second cord 57. At this time, the first linear portion 55d of the first rope body 55 inserted through the lower first passage portion 35b receives a tensile force, and the second rope body 57 inserted through the lower second passage portion 35b. The first linear portion 57d receives a tensile force, but the first linear portion 55d of the first cable body 55 is a portion continuous to one end portion of the first cable body 55 fixed to the first fixing portion 31b. Since the first linear portion 57d of the second cable body 57 is a portion continuous to one end portion of the second cable body 57 fixed to the second fixing section 32b, the first linear sections 55d and 57d are loosened. Without pulling force without. Further, since the first cable body 55 and the second cable body 57 are inserted through the fixed-side passage portions 32b and 31b and are not fixed to the fixed-side passage portions 32b and 31b, the first rope body 55 and the second rope body 57 are not fixed to the fixed-side passage portions 32b and 31b. The second linear portion 55e is pulled by pulling the first linear portion 55d in the cord 55, while the second linear portion 57e is pulled by pulling the first linear portion 57d in the second cord 57. Be pulled. For this reason, at the time of falling or falling, a pulling force acts on any linear part of each cord body, so that the falling height or the tipping distance of the object can be reduced. The falling energy received by the can be reduced, and a cord having a small diameter can be used. Further, the first cord body 55 is inserted into the lower first passage portion 35b and the fixed side first passage portion 32b and then fixed to the upper first fixing portion 59b. Since the second passage portion 35b and the fixed second passage portion 31b are inserted into the upper second fixing portion 59b, the length of the entire cord body is increased. For this reason, the amount of distortion of the entire cord body is reduced, and in this respect as well, it is possible to use a cord having a small diameter. Furthermore, when the target object falls from the fixed body or when the target object falls, the target object is suspended by the rope body at two upper and lower portions, ie, the upper passage portion 59b and the lower passage portion 35b. In addition, since the cable body obstructs the rotation of the object, it is possible to prevent the object from rotating when it falls or falls. Thereby, safety can be improved.

  The present invention is a method for preventing the object installed on the fixed body from dropping or falling by the cable body 20, wherein the cable body 20 having one end fixed to the fixed body is fixed to the object. The lower first passage portion 35b, the fixed first passage portion 32b fixed to the fixed body, the upper first passage portion 36b fixed to the object above the lower first passage portion 35b, and the fixed By sequentially inserting the fixed side second passage 31b fixed to the body and the lower second passage 35b fixed to the object, and fixing the other end of the cord body 20 to the fixed body, This is a fall prevention method for preventing an object from falling or falling.

  The present invention is a method for preventing an object installed on a fixed body from falling or falling by means of the cable bodies 55 and 57, wherein the first cable body 55 having one end fixed to the fixed body is targeted. The lower first passage portion 35b fixed to the object and the fixed first passage portion 32b fixed to the fixed body are sequentially inserted, and the first object is inserted into the object above the lower first passage portion 35b. While fixing the other end portion of the rope body 55, the second rope body 57 having one end portion fixed to the fixed body, the lower second passage portion 35b fixed to the object, and the fixed side fixed to the fixed body. By sequentially inserting the second passage portion 31b and fixing the other end portion of the second cable body 57 to the object above the lower second passage portion 35b, the object falls or falls. This is a fall prevention method for preventing this.

  As described above, according to the present invention, it is possible to reduce the drop height of the object, and thereby reduce the amount of energy that the rope body should absorb.

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

(Embodiment 1)
As shown in FIGS. 1 and 2, the fall prevention device 10 according to the first embodiment prevents a sign post 14 installed on a rail 12 (or road side wall) as an example of a fixed body from falling or falling. Is to do. The marker column 14 is an example of an object that prevents falling or falling.

  The sign post 14 has a structure in which a vertically long support 14a is provided, and a sign (not shown) is fixed to the upper part of the support 14a. The balustrade 12 has a predetermined height, and fixing brackets 16 and 17 are provided on the balustrade 12 to fix the marker pillars 14 at two upper and lower portions.

  The fall prevention device 10 according to the first embodiment includes a wire rope 20 as an example of a cable body. As shown in FIG. 3, the wire rope 20 has a rope main body 20a and terminal portions 20b and 20c provided at both ends of the rope main body 20a. The rope body 20a is coated with, for example, nylon. The terminal portions 20b and 20c are larger in diameter than the rope body 20a. For this reason, the wire rope 20 can be fixed by the terminal portions 20b and 20c. The terminal portions 20b and 20c are not limited to the configuration that enables fixing by expanding the diameter of the rope main body 20a.

  The fall prevention device 10 includes a first fixed body side metal fitting (hereinafter simply referred to as a first metal fitting) 31 configured to be fixable to the balustrade 12 and a second fixed body side metal fitting (hereinafter simply referred to as a first metal fitting) configured to be fixable to the rail 12 2 metal fittings) 32, a lower metal fitting 35 that can be fixed to the marker column 14, and an upper metal fitting 36 that can be fixed to the marker column 14.

  As shown in enlarged views in FIGS. 4A to 4C, the first metal fitting 31 is configured by an angle member having an L-shaped cross section, and extends in a substantially horizontal direction along the side surface of the rail 12. It has the vertical part 31a arrange | positioned, and the horizontal part 31b extended to the side from the lower end part of this vertical part 31a. A plurality of through holes 38 are formed in the vertical portion 31 a, and bolts 39 for fastening the first metal fitting 31 and the rail 12 can be inserted into the through holes 38.

  An insertion hole 40 and a fixing hole 42 are formed in the horizontal portion 31b. The insertion hole 40 is a through-hole formed in a size that allows insertion of both the rope main body 20a and the terminal portions 20b and 20c of the wire rope 20. The fixing hole 42 includes an insertion portion 42a formed in the same size as the insertion hole 40, and a fixing portion 42b through which the rope body 20a can be inserted but the terminal portions 20b and 20c cannot be inserted. When fixing the wire rope 20 to the first metal fitting 31, first, one end portion 20b of the wire rope 20 is inserted into the insertion portion 42a, and when the rope body 20a is inserted into the insertion portion 42a, the wire rope 20 moves to the fixing portion 42b. To do. Then, a closing member 44 is attached to the insertion portion 42a so that the rope body 20a in the fixing portion 42b does not move to the insertion portion 42a. The closing member 44 is constituted by a bolt and nut in this example. As a result, the one end 20 b of the wire rope 20 is fixed to the first metal fitting 31.

  The second metal fitting 32 has the same configuration as the first metal fitting 31 in that it is made of an angle member having a vertical portion 32a and a horizontal portion 32b. However, the insertion hole and the fixing hole are different in the horizontal portion 32b. This is different from the configuration of the first metal fitting 31. As shown in FIG. 1, the first metal fitting 31 and the second metal fitting 32 are symmetric when viewed from the front, and the other end portion 20 c of the wire rope 20 is fixed to the second metal fitting 32. .

  The first metal fitting 31 and the second metal fitting 32 are arranged so as to be opposite to each other with the support column 14a interposed therebetween, and are fixed to the handrail 12 at substantially the same height.

  As shown in FIGS. 5A and 5B, the lower metal fitting 35 is configured to be attachable to the column 14a of the marker column 14, and a pair of component brackets so that the column 14a can be sandwiched. It is constituted by. Each component fitting includes a curved portion 35a that is curved into a shape corresponding to the outer diameter of the support column 14a, and flange portions 35b that are formed on both sides of the curved portion 35a. The flange portion 35b is formed with a bolt insertion hole 35c through which the bolt 46 can be inserted as a fastening body. By screwing a nut 47 into the bolt 46 inserted into the bolt insertion hole 35c, the lower metal fitting is inserted. 35 can be fixed to the column 14a.

  An insertion hole 35 d through which the wire rope 20 can be inserted is formed in the flange portion 35 b of the lower metal fitting 35. One insertion hole 35d is provided on each side of the curved portion 35a. Each insertion hole 35d is formed to a size that allows the end portions 20b and 20c of the wire rope 20 to be inserted, and the edge of the insertion hole 35d is chamfered.

  Similar to the lower metal fitting 35, the upper metal fitting 36 has a curved portion 36a and a flange portion 36b, and a bolt insertion hole (not shown) and an insertion hole 36d are formed in the flange portion 36b. Is different from the lower metal fitting 35 in that only one is formed. In other words, the lower metal fitting 35 is obtained by forming another insertion hole in the upper metal fitting 36.

  The upper metal fitting 36 is fixed to the column 14 a at a position above the top end 12 a of the rail 12. In other words, the upper metal fitting 36 is disposed above the first metal fitting 31 and the second metal fitting 32. On the other hand, the lower metal fitting 35 is fixed to the column 14 a at a position below the top end 12 a of the rail 12 and is arranged below the first metal fitting 31 and the second metal fitting 32.

  Here, a method of extending the wire rope 20 to the first metal fitting 31, the second metal fitting 32, the upper metal fitting 36, and the lower metal fitting 35 will be described. First, one end portion (one end portion) 20 b of the wire rope 20 is fixed to the first metal fitting 31. Specifically, the wire rope 20 is inserted into the insertion portion 42a in the fixing hole 42 of the lateral portion 31b of the first metal fitting 31, and the terminal portion 20b is engaged with the fixing portion 42b in a state of being positioned above the lateral portion 31b. Let Then, the closing member 44 is attached to the insertion portion 42a to prevent the terminal portion 20b from coming off. As a result, the one end portion 20 b of the wire rope 20 is fixed to the lateral portion 31 b of the first metal fitting 31. In other words, the lateral part 31b of the first metal fitting 31 is the first fixing part.

  Next, the other end portion (the other end portion) 20 c of the wire rope 20 is inserted into the insertion hole 35 d of the lower metal fitting 35, and then inserted into the insertion hole of the second metal fitting 32. Of the wire rope 20, a portion including a portion inserted into the insertion hole 35 d of the lower metal fitting 35 is the first linear portion 20 d, and the flange portion 35 b of the lower metal fitting 35 having the insertion hole 35 d is formed on the lower side. 1 passage part. Further, in the wire rope 20, a portion that is continuous with the first linear portion 20 d and includes a portion that is inserted into the insertion hole of the second metal fitting 32 is the second linear portion 20 e, and a second portion that has this insertion hole. The horizontal part 32b of the metal fitting 32 is a fixed side first passing part.

  The other end portion 20 c of the wire rope 20 is inserted into the insertion hole 36 d of the upper metal fitting 36 after being inserted into the insertion hole of the second metal fitting 32, and then inserted into the insertion hole 40 of the first metal fitting 31. A portion of the wire rope 20 that is continuous with the second linear portion 20e and includes a portion inserted into the insertion hole 36d of the upper metal fitting 36 is the third linear portion 20f, and the upper metal fitting 36 having the insertion hole 36d. The flange portion 36b is an upper first passage portion. Further, in the wire rope 20, a portion including the portion that is continuous with the third linear portion 20 f and is inserted into the insertion hole 40 of the first metal fitting 31 is the fourth linear portion 20 g, and has the insertion hole 40. The horizontal part 31b of the first metal fitting 31 is a fixed-side second passage part. That is, the fixed-side second passage portion is provided in a metal fitting (first metal fitting 31) common to the first fixing unit.

  Further, the other end 20 c of the wire rope 20 is inserted into another insertion hole 35 d of the lower metal fitting 35 and then fixed to the fixing hole of the second metal fitting 32. A portion of the wire rope 20 that is continuous with the fourth linear portion 20g and includes a portion inserted into the insertion hole 35d of the lower metal fitting 35 is the fifth linear portion 20h, and the lower side having the insertion hole 35d. The flange portion 35b of the metal fitting 35 is a lower second passage portion. That is, the lower first passage portion and the lower second passage portion are provided on a common metal fitting (lower metal fitting 35).

  In the second metal fitting 32, after the other end portion 20c of the wire rope 20 is inserted into the insertion portion of the fixing hole, the rope main body 20a is moved to the fixing portion and the closing member 44 is attached to the other end of the wire rope 20. The portion 20 c is fixed to the lateral portion 32 b of the second metal fitting 32. In other words, the lateral portion 32b of the second metal fitting 32 is a second fixing portion, and the second fixing portion and the fixed-side first passage portion are provided on a common metal fitting (second metal fitting 32). become. The other end portion 20c of the wire rope 20 is connected to the fifth linear portion 20h.

In this way, the fall prevention device 10 to which the wire rope 20 is fixed is described. The strength required for the wire rope 20 stretched in this way will be briefly described. If the weight of the object (marker column 14) is W and the distance of the drop is s, the drop energy is W · s. The rope tension of the wire rope 20 is P, the drop height is h, and the rope elongation at that time is ΔL. When the fall energy is absorbed by the strain of the wire rope 20, the following relational expressions (1) and (2)
W · s = (1/2) · P · ΔL (1)
W · (h + ΔL) = (1/2) · P · ΔL (2)
Is established.

If the rope elastic modulus is E, the rope length is L, and the rope cross-sectional area is A,
ΔL = (P · L) / (E · A) (3)
The following relational expression (3) holds. From the expressions (2) and (3), the following relational expression (4) can be derived.

  From this relational expression (4), the rope tension P can be calculated, and the safety factor can be obtained from the rope tension P and the breaking load of the wire rope 20.

  In the present embodiment, the lower metal fitting 35 fixed to the marker column 14 pulls the wire rope 20 when the marker column 14 falls from the rail 12 or when the marker column 14 falls. At this time, the first linear portion 20d inserted through the flange portion 35b of the lower metal fitting 35 receives a tensile force, and the fifth linear portion 20h inserted through the flange portion 35b of the lower metal fitting 35 receives a tensile force. However, the first linear portion 20d is a portion continuous to one end portion 20b of the wire rope 20 fixed to the first metal fitting 31, and the fifth linear portion 20h is a wire rope fixed to the second metal fitting 32. Since it is a site | part continuous to the other end part 20c of 20, these 1st linear parts 20d and the 5th linear part 20h receive tensile force, without loosening. Further, since the wire rope 20 is inserted into the insertion hole 40 of the first metal fitting 31 and the second metal fitting 32 and is not fixed to the insertion hole 40, the first linear portion 20d is not dropped or falls. The second linear portion 20e and the third linear portion 20f are pulled by being pulled, while the fourth linear portion 20g and the third linear portion 20f are pulled by being pulled by the fifth linear portion 20h. For this reason, when falling or falling, the pulling force acts on any of the linear portions 20d to 20h of the wire rope 20, so that when the marker column 14 falls or falls, the wire rope 20 is loosened. The falling height or the falling distance of the sign post 14 can be reduced, so that the falling energy received by the wire rope 20 can be reduced, and the wire rope 20 having a small diameter is used. It becomes possible. Furthermore, since the wire rope 20 is inserted into any of the lower first passage, the fixed first passage, the upper first passage, the fixed second passage, and the lower second passage, The overall length of the wire rope 20 is increased. For this reason, the distortion amount of the wire rope 20 as a whole is reduced, and it is possible to use a wire rope 20 having a small diameter also in this respect. Furthermore, when the marker column 14 falls from the rail 12 or when the marker column 14 falls, the marker column 14 is suspended by the wire rope 20 at the upper and lower portions of the upper bracket 36 and the lower bracket 35. In addition, since the wire rope 20 obstructs the sign pillar 14 from rotating, it is possible to prevent the sign pillar 14 from rotating when it falls or falls. Thereby, safety can be improved.

  Further, in the first embodiment, since the lower metal fitting 35 is disposed below the first metal fitting 31 and the second metal fitting 32, the first wire rope 20 of the wire rope 20 is dropped when the sign post 14 falls or falls. The linear portion 20d and the fifth linear portion 20h are reliably pulled without loosening. Thereby, the fall height or fall distance of the marker pillar 14 can be shortened reliably, and the fall energy which the wire rope 20 receives can be reduced more.

  Moreover, in this Embodiment 1, since the upper metal fitting 36 is arrange | positioned so that it may be located above the 1st metal fitting 31 and the 2nd metal fitting 32, the length of the wired wire rope 20 is made longer. Can do.

  In the first embodiment, the first metal fitting 31 and the second metal fitting 32 are arranged so as to be opposite to each other (on the left and right sides) with the support post 14a interposed therebetween. It is possible to effectively prevent the column 14 from rotating.

  In the first embodiment, the lower first passage portion and the lower second passage portion are provided in a common metal fitting (lower metal fitting 35), so that not only the number of parts can be reduced, The number of construction steps of the fall prevention device 10 can be reduced.

  In the first embodiment, since the second fixing portion and the fixed-side first passage portion are provided in a common metal fitting (second metal fitting 32), not only the number of parts can be reduced, but also the drop. The number of construction steps for the prevention device 10 can be reduced.

  In this embodiment, the example in which the one end 20b of the wire rope 20 is fixed to the first metal fitting 31 and the other end 20c is fixed to the second metal fitting 32 has been described. The other end 20c may be fixed to the first metal fitting 31 by fixing to the second metal fitting 32.

(Embodiment 2)
FIG. 6 shows a second embodiment of the present invention. 2nd Embodiment is for preventing the fall or fall of the marker pillar 14 installed in the top end 12a of the balustrade 12 (or road side wall). Although specifically described below, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, the lower metal fitting 35 is not used, and the lower first passage portion and the lower second passage portion are provided on the support portion 50 that fixes the column 14 a of the marker column 14 to the rail 12. ing. The support portion 50 is provided at the lower end portion of the column 14a, and includes a horizontal plate portion 50a fixed to the top end 12a of the rail 12 and a vertical plate portion 50b rising upward from the horizontal plate portion 50a. As shown in FIG. 7 (a), two insertion holes 50c are formed in the vertical plate portion 50b, and the respective insertion holes 50c are arranged separately on both sides of the support column 14a. That is, the lower first passage portion through which the first linear portion 20d of the wire rope 20 is inserted and the lower second passage portion through which the fifth linear portion 20h of the wire rope 20 passes are formed by the vertical plate portion 50b. It is configured.

  As shown in FIG. 7B, the first metal fitting 31 has an insertion hole 40 and a fixing hole 42 in the vertical portion 31a. Further, the second metal fitting 32 has the same configuration as the first metal fitting 31.

  In the present embodiment, since all of the first metal fitting 31, the second metal fitting 32, and the support portion 50 are fixed to the top end 12a of the rail 12, the first metal fitting 31, the second metal fitting 32, and the support portion 50 are Are arranged at substantially the same height. In the second embodiment, unlike the first embodiment in which the wire rope 20 is routed in a substantially square shape as shown in FIG. 1, the wire rope 20 is routed in a substantially triangular shape.

  Also in the second embodiment, as in the first embodiment, the drop height or the fall of the marker column 14 is caused by a pulling force acting on any of the linear portions 20d to 20h of the wire rope 20 at the time of dropping or falling. The distance can be reduced. Thereby, the fall energy which the wire rope 20 receives can be reduced, and it becomes possible to use a thing with a small diameter as the wire rope 20.

  Other configurations, operations, and effects are the same as those in the first embodiment although the description thereof is omitted.

(Embodiment 3)
FIG. 8 shows a third embodiment of the present invention. In the third embodiment, two wire ropes 55 and 57 are used. Although specifically described below, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In 3rd Embodiment, the 1st wire rope 55 as a 1st rope and the 2nd wire rope 57 as a 2nd rope are used. These wire ropes 55 and 57 are substantially half the length of the wire rope 20 of the first embodiment.

  The lower metal fitting 35 and the upper fixing metal fitting 59 are fixed to the column 14a. The lower metal fitting 35 is the same as the lower metal fitting 35 of the first embodiment. The upper fixing bracket 59 has a curved portion 59a and a flange portion 59b in which two fixing holes are formed. The fixing hole has the same configuration as the fixing hole 42 of the first metal fitting 31 and includes an insertion portion and a fixing portion.

  The first wire rope 55 has one end 55 a fixed to the first metal fitting 31, and the other end 55 b inserted through the lower metal fitting 35 and the second metal fitting 32 in this order, and then fixed to the upper fixing metal 59. Is done. That is, the flange portion 35 b of the lower metal fitting 35 constitutes a lower first passage portion, and the lateral portion 32 b of the second metal fitting 32 constitutes a fixed first passage portion. In addition, the first fixing unit is configured by the lateral portion 31 b of the first metal fitting 31, and the upper first fixing unit is configured by the flange portion 59 b of the upper fixing metal fitting 59. A portion of the first wire rope 55 including a portion inserted through the lower metal fitting 35 becomes the first linear portion 55d, a portion including the portion inserted through the second metal fitting 32, which is continuous with the first linear portion 55d. Becomes the second linear portion 55e.

  One end 57 a of the second wire rope 57 is fixed to the second metal fitting 32, and the other end 57 b is inserted into the lower metal fitting 35 and the first metal fitting 31 in this order, and then fixed to the upper fixing metal 59. Is done. That is, the flange portion 35 b of the lower metal fitting 35 constitutes a lower second passage portion, and the lateral portion 31 b of the first metal fitting 31 constitutes a fixed second passage portion. Further, the second fixing portion is configured by the lateral portion 32 b of the second metal fitting 32, and the upper second fixing portion is configured by the flange portion 59 b of the upper fixing metal fitting 59. A portion of the first wire rope 55 including a portion inserted through the lower metal fitting 35 becomes a first linear portion 57d, a portion including the portion inserted through the first metal fitting 31 that is continuous with the first linear portion 57d. Becomes the second linear portion 57e.

  The fixing portion to the upper fixing bracket 59 shows an example in which the first wire rope 55 is on the back side with respect to the support 14a and the second wire rope 57 is on the front side with respect to the support 14a. The reverse is also possible.

  In the present embodiment, when the marker column 14 falls from the fixed body or when the marker column 14 falls, the lower metal fitting 35 fixed to the marker column 14 pulls the first wire rope 55 and the second wire rope 57. . At this time, the first linear portion 55d of the first wire rope 55 inserted through the lower metal fitting 35 and the first linear portion 57d of the second wire rope 57 receive a tensile force. The first linear portion 55 d is a portion continuous with one end portion 55 a of the first wire rope 55 fixed to the first metal fitting 31, and the first linear portion 57 d of the second wire rope 57 is fixed to the second metal fitting 32. Since the second wire rope 57 is continuous with the one end portion 57a of the second wire rope 57, the first linear portions 55d and 57d do not loosen and are easily subjected to a tensile force. In addition, since the wire ropes 55 and 57 are inserted into the insertion holes 40 of the first metal fitting 31 and the second metal fitting 32 and are not fixed to the insertion holes 40, the first linear portion at the time of dropping or overturning By pulling 55d and 57d, the second linear portions 55e and 57e are pulled. For this reason, at the time of dropping or overturning, the pulling force acts on any linear part of the wire ropes 55, 57, so that the falling height or the overturning distance of the sign post 14 can be reduced. The drop energy received by the wire ropes 55 and 57 can be reduced, and the wire ropes 55 and 57 having a small diameter can be used. Further, the first wire rope 55 is inserted into the lower first passage and the fixed first passage and then fixed to the upper first fixing portion, and the second wire rope 57 is connected to the lower second passage. And since it is fixed by the upper side 2nd fixing | fixed part after being inserted in the fixed side 2nd passage part, the length as the whole wire rope is long. For this reason, the amount of distortion of the entire wire rope is reduced, and in this respect as well, a wire rope having a small diameter can be used. Furthermore, when the sign post 14 falls from the railing 12 or when the sign post 14 falls, the sign post 14 is suspended by the wire ropes 55 and 57 at two upper and lower portions, ie, the upper passage portion and the lower passage portion. In addition, since both wire ropes 55 and 57 obstruct the rotation of the sign post 14, the sign post 14 can be prevented from rotating when it falls or falls. it can. Thereby, safety can be improved.

  Other configurations, operations, and effects are the same as those in the first embodiment although the description thereof is omitted.

(Other embodiments)
Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, in each embodiment, the marker pillar 14 is taken as an example of the object, but the present invention is not limited to this. For example, it is good also as a fall prevention device which used road incidental facilities, such as an illumination light and a guide board, as a target object.

  In each of the embodiments described above, the end portion of the wire rope has a diameter larger than that of the rope main body and is fixed to the first metal fitting 31 or the like. However, the fixing method is not limited to this, and various known fixing methods can be used. The law can be adopted. For example, the terminal portion may be formed in an annular shape that can be clamped.

  In each said embodiment, the flange part 35b of the lower metal fitting 35 which comprises a lower 1st passage part, and the flange part 35b of the lower metal fitting 35 which comprises a lower 2nd passage part were comprised with the common metal fitting. However, the present invention is not limited to this, and may be configured with a separate metal fitting. Moreover, although the horizontal part 31b of the 1st metal fitting 31 which comprises a 1st fixing | fixed part and the horizontal part 31b of the 1st metal fitting 31 which comprises a fixed side 2nd passage part were comprised by the common metal fitting, it is not restricted to this. Alternatively, it may be constituted by a separate metal fitting. Moreover, although the horizontal part 32b of the 2nd metal fitting 32 which comprises a 2nd fixing | fixed part and the horizontal part 32b of the 2nd metal fitting 32 which comprises a fixed side 1st passage part were comprised by the common metal fitting, it is not restricted to this. Alternatively, it may be constituted by a separate metal fitting.

It is a front view showing the whole fall prevention device composition concerning a 1st embodiment of the present invention. It is a side view of the fall prevention device. It is a front view of the wire rope used for the said fall prevention apparatus. (A)-(c) It is a top view, a side view, and a front view of the 1st metal fitting used for the said fall prevention apparatus. (A) (b) It is the front view and upper surface figure of a lower side metal fitting used for the said fall prevention apparatus. It is a front view which shows the whole structure of the fall prevention apparatus which concerns on 2nd Embodiment of this invention. (A) It is the side view seen from the VIIa-VIIa line | wire of FIG. 6, (b) It is the side view seen from the VIIb-VIIb line | wire of FIG. It is a front view which shows the whole structure of the fall prevention apparatus which concerns on 3rd Embodiment of this invention. It is a figure which shows the conventional fall prevention apparatus.

Explanation of symbols

12 handrail 12a top 14 signpost 14a strut 20 wire rope (cord)
20b One end portion 20c The other end portion 20d First linear portion 20e Second linear portion 20f Third linear portion 20g Fourth linear portion 20h Fifth linear portion 31 First bracket 31b Horizontal portion 32 Second bracket 32b Horizontal Part 35 Lower metal fitting 35b Flange part 35d Insertion hole 36 Upper metal fitting 36b Flange part 36d Insertion hole 40 Insertion hole 42 Fixing hole 42a Insertion part 42b Fixing part 50 Support part 50b Vertical plate part 50c Insertion hole 55 First wire rope (first wire rope) 1 cable)
55a One end portion 55b The other end portion 55d First linear portion 55e Second linear portion 57 Second wire rope (second cord)
57a One end portion 57b Other end portion 57d First linear portion 57e Second linear portion 59 Upper fixing bracket 59a Curved portion 59b Flange portion

Claims (9)

A device that prevents the object installed on the fixed body from falling or falling by the cable body 20,
A first fixing unit 31b fixed to the fixed body and capable of fixing one end of the cable body 20,
A lower first passage portion 35b that is fixed to the object and allows the first linear portion 20d that is continuous to one end portion of the cord body 20 fixed to the first fixing portion 31b to be inserted;
A fixed-side first passage portion 32b that is fixed to the fixed body and allows the second linear portion 20e continuous with the first linear portion 20d of the cord body 20 to be inserted;
An upper first passage portion 36b that is fixed to the object above the lower first passage portion 35b and passes through the third linear portion 20f that is continuous with the second linear portion 20e of the cord body 20. When,
A fixed-side second passage portion 31b that is fixed to the fixed body and allows the fourth linear portion 20g that is continuous to the third linear portion 20f of the cord body 20 to be inserted;
A second lower portion that is fixed to the object at the same height as the lower first passage portion 35b and allows the fifth linear portion 20h that is continuous to the fourth linear portion 20g of the cord body 20 to be inserted therethrough. A passage part 35b;
A second fixing portion 32b fixed to the fixing body and capable of fixing the other end portion of the cord body 20 continuous with the fifth linear portion 20h,
The lower first passage portion 35b and the lower second passage portion 35b are configured such that the first linear portion 20d and the fifth linear portion 20h are pulled when the object falls or falls. A fall prevention device fixed to the object in a positional relationship.   The lower first passage portion 35b and the lower second passage portion 35b are fixed to the object so as to have a height position equal to or lower than that of the first fixing portion 31b and the second fixing portion 32b. The fall prevention device according to claim 1.   The fall prevention device according to claim 1 or 2, wherein the upper first passage portion 36b is fixed to the object so as to be positioned higher than the first fixing portion 31b and the second fixing portion 32b.   The fixed side first passing part 32b and the fixed side second passing part 31b are arranged so as to be opposite to each other across the passing parts 35b and 36b fixed to the object. 4. The fall prevention device according to any one of 3 above.   The fall prevention device according to any one of claims 1 to 4, wherein the lower first passage portion 35b and the lower second passage portion 35b are provided in a common metal fitting 35. The first fixing part 31b and the fixed side second passage part 31b are provided in a common metal fitting 31,
The fall prevention device according to any one of claims 1 to 4, wherein the second fixing portion 32b and the fixed-side first passage portion 32b are provided on a common metal fitting 32. A device for preventing the object installed on the fixed body from dropping or falling down by the rope bodies 55 and 57,
A first fixing unit 31b fixed to the fixed body and capable of fixing one end of the first cable body 55;
A lower first passage portion 35b that is fixed to the object and passes through a first linear portion 55d that is continuous with one end portion of the first cable body 55 that is fixed to the first fixing portion 31b;
A fixed-side first passage portion 32b that is fixed to the fixed body and that allows the second linear portion 55e of the first cable body 55 to be continuous to the first linear portion 55d to be inserted;
An upper first fixing portion 59b that is fixed to the object above the lower first passage portion 35b and can fix the other end portion of the first cable body 55 that is continuous with the second linear portion 55e. When,
A second fixing portion 32b capable of fixing one end portion of the second cable body 57 at substantially the same height as the first fixing portion 31b;
A lower second passage portion 35b which is fixed to the object and allows the first linear portion 57d to be inserted into one end portion of the second cord body 57 fixed to the second fixing portion 32b;
A fixed-side second passage portion 31b that is fixed to the fixed body and allows the second linear portion 57e of the second cord body 57 to be continuous with the first linear portion 57d;
An upper second fixing portion 59b that is fixed to the object above the lower second passage portion 35b and that can fix the other end portion of the second cord body 57 that is continuous with the second linear portion 57e. And comprising
The lower first passage portion 35b and the lower second passage portion 35b are arranged such that the first linear portion 55d of the first rope body 55 and the second rope body 57 when the object falls or falls. The fall prevention device is fixed to the object in such a positional relationship that the first linear portion 57d of the is pulled. A method of preventing the object installed on the fixed body from dropping or falling down by the cable body 20,
The cable body 20 whose one end is fixed to the fixed body includes a lower first passage portion 35b fixed to the object, a fixed first passage portion 32b fixed to the fixed body, and the lower first passage portion 35b. The upper first passage portion 36b fixed to the object above the object, the fixed second passage portion 31b fixed to the fixed body, and the lower second passage portion 35b fixed to the object are sequentially inserted, A fall prevention method for preventing the object from falling or overturning by fixing the other end of the cable body 20 to the fixed body. A method of preventing the objects installed on the fixed body from dropping or falling by the cords 55 and 57,
The first cable body 55 having one end fixed to the fixed body is sequentially inserted into the lower first passage section 35b fixed to the object and the first fixed passage section 32b fixed to the fixed body, and the lower The other end of the first cable body 55 is fixed to the object above the side first passage part 35b, and the second cable body 57 having one end fixed to the fixed body is fixed to the object. The lower second passage portion 35b and the fixed second passage portion 31b fixed to the fixed body are sequentially inserted, and the second cord body 57 is inserted into the object above the lower second passage portion 35b. A fall prevention method for preventing the object from falling or falling by fixing the other end.

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