JP2015145713A - Falling inhibition tool and falling inhibition structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively inhibit falling of suspended equipment even when large vibration acts, with a relatively simple structure and at low costs.SOLUTION: A falling inhibition tool 1 inhibiting falling of suspended equipment 81 supported to a suspension bolt 72 extending from a structure 71 includes a first fitting member 2 and a connection wire 5. The first fitting member 2 comprises a bent elastic plate, and is fitted to the suspension bolt 72 for localization. The connection wire 5 has one end fitted into a loop shape over a pair of opposite plate parts on an open end side in the first fitting member 2, and the other end 53 fixed to the structure 71 or the suspended equipment 81.

Description

  The present invention relates to a fall restraining tool and a fall restraining structure for restraining a suspended equipment suspended by a suspension bolt extending downward from a structure.

  As such a fall restraining tool, one described in Japanese Patent Application Laid-Open No. 2013-245688 (Patent Document 1) is known. The fall restraining tool of Patent Literature 1 includes a pair of hinged clamps attached to a suspension bolt, a clamp bolt that fastens the pair of clamps, and a wire that is hooked and held by the clamp bolt. I have. In Patent Document 1, by fixing the end of the wire opposite to the hooking part to the fastening bolt to the suspended equipment, even if a large vibration acts due to an earthquake or the like, the suspended equipment is dropped. It is said that it can be prevented.

  However, in the fall restraining tool of Patent Document 1, when a large vibration is applied, there is a possibility that the fastening state between the fastening bolt and the nut screwed to the fastening bolt is loosened. In particular, when a large vibration is applied to the extent that the suspended equipment may be dropped, the possibility increases. If the fastening state between the fastening bolt and the nut is loosened and they are detached, the pair of holding fittings cannot be maintained in a state where they are attached to the suspension bolt, and therefore the function as a fall restraining tool can no longer be achieved. Increasing the strength by using large fastening bolts and nuts can be considered as a countermeasure, but it tends to be complicated due to the increase in size and is not preferable from the viewpoint of cost.

JP 2013-245688 A

  Therefore, it is desired to realize a fall restraining tool and a fall restraining structure that can effectively restrain the falling of a suspended device even when a large vibration is applied at a low cost with a relatively simple configuration.

The fall arrester according to the present invention is
A fall deterrent tool that deters falling of suspended equipment supported by suspension bolts extending downward from the structure,
A first mounting member that is formed of an elastic plate that is bent in a substantially U shape, and is mounted and oriented from the open end side with respect to the suspension bolt;
One end is attached in a loop shape across the opposing plate part that forms a pair on the open end side relative to the attachment part to the suspension bolt in the first attachment member, and the other end is fixed to the structure or suspension device With connecting wire,
Is provided.

  According to this configuration, the first mounting member that is mounted and positioned from the crossing direction with respect to the suspension bolt is configured by only an elastic plate that is bent without using a fastening bolt or the like. For this reason, it is easy to maintain the said 1st attachment member in the state attached to the suspension bolt, also when a big vibration acts. Moreover, since one end of the connection wire fixed to the structure or the hanging device is attached in a loop shape to the opposing plate portion of the substantially U-shaped first attachment member, the open end side of the first attachment member is closed, Also from this point, it is easy to maintain the first attachment member attached to the suspension bolt. Therefore, when the connection wire is fixed to the suspension device, the support of the suspension device with respect to the suspension bolt can be assisted, and when the connection wire is fixed to the structure, the connection wire can be used even when the suspension bolt is broken. The suspended equipment can be supported on the structure via the. Therefore, in any case, dropping of the suspended equipment can be effectively suppressed. In addition, the above-described effects can be obtained at a low cost with a relatively simple configuration by using the first mounting member formed of an elastic plate bent and formed in a substantially U shape and the connecting wire attached thereto. it can.

  Hereinafter, the suitable aspect of the fall suppression tool which concerns on this invention is demonstrated. However, the scope of the present invention is not limited by the preferred embodiments described below.

  As one aspect, the second mounting member is configured by an elastic plate bent and formed in a substantially U shape, and is mounted from the open end side with respect to the suspension bolt, and the first mounting member and the first mounting member. It is preferable to further include a connection member that connects the two attachment members.

  According to this configuration, since the second mounting member can be easily maintained in a state of being attached to the suspension bolt regardless of the magnitude of vibration, the second mounting member is separately provided even when a large vibration is applied. It is easy to achieve the intended purpose. Moreover, since the first mounting member and the second mounting member can be collectively handled by the presence of the connecting member, the construction can be facilitated. For example, the first attachment member or the second attachment member can be attached to the suspension bolt while preventing the operator from dropping due to a mishandling or the like in a state where the operator holds the connection member. After either the first attachment member or the second attachment member is attached, the other attachment member is attached to the suspension bolt in a state in which the attachment is prevented by the attached attachment member and connection member. be able to.

The fall prevention structure according to the present invention is
A fall restraining structure for restraining the dropping of a suspended device having a mounting piece that is sandwiched and fixed from above and below by a pair of nuts that are screwed into a suspension bolt that extends downward from the structure,
A first mounting member formed of an elastic plate bent in a substantially U shape is attached to the suspension bolt in a state where the first mounting member is in contact with the lower surface of the nut positioned below the mounting piece of the pair of nuts. For mounting from the open end side,
One end of the connecting wire is attached in a loop shape across the opposing plate part that is paired on the open end side with respect to the attachment part to the suspension bolt in the first attachment member, and the other end is fixed to the structure. .

  There is a case in which a hanging device that is suspended and supported by a suspension bolt that extends downward from a structure is fixed by being sandwiched from above and below by a pair of nuts that are screwed into the suspension bolt. In such a configuration, it is often the lower nut of the pair of upper and lower nuts that is likely to loosen first when large vibrations are applied.

  In view of this point, according to the above-described configuration, the first mounting member that is mounted on the suspension bolt and is positioned contacts the lower surface of the nut on the lower side of the mounting piece and restricts its rotation. Even when it acts, the nut can be prevented from loosening. Since the first mounting member is composed only of an elastic plate that is bent without using a fastening bolt or the like, the first mounting member is attached to the suspension bolt regardless of the presence or absence of vibration. Easy to maintain. In addition, since one end of the connecting wire fixed to the structure is attached in a loop shape to the opposing plate portion of the substantially U-shaped first attachment member, the open end side of the first attachment member is closed, and from this point as well It is easy to maintain the first attachment member attached to the suspension bolt. Furthermore, since the other end of the connection wire is fixed to the structure, the suspended device can be supported on the structure via the connection wire even if the suspension bolt breaks. Therefore, it is possible to effectively prevent the suspended equipment from dropping. In addition, the above-described effects can be obtained at a low cost with a relatively simple configuration by using the first mounting member formed of an elastic plate bent and formed in a substantially U shape and the connecting wire attached thereto. it can.

  Hereinafter, the suitable aspect of the fall prevention structure which concerns on this invention is demonstrated. However, the scope of the present invention is not limited by the preferred embodiments described below.

  As one aspect, in a state in which the second mounting member formed of an elastic plate bent and formed in a substantially U shape is in contact with the upper surface of the nut positioned above the mounting piece of the pair of nuts. It is preferable that the suspension bolt is mounted and positioned from the open end side.

  According to this configuration, the second mounting member attached to the suspension bolt and positioned is in contact with the upper surface of the nut on the upper side of the mounting piece and restricts its rotation. Can be prevented from loosening. Since the second mounting member is composed only of a bent elastic plate without using a fastening bolt or the like, the second mounting member is attached to the suspension bolt without depending on the presence or absence of vibration. Easy to maintain. As a result, the first mounting member and the second mounting member more reliably suppress the loosening of one of the pair of nuts by further sandwiching the pair of nuts that sandwich the mounting piece of the suspended device from above and below. can do. Therefore, it is possible to more reliably prevent the suspended equipment from dropping.

The perspective view which shows the support structure of the hanging apparatus which concerns on embodiment The perspective view which shows the whole structure of a fall prevention tool Front view with the fall arrester attached to the suspension bolt Top view of first mounting member Front view of the first mounting member Side view of the first mounting member Top view of the second mounting member Front view of the second mounting member Front view showing another aspect of the fall arrester Front view showing another aspect of the fall arrester

  An embodiment of a fall prevention tool according to the present invention will be described with reference to the drawings. The fall restraining tool 1 according to the present embodiment is an instrument for restraining the dropping of a suspended device 81 supported by a suspension bolt 72 extending downward from a structure 71. The fall prevention tool 1 according to the present embodiment is characterized by the following points. That is, the fall deterrent tool 1 includes a first attachment member 2 formed of an elastic plate bent in a substantially U shape, and a connecting wire 5 attached to the first attachment member 2. The first attachment member 2 is attached to the suspension bolt 72 from the open end side and is positioned at the suspension bolt 72. One end of the connecting wire 5 is attached in a loop over the pair of opposing plate portions 26 on the open end side of the first attachment member 2, and the other end is fixed to the structure 71 or the hanging device 81. Thereby, it is possible to effectively prevent the suspension device 81 from dropping even when a large vibration is applied at a low cost with a relatively simple configuration. Hereinafter, the fall prevention tool 1 which concerns on this embodiment is demonstrated in detail.

  In FIG. 1, the support structure of the hanging apparatus 81 which concerns on this embodiment is shown. As shown in this figure, the present support structure is provided with a plurality of (for example, four) suspension bolts 72 extending downward from the structure 71 along the vertical direction, and mounting pieces provided on the side surface of the suspension device 81. 82 is connected. The structure 71 is, for example, a concrete ceiling slab or a beam. The hanging device 81 is, for example, an indoor unit of an air conditioning device, a lighting device, a cable rack, or the like. Hereinafter, a structure in which an indoor unit (an example of a suspended device 81) of an air conditioner is suspended and supported by four suspension bolts 72 suspended from a ceiling slab (an example of a structure 71) will be described.

  As shown in FIG. 1, the hanging device 81 has a mounting piece 82 provided on its side surface so as to protrude outward. The attachment piece 82 is provided along the horizontal direction. The attachment piece 82 is formed with a notch groove 83 in which the suspension bolt 72 can be engaged and disengaged from the lateral outer side. In a state where the suspension bolt 72 is inserted into the notch groove 83 of the attachment piece 82, the attachment piece 82 is sandwiched from above and below by a pair of nuts 76 and 78 that are screwed to the suspension bolt 72. The pair of nuts 76 and 78 are attached to the suspension device 81 by setting the suspension bolts 72 by tightening the upper and lower surfaces of the attachment piece 82 via the lower washer 75 and the upper washer 77 (see FIG. 3), respectively. It is fixedly connected to the position. In this way, the suspension device 81 is supported by the suspension bolt 72.

  As the lower washer 75 and the upper washer 77, for example, an anti-vibration washer in which a metal washer part and a resin or synthetic rubber washer part are laminated can be used. However, the present invention is not limited to such a configuration, and a normal washer may be used, and the installation of the lower washer 75 and the upper washer 77 may be omitted.

  In the present embodiment, two brace bolts 74 (an example of an anti-sway member) are connected to each pair of suspension bolts 72 facing each other in the left-right direction and the front-rear direction so as to intersect each other. Thereby, it has the structure which can suppress the shaking motion of the hanging apparatus 81 resulting from an earthquake etc.

  As shown in FIG. 1, in the present embodiment, the suspension device 81 is prevented from dropping at a fixing portion (a holding portion of the mounting piece 82 by the pair of nuts 76 and 78) between the suspension bolt 72 and the suspension device 81. The fall prevention tool 1 for this is installed. The fall restraining tool 1 is installed in a state that spans the suspension bolt 72 and the structure 71 in this embodiment. As shown in FIG. 2, the fall restraining tool 1 is composed of an elastic plate bent in a substantially U shape and can be attached to the first attachment member 2 and attached to the suspension bolt 72. Connecting wire 5. In the present embodiment, the fall restraining tool 1 is composed of an elastic plate bent and formed in a substantially U shape, and is attached to the suspension bolt 72, the first attachment member 2, and the second attachment member 3. And a connection wire 4 for connecting the two.

  The “substantially U-shaped” means that when viewed from any direction (for example, the vertical direction), the end portion on the opposite side of the folded portion is folded back in a plane symmetrical manner at a predetermined position as a whole. It means the shape to be opened. If it is such a shape as a whole, it is a concept that the presence of some unevenness is allowed. Further, the “bently formed elastic plate” means a plate-like member that can exert an elastic force in a bent state, and the plate-like member itself may be either an elastic body or a non-elastic body. good.

  The first attachment member 2 is formed by bending a band-shaped metal plate into a predetermined shape. As shown in FIGS. 4 and 5, the first mounting member 2 includes a pair of curved plate portions 21 that bulge outward and a connecting plate portion 23 that couples the pair of curved plate portions 21. Each of the pair of curved plate portions 21 has a pair of opposed plate portions 26 that face each other on the side opposite to the connecting plate portion 23. The curved plate portion 21 is formed to have a substantially semi-cylindrical shape having an inner diameter along the outer diameter of the suspension bolt 72. The outer periphery of the suspension bolt 72 is surrounded by the pair of curved plate portions 21. The curved plate portion 21 becomes “an attachment portion to the suspension bolt 72 in the first attachment member 2”. The curved plate portion 21 is formed with a locking projection 22 that protrudes to the inner surface side.

  In the present embodiment, the locking protrusion 22 is configured as a dot-like protrusion formed by being divided into a plurality of vertical locations (two locations in this example). The separation length between the two locking projections 22 adjacent to each other in the vertical direction is set to an integral multiple of the formation pitch of the fitted groove 73 (see FIG. 3) defined between the threads of the suspension bolt 72. . The locking protrusion 22 is fitted in the fitting groove 73 in a state where the first mounting member 2 is mounted on the suspension bolt 72, and the bolt mounting center direction of the first mounting member 2 with respect to the suspension bolt 72 is Direction) relative position. That is, the first mounting member 2 is positioned in the bolt axial direction with respect to the suspension bolt 72 due to the presence of the locking protrusion 22. Note that “localization” means that the position is constant. The locking protrusion 22 functions as a “first positioning portion” for positioning the first mounting member 2 in the bolt axial direction with respect to the suspension bolt 72.

  The connecting plate portion 23 connects end portions on one side of each of the pair of curved plate portions 21. The connecting plate portion 23 is bent to have a U-shaped cross section (angular U shape). Two surface portions facing each other in the connecting plate portion 23 serve as a gripping portion 24 for the operator to grip the first mounting member 2 when mounting to the suspension bolt 72. It is preferable that the grip part 24 has a length (for example, 5 to 15 mm) that allows the operator to stably grip with the fingertip. As shown in FIGS. 4 and 6, an insertion hole 25 is provided in the center of the remaining surface portion that becomes the non-gripping portion in the connecting plate portion 23. The insertion hole 25 is formed as a circular hole in this example. In the present embodiment, the insertion hole 25 has an inner diameter that is slightly larger than the outer diameter of the connection wire 4 described later. The first connection end portion 42 of the connection wire 4 is inserted into the insertion hole 25 in a retaining state.

  As shown in FIGS. 4 and 5, the opposing plate portion 26 is provided at an end portion on the opposite side to the connecting plate portion 23 in each of the pair of curved plate portions 21. The pair of opposed plate portions 26 are opposed substantially parallel to the curved plate portion 21 serving as a mounting portion to the suspension bolt 72 on the open end side. The separation length between the pair of opposed plate portions 26 is set to be sufficiently smaller than the outer diameter of the suspension bolt 72. For example, it is set to 1/2 or less, preferably 1/3 or less of the outer diameter of the suspension bolt 72. In the example of FIG. 4, it is set to about 1/4. The separation length between the pair of gripping portions 24 in the connecting plate portion 23 is set to be smaller than the outer diameter of the suspension bolt 72 and larger than the separation length between the pair of opposing plate portions 26. ing.

  As shown in FIG. 5, an insertion hole 27 is provided in the center of the substantially rectangular counter plate portion 26. The insertion hole 27 is formed as a circular hole in this example. The insertion hole 27 of the counter plate part 26 has a larger inner diameter than the insertion hole 25 of the connecting plate part 23. In a state of being inserted through the insertion hole 27, a loop-shaped attachment portion 52 of the connecting wire 5 described later is attached in a loop shape across the pair of opposed plate portions 26 (see FIG. 3).

  The first mounting member 2 further includes a pair of guide plate portions 28 provided on the open end side that is opposite to the pair of curved plate portions 21 with respect to the pair of opposed plate portions 26. As shown in FIG. 4, the pair of guide plate portions 28 are formed in a divergent shape in which the distance between the guide plate portions 28 gradually increases from the opposing plate portion 26 side toward the open end side. When the first mounting member 2 is attached to the suspension bolt 72 in the crossing direction, the guide plate portion 28 elastically deforms the first attachment member 2 along the outer shape of the suspension bolt 72 so that the open end side is smoothly spread. Act on. In this way, the guide plate portion 28 functions as a guide for guiding the suspension bolt 72 between the pair of curved plate portions 21.

  When the suspension bolt 72 reaches between the pair of curved plate portions 21, due to the elastic restoring force of the first mounting member 2, the inner surface of the pair of curved plate portions 21 is the outer surface of the suspension bolt 72 (by the tip of the thread). The suspension bolt 72 is surrounded in a state where it abuts the defined envelope surface. As described above, the separation length between the pair of gripping portions 24 and the separation length between the pair of opposed plate portions 26 are both smaller than the outer diameter of the suspension bolt 72. For this reason, in a state where the first attachment member 2 is attached to the suspension bolt 72, the pair of gripping portions 24 and the pair of opposed plate portions 26 cooperate with each other so that the first attachment member 2 for the suspension bolt 72 is provided. The relative position in the direction (mounting direction) intersecting the bolt axis direction is determined. That is, the first mounting member 2 is positioned in the mounting direction with respect to the suspension bolt 72 due to the presence of the pair of gripping portions 24 and the pair of opposed plate portions 26. The pair of gripping portions 24 and the pair of opposing plate portions 26 function as “second positioning portions” for positioning the first mounting member 2 in the mounting direction relative to the suspension bolt 72.

  The second mounting member 3 is formed by bending a belt-shaped metal plate into a predetermined shape. As shown in FIGS. 7 and 8, the first mounting member 2 includes a pair of curved plate portions 31 that bulge outward and a connecting plate portion 33 that couples the pair of curved plate portions 31. Have The curved plate portion 31 is formed to have a substantially semi-cylindrical shape having an inner diameter along the outer diameter of the suspension bolt 72. The outer periphery of the suspension bolt 72 is surrounded by the pair of curved plate portions 21. The curved plate portion 21 becomes “an attachment portion to the suspension bolt 72 in the second attachment member 3”. The curved plate portion 21 is formed with a locking projection 32 that protrudes to the inner surface side thereof. The second mounting member 3 is positioned in the bolt axial direction with respect to the suspension bolt 72 due to the presence of the locking protrusion 32.

  The connecting plate portion 33 connects end portions on one side of each of the pair of curved plate portions 31. The connecting plate portion 33 is bent to have a U-shaped cross section (angular U shape). Two surface portions facing each other in the connecting plate portion 33 serve as a gripping portion 34 for an operator to grip the second mounting member 3 when attaching to the suspension bolt 72. An insertion hole 35 is provided in the center of the remaining surface portion that becomes the non-gripping portion in the connecting plate portion 33. In this example, the insertion hole 35 is formed as a circular hole similar to the insertion hole 25 of the first mounting member 2. A second connection end 43 of a connection wire 4 to be described later is inserted into the insertion hole 35 in a retaining state.

  The second attachment member 3 further includes a pair of guide plate portions 38 provided on the open end side that is opposite to the connection plate portion 33 with respect to the pair of curved plate portions 31. As shown in FIG. 7, the pair of guide plate portions 38 are formed in a divergent shape in which the distance between them gradually increases from the curved plate portion 31 side toward the open end side. When attaching the second mounting member 3 to the suspension bolt 72 in the cross direction, the guide plate portion 38 elastically deforms the second mounting member 3 along the outer shape of the suspension bolt 72 so that the open end side is smoothly spread. Act on. In this manner, the guide plate portion 38 functions as a guide for guiding the suspension bolt 72 between the pair of curved plate portions 31.

  When the suspension bolt 72 reaches between the pair of curved plate portions 31, the pair of curved plate portions 31 are suspended in a state where the inner surfaces thereof abut against the outer surface of the suspension bolt 72 due to the elastic restoring force of the second mounting member 3. The bolt 72 is surrounded. In a state where the second attachment member 3 is attached to the suspension bolt 72, the pair of gripping portions 34 and the pair of guide plate portions 38 cooperate with each other so that the bolt shaft of the second attachment member 3 with respect to the suspension bolt 72. The relative position in the direction intersecting the core direction (mounting direction) is determined. That is, the second mounting member 3 is positioned in the mounting direction with respect to the suspension bolt 72 due to the presence of the pair of gripping portions 34 and the pair of guide plate portions 38.

  As shown in FIGS. 2 and 3, the connection wire 4 is provided across the first attachment member 2 and the second attachment member 3. The connection wire 4 includes a wire body 41 having a first connection end 42 and a second connection end 43 at both ends (see also FIGS. 4 and 7). As the wire main body 41, for example, a metal wire rope (single wire or stranded wire) can be used. As the stranded wire, for example, a collective stranded wire formed by twisting a plurality of strands, a composite stranded wire obtained by further twisting a plurality of collective stranded wires, or the like can be used. The periphery of the wire main body 41 may be covered with a covering material made of a resin material or the like. In the present embodiment, the wire main body 41 (connection wire 4) has flexibility. In the present embodiment, the connection wire 4 corresponds to the “connection member” in the present invention.

  As shown in FIGS. 4 and 7, the first connection end portion 42 and the second connection end portion 43 are subjected to a retaining process while being inserted through the insertion hole 25 and the insertion hole 35, respectively. Specifically, a retaining member (not shown) having a size larger than the inner diameters of the insertion hole 25 and the insertion hole 35 is fixed by, for example, brazing or caulking. Thereby, the 1st attachment member 2 and the 2nd attachment member 3 are connected so that relative displacement is possible in the state mutually restrained so that it may be located in predetermined distance.

  As shown in FIG. 1, the connecting wire 5 is provided across the first attachment member 2 and the structure 71 in the present embodiment. The connection wire 5 includes a wire main body 51 having a loop-shaped attachment portion 52 and a target attachment portion 53 at both ends (see also FIG. 3). As the wire main body 51, the same material as that of the wire main body 41 constituting the connection wire 4 can be used. The loop-shaped attachment portion 52 provided at one end of the connecting wire 5 is attached to the first attachment member 2 in a state of being inserted through the insertion holes 27 formed in the pair of opposed plate portions 26 of the first attachment member 2. Thereby, the connection wire 5 is attached in a loop shape across the pair of opposed plate portions 26. The loop-shaped attachment portion 52 also functions as an open end closing portion that closes the open end side of the first attachment member 2 bent in a substantially U shape after being attached to the suspension bolt 72. The loop-shaped attachment portion 52 is formed by inserting one end of the wire main body 51 into the two insertion holes 27 and then brazing or joining the wire main body 51 or extrapolating the wire main body 51 to the wire main body 51. It can be configured by caulking together with the shaped member.

  As shown in FIG. 1, the target attachment portion 53 provided at the other end of the connection wire 5 (the end opposite to the loop attachment portion 52) is fixed to the structure 71. The connection wire 5 (target mounting portion 53) is “fixed to the structure 71” means other than a mode in which the connection wire 5 (target mounting portion 53) is directly fixed to the structure 71, other members such as a hanging hook and an embedded bolt. This is a concept including an aspect in which the structure 71 is indirectly fixed to the structure. In the present embodiment, the connecting wire 5 is provided across the first attachment member 2 and the structure 71 in a relaxed state having a predetermined slack.

  Hereinafter, the fall prevention structure for suppressing the fall of the hanging apparatus 81 implement | achieved using the fall prevention tool 1 which concerns on this embodiment is demonstrated. As shown in FIG. 1 and FIG. 3, the hanging device 81 is vertically moved by a lower nut 76 and an upper nut 78 in which a mounting piece 82 protruding from the side surface is screwed to a hanging bolt 72 extending downward from the structure 71. It is fixed in a state where it is pinched. In order to apply the fall deterrent tool 1 to such an installation structure of the hanging device 81, first, the first attachment member 2 is moved from the open end side in a state where the upper edge of the first attachment member 2 is in contact with the lower surface 76a of the lower nut 76. Insert and attach to the suspension bolt 72 in the crossing direction. At this time, the operator can attach the first attachment member 2 to the suspension bolt 72 while preventing the drop restraint tool 1 from dropping due to a mishandling or the like while holding the connection wire 4.

  When the pair of curved plate portions 21 of the first mounting member 2 are inserted to the position of the suspension bolt 72, the pair of curved plate portions 21 enclose the suspension bolt 72 and engage with the elastic restoring force of the first mounting member 2. The stop projection 22 is fitted into the fitted groove 73 of the suspension bolt 72. As a result, the first mounting member 2 is positioned relative to the suspension bolt 72. That is, the position of the bolt axis direction with respect to the suspension bolt 72 of the first mounting member 2 and the position in the mounting direction intersecting therewith are determined to be constant. Thus, the first mounting member 2 maintains a state in which the upper end edge thereof is in contact with the lower surface 76a of the lower nut 76.

  Next, the second attachment member 3 connected to the other end of the connection wire 4 (the end opposite to the first attachment member 2) is in a state where the lower end edge thereof abuts on the upper surface 78a of the upper nut 78. Insert and attach in the crossing direction to the suspension bolt 72 from the open end side. At that time, the operator can attach the second attachment member 3 to the suspension bolt 72 in a state where the first attachment member 2 and the connection wire 4 that have already been attached are prevented from falling.

  When the pair of curved plate portions 31 of the second mounting member 3 are inserted up to the position of the suspension bolt 72, the pair of curved plate portions 31 enclose the suspension bolt 72 and engage with the elastic restoring force of the second mounting member 3. The stop protrusion 32 is fitted in the fitting groove 73 of the suspension bolt 72. As a result, the second mounting member 3 is positioned relative to the suspension bolt 72. That is, the position of the bolt axis direction with respect to the suspension bolt 72 of the second mounting member 3 and the position in the mounting direction intersecting therewith are determined to be constant. Thus, the second mounting member 3 maintains a state in which the lower end edge thereof is in contact with the upper surface 78a of the upper nut 78.

  Finally, after inserting one end of the wire main body 51 constituting the connecting wire 5 into the insertion hole 27 formed in the pair of opposing plate portions 26 of the first mounting member 2, the wire is fixed using a predetermined fixing means. The main body 51 is fixed. Thereby, the connecting wire 5 is attached in a loop over the pair of opposed plate portions 26. Moreover, the other end (target attaching part 53) of the wire main-body part 51 is fixed to the structure 71 which is a fixed target object in this embodiment. For fixing the target mounting portion 53 to the structure 71, various known fixing methods can be applied.

  In the fall prevention structure according to the present embodiment, the first mounting member 2 abuts against the lower surface 76a of the lower nut 76 and restricts its rotation, so that the lower nut 76 is prevented from loosening even when a large vibration is applied. can do. Moreover, since the 2nd attachment member 3 contact | abuts to the upper surface 78a of the upper nut 78, and the rotation is controlled, it can suppress that the said upper nut 78 loosens also when a big vibration acts. Therefore, the first mounting member 2 and the second mounting member 3 that are positioned with respect to the suspension bolt 72 sandwich the pair of lower nut 76 and upper nut 78 from above and below, and any of these is loosened by vibration. Can be suppressed with high certainty.

  Since both the first mounting member 2 and the second mounting member 3 are composed only of elastic plates that are bent without using fastening bolts or the like, the first mounting member 2 can be used regardless of the presence or absence of vibration. And it is easy to maintain the 2nd attachment member 3 in the state attached to the suspension bolt 72. FIG. That is, since the fastening bolt that may be loosened by vibration is not provided in the first place, the first attachment member 2 and the second attachment member 3 are stably attached to the suspension bolt 72. In addition, since one end of the connecting wire 5 is attached in a loop shape to the pair of opposed plate portions 26 of the substantially U-shaped first attachment member 2, the opening end side of the first attachment member 2 is closed. It is easy to maintain the first attachment member 2 in the state attached to the suspension bolt 72. Therefore, it is possible to effectively prevent the hanging device 81 from falling.

  Furthermore, even if the suspension bolt 72 breaks due to aging of the suspension bolt 72 or a large earthquake exceeding the assumption, the suspended equipment 81 is connected to the structure 71 via the connecting wire 5. Can be supported. Therefore, also from this point, it is possible to effectively prevent the hanging device 81 from dropping. By suppressing the falling of the suspended equipment 81, not only the primary disaster to the human body can be suppressed, but also the occurrence of secondary disasters such as traffic obstruction of the evacuation route and fires can be suppressed.

  In addition, the drop restraining tool has a relatively simple configuration including the first mounting member 2 and the second mounting member 3, which are formed of an elastic plate bent in a substantially U shape, the connection wire 4, and the connection wire 5. 1 can be used to effectively prevent the suspension device 81 from dropping at low cost. Moreover, since it is the fall prevention tool 1 of a simple structure, it is easy to apply to existing equipment as well as new equipment.

[Other Embodiments]
Finally, other embodiments of the fall arrester and fall restraint structure according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises.

(1) In the above embodiment, the configuration in which the fall restraining tool 1 further includes the second mounting member 3 and the connection wire 4 in addition to the first mounting member 2 and the connecting wire 5 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, as shown in FIG. 9, the fall restraining tool 1 may be configured to include only the first mounting member 2, the second mounting member 3, and the connecting wire 5 without including the connection wire 4. Even with such a configuration, it is possible to reliably prevent at least one of the pair of lower nut 76 and upper nut 78 from loosening due to vibration, and to effectively prevent the suspension device 81 from falling.

  Alternatively, as shown in FIG. 10, the fall restraining tool 1 may be configured to include only the first mounting member 2 and the connecting wire 5 without including the connection wire 4 and the second mounting member 3. In a configuration in which the attachment piece 82 of the hanging device 81 is sandwiched from above and below by a pair of lower nut 76 and upper nut 78, it is often the lower nut 76 that tends to loosen first when large vibrations are applied. For this reason, even if it is the fall deterrent tool 1 provided only with the 1st attachment member 2 and the connection wire 5, the lower nut 76 is made to contact the 1st attachment member 2 with the lower surface 76a of the lower nut 76, and is positioned. Loosening can be suppressed, and dropping of the suspended equipment 81 can be effectively suppressed.

(2) The specific configurations of the first mounting member 2 and the second mounting member 3 described in the above embodiment are merely examples, and the embodiment of the present invention is not limited thereto. For example, the locking protrusions 22 and the locking protrusions 32 may be projecting piece-like protrusions formed in an inclined posture along the spiral shape of the fitting groove 73 of the suspension bolt 72. Further, for example, in the first mounting member 2, the counter plate portion 26 and the guide plate portion 28 are integrated, and the insertion hole 27 is formed in the pre-expanded guide plate portion 28 provided continuously from the curved plate portion 21. Also good. For example, the insertion hole 27 and the insertion holes 25 and 35 may be formed in arbitrary shapes.

(3) The connection structure between the first attachment member 2 and the second attachment member 3 and the connection wire 4 described in the above embodiment is merely an example, and the embodiment of the present invention is not limited thereto. For example, the connection wire 4 and the both attachment members 2 and 3 may be connected by loop-shaped attachment portions formed at both ends of the connection wire 4. Alternatively, the entire connection wire 4 may be formed in a loop shape extending over both the attachment members 2 and 3. In addition, other connection members other than the connection wire 4 may be used as long as the first attachment member 2 and the second attachment member 3 are connected to each other so as to be relatively displaceable.

(4) The connection structure between the connecting wire 5 and the first attachment member 2 described in the above embodiment is merely an example, and the embodiment of the present invention is not limited to this. For example, the whole connection wire 5 may be formed in a loop shape extending over the first attachment member 2 and the structure 71.

(5) The construction procedure of the fall restraining tool 1 on the installation structure of the hanging device 81 described in the above embodiment is merely an example, and the embodiment of the present invention is not limited to this. For example, you may attach the 1st attachment member 2 after attaching the 2nd attachment member 3 previously. Further, for example, the second attachment member 3 may be attached to the suspension bolt 72 after the connection wire 5 is attached to the first attachment member 2 first. For example, you may attach to the 1st attachment member 2 after fixing the connection wire 5 to the structure 71 previously.

(6) In the above embodiment, the configuration in which the connecting wire 5 is provided across the first attachment member 2 and the structure 71 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the connecting wire 5 may be provided across the first attachment member 2 and the hanging device 81. Even in such a configuration, the drop restraining device 1 including the first attachment member 2 that is stably attached to the suspension bolt 72 regardless of the presence or absence of vibration is used to assist the support of the suspension device 81 with respect to the suspension bolt 72. be able to. Therefore, it is possible to effectively prevent the hanging device 81 from falling. As the suspended equipment 81 in this case, for example, a lighting equipment, a cable rack, or the like that is lighter than the indoor unit of the air conditioning equipment can be exemplified.

(7) Regarding other configurations, it should be understood that the embodiments disclosed herein are illustrative in all respects and that the scope of the present invention is not limited thereby. Those skilled in the art will readily understand that modifications can be made as appropriate without departing from the spirit of the present invention. Accordingly, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a fall restraining tool and a fall restraining structure for restraining a suspended equipment suspended by a suspension bolt extending downward from a structure.

DESCRIPTION OF SYMBOLS 1 Fall prevention tool 2 1st attachment member 3 2nd attachment member 4 Connection wire (connection member)
5 Connecting wire 21 Curved plate part (mounting part)
26 Opposing plate portion 71 Structure 72 Suspension bolt 76 Lower nut 76a Lower surface 78 Upper nut 78a Upper surface 81 Hanging device 82 Mounting piece

Claims (4)

A fall deterrent tool that deters falling of suspended equipment supported by suspension bolts extending downward from the structure,
A first mounting member that is formed of an elastic plate that is bent in a substantially U shape, and is mounted and oriented from the open end side with respect to the suspension bolt;
One end is attached in a loop shape across the opposing plate part paired on the open end side with respect to the attachment part to the suspension bolt in the first attachment member, and the other end is fixed to the structure or the suspension device With connecting wire,
A fall arrester comprising A second mounting member that is formed of an elastic plate that is bent in a substantially U shape, and is mounted and positioned from the open end side with respect to the suspension bolt;
A connecting member connecting the first mounting member and the second mounting member;
The fall deterrent according to claim 1 further comprising: A fall restraining structure for restraining the dropping of a suspended device having a mounting piece that is sandwiched and fixed from above and below by a pair of nuts that are screwed into a suspension bolt that extends downward from the structure,
A first mounting member formed of an elastic plate bent in a substantially U shape is attached to the suspension bolt in a state where the first mounting member is in contact with the lower surface of the nut positioned below the mounting piece of the pair of nuts. For mounting from the open end side,
One end of the connecting wire is attached in a loop shape across the opposing plate part that is paired on the open end side with respect to the attachment part to the suspension bolt in the first attachment member, and the other end is fixed to the structure. Fall prevention structure.   A second mounting member formed of an elastic plate bent in a substantially U shape is attached to the suspension bolt in contact with the upper surface of the nut positioned above the mounting piece of the pair of nuts. The fall prevention structure according to claim 3, wherein the fall prevention structure is mounted from the open end side and is positioned.

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