Anti-fall device

Abstract

To provide a falling prevention tool that can be mounted to a bottle from either of an end part and a side face.SOLUTION: A falling prevention tool 10 comprises a coil spring part 20, a first hook part 30, a first arm part 40, a nut corresponding part 50, a second hook part 60, and a second arm part 70. When the second arm part 70 is put closer to the first arm part 40, a first curved region 31A of the first hook part 30 and a second curved region 61A of the second hook part 60 cross each other in three dimensions to form a space surrounded with the first curved region 31A and the second curved region 61A. At this time, a bolt opening part 62 of the second curved region 61A and a nut opening part 52 which is a space between one end 51B and the other end 51C of a fourth coil wire 51 face the same side across a first virtual curvature center axis 31C or a second virtual curvature center axis 61C, and the second hook part 60 and the nut corresponding part 50 are arranged on the same side across a length direction of a bolt.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dropout prevention device. Specifically, for example, it relates to a dropout prevention device that prevents a fixed object or nut from dropping off from a suspension bolt of a ceiling base material.

Background Art

[0002] Generally, as a method for fixing two members constituting a building structure, a method of fixing by welding or a method of fastening by bolts and nuts is used.

[0003] In addition, fixing by welding requires welding equipment, takes time and effort in construction, and also requires equipment when releasing the fixing, and takes time and effort to release the fixing. Therefore, the method of fastening by bolts and nuts is widely adopted.

[0004] However, in the method of fastening by bolts and nuts, since the bolts and nuts may loosen after fastening due to vibration or the like, several inventions have been proposed to prevent the bolts and nuts from loosening and the fixed object or nut from dropping off the bolt.

[0005] For example, Patent Document 1 describes a locking device 100 as shown in FIG. 6(b). That is, the locking device 100 prevents loosening of a nut 102 screwed onto a bolt 101.

[0006] The locking device 100 also includes a coil spring 104 shown in FIG. 6(a) and a ring member 106 shown in FIG. 6(b). The coil spring 104 is slightly smaller than the outer diameter of the bolt 101 and is formed in a spiral annular shape with an inner diameter that can be locked in the thread groove while expanding in the radial direction by elastic deformation.

[0007] Furthermore, the tip 105 of the wire strand 107 of the coil spring 104 is machined at an angle, as shown in Figure 6(b). As a result, the tip 105 fits into the gap between the bolt 101 and the nut 102 as it is screwed in, and the tip 105 acts as a stopper, preventing the nut 102 from rotating in the return direction.

[0008] Furthermore, as shown in Figure 6(b), the ring material 106 is formed in a cylindrical shape with an inclined outer surface, where the diameter of the surface opposite to the top surface (i.e., the surface facing the nut 102) and the diameter of the bottom surface (i.e., the surface facing the nut 102) are different.

[0009] Furthermore, the inner diameter of the ring material 106 is approximately the same as the outer diameter of the coil spring 104 fitted into the screw groove of the bolt 101. Furthermore, as shown in Figure 6(b), attaching the ring material 106 so as to cover the outer circumference of the coil spring 104 mounted in the screw groove makes the attachment of the anti-loosening device 100 more secure. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Utility Model Registration No. 3128915 Gazette [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] By the way, the anti-loosening device described in Patent Document 1 is designed to be attached to a bolt only from the end, and is not designed to be attached to a bolt from the side.

[0012] Among bolts, hexagonal bolts have a head integrated with the threaded portion at one end, and can fasten components by sandwiching them between the head and the hexagonal nut. Furthermore, the hexagonal nut and the other end of the hexagonal bolt are located on the opposite side of the component from the head, and since the other end is exposed, a locking device can be attached to the other end of the hexagonal bolt even after fastening.

[0013] On the other hand, a suspension bolt does not have a head like a hexagonal bolt, but has a threaded section that extends in the longitudinal direction, and is a bolt that can be fastened by sandwiching the member with two hexagonal nuts. Furthermore, suspension bolts are fastened by sandwiching the member between two hexagonal nuts near each end, or by having one end connected to building materials and fastening the member with a hexagonal nut near the other end.

[0014] Therefore, there was inevitably a hexagonal nut attached to the threaded portion between a member near one end and a member near the other end, or between a building material to which one end was connected and a member near the other end. In order to attach a locking device to that hexagonal nut, the locking device had to be attached from the side of the suspension bolt.

[0015] This invention was conceived in view of the above points, and aims to provide a fall prevention device that can be attached to a bolt from either the end or the side. [Means for solving the problem]

[0016] To achieve the above objective, the fall prevention device of the present invention includes a coil spring portion having a first coil wire including a first linear region extending substantially in a straight line, a winding region wound multiple times in a substantially circular shape with substantially the same diameter from the first linear region, and a second linear region extending substantially in a straight line from the winding region and positioned to intersect the first linear region in three dimensions, and a portion connected to the first linear region of the first coil wire, extending from the connection point with the first coil wire A first hook portion having a second coil strand that includes a first curved region which is convexly curved in the same direction as the winding radius direction of the winding region of the first coil strand, a first arm portion having a third coil strand which is connected to the second coil strand and extends from the connection point with the second coil strand in the same direction as the winding radius direction of the winding region of the first coil strand, and a third coil strand which is connected to the third coil strand and extends from the connection point with the third coil strand in the same direction as the winding radius direction of the winding region The device comprises a nut-compatible portion having a fourth coil wire that extends in a virtual plane extending in the same direction as the winding radius direction of the first curved region, forming at least one vertex on the opposite side of the curvature direction of the first curved region, and having one end connected to the third coil wire and the other end on the opposite side of that end spaced apart from each other by a predetermined distance; a second hook portion having a fifth coil wire that is connected to the second linear region and has a second curved region that is convexly curved from the connection point with the second linear region in a direction that intersects the first hook portion with the first hook portion at a radius of curvature approximately the same as the radius of curvature of the first hook portion, and is positioned between the first hook portion and the nut-compatible portion in the same direction as the winding radius direction of the winding region; and a second arm portion having a sixth coil wire that is connected to the fifth coil wire and has a sixth coil wire that extends from the connection point with the fifth coil wire in the same direction as the winding radius direction of the winding region.

[0017] Here, a coil spring section has a first coil wire that includes a first linear region extending in a substantially straight line, a winding region wound multiple times in a substantially circular shape with substantially the same diameter from the first linear region, and a second linear region extending substantially in a straight line from the winding region and positioned to intersect the first linear region in three dimensions. This allows the second linear region to be rotated with the winding center of the winding region as the pivot point, and when the second linear region is rotated and brought closer to the first linear region, a biasing force can be generated in the second linear region in a direction away from the first linear region.

[0018] Furthermore, when the second linear region is brought closer to the first linear region, the first curved region of the first coil strand and the second curved region of the second hooking part intersect in three dimensions, forming a space enclosed by the first curved region and the second curved region. This is achieved by having a first hooking part connected to the first linear region and having a second coil strand that includes a first curved region which is convexly curved in the same direction as the winding radius direction of the winding region of the first coil strand from the connection point with the first coil strand, and a second hooking part connected to the second linear region and having a second curved region which is convexly curved in the direction that intersects the first hooking part with the first hooking part at approximately the same radius of curvature as the first hooking part.

[0019] Furthermore, the biasing force generated by the coil spring portion, the first hook portion, and the second hook portion is transmitted to the second curved region of the second hook portion, thereby tightening the bolt located in the space enclosed by the first curved region and the second curved region. In other words, when this space is formed, spring stress is generated in the first and second curved regions in a direction that brings them closer together. Here, the radius of curvature of the first hook portion and the radius of curvature of the second hook portion are assumed to be approximately the same as the radius of curvature of the curved surface of the bolt to which the anti-loosening device of the present invention is attached. Therefore, the second coil strand of the first hook and the fifth coil strand of the second hook fit into the screw groove of the bolt.

[0020] Furthermore, the first arm portion is connected to the first linear region via the first hook portion, and the second arm portion is connected to the second linear region via the second hook portion. This is because the second linear region can be brought closer to the first linear region by bringing the second arm portion closer to the first linear region, and a space can be formed between the first curved region and the second curved region.

[0021] Furthermore, the nut-compatible portion has a fourth coil wire connected to the third coil wire, extending from the connection point with the third coil wire in a virtual plane that extends in the same direction as the winding radius direction of the winding region, forming at least one vertex on the opposite side of the curvature direction of the first curved region, and having one end connected to the third coil wire and the other end on the opposite side of that end spaced apart from each other by a predetermined distance, and a fifth coil wire connected to the second linear region, extending from the connection point with the second linear region in a convex curved direction that intersects the first hook portion with the first hook portion at a radius of curvature approximately the same as the radius of curvature of the first hook portion, and having a direction approximately perpendicular to the winding radius direction of the winding region. When the second hook portion, positioned between the first hook portion and the nut corresponding portion in the same direction, brings the second linear region closer to the first linear region, forming a space enclosed by the first curved region and the second curved region, the curved protrusion of the second curved region and at least one apex of the fourth coil strand are both located on the same side with respect to the first or second virtual curvature center axis. That is, the bolt opening of the second curved region and the space between one end and the other end of the fourth coil strand both face the same side with respect to the first or second virtual curvature center axis, and furthermore, the second hook portion and the nut corresponding portion can both be positioned on the same side with respect to the longitudinal direction of the bolt. Therefore, the second engaging portion and the nut corresponding portion can be brought closer to the bolt together from the side surface of the bolt, and the bolt can be disposed within the second engaging portion, that is, within the second curved region, and within the nut corresponding portion, that is, within the region surrounded by the fourth coil element wire.

[0022] Here, the "first virtual curvature center axis" is an imaginary axis that passes through the curvature center of the first curved region and extends in the same direction as the direction substantially orthogonal to the winding radius direction of the winding region. Also, the "second virtual curvature center axis" is an imaginary axis that passes through the curvature center of the second curved region and extends in the same direction as the direction substantially orthogonal to the winding radius direction of the winding region. Also, the "predetermined distance" means a distance longer than the outer diameter of the bolt. Also, the "bolt opening" is the space between one end of the fifth coil element wire of the second engaging portion connected to the second linear region of the first coil element wire and the other end opposite to this one end.

[0023] Also, by the nut corresponding portion having the fourth coil element wire that is connected to the third coil element wire and extends while forming at least one top portion on the virtual plane extending in the same direction as the winding radius direction of the winding region on the side opposite to the bending direction of the first curved region, even if the nut tries to rotate, the corner of the nut hits the side between the top portions of the nut corresponding portion, suppressing the rotation of the nut.

[0024] Also, in the anti-drop tool of the present invention, the three-dimensional intersection angle between the first linear region and the second linear region of the coil spring portion can be configured to be less than 180 degrees.

[0025] In this case, it is easy to sandwich the first arm portion and the second arm portion with fingers or the like.

[0026] Also, in the anti-drop tool of the present invention, the fourth coil element wire of the nut corresponding portion can be configured to be bent, forming a shape with a part of a hexagon missing and having four sides.

[0027] In this case, the shape of the nut-compatible part becomes more adaptable to the outer diameter of the nut, thus further suppressing the rotation of the nut.

[0028] Furthermore, in the fall prevention device of the present invention, the third coil strand of the first arm portion is connected to the second coil strand and includes one main region extending from the connection point with the second coil strand in the same direction as the winding radius direction of the winding region, a connecting region extending from the first main region in the same direction as substantially perpendicular to the winding radius direction of the winding region, and another main region extending from the connecting region substantially parallel to the first main region and connected to the fourth coil strand. The sixth coil strand of the second arm portion may be configured to include an end region extending from the opposite side of the connection point with the fifth coil strand in the same direction as substantially perpendicular to the winding radius direction of the winding region and toward a virtual plane where the fourth coil strand of the nut-compatible portion is arranged.

[0029] In this case, the range in which the first arm is pressed and the range in which the second arm is pressed are expanded, making it easier to press the first and second arms with a finger or other object.

[0030] Furthermore, in the fall prevention device of the present invention, the end region of the sixth coil strand can be configured to extend toward the main region, which is the region of the sixth coil strand that extends in the same direction as the winding radius direction of the winding region.

[0031] In this case, the area in which the second arm is pressed is further expanded, making it easier to press the second arm with a finger or other object.

[0032] Furthermore, in the fall prevention device of the present invention, the connection region of the third coil wire extends in a convex curve from the connection point of the third coil wire with the second coil wire toward the opposite side of the connection point, and the end region of the sixth coil wire extends in a convex curve from the connection point of the sixth coil wire with the fifth coil wire toward the opposite side of the connection point.

[0033] In this case, compared to a configuration where the connecting region and end region extend in a nearly straight line without curving, the range in which the first arm portion and the range in which the second arm portion are pressed are expanded, making it easier to press the first arm portion and the second arm portion with a finger or the like. [Effects of the Invention]

[0034] The anti-detachment device according to the present invention can be attached to a bolt from either the end or the side. [Brief explanation of the drawing]

[0035] [Figure 1] This is a schematic perspective view showing an example of a fall prevention device to which the present invention is applied. [Figure 2] This is a schematic side view showing an example of a fall prevention device to which the present invention is applied. [Figure 3] This is a schematic plan view showing an example of the state when the first hook portion and the second hook portion of the fall prevention device to which the present invention is applied intersect in a three-dimensional manner. [Figure 4-1] This is a schematic diagram showing an example of the first step when attaching the anti-detachment device to a bolt from the side, to which the present invention is applied. [Figure 4-2] This is a schematic diagram showing an example of the second step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied. [Figure 4-3] This is a schematic diagram showing an example of the third step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied. [Figure 4-4] This is a schematic diagram showing an example of the fourth step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied. [Figure 5] This is a schematic diagram showing an example of the state when the fall prevention device to which the present invention is applied is attached to a suspension bolt. [Figure 6] (a) is a schematic diagram showing the coil spring that constitutes a conventional anti-loosening device, and (b) is a schematic diagram showing how a conventional anti-loosening device looks when attached to a bolt. [Modes for carrying out the invention]

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings to facilitate understanding of the present invention.

[0037] Figure 1 is a schematic perspective view showing an example of a fall prevention device to which the present invention is applied. Figure 2 is a schematic side view showing an example of a fall prevention device to which the present invention is applied. Furthermore, Figure 3 is a schematic plan view showing an example of the state when the first hook portion and the second hook portion of the fall prevention device to which the present invention is applied intersect in a three-dimensional manner.

[0038] The fall prevention device 10 of the present invention, shown in Figure 1, includes a coil spring portion 20. Here, the coil spring portion 20 has a first coil wire 21.

[0039] Furthermore, the first coil wire 21 includes a first linear region 21A that extends in a substantially straight line. Furthermore, the first coil wire 21 includes a winding region 21B. Here, the winding region 21B is a region wound four times in a roughly circular shape with approximately the same diameter from the first linear region 21A. It should be noted that the number of volumes is not limited to four; it can be five or more.

[0040] Furthermore, a virtual winding center axis 21D is defined as an imaginary axis that extends in a direction substantially perpendicular to the winding radius direction of the winding region 21B and passes through the winding center of the winding region 21B.

[0041] Furthermore, the first coil wire 21 includes a second linear region 21C. Here, the second linear region 21C is a region that extends substantially linearly from the winding region 21B and intersects with the first linear region 21A in three dimensions.

[0042] Furthermore, the angle of spatial intersection Q between the first linear region 21A and the second linear region 21C of the coil spring portion 20 is less than 180 degrees, specifically, for example, 130 to 150 degrees.

[0043] Furthermore, the fall prevention device 10 of the present invention includes a first hook portion 30. Here, the first hook portion 30 has a second coil wire 31. Furthermore, the second coil strand 31 of the first hook portion 30 is connected to the first linear region 21A of the first coil strand 21.

[0044] Furthermore, the second coil strand 31 of the first hook portion 30 includes a first curved region 31A. Here, the first curved region 31A is a region that curves convexly in the same direction as the winding radius direction of the winding region 21B of the first coil wire 21, starting from the connection point with the first coil wire 21.

[0045] Furthermore, the first virtual curvature center axis 31C is defined as an immaterial axis that extends in the same direction as the direction substantially perpendicular to the winding radius direction of the winding region 21B, that is, in the same direction as the direction in which the virtual winding center axis 21D extends, and that passes through the first curvature center 31B, which is the curvature center of the first curvature region 31A.

[0046] Furthermore, the fall prevention device 10 of the present invention includes a first arm portion 40. Here, the first arm portion 40 has a third coil wire 41.

[0047] Furthermore, the third coil strand 41 of the first arm portion 40 includes one main region 41A. Here, the first main region 41A is connected to the second coil wire 31 and extends from the connection point with the second coil wire 31 in the same direction as the winding radius direction of the winding region 21B, but in the opposite direction to the coil spring portion 20.

[0048] Furthermore, the third coil strand 41 of the first arm portion 40 includes a connecting region 41C. Here, the connecting region 41C is a region that extends from one main region 41A in the same direction as the direction substantially perpendicular to the winding radius direction of the winding region 21B, that is, in the same direction as the virtual winding center axis 21D and the first virtual curvature center axis 31C. Furthermore, the connection region 41C of the third coil wire 41 extends in a convex curve from the connection point of the third coil wire 41 with the second coil wire 31 toward the opposite side of the connection point.

[0049] Furthermore, the third coil strand 41 of the first arm portion 40 includes another main region 41B. Here, the other main region 41B is a region that extends from the connecting region 41C approximately parallel to one of the main regions 41A.

[0050] Furthermore, the fall prevention device 10 of the present invention is equipped with a nut-compatible portion 50. Here, the nut-compatible portion 50 has a fourth coil strand 51. Furthermore, the fourth coil strand 51 of the nut-compatible section 50 is connected to the other main region 41B of the third coil strand 41.

[0051] Furthermore, the fourth coil strand 51 of the nut-compatible portion 50 extends from the connection point with the third coil strand 41 in a virtual plane that expands in the same direction as the winding radius direction of the winding region 21B of the coil spring portion 20, forming at least one apex 51A on the opposite side of the curvature direction of the first curved region 31A. In other words, the fourth coil strand 51 of the nut-compatible portion 50 is bent, forming a shape in which a part of the hexagon is missing, and which has four sides and three vertices 51A, with one of the vertices 51A being formed on the opposite side from the curvature direction of the first curved region 31A.

[0052] Furthermore, one end 51B of the fourth coil strand 51 of the nut-compatible portion 50, which is connected to the other main region 41B of the third coil strand 41, and the other end 51C on the opposite side of the one end 51B are arranged to be separated from each other by a predetermined distance, for example, a distance longer than the outer diameter of the bolt. The space between one end 51B and the other end 51C of the fourth coil wire 51 is the nut opening 52.

[0053] Furthermore, a receiving space 72 is formed in the space surrounded by the first hooking portion 30, the first arm portion 40, and the nut corresponding portion 50 of the fall prevention device 10 of the present invention. The receiving space 72 is a space for inserting a portion of the bolt when attaching the anti-detachment device 10 of the present invention to the bolt from the side of the bolt.

[0054] Furthermore, the fall prevention device 10 of the present invention is equipped with a second hook portion 60. Here, the second hook portion 60 has a fifth coil strand 61. Furthermore, the fifth coil strand 61 of the second hook portion 60 is connected to the second linear region 21C of the first coil strand 21.

[0055] Furthermore, the fifth coil strand 61 of the second hook portion 60 includes a second curved region 61A. Here, the second curved region 61A is a region that curves convexly from the connection point of the first coil strand 21 with the second straight region 21C toward the direction of intersecting the first hook portion 30 with a radius of curvature approximately the same as the radius of curvature of the first hook portion 30. In other words, the second curved region 61A is a region that curves convexly toward the first curved region 31A, while being in the same direction as the winding radius direction of the winding region 21B of the first coil wire 21, from the connection point with the second straight region 21C of the first coil wire 21.

[0056] Furthermore, the first curved region 31A of the first hook portion 30 and the second curved region 61A of the second hook portion 60 are each regions that are curved convexly toward a common virtual plane. Here, the "common virtual plane" is an immaterial plane that extends in the same direction as the virtual winding center axis 21D, passes through the winding center of the winding region 21B, but does not pass through the first linear region 21A and the second linear region 21C.

[0057] Furthermore, the space between one end 61D of the fifth coil strand 61 of the second hook portion 60, which is connected to the second linear region 21C of the first coil strand 21, and the other end 61E on the opposite side of the first end 61D, is the bolt opening 62.

[0058] Furthermore, as shown in Figure 2, the second hook portion 60 is positioned between the first hook portion 30 and the nut corresponding portion 50 in the same direction as the direction substantially perpendicular to the winding radius direction of the winding region 21B, that is, in the same direction as the direction in which the virtual winding center axis 21D extends.

[0059] Furthermore, the fall prevention device 10 of the present invention includes a second arm portion 70. Here, the second arm portion 70 has a sixth coil wire 71. Furthermore, the sixth coil strand 71 of the second arm portion 70 is connected to the other end 61E of the fifth coil strand 61.

[0060] Furthermore, the sixth coil strand 71 of the second arm portion 70 includes the main region 71A. Here, the main region 71A is a region that extends from the connection point with the fifth coil strand 61 in the same direction as the winding radius direction of the winding region 21B, but in the opposite direction to the coil spring portion 20.

[0061] Furthermore, the sixth coil strand 71 of the second arm portion 70 includes an end region 71B. Here, the end region 71B is a region that extends from the opposite side of the point where it is connected to the fifth coil strand 61, in the same direction as the direction substantially perpendicular to the winding radius direction of the winding region 21B, that is, in the same direction as the virtual winding center axis 21D extends, and toward the virtual plane where the fourth coil strand 51 of the nut corresponding portion 50 is arranged.

[0062] Furthermore, the end region 71B of the sixth coil strand 71 extends further toward the main region 71A.

[0063] Furthermore, the end region 71B of the sixth coil strand 71 extends in a convex curve from the connection point of the sixth coil strand 71 with the fifth coil strand 61 toward the opposite side of the connection point.

[0064] Furthermore, by pressing the first arm portion 40 and the second arm portion 70 of the fall prevention device 10 of the present invention against each other, for example by pinching them with your fingers, the second arm portion 70 can be brought closer to the first arm portion 40, as shown in Figure 3.

[0065] At this time, the first curved region 31A of the first hook portion 30 and the second curved region 61A of the second hook portion 60 intersect in a three-dimensional manner, forming a space enclosed by the first curved region 31A and the second curved region 61A. And bolts can be placed in this space.

[0066] Furthermore, when a space is formed enclosed by the first curved region 31A and the second curved region 61A, the curved protrusion of the second curved region 61A and at least one top 51A of the fourth coil wire 51 are both located on the same side with respect to the first virtual curvature center axis 31C or the second virtual curvature center axis 61C. That is, the bolt opening 62 of the second curved region 61A and the nut opening 52, which is the space between one end 51B and the other end 51C of the fourth coil wire 51, both face the same side with respect to the first virtual curvature center axis 31C or the second virtual curvature center axis 61C. Moreover, the second hook portion 60 and the nut corresponding portion 50 can both be positioned on the same side with respect to the longitudinal direction of the bolt.

[0067] Therefore, by bringing the second hook portion 60 and the nut corresponding portion 50 together closer to the bolt from the side of the bolt, the bolt can be positioned within the area enclosed by the second hook portion 60, i.e., the second curved region 61A, and the nut corresponding portion 50, i.e., the region surrounded by the fourth coil strand 51.

[0068] Furthermore, since the second hook portion 60 can approach the bolt from the side of the bolt together with the nut-compatible portion 50, the position of the nut-compatible portion 50 when the anti-loosening device 10 of the present invention is fully attached to the bolt can also be determined by the position of the second hook portion 60 during the attachment process. Furthermore, since the sixth coil strand 71 of the second arm portion 70 is connected to the fifth coil strand 61 of the second hook portion 60, the position of the nut-compatible portion 50 when the fall prevention device 10 of the present invention is attached to the bolt can also be determined by the position of the second arm portion 70 during the attachment process.

[0069] In other words, the nut-compatible portion 50 will ultimately be positioned in the direction that the second arm portion 70 is facing during installation, and if the second arm portion 70 is facing downwards during installation, the attachment of the anti-loosening device 10 of the present invention to the bolt will be completed with the nut-compatible portion 50 facing downwards. In this case, since the nut is positioned below the anti-loosening device 10 of the present invention, the anti-loosening device 10 of the present invention will be positioned on the upper surface of the nut.

[0070] On the other hand, if the second arm portion 70 is facing upward during installation, the attachment of the anti-loosening device 10 of the present invention to the bolt will be completed with the nut-compatible portion 50 ultimately facing upward. In this case, since the nut is positioned above the anti-loosening device 10 of the present invention, the anti-loosening device 10 of the present invention will be positioned on the underside of the nut.

[0071] Furthermore, the third coil strand 41 of the first arm portion 40 includes one main region 41A, a connecting region 41C, and another main region 41B, while the sixth coil strand 71 of the second arm portion 70 includes a main region 71A and an end region 71B. As is clear from Figure 1, the shapes of the first arm portion 40 and the second arm portion 70 are different from each other. Therefore, the first arm portion 40 and the second arm portion 70 become easier to distinguish from each other, and there is no risk of confusing them during installation.

[0072] Furthermore, the end region 71B of the second arm portion 70 is an area that extends from the opposite side of the point where it is connected to the fifth coil strand 61 toward the virtual plane where the fourth coil strand 51 of the nut-compatible portion 50 is positioned. Therefore, the orientation of the end region 71B of the second arm portion 70 when the installation is complete allows for the determination of the position of the nut-compatible portion 50 when the installation is complete, and furthermore, the position of the nut. Furthermore, since the first arm portion 40 and the second arm portion 70 are easily distinguishable from each other, it is easy to determine the position of the nut-compatible portion 50 when installation is complete, and even easier to determine the position of the nut.

[0073] In other words, when the anti-detachment device 10 of the present invention is attached to the bolt, if the end region 71B of the second arm portion 70 is facing downwards, the nut corresponding portion 50 is also positioned facing downwards. In this case, since the nut is positioned below the anti-loosening device 10 of the present invention, the anti-loosening device 10 of the present invention will be positioned on the upper surface of the nut.

[0074] On the other hand, when the anti-detachment device 10 of the present invention is attached to the bolt, if the end region 71B of the second arm portion 70 is facing upward, the nut corresponding portion 50 is also positioned facing upward. In this case, since the nut is positioned above the anti-loosening device 10 of the present invention, the anti-loosening device 10 of the present invention will be positioned on the underside of the nut.

[0075] In the fall prevention device of the present invention, the three-dimensional intersection angle between the first linear region and the second linear region of the coil spring portion does not necessarily have to be less than 180 degrees, and can be, for example, 180 degrees. However, if the angle of intersection is less than 180 degrees, it is preferable because it is easier to grasp the first and second arm sections with your fingers.

[0076] Furthermore, in the anti-fall device of the present invention, the fourth coil wire of the nut-compatible portion is not necessarily bent to form a shape in which a part of the hexagon is missing and which has four sides. However, if the fourth coil wire in the nut-compatible section has this shape, it is preferable because it can further suppress the rotation of the nut.

[0077] Furthermore, in the fall prevention device of the present invention, the third coil strand of the first arm portion does not necessarily have to include one main region, a connecting region, and another main region. Furthermore, in the fall prevention device of the present invention, the sixth coil strand of the second arm portion does not necessarily have to include an end region.

[0078] However, it is preferable if the third coil strand of the first arm portion includes one main region, a connecting region, and another main region, and the sixth coil strand of the second arm portion includes an end region, as this makes it easier to press the first and second arm portions with your fingers.

[0079] Furthermore, in the fall prevention device of the present invention, the end region of the sixth coil strand does not necessarily have to extend further toward the main region of the sixth coil strand. However, it is preferable if the end region of the sixth coil strand extends further toward the main region of the sixth coil strand, as this makes it easier to press the second arm portion with a finger.

[0080] Furthermore, in the fall prevention device of the present invention, the connecting region of the third coil strand and the end region of the sixth coil strand do not necessarily have to be curved and extended in a convex shape. However, if the connecting region of the third coil strand and the end region of the sixth coil strand are curved in a convex shape, it is preferable because it is easier to press the first arm portion and the second arm portion with your fingers than if they are curved and extend in a nearly straight line.

[0081] Furthermore, the first coil strand 21, the second coil strand 31, the third coil strand 41, the fourth coil strand 51, the fifth coil strand 61, and the sixth coil strand 71 constitute a single coil strand, and the coil spring portion 20, the first hook portion 30, the first arm portion 40, the nut corresponding portion 50, the second hook portion 60, and the second arm portion 70 are all made from a single coil strand, but of course, the invention is not limited to this configuration.

[0082] Next, the procedure for attaching the anti-loosening device of the present invention to the bolt from the side of the bolt, that is, from the same direction as the short side of the bolt, will be described. Here, the short-axis direction of the bolt is the direction approximately perpendicular to the long-axis direction of the bolt.

[0083] Figure 4-1 is a schematic diagram showing an example of the first step when attaching a fall prevention device to a bolt from the side, to which the present invention is applied. Figure 4-2 is a schematic diagram showing an example of the second step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied. Furthermore, Figure 4-3 is a schematic diagram showing an example of the third step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied. Furthermore, Figure 4-4 is a schematic diagram showing an example of the fourth step when attaching the anti-detachment device to the bolt from the side, to which the present invention is applied.

[0084] As shown in Figure 4-1, with the coil spring portion 20 of the fall prevention device 10 of the present invention facing the suspension bolt 80, the fall prevention device 10 of the present invention is moved in the same direction as the short side of the suspension bolt 80, bringing it closer to the suspension bolt 80 to which the nut 81 is attached.

[0085] At this time, the direction in which the virtual winding center axis 21D extends is made to be the same as the direction that is approximately perpendicular to the longitudinal direction of the suspension bolt 80. Furthermore, at this time, the second arm portion 70 of the fall prevention device 10 of the present invention is positioned to face the side where the nut 81 is located.

[0086] Next, as shown in Figure 4-2, the fall prevention device 10 of the present invention is brought into contact with the suspension bolt 80 so that a portion of the suspension bolt 80 fits into the receiving space 72 of the fall prevention device 10 of the present invention.

[0087] In this case as well, the direction in which the virtual winding center axis 21D extends is the same as the direction approximately perpendicular to the longitudinal direction of the suspension bolt 80, and the second arm portion 70 is oriented toward the side where the nut 81 is located.

[0088] Furthermore, at this time, the second hook portion 60 is located on the same side as the first hook portion 30, with respect to the longitudinal direction of the suspension bolt 80. Note that the central axis extending in the longitudinal direction of the suspension bolt 80 is not shown in the illustration. In other words, in Figure 4-2, the first hook portion 30 and the second hook portion 60 are located further back than the suspension bolt 80.

[0089] Furthermore, since the receiving space 72 of the fall prevention device 10 of the present invention is the space between the first hook portion 30 and the nut corresponding portion 50, the nut corresponding portion 50 is located on the opposite side from the first hook portion 30 with respect to the longitudinal direction of the suspension bolt 80. In other words, in Figure 4-2, the nut-compatible portion 50 is located in front of the suspension bolt 80.

[0090] Then, as shown in Figure 4-3, the second hook portion 60 is moved to a position in front of the suspension bolt 80. At this time, the fall prevention device 10 of the present invention is tilted so that the second arm portion 70 is positioned on the opposite side from the first arm portion 40 with respect to the longitudinal direction of the suspension bolt 80, and then the second hook portion 60 is moved to the front side of the suspension bolt 80.

[0091] Furthermore, using your fingers or the like, pinch the first arm portion 40 and the second arm portion 70 and push them in the pressing direction A, as shown in Figure 4-4. In this way, the first arm portion 40 and the second arm portion 70 move closer to each other, and the bolt opening 62 of the second curved region 61A of the second hook portion 60 and the nut opening 52 of the nut corresponding portion 50 both face the same side with respect to the first virtual curvature center axis 31C or the second virtual curvature center axis 61C.

[0092] Then, in this state, the fall prevention device 10 of the present invention is rotated by approximately 90 degrees, with the rotation center being a direction substantially perpendicular to the direction in which the virtual winding center axis 21D extends, that is, the same direction as the winding radius direction and passing between the first arm portion 40 and the second arm portion 70, so that the suspension bolt 80 passes through the bolt opening 62 and the nut opening 52.

[0093] After rotating, when the pressure is released by removing fingers or other objects from the first arm portion 40 and the second arm portion 70, the second coil strand 31 of the first hook portion 30 and the fifth coil strand 61 of the second hook portion 60 engage with the screw groove 80A formed between the screw threads 80B of the suspension bolt 80. At this time, the nut-compatible portion 50 of the fall prevention device 10 of the present invention is directed toward the nut 81 attached to the suspension bolt 80.

[0094] Then, as shown in Figure 4-4, the anti-loosening device 10 of the present invention is brought close to the nut 81 attached to the suspension bolt 80, and the nut-compatible portion 50 is attached to the nut 81.

[0095] Furthermore, when moving the fall prevention device 10 of the present invention in the longitudinal direction of the suspension bolt 80 while the suspension bolt 80 is inserted through the space enclosed by the first curved region 31A of the first hook portion 30 and the second curved region 61A of the second hook portion 60, it is easier to move the device by slightly tilting the entire fall prevention device 10 of the present invention, for example, by pinching the first arm portion 40 and the second arm portion 70 with your fingers, and moving it with the center being in the same direction as the winding radius and passing between the first arm portion 40 and the second arm portion 70.

[0096] Furthermore, when attaching the bolt fall prevention device 10 of the present invention to the end of the bolt, as shown in Figure 3, the second arm portion 70 is brought closer to the first arm portion 40 to form a space surrounded by the first curved region 31A and the second curved region 61A, and the end of the bolt is inserted into this space.

[0097] In other words, when attaching the anti-loosening device 10 of the present invention to a bolt from the side of the bolt, the anti-loosening device 10 of the present invention is brought into contact with the bolt such that the direction in which the virtual winding center axis 21D etc. extends is the same as the direction substantially perpendicular to the longitudinal direction of the bolt. When attaching the anti-loosening device 10 of the present invention to a bolt from the end of the bolt, the anti-loosening device 10 of the present invention is brought into contact with the bolt such that the direction in which the virtual winding center axis 21D etc. extends is the same as the longitudinal direction of the bolt.

[0098] Figure 5 is a schematic diagram showing an example of the state when a fall prevention device to which the present invention is applied is attached to a suspension bolt.

[0099] In the building, a C-shaped steel beam 83 is attached to an H-shaped steel beam 82, extending in a direction approximately perpendicular to the direction in which the H-shaped steel beam 82 extends. The ceiling substructure is then attached to this C-shaped steel beam 83.

[0100] The ceiling substrate is a well-known structure in which a hanger 85 for supporting a ceiling joist is attached to the lower end of a suspension bolt 80 that is suspended from a C-shaped steel 83 via a suspension bolt hanger 84, a ceiling joist support 86 is attached to the ceiling joist support hanger 85, and a ceiling joist 87 for attaching the ceiling board is attached to this ceiling joist support 86.

[0101] C-shaped steel 83 is a steel material with a roughly C-shaped cross-section, composed of a web 83A, an upper flange 83B, a lower flange 83C, an upper lip 83D, and a lower lip 83E. Furthermore, the hanger 84 for the suspension bolt is composed of a rigid plate piece 84A and a horizontal plate piece 84B that extends horizontally from the lower end of the rigid plate piece 84A. Furthermore, the upper end of the rigid plate piece 84A has a downward-facing, roughly U-shaped engagement portion 84C that engages with the lower lip 83E of the C-shaped steel 83, and the horizontal plate piece 84B has a screw hole into which a suspension bolt 80 is screwed.

[0102] Furthermore, the upper end of the suspension bolt 80 is screwed into the screw hole of the horizontal plate piece 84B. Here, the horizontal plate piece 84B is fastened by sandwiching it between two nuts, but the nut above the horizontal plate piece 84B is not shown in the illustration, and only the nut 81 below the horizontal plate piece 84B is illustrated. Furthermore, the engagement portion 84C of the rigid plate piece 84A is engaged with the lower lip 83E of the C-shaped steel 83.

[0103] The joist hanger 85 is composed of a rigid plate piece 85A and a horizontal plate piece 85B that extends horizontally from the upper end of the rigid plate piece 85A. Furthermore, the lower end of the vertical plate piece 85A has an upward-facing, roughly U-shaped engaging portion 85C, and the horizontal plate piece 85B has a screw hole into which a suspension bolt 80 is screwed. The joist hanger 86 is a building material with a roughly C-shaped cross-section, consisting of a web 86A, an upper flange 86B, a lower flange 86C, an upper lip 86D into which the fitting portion 85C of the joist hanger 85 engages, and a lower lip 86E.

[0104] Furthermore, the lower end of the suspension bolt 80 is screwed into the screw hole of the horizontal plate piece 85B. Here, the horizontal plate piece 85B is fastened by sandwiching it between two nuts, but the illustration of the nut below the horizontal plate piece 85B is omitted, and only the nut 81 above the horizontal plate piece 85B is shown. Furthermore, the engagement portion 85C of the rigid plate piece 85A is engaged with the upper lip 86D of the joist support 86.

[0105] If, after constructing a ceiling substrate of this type, it becomes necessary to attach anti-loosening devices to the nuts 81 attached to the suspension bolts 80, conventional anti-loosening devices can only be attached from the end of the suspension bolt 80. Therefore, conventional anti-loosening devices cannot be attached to the nuts 81 below the horizontal plate piece 84B of the suspension bolt hanger 84, or to the nuts 81 above the horizontal plate piece 85B of the joist hanger 85.

[0106] On the other hand, since the fall prevention device 10 of the present invention can be attached to the suspension bolt 80 from the side of the suspension bolt 80, the fall prevention device 10 of the present invention can be attached to the nut 81 below the horizontal plate piece 84B of the suspension bolt hanger 84 and to the nut 81 above the horizontal plate piece 85B of the ceiling joist hanger 85. In other words, the fall prevention device 10 of the present invention can be "implemented later".

[0107] As described above, since the fall prevention device of the present invention is equipped with a coil spring portion, when the second linear region is rotated to approach the first linear region, a biasing force can be generated in the second linear region in a direction away from the first linear region.

[0108] Furthermore, since the fall prevention device of the present invention is equipped with a first hooking portion and a second hooking portion, when the second linear region is brought close to the first linear region, the first curved region of the first hooking portion and the second curved region of the second hooking portion intersect in three dimensions, forming a space enclosed by the first curved region and the second curved region.

[0109] Furthermore, since the anti-drop device of the present invention is equipped with a nut-compatible portion and a second hook portion, when the second linear region is brought closer to the first linear region to form a space enclosed by the first curved region and the second curved region, the bolt opening in the second curved region and the space between one end and the other end of the fourth coil wire both face the same side with respect to the first or second virtual curvature center axis, and furthermore, both the second hook portion and the nut-compatible portion can be positioned on the same side with respect to the longitudinal direction of the bolt. As a result, when the anti-drop device of the present invention is rotated by approximately 90 degrees with the rotation center being the same direction as the winding radius direction of the coil spring portion and passing between the first arm portion and the second arm portion, the second hook portion and the nut corresponding portion are brought together with the bolt from the side of the bolt, and the bolt can be positioned within the second hook portion, i.e., within the second curved region, and within the nut corresponding portion, i.e., within the region surrounded by the fourth coil strand.

[0110] Therefore, the anti-detachment device of the present invention can be attached to the bolt from either the end or the side. [Explanation of symbols]

[0111] 10 Fall prevention device 20 Coil spring section 21 First coil strand 21A First linear region 21B Winding region 21C Second linear region 21D Virtual winding center axis 30 First hook 31. Second coil strand 31A First curved region 31B First center of curvature 31C First virtual curvature center axis 40 First arm section 41 Third coil strand 41A Main domain 41B Other main regions 41C Concatenation area 50 Nut compatible section 51. Fourth coil strand 51A Top 51B One end 51C Other end 52 Nut opening 60 Second hook 61. Fifth coil strand 61A Second curved region 61B Second center of curvature 61C Second virtual curvature center axis 61D One end 61E Other end 62 bolt opening 70 Second arm section 71. The sixth coil strand 71A Main area 71B End area 72 Receptive Space 80 Suspension bolts 80A screw thread 80B screw thread 81 Nut 82 H-shaped steel 83 C-shaped steel 83A Web 83B Upper flange 83C Lower flange 83D Upper Lip 83E Lower Lip 84 Hanger for suspension bolts 84A Hardboard piece 84B Horizontal plate piece 84C Engagement part 85 Hanger for ceiling joists 85A hardboard piece 85B Horizontal plate piece 85C Engagement part 86. Ceiling joist support 86A Web 86B Upper flange 86C Lower flange 86D Upper Lip 86E Lower Lip 87. veranda A. Direction of pressure Q: Angle of crossing a grade.

Claims

1. A coil spring portion having a first coil wire that includes a first linear region extending in a substantially straight line, a winding region wound multiple times in a substantially circular shape with substantially the same diameter from the first linear region, and a second linear region extending substantially in a straight line from the winding region and positioned to intersect the first linear region in three dimensions, A first hooking portion is connected to the first linear region of the first coil strand, and the second coil strand includes a first curved region that is convexly curved in the same direction as the winding radius direction of the winding region of the first coil strand from the connection point with the first coil strand, A first arm portion is connected to the second coil wire and has a third coil wire extending from the connection point with the second coil wire in the same direction as the winding radius direction of the winding region of the first coil wire, A nut-compatible portion having a fourth coil wire connected to the third coil wire, extending from the connection point with the third coil wire in a virtual plane that extends in the same direction as the winding radius direction of the winding region, forming at least one vertex on the opposite side of the curvature direction of the first curved region, and having one end connected to the third coil wire and the other end on the opposite side of that end spaced apart from each other by a predetermined distance, The second linear region is connected to the second linear region, and the fifth coil strand has a second curved region that is convexly curved from the connection point with the second linear region in a direction that intersects the first hook portion with the first hook portion at a radius of curvature approximately the same as the radius of curvature of the first hook portion, and the second hook portion is positioned between the first hook portion and the nut corresponding portion in the same direction as the direction approximately perpendicular to the winding radius direction of the winding region, The second arm portion is connected to the fifth coil strand and has a sixth coil strand extending from the connection point with the fifth coil strand in the same direction as the winding radius direction of the winding region, The fourth coil strand in the nut-compatible portion is bent, forming a shape that is a hexagon with a portion missing and has four sides. Fall-off prevention device.

2. The angle of spatial intersection between the first linear region and the second linear region of the coil spring portion is less than 180 degrees. The fall prevention device according to claim 1.

3. The third coil strand of the first arm portion includes a main region connected to the second coil strand and extending from the connection point with the second coil strand in the same direction as the winding radius direction of the winding region, a connecting region extending from the first main region in the same direction as a direction substantially perpendicular to the winding radius direction of the winding region, and another main region extending from the connecting region substantially parallel to the first main region and connected to the fourth coil strand. The sixth coil strand of the second arm portion includes an end region that extends from the opposite side of the point of connection with the fifth coil strand in the same direction as substantially perpendicular to the winding radius direction of the winding region, and toward the virtual plane where the fourth coil strand of the nut corresponding portion is arranged. The fall prevention device according to claim 1 or claim 2.

4. The end region of the sixth coil strand further extends toward the main region, which is the region of the sixth coil strand extending in the same direction as the winding radius direction of the winding region. The fall prevention device according to claim 3.

5. The connecting region of the third coil strand extends in a convex curve from the connection point of the third coil strand with the second coil strand toward the opposite side of the connection point, The end region of the sixth coil strand extends in a convex curve from the connection point of the sixth coil strand with the fifth coil strand toward the opposite side of the connection point. The fall prevention device according to claim 3 or claim 4.

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