WO2017043402A1 - Anti-toppling device - Google Patents

Abstract

Provided is an anti-toppling device that can easily be installed between the top surface of an article and a ceiling. This anti-toppling device is provided with a damper (10), a pair of base portions (30A, 30B), and a fixing cord (90). The damper (10) is mounted between the top surface of a piece of furniture (F) installed on a floor and a ceiling (C). The base portions (30A, 30B) are connected to the end portions of the damper (10). The first base portion (30A) is in contact with the top surface of the piece of furniture (F), and the second base portion (30B) is in contact with the ceiling (C). The fixing cord (90) holds the damper (10) in a contracted state at a desired length.

Description

Fall prevention device

The present invention relates to a fall prevention device.

Patent Document 1 discloses a conventional fall prevention device. This overturn prevention device includes a damper and a pair of bases. The damper is attached between the upper surface of the furniture installed on the floor and the ceiling. The pair of base portions pivotally support each of both end portions of the damper so as to be rotatable around a rotation axis. One base part contacts the upper surface of the furniture, and the other base part contacts the ceiling. For this reason, when the furniture is tilted in a direction parallel to the rotation direction of the damper due to a shake such as an earthquake, the fall prevention device rotates the damper around the rotation axis with respect to each base portion. The state which contact | abutted to the upper surface and ceiling of furniture can be maintained. Therefore, this fall prevention apparatus can make the damping force of a damper act on furniture, can suppress the inclination of furniture, and can prevent the fall of furniture.

Japanese Patent Laying-Open No. 2015-6330

However, when the fall prevention device of Patent Document 1 is installed between the upper surface of the furniture and the ceiling, it is contracted against the expansion force of the compressed gas acting in the extension direction of the damper, and a desired installation posture (for example, a damper). So that the desired inclination angle is obtained), the pair of base portions must be brought into contact with the upper surface of the furniture and the ceiling. As described above, it is difficult for the worker to attach the damper to the desired attachment posture while contracting the damper above the furniture.

The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a fall prevention device that can be easily attached between the upper surface of an article and a ceiling.

The fall prevention device of the present invention includes a damper, a pair of base portions, and a fixed cable. The damper is attached between the upper surface of the article installed on the installation surface and the ceiling. Each base portion is connected to each of both end portions of the damper. Also, one base part contacts the upper surface of the article, and the other base part contacts the ceiling. The fixed line holds the damper in the contracted state of the desired length.

This fall-preventing device places one base part in contact with the upper surface of the article while the fixed cable holds the damper in a contracted state of a desired length. And after positioning a damper so that it may be in the attachment state extended in the desired direction, a fixed line is unwound or cut | disconnected. Then, the damper extends and the other base portion comes into contact with the ceiling, and the mounting operation can be completed. Thus, the fall prevention device does not need to be attached while the operator contracts the damper above the article, so that it can be easily attached between the top surface of the article and the ceiling.

Therefore, the fall prevention device of the present invention can be easily attached between the upper surface of the article and the ceiling.

In addition, this fall prevention device can reduce the impact of the other base portion coming into contact with the ceiling by reducing the extension of the damper when the other base portion comes into contact with the ceiling from the state contracted by the fixed cable. it can. For this reason, according to the distance between the top surface of the article and the ceiling, a plurality of types of fall prevention devices having different cylinder and rod lengths of the damper are prepared. For the same length, it is better to prepare multiple types of dampers with different damper contraction lengths.

Each base portion of the fall prevention device of the present invention may include a rotation shaft member that pivotally supports each of both end portions of the damper. And a fixed line can be latched by each rotating shaft member. In this case, the fall prevention device uses the rotary shaft members positioned at both ends of the damper without providing a structure only for locking the fixed cable, and holds the damper in a contracted state of a desired length. can do.

In the overturn prevention device of the present invention, each rotating shaft member can be exposed from each base portion at a position where both end portions are symmetrical with respect to the central axis of the damper. In addition, the fixed cable can be engaged with both ends of the rotating shaft member exposed from each base portion on both sides, and can be stretched together at the central portion. In this case, since the fixed cords locked to the both end portions of the rotating shaft member at both ends extend together at the central portion, the damper can be held in a contracted state with a good balance.

The fall prevention device of the present invention may include an angle restricting portion. The angle restricting portion is attached to the base portion that contacts the upper surface of the article, and restricts the inclination angle of the damper. In this case, when the fall prevention device is placed with the base portion in contact with the upper surface of the article, the damper is arranged at a desired inclination angle by the angle regulating portion. Then, if the fixed cable is unwound or cut in this state, the fall prevention device can attach the damper between the upper surface of the article and the ceiling at a desired inclination angle.

Here, the articles are furniture, a bed in which a plurality of beds are connected in the vertical direction, a large television (television), a refrigerator, a book shelf, a showcase, a server rack, a server rack, etc. This includes things that may fall over.

The fixed rope of the fall prevention device of the present invention may include a gripping part connected to the base part that comes into contact with the ceiling, and an article-side connection part that connects the base part that comes into contact with the upper surface of the article and the gripping part. When this fall prevention device is installed, it is placed between the ceiling and the article by placing it on the upper surface of the article when it is in a contracted state by a fixed rope, and breaking or cutting the connecting part on the article side. Can be attached. And in this attachment state, it arrange | positions so that the holding part connected with the base part contact | abutted to a ceiling may hang down from the base part. The operator can separate the base portion from the ceiling against the biasing force of the damper by pulling the grip portion downward. Thus, even after the base portion comes into contact with the ceiling, the operation of moving the base portion away from the ceiling is facilitated, so that the position of the base portion can be changed more easily.

The fall prevention device of the present invention may be configured in a predetermined direction indicating shape in which at least a part of the gripping part indicates the arrangement side of either the base part contacting the ceiling or the base part contacting the upper surface of the article. In this way, if at least a part of the shape of the gripping part is configured in a predetermined direction indicating shape, the operator can more easily grasp the mounting direction of the fixed rope. For example, it is possible to reduce mistakes that the fixed cable is attached upside down when the fixed cable is attached to both base portions. Moreover, when attaching both base parts to which the fixed cable is attached to the article and the ceiling, the base part to be on the ceiling side or the base part to be on the article side is attached by checking the direction indicating shape shown on the gripping part. be able to. Therefore, the mistake that the base part on the article side and the base part on the ceiling side are attached in reverse can be reduced.

The fixed rope of the fall prevention device of the present invention may include a ceiling-side connecting portion that connects the base portion that contacts the ceiling and the grip portion. And the connection part by the side of a ceiling can take the structure thicker than the connection part by the side of goods. If the ceiling-side connection part is thicker than the article-side connection part, the strength of the ceiling-side connection part can be increased, and the article-side connection part can be easily cut. When the strength of the connection part on the ceiling side is increased, when the base part is attached to the ceiling, when the base part is separated from the ceiling by pulling the grip part downward, strong force is applied between the grip part and the base part. Even if is added, breakage or the like hardly occurs.

The fixed rope of the fall prevention device of the present invention may include a fixed portion attached to the base portion that contacts the ceiling, and a first mark portion formed at a position away from the fixed portion. The first mark portion indicates a position of a predetermined portion of the damper in a state where at least a portion from the fixed portion to the first mark portion hangs down from the base portion contacting the ceiling when the damper has a predetermined maximum length. It can be a configuration. According to this configuration, it is possible to easily grasp the positional relationship between the first mark portion and the predetermined portion of the damper after the both base portions are attached to the article side and the ceiling side by releasing the fixed rope. Thereby, it can be easily confirmed whether or not the length of the damper in the mounted state is within a predetermined maximum length. For example, if the first mark portion formed on the fixed rope hanging from the base portion that comes into contact with the ceiling after the attachment of both base portions is located above a predetermined portion of the damper, the length of the damper is predetermined. You can see that the maximum length is exceeded. On the contrary, if the first mark portion formed on the fixed rope hanging from the base portion in contact with the ceiling is at a position below the predetermined portion of the damper, the length of the damper is within the predetermined maximum length. It can be confirmed that it is in place.

The fixed cable of the fall prevention device of the present invention may include a second mark portion formed at a position different from the first mark portion. The second mark portion indicates a position of a predetermined portion of the damper in a state where at least a portion from the fixing portion to the second mark portion hangs down from the base portion contacting the ceiling when the damper has a predetermined minimum length. It can be a configuration. According to this configuration, after the both base portions are attached to the article side and the ceiling side by releasing the fixed rope, if the positional relationship between the second mark portion and the predetermined portion of the damper is grasped, the length of the damper is predetermined. It can be easily confirmed whether or not it is longer than the minimum length. For example, if the second mark portion formed on the fixed rope hanging from the base portion that comes into contact with the ceiling after the attachment of both base portions is at a position above a predetermined portion of the damper, the length of the damper is predetermined. It can be confirmed that it is longer than the minimum length. On the other hand, if the second mark formed on the fixed rope hanging from the base portion in contact with the ceiling is located below the predetermined portion of the damper, the length of the damper reaches the predetermined minimum length. I can grasp that it is not.

In the fixed rope of the fall prevention device of the present invention, the position of the first mark portion may be the cutting position. According to this configuration, the cutting position can be clearly indicated to the worker who performs the mounting work. And, in the mounted state after cutting, the length of the damper is within a predetermined maximum length by grasping the positional relationship between the lower end portion of the fixed rope hanging from the base portion contacting the ceiling and the predetermined portion of the damper. Therefore, it is possible to confirm the operation more accurately and easily.

The fixing cable of the fall prevention device of the present invention may be formed with holes penetrating at a position near one base portion and a position near the other base portion. When this fall prevention device is installed, it is placed on the upper surface of the article when it is in a contracted state by the fixed cable, and the hole between the two holes of the fixed cable is unraveled or cut between the ceiling and the article. Easy to install. After releasing the contracted state by the fixed cable in this way and extending the damper, if it becomes necessary to hold the damper in the contracted state again, between the holes, a wire (wire), string, etc. The damper can be maintained in the contracted state again by connecting with the connecting member.

It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 1 between the upper surface of furniture, and the ceiling. It is a front view which shows the state which attached the fall prevention apparatus of Embodiment 1 between the upper surface of furniture, and the ceiling. It is a fragmentary sectional view showing the damper and the 1st base part of the fall prevention device of Embodiment 1. It is a perspective view which shows the damper, 1st base part, and fall prevention part of the fall prevention apparatus of Embodiment 1. FIG. It is a fragmentary sectional view showing the damper of Embodiment 1, the 1st base part, and a fall prevention part. It is a fragmentary sectional view which shows the damper of the fall prevention apparatus of Embodiment 1, a 1st base part, and an angle control part. It is a fall prevention device of Embodiment 1, and is a back view showing the state held by the fixed line in the contracted state. It is a side view which shows the middle process of attaching the fall prevention apparatus of Embodiment 1 between the upper surface of furniture, and a ceiling. It is a side view which shows the state which the fall prevention part of the fall prevention apparatus of Embodiment 1 was hooked on the wall surface. It is a perspective view which shows roughly the middle process of attaching the fall prevention apparatus of Embodiment 2 between the upper surface of furniture, and a ceiling. It is a top view which shows the band member which comprises the holding part of the fall prevention apparatus of Embodiment 2. FIG. It is a perspective view which shows roughly the state which attached the fall prevention apparatus of Embodiment 2 between the upper surface of furniture, and the ceiling. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 2 between the upper surface of furniture, and the ceiling. It is a side view which shows the middle process of attaching the fall prevention apparatus of Embodiment 3 between the upper surface of furniture, and a ceiling. It is a perspective view which shows the fixed cable of the fall prevention apparatus of Embodiment 3. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 3 between the upper surface of furniture, and the ceiling. It is a partial cross section schematic diagram which shows the structure of the holding part and 2nd base part vicinity in the state which attached the fall prevention apparatus of Embodiment 3 between the upper surface and ceiling of furniture. It is a partial cross section schematic diagram which shows the structure of the holding part and 1st base vicinity in the state which attached the fall prevention apparatus of Embodiment 3 between the upper surface and ceiling of furniture. It is a side view which shows the middle process of attaching the fall prevention apparatus of Embodiment 4 between the upper surface of furniture, and a ceiling. It is a perspective view which shows the fixed cable of the fall prevention apparatus of Embodiment 4. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 4 between the upper surface of furniture, and the ceiling. It is a partial cross section schematic diagram which shows the structure of the holding part and 2nd base part vicinity in the state which attached the fall prevention apparatus of Embodiment 4 between the upper surface and the ceiling of furniture. It is explanatory drawing which illustrates roughly the internal structure of a damper. It is a side view which shows the middle process of attaching the fall prevention apparatus of Embodiment 5 between the upper surface of furniture, and a ceiling. It is a perspective view which shows the fixed cable of the fall prevention apparatus of Embodiment 5. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 5 between the upper surface of furniture, and the ceiling. It is a side view which shows the middle process of attaching the fall prevention apparatus of Embodiment 6 between the upper surface of furniture, and a ceiling. It is a perspective view which shows the fixed cable of the fall prevention apparatus of Embodiment 6. FIG. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 6 between the upper surface of furniture, and the ceiling. It is a partial cross section schematic diagram which shows the structure of the holding part and 2nd base part vicinity in the state which attached the fall prevention apparatus of Embodiment 6 between the upper surface and ceiling of furniture. It is a side view which shows the state which attached the fall prevention apparatus of Embodiment 7 between the upper surface of furniture, and the ceiling. It is a perspective view which shows the fixed cable of the fall prevention apparatus of Embodiment 7.

Embodiment 1 that embodies the fall prevention device of the present invention will be described with reference to the drawings.

<Embodiment 1>
As shown in FIG. 1, at least one or more fall prevention devices of Embodiment 1 are attached between the upper surface of the furniture F and the ceiling C. The furniture F is installed on the floor surface with the back surface facing a wall surface W extending vertically from a floor surface (not shown). The furniture F has a rectangular parallelepiped shape, and has a door, a drawer, etc. (not shown) on the front (right side in FIG. 1), and can store clothes, accessories, and the like inside. The furniture F has a rectangular shape in which the horizontal cross-sectional shape is long in the left-right direction (the depth direction in FIG. 1). When the fall prevention device is not attached, the furniture F may be tilted forward (rightward in FIG. 1) due to shaking such as an earthquake.

As shown in FIGS. 1 and 2, the overturn prevention device includes a damper 10, a pair of base portions 30 </ b> A and 30 </ b> B, a fall prevention portion 50, and an angle restriction portion 70. Furthermore, the fall prevention device includes a fixed cable 90 as shown in FIG.

The damper 10 has a cylinder 11, a rod guide (not shown), a piston (not shown), a rod 13, and two joints 15 provided at both ends. The cylinder 11 has a bottomed cylindrical shape. The rod guide seals the opening of the cylinder 11. The piston is slidably inserted into the cylinder 11. The rod 13 has a base end connected to the piston. Further, the rod 13 is inserted through the rod guide, and the tip side protrudes to the outside of the cylinder 11. The cylinder 11 encloses hydraulic oil and compressed gas. As shown in FIGS. 1 to 3, each joint portion 15 is formed by bending a flat metal fitting. Each joint portion 15 is connected to the bottom of the cylinder 11 and the tip of the rod 13. Each joint portion 15 is formed with a through hole 15 </ b> A penetrating in a direction orthogonal to the axis of the damper 10.

The damper 10 is a pressure damper in which the damping force generated during the extension operation is smaller than the damping force generated during the contraction operation. Here, the extension operation of the damper 10 means an operation in which the protruding length of the rod 13 from the cylinder 11 and the length of the damper 10 become longer. The contraction operation of the damper 10 means an operation in which the protruding length of the rod 13 from the cylinder 11 and the length of the damper 10 become shorter. Further, in the damper 10, the expansion force of the compressed gas sealed in the cylinder 11 works in the extending direction.

The mechanism (mechanism) in which the damping force of the damper 10 is generated is a well-known structure, and will not be described. The cylinder 11 is partitioned into a rod-side pressure chamber in which the base end portion of the rod 13 is housed and an anti-rod-side pressure chamber by a piston inside. The piston is formed with an orifice which is a throttle valve for communicating between the two pressure chambers. The orifice functions as a damping force generator that generates a damping force by applying resistance to the flow of hydraulic oil between the rod-side pressure chamber and the non-rod-side pressure chamber accompanying the expansion / contraction operation of the damper 10. Further, the piston is formed with a communication passage that communicates between the pressure chambers via a check valve. The check valve allows the flow of hydraulic oil from the rod side pressure chamber to the anti rod side pressure chamber, and prevents the reverse flow. For this reason, when the damper 10 is extended, the flow path of the hydraulic oil from the rod-side pressure chamber to the anti-rod-side pressure chamber becomes a path between the orifice and the communication path. On the other hand, in the damper 10, during the contracting operation, the flow path of the hydraulic oil from the non-rod side pressure chamber to the rod side pressure chamber is only the orifice. For this reason, the damping force generated during the extension operation of the damper 10 is smaller than the damping force generated during the contraction operation.

As shown in FIGS. 1 and 2, the pair of base portions 30 </ b> A and 30 </ b> B is a first base portion 30 </ b> A that connects the joint portion 15 connected to the bottom portion of the cylinder 11, and is connected to the distal end portion of the rod 13. This is a second base portion 30B to which the joint portion 15 is connected. The first base portion 30A is placed in contact with the upper surface of the furniture F, and the second base portion 30B is in contact with the ceiling C. The first base portion 30A and the second base portion 30B have the same form and structure. As shown in FIGS. 1 to 4, each of the base portions 30A and 30B includes a base portion main body 31, a bolt 45 and a nut 47 that are rotating shaft members, a bush 35, and an anti-slip member. A portion 37 is provided.

In a plan view when the first base portion 30A is viewed from above in a state of being placed in contact with the upper surface of the furniture F, the base portion main body 31 has a rectangular outer shape (hereinafter, the base portion main body 31 in the plan view). The direction in which the long side extends in the outer shape is referred to as “long side direction”, and the direction in which the short side extends is referred to as “short side direction”. Further, in a side view of the first base portion 30 </ b> A viewed in the short side direction in a state in which the first base portion 30 </ b> A is placed in contact with the upper surface of the furniture F, the lower end edge of the base body 31 is linearly parallel to the upper surface of the furniture F The upper end edge has an arcuate outer shape that swells upward from both sides of the lower end edge (see FIG. 1). Further, the base body 31 has a substantially trapezoidal outer shape in which the upper end edge is shorter than the lower end edge in a side view of the first base part 30A viewed in the long side direction in a state of being placed in contact with the upper surface of the furniture F. (See FIGS. 2 and 3).

In the first base portion 30A in a state of being placed in contact with the upper surface of the furniture F, the base portion main body 31 is in the long side direction (the left-right direction in FIG. 1 and the depth direction in FIGS. 2 and 3) on the upper surface. An elongated groove 41 is formed. In the groove portion 41, the bottom surface 41A extends on a horizontal plane, and the inner wall surface 41B rises in a substantially vertical direction on both sides of the bottom surface 41A. The bottom surface 41 </ b> A of the groove portion 41 extends substantially at the center in the vertical direction of the base portion main body 31. Further, the bottom surface 41A of the groove portion 41 is formed to have a constant width except for a portion where a pair of convex portions 43, 43 described later is formed.

As shown in FIG. 4, the groove portion 41 is formed with a pair of convex portions 43 and 43 protruding from the bottom surface 41 </ b> A of the groove portion 41 and both inner wall surfaces 41 </ b> B and 41 </ b> B at the central portion in the long side direction. As shown in FIGS. 2 and 3, the convex portions 43 and 43 are formed with spaces in which the joint portion 15 of the damper 10 and a bush 35 described later are fitted. This space communicates with the groove 41. The distance between the inner wall surfaces 43A, 43A of the pair of convex portions 43, 43 (the length in the short side direction of the space) is slightly larger than the length of the bush 35 described later. Further, the pair of convex portions 43, 43 has an insertion hole 43B through which a shaft portion 45B of a bolt 45 (described later) is inserted in the upper center in the short side direction.

As shown in FIG. 4, the groove portion 41 has a pair of locked holes 49 formed on the bottom surface 41 </ b> A. The locked holes 49 are formed at substantially equal distances from the convex portion 43 toward both ends of the groove portion 41. The locked hole 49 has a slit shape extending over the entire width of the groove 41. That is, the length of the locked hole 49 is equal to the width dimension of the groove portion 41, and the width of the locking portion 51 </ b> A of the fall prevention portion 50, which will be described later, and the insertion portion 71 </ b> B provided in the angle regulating portion 70. Slightly larger than thickness. One locked hole 49 is a locked portion into which a locking portion 51 </ b> A of a fall prevention portion 50 described later is inserted and locked. The other locked hole 49 is a locked portion into which an insertion portion 71B provided in an angle regulating portion 70 described later is inserted and locked.

In the first base portion 30 </ b> A in a state of being placed in contact with the upper surface of the furniture F, the base portion main body 31 is a central portion in the long side direction, and recessed portions 42 are formed on both sides of the groove portion 41. . The recess 42 is open outward in the upward direction and the short side direction. Further, the recess 42 has an insertion hole 43 </ b> B penetrating the convex portion 43 opened on the side surface. The recess 42 is provided with a head 45A of a bolt 45, which will be described later, and a nut 47 screwed into the bolt 45. The recess 42 is formed so as to spread upward in the long side direction so that the tool can be fitted to the head 45A and the nut 47 of the bolt 45 from above.

The base body 31 is hollow as shown in FIGS. The base portion main body 31 opens downward in the first base portion 30A in a state where it is placed in contact with the upper surface of the furniture F. The base portion main body 31 is formed by intersecting a plurality of ribs R1 extending in parallel in the short side direction and two ribs R2 extending in parallel in the long side direction.

As shown in FIGS. 2 and 3, the rotating shaft member includes a bolt 45 inserted from one of the insertion holes 43 </ b> B of the base body 31 and a nut 47 screwed into the shaft 45 </ b> B of the bolt 45. Has been. The central axis of the bolt 45 becomes the rotation axis of the damper 10 in each base portion 30A, 30B.

The bush 35 is substantially cylindrical as shown in FIG. The bush 35 is an elastic body. The length of the bush 35 is slightly smaller than the distance between the inner wall surfaces 43 </ b> A and 43 </ b> A of the pair of convex portions 43 and 43 provided on the base body 31. The bush 35 is formed with a recess 35 </ b> A that goes around the outer peripheral surface of the central portion. The outer diameter of the recess 35 </ b> A is substantially equal to the inner diameter of the through hole 15 </ b> A formed in the joint portion 15 of the damper 10. The outer diameter of the portion of the bush 35 rising from both ends of the recess 35 </ b> A is larger than the inner diameter of the through hole 15 </ b> A formed in the joint portion 15 of the damper 10. Moreover, the outer peripheral surface 35B of both ends is reducing the diameter of the bush 35 in the outward direction. For this reason, the bush 35 is inserted into the through hole 15 </ b> A formed in the joint portion 15 of the damper 10 while being elastically deformed. The bush 35 is attached to the joint portion 15 of the damper 10 with the recess 35A fitted in the through hole 15A.

The inner diameter of the bush 35 is slightly larger than the outer diameter of the shaft part 45B of the bolt 45. Further, the bush 35 has inner peripheral surfaces 35C at both ends that are expanded in the outward direction. For this reason, the bush 35 is rotatable around the shaft portion 45 </ b> B of the bolt 45. Further, the bush 35 can be inclined with respect to the shaft portion 45B of the bolt 45 as long as the inner peripheral surfaces 35C of both end portions whose diameters have been expanded come into contact with the outer peripheral surface of the shaft portion 45B of the bolt 45. That is, the damper 10 having the bush 35 attached to the joint portion 15 is rotatable around the shaft portion 45B of the bolt 45 and is swingable in a direction crossing the rotation direction. Specifically, the rocking occurs due to the dimensional allowance and the diameter increase of the inner peripheral surface 35C. Furthermore, the elastic deformation of the bush 35 allows the damper 10 to swing more greatly in the direction crossing the rotational direction.

As shown in FIGS. 1 to 4, the anti-slip portion 37 has a similar (rectangular) outer shape slightly larger than the outer shape of the base portion main body 31. The non-slip portion 37 is made of rubber. Further, the anti-slip portion 37 is fitted into the lower end opening of the base portion main body 31 in the first base portion 30 </ b> A in a state of being placed in contact with the upper surface of the furniture F. Moreover, the anti-slip | skid part 37 is a substantially flat plate. Specifically, the anti-slip portion 37 has a flat surface that contacts the top surface of the furniture F or the ceiling C, and the surface facing the opposite side (the surface facing the base portion main body 31) is the outer periphery of the base portion main body 31. Fitting grooves that match the walls and the ribs R1 and R2 are formed. The anti-slip portion 37 is detachably attached to the base portion main body 31 by its elastic force.

Here, the assembly process of the damper 10 and each base part 30A, 30B is demonstrated.

First, the bush 35 is fitted into each through hole 15 </ b> A formed in the two joint portions 15 provided at both ends of the damper 10, and the bush 35 is attached to the joint portion 15 of the damper 10.
Next, one of the joint portions 15 of the damper 10 to which the bush 35 is attached is inserted between the pair of convex portions 43 and 43 formed on the base portion main body 31. Then, the shaft portion 45B of the bolt 45 is inserted into the insertion hole 43B and the bush 35 of the base portion main body 31, and the nut 47 is screwed into the shaft portion 45B of the bolt 45. In this way, the base portion main body 31 is connected to one of the joint portions 15 of the damper 10. Similarly, the base portion main body 31 is connected to the other joint portion 15 of the damper 10. In this state, as shown in FIG. 2, the head 45 </ b> A and the nut 47 (both ends of the rotating shaft member) of the bolt 45 are symmetric with respect to the central axis of the damper 10 in the recess 42 of the base body 31. Exposed.
And the anti-slip | skid part 37 is fitted to each base part main body 31 connected with the both ends of the damper 10, and the assembly | attachment process of the damper 10 and each base part 30A, 30B is complete | finished.

As shown in FIG. 3, the damper 10 and the base portions 30 </ b> A and 30 </ b> B assembled in this way have a bush 35 that can rotate with respect to the shaft portion 45 </ b> B of the bolt 45. For this reason, each base part 30A, 30B has connected each of the both ends of the damper 10 so that rotation around the rotating shaft is possible. Further, the bush 35 has inner peripheral surfaces 35C at both end portions that are expanded in the outward direction. For this reason, the bush 35 can be tilted with respect to the rotation shaft in a range in which the inner peripheral surfaces 35C of both end portions of the bush 35 whose diameters are expanded are in contact with the outer peripheral surface of the shaft portion 45B of the bolt 45. Specifically, the rocking occurs due to the dimensional allowance and the diameter increase of the inner peripheral surface 35C. Further, the bush 35 is an elastic body, and the damper 10 can swing more greatly in the direction intersecting the rotation direction by being elastically deformed. As described above, the damper 10 connected to each of the base portions 30A and 30B can swing in a direction crossing the rotation direction.

As shown in FIGS. 1, 4, and 5, the fall prevention unit 50 is formed by bending a plate-shaped metal or by resin. The fall prevention part 50 is slightly narrower than the width of the groove part 41 formed in the base part body 31, and is constant. That is, the width of the fall prevention part 50 is slightly narrower than the length of the slit-shaped locked hole 49 formed in the base part main body 31. The fall prevention unit 50 includes a connecting part 51 and a hanging part 53. The connecting part 51 of the fall prevention part 50 has a locking part 51A formed by bending one end part at a right angle. The hanging part 53 of the fall prevention part 50 is continuous with the other end of the connecting part 51, is orthogonal to the connecting part 51, and extends in the same direction as the locking part 51A. The hanging portion 53 of the fall prevention unit 50 is set to a length that does not come out between the wall surface W and the back of the furniture F when the upper side of the fall prevention device falls in a direction away from the wall surface W as will be described later. Has been. For example, the hanging part 53 of the fall prevention part 50 has a length of 100 mm or more below the anti-slip part 37.

The fall prevention part 50 is attached to the first base part 30A placed in contact with the upper surface of the furniture F as shown in FIGS. Specifically, the fall prevention part 50 is located on the wall surface W side of the base part main body 31 of the first base part 30A in a state where the locking part 51A of the coupling part 51 is placed in contact with the upper surface of the furniture F. It is inserted into the locked hole 49 and locked. Thus, this fall prevention device can easily attach the fall prevention part 50 to the first base part 30A. Moreover, this fall prevention device can remove the fall prevention part 50 from the 1st base part 30A at the time of packing etc., and can prevent it from becoming bulky.

The connecting portion 51 of the fall prevention portion 50 is attached to the base portion main body 31 of the first base portion 30A and extends along the groove portion 41 formed in the base portion main body 31, and the other end is the first base. It is located outside the outer edge of the portion 30A (the outer edge of the anti-slip portion 37 of the first base portion 30A). The hanging portion 53 hangs from the other end of the connecting portion 51 and extends slightly outward from the outer edge of the anti-slip portion 37 of the first base portion 30A. The fall prevention unit 50 is disposed between the wall surface W and the back surface of the furniture F below the first base unit 30A.

The angle restricting portion 70 is detachably attached to the first base portion 30A placed in contact with the upper surface of the furniture F as shown in FIGS. 1, 2, and 6. For this reason, this fall prevention device can remove the angle control part 70 from the 1st base part 30A at the time of packing, etc., and can prevent it from becoming bulky. The angle restricting portion 70 is attached to the first base portion 30 </ b> A, and is provided continuously to the restricting portion 71 extending in the substantially vertical direction and the lower portion of the restricting portion 71, and supports the tilting of the restricting portion 71. Part 73. The restricting portion 71 is a flat plate and has a substantially rectangular shape. The restricting portion 71 is a receiving portion 71A whose one short side is positioned at the upper end when the angle restricting portion 70 is attached to the first base portion 30A in a state of being placed in contact with the upper surface of the furniture F, and the other This is an insertion portion 71 </ b> B that is inserted into the locked hole 49 located on the side away from the wall surface W of the base portion main body 31.

The regulating unit 71 regulates the damper 10 so that it does not fall down from its inclined posture when the cylinder 11 of the damper 10 comes into contact with the receiving unit 71A. The inclination angle of the damper 10 is preferably 15 ° to 25 °. 71 A of receiving parts are open | released upwards, and the center is dented and curved so that about 1/3 of the outer periphery of the cylinder 11 may contact | abut. In this way, since the receiving portion 71A does not hold the cylinder 11 firmly, the receiving portion 71A does not restrain the movement of the damper 10 that occurs when the furniture F tilts or shakes due to shaking such as an earthquake. That is, in this fall prevention device, when the furniture F is shaken or tilted due to a shake such as an earthquake, the damper 10 is rotatable around the rotation axis with respect to the base portions 30A and 30B. It can swing in a direction that intersects the direction.

As shown in FIG. 6, the insertion portion 71 </ b> B has inclined surfaces 71 </ b> C and 71 </ b> C in which corners on both sides of the short side are cut out in the long side direction so as to become thinner toward the tip. By the inclined surfaces 71 </ b> C and 71 </ b> C, the insertion portion 71 </ b> B is easily inserted into the locked hole 49 of the base portion main body 31. Further, the insertion portion 71B has a protrusion 71D protruding in the short side direction from one surface of the tip portion. Although the angle restricting portion 70 is detachable from the first base portion 30A, the force is applied to the angle restricting portion 70 in a direction in which the insertion portion 71B is unintentionally pulled out from the locked hole 49 of the base portion main body 31. When it works, the projection 71D is caught in the locked hole 49 and is difficult to be pulled out.

The support portion 73 includes a first support portion 73A and a second support portion 73B. The first support portion 73 </ b> A is a flat plate that has the same width as the restricting portion 71 and extends in a direction perpendicular to the restricting portion 71. 73 A of 1st support parts are the bottom surfaces of the groove part 41 formed in the base part main body 31, if the insertion part 71B of the control part 71 is inserted in the to-be-latched hole 49 of the base part main body 31 of 30 A of 1st base parts. It will be in the state contact | abutted to 41A. The second support portion 73B is a right-angled isosceles triangular flat plate connected to a corner portion between the first support portion 73A and the restricting portion 71. Specifically, in the second support portion 73B, two sides having the same length are connected to the side surface of the first support portion 73A and the side surface of the restriction portion 71, and the first support portion 73A and the restriction portion 71 are orthogonal to each other. I support it to become.

As shown in FIG. 7, the overturn prevention device includes a fixed line 90 that holds the damper 10 in a contracted state with a desired length. The fixed rope 90 is a single string made of chemical fiber. The fixed rope 90 is hooked on the head 45A of the bolt 45 and the nut 47 of the first base portion 30A and the second base portion 30B so that the damper 10 is contracted and a ring is formed on both sides. That is, the fixed rope 90 is engaged with the head 45A and the nut 47 of the bolt 45 of the first base portion 30A and the second base portion 30B on both sides, and extends together at the center portion.

As described above, this fall prevention device uses the heads 45A and the nuts 47 of the bolts 45 located at both ends of the damper 10 without providing a structure only for locking the fixed rope 90, and the damper 10 It can be kept in a contracted state of a desired length. Moreover, this fall prevention apparatus can hold | maintain in the contracted state from which the contraction length of the damper 10 differs by adjusting the length of a string. For this reason, even if the cylinder 11 and the rod 13 have the same length, a plurality of types of shrinkage with different shrinkage lengths of the damper 10 according to the distance between the upper surface of the furniture F to be attached and the ceiling C. What is kept in a state can be prepared. Moreover, even if the standard of the length of the damper 10 is changed, it can be easily handled by changing the length of the fixed cable 90.

When the fall prevention device is mounted between the upper surface of the furniture F and the ceiling C, the first base portion 30A of the fall prevention device held in a contracted state by the fixed rope 90 is brought into contact with the upper surface of the furniture F. Put. Thereafter, when the fixed cable 90 is unwound or cut, the damper 10 expands due to the expansion force of the compressed gas sealed in the cylinder 11 and the second base portion 30B comes into contact with the ceiling C. As described above, the fall prevention device does not require an operator to perform an installation operation for contracting the damper 10 above the furniture F, and thus can be easily and safely attached between the upper surface of the furniture F and the ceiling C. be able to.

In addition, the fall prevention device reduces the extension of the damper 10 when the second base portion 30B changes from the state contracted by the fixed cable 90 to the state in which the second base portion 30B is in contact with the ceiling C. The impact abutting on the ceiling C can be reduced. For this reason, according to the space | interval of the upper surface of the furniture F and the ceiling C, while preparing the multiple types of fall prevention apparatus from which the length of the cylinder 11 and the rod 13 of the damper 10 differs, the cylinder 11 and the rod of the damper 10 are further prepared. It is preferable to prepare a plurality of types in which the length of 13 is the same and the contraction length of the damper 10 is different depending on the fixed rope 90.

Next, an attachment method for attaching the fall prevention device between the upper surface of the furniture F installed on the floor surface and the ceiling C with the back surface facing the wall surface W will be described.

First, it has the length of the cylinder 11 and the rod 13 suitable for the space | interval of the upper surface of the furniture F which attaches the fall prevention apparatus, and the ceiling C, Comprising: The impact which the 2nd base part 30B contact | abuts to the ceiling C at the time of attachment. The fall prevention device in which the damper 10 is held in a contracted state with an appropriate length by the fixed rope 90 is selected so as to be small.

Next, the locking portion 51A of the connecting portion 51 of the fall prevention portion 50 is inserted into one locked hole 49 formed in the base portion main body 31 of the first base portion 30A of the fall prevention device, and the first base The fall prevention part 50 is attached to the part 30A. Further, the insertion portion 71B of the angle restricting portion 70 is inserted into the other locked hole 49 formed in the base portion main body 31 of the first base portion 30A, and the angle restricting portion 70 is attached to the first base portion 30A.

Next, the first base portion 30A to which the fall preventing portion 50 and the angle restricting portion 70 are attached is mounted with the non-slip portion 37 in contact with the upper surface on the wall surface W side of the furniture F as shown in FIG. Put. At this time, the first base portion 30 </ b> A is placed on the upper surface of the furniture F so that the hanging portion 53 of the fall prevention unit 50 is suspended along the back surface of the furniture F. That is, the hanging part 53 of the fall prevention part 50 is disposed between the wall surface W and the back surface of the furniture F. Further, in a state in which the first base portion 30A is placed on the upper surface of the furniture F, the shaft portion 45B (rotating shaft) of the bolt 45 of the first base portion 30A is inclined in the direction in which the furniture F is tilted by shaking such as an earthquake (see FIG. 8 in the direction orthogonal to the right direction). That is, the first base portion 30A is placed on the upper surface of the furniture F so that the direction in which the damper 10 rotates about the rotation axis and the direction in which the furniture F tilts are parallel to each other.

Then, the damper 10 is tilted so that the cylinder 11 of the damper 10 contacts the receiving portion 71A of the angle restricting portion 70. In this state, the damper 10 has an appropriate inclination angle between 15 ° and 25 °. Then, the second base portion 30B is arranged such that the shaft portion 45B (rotation shaft) of the bolt 45 of the second base portion 30B is parallel to the shaft portion 45B (rotation shaft) of the bolt 45 of the first base portion 30A. Correct the direction of. In this state, when the fixed cable 90 is unwound or cut, the damper 10 expands due to the expansion force of the compressed gas sealed in the cylinder 11, and the second base portion 30B contacts the ceiling C as shown in FIG. Touch. In this way, the installation work for attaching the fall prevention device between the upper surface of the furniture F and the ceiling C is completed. Note that the angle restricting portion 70 may be removed from the first base portion 30A after completing the attaching operation.

Thus, this fall prevention device can incline the damper 10 at an appropriate inclination angle if the first base portion 30A to which the angle restricting portion 70 is attached is placed on the upper surface of the furniture F. The fall prevention device can be appropriately attached between the upper surface of the furniture F and the ceiling C only by maintaining the angle and bringing the second base portion 30B into contact with the ceiling C.

In the fall prevention device attached between the upper surface of the furniture F and the ceiling C, the axis of the damper 10 extending from the ceiling C side to the upper surface side of the furniture F is inclined downward, and an earthquake or the like in a plan view viewed from above. The damper 10 is attached in a state in which the axis of the damper 10 extends parallel to the direction in which the furniture F tilts (rightward) due to the shaking. For this reason, this fall prevention device can utilize the damping force of the damper 10 with respect to the inclination of the furniture F, and can prevent the fall of the furniture F.

Further, in the fall prevention device, the base portions 30A and 30B are connected to the both ends of the damper 10 via the bushes 35, respectively. As for this bush 35, 35 C of inner peripheral surfaces of both ends are expanded in the outward direction. For this reason, the bushing is oscillated by the dimensional allowance and the diameter of the inner circumferential surface 35C, and the bushing 35 is in a range where the inner circumferential surfaces 35C at both ends of the bush 35 abut on the outer circumferential surface of the shaft 45B of the bolt 45. 35 can be tilted with respect to the pivot axis. Therefore, the damper 10 connected to each of the base portions 30A and 30B can swing in a direction crossing the rotation direction.

Thus, even if the furniture F shakes in a direction intersecting the rotation direction of the damper 10 due to a shake such as an earthquake, the fall prevention device swings in a direction intersecting the rotation direction. Each base part 30A, 30B can maintain the state which contact | abutted to the upper surface of the furniture F, and the ceiling C. FIG. When the furniture F tilts in a direction parallel to the rotation direction of the damper 10, the fall prevention device rotates the damper 10 around the rotation axis, so that the damping force of the damper 10 acts on the furniture F. The inclination of the furniture F can be suppressed and the furniture F can be prevented from falling. That is, this fall prevention device maintains the state where the base portions 30A and 30B are in contact with the upper surface of the furniture F and the ceiling C against an earthquake whose shaking directions are complex, and prevents the furniture F from falling over. can do.

In addition, this fall prevention device is in the process of being attached between the upper surface of the furniture F and the ceiling C, and is in a state before the second base portion 30B is brought into contact with the ceiling C, that is, on the upper surface of the furniture F. 1 In a state where the base portion 30A is placed in contact with the hanging portion 53 of the fall prevention portion 50 between the wall surface W and the back surface of the furniture F, the upper side of the fall prevention device is separated from the wall surface W. When it falls, the wall surface W side of the first base portion 30 </ b> A brought into contact with the upper surface of the furniture F is lifted with the momentum. Then, in this overturn prevention device, as shown in FIG. 9, the drooping portion 53 of the fall prevention portion 50 attached to the first base portion 30 </ b> A is caught on the wall surface W. For this reason, this fall prevention device can prevent falling to the front side of furniture F.

As described above, the fall prevention device of the first embodiment includes the damper 10, the pair of base portions 30A and 30B, and the fixed rope 90. The damper 10 is attached between the upper surface of the furniture F installed on the floor surface and the ceiling C. Each of the base portions 30A and 30B is connected to each of both end portions of the damper 10. Further, the first base portion 30A abuts on the upper surface of the furniture F, and the second base portion 30B abuts on the ceiling C. The fixed rope 90 holds the damper 10 in a contracted state of a desired length.

This fall prevention device places the first base portion 30A in contact with the upper surface of the furniture F in a state where the fixed rope 90 holds the damper 10 in a contracted state of a desired length. And after positioning the damper 10 so that it may be in the attachment state extended in the desired direction, the fixed line 90 is unwound or cut | disconnected. Then, the damper 10 extends and the second base portion 30B comes into contact with the ceiling C, and the mounting operation can be completed. As described above, since the fall prevention device does not require an operator to perform the installation work while contracting the damper 10 above the furniture F, it can be easily attached between the upper surface of the furniture F and the ceiling C. .

Therefore, the fall prevention device of Embodiment 1 can be easily attached between the upper surface of the furniture F and the ceiling C.

Each base part 30A, 30B of the fall prevention device of the first embodiment includes a rotating shaft member (bolt 45 and nut 47) that pivotally supports each of both end portions of the damper 10. The fixed cable 90 is locked to each rotation shaft member (bolt 45 and nut 47). For this reason, this fall prevention device uses the rotation shaft members (bolts 45 and nuts 47) located at both ends of the damper 10 without providing a structure only for locking the fixed rope 90, and the damper 10 It is possible to maintain a contracted state of a desired length.

In the overturn prevention device of the first embodiment, the head 45A and the nut 47 (both ends of the rotating shaft member) of the bolt 45 are exposed from the base portions 30A and 30B at positions symmetrical to the central axis of the damper 10. Further, the fixed rope 90 is engaged with each of the head 45A and the nut 47 of the bolt 45 exposed from the base portions 30A and 30B on both sides, and extends together at the central portion. In this case, since the fixed rope 90 locked to the head 45A and the nut 47 of the bolt 45 at both ends is stretched as one piece at the central portion, the damper 10 can be held in a contracted state with a good balance.

The overturn prevention device according to the first embodiment includes an angle regulation unit 70. The angle restricting portion 70 is attached to the first base portion 30 </ b> A that contacts the upper surface of the furniture F, and restricts the inclination angle of the damper 10. For this reason, if this fall prevention device is placed with the first base portion 30 </ b> A in contact with the upper surface of the furniture F, the damper 10 is disposed at a desired inclination angle by the angle regulating portion 70. If the fixed cable 90 is unwound or cut in this state, the fall prevention device can be mounted between the upper surface of the furniture F and the ceiling C with the damper 10 at a desired inclination angle.

<Embodiment 2>
Next, Embodiment 2 will be described with reference to FIGS.
The fall prevention device 201 of the second embodiment shown in FIG. 10 and the like differs from the fall prevention device of the first embodiment in that the fixed rope 90 (FIG. 7 and the like) is changed to the fixed rope 290 shown in FIG. Has the same configuration as that of the first embodiment and has the same function. Therefore, parts other than the fixed cable 290 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. Also in the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

10 includes a damper 10 and a pair of base portions 30A and 30B similar to those of the first embodiment. As shown in FIGS. 12 and 13, the damper 10 is attached between the upper surface of the furniture F and the ceiling C when the fall prevention device 201 is attached. The pair of base portions 30A and 30B are connected to both end portions of the damper 10, and one first base portion 30A is in contact with the upper surface of the furniture F and the other second base portion 30B is in contact with the ceiling C. Used in. Furthermore, the fall prevention device 201 includes an angle restricting unit 70 having the same configuration and function as those of the first embodiment. The angle restricting portion 70 is attached to the first base portion 30 </ b> A that contacts the upper surface of the furniture F, and restricts the inclination angle of the damper 10. The overturn prevention device 201 includes a fall prevention unit 50 having the same configuration and function as in the first embodiment.

In the overturn prevention device 201, the bolt 45 and the nut 47 attached to the first base portion 30A function as a rotation shaft member on one side. The bolt 45 and the nut 47 attached to the second base portion 30B function as the other rotation shaft member. The head 45 </ b> A and the nut 47 of the bolt 45, which are both ends of each rotating shaft member, are exposed in the recessed portion 42 of the base portion main body 31 at positions symmetrical to the central axis of the damper 10. The fixed rope 290 has one end portion locked to the bolt 45 and the nut 47 attached to the first base portion 30A, and the other end portion attached to the second base portion 30B. Respectively. In this way, the fixed cable 290 is attached to the first base portion 30A and the second base portion 30B.

The fixed cable 290 is a member that regulates the spread of the distance between the base portions 30A and 30B. When the fixed rope 290 is attached to the base portions 30A and 30B as shown in FIG. 10, the damper 10 contracts to a desired length. Keep in state. The fixed cable 290 includes a band member 210 made of a resin material and an article-side connecting portion 220 made of a chemical fiber string, and the band member 210 and the connecting portion 220 are connected to each other.

The band member 210 is made of, for example, a resin material such as polypropylene, and is configured as a band member having an elongated shape and a predetermined thickness. The band member 210 is configured to be easily bent, but its stretchability is suppressed. The band member 210 has a long and thin plate shape as shown in FIG. A through-hole portion 212A penetrating in the thickness direction is formed on one side in the longitudinal direction of the band member 210, and a through-hole portion 212B penetrating in the thickness direction is also formed on the other side in the longitudinal direction. A long hole portion 214 that penetrates in the thickness direction and is elongated in the longitudinal direction of the band member 210 is formed at a position closer to the center than the through hole portion 212A on one side in the longitudinal direction of the band member 210. ing.

The band member 210 has an end portion on the other side in the longitudinal direction (an end portion on the through-hole portion 212B side) inserted into the long hole portion 214 from the extended state as shown in FIG. By passing through the portion 214, the crossing state as shown in FIG. 10 is obtained. When the band member 210 is in an intersecting state as shown in FIG. 10, an intersecting portion 216 is formed in which a portion near one end in the longitudinal direction (portion constituting the long hole portion 214) and a portion near the other end in the longitudinal direction intersect. . In such an intersecting state, the band member 210 is locked so that the through-hole portion 212A formed on one side is fitted to the nut 47, and the through-hole portion 212B formed on the other side is the head of the bolt 45. It latches so that it may fit part 45A. The central portion when the band member 210 has a longitudinal shape as shown in FIG. 11 is configured as an annular grip portion 280 when in an intersecting state as shown in FIG. The gripping portion 280 is a portion that is gripped and operated by an operator in the attached state as shown in FIGS.

As shown in FIG. 10, the article-side connecting portion 220 of the fixed cable 290 connects the annular portion (gripping portion 280) of the band member 210 arranged in an intersecting state and the first base portion 30A. Be placed. The article-side connecting portion 220 is formed of, for example, a chemical fiber string, and is attached so as to pull the grip portion 280 formed on the band member 210 downward. The length of the damper 10 in the contracted state and the distance between the base portions 30A and 30B can be determined by adjusting the length of the connecting portion 220 on the article side. That is, in the article-side connecting portion 220, the damper 10 can be lengthened by increasing the distance between the contact portion caught by the grip portion 280 and the rotary shaft member (bolt 45 and nut 47). Conversely, if the distance between the contact portion and the rotating shaft member (bolt 45 and nut 47) is shortened, the damper 10 can be shortened.

The fall prevention device 201 having this configuration can be attached in the same manner as the fall prevention device of the first embodiment. First, as shown in FIG. 10, the first base portion 30 </ b> A of the fall prevention device 201 held in a contracted state by the fixed cable 290 is placed in contact with the upper surface of the furniture F in the same manner as in the first embodiment. In FIG. 10, the fall prevention unit 50 and the angle regulation unit 70 are omitted, but these can be attached with the same configuration as in the first embodiment. One or both of the fall prevention unit 50 and the angle regulating unit 70 may be omitted.

After the fall prevention device 201 in the contracted state is placed on the upper surface of the furniture F, the article-side connecting portion 220 is unwound or cut. Then, the damper 10 expands due to the expansion force of the compressed gas sealed in the cylinder 11, and the second base portion 30B comes into contact with the ceiling C as shown in FIGS. As described above, even in the fall prevention device 201 of this configuration, since it is not necessary for the operator to perform the installation work for contracting the damper 10 above the furniture F, the upper surface of the furniture F and the ceiling C can be easily and safely connected. Can be installed in between.

As shown in FIGS. 12 and 13, when the overturn prevention device 201 is attached between the ceiling C and the furniture F, the band member 210 forming a part of the fixed rope 290 (FIG. 10) is suspended from the second base portion 30B. Go down. At this time, in the band member 210, the annular gripping portion 280 is disposed below the intersecting portion 216.

When the fall prevention device 201 is attached between the ceiling C and the furniture F as shown in FIGS. 12 and 13, if the second base portion 30 </ b> B is in contact with the ceiling C at a desired position, the attachment work is finished as it is. Can do. In this case, the band member 210 may be detached from the second base portion 30B or may be attached as it is.

On the other hand, when the second base portion 30B is not in contact with the ceiling C at a desired position in the attached state as shown in FIGS. 12 and 13, and the position should be changed, for example, the operator holds the annular gripping portion 280. The operation of pulling the grip 280 downward is performed. When the operation of pulling the grip portion 280 downward against the urging of the damper 10 is performed, the second base portion 90B can be moved downward to be separated from the ceiling C, and the second base portion 30B and the ceiling C can be separated. In such a state, no frictional force can be generated. Thus, the 2nd base part 30B can be moved to a desired position by moving the holding part 280 back and forth or right and left, separating the 2nd base part 30B from the ceiling C. When the pulling with respect to the grip portion 280 is terminated at a desired position, the second base portion 30B is positioned in contact with the ceiling C in the vicinity of the position.

As described above, the installation work can be facilitated even with the fall prevention device 201 of this configuration. That is, when the first base portion 30A is placed on the upper surface of the article and the article-side connecting portion 220 is unwound or cut when the fixed rope 290 is contracted, the overturn prevention device 201 is easily provided. Can be attached.

Furthermore, the overturn prevention device 201 of this configuration is arranged so that the grip portion 280 coupled to the second base portion 30B that contacts the ceiling C hangs down from the second base portion 30B when in the attached state. Therefore, the operator can separate the second base portion 30B from the ceiling C against the urging of the damper 10 by pulling the grip portion 280 downward. As described above, even after the second base portion 30B comes into contact with the ceiling, the operation of separating the second base portion 30B from the ceiling C can be easily performed, so that the position of the second base portion 30B can be changed more easily. .

In particular, since the annular gripping portion 280 is disposed at a position lower than the second base portion 30B on the ceiling side in the mounted state, the operator's hand is compared with the work of directly gripping the second base portion 30B. Is easier to reach and grip. The grip 280 is connected to a rotating shaft member that is disposed on the central axis of the damper 10 and is a portion to which the rod 13 is connected. Therefore, when the grip 280 is pulled downward, a force in the contraction direction is easily applied to the rod 13 and the damper 10 is easily contracted with a smaller force.

<Embodiment 3>
Next, Embodiment 3 will be described with reference to FIGS.
The fall prevention device 301 of the third embodiment shown in FIG. 14 and the like is different from the fall prevention device of the first embodiment in that the fixed cable 90 (FIG. 7 and the like) is changed to a fixed cable 390 as shown in FIGS. Other parts have the same configuration as that of the first embodiment and have the same functions. Therefore, parts other than the fixed cable 390 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. Also in the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

14 includes a damper 10 and a pair of base portions 30A and 30B similar to those of the first embodiment. As shown in FIG. 16, the damper 10 is attached between the upper surface of the furniture F and the ceiling C when the fall prevention device 301 is attached. The pair of base portions 30A and 30B are connected to both end portions of the damper 10, and one first base portion 30A is in contact with the upper surface of the furniture F and the other second base portion 30B is in contact with the ceiling C. Used in. Further, the overturn prevention device 301 includes an angle regulation unit 70 and a fall prevention unit 50 having the same configuration and function as those of the first embodiment.

The fixed cable 390 shown in FIG. 15 is made of a resin material such as polypropylene, for example, and includes a first locking portion 330 attached to the first base portion 30A and a second locking portion 340 attached to the second base portion 30B. And an annular grip portion 380. Further, the fixed cable 390 includes an article-side connecting portion 320 that connects the first locking portion 330 and the grip portion 380, and a ceiling-side connecting portion 310 that connects the second locking portion 340 and the grip portion 380. Prepare. And these 1st latching | locking part 330, the 2nd latching | locking part 340, the holding | grip part 380, the connection part 320 by the side of goods, and the connection part 310 by the side of a ceiling are integrated.

In the overturn prevention device 301, as shown in FIG. 18, the bolt 45 and the nut 47 attached to the first base portion 30A function as a rotation shaft member on one side. As shown in FIG. 17, the bolt 45 and the nut 47 attached to the second base portion 30 </ b> B function as the other rotation shaft member. The head 45 </ b> A and the nut 47 of the bolt 45, which are both ends of each rotating shaft member, are exposed in the recessed portion 42 of the base portion main body 31 at positions symmetrical to the central axis of the damper 10. Then, as shown in FIG. 18, the fixed cable 390 has a first locking portion 330 provided on one end side locked to a bolt 45 and a nut 47 attached to the first base portion 30 </ b> A. As shown in FIG. 17, the second locking portion 340 provided on the other end side of the fixed cable 390 is locked to the bolt 45 and the nut 47 attached to the second base portion 30B. In this way, the fixed cable 390 is attached so as to connect the first base portion 30A and the second base portion 30B.

As shown in FIG. 17, the second locking portion 340 includes a root portion 341 that is disposed laterally with respect to the coupling portion 310 on the ceiling side, and a pair of rising portions 342 and 343 that rise from the root portion 341. . The pair of rising portions 342 and 343 are disposed to face each other. The pair of rising portions 342 and 343 are each configured as a plate piece, and the plate surfaces of both the rising portions 342 and 343 are arranged substantially in parallel. In the rising portions 342 and 343, through- hole portions 342A and 343A penetrating in the thickness direction are formed facing each other. As shown in FIG. 17, of the through holes 342A and 343A formed in the second locking portion 340, one through hole 342A is fitted to the head 45A of the bolt 45 provided in the second base portion 30B. To lock. The other through-hole portion 343 </ b> A is locked so as to be fitted to the nut 47.

The connecting part 310 on the ceiling side is connected to the center position in the longitudinal direction of the root part 341, and extends from the surface side opposite to the surface side from which the rising parts 342 and 343 project. The end portion (corner portion 381) of the grip portion 380 is connected to the end portion of the connecting portion 310 on the ceiling side. The connecting portion 310 on the ceiling side is connected to the second base portion 30B that comes into contact with the ceiling via the second locking portion 340, and functions to connect the second base portion 30B and the grip portion 380.

The gripping part 380 is connected to the second base part 30B by the second locking part 340 and the connecting part 310 on the ceiling side, and is suspended as shown in FIG. The grip portion 380 is configured in a predetermined direction indicating shape indicating the arrangement side of the second base portion 30B that comes into contact with the ceiling. Specifically, as shown in FIGS. 15 and 17, the gripping portion 380 is formed in a triangular frame shape in which a plurality of linear portions 384, 385, 386 are connected, and has an annular shape with an open central portion. . The grip portion 380 is formed with three corner portions 381, 382, and 383. The side connected to the corner portion 381 is the arrangement side of the second base portion 30B, and the side connected to the central portion of the linear portion 386 is the arrangement side of the first base portion 30A. That is, the arrangement side of the second base portion 30 </ b> B that comes into contact with the ceiling in the direction in which the corner portion 381 is convex is shown.

In this configuration, the direction of the triangular frame constituting the grip portion 380 (specifically, the direction of the corner portion 381) when suspended by holding either the first locking portion 330 or the second locking portion 340. Shows the arrangement side of the second base portion 30B. For example, when hanging with the second locking portion 340, the convex direction of the corner portion 381 is upward, so that it can be understood that the upper side is the arrangement side of the second base portion 30B. Moreover, since the direction which becomes convex of the corner | angular part 381 turns downward when it hangs with the 1st latching | locking part 330, it can grasp | ascertain that a lower side is the arrangement | positioning side of the 2nd base part 30B.

As shown in FIG. 14, the article-side connecting portion 320 has a function of connecting the first base portion 30 </ b> A that abuts the upper surface of the furniture F and the grip portion 380, and is a portion that is to be cut during attachment work. is there. In this configuration, the connection part 310 on the ceiling side is thicker than the connection part 320 on the article side. Specifically, both the ceiling-side connecting portion 310 and the article-side connecting portion 320 have a circular cut surface, and the outer diameter of the ceiling-side connecting portion 310 is larger than that of the article-side connecting portion 320. It is larger than the outer diameter.

As shown in FIG. 15, the first locking portion 330 includes a root portion 331 disposed laterally with respect to the article-side connecting portion 320 and a pair of rising portions 332 and 333 that fall from the root portion 331. Prepare. The central portion of the root portion 331 is connected to the end of the article-side connecting portion 320. The pair of falling portions 332 and 333 are disposed to face each other. The pair of falling portions 332 and 333 extend substantially in parallel, and through- hole portions 332A and 333A penetrating in the thickness direction are formed facing each other near the tip portion. As shown in FIG. 18, of the through holes 332A and 333A formed in the first locking portion 330, one through hole 332A is fitted to the head 45A of the bolt 45 provided in the first base portion 30A. To lock. The other through-hole portion 333 </ b> A is locked so as to be fitted to the nut 47.

When attaching the fixed cable 390 to the first base portion 30A and the second base portion 30B, the damper 10 is contracted. In the contracted state, the locking portions 330 and 340 are attached to the rotating shaft members (bolts 45 and nuts 47) of the first base portion 30A and the second base portion 30B. As a result, as shown in FIG. 14, the rotation shaft members are connected to each other, and the extension is restricted, and the damper 10 is maintained in the contracted state.

The fall prevention device 301 of this configuration can be attached in the same manner as the fall prevention device of the first embodiment. Specifically, as shown in FIG. 14, after the fall prevention device 301 that is contracted by the fixed cable 390 is placed on the upper surface of the furniture F, the article-side connecting portion 320 or the first locking portion 330 is cut. . Then, the damper 10 expands due to the expansion force of the compressed gas sealed in the cylinder 11, and the second base portion 30B comes into contact with the ceiling C as shown in FIG. As described above, even in the fall prevention device 301 of this configuration, since it is not necessary for the operator to perform the installation work of contracting the damper 10 above the furniture F, the upper surface of the furniture F and the ceiling C can be easily and safely connected. Can be installed in between.

As shown in FIG. 16, when the overturn prevention device 301 is attached between the ceiling C and the furniture F, the grip portion 380 that forms a part of the fixed rope 390 (FIG. 14) is connected via the article-side connection portion 310. 2 Hanging from the base portion 30B. In such an attachment state, if the second base portion 30B is in contact with the ceiling C at a desired position, the attachment operation can be finished as it is. In this case, the cut fixed cable 390 may be removed or attached as it is.

On the other hand, when the second base portion 30B is not in contact with the ceiling C at a desired position in the attached state and the position should be changed, the same movement operation as that of the second embodiment may be performed. For example, the operator pulls the gripping part 380 downward while holding the annular gripping part 380 so that the damper 10 is contracted, and the gripping part 380 is moved back and forth or left and right while separating the second base part 30B from the ceiling C. Move to. By this operation, the second base portion 30B can be moved to a desired position. If the pulling on the grip portion 380 is terminated at the desired position, the second base portion 30B comes into contact with the ceiling C in the vicinity of the position. Will be positioned.

As described above, even in the fall prevention device 301 of this configuration, after the second base portion 30B is attached to the ceiling C, it is easy to perform an operation of moving the second base portion 30B away from the ceiling. Therefore, the position change of the 2nd base part 30B can be performed more easily.

Furthermore, the gripping portion 380 of the overturn prevention device 301 is configured with a predetermined direction indicating shape indicating the arrangement side of the second base portion 30B that contacts the ceiling. Thus, if the shape of the holding part 380 is comprised by the predetermined direction indication shape, an operator can grasp | ascertain the direction of attachment of the fixed line 390 more easily. For example, it is possible to reduce a mistake that the fixed cable 390 is attached upside down when the fixed cable 390 is attached to both the base portions 30A and 30B. Further, when the base portions 30A and 30B to which the fixed rope 390 is attached are attached to the furniture F and the ceiling C, the base portion or the article side that should be the ceiling side by the direction indicating shape represented by the grip portion 380 should be provided. It can be installed while checking the base. Therefore, it is possible to reduce mistakes that the first base portion 30A to be disposed on the furniture F side and the second base portion 30B to be disposed on the ceiling C side are attached in reverse.

Furthermore, the fixed rope 390 of the fall prevention device 301 has a configuration in which the connecting portion 310 on the ceiling side is thicker than the connecting portion 320 on the article side. If the ceiling-side connecting portion 310 is thicker than the article-side connecting portion 320, the strength of the ceiling-side connecting portion 310 is increased, and the article-side connecting portion 320 can be easily cut or the like. it can. When the strength of the coupling part 310 on the ceiling side is increased, when the second base part 30B is attached to the ceiling and then the grip part 380 is pulled downward to separate the second base part 30B from the ceiling, the grip part 380 Even if a strong force is applied between the second base portion 30B and the second base portion 30B, breakage or the like hardly occurs.

<Embodiment 4>
Next, Embodiment 4 will be described with reference to FIGS.
The fall prevention device 401 of the fourth embodiment shown in FIG. 19 and the like is different from the fall prevention device of the first embodiment in that the fixed rope 90 (FIG. 7 and the like) is changed to the fixed rope 490 as shown in FIGS. Other parts have the same configuration as that of the first embodiment and have the same functions. Therefore, parts other than the fixed cable 490 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. Also in the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

19 includes a damper 10 and a pair of base portions 30A and 30B similar to those of the first embodiment. As shown in FIG. 21, the damper 10 is attached between the upper surface of the furniture F and the ceiling C when the fall prevention device 401 is attached. The pair of base portions 30A and 30B are connected to both end portions of the damper 10, and one first base portion 30A is in contact with the upper surface of the furniture F and the other second base portion 30B is in contact with the ceiling C. Used in. Further, the overturn prevention device 401 includes an angle regulation unit 70 and a fall prevention unit 50 having the same configuration and function as those of the first embodiment.

19 is made of, for example, a resin material such as polypropylene. The fixed cable 490 includes a first locking portion 430 attached to the first base portion 30A, a second locking portion 440 attached to the second base portion 30B, a first locking portion 430, and a second locking portion. And a connecting portion 450 for connecting 440. And these 1st latching | locking parts 430, the 2nd latching | locking part 440, and the connection part 450 are integrated. The fixed rope 490 has a symmetrical shape at the top and bottom, and the back and front are also symmetrical or almost symmetrical. That is, the shape is the same even if the top and bottom are reversed, and the shape is the same or substantially the same even if the front and back are reversed.

In the overturn prevention device 401, a bolt 45 and a nut (a nut similar to the nut 47 of the first embodiment) attached to the first base portion 30A function as a rotation shaft member on one side. As shown in FIG. 22, the bolt 45 and the nut 47 attached to the second base portion 30B function as the other rotation shaft member. The head 45 </ b> A and the nut 47 of the bolt 45, which are both ends of each rotating shaft member, are exposed in the recessed portion 42 of the base portion main body 31 at positions symmetrical to the central axis of the damper 10.

As shown in FIG. 22, the second locking portion 440 is locked to the bolt 45 and the nut 47 attached to the second base portion 30B, and is attached to the second base portion 30B contacting the ceiling C. As shown in FIG. 20, the second locking portion 440 is provided at the end portion of the connecting portion 450, and has a root portion 441 extending in the lateral direction with respect to the longitudinal direction of the connecting portion 450, and a pair of rising from the root portion 441. Rising portions 442 and 443. The pair of rising portions 442 and 443 are disposed to face each other, and through- hole portions 442A and 443A are formed at the tip portions of both the rising portions 442 and 443 so as to face each other. As shown in FIG. 22, of the through holes 442A and 443A formed in the second locking portion 440, one through hole 442A is fitted to the head 45A of the bolt 45 provided in the second base portion 30B. To lock. The other through-hole portion 443A is locked so as to be fitted to the nut 47. The through- hole portions 442A and 443A correspond to an example of a fixing portion.

As shown in FIG. 20, the first locking portion 430 has the same shape as the second locking portion 440. The first locking portion 430 is provided at an end portion of the connecting portion 450, and has a root portion 431 extending in the lateral direction with respect to the longitudinal direction of the connecting portion 450, and a pair of rising portions 432 and 433 rising from the root portion 431. Is provided. The pair of rising portions 432 and 433 are arranged to face each other, and through- hole portions 432A and 433A are formed facing each other at the tip portions of both the rising portions 432 and 433. Of the through- hole portions 432A and 433A formed in the first locking portion 430, one through-hole portion 432A is locked so as to be fitted to the head portion 45A of the bolt 45 provided in the first base portion 30A. . The other through-hole portion 433A is locked so as to be fitted to a nut connected to the bolt 45. In this way, the fixed cable 490 is attached so as to connect the first base portion 30A and the second base portion 30B.

As shown in FIG. 20, the connecting portion 450 has a structure that connects the first locking portion 430 and the second locking portion 440, and is configured in a belt shape having a predetermined thickness and a predetermined width. A first mark portion 461 is formed at a position away from the through- hole portions 442A and 443A (fixed portion) on one surface of the connecting portion 450. The first mark portion 461 is configured as, for example, a groove portion formed in one surface of the connecting portion 450 in the width direction (lateral direction with respect to the longitudinal direction of the connecting portion 450). When the damper 10 has the maximum allowable length, the first mark portion 461 has a portion from the through hole portions 442A, 443A to the first mark portion 461 hanging from the second base portion 30B. The position of the upper end portion 11A in the vertical direction is shown.

Furthermore, a second mark portion 462 is formed at a position different from the first mark portion 461 in the connecting portion 450. The 2nd mark part 462 is comprised as a groove part of the width direction (lateral direction with respect to the longitudinal direction of the connection part 450) formed in the one surface of the connection part 450, for example. When the damper 10 has a minimum allowable length, the second mark portion 462 has a portion from the through- hole portions 442A, 443A to the second mark portion 462 hanging down from the second base portion 30B. The position of the upper end portion 11A is shown.

The “maximum permissible length” of the damper 10 can be determined in advance by, for example, the maximum length of the damper 10 when the entire piston fits in the hydraulic oil or a length slightly shorter than that. That is, when the damper 10 becomes longer than the maximum length, a part of the piston 102 (FIG. 23) enters the compressed gas region 109. Further, the “allowable minimum length” of the damper 10 is a length at which the piston 102 cannot sufficiently stroke, for example, a length at which the damper 10 does not contract any more, or slightly longer than that. The length can be determined in advance.

In this configuration, the inside of the cylinder 11 has a structure as shown in FIG. 23, for example, and hydraulic oil and compressed gas are sealed in the cylinder 11. The inside of the cylinder 11 is partitioned by a piston 102 into a rod side pressure chamber 104 in which the base end portion of the rod 13 is housed and an anti-rod side pressure chamber 105. The piston 102 is formed with an orifice 106 which is a throttle valve for communicating between the two pressure chambers. The orifice 106 functions as a damping force generator that generates a damping force by applying resistance to the flow of hydraulic oil between the rod-side pressure chamber 104 and the anti-rod-side pressure chamber 105 that accompanies the expansion / contraction operation of the damper 10. Further, the piston 102 is formed with a communication passage that communicates between both pressure chambers via a check valve 108. The check valve 108 allows the flow of hydraulic oil from the rod-side pressure chamber 104 to the anti-rod-side pressure chamber 105 and blocks the reverse flow.

For example, let the length of the damper 10 when the piston 102 is in the area AR1 in FIG. 23 be the “allowable maximum length”. When the damper 10 has such a length, the vertical position of the first mark portion 461 in the fixed rope 490 suspended from the second base portion 30B is the same as the vertical position of the upper end portion 11A of the cylinder 11. become. That is, the first mark portion 461 is arranged on the straight line L1 shown in FIG.

For example, let the length of the damper 10 when the piston 102 is in the area AR2 in FIG. 23 be the “minimum allowable length”. When the damper 10 has such a length, the vertical position of the second mark portion 462 in the fixed rope 490 suspended from the second base portion 30B is the same as the vertical position of the upper end portion 11A of the cylinder 11. become. That is, the second mark portion 462 is disposed on the straight line L1 shown in FIG.

As shown in FIGS. 19 and 20, in the connecting portion 450, a hole 471 penetrating in the thickness direction is formed at a position near the first base portion 30A, and at a position near the second base portion 30B. A hole 472 that penetrates in the thickness direction is formed. The hole 471 is formed at a position closer to the first locking portion 430 than the first mark portion 461. The hole 472 is formed at a position closer to the second locking portion 440 than the second mark portion 462.

When the fixed cable 490 configured in this way is attached to the first base portion 30A and the second base portion 30B, the damper 10 is contracted. In this contracted state, the two locking portions 430 and 440 are attached to the rotating shaft members (bolts 45 and nuts 47) of the first base portion 30A and the second base portion 30B. As a result, as shown in FIG. 19, the rotation shaft members are connected to each other, and the extension is restricted, and the damper 10 is maintained in the contracted state.

The fall prevention device 401 of this configuration can be attached in the same manner as the fall prevention device of the first embodiment. Specifically, as shown in FIG. 19, after the fall prevention device 401 contracted by the fixed cable 490 is placed on the upper surface of the furniture F, a predetermined position (for example, the first mark portion 461 and the like) of the connecting portion 450 is placed. The position between the hole portions 471 is cut. Specifically, the position of the first mark portion 461 formed extending in the width direction is set as a cutting position, and it is preferable to cut along the first mark portion 461. Then, the damper 10 expands due to the expansion force of the compressed gas sealed in the cylinder 11, and the second base portion 30B comes into contact with the ceiling C as shown in FIG. As described above, even in the fall prevention device 401 of this configuration, since it is not necessary for the operator to perform the installation work for shrinking the damper 10 above the furniture F, the upper surface of the furniture F and the ceiling C can be easily and safely connected. Can be installed in between.

As shown in FIG. 21, when the overturn prevention device 401 is attached between the ceiling C and the furniture F, the connecting portion 450 forming a part of the fixed cable 490 (FIG. 14) hangs from the second base portion 30B. At this time, it can be confirmed whether or not the damper 10 has an appropriate length by the connecting portion 450 depending from the second base portion 30B.

Specifically, for example, the vertical relationship between the first mark portion 461 of the connecting portion 450 that hangs down from the second base portion 30B and the upper end portion 11A of the cylinder 11 after the mounting of both the base portions 30A and 30B is confirmed. That's fine. And if the 1st mark part 461 exists in the position above the upper end part 11A of the cylinder 11, it can grasp | ascertain that the length of the damper 10 has exceeded the determined maximum length. Conversely, if the first mark portion 461 of the connecting portion 450 that hangs down from the second base portion 30B is at a position below the upper end portion 11A of the cylinder 11, the maximum length with which the length of the damper 10 is determined. It can be confirmed that it is within. When cutting at the position of the first mark portion 461, the lowermost end portion of the connecting portion 450 after cutting may be located below the upper end portion 11 </ b> A of the cylinder 11. Thus, if the position of the 1st mark part 461 is made into a cutting position, a cutting position can be clearly shown to the operator who performs attachment work. Then, in the mounted state after cutting, if the positional relationship between the lower end portion of the fixed rope 490 suspended from the base portion 30B that contacts the ceiling C and the upper end portion 11A (predetermined portion) of the cylinder 11 is grasped, the length of the damper 10 is increased. Since it is possible to confirm whether or not the length is within a predetermined maximum length, the confirmation operation becomes even more accurate and easy.

Further, if the second mark portion 462 formed on the connecting portion 450 hanging from the second base portion 30B in contact with the ceiling is located above the upper end portion 11A (predetermined portion) of the cylinder 11, the damper It can be confirmed that the length of 10 is not less than the determined minimum length. On the contrary, if the second mark portion 462 of the connecting portion 450 hanging from the second base portion 30B is at a position below the upper end portion 11A (predetermined portion) of the cylinder 11, the length of the damper 10 is determined. That the minimum length is not reached.

As described above, in the fall prevention device 401 of this configuration, the fixed cable 490 is separated from the through hole portions 442A and 443A (fixed portion) attached to the second base portion 30B contacting the ceiling and the through hole portions 442A and 443A. And a first mark portion 461 formed at a predetermined position. Then, when the damper 10 has the maximum allowable length, the first mark portion 461 is from the second base portion 30B where the portions from the through- hole portions 442A, 443A to the first mark portion 461 come into contact with the ceiling. The position of the predetermined part of the damper 10 is shown in a state where it hangs down.

According to this structure, after attaching both base parts 30A and 30B to the furniture F side and the ceiling C side by releasing the fixed cable 490, the positions of the first mark part 461 and the upper end part 11A (predetermined part) of the cylinder 11 are set. You can easily grasp the relationship. And by grasping | ascertaining the positional relationship, it can be confirmed easily whether the length of the damper 10 is settled within the determined maximum length.

Further, the fixed cable 490 includes a second mark portion 462 formed at a position different from the first mark portion 461. When the damper 10 has a minimum allowable length, the second mark portion 462 has a portion from the through- hole portions 442A, 443A to the second mark portion 462 hanging down from the second base portion 30B. The position of the upper end portion 11A is shown.

According to this structure, after attaching both base parts 30A and 30B to the furniture F side and the ceiling C side by releasing the fixed cable 490, the positions of the second mark part 462 and the upper end part 11A (predetermined part) of the cylinder 11 are set. You can easily grasp the relationship. By grasping this positional relationship, it can be easily confirmed whether or not the length of the damper 10 is equal to or larger than the determined minimum length.

Further, the connecting portion 450 is formed with holes 471 and 472 penetrating through the fixed cable 490 at a position near the first base portion 30A and a position near the second base portion 30B, respectively. 21. When the damper 10 is extended as shown in FIG. 21, it becomes necessary to hold the damper 10 in a contracted state again, as shown in FIG. 21, and between the holes 471 and 472, wires, strings, etc. The damper 10 can be maintained in the contracted state again by connecting with the connecting member.

Also, the fixed cable 490 has a symmetrical shape on the top and bottom, and the back and front are also symmetrical. That is, the shape is the same even if the top and bottom are reversed, and the same shape is obtained even if the front and back are reversed. For this reason, it is not necessary to consider the up / down orientation and the front and back sides when attaching the fixed cable 490, and it is possible to reduce an attachment mistake in which the top and bottom are reversed and an attachment mistake in which the front and back are reversed.

<Embodiment 5>
Next, Embodiment 5 will be described with reference to FIGS.
The fall prevention device 501 of the fifth embodiment shown in FIG. 24 and the like is different from the fall prevention device of the first embodiment in that the fixed rope 90 (FIG. 7 and the like) is changed to the fixed rope 590 as shown in FIGS. Other parts have the same configuration as that of the first embodiment and have the same functions. Therefore, parts other than the fixed cable 590 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. Also in the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

Further, the fixed cable 590 is different from the fourth embodiment only in the structure of the connecting portion 550, and the first locking portion 430 and the second locking portion 440 other than the connecting portion 550 have the same configuration as that of the fourth embodiment. None, has the same function. Therefore, these portions are denoted by the same reference numerals as those in the fourth embodiment, and detailed description thereof is omitted. The structure for attaching the first locking portion 430 and the second locking portion 440 to the first base portion 30A and the second base portion 30B is the same as in the fourth embodiment.

Also in this configuration, as shown in FIG. 24, the fixed cable 590 is mounted so as to connect the first base portion 30A and the second base portion 30B. As shown in FIGS. 24 and 25, the connecting portion 550 of the fixed cable 590 has a structure that connects the first locking portion 430 and the second locking portion 440, and is configured in a belt shape having a predetermined thickness and a predetermined width. . In the connecting portion 550, a first mark portion 561 is formed at a position away from the through hole portions 442A and 443A. The first mark portion 561 is configured as, for example, the upper end portion of the long hole portion 560A formed in the connecting portion 550. When the damper 10 has the maximum allowable length, the first mark portion 561 hangs from the second base portion 30B from the through hole portions 442A, 443A (fixed portion) to the first mark portion 561. In the state, the vertical position of the upper end portion 11A of the cylinder 11 is shown.

Furthermore, a second mark portion 562 is formed at a position different from the first mark portion 561 in the connecting portion 550. The 2nd mark part 562 is comprised as a lower end part of the long hole part 560B formed in the connection part 550, for example. When the damper 10 has the minimum allowable length, the second mark portion 562 hangs from the second base portion 30B where the portions from the through- hole portions 442A, 443A to the second mark portion 562 abut against the ceiling C. The position of the upper end part 11A (predetermined part) of the cylinder 11 is shown.

The fall prevention device 501 shown in FIG. 24 can also be attached by the same method as the fall prevention device of the first embodiment. Specifically, as shown in FIG. 24, after the fall prevention device 501 contracted by the fixed cable 590 is placed on the upper surface of the furniture F, a predetermined position of the connecting portion 550 (for example, the first mark portion 561 and the like) If the position between the holes 571 is cut, it can be easily attached as shown in FIG. For example, the position of the long hole portion 560A is easily cut.

26, when the fall prevention device 501 is attached between the ceiling C and the furniture F, the connecting portion 550 that forms a part of the fixed rope 590 is suspended from the second base portion 30B. At this time, whether or not the damper 10 has an appropriate length can be confirmed by the connecting portion 550 hanging from the second base portion 30B. For example, if the first mark portion 561 formed on the connecting portion 550 hanging from the second base portion 30B is located above the upper end portion 11A (predetermined portion) of the cylinder 11, the length of the damper 10 is long. You can see that the maximum length is exceeded. On the other hand, if the first mark portion 561 of the hanging connecting portion 550 is located below the upper end portion 11A of the cylinder 11, the length of the damper 10 is within the determined maximum length. Can be confirmed.

Further, if the second mark portion 562 formed on the connecting portion 550 hanging from the second base portion 30B is located above the upper end portion 11A (predetermined portion) of the cylinder 11, the length of the damper 10 is increased. It can be confirmed that the length is not less than the determined minimum length. On the contrary, if the second mark portion 562 of the connecting portion 550 that hangs down from the second base portion 30B is at a position below the upper end portion 11A (predetermined portion) of the cylinder 11, the length of the damper 10 is determined. That the minimum length is not reached.

Also in this configuration, as shown in FIG. 25, the connecting portion 550 is formed with holes 571 and 572 penetrating through the fixed rope 590 at a position near the first base portion 30A and a position near the second base portion 30B. ing. When the damper 10 needs to be held in the contracted state again after the damper 10 is extended as shown in FIG. 26, the overturn prevention device 501 is configured such that a wire, a string, etc. The damper 10 can be maintained in the contracted state again by connecting with the connecting member.

<Embodiment 6>
Next, Embodiment 6 will be described with reference to FIGS.
The fall prevention device 601 of the sixth embodiment shown in FIG. 27 and the like is different from the fall prevention device of the first embodiment in that the fixed cable 90 (FIG. 7 and the like) is changed to a fixed cable 690 as shown in FIGS. Other parts have the same configuration as that of the first embodiment and have the same functions. Therefore, portions other than the fixed cable 690 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. Also in the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

27 includes a damper 10 and a pair of base portions 30A and 30B similar to those of the first embodiment. As shown in FIG. 29, the damper 10 is attached between the upper surface of the furniture F and the ceiling C when the fall prevention device 601 is attached. The pair of base portions 30A and 30B are connected to both end portions of the damper 10, and one first base portion 30A is in contact with the upper surface of the furniture F and the other second base portion 30B is in contact with the ceiling C. Used in. Further, the overturn prevention device 601 includes an angle regulation unit 70 and a fall prevention unit 50 having the same configuration and function as those of the first embodiment.

The fixed cable 690 shown in FIG. 28 is made of a resin material such as polypropylene, for example, and includes a first locking portion 630 attached to the first base portion 30A and a second locking portion 640 attached to the second base portion 30B. And a curved rod-shaped gripping portion 680. Further, the fixed cable 690 includes an article-side connecting portion 620 that connects the first locking portion 630 and the gripping portion 680, and a ceiling-side connecting portion 610 that connects the second locking portion 640 and the gripping portion 680. Prepare. And these 1st latching | locking part 630, 2nd latching | locking part 640, the holding | grip part 680, the connection part 620 by the side of goods, and the connection part 610 by the side of the ceiling are integrated.

In the overturn prevention device 601, the bolt 45 attached to the first base portion 30A and a nut connected thereto (a nut similar to the nut 47 of the first embodiment) function as a rotation shaft member on one side. As shown in FIG. 30, the bolt 45 and the nut 47 attached to the second base portion 30B function as the other rotation shaft member. The head 45 </ b> A and the nut 47 of the bolt 45, which are both ends of each rotating shaft member, are exposed in the recessed portion 42 of the base portion main body 31 at positions symmetrical to the central axis of the damper 10. The fixed cable 690 has a first locking portion 630 provided on one end side locked to a bolt 45 and a nut attached to the first base portion 30A. As shown in FIG. 30, the second locking portion 640 provided on the other end side of the fixed cable 690 is locked to the bolt 45 and the nut 47 attached to the second base portion 30B. In this way, the fixed cable 690 is attached so as to connect the first base portion 30A and the second base portion 30B.

As shown in FIG. 28, the second locking portion 640 includes a root portion 641 disposed in the lateral direction with respect to the coupling portion 610 on the ceiling side, and a pair of rising portions 642 and 643 that rise from the root portion 641. . The pair of rising portions 642 and 643 are arranged to face each other. The pair of rising portions 642 and 643 are formed with through- hole portions 642A and 643A facing each other. As shown in FIG. 30, one of the through- hole portions 642A and 643A is locked so as to be fitted to the head portion 45A of the bolt 45 provided in the second base portion 30B. The other through-hole portion 643 </ b> A is locked so as to be fitted to the nut 47. The through- hole portions 642A and 643A correspond to an example of a fixing portion.

As shown in FIG. 28, the connecting part 610 on the ceiling side is connected to the center position in the longitudinal direction of the root part 641, and extends from the surface side opposite to the surface side from which the rising parts 642 and 643 protrude. The center part of the grip part 680 is connected to the end of the connection part 610 on the ceiling side. The connecting portion 610 on the ceiling side is connected to the second base portion 30B that comes into contact with the ceiling via the second locking portion 640, and functions to connect the second base portion 30B and the grip portion 680.

The gripping portion 680 is connected to the second base portion 30B by the second locking portion 640 and the connecting portion 610 on the ceiling side, and is suspended as shown in FIG. 29 in the attached state. The gripping portion 680 is configured with a predetermined direction indicating shape that indicates the arrangement side of the first base portion 30 </ b> A that contacts the article. As shown in FIGS. 28 and 30, the gripping portion 680 has a bar shape curved in an arc shape, and the ceiling-side connecting portion 610 is connected to the concave portion (the concave portion 682). The article-side connecting portion 620 is connected to the convex side portion (the convex portion 681) of the grip portion 680. The gripping portion 680 indicates the arrangement side of the first base portion 30 </ b> A in the direction of the curved convex portion 681. The side on which the curved concave portion 682 faces (the side on which the concave portion 682 faces) is shown as the arrangement side of the second base portion 30B.

In this configuration, when the first locking portion 630 or the second locking portion 640 is held and suspended, the arrangement side of the first base portion 30A is indicated by the direction of the convex portion 681 of the grip portion 680. For example, when the second locking portion 640 is suspended, the convex direction of the convex portion 681 is downward, so that the lower side can be grasped as the arrangement side of the first base portion 30A. Moreover, since the direction which becomes convex of the convex part 681 becomes upward when it hangs with the 1st latching | locking part 630, it can grasp | ascertain that an upper side is the arrangement | positioning side of 30 A of 1st base parts.

The article-side connecting portion 620 has a function of connecting the first base portion 30A that is in contact with the upper surface of the furniture F and the grip portion 680, and is a portion to be cut during attachment work. In this configuration, the connecting portion 610 on the ceiling side is thicker than the connecting portion 620 on the article side. Both the ceiling-side connecting part 610 and the article-side connecting part 620 have a circular cut surface, and the outer diameter of the ceiling-side connecting part 610 is larger than the outer diameter of the article-side connecting part 620. It has become.

The first locking portion 630 includes a root portion 631 disposed in a lateral direction with respect to the article-side connecting portion 620 and a pair of rising portions 632 and 633 that fall from the root portion 631. The central portion of the root portion 631 is connected to the end portion of the connecting portion 620 on the article side. The pair of falling portions 632 and 633 are disposed to face each other. The pair of falling portions 632 and 633 extend substantially in parallel, and through- hole portions 632A and 633A are formed facing each other near the tip portion. Of the through- hole portions 632A and 633A formed in the first locking portion 630, one through-hole portion 632A is locked so as to be fitted to the head portion 45A of the bolt 45 provided in the first base portion 30A. . The other through-hole portion 633A is locked so as to be fitted with a nut assembled to the bolt 45.

When the fixed cable 690 is attached to the first base portion 30A and the second base portion 30B, the damper 10 is contracted. In the contracted state, the two locking portions 630 and 640 are attached to the rotating shaft members (bolts 45 and nuts 47) of the first base portion 30A and the second base portion 30B. As a result, as shown in FIG. 27, the two rotation shaft members are connected to each other to restrict the extension, and the damper 10 is maintained in the contracted state. The fall prevention device 601 is in such a contracted state, and can be attached by the same method as the fall prevention device of the first embodiment. As shown in FIG. 29, when the overturn prevention device 601 is attached between the ceiling C and the furniture F, the grip portion 680 forming a part of the fixed rope 690 is connected to the second base portion 30 </ b> B via the article-side connection portion 610. Hanging from. In this attached state, if the second base portion 30B is in contact with the ceiling C at a desired position, the attaching operation can be finished as it is. When the second base portion 30B is not in contact with the ceiling C at a desired position in the attached state and the position should be changed, the same movement operation as in the second and third embodiments is performed while holding the grip portion 680. Just do it.

In this configuration, the second mark portion 662 is formed in the ceiling-side connecting portion 610 at a position away from the through-hole portions 642A and 642B (fixed portion). The second mark portion 662 is configured as a flange portion that protrudes outward at the connecting portion 610 on the ceiling side that is configured in an axial shape. The second mark portion 662 is a second base in which the portion from the through hole portions 642A, 642B (fixed portion) to the second mark portion 562 contacts the ceiling C when the damper 10 has a minimum allowable length. The position of the upper end portion 11A of the cylinder 11 is shown in a state where it hangs down from the portion 30B. Because of such a configuration, it is possible to confirm whether or not the damper 10 is longer than the minimum allowable length by using the second mark portion 662 and the same method as in the fourth and fifth embodiments. it can.

In addition, in the fixed rope 690, the 1st mark part similar to 4th, 5th embodiment may be formed. The first mark portion may have a flange shape similar to that of the second mark portion 662, and may have other shapes such as a protrusion, a groove, and a mark of a predetermined color. When the damper 10 has an allowable maximum length, the first mark portion has a portion from the through hole portions 642A, 642B to the first mark portion hanging from the second base portion 30B. What is necessary is just to make it show the position of the up-down direction of 11 A of upper ends. With this configuration, it is possible to confirm whether or not the damper 10 is within the allowable maximum length using the first mark portion and the same method as in the fourth and fifth embodiments.

<Embodiment 7>
Next, Embodiment 7 will be described with reference to FIGS.
The fall prevention device 701 of the seventh embodiment shown in FIGS. 31 and 32 is the same as the fall prevention device of the first embodiment in that the fixed rope 90 (FIG. 7 and the like) is changed to a fixed rope 790 as shown in FIGS. The other parts are the same as those in the first embodiment and have the same functions. Therefore, parts other than the fixed cable 790 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. In the following description, the furniture F installed on the installation surface is illustrated as an example of the article, but may be applied to an article other than furniture.

Regarding the fixed cable 790, only the structure of the connecting portion 750 is different from the fourth and fifth embodiments, and the first locking portion 430 and the second locking portion 440 other than the connecting portion 750 are the same as those in the fourth and fifth embodiments. Has the same configuration and the same function. The structure for attaching the first locking portion 430 and the second locking portion 440 to the first base portion 30A and the second base portion 30B is the same as in the fourth and fifth embodiments. Therefore, these portions are denoted by the same reference numerals as those in the fourth and fifth embodiments, and detailed description thereof is omitted. The connecting portion 750 is different from the connecting portion 550 of the fifth embodiment only in that a long hole portion 760 is formed instead of the long hole portions 560A and 560B (FIGS. 25 and 26). It is the same as the connection part 550 of a form. In this configuration, the lower end portion of the long hole portion 760 is the first mark portion 761, and the upper end portion of the long hole portion 760 is the second mark portion 762.

The fall prevention device 701 shown in FIG. 31 is also in the contracted state (the contracted state similar to FIG. 24) in which the fixed rope 790 shown in FIG. 32 is attached to the first base portion 30A and the second base portion 30B. It can be attached in the same way as the prevention device. Specifically, after the fall prevention device 701 contracted by the fixed rope 790 is placed on the upper surface of the furniture F, a predetermined position of the connecting portion 750 (for example, a position below the long hole portion 760) is cut. It can be easily attached as shown in FIG.

As shown in FIG. 31, when the fall prevention device 701 is attached between the ceiling C and the furniture F, the connecting portion 750 forming a part of the fixed rope 790 is suspended from the second base portion 30B. At this time, whether or not the damper 10 has an appropriate length can be confirmed by the connecting portion 750 suspended from the second base portion 30B. For example, if the first mark portion 761 formed on the connecting portion 750 hanging from the second base portion 30B is located above the upper end portion 11A (predetermined portion) of the cylinder 11, the length of the damper 10 is You can see that the maximum length is exceeded. On the contrary, if the first mark portion 761 of the hanging connecting portion 750 is at a position below the upper end portion 11A of the cylinder 11, the length of the damper 10 is within the determined maximum length. Can be confirmed. Further, if the second mark portion 762 formed on the connecting portion 750 depending from the second base portion 30B is located above the upper end portion 11A of the cylinder 11, the length of the damper 10 is determined to be the minimum. It can be confirmed that it is longer than the length. In particular, the fixed cable 790 can be visually recognized from the front side as indicated by the arrow F1, and the position of the upper end portion 11A of the cylinder 11 can be confirmed through the long hole portion 760. For example, when the long hole portion 760 is viewed in the horizontal direction and the upper end portion 11A of the cylinder 11 is seen in the long hole portion 760, it can be confirmed that the mounting state is proper.

The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Embodiments 1 to 7, the fall prevention device is attached to furniture, but it may be attached to an article such as a bookcase or a refrigerator that may fall over due to shaking such as an earthquake.
(2) In the first to seventh embodiments, the fall prevention device is attached to the furniture placed on the floor surface with the back surface facing the wall surface, but is placed on the floor surface without being adjacent to the wall surface. It may be attached to the furniture.
(3) In Embodiment 1, the fixed rope was a string made of chemical fiber. In the second embodiment, the fixed cable has a configuration in which a resin member and a string are used together. In the third to sixth embodiments, the fixed cable is a resin member. However, the material is not limited to such materials, and other materials such as metal may be used as long as they can be unwound or cut.
(4) In the first to seventh embodiments, each base portion connects both end portions of the damper so as to be rotatable around the rotation axis and swingable in a direction intersecting the rotation direction. It does not need to be movably connected or not swayable.
(5) In the first to seventh embodiments, the fixed cable is locked to the bolt head and the nut constituting the rotating shaft member to hold the damper in the contracted state, but the fixed cable is locked to each base part itself. Alternatively, each base portion or damper may be provided with a portion for locking the fixed cable, and the fixed cable may be locked to the portion to hold the damper in a contracted state.
(6) In Embodiments 1 to 7, the pressure damper is used. However, a dual-effect damper may be used as long as it exhibits a predetermined damping force during the contraction operation.
(7) In the first to seventh embodiments, the damper in which the hydraulic oil and the compressed gas are enclosed in the cylinder is used. However, as long as a predetermined damping force is generated during the contraction operation, the liquid pressure in which other liquid is enclosed is used. It may be a damper or another type of damper.
(8) In the first to seventh embodiments, the compressed gas is sealed in the cylinder so that the expansion force of the compressed gas acts in the extension direction. However, the force acting in the extension direction may be generated by other methods.
(9) In the first to seventh embodiments, the overturn prevention device includes the fall prevention unit, but the fall prevention unit may not be provided. Further, the fall prevention part may be formed integrally with the first base part.
(10) In the first to seventh embodiments, the overturn preventing device includes the angle restricting unit. However, the angle restricting unit may not be provided. In Embodiment 1, the angle restricting portion is detachably attached to the first base portion. However, the angle restricting portion may be formed integrally with the first base portion or the cylinder of the damper.
(11) In the third and sixth embodiments, the shape of the entire gripping portion is the direction indication shape, but a part of the shape of the gripping portion may be the direction indication shape. For example, the shape of the gripping portion 680 of the sixth embodiment may be changed to be a bar shape in which only a part is curved toward one base portion side.
(12) In Embodiments 2 to 7, a fixed rope composed partly or entirely of a resin material such as polypropylene is exemplified, but when using a resin material, it is not limited to polypropylene, and various known materials are used. be able to. In this case, it is preferable to use a material whose expansion and contraction is suppressed to some extent.
(13) The configurations of the first to third embodiments may be provided with the first mark portion, the second mark portion, or both. When provided in the configuration of the third embodiment, the first mark portion or the second mark portion may be represented by forming a groove or the like in the fixed cable, and the linear portion 386 at the lower end portion of the gripping portion is formed as the first mark portion. The mark portion may be a corner portion 381 at the upper end of the gripping portion. In this case, the position of the linear portion 386 may be determined so as to be the position of the first mark portion, and the position of the corner portion 381 may be determined so as to be the position of the second mark portion.
(14) In Embodiments 4 to 7, as examples of the first mark part and the second mark part, the first mark part and the second mark part are formed by a groove part, a hole part, a protrusion part, etc. formed in the fixed rope. Although the example which shows a part was shown, it should just be shown that it is a mark different from another site | part. For example, the first mark portion or the second mark portion may be configured in a form with a color or pattern different from the surroundings.

C ... ceiling, F ... furniture (article), 10 ... damper, 11A ... upper end (predetermined part of damper), 30A, 30B ... base (30A ... first base, 30B ... second base), 45, 47 ... Rotating shaft member (45 ... bolt, 47 ... nut), 45A, 47 ... (of the rotating shaft member) both ends (45A ... bolt head, 47 ... nut), 90, 290, 390, 490, 590, 690, 790 ... fixed cable, 220, 320, 620 ... article side connection part, 280, 380, 680 ... grip part, 310, 610 ... ceiling side connection part, 442A, 443A, 642A, 643A ... through hole Part (fixed part), 461, 561, 761 ... first mark part, 462, 562, 762 ... second mark part, 471, 472, 571, 572 ... hole

Claims (11)

1. A damper attached between the top surface of the article installed on the installation surface and the ceiling;
   A pair of base portions connected to each of both end portions of the damper, one abutting against the upper surface of the article and the other abutting against the ceiling;
   A fixed line for holding the damper in a contracted state of a desired length;
   A fall prevention device characterized by comprising:
2. Each of the base portions includes a rotation shaft member that pivotally supports each of both end portions of the damper,
   The fall prevention device according to claim 1, wherein the fixed cable is locked to each of the rotating shaft members.
3. Each rotating shaft member is exposed from each base portion at a position where both end portions are symmetric with respect to the central axis of the damper,
   3. The fixed cable according to claim 2, wherein the fixed cable is engaged with both ends of the rotating shaft member exposed from the base portion on both sides, and extends together at a central portion. 4. Fall prevention device.
4. 4. The overturn prevention device according to claim 1, further comprising an angle restricting portion that is attached to the base portion that is in contact with an upper surface of the article and restricts an inclination angle of the damper.
5. The fixed cable includes a grip portion connected to the base portion that contacts the ceiling, and an article-side connection portion that connects the base portion and the grip portion that contact the upper surface of the article. The fall prevention device according to any one of claims 1 to 3.
6. At least a part of the gripping part is configured with a predetermined direction indicating shape that indicates an arrangement side of either the base part that contacts the ceiling or the base part that contacts the upper surface of the article. The fall prevention device according to claim 5.
7. The fixed cable includes a ceiling-side connecting portion that connects the base portion that contacts the ceiling and the grip portion,
   6. The overturn prevention device according to claim 5, wherein the ceiling side connecting portion is thicker than the article side connecting portion.
8. The fixed rope includes a fixed portion attached to the base portion that contacts the ceiling, and a first mark portion formed at a position away from the fixed portion,
   When the damper has a predetermined maximum length, the first mark portion is in a state in which at least a portion from the fixing portion to the first mark portion hangs down from the base portion contacting the ceiling. The fall prevention device according to any one of claims 1 to 3, wherein the position of the predetermined portion is indicated.
9. The fixed cable includes a second mark portion formed at a position different from the first mark portion,
   When the damper has a predetermined minimum length, the second mark portion has the predetermined portion in a state in which at least a portion from the fixing portion to the second mark portion hangs down from the base portion contacting the ceiling. The fall prevention device according to claim 8, wherein the position of the part is indicated.
10. The fall prevention device according to claim 8, wherein the position of the first mark portion is a cutting position.
11. 4. The fixing cable according to claim 1, wherein a hole penetrating at one position near the base portion and the other position near the base portion is formed in each of the fixed ropes. 5. Fall prevention device.

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