JP2017169856A - Overturn prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overturn prevention device in which a ceiling side base can be attached without forcing minute adjustment of an orientation.SOLUTION: An overturn prevention device 1 comprises: a damper 10; an object side base part 30A which is coupled to a lower end of the damper 10, and which is brought into contact with an upper face of an object (furniture F) and is attached; and a ceiling side base part 30B which is coupled to an upper end of the damper 10 and brought into contact with a ceiling C and is attached. The ceiling side base part 30B is configured so that, a shape of an outer edge part of a contact face 137A contacting the ceiling C is a rotation symmetry pattern of n number symmetry, in which n is a natural number of 3 or larger. A connection part 40B between the damper 10 and the ceiling side base part 30B is provided on a virtual line L1 passing a center of the contact face 137A and orthogonal to the contact face 137A.SELECTED DRAWING: Figure 1

Description

  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 base portions. 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

  In the overturn prevention device of Patent Document 1, the shape of the contact surface (the surface in contact with the ceiling) of the ceiling-side base portion is an elongated rectangular shape. In this way, the fall-preventing device in which the contact surface of the ceiling-side base portion is configured to be elongated can change the mounting stability depending on the orientation of the ceiling-side base portion (that is, the orientation of the longitudinal contact surface). It is necessary to arrange the ceiling side base portion in a direction in which the height becomes higher. In other words, the fall prevention device of Patent Document 1 is required to be installed by an operator while accurately adjusting the direction of the ceiling-side base portion. There is a problem that the work burden increases.

  Moreover, in the fall prevention device of Patent Document 1, once the damper is attached between the upper surface of the article and the ceiling, the ceiling-side base portion is strong against the ceiling due to the elasticity in the extending direction due to the gas pressure of the compressed gas. It will be pressed and held with a strong frictional force. Since it is such a structure, if it attaches a ceiling side base part in the wrong direction, it will become difficult to correct direction after attachment. For example, if the ceiling-side base part is installed in the wrong direction, in order to correct the direction, the ceiling-side base part is moved downward against the biasing force of the damper, and a frictional force is generated between the ceiling-side base part and the ceiling. It is necessary to change the direction of the ceiling side base part. However, the operation of grasping the ceiling-side base portion installed at a high position near the ceiling and moving the ceiling-side base portion downward with a strong force is a very burdensome operation for the operator. Correcting in the desired direction while performing such an operation is a burdensome and difficult task. Because of such a problem, there is a demand for a configuration in which an orientation error is unlikely to occur when the ceiling side base portion is attached.

  The present invention has been made in view of the above-described conventional situation, and it is an object to be solved to provide a fall prevention device capable of attaching a ceiling-side base portion without forcing fine adjustment. .

  The fall prevention device of the present invention is connected to the damper, the lower end portion of the damper, the article side base portion attached in contact with the upper surface of the article, the upper end portion of the damper and attached to the ceiling. And a ceiling-side base portion. The ceiling-side base portion is an n-fold rotationally symmetric figure in which the shape of the outer edge portion of the contact surface in contact with the ceiling is n times symmetrical with n being a natural number of 3 or more, and passes through the center of the contact surface and is orthogonal to the contact surface The connecting portion between the damper and the ceiling side base portion is arranged on the line.

  As in the present invention, if the connecting portion between the damper and the ceiling side base portion is arranged on a virtual line passing through the center of the contact surface and orthogonal to the contact surface, the vicinity of the center of the contact surface in the ceiling side base portion Will be pressed by the damper from the back side. Since the shape of the contact surface of the ceiling side base portion is an n-fold rotationally symmetric figure where n is a natural number of 3 or more, the contact surface of the ceiling side base portion has a structure in which only one direction is long. Instead, the portion where the distance from the center is secured is arranged in a balanced manner in the circumferential direction. In this way, if the back surface near the center of the contact surface is pressed by the damper and the contact surface is arranged in a balanced manner in the circumferential direction, the ceiling side base portion is arranged in various orientations with respect to the ceiling. Even if it is done, it becomes easy to ensure a stable attachment state. Therefore, the operator can attach the fall prevention device between the article and the ceiling without fine adjustment of the direction of the ceiling side base portion.

  In the present invention, the connecting portion may have a structure in which the ceiling side base portion and the upper end portion of the damper are connected by a universal joint. According to this configuration, not only the degree of freedom of the direction of the ceiling-side base part that contacts the ceiling (the degree of freedom of the direction of the contact surface) is increased, but also the degree of freedom of the attitude of the ceiling-side base part with respect to the damper is increased. be able to.

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 an enlarged view which expands and shows a part of FIG. 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 article side base part of the fall prevention device of Embodiment 1. It is a perspective view which shows the damper, article | item side base part, and fall prevention part of the fall prevention apparatus of Embodiment 1. FIG. It is a fragmentary sectional view which shows the damper of Embodiment 1, the goods side base part, and the fall prevention part. It is a fragmentary sectional view which shows the damper of the fall prevention apparatus of Embodiment 1, the goods side base part, and an angle control part. It is the top view which looked at the ceiling side base part of the fall prevention device of Embodiment 1 from the contact surface side. 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 fragmentary sectional view which shows the damper and ceiling side base part of the fall prevention apparatus of Embodiment 2. It is a fragmentary sectional view which shows the damper and ceiling side base part of the fall prevention apparatus of Embodiment 3. (A) is the top view which looked at the ceiling side base part of the fall prevention apparatus of other embodiment from the contact surface side, (B) looked at the ceiling side base part different from (A) from the contact surface side. FIG.

<Embodiment 1>
Embodiment 1 which is an example which actualized the fall prevention apparatus of this invention is demonstrated, referring drawings.

  At least one or more fall prevention devices 1 shown in FIG. 1 are attached between the upper surface of the furniture F and the ceiling C. The furniture F is installed on the floor surface Fr with the back surface facing a wall surface W extending in the vertical direction from the floor surface Fr serving as an installation surface. The furniture F has a rectangular parallelepiped shape, for example, and has a door (not shown), a drawer, and the like 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 1 shown in FIG. 1 is not attached, the furniture F may be tilted forward and tilted due to shaking such as an earthquake.

  As shown in FIGS. 1 and 2, the overturn prevention device 1 includes a damper 10, an article-side base portion 30 </ b> A, a ceiling-side base portion 30 </ b> B, a fall prevention portion 50, and an angle regulating portion 70.

  The damper 10 has a cylinder 11, a rod guide (not shown), a piston (not shown), a rod 13, and two joint portions 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. The rod 13 is inserted through the rod guide and the tip side protrudes outside the cylinder 11. The cylinder 11 encloses hydraulic oil and compressed gas. Each joint portion 15 is formed by bending a flat metal fitting, as shown in FIGS. 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 (FIGS. 4 and 5) penetrating in a direction perpendicular 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. 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 are shortened. In the damper 10, the expansion force of the compressed gas sealed in the cylinder 11 works in the extending direction.

  Since the mechanism for generating the damping force of the damper 10 has a well-known structure, the illustration is omitted. 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 article-side base portion 30 </ b> A is a base portion connected to the lower end portion of the damper 10, and is connected to the joint portion 15 connected to the bottom portion of the cylinder 11. The ceiling-side base portion 30 </ b> B is a base portion that is coupled to the upper end portion of the damper 10, and is coupled to the joint portion 15 that is connected to the distal end portion of the rod 13. The article-side base portion 30 </ b> A is placed on the upper surface of the furniture F and is attached in contact with the upper surface of the furniture F. The ceiling-side base portion 30B is attached in contact with the ceiling C.

  As shown in FIGS. 3 and 4, the article-side base portion 30 </ b> A includes a base portion main body 31, a bolt 45 and a nut 47, which are rotating shaft members, a bush 35, and an anti-slip portion 37. The ceiling side base portion 30 </ b> B includes a base portion main body 131, bolts 45 and nuts 47, bushes 35, and anti-slip portions 137. The structure of the part (the lower connection part 40A) where the article-side base part 30A and the damper 10 are connected is the same as the structure of the part (the upper connection part 40B) where the ceiling-side base part 30B and the damper 10 are connected. It is. Therefore, each part which comprises the lower connection part 40A and the upper connection part 40B is attached | subjected and demonstrated with the same code | symbol.

  In a plan view of the article-side base portion 30A as 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 direction in which the long side extends in the outline of the base body 31 in plan view 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 when the article-side base portion 30A is viewed in the short side direction in a state of being placed in contact with the upper surface of the furniture F, the base portion main body 31 has a linear shape with a lower end edge parallel to the upper surface of the furniture F. The upper end edge is an arc-shaped outer shape that swells upward from both sides of the lower end edge (see FIG. 2). In addition, 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 article side base portion 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. 3 and 4).

  Each of the connecting portions 40A and 40B includes convex portions 43 and 43 formed in the base portion main body, insertion holes 43B and 43B, a bush 35, and a joint portion 15, and both connecting portions 40A and 40B are provided. It has the same structure. Hereinafter, the common structure of the connecting portions 40A and 40B will be described with reference mainly to the lower connecting portion 40B.

  In the article-side 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 on the upper surface in the long side direction (the horizontal direction in FIG. 2 and the depth direction in FIGS. 3 and 4). An elongated groove 41 is formed. In the groove portion 41, the bottom surface 41A is arranged in a predetermined plane direction (a plane direction parallel to the contact surface of the anti-slip portion 37), and the inner wall surface 41B rises substantially vertically 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. 5, 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 center portion in the long side direction. As shown in FIGS. 3 and 4, 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. In the pair of convex portions 43, 43, through holes 43B, 43B through which shaft portions 45B of bolts 45, which will be described later, are inserted, penetrate in the short side direction.

  As shown in FIG. 5, the groove portion 41 has a pair of locked holes 49 formed on the bottom surface 41A. 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 that extends 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 article-side 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 has depressions 42 formed in the center portion in the long side direction and on both sides of the groove portion 41. The recess 42 is open outward in the upward direction and the short side direction. As for the hollow part 42, the penetration hole 43B which penetrated the convex part 43 has opened to the side surface. In the recess 42, a head 45A of a bolt 45 described later and a nut 47 screwed into the bolt 45 are arranged. 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.

  As shown in FIGS. 3 and 4, the rotating shaft member includes a bolt 45 inserted from one of insertion holes 43 </ b> B and 43 </ b> B formed in the pair of convex portions 43 and 43, and a shaft portion 45 </ b> B of the bolt 45. It is comprised from the nut 47 screwed in. The central axis of the bolt 45 becomes the rotation axis of the damper 10 in each base portion 30A, 30B.

  As shown in FIG. 4, the bush 35 is substantially cylindrical. The length of the bush 35 is slightly smaller than the interval between the inner wall surfaces 43A and 43A of the pair of convex portions 43 and 43. 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 45 </ b> B 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. The bush 35 can be tilted with respect to the shaft portion 45B of the bolt 45 as long as the inner peripheral surfaces 35C of both end portions with expanded diameters are in 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 damper 10 can swing more greatly in the direction intersecting the rotation direction due to the dimensional allowance and the diameter increase of the inner peripheral surface 35C. The structure as described above is a structure common to the connecting portions 40A and 40B.

  The article-side base portion 30A and the ceiling-side base portion 30B shown in FIGS. 1 and 2 are slightly different in shapes of portions other than the connecting portions 40A and 40B. The base part body 31 of the article-side base part 30A is configured in a rectangular shape in plan view, and has a hollow structure inside. As shown in FIGS. 3 and 4, the base portion main body 31 opens downward in the article-side 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 includes a plurality of ribs R1 (FIG. 2) extending in parallel to the short side direction and two ribs R2 (FIGS. 3 and 4) extending in parallel to the long side direction. Is formed.

  The anti-slip portion 37 of the article-side base portion 30A is made of, for example, rubber, and has a similar shape (rectangular shape) whose outer shape when viewed in plan is slightly larger than the outer shape when the base portion main body 31 is viewed in plan. It is substantially flat. As shown in FIG. 4, the anti-slip portion 37 is fitted into the lower end opening of the base portion main body 31 in the article-side base portion 30A. The non-slip portion 37 has a flat surface that contacts the upper surface of the furniture F, and the surface facing the opposite side (the surface facing the base portion main body 31) is the outer peripheral wall of the base portion main body 31 and the ribs R1, R2. A fitting groove adapted to the above is formed. The non-slip portion 37 is detachably attached to the base portion main body 31 by its own elastic force.

  The ceiling-side base portion 30B shown in FIGS. 2 and 3 is different from the base portion main body 31 and the anti-slip portion 37 of the article-side base portion 30A in the shape of a part of the base portion main body 131 and the shape of the anti-slip portion 137. . The base portion main body 131 of the ceiling side base portion 30B is configured in a circular shape in plan view, and has a hollow structure inside. As shown in FIGS. 2 and 3, the base body 131 has an opening 131 </ b> A that opens to the opposite side of the connecting portion 40 </ b> B. The opening 131 </ b> A opens upward in the ceiling-side base portion 30 </ b> B installed in contact with the ceiling C. The base portion main body 131 includes a plurality of ribs R3 (FIG. 2) extending in parallel in a predetermined direction and a rib R4 (FIG. 3) extending in a direction perpendicular to the direction of the rib R3. Is formed.

  The anti-slip portion 137 of the ceiling-side base portion 30B is made of rubber, for example, and has a similar shape (circular shape) whose outer shape when viewed in plan is slightly larger than the outer shape when the base portion main body 131 is viewed in plan. It is substantially flat. The anti-slip portion 137 is fitted into the opening 131 </ b> A so as to close the opening 131 </ b> A formed at the upper end of the base portion main body 131. The non-slip portion 137 has a flat contact surface 137A that contacts the ceiling C, and the surface facing the opposite side (the surface facing the base portion main body 131) is the outer peripheral wall of the base portion main body 131 and the ribs R3, R4. A fitting groove adapted to the above is formed. The anti-slip portion 137 is detachably attached to the base portion main body 131 by its own elastic force.

  In FIG. 8, the figure which looked at the ceiling side base part 30B in the direction orthogonal to the contact surface 137A from the contact surface 137A side is shown. The ceiling-side base portion 30B is a rotationally symmetric figure in which the shape of the outer edge portion of the contact surface 137A that contacts the ceiling C is n-fold symmetric with n being a natural number of 3 or more. That is, the outer edge figure of the contact surface 137A has a property of overlapping with itself when rotated around the center P1 by (360 / n) °. Specifically, the entire contact surface 137A is configured to be flat, and the outer edge portion of the contact surface 137A is circular with the center P1 as the center of the circle. That is, the figure formed by the outer edge of the contact surface 137A has a property of overlapping with itself when rotated around the center P1 by (360 / n) ° regardless of any natural number n is 3 or more.

  The ceiling-side base portion 30B has a configuration in which a connecting portion 40B between the damper 10 and the ceiling-side base portion 30B is disposed on a virtual line L1 that passes through the center P1 of the contact surface 137A and is orthogonal to the contact surface 137A. More specifically, the imaginary line L1 passing through the center P1 and orthogonal to the contact surface 137A passes through the center axis L2 of the bolt 45 and intersects with the center axis L2. On the imaginary line L1, the joint portion 15 and the bolt 45 among the components constituting the connecting portion 40B are arranged.

  As shown in FIGS. 2, 5, and 6, the fall prevention unit 50 is formed by bending a plate-like metal or is formed of a resin, and includes a connecting part 51 and a hanging part 53. 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. The connecting portion 51 has a locking portion 51A formed by bending one end portion at a right angle. The hanging portion 53 is continuous with the other end portion of the connecting portion 51, is orthogonal to the connecting portion 51, extends in the same direction as the locking portion 51 </ b> A, and the direction in which the upper side of the fall prevention device 1 is separated from the wall surface W. The length is set so as not to come out between the wall surface W and the back of the furniture F when it falls down. The fall prevention part 50 is attached to the article-side base part 30 </ b> A placed in contact with the upper surface of the furniture F, and the locking part 51 </ b> A of the connecting part 51 is located on the wall surface W side of the base part main body 31. It is inserted into the stop hole 49 and locked. The connecting portion 51 is attached to the base portion main body 31 and extends along the groove portion 41 formed in the base portion main body 31, and the other end is an outer edge of the article side base portion 30A (the article side base portion 30A). It is located outside the outer edge) of the non-slip portion 37. The hanging part 53 hangs from the other end of the connecting part 51 and extends slightly outward from the outer edge of the anti-slip part 37 downward. The fall prevention unit 50 is disposed between the wall surface W and the back surface of the furniture F below the article-side base unit 30A.

  As shown in FIGS. 2, 3, and 7, the angle restricting portion 70 is detachably attached to the article-side base portion 30 </ b> A. The angle restricting portion 70 is attached to the article-side base portion 30 </ b> A, and is provided continuously with a restricting portion 71 extending in a substantially vertical direction and a lower portion of the restricting portion 71, and prevents the restricting portion 71 from tilting. 73. The restricting portion 71 is a flat plate and has a substantially rectangular shape. The restricting portion 71 is a receiving portion 71 </ b> A having one short side positioned at the upper end when the angle restricting portion 70 is attached to the article-side base portion 30 </ b> A placed in contact with the upper surface of the furniture F. The other end portion is an insertion portion 71 </ b> B that is inserted into the locked hole 49 that is located at the lower end and located on the side away from the wall surface W of the base portion main body 31. The restricting portion 71 restricts the damper 10 from being tilted more than the inclined posture when the cylinder 11 of the damper 10 contacts the receiving portion 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. 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.

  As shown in FIG. 7, the insertion portion 71 </ b> B includes inclined surfaces 71 </ b> C and 71 </ b> C in which corners on both sides of the short side are cut away in the long side direction so as to become thinner toward the tip, and one surface of the tip portion. It has a protrusion 71D protruding in the short side direction. The support part 73 includes a first support part 73A and a second support part 73B. The first support portion 73 </ b> A is a flat plate having the same width as the restricting portion 71 and extending in a direction orthogonal to the restricting portion 71. 73 A of 1st support parts are the bottom faces 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 articles | goods side. 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.

Here, the effect of the fall prevention device 1 is illustrated.
The fall prevention device 1 of this configuration has a configuration in which a connecting portion 40B between the damper 10 and the ceiling side base portion 30B is disposed on a virtual line L1 passing through the center P1 of the contact surface 137A and orthogonal to the contact surface 137A. In this configuration, the vicinity of the center P1 of the contact surface 137A in the ceiling side base portion 30B is pressed by the damper 10 from the back side. The shape of the contact surface 137A of the ceiling-side base portion 30B is an n-fold rotationally symmetric figure where n is a natural number of 3 or more. For this reason, the contact surface 137A of the ceiling-side base portion 30B does not have a structure in which only one direction is elongated, and a portion where a distance from the center P1 is secured is arranged in a balanced manner in the circumferential direction. In this way, if the contact surface 137A has a structure in which the vicinity of the back side of the center P1 is pressed by the damper 10 and the contact surface is arranged in a balanced manner in the circumferential direction, the ceiling-side base portion 30B can be Even if it is arranged in various orientations, a stable mounting state is easily secured. Therefore, the operator can attach the fall prevention device 1 between the article (furniture F) and the ceiling C without fine adjustment of the direction of the ceiling side base portion 30B.

  Specifically, in the fall prevention device 1, the shape of the contact surface 137A of the ceiling-side base portion 30B is a circle that is an example of a rotationally symmetric figure. That is, the contact surface 137A has the same radial distance from the center P1 to the outer edge at any position in the circumferential direction. Since it is such a structure, it will be in the same contact state regardless of which contact surface 137A is attached to the ceiling C, and the freedom degree of direction becomes very large. Therefore, the operator's orientation adjustment work can be made unnecessary or extremely easy, and workability can be further improved. Moreover, since a contact area can be ensured as the whole contact surface 137A, the stability at the time of attachment can also be improved.

<Embodiment 2>
Next, the fall prevention device 201 according to the second embodiment will be described with reference to FIGS.
In the fall prevention device 201 of the second embodiment, the ceiling-side base portion 30B is changed to the ceiling-side base portion 230B, and the joint portion 15 connected to the rod 13 is used as the joint portion (first bearing portion 215) of the universal joint 242. Only the changed point is different from the fall prevention device 1 of the first embodiment. Except for these, the fall prevention device 1 of the first embodiment is the same as the fall prevention device 201. Therefore, in the fall prevention device 201, the same parts as the fall prevention device 1 are denoted by the same reference numerals as those of the first fall prevention device 1. Detailed description will be omitted.

  The fall prevention device 201 includes a damper 210 that is attached between the upper surface of the furniture F (article) installed on the installation surface and the ceiling C. The damper 210 is the same as the damper 10 used in Embodiment 1 except that the joint portion 15 is changed to the first bearing portion 215. The article-side base portion 30A is the same as that of the first embodiment, is connected to the lower end portion (joint portion 15) of the damper 210, and is attached in contact with the upper surface of the furniture F (article).

  The ceiling-side base portion 230B is connected to the upper end portion of the damper 210 (the first bearing portion 215 that is a joint portion), and is attached in contact with the ceiling C. The ceiling-side base portion 230B also has an opening 131A having the same shape as that of the first embodiment in the base portion main body 231, and a non-slip portion 137 similar to that of the first embodiment is attached to the opening 131A. It has been. The contact surface 137A of the ceiling-side base portion 230B is the same as that in FIG. 8, and the shape of the outer edge portion of the contact surface 137A is an n-fold rotationally symmetric figure where n is a natural number of 3 or more. Yes. Specifically, the entire contact surface 137A is configured to be flat, and the outer edge portion of the contact surface 137A is circular with the center P1 as the center of the circle. The outer edge figure of the contact surface 137A has a property of overlapping with itself when rotated around (360 / n) ° around the center P1 regardless of any natural number n is 3 or more.

  As shown in FIGS. 9 and 10, the connecting portion 240 </ b> B has a structure in which the ceiling-side base portion 230 </ b> B and the upper end portion of the damper 210 are connected by a universal joint 242. The universal joint 242 is configured as a cross joint (cardan joint), and the shaft portion 250 formed on the base portion main body 231 of the ceiling-side base portion 230B and the rod 13 of the damper 210 are freely changed in angle of both members. Linked to get. The base portion main body 231 of this configuration includes a rib R4 similar to that of the base portion main body 31 used in the first embodiment, and a shaft portion 250 is connected to the rib R4. The shaft portion 250 protrudes in a direction orthogonal to the direction of the contact surface 137A, for example, and a second bearing portion 252 is formed in the vicinity of the tip portion of the shaft portion 250.

  The universal joint 242 includes a first bearing portion 215 connected to the rod 13, a cross spider 244, and a second bearing portion 252 formed on the shaft portion 250. The second bearing portion 252 is a pair of hole portions 252A that fits with a pair of protrusions 244C and 244D (a pair of protrusions protruding along a predetermined first direction in the cross spider 244) formed on the cross spider 244. , 252A. The second bearing portion 252 supports the protrusions 244C and 244D in a rotatable manner while maintaining the direction of the pair of protrusions 244C and 244D in a direction parallel to the contact surface 137A. The second bearing portion 252 restricts the movement of the protrusions 244C and 244D in the axial direction (projection direction) and restricts the movement in the direction orthogonal to the axial direction. The first bearing portion 215 is a pair of hole portions 215A and 215A that are fitted with a pair of protrusion portions 244A and 244B (a pair of convex portions protruding along a second direction orthogonal to the first direction) of the cross spider 244. Have The first bearing portion 215 supports the protrusions 244A and 244B in a rotatable manner while maintaining the direction of the pair of protrusions 244A and 244B in a direction orthogonal to the direction of the rod 13. The first bearing portion 215 restricts the movement of the protrusions 244A and 244B in the axial direction (projection direction) and restricts the movement in the direction orthogonal to the axial direction.

  The ceiling-side base portion 230B configured as described above is a connecting portion between the damper 210 and the ceiling-side base portion 230B on an imaginary line L1 passing through the center P1 (FIG. 8) of the contact surface 137A and orthogonal to the contact surface 137A. 240B is arranged. Specifically, the shaft portion 250 and a part of the universal joint 242 (cross spider 244) are arranged on the virtual line L1.

  According to the fall prevention device 201 of this configuration, not only the degree of freedom in the direction of the ceiling side base part 230B that contacts the ceiling C (the degree of freedom in the direction of the contact surface 137A) is increased, but also the ceiling side base part with respect to the damper 210 The degree of freedom of the posture of 230B can also be increased.

<Embodiment 3>
Next, the fall prevention device 301 of the third embodiment will be described with reference to FIG.
In the fall prevention device 301 of the third embodiment, the ceiling side base portion 30B is changed to the ceiling side base portion 330B, and the joint portion 15 connected to the rod 13 is changed to the joint portion (metal ball 315) of the universal joint 342. Only the point differs from the fall prevention device 1 of the first embodiment. Except for these, the fall prevention device 1 according to the first embodiment is the same as the fall prevention device 1. Detailed description will be omitted.

  The fall prevention device 301 includes a damper 310 that is attached between the upper surface of the article installed on the installation surface and the ceiling C. The damper 310 is the same as the damper 10 used in Embodiment 1 except that the upper joint portion 15 (FIG. 1 and the like) is changed to a metal ball 315. This overturn prevention device 301 also has the same article-side base portion as in the first embodiment (base portion having the same structure as the article-side base portion 30A shown in FIG. 1 and the like). The article-side base portion is also connected to the lower end portion of the damper 310 (a joint portion having the same structure as the joint portion 15 shown in FIG. 1 and the like) and attached in contact with the upper surface of the article.

  As shown in FIG. 11, the ceiling-side base portion 330 </ b> B is connected to the upper end portion (metal sphere 315 that is a joint portion) of the damper 310 and is attached in contact with the ceiling C. The ceiling-side base portion 330B also has an opening 131A having the same shape as that of the first embodiment in the base portion main body 331, and a non-slip portion 137 similar to that of the first embodiment is attached to the opening 131A. It has been. The contact surface 137A of the ceiling-side base portion 330B is the same as in FIG. 8, and the shape of the outer edge portion of the contact surface 137A is an n-fold rotationally symmetric figure where n is a natural number of 3 or more. Yes. Specifically, the entire contact surface 137A is configured to be flat, and the outer edge portion of the contact surface 137A is circular with the center P1 as the center of the circle. The outer edge figure of the contact surface 137A has a property of overlapping with itself when rotated around (360 / n) ° around the center P1 regardless of any natural number n is 3 or more.

  As shown in FIG. 11, the connecting portion 340 </ b> B has a structure in which the ceiling-side base portion 330 </ b> B and the upper end portion of the damper 310 are connected by a universal joint 342. The universal joint 342 includes a metal ball 315 connected to the rod 13, a socket part 344 that forms a part of the base part body 331, and a ring member 346 that is assembled to the socket part 344, and is configured as a ball joint. . Specifically, the rod 13 and the metal ball 315 function as a ball stud, and the inner peripheral surface 344A of the socket portion 344 is in spherical contact with the metal ball 315. The base portion main body 331 includes a rib R4 similar to the base portion main body 31 used in the first embodiment, and a socket portion 344 is connected to the rib R4. The socket portion 344 inserts a metal ball 315. The opening part for doing is formed in the form open | released below. A ring member 346 for preventing the metal ball 315 from coming off is assembled to the lower end portion of the recess (portion for housing the metal ball 315) formed in the socket portion 344. The connecting portion 340B configured in this manner connects the damper 310 and the ceiling-side base portion 330B so that the direction of inclination of the damper 310 with respect to the contact surface 137A can be changed in multiple directions.

  The ceiling-side base portion 330B configured in this way is a connecting portion between the damper 310 and the ceiling-side base portion 330B on a virtual line L1 passing through the center P1 (FIG. 8) of the contact surface 137A and orthogonal to the contact surface 137A. 340B is arranged. Specifically, the socket portion 344 and the metal ball 315 are arranged on the virtual line L1.

  Also in the fall prevention device 301 of this configuration, not only the degree of freedom in the direction of the ceiling side base portion 330B that contacts the ceiling C (the degree of freedom in the direction of the contact surface 137A) is increased, but also the ceiling side base portion 330B with respect to the damper 310 is increased. The degree of freedom of posture can also be increased.

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 3, the fall prevention device is attached to furniture. However, the fall prevention device 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 third embodiments, the fall prevention device is attached to the furniture placed on the floor surface with the rear surface facing the wall surface, but placed on the floor surface without being adjacent to the wall surface. It may be attached to the furniture.
(3) In Embodiments 1 to 3, 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.
(4) In the first to third embodiments, the damper in which the hydraulic oil and the compressed gas are sealed in the cylinder is used. However, the liquid pressure in which other liquid is sealed as long as a predetermined damping force is generated during the contraction operation. It may be a damper or another type of damper.
(5) In the first to third embodiments, the compressed gas is sealed in the cylinder so that the expansion force of the compressed gas works in the extension direction. However, the force acting in the extension direction may be generated by other methods.
(6) In the first to third embodiments, the fall 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 article side base part.
(7) In the first to third embodiments, the overturn prevention device includes the angle restriction unit, but the angle restriction unit may not be provided. Further, the angle restricting portion may be formed integrally with the article-side base portion or the damper cylinder.
(8) In Embodiments 1 to 3, a circular shape is illustrated as a rotationally symmetric graphic, but a graphic other than this may be used. For example, the anti-slip part 137 shown in the first to third embodiments may be changed as shown in FIG. 12A has a flat contact surface 137A, and the outer edge of the contact surface 137A is a regular hexagon centered on P1. The outer edge shape of the contact surface 137A is also an n-fold rotationally symmetric figure where n is a natural number of 3 or more. Specifically, n = 6, and the outer edge figure of the contact surface 137A overlaps itself when rotated around the center P1 by (360/6) °. In addition, in the structure of Embodiments 1-3, when applying the anti-slip | skid part 137 like FIG. For example, the base part main body of the ceiling side base part has an outer shape of the opening part (an end part to which the anti-slip part 137 is attached) when viewed in plan is slightly smaller than the outer diameter when the non-slip part 137 is viewed in plan. A similar shape may be used. Although FIG. 12A illustrates a contact surface whose outer edge is a regular hexagon, the outer edge of the contact surface may be a regular polygon other than a regular hexagon, such as a regular triangle, a regular square, a regular pentagon, or a regular heptagon. . Or the figure etc. which curved the corner | angular part of the regular polygon with the same curvature may be sufficient.
(9) In the first to third embodiments, a circular shape is illustrated as the outer edge graphic (rotationally symmetric graphic) of the contact surface of the ceiling-side base portion, but the outer edge graphic of the contact surface has left and right sides of five or more regular polygons. It may be an outer edge figure of a figure (comet figure) extended to. For example, the anti-slip portion 137 shown in the first to third embodiments may be changed as shown in FIG. 12B has a flat contact surface 137A, and the outer edge of the contact surface 137A is a dodecagon with P1 as the center. The outer edge of the contact surface 137A shown in FIG. 12B is a so-called hexagonal figure outer edge shape, and the outer edge shape of the contact surface 137A is also an n-fold rotationally symmetric figure where n is a natural number of 3 or more. is there. Specifically, n = 6, and the outer edge figure of the contact surface 137A overlaps itself when rotated around the center P1 by (360/6) °. In addition, in the structure of Embodiments 1-3, also when applying the anti-slip | skid part 137 like FIG. For example, the base part main body of the ceiling side base part has an outer shape of the opening part (an end part to which the anti-slip part 137 is attached) when viewed in plan is slightly smaller than the outer diameter when the non-slip part 137 is viewed in plan. A similar shape may be used. FIG. 12B illustrates a contact surface whose outer edge is a hexagonal star shape, but the outer edge of the contact surface may be an outer shape such as a pentagram, a seven-pointed star, or an eight-pointed star. Good. Or the figure etc. which curved the convex part of such a comet figure with the predetermined curvature may be sufficient.
(10) In the first to third embodiments, the shape of the outer edge portion of the contact surface of the ceiling-side base portion is configured to be an n-fold rotationally symmetric figure where n is a natural number of 3 or more. May be configured similarly to the ceiling-side base portion of any one of the first to third embodiments. In other words, the shape of the outer edge portion of the contact surface (the surface in contact with the article) of the article-side base may be an n-fold rotationally symmetric figure with n being a natural number of 3 or more. For example, the contact surface of the article-side base portion may have a shape as shown in FIGS. 8 and 12, and the lower end portion of the base portion main body of the article-side base portion may have a similar shape (similar shape in plan view). In this case, it is preferable that the connecting portion between the damper and the article-side base portion is disposed on a virtual line passing through the center of the contact surface of the article-side base portion and orthogonal to the contact surface.

  1, 201, 301 ... Fall prevention device, 10, 210, 310 ... Damper, 30A ... Article side base, 30B, 230B, 330B ... Ceiling side base, 137A ... Contact surface, 40B, 240B, 340B ... Connection part, 242, 342 ... Universal joint, C ... Ceiling, F ... Furniture (article), Fr ... Floor surface (installation surface)

Claims (2)

A damper attached between the top surface of the article installed on the installation surface and the ceiling;
An article-side base portion connected to the lower end of the damper and attached in contact with the upper surface of the article;
The shape of the outer edge portion of the contact surface that is connected to the ceiling and is in contact with the ceiling and is in contact with the ceiling is an n-fold rotationally symmetric figure where n is a natural number of 3 or more. A ceiling-side base portion having a configuration in which a connecting portion with the damper is disposed on an imaginary line passing through the center of the contact surface and orthogonal to the contact surface;
A fall prevention device characterized by comprising:   The fall prevention device according to claim 1, wherein the connecting portion has a structure in which the ceiling-side base portion and the upper end portion of the damper are connected by a universal joint.

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