JP2017225539A - Overturning prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a user to attach an overturning prevention device in a correct vertical posture in attaching the overturning prevention device.SOLUTION: An overturning prevention device includes: a damper 10 having a cylinder 11, a rod guide 12 that blocks an opening of the cylinder 11, a piston 13 slidably housed in the cylinder 11, a rod 14, and hydraulic fluid Y and compressed gas sealed in the cylinder 11; a first base part 30A connected to the bottom edge of the cylinder 11 and in contact with the top face of furniture F; and a second base part 30B connected to the tip of the rod 14 and in contact with the ceiling C. The first base part 30A is made heavier than the second base part 30B by a weight 61.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 that expands and contracts to generate a damping force and a pair of base portions. The fall prevention device 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 forward due to a shake such as an earthquake, the fall prevention device is configured such that the damper rotates around the rotation axis with respect to each base part and expands and contracts, and each base part extends to the top surface and ceiling of the furniture. It is possible to maintain a state in contact with. Therefore, this fall prevention device can prevent the furniture from falling by suppressing the inclination of the furniture by the damping force of the damper.
Incidentally, hydraulic oil is sealed in the cylinder of the damper. In order for the damper to generate a damping force at the time of compression, the damper needs to maintain a state where the cylinder is on the lower side and the rod is on the upper side. If the rod is mounted upside down with the rod on the bottom and the cylinder on the top, damping force cannot be generated during compression.

Japanese Patent Laying-Open No. 2015-6330

  However, in the conventional fall prevention device, there is a risk that the user may mistakenly install it upside down.

  This invention is made | formed in view of the said conventional situation, Comprising: When attaching a fall prevention apparatus, it aims at guiding a user to attach correctly the upper and lower sides of a fall prevention apparatus.

  The fall prevention device of the present invention is connected to the damper, the lower end of the cylinder of the damper, the first base portion that directly or indirectly contacts the upper surface of the article, the tip of the rod of the damper, and directly to the ceiling And a second base portion that abuts indirectly or indirectly. The damper has a cylindrical cylinder with a bottom, a rod guide that seals the opening of the cylinder, a piston that is slidably accommodated in the cylinder, and a base end that is coupled to the piston. A rod that is movably inserted and has a tip projecting outside the cylinder, and a working liquid and gas sealed in the cylinder. The first base portion is heavier than the second base portion.

  In this fall prevention device, since the first base portion is heavier than the second base portion, the user places the first base portion on the lower side and the second base portion on the upper side when attaching the fall prevention device. Be guided to. Thus, since the user is guided to correctly attach the top and bottom of the overturn prevention device, the possibility of attaching the device upside down is reduced, and the possibility of leakage of hydraulic oil is suppressed.

  Here, the articles include furniture, bookcases, refrigerators, showcases, server racks, beds in which a plurality of beds are connected in the vertical direction, large televisions, and the like that may fall over due to shaking such as an earthquake.

  In the fall prevention device of the present invention, it is possible to adopt a mode in which a weight is attached to the first base portion. The first base portion can be reliably made heavier than the second base portion with a relatively simple configuration of attaching a weight.

  In the fall prevention device of the present invention, it is possible to adopt a mode in which the first base portion has a solid structure and the second base portion has a hollow structure. When the first base part has a solid structure and the second base part has a hollow structure, the first base part and the second base part have little difference in appearance and are difficult to visually distinguish. Even so, the weight when holding the first base portion and the second base portion is different, so that the first base portion and the second base portion are surely distinguished and the top and bottom of the fall prevention device are correctly attached. Can be guided.

  In the overturn prevention device of the present invention, the first base portion can adopt a larger aspect than the second base portion. By making the first base portion larger than the second base portion, not only the difference in weight when the first base portion and the second base portion are held, but also the visual representation of the first base portion and the second base portion. From the difference, the user can be surely distinguished from the first base portion and the second base portion, and can be guided to attach the top and bottom of the fall prevention device more correctly.

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 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 state which attached the fall prevention apparatus of Embodiment 3 between the upper surface of furniture, and the ceiling.

  A first embodiment in which the fall prevention device of the present invention is embodied will be described with reference to the drawings.

<Embodiment 1>
As shown in FIGS. 1 and 2, the overturn prevention device 1 of Embodiment 1 includes a damper 10, a first base portion 30 </ b> A, and a second base portion 30 </ b> B. At least one or more fall prevention devices 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 parallelepiped shape whose 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.

  The damper 10 has the cylinder 11, the rod guide 12, the piston 13, the rod 14, and the two joint parts 16 provided in both ends, as shown in FIGS. The cylinder 11 has a bottomed cylindrical shape. The rod guide 12 seals the opening of the cylinder 11. The piston 13 is slidably inserted into the cylinder 11. The rod 14 has a base end connected to the piston 13. Further, the rod 14 is inserted through the rod guide 12, and the tip side protrudes to the outside of the cylinder 11. The piston 13 partitions the inside of the cylinder 11 into a rod side pressure chamber 11B in which the base end portion of the rod 14 is housed and an anti-rod side pressure chamber 11A. The damper 10 encloses a predetermined amount of hydraulic oil Y and a predetermined amount of compressed gas G in the cylinder 11.

  In the fall prevention device 1 provided with the damper 10, the rod 14 protrudes upward from the cylinder 11, and the central axis of the cylinder 11 and the rod 14 is inclined at an angle between 65 ° and 75 ° with respect to the horizontal plane. It is attached between the upper surface of the furniture F and the ceiling C.

  The damper 10 is a pressure damper in which the damping force generated during the contracting operation is larger than the damping force generated during the extending operation. Here, the extension operation of the damper 10 means an operation in which the protruding length of the rod 14 from the cylinder 11 (the entire length of the damper 10) becomes longer. In addition, the contraction operation of the damper 10 means an operation in which the protruding length of the rod 14 from the cylinder 11 (the entire length of the damper 10) is shortened. In the damper 10, the gas pressure of the compressed gas G sealed in the cylinder 11 works in the extending direction. In FIG. 2, the symbol B indicates a boundary line between the compressed gas G and hydraulic oil Y described later.

  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 by a piston 13 into a rod-side pressure chamber 11B in which the base end portion of the rod 14 is housed and an anti-rod-side pressure chamber 11A. The piston 13 is formed with an orifice (not shown) that allows communication between the two pressure chambers. The orifice functions as a damping force generating unit that applies a resistance to the flow of the hydraulic oil Y between the rod-side pressure chamber 11B and the anti-rod-side pressure chamber 11A accompanying the expansion / contraction operation of the damper 10 to generate a damping force. Further, the piston 13 is formed with a communication passage that communicates between the pressure chambers via a check valve (not shown). The check valve allows the flow of the hydraulic oil Y from the rod-side pressure chamber 11B to the anti-rod-side pressure chamber 11A and blocks the reverse flow. For this reason, when the damper 10 is extended, the flow path of the hydraulic oil Y from the rod-side pressure chamber 11B to the anti-rod-side pressure chamber 11A becomes a path between the orifice and the communication path. On the other hand, when the damper 10 is contracted, the flow path of the hydraulic oil Y from the non-rod side pressure chamber 11A to the rod side pressure chamber 11B 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.

  Each joint portion 16 is formed by bending a flat metal fitting as shown in FIGS. Each joint 16 is connected to the bottom of the cylinder 11 and the tip of the rod 14. Each joint portion 16 is formed with a through hole penetrating in a direction orthogonal to the axis of the damper 10.

  As shown in FIGS. 1 and 2, the first base portion 30 </ b> A is connected to the bottom of the cylinder 11 via a joint portion 16. The 2nd base part 30B is connected to the front-end | tip part of the rod 14 via the joint part 16, as shown in FIG.1 and FIG.2. 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 substantially the same outer shape. The first base portion 30 </ b> A and the second base portion 30 </ b> B each include a base portion main body 31, a bolt 51 and a nut 52 that are rotating shaft members, a bush 55, and an anti-slip portion 37.

  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 FIG. 2).

  In the first base portion 30A in a state of being placed in contact with the top surface of the furniture F, as shown in FIG. 2, the base portion main body 31 is in the long side direction (the left-right direction in FIG. A groove portion 32 extending in the depth direction) is formed.

  In the first base portion 30A that is placed in contact with the upper surface of the furniture F, as shown in FIGS. 1 and 2, the base portion main body 31 is a central portion in the long side direction, and includes the groove portion 32. Indentations 33 are formed on both sides. The depression 33 is open outward in the upward direction and the short side direction. Further, the recess 33 has an insertion hole 35 penetrating in the short side direction and opened on the side surface. In addition, the recess 33 is provided with a head 51A of a bolt 51 described later and a nut 52 screwed into the bolt 51. The recess 33 is formed so as to spread upward in the long side direction so that the tool can be fitted to the head 51A and the nut 52 of the bolt 51 from above.

  As shown in FIG. 2, the rotating shaft member includes a bolt 51 inserted from one of the insertion holes 35 of the base body 31 and a nut 52 screwed into the shaft 51 </ b> B of the bolt 51. . The central axis of the bolt 51 becomes the rotational axis of the damper 10 in each base portion 30A, 30B.

  As shown in FIG. 2, the bush 55 is attached to a through hole formed in the joint portion 16 of the damper 10. The bush 55 is rotatable in the circumferential direction of the shaft portion 51B of the bolt 51. Further, the bush 55 can be inclined with respect to the shaft portion 51 </ b> B of the bolt 51. That is, the damper 10 having the bush 55 attached to the joint portion 16 is rotatable in the circumferential direction of the shaft portion 51B of the bolt 51 and is swingable in a direction crossing the rotation direction.

  As shown in FIGS. 1 and 2, the anti-slip portion 37 has a similar (rectangular) outer shape that is slightly larger than the outer shape of the base portion main body 31. The anti-slip portion 37 is made of a material having a high friction coefficient. For example, the anti-slip part 37 may be formed of rubber or a resin material and may have irregularities on the surface. Further, the anti-slip portion 37 is fitted to 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 upper surface of the furniture F or a surface that contacts the ceiling C. The anti-slip portion 37 is detachably attached to the base portion main body 31 by its elastic force.

  In the first base portion 30 </ b> A, a weight 61 is attached to the base portion main body 31. The weight 61 is built in the base body 31. On the other hand, in the second base portion 30B, the weight 61 is not attached to the base portion main body 31. Therefore, the first base portion 30A is heavier than the second base portion 30B. The weight of the weight 61 is appropriately selected so that the first base portion 30A to which the weight 61 is attached feels heavier than the second base portion 30B when the user holds it by hand.

  As described above, the overturn prevention device 1 according to the first embodiment is connected to the damper 10, the lower end of the cylinder 11 of the damper 10, the first base portion 30 </ b> A that contacts the upper surface of the furniture F, and the rod 14 of the damper 10. And a second base portion 30B that contacts the ceiling C. The damper 10 includes a bottomed cylindrical cylinder 11, a rod guide 12 that seals the opening of the cylinder 11, a piston 13 that is slidably housed in the cylinder 11, and a base end that is coupled to the piston 13. The rod 14 is slidably inserted through the rod guide 12, and has a rod 14 whose front end protrudes to the outside of the cylinder 11, and hydraulic oil Y and compressed gas G sealed in the cylinder 11. The first base portion 30A is heavier than the second base portion 30B by the weight 61.

  In this overturn prevention device 1, since the first base portion 30A is heavier than the second base portion 30B, when the user attaches the overturn prevention device 1, the first base portion 30A is placed on the lower side, and the second base portion It is naturally induced so that 30B is on the upper side. Thus, since the user is guided to correctly attach the top and bottom of the overturn prevention device 1, the possibility of attaching the apparatus upside down is reduced, and the possibility that the hydraulic oil Y leaks is suppressed.

That is, when the user attaches the fall prevention device 1 between the upper surface of the furniture F and the ceiling C, the following is performed.
When the user lifts the fall prevention device 1, the first base portion 30A is heavier than the second base portion 30B, so that the first base portion 30A is naturally lowered, and the second base portion 30B is naturally It goes up. From this state, when the user attaches the fall prevention device 1 between the upper surface of the furniture F and the ceiling C, the upper and lower sides of the fall prevention device 1 are correctly attached, and the possibility of being attached upside down is reduced. Therefore, the possibility that hydraulic fluid leaks from the damper 10 is suppressed.

  In the first embodiment, in the first base portion 30A, the weight 61 is built in the base portion main body 31, so that the appearance of the first base portion 30A is not impaired.

<Embodiment 2>
Next, a fall prevention device according to Embodiment 2 will be described with reference to FIG. Note that, in the fall prevention device 101 according to the second embodiment, the same reference numerals are given to substantially the same components as the fall prevention device of the first embodiment, and the description of the structure, operation, and effect is omitted. The second embodiment is different from the first embodiment in the following points.
That is, in the second embodiment, the weight 61 is not attached to any of the first base portion 130A and the second base portion 130B. Instead, a solid structure is adopted for the base part body 131 of the first base part 130A, and a hollow structure is adopted for the base part body 131 of the second base part 130B. The base portion main body 131 of the second base portion 130B has a hollow portion 163, which is lighter than the base portion main body 131 of the first base portion 130A. The cavity 163 is partitioned by a wall 165 into a plurality of rooms. The wall part 165 functions as a rib for reinforcement.

  By adopting a solid structure for the first base portion 130A and adopting a hollow structure for the second base portion 130B, the first base portion 130A and the second base portion 130B have no significant difference in appearance, and visually Even if it is difficult to distinguish, the weight when holding the first base portion 130A and the second base portion 130B is different, and the first base portion 130A and the second base portion 130B are surely distinguished from each other. Thus, it can be guided so that the upper and lower sides of the fall prevention device 101 are correctly attached.

<Embodiment 3>
Next, a fall prevention device according to Embodiment 3 will be described with reference to FIG. Note that in the fall prevention device 201 according to the third embodiment, the same reference numerals are given to substantially the same components as the fall prevention device of the first embodiment, and the description of the structure, operation, and effect is omitted. The third embodiment is different from the first embodiment in the following points.
That is, in Embodiment 3, the weight 61 is not attached to either the first base portion 230A or the second base portion 230B. Instead, the first base portion 230A is larger than the second base portion 230B. In this aspect, the first base portion 230A is heavier than the second base portion 230B.

  In the fall prevention device 201 of the third embodiment, by making the first base portion 230A larger than the second base portion 230B, only the difference in weight when the first base portion 230A and the second base portion 230B are held can be obtained. First, because of the visual difference between the first base portion 230A and the second base portion 230B, the user can be sure to distinguish between the first base portion 230A and the second base portion 230B, and the top and bottom of the fall prevention device 1 can be moved up and down. Can be guided to install more correctly.

<Other embodiments>
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 described above, the fall prevention device is attached to the furniture F. However, the fall prevention device may be attached to an article such as a bookshelf or a refrigerator that may fall over due to shaking such as an earthquake.
(2) The number of fall prevention devices attached between the upper surface of the article and the ceiling is not particularly limited, and is appropriately selected according to the type of the article.
(3) In Embodiments 1 to 3 described above, the pressure damper 10 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 embodiment described above, the weight 61 is built in the base portion main body 31, but the weight 61 may be attached to a place where it can be seen from the outside.
(5) In the third embodiment described above, the first base portion 230A and the second base portion 230B have substantially similar shapes, but may not necessarily be similar. In addition, when a similar shape is employed, the appearance of the overturn prevention device is clean and advantageous in design.
(6) In Embodiments 1 to 3 described above, the first base portions 30A, 130A, and 230A are in direct contact with the upper surface of the furniture F (article). , 230A may abut on the upper surface of the furniture F (article) indirectly via a raising member or the like.
(7) In Embodiments 1 to 3 described above, the second base portions 30B, 130B, and 230B are in direct contact with the ceiling C. However, the second base portions 30B, 130B, and 230B are bulky. You may contact | abut to the ceiling C indirectly via a raising member etc.

  DESCRIPTION OF SYMBOLS 1 ... Fall prevention device, 10 ... Damper, 11 ... Cylinder, 12 ... Rod guide, 13 ... Piston, 14 ... Rod, 30A, 130A, 230A ... 1st base part, 30B, 130B, 230B ... 2nd base part, F ... Furniture (articles), C ... Ceiling, Y ... Working oil (working liquid), G ... Compressed gas (gas)

Claims (4)

A bottomed cylindrical cylinder;
A rod guide that blocks the opening of the cylinder;
A piston slidably housed in the cylinder;
A base end portion is connected to the piston, a rod that is slidably inserted through the rod guide, and a distal end side protrudes to the outside of the cylinder; and
A damper having working liquid and gas sealed in the cylinder;
A first base connected to the lower end of the cylinder and directly or indirectly contacting the upper surface of the article;
A second base part connected to the tip of the rod and directly or indirectly abutting against the ceiling,
The fall prevention device according to claim 1, wherein the first base portion is heavier than the second base portion.   The fall prevention device according to claim 1, wherein a weight is attached to the first base portion. The first base portion has a solid structure;
The overturn prevention device according to claim 1, wherein the second base portion has a hollow structure.   The fall prevention device according to any one of claims 1 to 3, wherein the first base portion is larger than the second base portion.

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