WO2017169295A1 - Damper and fall prevention device with said damper - Google Patents

Damper and fall prevention device with said damper Download PDF

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Publication number
WO2017169295A1
WO2017169295A1 PCT/JP2017/006290 JP2017006290W WO2017169295A1 WO 2017169295 A1 WO2017169295 A1 WO 2017169295A1 JP 2017006290 W JP2017006290 W JP 2017006290W WO 2017169295 A1 WO2017169295 A1 WO 2017169295A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
chamber
damper
cylinder part
cylinder portion
Prior art date
Application number
PCT/JP2017/006290
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French (fr)
Japanese (ja)
Inventor
伸一 関根
太田　晶久
Original Assignee
Ｋｙｂ株式会社
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Filing date
Publication date
Application filed by Ｋｙｂ株式会社 filed Critical Ｋｙｂ株式会社
Publication of WO2017169295A1 publication Critical patent/WO2017169295A1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details

Definitions

  • the present invention relates to a damper and a fall prevention device including the damper.
  • Patent Document 1 discloses a fall prevention device equipped with a conventional damper.
  • the damper includes a cylinder, a rod guide, a piston, and a rod.
  • the cylinder has a bottomed cylindrical shape.
  • the rod guide seals the opening of the cylinder.
  • the piston is slidably accommodated in the cylinder.
  • the rod has a proximal end connected to the piston, slidably inserted through the rod guide, and a distal end protruding outside the cylinder.
  • the damper also encloses hydraulic oil and compressed gas in the cylinder. This damper comprises the fall prevention apparatus attached between the upper surface of furniture, and a ceiling.
  • This overturn prevention device is configured such that the bottom of the cylinder of the damper is positioned below the opening, the rod projects upward from the cylinder, and the center axis of the cylinder and the rod is inclined at a predetermined angle with respect to the horizontal plane. It is attached between the upper surface and the ceiling.
  • this fall prevention device when the furniture is tilted due to shaking such as an earthquake, the damping force generated by the movement of the piston of the damper in the hydraulic oil acts on the furniture to suppress the tilt of the furniture, and the furniture falls Can be prevented.
  • the piston of this damper can move not only in the hydraulic oil but also in the compressed gas sealed above the hydraulic oil.
  • the damper cannot generate a damping force even if the piston moves in the compressed gas. That is, this damper cannot generate a damping force over the entire stroke range.
  • the fall prevention device provided with this damper is arranged in a state where the piston is disposed in the compressed gas sealed above the hydraulic oil, and the upper surface and the ceiling of the furniture. There is a risk of being attached between.
  • the anti-tip device is installed with the piston placed in compressed gas, when the furniture is tilted due to shaking such as an earthquake, the damper will contract until the piston moves into the hydraulic fluid. Does not occur. For this reason, this fall prevention device may cause the furniture to fall without the damping force of the damper acting effectively on the furniture.
  • the present invention has been made in view of the above-described conventional situation, and provides a damper that generates a damping force in the entire stroke range, and by providing the damper, it is possible to satisfactorily prevent an article from falling over. Providing a fall prevention device that can be used is a problem to be solved.
  • the damper of the first invention includes a first cylinder part, a second cylinder part, a partition member, a rod guide, a first piston, a rod, and a second piston.
  • the first cylinder part is cylindrical. One end of the second cylinder portion communicates with the first cylinder portion.
  • the second cylinder part has a cylindrical shape with the other end closed.
  • the partition member is provided at a boundary portion between the first cylinder portion and the second cylinder portion. Further, the partition member has a communication path that communicates the first cylinder part and the second cylinder part.
  • the rod guide seals the opening that opens at the end of the first cylinder.
  • the first piston is slidably accommodated in the first cylinder portion filled with the working liquid.
  • first piston partitions the inside of the first cylinder portion into a first chamber and a second chamber.
  • the rod has a proximal end connected to the first piston. Further, the rod is slidably inserted through the rod guide, and the tip side protrudes outside the first cylinder portion.
  • the second piston is slidably accommodated in the second cylinder part. The second piston communicates with the second chamber and divides the inside of the second cylinder portion into a third chamber filled with the working liquid and a fourth chamber filled with gas.
  • the damper of the second invention includes a first cylinder part, a second cylinder part, a partition member, a rod guide, a first piston, a rod, and a bag.
  • the first cylinder part is cylindrical.
  • One end of the second cylinder portion communicates with the first cylinder portion.
  • the second cylinder part has a cylindrical shape with the other end closed.
  • the partition member is provided at a boundary portion between the first cylinder portion and the second cylinder portion. Further, the partition member has a communication path that communicates the first cylinder part and the second cylinder part.
  • the rod guide seals the opening that opens at the end of the first cylinder.
  • the first piston is slidably accommodated in the first cylinder portion filled with the working liquid.
  • first piston partitions the inside of the first cylinder portion into a first chamber and a second chamber.
  • the rod has a proximal end connected to the first piston. Further, the rod is slidably inserted through the rod guide, and the tip side protrudes outside the first cylinder portion.
  • the bag body is accommodated in the second cylinder part. Further, the bag body is filled with gas.
  • the damper of the present invention may include a communication portion that communicates the first cylinder portion and the second cylinder portion so that the first cylinder portion and the second cylinder portion are arranged in parallel.
  • the communication path of the partition member includes a first communication path that provides resistance to the working fluid that flows between the first cylinder part and the second cylinder part, and from the second cylinder part to the first cylinder part. And a second communication passage provided with a check valve that allows only the flow of the working fluid.
  • the first piston allows the working fluid flowing between the first chamber and the second chamber to resist, and the reverse allows only the working fluid flow from the first chamber to the second chamber.
  • a fourth communication passage provided with a stop valve.
  • the fall prevention device of the present invention includes the damper.
  • the rod protrudes upward from the first cylinder, and the center axis of the first cylinder and the rod is inclined at a predetermined angle with respect to the horizontal plane between the upper surface of the article installed on the installation surface and the ceiling. It is attached.
  • the predetermined angle is 65 ° to 75 °, which can prevent the article from falling down.
  • articles may fall down due to earthquakes, such as furniture, a bed with multiple beds connected vertically, a large TV, a refrigerator, a bookcase, a showcase, a server rack, etc. Some of them are included.
  • FIG. 1 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 sectional drawing which shows the fall prevention apparatus of Embodiment 1.
  • FIG. 2 It is sectional drawing which shows the fall prevention apparatus of Embodiment 2.
  • FIG. It is sectional drawing which shows the fall prevention apparatus of Embodiment 3.
  • Embodiments 1 to 4 embodying a fall prevention device including a damper according to the present invention will be described with reference to the drawings.
  • the overturn prevention device of Embodiment 1 includes a damper 10 and a pair of base portions 1 ⁇ / b> A and 1 ⁇ / b> B. At least one or more fall prevention devices are attached between the upper surface of the furniture F and the ceiling T.
  • 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).
  • the furniture F may be tilted forward (rightward in FIG. 1) due to shaking such as an earthquake.
  • the damper 10 is provided with a first cylinder part 20, a second cylinder part 30, a partition member 40, a rod guide 50, a first piston 60, a rod 70, a second piston 80, and both ends.
  • Two joint portions 90A and 90B are provided.
  • the first cylinder part 20 and the second cylinder part 30 are formed by a cylindrical cylinder member 21 having one end opened and the other end closed.
  • the cylinder member 21 has a partition member 40 attached to an intermediate portion in the axial direction.
  • the cylinder member 21 forms the first cylinder part 20 on one end side where the cylinder member 21 is opened with the partition member 40 as a boundary, and forms the second cylinder part 30 on the other end part side which is closed. That is, the 1st cylinder part 20 is cylindrical.
  • the second cylinder portion 30 has a cylindrical shape in which one end portion is continuous with the first cylinder portion 20 and the other end portion is closed.
  • the first cylinder part 20 is filled with hydraulic oil Y.
  • the partition member 40 is provided at the boundary between the first cylinder part 20 and the second cylinder part 30 as described above.
  • the partition member 40 has a disk shape.
  • the partition member 40 has an outer diameter substantially equal to the inner diameter of the cylinder member 21 (the first cylinder portion 20 and the second cylinder portion 30).
  • the partition member 40 is formed with a recess 41 that is recessed in the central axis direction so as to go around the outer peripheral surface.
  • the cylinder member 21 is formed with a constricted portion 23 that is recessed inward so as to go around the peripheral wall portion of the portion where the partition member 40 is provided.
  • the partition member 40 is fixed by fitting the throttle portion 23 of the cylinder member 21 into a recess 41 formed on the outer peripheral surface.
  • the partition member 40 has a first communication passage 43 that communicates the first cylinder portion 20 and the second cylinder portion 30.
  • the first communication passage 43 imparts resistance to the hydraulic oil Y flowing between the first cylinder part 20 and the second cylinder part 30.
  • the partition member 40 has a second communication passage 45 that communicates the first cylinder portion 20 and the second cylinder portion 30.
  • the second communication passage 45 is provided with a check valve 47 that allows only the flow of the hydraulic oil Y from the second cylinder part 30 to the first cylinder part 20 accompanying the extension operation of the damper 10. For this reason, the damper 10 also generates a greater damping force during the contraction operation than during the extension operation, even by the partition member 40.
  • the rod guide 50 seals the opening 25 opened at one end of the first cylinder portion 20.
  • the rod guide 50 is annular.
  • the rod guide 50 has an outer diameter substantially equal to the inner diameter of the opening 25 of the first cylinder portion 20.
  • the inner diameter of the through hole 51 penetrating in the center is slightly larger than the outer diameter of the rod 70, and the rod 70 is slidably inserted.
  • the rod guide 50 is provided with a groove portion that goes around the inner peripheral surface of the through hole 51.
  • an annular oil seal 53 is fitted in a groove provided on the inner peripheral surface of the through hole 51.
  • the damper 10 is filled with the hydraulic oil Y in the first cylinder portion 20 and seals between the rod guide 50 and the rod 70 by the oil seal 53.
  • the friction with the rod 70 is suppressed, the slidability is good, and the response with a small amplitude is good.
  • the first piston 60 has a disk shape.
  • the outer diameter of the first piston 60 is slightly smaller than the inner diameter of the first cylinder part 20.
  • the first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y.
  • the first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2.
  • the first piston 60 has a third communication passage 61 that communicates the first chamber C1 and the second chamber C2.
  • the third communication passage 61 provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2.
  • the first piston 60 has a fourth communication passage 63 that communicates the first chamber C1 and the second chamber C2.
  • the fourth communication path 63 is provided with a check valve 65 that allows only the flow of the hydraulic oil Y from the first chamber C1 to the second chamber C2 due to the extension operation of the damper 10. For this reason, the damper 10 generates a greater damping force during the contraction operation than during the extension operation.
  • the damper 10 is a pressure damper in which the first piston 60 and the partition member 40 generate a greater damping force during the contraction operation than during the extension operation.
  • the rod 70 is cylindrical.
  • the rod 70 is connected to the first piston 60 at the base end. Further, as described above, the rod 70 is slidably inserted through the through hole 51 of the rod guide 50. The rod 70 protrudes to the outside of the first cylinder portion 20 at the tip side.
  • the second piston 80 has a disk shape.
  • the second piston 80 partitions the second cylinder part 30 into a third chamber C3 and a fourth chamber C4.
  • the third chamber C3 communicates with the second chamber C2 and is filled with hydraulic oil Y.
  • the fourth chamber C4 is filled with the gas G.
  • the second piston 80 is formed with a groove that goes around the outer peripheral surface.
  • the second piston 80 has an annular packing 81 that fits into the groove. For this reason, in the second cylinder part 30, the hydraulic oil Y filled in the third chamber C3 flows into the fourth chamber C4, or the gas G filled in the fourth chamber C4 enters the third chamber C3. Inflow is prevented.
  • Each joint part 90A, 90B is formed by bending a flat metal fitting.
  • Each joint portion 90 ⁇ / b> A, 90 ⁇ / b> B is connected to the other end portion of the cylinder member 21 closed and the tip portion of the rod 70.
  • Each joint portion 90 ⁇ / b> A, 90 ⁇ / b> B is formed with a through hole 91 that penetrates in a direction orthogonal to the axis of the damper 10.
  • the pair of base portions 1 ⁇ / b> A and 1 ⁇ / b> B is a first base portion 1 ⁇ / b> A connected to a joint portion 90 ⁇ / b> A connected to the other end portion of the cylinder member 21, and is connected to a joint portion 90 ⁇ / b> B connected to the distal end portion of the rod 70. 2 base portion 1B.
  • the first base portion 1A is placed in contact with the upper surface of the furniture F, and the second base portion 1B is in contact with the ceiling T.
  • the first base portion 1A and the second base portion 1B have the same form and structure.
  • Each base portion 1A, 1B has a base portion main body 3, a rotating shaft member 5, and a non-slip portion 7.
  • the base portion main body 3 has a rectangular outer shape (hereinafter, the base portion main body 3 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”.
  • the lower end edge of the base body 3 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).
  • the base portion main body 3 has depressions 9 formed on both sides of the central portion in the long side direction.
  • the recess 9 is open outward in the upward direction and the short side direction.
  • the hollow portion 9 has an insertion hole penetrating in the short side direction opened on a side surface.
  • the rotation shaft member 5 is inserted from one of the insertion holes of the base portion main body 3, and the central axis becomes the rotation shaft of the damper 10 in each of the base portions 1A and 1B.
  • the non-slip portion 7 has a similar (rectangular) outer shape that is slightly larger than the outer shape of the base body 3.
  • the anti-slip part 7 is an elastic body.
  • skid part 7 is fitted by the lower end opening of the base part main body 3 in the 1st base part 1A in the state mounted in contact with the upper surface of the furniture F.
  • skid part 7 is a substantially flat plate.
  • the anti-slip portion 7 has a flat upper surface or a surface that contacts the ceiling T of the furniture F.
  • the anti-slip portion 7 is detachably attached to the base portion main body 3 by its elastic force.
  • the rod 70 protrudes upward from the cylinder member 21 (first cylinder portion 20), and the cylinder member 21 (first cylinder portion 20 and second cylinder portion 30) and the center of the rod 70. It is mounted between the upper surface of the furniture F and the ceiling T so that the axis is inclined at an angle between 65 ° and 75 ° with respect to the horizontal plane.
  • the fall prevention device attached between the upper surface of the furniture F and the ceiling T has the hydraulic oil Y filled in the second chamber C2 when the furniture F is tilted and the damper 10 is contracted by a shake such as an earthquake.
  • the damper 10 contracts the volume occupied by the rod 70 in the first cylinder portion 20 increases due to the rod 70 entering the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is
  • the second chamber C2 flows through the first communication passage 43 of the partition member 40 and flows into the third chamber C3 formed in the second cylinder portion 30.
  • the damper 10 generates a damping force.
  • the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path 63 provided with the check valve. And flows into the second chamber C2. Further, when the damper 10 is extended, the volume occupied by the rod 70 in the first cylinder portion 20 is reduced due to the rod 70 retracting from the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is The third chamber C3 flows into the second chamber C2 through the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47.
  • the second cylinder part 30 acts as a volume compensation part, and the first cylinder part 20 is maintained in a state filled with the hydraulic oil Y.
  • the damper 10 of this overturn prevention device is filled in the fourth chamber C4 with no resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation.
  • the gas G can be expanded smoothly by the expansion force. For this reason, the damper 10 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
  • the damper 10 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 10 generates a damping force in the entire stroke range, and the damping force of the damper 10 always acts on the furniture F, and the furniture F Falling can be prevented.
  • the damper 10 constituting the overturn prevention device of the first embodiment includes the first cylinder part 20, the second cylinder part 30, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part.
  • Two pistons 80 are provided.
  • the first cylinder part 20 is cylindrical.
  • One end of the second cylinder part 30 is continuous with the first cylinder part 20.
  • the second cylinder portion 30 has a cylindrical shape with the other end closed.
  • the partition member 40 is provided at a boundary portion between the first cylinder portion 20 and the second cylinder portion 30.
  • the partition member 40 has a first communication passage 43 that communicates the first cylinder part 20 and the second cylinder part 30.
  • the rod guide 50 seals the opening 25 opened at the end of the first cylinder part 20.
  • the first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2.
  • the base end of the rod 70 is connected to the first piston 60. Further, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder portion 20.
  • the second piston 80 is slidably accommodated in the second cylinder part 30.
  • the second piston 80 communicates with the second chamber C2 and divides the inside of the second cylinder portion 30 into a third chamber C3 filled with hydraulic oil Y and a fourth chamber C4 filled with gas G. .
  • the second cylinder portion 30 acts as a volume compensation portion, maintains the state in which the hydraulic oil Y is filled in the first cylinder portion 20, and the first hydraulic fluid Y is filled. Since the piston moves in one cylinder part 20, a damping force can always be generated.
  • the damper 10 can generate a damping force over the entire stroke range.
  • the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y flowing between the first cylinder part 20 and the second cylinder part 30, and a second cylinder part. And a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from 30 to the first cylinder portion 20.
  • the first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2.
  • a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 10 can generate a damping force in the entire stroke during the contracting operation.
  • the fall prevention device of the second embodiment is implemented such that the second piston 80 is not stored in the second cylinder portion 30 of the damper 110 and the bag body 180 filled with the gas G is stored.
  • the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
  • the damper 110 of this overturn prevention device houses a bag body 180 filled with gas G on the closed end side of the second cylinder part 30.
  • the bag body 180 is fixed to the closed end of the second cylinder part 30.
  • the bag body 180 has elasticity. For this reason, in this damper 110, the bag body 180 occupies most of the internal space of the second cylinder part 30 in the most extended state. Further, in this fall prevention device, when the furniture F is tilted by a shake such as an earthquake and the damper 110 is contracted, the hydraulic oil Y filled in the second chamber C2 flows through the third communication passage 61 of the first piston 60. It flows into the first chamber C1.
  • the damper 110 when the damper 110 is contracted, the volume occupied by the rod 70 in the first cylinder portion 20 increases due to the rod 70 entering the first cylinder portion 20, so that the amount of hydraulic oil Y equal to the volume is
  • the second chamber C2 flows through the first communication passage 43 of the partition member 40 and flows between the bag body 180 and the partition member 40.
  • this overturn prevention device As the hydraulic oil Y between the bag body 180 and the partition member 40 increases, the bag body 180 filled with the gas G is compressed. For this reason, when the damper 110 contracts, this overturn prevention device increases the expansion force of the bag body 180, and the force that pushes back the hydraulic oil Y from the second cylinder part 30 to the second chamber C2 of the first cylinder part 20. To increase. As described above, in the fall prevention device, when the damper 110 contracts, the expansion force of the bag body 180 acts in the extending direction.
  • the hydraulic oil Y filled in the first chamber C1 is supplied to the third communication passage 61 of the first piston 60 and the fourth communication passage 63 provided with the check valve. And flows into the second chamber C2.
  • the damper 110 is extended, the volume occupied by the rod 70 in the first cylinder portion 20 is reduced due to the rod 70 retracting from the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is Then, the air flows into the second chamber C2 from between the bag body 180 and the partition member 40 through the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47.
  • the damper 110 of this overturn prevention device acts as a volume compensation portion, and the first cylinder portion 20 is maintained in a state filled with the hydraulic oil Y.
  • the damper 110 of the overturn prevention device has a bag body 180 filled with the gas G without any resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation. It can be smoothly extended by the expansion force. For this reason, the damper 110 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
  • the damper 110 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 110 generates a damping force in the entire stroke range, and the damping force of the damper 110 always acts on the furniture F, and the furniture F Falling can be prevented.
  • the damper 110 that constitutes the overturn prevention device of the second embodiment includes the first cylinder part 20, the second cylinder part 30, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part.
  • Two pistons 80 are provided.
  • the first cylinder part 20 is cylindrical.
  • One end of the second cylinder part 30 is continuous with the first cylinder part 20.
  • the second cylinder portion 30 has a cylindrical shape with the other end closed.
  • the partition member 40 is provided at a boundary portion between the first cylinder portion 20 and the second cylinder portion 30. Further, the partition member 40 has a first communication passage 43 that communicates the first cylinder part 20 and the second cylinder part 30.
  • the rod guide 50 seals the opening 25 opened at the end of the first cylinder part 20.
  • the first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2.
  • the base end of the rod 70 is connected to the first piston 60. Further, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder portion 20.
  • the bag body 180 is accommodated in the second cylinder part 30. Moreover, the bag body 180 is filled with the gas G inside.
  • the second cylinder part 30 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 20, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 20, a damping force can always be generated.
  • the damper 110 can generate a damping force over the entire stroke range.
  • the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y that flows between the first cylinder part 20 and the second cylinder part 30, and a second cylinder part. And a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from 30 to the first cylinder portion 20.
  • the first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2.
  • a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 110 can generate a damping force in the entire stroke during the contracting operation.
  • the damper 110 since the hydraulic oil Y flows through the second communication path 45 and the fourth communication path 63 when the damper 110 is extended, the damper 110 has no resistance in the extension direction and is expanded by the expansion force of the bag body 180 filled with the gas G. Can stretch smoothly. For this reason, if this damper 110 is attached between the upper surface of the furniture F installed on the floor and the ceiling T, it is possible to reliably follow the inclination of the furniture F due to shaking such as an earthquake.
  • the fall prevention device of the third embodiment is different from the first embodiment in that the first cylinder portion 220 and the second cylinder portion 230 of the damper 210 are arranged in parallel.
  • Other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
  • the damper 210 of this overturn prevention device is provided in the order of the first cylinder part 220, the partition member 40, the communication part R, and the second cylinder part 230.
  • the partition member 40 and the communication portion R are provided at the boundary between the first cylinder portion 220 and the second cylinder portion 230.
  • the communication part R communicates the first cylinder part 220 and the second cylinder part 230 via the first communication path 43 and the second communication path 45 of the partition member 40.
  • the first cylinder part 220 and the second cylinder part 230 are arranged in parallel.
  • the communication portion R has the lower end portion of the first cylinder portion 220 and the lower end portion of the second cylinder portion 230 in a state where the fall prevention device is attached between the upper surface of the furniture F and the ceiling T. And communicate with.
  • the communication part R forms a connection surface 225 orthogonal to the central axis of the first cylinder part 220 and the rod 70.
  • the fall prevention device connects one joint portion 90A to the connection surface 225 so that the center of the through hole 91 of the joint portion 90A is positioned on the central axis of the first cylinder portion 220 and the rod 70.
  • the fall prevention device connects the other joint portion 90 ⁇ / b> B to the tip of the rod 70.
  • the rod 70 protrudes upward from the first cylinder part 220, and the central axis of the first cylinder part 220 and the rod 70 is at an angle between 65 ° and 75 ° with respect to the horizontal plane. It attaches between the upper surface of the furniture F and the ceiling T so that it may incline.
  • the fall prevention device attached between the upper surface of the furniture F and the ceiling T has the hydraulic oil Y filled in the second chamber C2 when the furniture F is tilted and the damper 210 is contracted by a shake such as an earthquake.
  • the damper 210 is contracted, the volume occupied by the rod 70 in the first cylinder portion 220 is increased by the rod 70 entering the first cylinder portion 220.
  • the second chamber C2 flows through the first communication passage 43 and the communication portion R of the partition member 40 and flows into the third chamber C3 formed in the second cylinder portion 230.
  • the damper 210 generates a damping force.
  • the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path provided with the check valve 65. 63 and flows into the second chamber C2.
  • the damper 210 when the damper 210 is extended, the volume occupied by the rod 70 in the first cylinder part 220 is reduced by the rod 70 retracting from the first cylinder part 220, so that the amount of hydraulic oil Y equal to the volume of the rod 70 is increased. From the third chamber C3, it flows into the second chamber C2 through the communication portion R and the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47.
  • the damper 210 of this overturn prevention device acts as a volume compensation portion, and the first cylinder portion 220 is maintained in a state filled with the hydraulic oil Y. Further, the damper 210 of this overturn prevention device is filled in the fourth chamber C4 without resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation. The gas G can be smoothly extended by the expansion force. For this reason, the damper 210 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
  • the damper 210 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 210 generates a damping force over the entire stroke range, and the damping force of the damper 210 always acts on the furniture F, and the furniture F Falling can be prevented.
  • the damper 210 constituting the overturn prevention device of the third embodiment includes the first cylinder part 220, the second cylinder part 230, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part 220.
  • Two pistons 80 are provided.
  • the first cylinder part 220 is cylindrical.
  • One end of the second cylinder part 230 is continuous with the first cylinder part 220.
  • the second cylinder part 230 has a cylindrical shape with the other end closed.
  • the partition member 40 is provided at the boundary between the first cylinder part 220 and the second cylinder part 230.
  • the partition member 40 has a first communication path 43 that communicates the first cylinder part 220 and the second cylinder part 230.
  • the rod guide 50 seals the opening opened at the end of the first cylinder part 220.
  • the first piston 60 is slidably accommodated in the first cylinder part 220 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder part 220 into a first chamber C1 and a second chamber C2.
  • the base end of the rod 70 is connected to the first piston 60.
  • the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder part 220.
  • the second piston 80 is slidably accommodated in the second cylinder part 230.
  • the second piston 80 communicates with the second chamber C2 and divides the inside of the second cylinder portion 230 into a third chamber C3 filled with hydraulic oil Y and a fourth chamber C4 filled with gas G. .
  • the second cylinder part 230 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 220, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 220, a damping force can always be generated.
  • the damper 210 can generate a damping force over the entire stroke range.
  • the damper 210 includes a communication portion R that communicates the first cylinder portion 220 and the second cylinder portion 230 so that the first cylinder portion 220 and the second cylinder portion 230 are arranged in parallel. For this reason, this damper 210 can shorten a full length.
  • the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y that flows between the first cylinder part 220 and the second cylinder part 230, and a second cylinder part. 230 and a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from the first cylinder portion 220 to the first cylinder portion 220.
  • the first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2.
  • a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y.
  • the damper 210 can generate a damping force in the entire stroke during the contracting operation.
  • the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 when the damper 210 is extended, there is no resistance in the extension direction and the expansion of the gas G filled in the fourth chamber C4. It can stretch smoothly by force. For this reason, if this damper 10 is attached between the upper surface of the furniture F installed on the floor surface and the ceiling T, the inclination of the furniture F due to shaking such as an earthquake can be reliably followed.
  • the fall prevention device of the fourth embodiment is implemented such that the second piston 80 is not stored in the second cylinder portion 230 of the damper 310 and the bag body 380 filled with the gas G is stored. This is different from Form 3.
  • Other configurations are the same as those of the third embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
  • the damper 310 of this overturn prevention device houses a bag body 380 filled with gas G on the closed end side of the second cylinder portion 230. Since the bag body 380 is filled with the gas G, the bag body 380 is in close contact with the closed end portion of the second cylinder portion 230 by buoyancy in a state where the fall prevention device is attached between the upper surface of the furniture F and the ceiling T. . Thus, this overturn prevention device does not require the trouble of fixing the bag body 380 to the closed end portion of the second cylinder portion 230.
  • the bag body 380 has elasticity.
  • the bag body 380 occupies most of the internal space of the second cylinder 230 in the most extended state. Further, in this fall prevention device, when the furniture F is tilted by a shake such as an earthquake and the damper 310 is contracted, the hydraulic oil Y filled in the second chamber C2 flows through the third communication passage 61 of the first piston 60. It flows into the first chamber C1.
  • the damper 310 when the damper 310 is contracted, the volume occupied by the rod 70 in the first cylinder part 220 increases due to the rod 70 entering the first cylinder part 220, so that the amount of hydraulic oil Y equal to that volume is From the second chamber C2, it flows through the first communication passage 43 and the communication portion R of the partition member 40 and flows into the second cylinder portion 230 while compressing the bag body 380.
  • the bag body 380 filled with the gas G is compressed as the hydraulic oil Y in the second cylinder part 230 increases.
  • the damper 310 contracts, the expansion force of the bag body 380 increases, and the force that pushes back the hydraulic oil Y from the second cylinder part 230 to the second chamber C2 of the first cylinder part 220.
  • the expansion force of the bag body 380 acts in the extending direction.
  • the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path provided with the check valve 65. 63 and flows into the second chamber C2.
  • the damper 310 when the damper 310 is extended, the volume occupied by the rod 70 in the first cylinder part 220 is reduced by the rod 70 retracting from the first cylinder part 220, so that the amount of hydraulic oil Y equal to the volume of the oil is reduced.
  • the second cylinder portion 230 flows into the second chamber C2 through the communication portion R, the first communication passage 43 of the partition member 40, and the second communication passage 45 provided with the check valve 47.
  • the damper 310 of this overturn prevention device acts as a volume compensation part, and the first cylinder part 220 is maintained in a state filled with the hydraulic oil Y.
  • the damper 310 of this overturn prevention device has the hydraulic oil Y flowing through the second communication passage 45 and the fourth communication passage 63 during the extension operation, so there is no resistance in the extension direction and the bag body 180 filled with the gas G. It can be smoothly extended by the expansion force. For this reason, the damper 310 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
  • the damper 310 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 310 generates a damping force in the entire stroke range, and the damping force of the damper 310 always acts on the furniture F, and the furniture F Falling can be prevented.
  • the damper 310 constituting the overturn prevention device of the fourth embodiment includes the first cylinder part 220, the second cylinder part 230, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part 220.
  • Two pistons 80 are provided.
  • the first cylinder part 220 is cylindrical.
  • One end of the second cylinder part 230 is continuous with the first cylinder part 220.
  • the second cylinder part 230 has a cylindrical shape with the other end closed.
  • the partition member 40 is provided at the boundary between the first cylinder part 220 and the second cylinder part 230.
  • the partition member 40 has a first communication path 43 that communicates the first cylinder part 220 and the second cylinder part 230.
  • the rod guide 50 seals the opening opened at the end of the first cylinder part 220.
  • the first piston 60 is slidably accommodated in the first cylinder part 220 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder part 220 into a first chamber C1 and a second chamber C2.
  • the base end of the rod 70 is connected to the first piston 60.
  • the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder part 220.
  • the bag body 380 is accommodated in the second cylinder part 230. Further, the bag body 380 is filled with a gas G.
  • the second cylinder part 230 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 220, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 220, a damping force can always be generated.
  • the damper 310 can generate a damping force over the entire stroke range.
  • the damper 310 includes a communication portion R that connects the first cylinder portion 220 and the second cylinder portion 230 so that the first cylinder portion 220 and the second cylinder portion 230 are arranged in parallel. For this reason, this damper 310 can shorten a full length.
  • the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y flowing between the first cylinder part 220 and the second cylinder part 230, and a second cylinder part. 230 and a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from the first cylinder portion 220 to the first cylinder portion 220.
  • the first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2.
  • a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y.
  • the damper 310 can generate a damping force in the entire stroke during the contracting operation.
  • the damper 310 since the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 when the damper 310 is extended, the damper 310 has no resistance in the extension direction and is expanded by the expansion force of the bag body 380 filled with the gas G. Can stretch smoothly. For this reason, if this damper 310 is attached between the upper surface of the furniture F installed on the floor and the ceiling T, it is possible to reliably follow the inclination of the furniture F due to shaking such as an earthquake.
  • the present invention is not limited to Embodiments 1 to 4 described with reference to the above description and drawings.
  • the following embodiments are also included in the technical scope of the present invention.
  • the hydraulic oil is sealed in the cylinder.
  • the fourth chamber is filled with gas.
  • the fourth chamber may be compressed and filled.
  • the bag body is filled with gas, but the bag body may be compressed and filled with gas.
  • the pressure damper is used, but it may be a bilateral or elongation damper. In this case, a check valve or the like provided on the first piston and the partition member is changed.
  • the first cylinder part and the second cylinder part are arranged in parallel, but they may be arranged so that the central axes of the first cylinder part and the second cylinder part intersect each other. .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Fluid-Damping Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

Provided is a damper which provides damping force in the entire stroke range of the damper. A damper (10) is provided with a first cylinder section (20), a second cylinder section (30), a partition member (40), a rod guide (50), a first piston (60), a rod (70), and a second piston (80). The partition member (40) is provided at the boundary between the first cylinder section (20) and the second cylinder section (30). Also, the partition member (40) has a first communication passage (43) for providing communication between the first cylinder section (20) and the second cylinder section (30). The first piston (60) divides the inside of the first cylinder section (20) into a first chamber (C1) and a second chamber (C2). The second piston (80) divides the inside of the second cylinder section (30) into a third chamber (C3) in communication with the second chamber (C2) and filled with hydraulic oil (Y), and into a fourth chamber (C4) filled with gas (G).

Description

ダンパ及びこのダンパを備えた転倒防止装置Damper and fall prevention device provided with this damper
　本発明はダンパ（ｄａｍｐｅｒ）及びこのダンパを備えた転倒防止装置に関するものである。 The present invention relates to a damper and a fall prevention device including the damper.
　特許文献１は従来のダンパを備えた転倒防止装置を開示している。このダンパは、シリンダ（ｃｙｌｉｎｄｅｒ）、ロッドガイド（ｒｏｄ　ｇｕｉｄｅ）、ピストン（ｐｉｓｔｏｎ）、及びロッド（ｒｏｄ）を備えている。シリンダは有底筒状である。ロッドガイドはシリンダの開口部を封鎖している。ピストンはシリンダ内に摺動自在に収納されている。ロッドは、基端部がピストンに連結され、ロッドガイドを摺動自在に挿通し、先端側がシリンダの外部へ突出している。また、ダンパはシリンダ内に作動油及び圧縮ガスを封入している。このダンパは家具の上面と天井との間に取り付けられる転倒防止装置を構成している。この転倒防止装置は、ダンパのシリンダの底部が開口部よりも下方に位置し、ロッドがシリンダから上方に突出し、シリンダ及びロッドの中心軸が水平面に対して所定の角度に傾斜した状態で、家具の上面と天井との間に取り付けられる。この転倒防止装置は、地震等の揺れによって家具が傾いた際、ダンパのピストンが作動油内で移動することによって発生する減衰力が家具に作用して、家具の傾きを抑制し、家具の転倒を防止することができる。 Patent Document 1 discloses a fall prevention device equipped with a conventional damper. The damper includes a cylinder, a rod guide, a piston, and a rod. The cylinder has a bottomed cylindrical shape. The rod guide seals the opening of the cylinder. The piston is slidably accommodated in the cylinder. The rod has a proximal end connected to the piston, slidably inserted through the rod guide, and a distal end protruding outside the cylinder. The damper also encloses hydraulic oil and compressed gas in the cylinder. This damper comprises the fall prevention apparatus attached between the upper surface of furniture, and a ceiling. This overturn prevention device is configured such that the bottom of the cylinder of the damper is positioned below the opening, the rod projects upward from the cylinder, and the center axis of the cylinder and the rod is inclined at a predetermined angle with respect to the horizontal plane. It is attached between the upper surface and the ceiling. In this fall prevention device, when the furniture is tilted due to shaking such as an earthquake, the damping force generated by the movement of the piston of the damper in the hydraulic oil acts on the furniture to suppress the tilt of the furniture, and the furniture falls Can be prevented.
特開２０１５－６３３０号公報Japanese Patent Laying-Open No. 2015-6330
　しかし、このダンパのピストンは、作動油内のみでなく、作動油よりも上方に封入された圧縮ガス内も移動し得る。ダンパは圧縮ガス内でピストンが移動しても減衰力を発生することができない。つまり、このダンパは全ストローク範囲で減衰力を発生することができない。 However, the piston of this damper can move not only in the hydraulic oil but also in the compressed gas sealed above the hydraulic oil. The damper cannot generate a damping force even if the piston moves in the compressed gas. That is, this damper cannot generate a damping force over the entire stroke range.
　また、このダンパを備えた転倒防止装置は、家具の上面と天井との間隔が広いと、ピストンが作動油よりも上方に封入された圧縮ガス内に配置された状態で、家具の上面と天井との間に取り付けられるおそれがある。転倒防止装置は、ピストンが圧縮ガス内に配置された状態で取り付けられると、地震等の揺れによって家具が傾いた際、ダンパが収縮してピストンが作動油内に移動するまでダンパが減衰力を発生しない。このため、この転倒防止装置はダンパの減衰力が家具に有効に作用せずに家具が転倒するおそれがある。 In addition, when the space between the upper surface of the furniture and the ceiling is wide, the fall prevention device provided with this damper is arranged in a state where the piston is disposed in the compressed gas sealed above the hydraulic oil, and the upper surface and the ceiling of the furniture. There is a risk of being attached between. When the anti-tip device is installed with the piston placed in compressed gas, when the furniture is tilted due to shaking such as an earthquake, the damper will contract until the piston moves into the hydraulic fluid. Does not occur. For this reason, this fall prevention device may cause the furniture to fall without the damping force of the damper acting effectively on the furniture.
　本発明は、上記従来の実情に鑑みてなされたものであって、全ストローク範囲で減衰力を発生するダンパを提供するとともに、このダンパを備えることによって、物品の転倒を良好に防止することができる転倒防止装置を提供することを解決すべき課題としている。 The present invention has been made in view of the above-described conventional situation, and provides a damper that generates a damping force in the entire stroke range, and by providing the damper, it is possible to satisfactorily prevent an article from falling over. Providing a fall prevention device that can be used is a problem to be solved.
　第１発明のダンパは、第１シリンダ部、第２シリンダ部、仕切部材、ロッドガイド、第１ピストン、ロッド、及び第２ピストンを備えている。第１シリンダ部は筒状である。第２シリンダ部は第１シリンダ部に一方の端部が連通している。また、第２シリンダ部は他方の端部が閉鎖した筒状である。仕切部材は第１シリンダ部と第２シリンダ部との境界部に設けられている。また、仕切部材は第１シリンダ部と第２シリンダ部とを連通する連通路を有している。ロッドガイドは第１シリンダ部の端部に開口した開口部を封鎖している。第１ピストンは作動液体が充填された第１シリンダ部内に摺動自在に収納されている。また、第１ピストンは第１シリンダ部内を第１室と第２室とに区画している。ロッドは基端部が第１ピストンに連結されている。また、ロッドはロッドガイドを摺動自在に挿通して先端側が第１シリンダ部の外部へ突出している。第２ピストンは第２シリンダ部内に摺動自在に収納されている。また、第２ピストンは第２室に連通して作動液体が充填された第３室とガス（ｇａｓ）が充填された第４室とに第２シリンダ部内を区画している。 The damper of the first invention includes a first cylinder part, a second cylinder part, a partition member, a rod guide, a first piston, a rod, and a second piston. The first cylinder part is cylindrical. One end of the second cylinder portion communicates with the first cylinder portion. The second cylinder part has a cylindrical shape with the other end closed. The partition member is provided at a boundary portion between the first cylinder portion and the second cylinder portion. Further, the partition member has a communication path that communicates the first cylinder part and the second cylinder part. The rod guide seals the opening that opens at the end of the first cylinder. The first piston is slidably accommodated in the first cylinder portion filled with the working liquid. Further, the first piston partitions the inside of the first cylinder portion into a first chamber and a second chamber. The rod has a proximal end connected to the first piston. Further, the rod is slidably inserted through the rod guide, and the tip side protrudes outside the first cylinder portion. The second piston is slidably accommodated in the second cylinder part. The second piston communicates with the second chamber and divides the inside of the second cylinder portion into a third chamber filled with the working liquid and a fourth chamber filled with gas.
　第２発明のダンパは、第１シリンダ部、第２シリンダ部、仕切部材、ロッドガイド、第１ピストン、ロッド、及び袋体を備えている。第１シリンダ部は筒状である。第２シリンダ部は記第１シリンダ部に一方の端部が連通している。また、第２シリンダ部は他方の端部が閉鎖した筒状である。仕切部材は第１シリンダ部と第２シリンダ部との境界部に設けられている。また、仕切部材は第１シリンダ部と第２シリンダ部とを連通する連通路を有している。ロッドガイドは第１シリンダ部の端部に開口した開口部を封鎖している。第１ピストンは作動液体が充填された第１シリンダ部内に摺動自在に収納されている。また、第１ピストンは第１シリンダ部内を第１室と第２室とに区画している。ロッドは基端部が第１ピストンに連結されている。また、ロッドはロッドガイドを摺動自在に挿通して先端側が第１シリンダ部の外部へ突出している。袋体は第２シリンダ部内に収納されている。また、袋体は内部にガスを充填している。 The damper of the second invention includes a first cylinder part, a second cylinder part, a partition member, a rod guide, a first piston, a rod, and a bag. The first cylinder part is cylindrical. One end of the second cylinder portion communicates with the first cylinder portion. The second cylinder part has a cylindrical shape with the other end closed. The partition member is provided at a boundary portion between the first cylinder portion and the second cylinder portion. Further, the partition member has a communication path that communicates the first cylinder part and the second cylinder part. The rod guide seals the opening that opens at the end of the first cylinder. The first piston is slidably accommodated in the first cylinder portion filled with the working liquid. Further, the first piston partitions the inside of the first cylinder portion into a first chamber and a second chamber. The rod has a proximal end connected to the first piston. Further, the rod is slidably inserted through the rod guide, and the tip side protrudes outside the first cylinder portion. The bag body is accommodated in the second cylinder part. Further, the bag body is filled with gas.
　本発明のダンパは、第１シリンダ部と第２シリンダ部とが並列配置されるように、第１シリンダ部と第２シリンダ部とを連通する連通部を備え得る。 The damper of the present invention may include a communication portion that communicates the first cylinder portion and the second cylinder portion so that the first cylinder portion and the second cylinder portion are arranged in parallel.
　本発明のダンパにおいて、仕切部材の連通路は、第１シリンダ部と第２シリンダ部との間を流れる作動液体に抵抗を付与する第１連通路と、第２シリンダ部から第１シリンダ部への作動液体の流れのみを許容する逆止弁が設けられた第２連通路とを有し得る。また、第１ピストンは、第１室と第２室との間を流れる作動液体に抵抗を付与する第３連通路と、第１室から第２室への作動液体の流れのみを許容する逆止弁が設けられた第４連通路とを有し得る。 In the damper of the present invention, the communication path of the partition member includes a first communication path that provides resistance to the working fluid that flows between the first cylinder part and the second cylinder part, and from the second cylinder part to the first cylinder part. And a second communication passage provided with a check valve that allows only the flow of the working fluid. In addition, the first piston allows the working fluid flowing between the first chamber and the second chamber to resist, and the reverse allows only the working fluid flow from the first chamber to the second chamber. And a fourth communication passage provided with a stop valve.
　本発明の転倒防止装置は前記ダンパを備えている。このダンパはロッドが第１シリンダから上方に突出し、第１シリンダ及びロッドの中心軸が水平面に対して所定の角度に傾斜した状態で設置面上に設置された物品の上面と天井との間に取り付けられる。 The fall prevention device of the present invention includes the damper. In this damper, the rod protrudes upward from the first cylinder, and the center axis of the first cylinder and the rod is inclined at a predetermined angle with respect to the horizontal plane between the upper surface of the article installed on the installation surface and the ceiling. It is attached.
　ここで、所定の角度とは、物品の転倒を良好に防止することができる６５°～７５°である。また、物品は、家具、複数の寝台を上下方向に連結したベッド（ｂｅｄ）、大型テレビ、冷蔵庫、書棚、ショーケース（ｓｈｏｗｃａｓｅ）、サーバーラック（ｓｅｒｖｅｒ　ｒａｃｋ）等、地震の揺れ等によって転倒するおそれのあるものが含まれる。 Here, the predetermined angle is 65 ° to 75 °, which can prevent the article from falling down. In addition, articles may fall down due to earthquakes, such as furniture, a bed with multiple beds connected vertically, a large TV, a refrigerator, a bookcase, a showcase, a server rack, etc. Some of them are included.
実施形態１の転倒防止装置を家具の上面と天井との間に取り付けた状態を示す側面図である。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. 実施形態１の転倒防止装置を示す断面図である。It is sectional drawing which shows the fall prevention apparatus of Embodiment 1. FIG. 実施形態２の転倒防止装置を示す断面図である。It is sectional drawing which shows the fall prevention apparatus of Embodiment 2. FIG. 実施形態３の転倒防止装置を示す断面図である。It is sectional drawing which shows the fall prevention apparatus of Embodiment 3. 実施形態４の転倒防止装置を示す断面図である。It is sectional drawing which shows the fall prevention apparatus of Embodiment 4.
　本発明のダンパを備えた転倒防止装置を具体化した実施形態１～４について、図面を参照しつつ説明する。 Embodiments 1 to 4 embodying a fall prevention device including a damper according to the present invention will be described with reference to the drawings.
＜実施形態１＞
　実施形態１の転倒防止装置は、図１及び図２に示すように、ダンパ１０、一対のベース部１Ａ，１Ｂを備えている。この転倒防止装置は、家具Ｆの上面と天井Ｔとの間に少なくとも１個以上が取り付けられる。この家具Ｆは、床面（図示せず）から鉛直方向に伸びた壁面Ｗに背面を対向させて床面上に設置されている。また、この家具Ｆは、直方体形状であり、正面（図１における右側面）に図示しない扉や引き出し等を有し、内部に衣類や装身具等を収納することができる。家具Ｆは、水平断面形状が左右方向（図１において奥行き方向）に長い長方形状である。この家具Ｆは、転倒防止装置が取り付けられていない場合、地震等の揺れによって、前方向（図１において右方向）に傾いて転倒するおそれがある。 <Embodiment 1>
As shown in FIGS. 1 and 2, the overturn prevention device of Embodiment 1 includes a damper 10 and a pair of base portions 1 </ b> A and 1 </ b> B. At least one or more fall prevention devices are attached between the upper surface of the furniture F and the ceiling T. 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.
　ダンパ１０は、図２に示すように、第１シリンダ部２０、第２シリンダ部３０、仕切部材４０、ロッドガイド５０、第１ピストン６０、ロッド７０、第２ピストン８０、及び両端の設けられた２個のジョイント部９０Ａ，９０Ｂを備えている。第１シリンダ部２０及び第２シリンダ部３０は、一端部が開口し、他端部が閉鎖した円筒状のシリンダ部材２１によって形成されている。シリンダ部材２１は軸方向の中間部に仕切部材４０が取り付けられている。シリンダ部材２１は、仕切部材４０を境界にしてシリンダ部材２１の開口した一端部側に第１シリンダ部２０を形成し、閉鎖した他端部側に第２シリンダ部３０を形成している。つまり、第１シリンダ部２０は円筒状である。また、第２シリンダ部３０は、第１シリンダ部２０に一方の端部が連続し、他方の端部が閉鎖した円筒状である。第１シリンダ部２０は作動油Ｙが充填されている。 As shown in FIG. 2, the damper 10 is provided with a first cylinder part 20, a second cylinder part 30, a partition member 40, a rod guide 50, a first piston 60, a rod 70, a second piston 80, and both ends. Two joint portions 90A and 90B are provided. The first cylinder part 20 and the second cylinder part 30 are formed by a cylindrical cylinder member 21 having one end opened and the other end closed. The cylinder member 21 has a partition member 40 attached to an intermediate portion in the axial direction. The cylinder member 21 forms the first cylinder part 20 on one end side where the cylinder member 21 is opened with the partition member 40 as a boundary, and forms the second cylinder part 30 on the other end part side which is closed. That is, the 1st cylinder part 20 is cylindrical. The second cylinder portion 30 has a cylindrical shape in which one end portion is continuous with the first cylinder portion 20 and the other end portion is closed. The first cylinder part 20 is filled with hydraulic oil Y.
　仕切部材４０は、上述したように、第１シリンダ部２０と第２シリンダ部３０との境界部に設けられている。仕切部材４０は円盤状である。仕切部材４０は外径がシリンダ部材２１（第１シリンダ部２０及び第２シリンダ部３０）の内径と略等しい。仕切部材４０は外周面を一周するように中心軸方向に凹んだ凹部４１が形成されている。シリンダ部材２１は仕切部材４０が設けられた部分の周壁部を一周するように内側に凹ませた絞り部２３が形成されている。仕切部材４０は外周面に形成された凹部４１にシリンダ部材２１の絞り部２３を嵌め込んで固定されている。仕切部材４０は第１シリンダ部２０と第２シリンダ部３０とを連通する第１連通路４３を有している。第１連通路４３は第１シリンダ部２０と第２シリンダ部３０との間を流れる作動油Ｙに抵抗を付与する。また、仕切部材４０は第１シリンダ部２０と第２シリンダ部３０とを連通する第２連通路４５を有している。第２連通路４５はダンパ１０の伸長動作に伴う第２シリンダ部３０から第１シリンダ部２０への作動油Ｙの流れのみを許容する逆止弁４７が設けられている。このため、このダンパ１０は、仕切部材４０によっても、伸長動作時よりも収縮動作時に大きな減衰力が発生する。 The partition member 40 is provided at the boundary between the first cylinder part 20 and the second cylinder part 30 as described above. The partition member 40 has a disk shape. The partition member 40 has an outer diameter substantially equal to the inner diameter of the cylinder member 21 (the first cylinder portion 20 and the second cylinder portion 30). The partition member 40 is formed with a recess 41 that is recessed in the central axis direction so as to go around the outer peripheral surface. The cylinder member 21 is formed with a constricted portion 23 that is recessed inward so as to go around the peripheral wall portion of the portion where the partition member 40 is provided. The partition member 40 is fixed by fitting the throttle portion 23 of the cylinder member 21 into a recess 41 formed on the outer peripheral surface. The partition member 40 has a first communication passage 43 that communicates the first cylinder portion 20 and the second cylinder portion 30. The first communication passage 43 imparts resistance to the hydraulic oil Y flowing between the first cylinder part 20 and the second cylinder part 30. Further, the partition member 40 has a second communication passage 45 that communicates the first cylinder portion 20 and the second cylinder portion 30. The second communication passage 45 is provided with a check valve 47 that allows only the flow of the hydraulic oil Y from the second cylinder part 30 to the first cylinder part 20 accompanying the extension operation of the damper 10. For this reason, the damper 10 also generates a greater damping force during the contraction operation than during the extension operation, even by the partition member 40.
　ロッドガイド５０は第１シリンダ部２０の一端部に開口した開口部２５を封鎖している。ロッドガイド５０は円環状である。ロッドガイド５０は外径が第１シリンダ部２０の開口部２５の内径と略等しい。ロッドガイド５０は、中央に貫通した貫通孔５１の内径がロッド７０の外径よりも僅かに大きく、ロッド７０を摺動自在に挿通している。ロッドガイド５０は貫通孔５１の内周面を一周する溝部が設けられている。ロッドガイド５０は、貫通孔５１の内周面に設けられた溝部に環状のオイルシール（ｏｉｌ　ｓｅａｌ）５３がはめ込まれている。このように、このダンパ１０は、第１シリンダ部２０に作動油Ｙが充填されており、オイルシール５３によって、ロッドガイド５０とロッド７０との間をシール（ｓｅａｌ）するため、ロッドガイド５０とロッド７０との間の摩擦を抑えて摺動性が良く、微振幅の応答が良好である。 The rod guide 50 seals the opening 25 opened at one end of the first cylinder portion 20. The rod guide 50 is annular. The rod guide 50 has an outer diameter substantially equal to the inner diameter of the opening 25 of the first cylinder portion 20. In the rod guide 50, the inner diameter of the through hole 51 penetrating in the center is slightly larger than the outer diameter of the rod 70, and the rod 70 is slidably inserted. The rod guide 50 is provided with a groove portion that goes around the inner peripheral surface of the through hole 51. In the rod guide 50, an annular oil seal 53 is fitted in a groove provided on the inner peripheral surface of the through hole 51. Thus, the damper 10 is filled with the hydraulic oil Y in the first cylinder portion 20 and seals between the rod guide 50 and the rod 70 by the oil seal 53. The friction with the rod 70 is suppressed, the slidability is good, and the response with a small amplitude is good.
　第１ピストン６０は円盤状である。第１ピストン６０は外径が第１シリンダ部２０の内径よりも僅かに小さい。第１ピストン６０は作動油Ｙが充填された第１シリンダ部２０内に摺動自在に収納されている。第１ピストン６０は第１シリンダ部２０内を第１室Ｃ１と第２室Ｃ２とに区画している。第１ピストン６０は第１室Ｃ１と第２室Ｃ２とを連通する第３連通路６１を有している。第３連通路６１は第１室Ｃ１と第２室Ｃ２との間を流れる作動油Ｙに抵抗を付与する。また、第１ピストン６０は第１室Ｃ１と第２室Ｃ２とを連通する第４連通路６３を有している。第４連通路６３はダンパ１０の伸長動作に伴う第１室Ｃ１から第２室Ｃ２への作動油Ｙの流れのみを許容する逆止弁６５が設けられている。このため、このダンパ１０は伸長動作時よりも収縮動作時に大きな減衰力を発生する。このように、このダンパ１０は、第１ピストン６０及び仕切部材４０によって、伸長動作時よりも収縮動作時に大きな減衰力が発生する圧効きダンパである。 The first piston 60 has a disk shape. The outer diameter of the first piston 60 is slightly smaller than the inner diameter of the first cylinder part 20. The first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y. The first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2. The first piston 60 has a third communication passage 61 that communicates the first chamber C1 and the second chamber C2. The third communication passage 61 provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2. In addition, the first piston 60 has a fourth communication passage 63 that communicates the first chamber C1 and the second chamber C2. The fourth communication path 63 is provided with a check valve 65 that allows only the flow of the hydraulic oil Y from the first chamber C1 to the second chamber C2 due to the extension operation of the damper 10. For this reason, the damper 10 generates a greater damping force during the contraction operation than during the extension operation. As described above, the damper 10 is a pressure damper in which the first piston 60 and the partition member 40 generate a greater damping force during the contraction operation than during the extension operation.
　ロッド７０は円柱状である。このロッド７０は基端部が第１ピストン６０に連結されている。また、ロッド７０は、上述したように、ロッドガイド５０の貫通孔５１を摺動自在に挿通している。ロッド７０は先端側が第１シリンダ部２０の外部へ突出している。 The rod 70 is cylindrical. The rod 70 is connected to the first piston 60 at the base end. Further, as described above, the rod 70 is slidably inserted through the through hole 51 of the rod guide 50. The rod 70 protrudes to the outside of the first cylinder portion 20 at the tip side.
　第２ピストン８０は円盤状である。第２ピストン８０は第２シリンダ部３０内を第３室Ｃ３と第４室Ｃ４とに区画している。第３室Ｃ３は第２室Ｃ２に連通して作動油Ｙが充填されている。第４室Ｃ４はガスＧが充填されている。第２ピストン８０は外周面を一周する溝部が形成されている。第２ピストン８０は溝部に嵌まり込む環状パッキン８１を有している。このため、第２シリンダ部３０は、第３室Ｃ３内に充填された作動油Ｙが第４室Ｃ４に流入したり、第４室Ｃ４内に充填されたガスＧが第３室Ｃ３内に流入したりすることを防止している。 The second piston 80 has a disk shape. The second piston 80 partitions the second cylinder part 30 into a third chamber C3 and a fourth chamber C4. The third chamber C3 communicates with the second chamber C2 and is filled with hydraulic oil Y. The fourth chamber C4 is filled with the gas G. The second piston 80 is formed with a groove that goes around the outer peripheral surface. The second piston 80 has an annular packing 81 that fits into the groove. For this reason, in the second cylinder part 30, the hydraulic oil Y filled in the third chamber C3 flows into the fourth chamber C4, or the gas G filled in the fourth chamber C4 enters the third chamber C3. Inflow is prevented.
　各ジョイント部９０Ａ，９０Ｂは、平板状の金具を折り曲げて形成されている。また、各ジョイント部９０Ａ，９０Ｂはシリンダ部材２１の閉鎖した他端部とロッド７０の先端部に接続されている。各ジョイント部９０Ａ，９０Ｂはダンパ１０の軸線に直交する方向に貫通した貫通孔９１が形成されている。 Each joint part 90A, 90B is formed by bending a flat metal fitting. Each joint portion 90 </ b> A, 90 </ b> B is connected to the other end portion of the cylinder member 21 closed and the tip portion of the rod 70. Each joint portion 90 </ b> A, 90 </ b> B is formed with a through hole 91 that penetrates in a direction orthogonal to the axis of the damper 10.
　一対のベース部１Ａ，１Ｂは、シリンダ部材２１の他端部に接続されたジョイント部９０Ａに連結した第１ベース部１Ａであり、ロッド７０の先端部に接続されたジョイント部９０Ｂに連結した第２ベース部１Ｂである。第１ベース部１Ａは家具Ｆの上面に当接して載置され、第２ベース部１Ｂは天井Ｔに当接する。第１ベース部１Ａ及び第２ベース部１Ｂは同じ形態及び構造である。各ベース部１Ａ，１Ｂは、ベース部本体３、回動軸部材５、及び滑り止め部７を有している。 The pair of base portions 1 </ b> A and 1 </ b> B is a first base portion 1 </ b> A connected to a joint portion 90 </ b> A connected to the other end portion of the cylinder member 21, and is connected to a joint portion 90 </ b> B connected to the distal end portion of the rod 70. 2 base portion 1B. The first base portion 1A is placed in contact with the upper surface of the furniture F, and the second base portion 1B is in contact with the ceiling T. The first base portion 1A and the second base portion 1B have the same form and structure. Each base portion 1A, 1B has a base portion main body 3, a rotating shaft member 5, and a non-slip portion 7.
　家具Ｆの上面に当接して載置された状態で第１ベース部１Ａを上方から見た平面視において、ベース部本体３は長方形状の外形である（以下、この平面視におけるベース部本体３の外形において長辺が延びている方向を「長辺方向」と言い、短辺が延びている方向を「短辺方向」と言う。）。また、家具Ｆの上面に当接して載置された状態で第１ベース部１Ａを短辺方向に見た側面視において、ベース部本体３は、下端縁が家具Ｆの上面に平行に直線状に伸びており、上端縁が下端縁の両側から上方に膨らんだ円弧状の外形である（図１参照）。 In a plan view of the first base portion 1A 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 3 has a rectangular outer shape (hereinafter, the base portion main body 3 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 1 </ b> A viewed in the short side direction in a state in which the first base portion 1 </ b> A is placed in contact with the upper surface of the furniture F, the lower end edge of the base body 3 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).
　家具Ｆの上面に当接して載置された状態の第１ベース部１Ａにおいて、ベース部本体３は、長辺方向の中央部の両側に窪み部９が形成されている。この窪み部９は上方向と短辺方向の外方向に開口している。また、この窪み部９は短辺方向に貫通した挿通孔が側面に開口している。回動軸部材５は、ベース部本体３の挿通孔の一方から挿入され、中心軸が各ベース部１Ａ，１Ｂにおけるダンパ１０の回動軸になる。 In the first base portion 1A in a state of being placed in contact with the upper surface of the furniture F, the base portion main body 3 has depressions 9 formed on both sides of the central portion in the long side direction. The recess 9 is open outward in the upward direction and the short side direction. In addition, the hollow portion 9 has an insertion hole penetrating in the short side direction opened on a side surface. The rotation shaft member 5 is inserted from one of the insertion holes of the base portion main body 3, and the central axis becomes the rotation shaft of the damper 10 in each of the base portions 1A and 1B.
　滑り止め部７は、ベース部本体３の外形に僅かに大きい相似形（長方形状）の外形である。滑り止め部７は弾性体である。また、滑り止め部７は、家具Ｆの上面に当接して載置された状態の第１ベース部１Ａにおいて、ベース部本体３の下端開口に嵌合されている。また、滑り止め部７は略平板である。詳しくは、滑り止め部７は、家具Ｆの上面又は天井Ｔに当接する面が平坦である。滑り止め部７はその弾性力によってベース部本体３に着脱自在に取り付けられている。 The non-slip portion 7 has a similar (rectangular) outer shape that is slightly larger than the outer shape of the base body 3. The anti-slip part 7 is an elastic body. Moreover, the anti-slip | skid part 7 is fitted by the lower end opening of the base part main body 3 in the 1st base part 1A in the state mounted in contact with the upper surface of the furniture F. As shown in FIG. Moreover, the anti-slip | skid part 7 is a substantially flat plate. Specifically, the anti-slip portion 7 has a flat upper surface or a surface that contacts the ceiling T of the furniture F. The anti-slip portion 7 is detachably attached to the base portion main body 3 by its elastic force.
　このような構成を有する転倒防止装置は、ロッド７０がシリンダ部材２１（第１シリンダ部２０）から上方に突出し、シリンダ部材２１（第１シリンダ部２０及び第２シリンダ部３０）及びロッド７０の中心軸が水平面に対して６５°～７５°の間の角度に傾斜するように、家具Ｆの上面と天井Ｔとの間に取り付けられる。 In the fall prevention device having such a configuration, the rod 70 protrudes upward from the cylinder member 21 (first cylinder portion 20), and the cylinder member 21 (first cylinder portion 20 and second cylinder portion 30) and the center of the rod 70. It is mounted between the upper surface of the furniture F and the ceiling T so that the axis is inclined at an angle between 65 ° and 75 ° with respect to the horizontal plane.
　このように家具Ｆの上面と天井Ｔとの間に取り付けられた転倒防止装置は、地震等の揺れによって家具Ｆが傾き、ダンパ１０が収縮動作すると、第２室Ｃ２に充填された作動油Ｙが第１ピストン６０の第３連通路６１を流れて第１室Ｃ１に流入する。また、ダンパ１０が収縮動作すると、ロッド７０が第１シリンダ部２０内へ入り込むことにより第１シリンダ部２０内のロッド７０が占める体積が増加するため、その体積と等しい量の作動油Ｙが、第２室Ｃ２から仕切部材４０の第１連通路４３を流れて第２シリンダ部３０に形成された第３室Ｃ３にも流入する。これによって、このダンパ１０は減衰力が発生する。 As described above, the fall prevention device attached between the upper surface of the furniture F and the ceiling T has the hydraulic oil Y filled in the second chamber C2 when the furniture F is tilted and the damper 10 is contracted by a shake such as an earthquake. Flows through the third communication passage 61 of the first piston 60 and flows into the first chamber C1. Further, when the damper 10 contracts, the volume occupied by the rod 70 in the first cylinder portion 20 increases due to the rod 70 entering the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is The second chamber C2 flows through the first communication passage 43 of the partition member 40 and flows into the third chamber C3 formed in the second cylinder portion 30. As a result, the damper 10 generates a damping force.
　また、このダンパ１０は、第３室Ｃ３内の作動油Ｙが増加するに従い、第２ピストン８０が第４室Ｃ４側に押されて第４室Ｃ４に充填されたガスＧが圧縮される。このため、この転倒防止装置は、ダンパ１０が収縮動作すると、第４室Ｃ４内に充填されたガスＧの膨張力が増加し、作動油Ｙを第２シリンダ部３０の第３室Ｃ３から第１シリンダ部２０の第２室Ｃ２へ押し返す力が増加する。このように、この転倒防止装置は、ダンパ１０が収縮すると、伸長方向へガスＧの膨張力が作用する。 In the damper 10, as the hydraulic oil Y in the third chamber C3 increases, the second piston 80 is pushed toward the fourth chamber C4, and the gas G filled in the fourth chamber C4 is compressed. For this reason, when the damper 10 is contracted, the overturn prevention device increases the expansion force of the gas G filled in the fourth chamber C4, and the hydraulic oil Y is supplied from the third chamber C3 of the second cylinder portion 30 to the second chamber C3. The force which pushes back to the 2nd chamber C2 of 1 cylinder part 20 increases. Thus, in this overturn prevention device, when the damper 10 contracts, the expansion force of the gas G acts in the extending direction.
　また、この転倒防止装置は、ダンパ１０が伸長動作すると、第１室Ｃ１に充填された作動油Ｙが第１ピストン６０の第３連通路６１及び逆止弁が設けられた第４連通路６３を流れて、第２室Ｃ２に流入する。また、ダンパ１０が伸長動作すると、ロッド７０が第１シリンダ部２０内から退出することにより第１シリンダ部２０内のロッド７０が占める体積が減少するため、その体積と等しい量の作動油Ｙが、第３室Ｃ３から仕切部材４０の第１連通路４３及び逆止弁４７が設けられた第２連通路４５を通って第２室Ｃ２に流入する。このように、この転倒防止装置のダンパ１０は、第２シリンダ部３０が体積補償部として作用し、第１シリンダ部２０内は作動油Ｙが充填された状態が保持される。また、この転倒防止装置のダンパ１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなく第４室Ｃ４内に充填されたガスＧの膨張力によってスムーズ（ｓｍｏｏｔｈ）に伸長することができる。このため、この転倒防止装置のダンパ１０は、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 Further, in this overturn prevention device, when the damper 10 is extended, the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path 63 provided with the check valve. And flows into the second chamber C2. Further, when the damper 10 is extended, the volume occupied by the rod 70 in the first cylinder portion 20 is reduced due to the rod 70 retracting from the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is The third chamber C3 flows into the second chamber C2 through the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47. Thus, in the damper 10 of this overturn prevention device, the second cylinder part 30 acts as a volume compensation part, and the first cylinder part 20 is maintained in a state filled with the hydraulic oil Y. Further, the damper 10 of this overturn prevention device is filled in the fourth chamber C4 with no resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation. The gas G can be expanded smoothly by the expansion force. For this reason, the damper 10 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
　このように、この転倒防止装置は、作動油Ｙが充填された第１シリンダ部２０内を第１ピストン６０が移動するため、ダンパ１０が常に減衰力を発生することができる。よって、この転倒防止装置は、地震等の揺れによって家具Ｆが傾いた際、ダンパ１０が全ストローク範囲で減衰力を発生し、常にダンパ１０の減衰力が家具Ｆに作用して、家具Ｆの転倒を防止することができる。 Thus, in this overturn prevention device, since the first piston 60 moves in the first cylinder part 20 filled with the hydraulic oil Y, the damper 10 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 10 generates a damping force in the entire stroke range, and the damping force of the damper 10 always acts on the furniture F, and the furniture F Falling can be prevented.
　以上説明したように、実施形態１の転倒防止装置を構成するダンパ１０は、第１シリンダ部２０、第２シリンダ部３０、仕切部材４０、ロッドガイド５０、第１ピストン６０、ロッド７０、及び第２ピストン８０を備えている。第１シリンダ部２０は円筒状である。第２シリンダ部３０は第１シリンダ部２０に一方の端部が連続している。また、第２シリンダ部３０は他方の端部が閉鎖した円筒状である。仕切部材４０は第１シリンダ部２０と第２シリンダ部３０との境界部に設けられている。また、仕切部材４０は第１シリンダ部２０と第２シリンダ部３０とを連通する第１連通路４３を有している。ロッドガイド５０は第１シリンダ部２０の端部に開口した開口部２５を封鎖している。第１ピストン６０は作動油Ｙが充填された第１シリンダ部２０内に摺動自在に収納されている。また、第１ピストン６０は第１シリンダ部２０内を第１室Ｃ１と第２室Ｃ２とに区画している。ロッド７０は基端部が第１ピストン６０に連結されている。また、ロッド７０はロッドガイド５０を摺動自在に挿通して先端側が第１シリンダ部２０の外部へ突出している。第２ピストン８０は第２シリンダ部３０内に摺動自在に収納されている。また、第２ピストン８０は第２室Ｃ２に連通して作動油Ｙが充填された第３室Ｃ３とガスＧが充填された第４室Ｃ４とに第２シリンダ部３０内を区画している。 As described above, the damper 10 constituting the overturn prevention device of the first embodiment includes the first cylinder part 20, the second cylinder part 30, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part. Two pistons 80 are provided. The first cylinder part 20 is cylindrical. One end of the second cylinder part 30 is continuous with the first cylinder part 20. The second cylinder portion 30 has a cylindrical shape with the other end closed. The partition member 40 is provided at a boundary portion between the first cylinder portion 20 and the second cylinder portion 30. Further, the partition member 40 has a first communication passage 43 that communicates the first cylinder part 20 and the second cylinder part 30. The rod guide 50 seals the opening 25 opened at the end of the first cylinder part 20. The first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2. The base end of the rod 70 is connected to the first piston 60. Further, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder portion 20. The second piston 80 is slidably accommodated in the second cylinder part 30. The second piston 80 communicates with the second chamber C2 and divides the inside of the second cylinder portion 30 into a third chamber C3 filled with hydraulic oil Y and a fourth chamber C4 filled with gas G. .
　このダンパ１０は、上述したように、第２シリンダ部３０が体積補償部として作用し、第１シリンダ部２０内を作動油Ｙが充填された状態を保持し、作動油Ｙが充填された第１シリンダ部２０内をピストンが移動するため、常に減衰力を発生することができる。 In the damper 10, as described above, the second cylinder portion 30 acts as a volume compensation portion, maintains the state in which the hydraulic oil Y is filled in the first cylinder portion 20, and the first hydraulic fluid Y is filled. Since the piston moves in one cylinder part 20, a damping force can always be generated.
　したがって、このダンパ１０は全ストローク範囲で減衰力を発生することができる。 Therefore, the damper 10 can generate a damping force over the entire stroke range.
　また、このダンパ１０において、仕切部材４０の連通路は、第１シリンダ部２０と第２シリンダ部３０との間を流れる作動油Ｙに抵抗を付与する第１連通路４３と、第２シリンダ部３０から第１シリンダ部２０への作動油Ｙの流れのみを許容する逆止弁４７が設けられた第２連通路４５とを有している。また、第１ピストン６０は、第１室Ｃ１と第２室Ｃ２との間を流れる作動油Ｙに抵抗を付与する第３連通路６１と、第１室Ｃ１から第２室Ｃ２への作動油Ｙの流れのみを許容する逆止弁６５が設けられた第４連通路６３とを有している。このため、このダンパ１０は、収縮動作する際の全ストロークにおいて、減衰力を発生することができる。一方、このダンパ１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなく第４室Ｃ４内に充填されたガスＧの膨張力によってスムーズに伸長することができる。このため、このダンパ１０を床面上に設置された家具Ｆの上面と天井Ｔとの間に取り付けると、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 In the damper 10, the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y flowing between the first cylinder part 20 and the second cylinder part 30, and a second cylinder part. And a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from 30 to the first cylinder portion 20. The first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2. And a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 10 can generate a damping force in the entire stroke during the contracting operation. On the other hand, since the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 when the damper 10 is extended, the expansion of the gas G filled in the fourth chamber C4 has no resistance in the extension direction. It can stretch smoothly by force. For this reason, if this damper 10 is attached between the upper surface of the furniture F installed on the floor surface and the ceiling T, the inclination of the furniture F due to shaking such as an earthquake can be reliably followed.
＜実施形態２＞
　実施形態２の転倒防止装置は、図３に示すように、ダンパ１１０の第２シリンダ部３０に第２ピストン８０が収納されず、ガスＧを充填した袋体１８０が収納されている点が実施形態１と相違する。他の構成は実施形態１と同様であり、同一の構成は同一の符号を付し詳細な説明を省略する。 <Embodiment 2>
As shown in FIG. 3, the fall prevention device of the second embodiment is implemented such that the second piston 80 is not stored in the second cylinder portion 30 of the damper 110 and the bag body 180 filled with the gas G is stored. Different from Form 1. Other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
　この転倒防止装置のダンパ１１０は第２シリンダ部３０の閉鎖した端部側にガスＧを充填した袋体１８０が収納されている。袋体１８０は第２シリンダ部３０の閉鎖した端部に固定されている。袋体１８０は伸縮性を有している。このため、このダンパ１１０は、最も伸長した状態で第２シリンダ部３０の内部空間のほとんどを袋体１８０が占める。また、この転倒防止装置は、地震等の揺れによって家具Ｆが傾き、ダンパ１１０が収縮動作すると、第２室Ｃ２に充填された作動油Ｙが第１ピストン６０の第３連通路６１を流れて第１室Ｃ１に流入する。また、ダンパ１１０が収縮動作すると、ロッド７０が第１シリンダ部２０内へ入り込むことにより第１シリンダ部２０内のロッド７０が占める体積の増加するため、その体積と等しい量の作動油Ｙが、第２室Ｃ２から仕切部材４０の第１連通路４３を流れて袋体１８０と仕切部材４０との間に流入する。 The damper 110 of this overturn prevention device houses a bag body 180 filled with gas G on the closed end side of the second cylinder part 30. The bag body 180 is fixed to the closed end of the second cylinder part 30. The bag body 180 has elasticity. For this reason, in this damper 110, the bag body 180 occupies most of the internal space of the second cylinder part 30 in the most extended state. Further, in this fall prevention device, when the furniture F is tilted by a shake such as an earthquake and the damper 110 is contracted, the hydraulic oil Y filled in the second chamber C2 flows through the third communication passage 61 of the first piston 60. It flows into the first chamber C1. Further, when the damper 110 is contracted, the volume occupied by the rod 70 in the first cylinder portion 20 increases due to the rod 70 entering the first cylinder portion 20, so that the amount of hydraulic oil Y equal to the volume is The second chamber C2 flows through the first communication passage 43 of the partition member 40 and flows between the bag body 180 and the partition member 40.
　また、この転倒防止装置は、袋体１８０と仕切部材４０との間の作動油Ｙが増加するに従い、ガスＧが充填された袋体１８０が圧縮される。このため、この転倒防止装置は、ダンパ１１０が収縮動作すると、袋体１８０の膨張力が増加し、作動油Ｙを第２シリンダ部３０から第１シリンダ部２０の第２室Ｃ２へ押し返す力が増加する。このように、この転倒防止装置は、ダンパ１１０が収縮すると、伸長方向へ袋体１８０の膨張力が作用する。 Also, in this overturn prevention device, as the hydraulic oil Y between the bag body 180 and the partition member 40 increases, the bag body 180 filled with the gas G is compressed. For this reason, when the damper 110 contracts, this overturn prevention device increases the expansion force of the bag body 180, and the force that pushes back the hydraulic oil Y from the second cylinder part 30 to the second chamber C2 of the first cylinder part 20. To increase. As described above, in the fall prevention device, when the damper 110 contracts, the expansion force of the bag body 180 acts in the extending direction.
　また、この転倒防止装置は、ダンパ１１０が伸長動作すると、第１室Ｃ１に充填された作動油Ｙが第１ピストン６０の第３連通路６１及び逆止弁が設けられた第４連通路６３を流れて、第２室Ｃ２に流入する。また、ダンパ１１０が伸長動作すると、ロッド７０が第１シリンダ部２０内から退出することにより第１シリンダ部２０内のロッド７０が占める体積の減少するため、その体積と等しい量の作動油Ｙが、袋体１８０と仕切部材４０との間から仕切部材４０の第１連通路４３及び逆止弁４７が設けられた第２連通路４５を通って、第２室Ｃ２に流入する。このように、この転倒防止装置のダンパ１１０は、第２シリンダ部３０が体積補償部として作用し、第１シリンダ部２０内は作動油Ｙが充填された状態が保持される。また、この転倒防止装置のダンパ１１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなくガスＧが充填された袋体１８０の膨張力によってスムーズに伸長することができる。このため、この転倒防止装置のダンパ１１０は、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 Further, in this overturn prevention device, when the damper 110 is extended, the hydraulic oil Y filled in the first chamber C1 is supplied to the third communication passage 61 of the first piston 60 and the fourth communication passage 63 provided with the check valve. And flows into the second chamber C2. Further, when the damper 110 is extended, the volume occupied by the rod 70 in the first cylinder portion 20 is reduced due to the rod 70 retracting from the first cylinder portion 20, so that the amount of hydraulic oil Y equal to that volume is Then, the air flows into the second chamber C2 from between the bag body 180 and the partition member 40 through the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47. Thus, in the damper 110 of this overturn prevention device, the second cylinder portion 30 acts as a volume compensation portion, and the first cylinder portion 20 is maintained in a state filled with the hydraulic oil Y. Further, the damper 110 of the overturn prevention device has a bag body 180 filled with the gas G without any resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation. It can be smoothly extended by the expansion force. For this reason, the damper 110 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
　このように、この転倒防止装置は、作動油Ｙが充填された第１シリンダ部２０内を第１ピストン６０が移動するため、ダンパ１１０が常に減衰力を発生することができる。よって、この転倒防止装置は、地震等の揺れによって家具Ｆが傾いた際、ダンパ１１０が全ストローク範囲で減衰力を発生し、常にダンパ１１０の減衰力が家具Ｆに作用して、家具Ｆの転倒を防止することができる。 Thus, in this overturn prevention device, since the first piston 60 moves in the first cylinder portion 20 filled with the hydraulic oil Y, the damper 110 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 110 generates a damping force in the entire stroke range, and the damping force of the damper 110 always acts on the furniture F, and the furniture F Falling can be prevented.
　以上説明したように、実施形態２の転倒防止装置を構成するダンパ１１０は、第１シリンダ部２０、第２シリンダ部３０、仕切部材４０、ロッドガイド５０、第１ピストン６０、ロッド７０、及び第２ピストン８０を備えている。第１シリンダ部２０は円筒状である。第２シリンダ部３０は第１シリンダ部２０に一方の端部が連続している。また、第２シリンダ部３０は他方の端部が閉鎖した円筒状である。仕切部材４０は第１シリンダ部２０と第２シリンダ部３０との境界部に設けられている。また、仕切部材４０は第１シリンダ部２０と第２シリンダ部３０とを連通する第１連通路４３を有している。ロッドガイド５０は第１シリンダ部２０の端部に開口した開口部２５を封鎖している。第１ピストン６０は作動油Ｙが充填された第１シリンダ部２０内に摺動自在に収納されている。また、第１ピストン６０は第１シリンダ部２０内を第１室Ｃ１と第２室Ｃ２とに区画している。ロッド７０は基端部が第１ピストン６０に連結されている。また、ロッド７０はロッドガイド５０を摺動自在に挿通して先端側が第１シリンダ部２０の外部へ突出している。袋体１８０は第２シリンダ部３０内に収納されている。また、袋体１８０は内部にガスＧを充填している。 As described above, the damper 110 that constitutes the overturn prevention device of the second embodiment includes the first cylinder part 20, the second cylinder part 30, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part. Two pistons 80 are provided. The first cylinder part 20 is cylindrical. One end of the second cylinder part 30 is continuous with the first cylinder part 20. The second cylinder portion 30 has a cylindrical shape with the other end closed. The partition member 40 is provided at a boundary portion between the first cylinder portion 20 and the second cylinder portion 30. Further, the partition member 40 has a first communication passage 43 that communicates the first cylinder part 20 and the second cylinder part 30. The rod guide 50 seals the opening 25 opened at the end of the first cylinder part 20. The first piston 60 is slidably accommodated in the first cylinder part 20 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder portion 20 into a first chamber C1 and a second chamber C2. The base end of the rod 70 is connected to the first piston 60. Further, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder portion 20. The bag body 180 is accommodated in the second cylinder part 30. Moreover, the bag body 180 is filled with the gas G inside.
　このダンパ１１０は、上述したように、第２シリンダ部３０が体積補償部として作用し、第１シリンダ部２０内を作動油Ｙが充填された状態を保持し、作動油Ｙが充填された第１シリンダ部２０内をピストンが移動するため、常に減衰力を発生することができる。 As described above, in the damper 110, the second cylinder part 30 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 20, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 20, a damping force can always be generated.
　したがって、このダンパ１１０は全ストローク範囲で減衰力を発生することができる。 Therefore, the damper 110 can generate a damping force over the entire stroke range.
　また、このダンパ１１０において、仕切部材４０の連通路は、第１シリンダ部２０と第２シリンダ部３０との間を流れる作動油Ｙに抵抗を付与する第１連通路４３と、第２シリンダ部３０から第１シリンダ部２０への作動油Ｙの流れのみを許容する逆止弁４７が設けられた第２連通路４５とを有している。また、第１ピストン６０は、第１室Ｃ１と第２室Ｃ２との間を流れる作動油Ｙに抵抗を付与する第３連通路６１と、第１室Ｃ１から第２室Ｃ２への作動油Ｙの流れのみを許容する逆止弁６５が設けられた第４連通路６３とを有している。このため、このダンパ１１０は、収縮動作する際の全ストロークにおいて、減衰力を発生することができる。一方、このダンパ１１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなくガスＧが充填された袋体１８０の膨張力によってスムーズに伸長することができる。このため、このダンパ１１０を床面上に設置された家具Ｆの上面と天井Ｔとの間に取り付けると、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 In the damper 110, the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y that flows between the first cylinder part 20 and the second cylinder part 30, and a second cylinder part. And a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from 30 to the first cylinder portion 20. The first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2. And a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 110 can generate a damping force in the entire stroke during the contracting operation. On the other hand, since the hydraulic oil Y flows through the second communication path 45 and the fourth communication path 63 when the damper 110 is extended, the damper 110 has no resistance in the extension direction and is expanded by the expansion force of the bag body 180 filled with the gas G. Can stretch smoothly. For this reason, if this damper 110 is attached between the upper surface of the furniture F installed on the floor and the ceiling T, it is possible to reliably follow the inclination of the furniture F due to shaking such as an earthquake.
＜実施形態３＞
　実施形態３の転倒防止装置は、図４に示すように、ダンパ２１０の第１シリンダ部２２０と第２シリンダ部２３０とが並列配置されている点が実施形態１と相違する。他の構成は実施形態１と同様であり、同一の構成は同一の符号を付し詳細な説明を省略する。 <Embodiment 3>
As shown in FIG. 4, the fall prevention device of the third embodiment is different from the first embodiment in that the first cylinder portion 220 and the second cylinder portion 230 of the damper 210 are arranged in parallel. Other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
　この転倒防止装置のダンパ２１０は、第１シリンダ部２２０、仕切部材４０、連通部Ｒ、第２シリンダ部２３０の順に設けられている。このように、仕切部材４０と連通部Ｒは第１シリンダ部２２０と第２シリンダ部２３０との境界部に設けられている。連通部Ｒは仕切部材４０の第１連通路４３及び第２連通路４５を介して第１シリンダ部２２０と第２シリンダ部２３０とを連通している。第１シリンダ部２２０と第２シリンダ部２３０とは並列配置されている。つまり、連通部Ｒは、転倒防止装置を家具Ｆの上面と天井Ｔとの間に取り付けた状態で、第１シリンダ部２２０の下側の端部と第２シリンダ部２３０の下側の端部とを連通している。 The damper 210 of this overturn prevention device is provided in the order of the first cylinder part 220, the partition member 40, the communication part R, and the second cylinder part 230. As described above, the partition member 40 and the communication portion R are provided at the boundary between the first cylinder portion 220 and the second cylinder portion 230. The communication part R communicates the first cylinder part 220 and the second cylinder part 230 via the first communication path 43 and the second communication path 45 of the partition member 40. The first cylinder part 220 and the second cylinder part 230 are arranged in parallel. In other words, the communication portion R has the lower end portion of the first cylinder portion 220 and the lower end portion of the second cylinder portion 230 in a state where the fall prevention device is attached between the upper surface of the furniture F and the ceiling T. And communicate with.
　連通部Ｒは第１シリンダ部２２０及びロッド７０の中心軸に直交する接続面２２５を形成している。転倒防止装置は、第１シリンダ部２２０及びロッド７０の中心軸線上にジョイント部９０Ａの貫通孔９１の中心が位置するように、一方のジョイント部９０Ａを接続面２２５に接続している。転倒防止装置は他方のジョイント部９０Ｂをロッド７０の先端部に接続している。 The communication part R forms a connection surface 225 orthogonal to the central axis of the first cylinder part 220 and the rod 70. The fall prevention device connects one joint portion 90A to the connection surface 225 so that the center of the through hole 91 of the joint portion 90A is positioned on the central axis of the first cylinder portion 220 and the rod 70. The fall prevention device connects the other joint portion 90 </ b> B to the tip of the rod 70.
　このような構成を有する転倒防止装置は、ロッド７０が第１シリンダ部２２０から上方に突出し、第１シリンダ部２２０及びロッド７０の中心軸が水平面に対して６５°～７５°の間の角度に傾斜するように、家具Ｆの上面と天井Ｔとの間に取り付けられる。 In the fall prevention device having such a configuration, the rod 70 protrudes upward from the first cylinder part 220, and the central axis of the first cylinder part 220 and the rod 70 is at an angle between 65 ° and 75 ° with respect to the horizontal plane. It attaches between the upper surface of the furniture F and the ceiling T so that it may incline.
　このように家具Ｆの上面と天井Ｔとの間に取り付けられた転倒防止装置は、地震等の揺れによって家具Ｆが傾き、ダンパ２１０が収縮動作すると、第２室Ｃ２に充填された作動油Ｙが第１ピストン６０の第３連通路６１を流れて第１室Ｃ１に流入する。また、ダンパ２１０が収縮動作すると、ロッド７０が第１シリンダ部２２０内へ入り込むことにより第１シリンダ部２２０内のロッド７０が占める体積の増加するため、その体積と等しい量の作動油Ｙが、第２室Ｃ２から仕切部材４０の第１連通路４３及び連通部Ｒを流れて第２シリンダ部２３０に形成された第３室Ｃ３に流入する。これによって、このダンパ２１０は減衰力が発生する。 In this way, the fall prevention device attached between the upper surface of the furniture F and the ceiling T has the hydraulic oil Y filled in the second chamber C2 when the furniture F is tilted and the damper 210 is contracted by a shake such as an earthquake. Flows through the third communication passage 61 of the first piston 60 and flows into the first chamber C1. Further, when the damper 210 is contracted, the volume occupied by the rod 70 in the first cylinder portion 220 is increased by the rod 70 entering the first cylinder portion 220. The second chamber C2 flows through the first communication passage 43 and the communication portion R of the partition member 40 and flows into the third chamber C3 formed in the second cylinder portion 230. As a result, the damper 210 generates a damping force.
　また、このダンパ２１０は、第３室Ｃ３内の作動油Ｙが増加するに従い、第２ピストン８０が第４室Ｃ４側に押されて第４室Ｃ４に充填されたガスＧが圧縮される。このため、この転倒防止装置は、ダンパ２１０が収縮動作すると、第４室Ｃ４内に充填されたガスＧの膨張力が増加し、作動油Ｙを第２シリンダ部２３０の第３室Ｃ３から第１シリンダ部２２０の第２室Ｃ２へ押し返す力が増加する。このように、この転倒防止装置は、ダンパ２１０が収縮すると、伸長方向へガスＧの膨張力が作用する。 In the damper 210, as the hydraulic oil Y in the third chamber C3 increases, the second piston 80 is pushed toward the fourth chamber C4, and the gas G filled in the fourth chamber C4 is compressed. For this reason, when the damper 210 is contracted, the overturn prevention device increases the expansion force of the gas G filled in the fourth chamber C4, and the hydraulic oil Y is supplied from the third chamber C3 of the second cylinder portion 230 to the second chamber C3. The force which pushes back to the 2nd chamber C2 of 1 cylinder part 220 increases. Thus, in this overturn prevention device, when the damper 210 contracts, the expansion force of the gas G acts in the extending direction.
　また、この転倒防止装置は、ダンパ２１０が伸長動作すると、第１室Ｃ１に充填された作動油Ｙが第１ピストン６０の第３連通路６１及び逆止弁６５が設けられた第４連通路６３を流れて、第２室Ｃ２に流入する。また、ダンパ２１０が伸長動作すると、ロッド７０が第１シリンダ部２２０内から退出することにより第１シリンダ部２２０内のロッド７０が占める体積が減少するため、その体積と等しい量の作動油Ｙが、第３室Ｃ３から連通部Ｒと、仕切部材４０の第１連通路４３及び逆止弁４７が設けられた第２連通路４５とを通って第２室Ｃ２に流入する。このように、この転倒防止装置のダンパ２１０は、第２シリンダ部２３０が体積補償部として作用し、第１シリンダ部２２０内は作動油Ｙが充填された状態が保持される。また、この転倒防止装置のダンパ２１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなく第４室Ｃ４内に充填されたガスＧの膨張力によってスムーズに伸長することができる。このため、この転倒防止装置のダンパ２１０は、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 Further, in this overturn prevention device, when the damper 210 extends, the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path provided with the check valve 65. 63 and flows into the second chamber C2. Further, when the damper 210 is extended, the volume occupied by the rod 70 in the first cylinder part 220 is reduced by the rod 70 retracting from the first cylinder part 220, so that the amount of hydraulic oil Y equal to the volume of the rod 70 is increased. From the third chamber C3, it flows into the second chamber C2 through the communication portion R and the first communication passage 43 of the partition member 40 and the second communication passage 45 provided with the check valve 47. Thus, in the damper 210 of this overturn prevention device, the second cylinder portion 230 acts as a volume compensation portion, and the first cylinder portion 220 is maintained in a state filled with the hydraulic oil Y. Further, the damper 210 of this overturn prevention device is filled in the fourth chamber C4 without resistance in the extending direction because the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 during the extension operation. The gas G can be smoothly extended by the expansion force. For this reason, the damper 210 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
　このように、この転倒防止装置は、作動油Ｙが充填された第１シリンダ部２２０内を第１ピストン６０が移動するため、ダンパ２１０が常に減衰力を発生することができる。よって、この転倒防止装置は、地震等の揺れによって家具Ｆが傾いた際、ダンパ２１０が全ストローク範囲で減衰力を発生し、常にダンパ２１０の減衰力が家具Ｆに作用して、家具Ｆの転倒を防止することができる。 Thus, in this overturn prevention device, since the first piston 60 moves in the first cylinder portion 220 filled with the hydraulic oil Y, the damper 210 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 210 generates a damping force over the entire stroke range, and the damping force of the damper 210 always acts on the furniture F, and the furniture F Falling can be prevented.
　以上説明したように、実施形態３の転倒防止装置を構成するダンパ２１０は、第１シリンダ部２２０、第２シリンダ部２３０、仕切部材４０、ロッドガイド５０、第１ピストン６０、ロッド７０、及び第２ピストン８０を備えている。第１シリンダ部２２０は円筒状である。第２シリンダ部２３０は第１シリンダ部２２０に一方の端部が連続している。また、第２シリンダ部２３０は他方の端部が閉鎖した円筒状である。仕切部材４０は第１シリンダ部２２０と第２シリンダ部２３０との境界部に設けられている。また、仕切部材４０は第１シリンダ部２２０と第２シリンダ部２３０とを連通する第１連通路４３を有している。ロッドガイド５０は第１シリンダ部２２０の端部に開口した開口部を封鎖している。第１ピストン６０は作動油Ｙが充填された第１シリンダ部２２０内に摺動自在に収納されている。また、第１ピストン６０は第１シリンダ部２２０内を第１室Ｃ１と第２室Ｃ２とに区画している。ロッド７０は基端部が第１ピストン６０に連結されている。また、ロッド７０はロッドガイド５０を摺動自在に挿通して先端側が第１シリンダ部２２０の外部へ突出している。第２ピストン８０は第２シリンダ部２３０内に摺動自在に収納されている。また、第２ピストン８０は第２室Ｃ２に連通して作動油Ｙが充填された第３室Ｃ３とガスＧが充填された第４室Ｃ４とに第２シリンダ部２３０内を区画している。 As described above, the damper 210 constituting the overturn prevention device of the third embodiment includes the first cylinder part 220, the second cylinder part 230, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part 220. Two pistons 80 are provided. The first cylinder part 220 is cylindrical. One end of the second cylinder part 230 is continuous with the first cylinder part 220. The second cylinder part 230 has a cylindrical shape with the other end closed. The partition member 40 is provided at the boundary between the first cylinder part 220 and the second cylinder part 230. In addition, the partition member 40 has a first communication path 43 that communicates the first cylinder part 220 and the second cylinder part 230. The rod guide 50 seals the opening opened at the end of the first cylinder part 220. The first piston 60 is slidably accommodated in the first cylinder part 220 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder part 220 into a first chamber C1 and a second chamber C2. The base end of the rod 70 is connected to the first piston 60. In addition, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder part 220. The second piston 80 is slidably accommodated in the second cylinder part 230. The second piston 80 communicates with the second chamber C2 and divides the inside of the second cylinder portion 230 into a third chamber C3 filled with hydraulic oil Y and a fourth chamber C4 filled with gas G. .
　このダンパ２１０は、上述したように、第２シリンダ部２３０が体積補償部として作用し、第１シリンダ部２２０内を作動油Ｙが充填された状態を保持し、作動油Ｙが充填された第１シリンダ部２２０内をピストンが移動するため、常に減衰力を発生することができる。 As described above, in the damper 210, the second cylinder part 230 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 220, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 220, a damping force can always be generated.
　したがって、このダンパ２１０は全ストローク範囲で減衰力を発生することができる。 Therefore, the damper 210 can generate a damping force over the entire stroke range.
　また、このダンパ２１０は、第１シリンダ部２２０と第２シリンダ部２３０とが並列配置されるように、第１シリンダ部２２０と第２シリンダ部２３０とを連通する連通部Ｒを備えている。このため、このダンパ２１０は全長を短くすることができる。 Further, the damper 210 includes a communication portion R that communicates the first cylinder portion 220 and the second cylinder portion 230 so that the first cylinder portion 220 and the second cylinder portion 230 are arranged in parallel. For this reason, this damper 210 can shorten a full length.
　また、このダンパ２１０において、仕切部材４０の連通路は、第１シリンダ部２２０と第２シリンダ部２３０との間を流れる作動油Ｙに抵抗を付与する第１連通路４３と、第２シリンダ部２３０から第１シリンダ部２２０への作動油Ｙの流れのみを許容する逆止弁４７が設けられた第２連通路４５とを有している。また、第１ピストン６０は、第１室Ｃ１と第２室Ｃ２との間を流れる作動油Ｙに抵抗を付与する第３連通路６１と、第１室Ｃ１から第２室Ｃ２への作動油Ｙの流れのみを許容する逆止弁６５が設けられた第４連通路６３とを有している。このため、このダンパ２１０は、収縮動作する際の全ストロークにおいて、減衰力を発生することができる。一方、このダンパ２１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなく第４室Ｃ４内に充填されたガスＧの膨張力によってスムーズに伸長することができる。このため、このダンパ１０を床面上に設置された家具Ｆの上面と天井Ｔとの間に取り付けると、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 In the damper 210, the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y that flows between the first cylinder part 220 and the second cylinder part 230, and a second cylinder part. 230 and a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from the first cylinder portion 220 to the first cylinder portion 220. The first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2. And a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 210 can generate a damping force in the entire stroke during the contracting operation. On the other hand, since the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 when the damper 210 is extended, there is no resistance in the extension direction and the expansion of the gas G filled in the fourth chamber C4. It can stretch smoothly by force. For this reason, if this damper 10 is attached between the upper surface of the furniture F installed on the floor surface and the ceiling T, the inclination of the furniture F due to shaking such as an earthquake can be reliably followed.
＜実施形態４＞
　実施形態４の転倒防止装置は、図５に示すように、ダンパ３１０の第２シリンダ部２３０に第２ピストン８０が収納されず、ガスＧを充填した袋体３８０が収納されている点が実施形態３と相違する。他の構成は実施形態３と同様であり、同一の構成は同一の符号を付し詳細な説明を省略する。 <Embodiment 4>
As shown in FIG. 5, the fall prevention device of the fourth embodiment is implemented such that the second piston 80 is not stored in the second cylinder portion 230 of the damper 310 and the bag body 380 filled with the gas G is stored. This is different from Form 3. Other configurations are the same as those of the third embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
　この転倒防止装置のダンパ３１０は第２シリンダ部２３０の閉鎖した端部側にガスＧを充填した袋体３８０が収納されている。袋体３８０は、ガスＧが充填されているため、転倒防止装置が家具Ｆの上面と天井Ｔとの間に取り付けられた状態で、浮力によって第２シリンダ部２３０の閉鎖した端部に密着する。このように、この転倒防止装置は、袋体３８０を第２シリンダ部２３０の閉鎖した端部に固定する手間を要しない。袋体３８０は伸縮性を有している。 The damper 310 of this overturn prevention device houses a bag body 380 filled with gas G on the closed end side of the second cylinder portion 230. Since the bag body 380 is filled with the gas G, the bag body 380 is in close contact with the closed end portion of the second cylinder portion 230 by buoyancy in a state where the fall prevention device is attached between the upper surface of the furniture F and the ceiling T. . Thus, this overturn prevention device does not require the trouble of fixing the bag body 380 to the closed end portion of the second cylinder portion 230. The bag body 380 has elasticity.
　このダンパ３１０は、最も伸長した状態で第２シリンダ部２３０の内部空間のほとんどを袋体３８０が占める。また、この転倒防止装置は、地震等の揺れによって家具Ｆが傾き、ダンパ３１０が収縮動作すると、第２室Ｃ２に充填された作動油Ｙが第１ピストン６０の第３連通路６１を流れて第１室Ｃ１に流入する。また、ダンパ３１０が収縮動作すると、ロッド７０が第１シリンダ部２２０内へ入り込むことにより第１シリンダ部２２０内のロッド７０が占める体積が増加するため、その体積と等しい量の作動油Ｙが、第２室Ｃ２から仕切部材４０の第１連通路４３及び連通部Ｒを流れて袋体３８０を圧縮しながら第２シリンダ部２３０内に流入する。 In the damper 310, the bag body 380 occupies most of the internal space of the second cylinder 230 in the most extended state. Further, in this fall prevention device, when the furniture F is tilted by a shake such as an earthquake and the damper 310 is contracted, the hydraulic oil Y filled in the second chamber C2 flows through the third communication passage 61 of the first piston 60. It flows into the first chamber C1. Further, when the damper 310 is contracted, the volume occupied by the rod 70 in the first cylinder part 220 increases due to the rod 70 entering the first cylinder part 220, so that the amount of hydraulic oil Y equal to that volume is From the second chamber C2, it flows through the first communication passage 43 and the communication portion R of the partition member 40 and flows into the second cylinder portion 230 while compressing the bag body 380.
　このように、この転倒防止装置は、第２シリンダ部２３０内の作動油Ｙが増加するに従い、ガスＧが充填された袋体３８０が圧縮される。このため、この転倒防止装置は、ダンパ３１０が収縮動作すると、袋体３８０の膨張力が増加し、作動油Ｙを第２シリンダ部２３０から第１シリンダ部２２０の第２室Ｃ２へ押し返す力が増加する。このように、この転倒防止装置は、ダンパ３１０が収縮すると、伸長方向へ袋体３８０の膨張力が作用する。 Thus, in this overturn prevention device, the bag body 380 filled with the gas G is compressed as the hydraulic oil Y in the second cylinder part 230 increases. For this reason, in this overturn prevention device, when the damper 310 contracts, the expansion force of the bag body 380 increases, and the force that pushes back the hydraulic oil Y from the second cylinder part 230 to the second chamber C2 of the first cylinder part 220. To increase. As described above, in the fall prevention device, when the damper 310 contracts, the expansion force of the bag body 380 acts in the extending direction.
　また、この転倒防止装置は、ダンパ３１０が伸長動作すると、第１室Ｃ１に充填された作動油Ｙが第１ピストン６０の第３連通路６１及び逆止弁６５が設けられた第４連通路６３を流れて、第２室Ｃ２に流入する。また、ダンパ３１０が伸長動作すると、ロッド７０が第１シリンダ部２２０内から退出することにより第１シリンダ部２２０内のロッド７０が占める体積の減少するため、その体積と等しい量の作動油Ｙが、第２シリンダ部２３０から連通部Ｒと仕切部材４０の第１連通路４３及び逆止弁４７が設けられた第２連通路４５とを通って、第２室Ｃ２に流入する。このように、この転倒防止装置のダンパ３１０は、第２シリンダ部２３０が体積補償部として作用し、第１シリンダ部２２０内は作動油Ｙが充填された状態が保持される。また、この転倒防止装置のダンパ３１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなくガスＧが充填された袋体１８０の膨張力によってスムーズに伸長することができる。このため、この転倒防止装置のダンパ３１０は、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 Further, in this overturn prevention device, when the damper 310 is extended, the hydraulic oil Y filled in the first chamber C1 is provided with the third communication path 61 of the first piston 60 and the fourth communication path provided with the check valve 65. 63 and flows into the second chamber C2. Further, when the damper 310 is extended, the volume occupied by the rod 70 in the first cylinder part 220 is reduced by the rod 70 retracting from the first cylinder part 220, so that the amount of hydraulic oil Y equal to the volume of the oil is reduced. The second cylinder portion 230 flows into the second chamber C2 through the communication portion R, the first communication passage 43 of the partition member 40, and the second communication passage 45 provided with the check valve 47. Thus, in the damper 310 of this overturn prevention device, the second cylinder part 230 acts as a volume compensation part, and the first cylinder part 220 is maintained in a state filled with the hydraulic oil Y. In addition, the damper 310 of this overturn prevention device has the hydraulic oil Y flowing through the second communication passage 45 and the fourth communication passage 63 during the extension operation, so there is no resistance in the extension direction and the bag body 180 filled with the gas G. It can be smoothly extended by the expansion force. For this reason, the damper 310 of this fall prevention device can reliably follow the inclination of the furniture F caused by shaking such as an earthquake.
　このように、この転倒防止装置は、作動油Ｙが充填された第１シリンダ部２２０内を第１ピストン６０が移動するため、ダンパ３１０が常に減衰力を発生することができる。よって、この転倒防止装置は、地震等の揺れによって家具Ｆが傾いた際、ダンパ３１０が全ストローク範囲で減衰力を発生し、常にダンパ３１０の減衰力が家具Ｆに作用して、家具Ｆの転倒を防止することができる。 Thus, in this overturn prevention device, since the first piston 60 moves in the first cylinder part 220 filled with the hydraulic oil Y, the damper 310 can always generate a damping force. Therefore, in this fall prevention device, when the furniture F tilts due to shaking such as an earthquake, the damper 310 generates a damping force in the entire stroke range, and the damping force of the damper 310 always acts on the furniture F, and the furniture F Falling can be prevented.
　以上説明したように、実施形態４の転倒防止装置を構成するダンパ３１０は、第１シリンダ部２２０、第２シリンダ部２３０、仕切部材４０、ロッドガイド５０、第１ピストン６０、ロッド７０、及び第２ピストン８０を備えている。第１シリンダ部２２０は円筒状である。第２シリンダ部２３０は第１シリンダ部２２０に一方の端部が連続している。また、第２シリンダ部２３０は他方の端部が閉鎖した円筒状である。仕切部材４０は第１シリンダ部２２０と第２シリンダ部２３０との境界部に設けられている。また、仕切部材４０は第１シリンダ部２２０と第２シリンダ部２３０とを連通する第１連通路４３を有している。ロッドガイド５０は第１シリンダ部２２０の端部に開口した開口部を封鎖している。第１ピストン６０は作動油Ｙが充填された第１シリンダ部２２０内に摺動自在に収納されている。また、第１ピストン６０は第１シリンダ部２２０内を第１室Ｃ１と第２室Ｃ２とに区画している。ロッド７０は基端部が第１ピストン６０に連結されている。また、ロッド７０はロッドガイド５０を摺動自在に挿通して先端側が第１シリンダ部２２０の外部へ突出している。袋体３８０は第２シリンダ部２３０内に収納されている。また、袋体３８０は内部にガスＧを充填している。 As described above, the damper 310 constituting the overturn prevention device of the fourth embodiment includes the first cylinder part 220, the second cylinder part 230, the partition member 40, the rod guide 50, the first piston 60, the rod 70, and the first cylinder part 220. Two pistons 80 are provided. The first cylinder part 220 is cylindrical. One end of the second cylinder part 230 is continuous with the first cylinder part 220. The second cylinder part 230 has a cylindrical shape with the other end closed. The partition member 40 is provided at the boundary between the first cylinder part 220 and the second cylinder part 230. In addition, the partition member 40 has a first communication path 43 that communicates the first cylinder part 220 and the second cylinder part 230. The rod guide 50 seals the opening opened at the end of the first cylinder part 220. The first piston 60 is slidably accommodated in the first cylinder part 220 filled with hydraulic oil Y. Further, the first piston 60 partitions the first cylinder part 220 into a first chamber C1 and a second chamber C2. The base end of the rod 70 is connected to the first piston 60. In addition, the rod 70 is slidably inserted through the rod guide 50, and the tip side protrudes outside the first cylinder part 220. The bag body 380 is accommodated in the second cylinder part 230. Further, the bag body 380 is filled with a gas G.
　このダンパ３１０は、上述したように、第２シリンダ部２３０が体積補償部として作用し、第１シリンダ部２２０内を作動油Ｙが充填された状態を保持し、作動油Ｙが充填された第１シリンダ部２２０内をピストンが移動するため、常に減衰力を発生することができる。 As described above, in the damper 310, the second cylinder part 230 acts as a volume compensation part, maintains the state in which the hydraulic oil Y is filled in the first cylinder part 220, and is filled with the hydraulic oil Y. Since the piston moves in one cylinder part 220, a damping force can always be generated.
　したがって、このダンパ３１０は全ストローク範囲で減衰力を発生することができる。 Therefore, the damper 310 can generate a damping force over the entire stroke range.
　また、このダンパ３１０は、第１シリンダ部２２０と第２シリンダ部２３０とが並列配置されるように、第１シリンダ部２２０と第２シリンダ部２３０とを連通する連通部Ｒを備えている。このため、このダンパ３１０は全長を短くすることができる。 Further, the damper 310 includes a communication portion R that connects the first cylinder portion 220 and the second cylinder portion 230 so that the first cylinder portion 220 and the second cylinder portion 230 are arranged in parallel. For this reason, this damper 310 can shorten a full length.
　また、このダンパ３１０において、仕切部材４０の連通路は、第１シリンダ部２２０と第２シリンダ部２３０との間を流れる作動油Ｙに抵抗を付与する第１連通路４３と、第２シリンダ部２３０から第１シリンダ部２２０への作動油Ｙの流れのみを許容する逆止弁４７が設けられた第２連通路４５とを有している。また、第１ピストン６０は、第１室Ｃ１と第２室Ｃ２との間を流れる作動油Ｙに抵抗を付与する第３連通路６１と、第１室Ｃ１から第２室Ｃ２への作動油Ｙの流れのみを許容する逆止弁６５が設けられた第４連通路６３とを有している。このため、このダンパ３１０は、収縮動作する際の全ストロークにおいて、減衰力を発生することができる。一方、このダンパ３１０は、伸長動作する際に作動油Ｙが第２連通路４５及び第４連通路６３を流れるため、伸長方向に抵抗がなくガスＧが充填された袋体３８０の膨張力によってスムーズに伸長することができる。このため、このダンパ３１０を床面上に設置された家具Ｆの上面と天井Ｔとの間に取り付けると、地震等の揺れによる家具Ｆの傾きに確実に追随することができる。 In the damper 310, the communication path of the partition member 40 includes a first communication path 43 that provides resistance to the hydraulic oil Y flowing between the first cylinder part 220 and the second cylinder part 230, and a second cylinder part. 230 and a second communication passage 45 provided with a check valve 47 that allows only the flow of hydraulic oil Y from the first cylinder portion 220 to the first cylinder portion 220. The first piston 60 includes a third communication passage 61 that provides resistance to the hydraulic oil Y flowing between the first chamber C1 and the second chamber C2, and hydraulic oil from the first chamber C1 to the second chamber C2. And a fourth communication path 63 provided with a check valve 65 that allows only the flow of Y. For this reason, the damper 310 can generate a damping force in the entire stroke during the contracting operation. On the other hand, since the hydraulic oil Y flows through the second communication passage 45 and the fourth communication passage 63 when the damper 310 is extended, the damper 310 has no resistance in the extension direction and is expanded by the expansion force of the bag body 380 filled with the gas G. Can stretch smoothly. For this reason, if this damper 310 is attached between the upper surface of the furniture F installed on the floor and the ceiling T, it is possible to reliably follow the inclination of the furniture F due to shaking such as an earthquake.
　本発明は上記記述及び図面によって説明した実施形態１～４に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
（１）実施形態１～４では、シリンダ内に作動油を封入したが、作動油に限らず液体であればよい。
（２）実施形態１及び３では、第４室にガスを充填したが、第４室にガスを圧縮して充填してもよい。
（３）実施形態２及び４では、袋体にガスを充填したが、袋体にガスを圧縮して充填してもよい。
（４）実施形態１～４では、圧効きダンパであったが、両利き、又は伸び効きダンパであってもよい。この場合、第１ピストンと仕切部材に設けられた逆止弁等を変更する。
（５）実施形態３及び４では、第１シリンダ部と第２シリンダ部とを並列配置したが、第１シリンダ部と第２シリンダ部の夫々の中心軸が交差するように配置してもよい。 The present invention is not limited to Embodiments 1 to 4 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 the first to fourth embodiments, the hydraulic oil is sealed in the cylinder.
(2) In Embodiments 1 and 3, the fourth chamber is filled with gas. However, the fourth chamber may be compressed and filled.
(3) In Embodiments 2 and 4, the bag body is filled with gas, but the bag body may be compressed and filled with gas.
(4) In the first to fourth embodiments, the pressure damper is used, but it may be a bilateral or elongation damper. In this case, a check valve or the like provided on the first piston and the partition member is changed.
(5) In Embodiments 3 and 4, the first cylinder part and the second cylinder part are arranged in parallel, but they may be arranged so that the central axes of the first cylinder part and the second cylinder part intersect each other. .
　１０，１１０，２１０，３１０…ダンパ、２０，２２０…第１シリンダ部、３０，２３０…第２シリンダ部、４０…仕切部材、４３，４５…連通路（４３…第１連通路、４５…第２連通路）、５０…ロッドガイド、６０…第１ピストン、７０…ロッド、８０…第２ピストン、１８０、３８０…袋体、Ｃ１…第１室、Ｃ２…第２室、Ｃ３…第３室、Ｃ４…第４室、Ｆ…家具（物品）、Ｇ…ガス、Ｒ…連通部、Ｔ…天井、Ｙ…作動油（作動液体） 10, 110, 210, 310 ... damper, 20, 220 ... first cylinder part, 30, 230 ... second cylinder part, 40 ... partition member, 43, 45 ... communication path (43 ... first communication path, 45 ... first 2 communication paths), 50 ... rod guide, 60 ... first piston, 70 ... rod, 80 ... second piston, 180, 380 ... bag body, C1 ... first chamber, C2 ... second chamber, C3 ... third chamber , C4 ... fourth chamber, F ... furniture (article), G ... gas, R ... communication part, T ... ceiling, Y ... hydraulic oil (working liquid)

Claims (8)

  1. 　筒状の第１シリンダ部と、
    　前記第１シリンダ部に一方の端部が連通し、他方の端部が閉鎖した筒状の第２シリンダ部と、
    　前記第１シリンダ部と前記第２シリンダ部との境界部に設けられ、前記第１シリンダ部と前記第２シリンダ部とを連通する連通路を有した仕切部材と、
    　前記第１シリンダ部の端部に開口した開口部を封鎖したロッドガイドと、
    　作動液体が充填された前記第１シリンダ部内に摺動自在に収納され、前記第１シリンダ部内を第１室と第２室とに区画した第１ピストンと、
    　基端部が前記第１ピストンに連結されており、前記ロッドガイドを摺動自在に挿通して先端側が前記第１シリンダ部の外部へ突出したロッドと、
    　前記第２シリンダ部内に摺動自在に収納され、前記第２室に連通して作動液体が充填された第３室とガスが充填された第４室とに前記第２シリンダ部内を区画した第２ピストンと、
    　を備えていることを特徴とするダンパ。     A cylindrical first cylinder part;
    A cylindrical second cylinder part with one end communicating with the first cylinder part and the other end closed;
    A partition member provided at a boundary portion between the first cylinder portion and the second cylinder portion, and having a communication passage communicating the first cylinder portion and the second cylinder portion;
    A rod guide that blocks an opening that is open at an end of the first cylinder portion;
    A first piston which is slidably accommodated in the first cylinder portion filled with a working liquid, and divides the first cylinder portion into a first chamber and a second chamber;
    A base end portion connected to the first piston, a rod that is slidably inserted through the rod guide, and a distal end side protrudes to the outside of the first cylinder portion;
    The second cylinder part is slidably accommodated in the second cylinder part, and the second cylinder part is partitioned into a third chamber that is in communication with the second chamber and is filled with working liquid and a fourth chamber that is filled with gas. Two pistons,
    The damper characterized by having.
  2. 　筒状の第１シリンダ部と、
    　前記第１シリンダ部に一方の端部が連通し、他方の端部が閉鎖した筒状の第２シリンダ部と、
    　前記第１シリンダ部と前記第２シリンダ部との境界部に設けられ、前記第１シリンダ部と前記第２シリンダ部とを連通する連通路を有した仕切部材と、
    　前記第１シリンダ部の端部に開口した開口部を封鎖したロッドガイドと、
    　作動液体が充填された前記第１シリンダ部内に摺動自在に収納され、前記第１シリンダ部内を第１室と第２室とに区画した第１ピストンと、
    　基端部が前記第１ピストンに連結されており、前記ロッドガイドを摺動自在に挿通して先端側が前記第１シリンダ部の外部へ突出したロッドと、
    　前記第２シリンダ部内に収納され、内部にガスを充填した袋体と、
    　を備えていることを特徴とするダンパ。     A cylindrical first cylinder part;
    A cylindrical second cylinder part with one end communicating with the first cylinder part and the other end closed;
    A partition member provided at a boundary portion between the first cylinder portion and the second cylinder portion, and having a communication passage communicating the first cylinder portion and the second cylinder portion;
    A rod guide that blocks an opening that is open at an end of the first cylinder portion;
    A first piston which is slidably accommodated in the first cylinder portion filled with a working liquid, and divides the first cylinder portion into a first chamber and a second chamber;
    A base end portion connected to the first piston, a rod that is slidably inserted through the rod guide, and a distal end side protrudes to the outside of the first cylinder portion;
    A bag body housed in the second cylinder portion and filled with gas;
    The damper characterized by having.
  3. 　前記第１シリンダ部と前記第２シリンダ部とが並列配置されるように、前記第１シリンダ部と前記第２シリンダ部とを連通する連通部を備えていることを特徴とする請求項１記載のダンパ。 2. A communication portion that connects the first cylinder portion and the second cylinder portion so as to arrange the first cylinder portion and the second cylinder portion in parallel. Damper.
  4. 　前記連通路は、前記第１シリンダ部と前記第２シリンダ部との間を流れる作動液体に抵抗を付与する第１連通路と、前記第２シリンダ部から前記第１シリンダ部への作動液体の流れのみを許容する逆止弁が設けられた第２連通路とを有し、
    　前記第１ピストンは、前記第１室と前記第２室との間を流れる作動液体に抵抗を付与する第３連通路と、前記第１室から前記第２室への作動液体の流れのみを許容する逆止弁が設けられた第４連通路とを有していることを特徴とする請求項１記載のダンパ。     The communication path includes a first communication path that provides resistance to the working liquid that flows between the first cylinder part and the second cylinder part, and a working fluid that flows from the second cylinder part to the first cylinder part. A second communication path provided with a check valve that allows only flow;
    The first piston has only a third communication path for imparting resistance to the working liquid flowing between the first chamber and the second chamber, and a flow of the working liquid from the first chamber to the second chamber. The damper according to claim 1, further comprising a fourth communication passage provided with a check valve to allow.
  5. 　前記ロッドが前記第１シリンダから上方に突出し、前記第１シリンダ及び前記ロッドの中心軸が水平面に対して所定の角度に傾斜した状態で設置面上に設置された物品の上面と天井との間に取り付けられる請求項１記載のダンパを備えていることを特徴とする転倒防止装置。 The rod protrudes upward from the first cylinder, and the center axis of the first cylinder and the rod is inclined at a predetermined angle with respect to a horizontal plane between the upper surface of the article installed on the installation surface and the ceiling. An overturn prevention device comprising the damper according to claim 1 attached to the body.
  6. 　前記第１シリンダ部と前記第２シリンダ部とが並列配置されるように、前記第１シリンダ部と前記第２シリンダ部とを連通する連通部を備えていることを特徴とする請求項２記載のダンパ。 3. A communication portion that communicates the first cylinder portion and the second cylinder portion so that the first cylinder portion and the second cylinder portion are arranged in parallel. Damper.
  7. 　前記連通路は、前記第１シリンダ部と前記第２シリンダ部との間を流れる作動液体に抵抗を付与する第１連通路と、前記第２シリンダ部から前記第１シリンダ部への作動液体の流れのみを許容する逆止弁が設けられた第２連通路とを有し、
    　前記第１ピストンは、前記第１室と前記第２室との間を流れる作動液体に抵抗を付与する第３連通路と、前記第１室から前記第２室への作動液体の流れのみを許容する逆止弁が設けられた第４連通路とを有していることを特徴とする請求項２記載のダンパ。     The communication path includes a first communication path that provides resistance to the working liquid that flows between the first cylinder part and the second cylinder part, and a working fluid that flows from the second cylinder part to the first cylinder part. A second communication path provided with a check valve that allows only flow;
    The first piston has only a third communication path for imparting resistance to the working liquid flowing between the first chamber and the second chamber, and a flow of the working liquid from the first chamber to the second chamber. The damper according to claim 2, further comprising a fourth communication passage provided with a check valve that is allowed.
  8. 　前記ロッドが前記第１シリンダから上方に突出し、前記第１シリンダ及び前記ロッドの中心軸が水平面に対して所定の角度に傾斜した状態で設置面上に設置された物品の上面と天井との間に取り付けられる請求項２記載のダンパを備えていることを特徴とする転倒防止装置。 The rod protrudes upward from the first cylinder, and the center axis of the first cylinder and the rod is inclined at a predetermined angle with respect to a horizontal plane between the upper surface of the article installed on the installation surface and the ceiling. A fall-preventing device comprising the damper according to claim 2 attached to the device.
PCT/JP2017/006290 2016-03-28 2017-02-21 Damper and fall prevention device with said damper WO2017169295A1 (en)

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Publication number Priority date Publication date Assignee Title
JP6487593B1 (en) * 2018-07-06 2019-03-20 Ｋｙｂ株式会社 Fall prevention device
CN111156277A (en) * 2020-03-06 2020-05-15 江苏容大减震科技股份有限公司 Series damper based on fluid and compression principle and working method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4989593U (en) * 1972-11-22 1974-08-02
JPS648440U (en) * 1987-07-06 1989-01-18
JPH102365A (en) * 1996-06-14 1998-01-06 Toyota Motor Corp Hydraulic damper
JP2015006330A (en) * 2013-05-29 2015-01-15 カヤバ工業株式会社 Fall prevention device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4989593U (en) * 1972-11-22 1974-08-02
JPS648440U (en) * 1987-07-06 1989-01-18
JPH102365A (en) * 1996-06-14 1998-01-06 Toyota Motor Corp Hydraulic damper
JP2015006330A (en) * 2013-05-29 2015-01-15 カヤバ工業株式会社 Fall prevention device

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