JP2013064443A - Fall-prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall-prevention device that can prevent an upper frame from tilting with respect to a lower frame and preventing a mounted object from falling or from contacting with peripheral equipment.SOLUTION: The fall-prevention device 13 is mounted on a vibration control device 2 and prevents an upper stand 12 from tilting with respect to a lower stand 11. The fall-prevention device 13 includes: a first swing shaft 64 and a second swing shaft 86, which are installed along a horizontal direction between the lower stand 11 and the upper stand 12 and arranged in parallel along the horizontal direction with the shaft directions parallel to each other; a first arm 62 swingably supported by the first swing shaft 64 as a fulcrum; and a second arm 84 swingably supported by the second swing shaft 86 as a fulcrum. An inner end of the first arm 62 and an inner end of the second arm 84 are rotatably connected; while an outer end of the first arm 62 and an outer end of the second arm 84 are respectively rotatably supported at the upper stand 12 side.

Description

  The present invention relates to a fall prevention device.

  Conventionally, when installing equipment such as outdoor units on the installation surface of a structure (for example, the floor of a building roof), vibration generated by the equipment is prevented from propagating to the structure. For this purpose, a vibration isolator is provided between the installation surface and the equipment.

As such an anti-vibration gantry, for example, as disclosed in Patent Document 1, a lower gantry (lower frame) attached to the installation surface and an upper part of the lower gantry are arranged in a state of being spaced apart from each other. And an anti-vibration member disposed between the lower frame and the upper frame.
According to this configuration, the vibration generated in the equipment can be suppressed by being propagated to the upper pedestal and then absorbed by the vibration isolation member, thereby preventing the vibration from propagating to the lower pedestal and the structure.

JP 2011-7232 A

  However, in the above-described prior art, when a large vibration such as an earthquake occurs and the displacement of the facility equipment in the horizontal direction increases, the equipment swings greatly from the lower end. As a result, there is a possibility that the facility equipment may come into contact with surrounding equipment, piping, wiring, etc., or the equipment itself may fall down.

  Therefore, an object of the present invention is to provide a fall prevention device that can prevent the upper frame from tilting with respect to the lower frame and prevent the fall of the mounted object and the contact with peripheral devices.

In order to solve the above problems, the present invention provides the following means.
A fall prevention device according to the present invention includes a lower frame attached to an installation surface, an upper frame that is disposed above the lower frame in the direction of gravity and attached to a placement object, and the lower frame. An elastic member disposed between the upper frame and having an elastic member acting at least in a direction of separating the lower frame and the upper frame; An overturn prevention device that suppresses tilting of the upper frame, and is erected along the horizontal direction between the lower frame and the upper frame, and along the horizontal direction so that the axial directions are parallel to each other. The first swing shaft and the second swing shaft that are arranged side by side, the first arm that is swingably supported with the first swing shaft as a fulcrum, and the swing with the second swing shaft as a fulcrum Possible support A second arm, and an inner end of the first arm on the second swing shaft side and an inner end of the second arm on the first swing shaft side are rotatable. And being connected to the upper frame side, an outer end portion of the first arm opposite to the second swing shaft, and an outer side of the second arm opposite to the first swing shaft. Each of the end portions is rotatably supported.

According to this configuration, when the placed object reciprocates along the horizontal direction in the event of an earthquake or the like, if the placed object tries to tilt toward one side along the horizontal direction, One side of the frame is displaced downward against the biasing force of the elastic member. Then, the outer end portion of one arm of the first arm and the second arm is pushed down via the upper frame, and swings with its swing shaft as a fulcrum.
When swinging so that the outer end of one arm is pushed down, the inner end of the one arm is displaced upward. Then, the inner side end part of the other side arm rotatably connected to the one side arm is pushed up by the one side arm. For this reason, the arm on the other side is used as a fulcrum, and the arm on the other side swings in the direction opposite to the swinging direction of the arm on one side. Thereby, the other side of the upper frame is displaced downward following the swinging motion of the arm on the other side. Therefore, following the displacement of the placement object in the horizontal direction, the placement object and the entire upper frame are displaced downward. That is, when the vibration in the horizontal direction is generated, each arm swings in the opposite direction with the respective swing shaft as a fulcrum, thereby suppressing the tilting of the upper frame with respect to the lower frame.
Thereby, since the displacement of the mounted object in the horizontal direction can be reduced, it is possible to prevent the mounted object from overturning and interfering with the surroundings.

Further, the lower frame and the upper frame are each formed in one of the horizontal directions to be long, and the first arm and the second arm are respectively extended in the lower frame, And it is provided along the transversal direction of the upper frame.
According to this configuration, by providing the first arm and the second arm along the short direction, it is possible to suppress tilting in the short direction that tends to tilt compared to the longitudinal direction. Thereby, it is possible to reliably prevent the mounted object from overturning and interfering with the surroundings.

  According to the overturn prevention device according to the present invention, it is possible to suppress tilting of the upper frame with respect to the lower frame, and to prevent the placed object from overturning and contact with peripheral devices.

It is a perspective view of the vibration isolator stand in this embodiment. It is a figure in alignment with the AA of FIG. 1, Comprising: It is sectional drawing which shows a connection member. It is a B arrow line view of FIG. FIG. 4 is a cross-sectional view corresponding to the line CC in FIG. 3. It is explanatory drawing for demonstrating the effect | action of a fall prevention apparatus.

Next, embodiments of the present invention will be described with reference to the drawings.
(Anti-vibration stand)
FIG. 1 is a perspective view of a vibration isolator. In the present embodiment, a description will be given of the vibration isolator 1 in which the fall prevention device 13 according to the present invention is attached to the vibration damping device 2.
As shown in the figure, the anti-vibration stand 1 of the present embodiment is equipped with a facility equipment (mounting object) W such as an outdoor unit on the installation surface G of a structure such as a rooftop of a building. It is disposed between the device W and the installation surface G.
Specifically, the anti-vibration mount 1 is connected to a lower mount (lower frame) 11 attached to the installation surface G so as to be able to approach and separate from the lower mount 11 with a space above the lower mount 11. A vibration control device 2 having an upper frame (upper frame) 12 to which the equipment W is attached, and a vibration isolating member (elastic member) 14 disposed between the lower frame 11 and the upper frame 12. It has a fall prevention device 13 that is attached to the vibration device 2 and suppresses the tilting of the upper base 12 with respect to the lower base 11.

The lower pedestal 11 is a member having a rectangular frame shape in plan view, and includes a corner member 21 disposed at a corner and a frame component 22 that bridges between the corner members 21.
First, the frame component 22 is made of a square pipe such as iron, and includes a long body 22a and a pair of short bodies 22b shorter than the long body 22a. The long bodies 22a and the short bodies 22b are arranged in parallel, and the long body 22a and the short body 22b are arranged so as to be orthogonal to each other. Therefore, the undercarriage 11 is formed in a rectangular shape in which the extending direction of the long body 22a is the longitudinal direction and the extending direction of the short body 22b is the short direction. In the following description, in the horizontal plane parallel to the installation surface G, the longitudinal direction of the undercarriage 11 is described as the X direction, the short direction is defined as the Y direction, and the vertical direction perpendicular to the X direction and the Y direction is defined as the Z direction. .
In addition, a plurality of through holes (not shown) penetrating along the Z direction are formed on the upper and lower surfaces of each frame constituent member 22 in the XY direction, and foundation bolts (not shown) are inserted into these through holes. The undercarriage 11 is installed on the installation surface G of the structure.

  The corner member 21 is for joining two frame constituent members 22 orthogonal to each other, that is, the ends of the long body 22a and the short body 22b, and faces the outside in the X direction and the outside in the Y direction. It is formed in an open box shape. And the edge part of the elongate body 22a is joined to the surface which faces the inner side of the X direction among the side surfaces of the corner member 21, and the edge part of the elongate body 22b is joined to the surface which faces the inner side of the Y direction.

The upper base 12 is formed in a rectangular frame shape in plan view having the same outer shape as the lower base 11 described above, and includes a frame constituent material 23. Specifically, the frame constituent member 23 is made of a square pipe such as iron, and includes a long body 23a and a pair of short bodies 23b shorter than the long body 23a. The long bodies 23a and the short bodies 23b are arranged in parallel to each other, and the long bodies 23a and the short bodies 23b are arranged to be orthogonal to each other. And the edge parts of these elongate body 23a and the elongate body 23b are joined.
Further, the upper base 12 includes a plurality of bridge portions 24 extending along the Y direction so as to bridge between the opposing long bodies 23a. Each bridge part 24 is arrange | positioned at intervals along the X direction, and the installation equipment W is being fixed on these bridge parts 24 and the inner peripheral side of the frame structural material 23. FIG.

  The anti-vibration member 14 absorbs vibration propagated from the equipment W to the upper pedestal 12 and reduces the propagation of vibration to the lower pedestal 11, and follows the circumferential direction of the lower pedestal 11 and the upper pedestal 12. A plurality of them are arranged at intervals. As the vibration isolating member 14 of the present embodiment, for example, a member in which a coil spring and rubber are integrally formed or a member in which a coil spring is built in a resin case is used. The vibration isolator 14 has an upper end connected to the lower surface of the upper gantry 12 and a lower end connected to the upper surface of the lower gantry 11, so that both the lower gantry 11 and the upper gantry 12 are connected together. Can be absorbed in relative directions in the horizontal direction (XY direction).

FIG. 2 is a sectional view taken along the line AA of FIG. 1 and showing a connecting member. In FIG. 2, the fall prevention device 13 is omitted for easy understanding.
As shown in FIGS. 1 and 2, a connecting member 25 is provided between the lower base 11 and the upper base 12 so as to connect both 11 and 12 so as to be close to and away from each other along the Z direction. The connecting member 25 has a connecting bolt 26 that connects the lower base 11 and the upper base 12. The connection bolt 26 is inserted from the lower connection hole 27 formed on the upper surface of the corner member 21 in the lower frame 11 toward the upper connection hole 28 formed on the lower surface of the end of the long body 23 a in the upper frame 12. Has been.

Specifically, the base end side of the connecting bolt 26 is fixed to the upper surface of the corner member 21 by a washer 29 and a nut 30.
On the other hand, the leading end side of the connecting bolt 26 sandwiches the lower surface of the long body 23a, the lower side has a gap between the long body 23a and the damping member 31 with the damping material, and the upper side is long. A nut 32 is screwed with a gap between the scale 23a. Thereby, the front end side of the connecting bolt 26 is disposed between the damping member 31 with the damping material and the nut 32 so as to be slidable with respect to the upper base 12 in the upper connecting hole 28. That is, the amount of displacement of the upper base 12 in the Z direction is regulated by the damping member with the damping material 31 and the nut 32. A damper 33 is disposed between the nut 32 and the lower surface of the upper base 12 and in the upper connection hole 28.

(Fall prevention device)
3 is a view taken in the direction of arrow B in FIG.
As shown in FIGS. 1 and 3, the overturn prevention device 13 is attached to both ends of the lower base 11 and the upper base 12 in the X direction in pairs. Specifically, the overturn prevention device 13 includes a lower bracket (lower frame) 41 connected to the lower base 11, an upper bracket (upper frame) 42 connected to the upper base 12, a lower bracket 41, and A first link mechanism 43 and a second link mechanism 44 supported by the upper bracket 42 are provided. In addition, since each fall prevention apparatus 13 consists of the respectively same structure, in the following description, one fall prevention apparatus 13 is demonstrated and description is abbreviate | omitted about the other fall prevention apparatus 13. FIG.

The lower bracket 41 is configured in a C shape when viewed from the Z direction by combining, for example, three L-shaped angles. Specifically, the lower bracket 41 has a pair of extending portions 45 extending outward from each corner member 21 of the lower base 11 in the X direction, and the Y direction so as to bridge between the extending portions 45. And a base portion 46 extending along the line.
The extending portion 45 has an inner end in the X direction located inside the corner member 21 and is fastened and fixed by a bolt 38 with a damper 37 made of a rubber sheet or the like sandwiched between the lower surface of the corner member 21. .
The base portion 46 has both ends in the Y direction joined to the outer end portion in the X direction in the extending portion 45, and is spaced from the short body 22 b of the undercarriage 11 along the X direction. It extends along the Y direction.

The upper brackets 42 are plate-like members that are connected in pairs to both ends in the X direction of the respective long bodies 23 a in the upper frame 12. Specifically, each upper bracket 42 extends from the elongated body 23a toward the outside in the Y direction, and from the outer end portion in the Y direction of the extending portion 47 toward the outside in the X direction. And an extending mounting piece 48.
The extending portion 47 is fastened and fixed by a bolt 51 with an inner end portion in the Y direction sandwiching a damper 49 made of a rubber sheet or the like on the upper surface of the long body 23a.
The mounting piece 48 is formed in an L shape that is bent downward as viewed from the Y direction, and is joined to the outer end portion in the Y direction of the extending portion 47 and extends outward in the X direction. ing.

The first link mechanism 43 includes a first stay 61 erected from the lower bracket 41 upward in the Z direction, and a first arm 62 supported by the first stay 61 so as to be swingable. ing.
The first stay 61 is a plate-like member having the Z direction as a longitudinal direction, and a lower end portion of the first stay 61 is fastened and fixed by a bolt 63 near the one end side from the center portion in the Y direction of the base portion 46 of the lower bracket 41. Has been.

  The first arm 62 is a plate-like member having a thickness direction in the X direction and extending along the Y direction. The first arm 62 extends along the Z direction with respect to the first stay 61 with the first swing shaft 64 as a fulcrum. It is supported so that it can swing. Specifically, as shown in FIG. 4, round holes 65 and 66 are formed in the upper end portion of the first stay 61 and the first arm 62, respectively. A first swing shaft 64 is inserted through a collar 67 made of resin or the like. The first swing shaft 64 is formed in a column shape extending along the X direction, and is disposed in the round holes 65 and 66 to support the first stay 61 and the first arm 62, and the support portion 71. Threaded portions 72 respectively projecting outward from the both ends of the shaft toward the outside in the axial direction (X direction). The nuts 74 are screwed onto the screw portions 72 via the washers 73, so that the first swing shaft 64 is assembled to the first stay 61 and the first arm 62.

As shown in FIGS. 1 and 3, an oval long hole 81 is formed in the outer end portion of the first arm 62 with the extending direction of the first arm 62 as the major axis direction. Bolts 82 are inserted through a collar (not shown). The bolt 82 is inserted into a through hole (not shown) formed in the attachment piece 48 of the upper bracket 42 and is fastened and fixed to the attachment piece 48. Therefore, the first arm 62 is configured to be rotatable about the bolt 82 according to the swinging motion with the first swinging shaft 64 as a fulcrum, and the elongated hole 81 extends from the bolt 82. It is configured to be movable along the current direction.
In addition, an oblong hole (not shown) having an extension direction of the first arm 62 as a major axis direction is formed at an inner end portion of the first arm 62.

On the other hand, the second link mechanism 44 has the same configuration as that of the first link mechanism 43 described above. The second link mechanism 44 includes a second stay 83 erected upward from the lower bracket 41 in the Z direction, and a second stay 83. And a second arm 84 supported to be swingable.
The second stay 83 is a plate-like member whose longitudinal direction is the Z direction, and the lower end of the second stay 83 is fastened by a bolt 85 near the other end side from the center in the Y direction of the base portion 46 of the lower bracket 41. It is fixed.

  The second arm 84 is a plate-like member having a thickness direction in the X direction and extending along the Y direction, and along the Z direction with respect to the second stay 83 with the second swing shaft 86 as a fulcrum. It is supported so that it can swing. Specifically, as in the first link mechanism 43 described above, as shown in FIG. 4, round holes 65 and 66 are formed in the upper end portion of the second stay 83 and the second arm 84, respectively. A second swing shaft 86 is inserted into the round holes 65 and 66 through a collar 67 made of resin or the like. The second oscillating shaft 86 is arranged in parallel with the first oscillating shaft 64 spaced in the Y direction, and the axial direction is arranged in parallel with the first oscillating shaft 64.

As shown in FIGS. 1 and 3, an oval long hole 91 having an extending direction as a major axis direction is formed at the outer end of the second arm 84, and a collar (not shown) is formed in the long hole 91. A bolt 92 is inserted through the pin. The bolt 92 is inserted into a through hole (not shown) formed in the attachment piece 48 of the upper bracket 42 and is fastened and fixed to the attachment piece 48. Therefore, the second arm 84 is configured to be rotatable about the bolt 92 as a fulcrum according to the oscillating motion with the second oscillating shaft 86 as a fulcrum, and the elongated hole 91 extends from the bolt 92. It is configured to be movable along the current direction.
In addition, an oval elongated hole 93 having the extending direction as the major axis direction is also formed at the inner end of the second arm 84.

And in the long hole (for example, long hole 93) formed in the inner side edge part of each arm 62 and 84 of the 1st link mechanism 43 mentioned above and the 2nd link mechanism 44, it is via a collar which is not illustrated. Three swing shafts 95 are inserted. That is, the arms 62 and 84 are connected to each other so as to be rotatable about the third swing shaft 95 as a fulcrum.
In this case, each of the arms 62 and 84 has a long hole (relative to each other) with respect to the third swing shaft 95 according to the swing motion about the first swing shaft 64 and the second swing shaft 86. For example, it is configured to be movable along the extending direction of the long hole 93). Further, in the present embodiment, the first base 62 and the second arm 84 are moved from the outside in the Y direction by the lower base 11 and the upper base 12 being urged away from each other by the vibration isolation member 14. It is held in an initial state inclined downward as it goes inward.

(Function)
Next, the effect | action of the fall prevention apparatus 13 mentioned above is demonstrated. In the following description, a case will be described in which the equipment W reciprocates mainly in the Y direction among horizontal vibrations due to large vibrations such as earthquakes. FIG. 5 is an explanatory diagram for explaining the operation of the overturn prevention device.
As shown in FIG. 5A, when the equipment device W reciprocally vibrates along the Y direction, for example, when the equipment device W is displaced toward the + Y direction (for example, the first link mechanism 43 side), the equipment device W has a lower end portion. Sway along the Y direction from the starting point, for example, to tilt toward the + Y direction. Then, according to the tilting operation of the equipment W in the + Y direction, the + Y direction side of the upper base 12 is displaced downward against the urging force of the vibration isolation member 14. As a result, the outer end of the first arm 62 is pushed down, and the first arm 62 swings around the first swing shaft 64 (for example, counterclockwise).

  When swinging so that the outer end of the first arm 62 is pushed down, the inner end of the first arm 62 is displaced upward. Then, the inner end of the second arm 84 that is rotatably connected to the first arm 62 via the third swing shaft 95 is pushed up by the first arm 62. Therefore, with the second swing shaft 86 as a fulcrum, the second arm 84 swings counterclockwise (for example, clockwise) from the swing direction of the first arm 62. As a result, the −Y direction side (the second link mechanism 44 side) of the upper base 12 to which the second arm 84 is connected is displaced downward following the swinging motion of the second arm 84. Accordingly, as shown in FIG. 5B, the equipment device W and the entire upper base 12 are displaced downward following the displacement of the equipment device W in the + Y direction. In other words, when the vibration in the Y direction is generated, the link mechanisms 43 and 44 swing in the opposite directions around the swing shafts 64 and 86, so that the tilt of the upper mount 12 with respect to the lower mount 11 can be suppressed. .

  Thereafter, the upper base 12 is restored upward with respect to the lower base 11 by the biasing force of the vibration isolating member 14, and the outer end portions of the first arm 62 and the second arm 84 are pulled up. It swings in the opposite direction to the swing operation and returns to the initial state.

On the other hand, when the equipment device W is displaced in the −Y direction, the equipment device W tries to tilt in the −Y direction with the lower end as a starting point. Then, in accordance with this tilting operation, the −Y direction side of the upper base 12 is displaced downward against the urging force of the vibration isolation member 14, and the outer end portion of the second arm 84 is pushed down, so that the second The arm 84 swings around the second swing shaft 86 as a fulcrum (for example, clockwise).
When the outer end of the second arm 84 is swung so as to be pushed down, the inner end of the second arm 84 is displaced upward. Then, the inner end portion of the first arm 62 rotatably connected to the second arm 84 via the third swing shaft 95 is pushed up by the second arm 84. Therefore, with the first swing shaft 64 as a fulcrum, the first arm 62 swings counterclockwise (for example, counterclockwise) from the swing direction of the second arm 84. As a result, the + Y direction side of the gantry 12 is displaced downward following the swinging motion of the first arm 62. As a result, following the displacement of the equipment device W in the + Y direction, the equipment device W and the entire upper frame 12 are displaced downward.
By repeating the above operation, the vibration in the Y direction is attenuated by the vibration isolating member 14 while converting the displacement in the Y direction into the displacement in the Z direction as a result.

Therefore, according to the present embodiment, when the vibration in the Y direction is generated, the link mechanisms 43 and 44 swing in the opposite directions around the respective swing shafts 64 and 86, thereby Tilt of the table 12 can be suppressed.
Thereby, since the displacement to the Y direction of the installation equipment W can be reduced, the fall of the installation equipment W and interference with the periphery can be prevented.

Moreover, in this embodiment, since the fall prevention apparatus 13 was each provided in the both sides of the X direction, the installation equipment W can be supported stably.
Further, since the first arm 62 and the second arm 84 are provided along the short direction (Y direction) of the lower base 11 and the upper base 12, the first arm 62 and the second arm 84 are inclined in a short direction that is more easily tilted than the long direction (X direction). Can be suppressed. Thereby, it is possible to reliably prevent the equipment device W from overturning and interfering with the surroundings.
Further, by providing the vibration isolation member 14 between the lower base 11 and the upper base 12, the lower base 11 and the upper base 12 (vibration control device 2), the first arm 62 and the second arm 84 (the overturn prevention device). 13) can be energized. Therefore, the number of parts can be reduced as compared with the case where the elastic members are provided separately, and the increase in manufacturing cost can be suppressed.

The technical scope of the present invention is not limited to the above-described embodiments, and includes those in which various modifications are made to the above-described embodiments without departing from the spirit of the present invention. In other words, the configuration described in the above-described embodiment is merely an example, and can be changed as appropriate.
For example, in the above-described embodiment, the lower frame and the upper frame of the present invention are not limited to rectangular frame shapes such as the lower frame 11 and the upper frame 12, and can be appropriately changed in design.
In the above-described embodiment, the case where the first arm 62 and the second arm 84 are provided on the lower base 11 and the upper base 12 via the brackets 41 and 42, respectively. 12, the first arm 62 and the second arm 84 may be directly provided.

Moreover, although embodiment mentioned above demonstrated the case where a pair of fall prevention apparatus 13 was provided in the both sides of a X direction, it is not restricted to this. For example, a plurality can be provided along the X direction, or one can be provided at the center in the X direction.
Furthermore, although the case where the first arm 62 and the second arm 84 are provided along the Y direction has been described in the above-described embodiment, the present invention is not limited thereto, and the first arm 62 and the second arm 84 are provided along the X direction, or the X direction and the Y direction. It may be provided on both sides of each.
In addition, an elastic member that urges the first arm 62 and the second arm 84 in a direction to return toward the initial state described above may be provided separately from the vibration isolation member 14.

DESCRIPTION OF SYMBOLS 1 ... Vibration-proof stand 2 ... Damping device 11 ... Lower stand (lower frame) 12 ... Upper stand (upper frame) 13 ... Fall prevention device 14 ... Vibration-proof member (elastic member) 41 ... Lower bracket (lower frame) 42 ... Upper bracket (upper frame) 62 ... First arm 64 ... First swing shaft 84 ... Second arm 86 ... Second swing shaft

Claims (2)

A lower frame attached to the installation surface side;
An upper frame that is disposed above the lower frame in the direction of gravity and attached to the object to be placed;
An elastic member disposed between the lower frame and the upper frame and having an elastic member acting at least in a direction separating the lower frame and the upper frame; and
A fall prevention device that suppresses tilting of the upper frame with respect to the lower frame,
A first rocking shaft and a second rocking shaft which are erected between the lower frame and the upper frame along the horizontal direction so that the axial directions are parallel to each other. A dynamic axis,
A first arm supported so as to be swingable about the first swing shaft;
A second arm supported so as to be swingable with the second swing shaft as a fulcrum,
The inner end of the first arm on the second swing shaft side and the inner end of the second arm on the first swing shaft side are rotatably connected,
On the upper frame side, an outer end portion of the first arm opposite to the second swing shaft and an outer end portion of the second arm opposite to the first swing shaft rotate. A fall prevention device characterized by being supported in a movable manner. The lower frame and the upper frame are each formed with a long one of the horizontal directions,
2. The overturn according to claim 1, wherein the first arm and the second arm are provided such that each extending direction thereof is along a short direction of the lower frame and the upper frame. Prevention device.

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