JP2015006330A5

JP2015006330A5 -

Info

Publication number: JP2015006330A5
Application number: JP2014111705A
Authority: JP
Filing date: 2014-05-29
Publication date: 2015-12-24
Anticipated expiration: 2034-05-29

Description

ダンパ３は、シリンダ３１内に圧縮ガスとしての窒素ガス４２が封入され、窒素ガス４２のガス圧によって伸長方向に作用するばね力を有する。つまり、本実施形態では、ダンパ３を伸長方向に付勢する付勢手段としてガスばねが用いられる。ダンパ３は、ロッド側圧力室３２に面するピストン３４の受圧面積と反ロッド側圧力室３３に面するピストン３４の受圧面積との差によって、伸長方向のばね力を発生する。ダンパ３が図３に示す向きとなるように転倒防止装置１００を設置した場合には、図３に示すように、窒素ガス４２は上方へと移動してロッド側圧力室３２に封入されることになる。一方、ダンパ３が図３に示す向きとは１８０度逆向きとなるように転倒防止装置１００を設置した場合には、窒素ガス４２は上方へと移動して反ロッド側圧力室３３に封入されることになる。 The damper 3 is nitrogen gas 42 as the compressed gas in the cylinder 31 is sealed, it has a spring force acting on the extended direction by the gas pressure of the nitrogen gas 42. That is, in this embodiment, a gas spring is used as a biasing unit that biases the damper 3 in the extending direction. The damper 3 generates a spring force in the extending direction due to the difference between the pressure receiving area of the piston 34 facing the rod side pressure chamber 32 and the pressure receiving area of the piston 34 facing the non-rod side pressure chamber 33. When the overturn prevention device 100 is installed so that the damper 3 is oriented as shown in FIG. 3, the nitrogen gas 42 moves upward and is enclosed in the rod side pressure chamber 32 as shown in FIG. 3. become. On the other hand, when the overturn prevention device 100 is installed so that the damper 3 is 180 degrees opposite to the direction shown in FIG. 3, the nitrogen gas 42 moves upward and is enclosed in the anti-rod side pressure chamber 33. Will be.

Claims

A fall prevention device for preventing an article from falling,
An article-side base that can contact the article;
A ceiling-side base that can contact the ceiling;
Each of both end portions is rotatably connected to the article-side base portion and the ceiling-side base portion, and a damper that generates a damping force by an expansion / contraction operation associated with the shaking of the article,
Biasing means for biasing the damper in the extending direction;
A fall prevention device comprising:

The damper is
A cylinder in which a working fluid is sealed and is rotatably connected to one of the article-side base portion and the ceiling-side base portion;
A piston that is slidably inserted into the cylinder and divides the inside of the cylinder into two pressure chambers, a rod-side pressure chamber and an anti-rod-side pressure chamber ;
A rod having one end connected to the piston and the other end rotatably connected to the other of the ceiling-side base and the article-side base;
A damping force generating portion provided on the piston and generating a damping force by applying a resistance to the flow of the working fluid between the two pressure chambers accompanying the expansion and contraction operation of the damper;
2. The overturn prevention device according to claim 1, wherein the piston is provided with a check valve that allows only a flow of the working fluid between the two pressure chambers accompanying the extension operation of the damper. 3.

Before SL biasing means overturning prevention device according to claim 2, compressed gas in the cylinder is characterized in that it is a gas spring enclosed.

The overturn prevention device according to claim 2, wherein the biasing means is a spring provided by being compressed in the anti-rod side pressure chamber.

The damper overturning prevention device according to claim 1, any one of the four inclined to, characterized in that disposed between the ceiling and the article with respect to the vertical direction.

One end of the damper is provided with an article-side bracket that is rotatably connected to the article-side base portion,
The other end side of the damper is provided with a ceiling side bracket rotatably connected to the ceiling side base portion,
The damper is arranged so as to be inclined with respect to a vertical direction by arranging the ceiling side bracket at a position farther from the wall along which the back surface of the article extends than the article side bracket. The fall prevention device according to 5 .

The article-side base has a base that contacts the article,
The ceiling side base part has a base part in contact with the ceiling,
The damper is arranged to be inclined with respect to a vertical direction by forming a width of the base portion of the ceiling side base portion larger than a width of the base portion of the article side base portion. Item 6. The fall prevention device according to Item 5.

One end of the damper is provided with an article-side bracket that is rotatably connected to the article-side base through a pin,
On the other end side of the damper, a ceiling-side bracket that is rotatably connected to the ceiling-side base portion via a pin is provided.
The fall prevention device according to any one of claims 1 to 5.

The fall prevention device according to any one of claims 5 to 8, wherein an inclination angle of the damper with respect to a vertical direction is in a range of 15 degrees or more and 25 degrees or less.

At least one of the article side base portion and the roof side base portion, according to any one of claims 5 to 9, characterized in that the display unit is attached showing a mounting angle of said damper with respect to the vertical direction Fall prevention device.

The fall prevention device according to any one of claims 5 to 10 , further comprising a jig that contacts the damper and sets an attachment angle of the damper with respect to a vertical direction.