JP5753204B2 - Gas container tipping prevention device - Google Patents

Description

  The present invention relates to a tipping prevention tool for a gas container.

Many general gas containers filled with high-pressure gas or the like are placed independently. If the gas container falls, the cap, valve, and instruments provided on the head of the gas container may be deformed or damaged. In some cases, there is a risk of gas leakage or explosion. In addition, the double-shell structure gas container further accommodates the container so as to float inside, and the portion supporting the inner container may be deformed or damaged by an impact such as a fall. The gas container cannot be used after it falls because of the danger of deformation or breakage of these parts.
Under such circumstances, conventionally, when storing the gas container, the body of the gas container is pressed against the wall with a chain or a belt so that the gas container does not fall down due to an earthquake or the like (see Patent Document 1). . In addition, a plurality of pillars are set up on a stand, and a gas container is placed between the plurality of pillars, and the plurality of pillars are connected by a chain to prevent the gas container from overturning (patent) Reference 2).

Japanese Utility Model Publication No. 5-92599 JP 2000-257798 A

By the way, the fall prevention methods of Patent Documents 1 and 2 are reliable fixing methods at the final installation place where the gas container is not moved so much or at night when the gas filling factory is not operating.
However, for example, at a collection and delivery center when transporting a gas-filled container or during a gas filling operation in a factory, the gas container is transported to a place with a wall surface or a stand for every unit, It is very troublesome to attach and remove multiple chains and belts each time.
An object of the present invention is to provide a gas container overturn prevention device that can reliably prevent overturning despite being easy to attach and detach.

The above object is achieved according to the present invention, a ring having a diameter equal to the diameter of the cylindrical body portion to the upper portion of the gas container is fixed, by connecting to what the ring of the plurality of the gas container, the gas An overturn prevention device for preventing the container from toppling over, wherein the adjacent portions of the rings of the gas containers adjacent to each other are inward, and are hung on the adjacent portions. And a two-dimensional suspension portion, and two extending portions extending from the both ends of the suspension portion by a distance dimension that is a distance between each other including the thickness of each adjacent portion, and the whole is spiral, This can be solved by a tipping prevention tool provided with a protruding portion that protrudes substantially along the spiral direction at each end of the two extending portions.

According to the configuration of the invention described above, the overturn prevention device is substantially U-shaped or U-shaped so that the adjacent portions of the rings of the gas containers adjacent to each other are hung on the adjacent portions. Has a suspension. For this reason, if it hangs so that the substantially U-shaped or substantially U-shaped opening of the suspension part is placed on the lower side and spans each adjacent part, the two rings will move in a direction away from each other. However, it is possible to restrict the movement of the suspended portion in the separated direction when it hits the portion (opposing portion) that is the opposite side of the substantially U-shape or the substantially U-shape of the suspension portion. In addition, the gas container falls over when the head is tilted largely starting from the bottom, but the tipping prevention device is attached to the ring at the top of the gas container. The container can be prevented from falling.
Here, as a result of the experiment, when the gas container moves up and down due to the vertical shaking of the earthquake with the fall prevention device hung on the adjacent part, the substantially U-shaped or substantially U-shaped opening side of the suspension part It was found that the inner ring (adjacent part) hits. And the opening part side of this suspension part is a part where the space | interval of the opposing part of a suspension part can be expanded most easily. Therefore, if an opening part side expands and rotates, there exists a high risk that a fall prevention tool will fall from an adjacent part. However, the overturn prevention device of the present invention has two extending portions extending from both ends of the suspension portion by a distance dimension that is the distance between each adjacent portion including the thickness of each adjacent portion. At each end portion of the extending portion, a protruding portion that protrudes substantially along the spiral direction is provided. Then, even if a force is applied in a direction in which the inner ring hits the opening side (extension part side) where the suspension part is most likely to expand and the opening part is expanded, the suspension part is provided at each end part of the two extension parts. The ring also hits the protruding portion, and the movement in the expanding direction can be suppressed. Therefore, the fall prevention tool can be prevented from dropping from the adjacent portion, and the connected state of the two rings can be maintained.
And since this whole fall prevention tool is spiral, if each adjacent part of the ring which adjoins mutually is inserted in a helical clearance (for example, space | interval of two extending | stretching parts), each said adjacent part Are placed inside the spiral, and are hung so as to be bridged over the adjacent portions, so that the fall prevention tool can be easily attached.

Preferably, the distance between the two extending portions is greater than the thickness of any of the adjacent portions, and the spacing when the adjacent portions are at the same height. It is characterized by a small size compared to the size.
If it does so, the adjacent part of two rings cannot be simultaneously passed with respect to the space | interval of two extending | stretching parts, but in order to put an adjacent part inside a spiral fall prevention device, two rings It is necessary to lay down the fall prevention tool substantially along the connecting direction connecting the two, and to pass through each adjacent portion one by one with respect to the interval between the two extending portions. And if it knows how to pass this, if the fall prevention tool is simply inserted substantially along the connecting direction connecting the two rings, the fall prevention tool can be hung by putting the adjacent portion inside. On the other hand, it is difficult for the fall prevention tool to move opposite to the insertion movement due to an earthquake, and the fall prevention tool can be effectively prevented from coming off the ring.
Note that the separation dimension when the adjacent portions are at different heights is larger than the separation dimension when the adjacent portions are at the same height. For this reason, if the distance between the two extending portions is based on the separation dimension when the adjacent portions are at different heights, the gas containers in which the adjacent portions are at the same height are connected. In such a case, there is a risk of passing through the adjacent parts at the same time, which increases the risk of dropout. Therefore, it is preferable that the distance between the two extending portions be smaller than the separation when the adjacent portions are at the same height.

Preferably, the suspension portion is substantially U-shaped having two large bent portions, and the tip of the projecting portion and the two large bent portions in the spiral inner space. The distance between the inner periphery of the bent part farthest from the tip is larger than the separation dimension, and the tip of the protruding part and the two large bent parts in the spiral inner space A distance between the bent portion closest to the tip is smaller than the separation dimension.
For this reason, as described above, after the fall prevention tool is once laid, the adjacent portions are continuously passed through the interval between the two extending portions, and the adjacent portions are placed inside the spiral, and then the protrusions If an adjacent portion is arranged between the tip and the periphery of the bent portion furthest away from the tip, the fall prevention tool once laid down can be erected and the fall prevention device can be attached to the adjacent portion.
Since the distance between the tip of the protrusion and the bent portion closest to the tip of the two large bent portions is smaller than the separation dimension, the distance between the tip of the protrusion and the periphery of the bent portion farthest from the tip If the adjacent portion is not disposed in the ring, the fall prevention tool does not come off the ring, and the connection of the gas containers can be maintained well.

Preferably, the protrusion and the portion of the suspension that are closest to the protrusion are substantially parallel to each other.
If it does so, when passing the adjacent part of a ring between a protrusion part and the suspension part adjacent to this following the space | interval of two extending | stretching parts, the said substantially parallel part becomes a guide and it becomes easy to pass a ring. .

  As described above, according to the present invention, the present invention can provide a tipping prevention tool for a gas container that can surely prevent the tipping over despite being easy to attach and detach.

The state figure which equipped the gas container with the fall prevention tool which concerns on embodiment of this invention. FIGS. 2A and 2B are partially enlarged perspective views in which the vicinity of the overturn prevention tool of FIG. 1 is enlarged, in which FIG. 2A shows a mounted state in a normal state, and FIG. The perspective view from the top of the fall prevention tool which concerns on embodiment of this invention. The perspective view from the downward direction of the fall prevention tool of FIG. The front view of the fall prevention tool of FIG. The rear view of the fall prevention tool of FIG. 3 (same as the front view of FIG. 5). The top view of the fall prevention tool of FIG. The bottom view of the fall prevention tool of FIG. The right view of the fall prevention tool of FIG. The left view of the fall prevention tool of FIG. 3 (same as the right view of FIG. 9). The BB expansion end view of FIG. FIG. 8 is an AA enlarged end view of FIG. 7. Explanatory drawing of the usage method of the fall prevention tool which concerns on embodiment of this invention. Explanatory drawing of the usage method following FIG. 13 of the fall prevention tool which concerns on embodiment of this invention. The experimental condition of the fall prevention tool which concerns on embodiment of this invention. The experimental result based on the difference in the connection method of the fall prevention tool which concerns on embodiment of this invention. The 1st modification of the fall prevention tool which concerns on embodiment of this invention. The 2nd modification of the fall prevention tool which concerns on embodiment of this invention. The 3rd modification of the fall prevention tool which concerns on embodiment of this invention. The 4th modification of the fall prevention tool which concerns on embodiment of this invention. The front view of the 5th modification of the fall prevention tool which concerns on embodiment of this invention. The right view of the 5th modification of the fall prevention tool which concerns on embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments. Moreover, the same code | symbol attached | subjected in each figure has the same structure.
First, the outline | summary of a fall prevention tool is demonstrated.
[Overview of the fall prevention tool 10]
FIG. 1 is a state diagram in which a fall prevention tool 10 according to an embodiment of the present invention is mounted on a gas container 2. 2 is a partially enlarged perspective view in which the vicinity of the overturn prevention device 10 of FIG. 1 is enlarged, FIG. 2 (a) is a normal wearing state, and FIG. 2 (b) is a diagram showing a state during an earthquake. It is.
As shown in these drawings, the overturn prevention device 10 is a fastener that prevents the gas container 2 from overturning by connecting the rings 4 and 4 fixed to the upper portions 2a of the plurality of gas containers 2 and 2. The rod-shaped object is formed in a spiral shape as a whole.

The overturn prevention device 10 can be used for a container filled with a high-pressure gas such as a compressed gas or a liquefied gas. In particular, a liquefaction that stores a large amount of liquefied gas such as oxygen, nitrogen, and argon that consumes a large amount of gas. The liquefied gas container is illustrated as an example in the figure. That is, the liquefied gas container which is the gas container 2 is called LGC (Liquid Gas Container), and there are many large-sized ones which are higher than the bottom area, and the large size makes handling easy. There are many types of portable containers in which a ring 4 for transportation called a handle is provided at the top, and the tipping prevention tool 10 can be suitably used for this large portable container.
In addition, the ring 4 of FIG. 1 has a circular longitudinal section, and a circular shape having a diameter L2 when viewed from above. The diameter L2 is substantially the same as the diameter L1 of the cylindrical body 2c of the gas container 2.

And the fall prevention tool 10 connects the some rings 4 and 4 fixed to the upper part of the some gas containers 2 and 2. As shown in FIG. In other words, the overturn prevention device 10 is entirely spiral (see FIG. 2), and a plurality of gas containers 2, 2 are adjacent to each other, and adjacent portions 4-1 of the plurality of rings 4, 4 adjacent to each other. , 4-2 is inserted through the spiral gap and disposed in the inner space S1, and is suspended over the adjacent portion 4-1 and the adjacent portion 4-2.
In the case of the figure, the gap W1 between the adjacent gas containers 2 and 2 (similar to the gap W3 between the adjacent rings 4 and 4) is approximately 0 to 50 mm, although it depends on the way the user is placed.
In addition, although the fall prevention tool 10 of FIG. 1 has connected the rings 4 and 4 of the two gas containers 2 and 2, the fall prevention tool 10 of this invention is not restricted to such a form. It is more preferable that three or more rings of three or more gas containers are continuously connected in the manner of connecting the two rings 4 and 4.
Further, in FIG. 1, the fall prevention tool 10 is used for the rings 4 and 4 having the same height, but the present invention is not limited to such an embodiment, and is shown in a diagram surrounded by a one-dot chain line in FIG. 1. As shown, the ring 4 may be connected to a ring 5 having a height different from that of the ring 4. In this case, if an attempt is made to connect rings having different heights, the overturning prevention device 10 becomes too large. For example, if it is used for the rings 4 and 4 having the same height, the extra instruments 7 and 8 are extraneous. There is a risk of hitting a spot. For this reason, the fall prevention tool 10 is adapted to be usable for the ring 5 having a height difference H of about 65 mm at maximum with respect to the ring 4.

[Details of fall prevention tool 10]
Next, details of the overturn prevention tool 10 will be described with reference to FIGS.
The overturn prevention device 10 is entirely spirally formed by a suspension part 12 that spans between two rings 4 and 4 and two extension parts 15 and 15 that extend from both ends 12f and 12g of the suspension part 12. It is made into a shape.
The suspension portion 12 is a portion in the range of TR in FIG. 7, and this range is, as shown in FIG. 2A, the adjacent portions 4-1 and 4-2 where the two rings 4 and 4 are adjacent to each other. Is a portion that is hung on the adjacent portions 4-1 and 4-2 at the same time, and the front view is substantially U-shaped or substantially U-shaped.
As shown in FIG. 5, the suspension portion 12 of the present embodiment has a substantially U-shape when viewed from the front. As shown in FIG. An upper portion 12a placed on the opposite sides, opposing portions (opposing portions facing each other when viewed from the front) 12b, 12c, and upper portions 12a and 12b, 12c. It consists of two bent portions 12d and 12e in between, and is in a suspended state.

  The length L3 of the upper portion 12a shown in FIG. 5 is the same as the length in the horizontal direction of the inner space S1, and the adjacent portions 4-1 and 4 of the two adjacent rings 4 and 4 shown in FIG. -2 is formed to be larger than the separation dimension W2 that is the distance between each other including the thickness of -2 (the separation dimension W2 is the thickness of the adjacent part 4-1, the thickness of the adjacent part 4-2, and the adjacent part 4- 1 and the gap W3 between the adjacent portions 4-2. That is, the thickness (diameter L4) of the ring 4 of a general liquefied gas container is 28 to 34 mm, and the gap W3 between the adjacent portion 4-1 and the adjacent portion 4-2 is about 0 to 50 mm (usually almost 0). Therefore, when the rings 4 and 4 having the same height are connected to each other, the assumed maximum separation dimension W2 is 118 mm. Further, in the present embodiment, as shown in the diagram surrounded by the one-dot chain line in FIG. 1, the rings 4 and 5 having the height difference can be connected, and in this case, the maximum height difference H is about 65 mm. Therefore, the maximum separation dimension W4 when the rings 4 and 5 having different heights are connected to each other is about 135 mm, and in order to be able to be used uniformly for as many kinds of gas containers as possible, FIG. The length L3 of the upper part 12a can be set to 135 mm corresponding to the maximum dimension of about 135 mm of the separation dimension W4 in FIG. However, the gap W3 between the adjacent portion 4-1 and the adjacent portion 4-2 can be set to 0 mm by the effort of the user, and it is more difficult for the plurality of gas containers to come into close contact with each other. Considering the significance of directing the gas containers in close contact with each other, it is preferable to set the length L3 within the range of about 135 mm. The minimum distance dimension is when the diameter of each of the adjacent portions 4-1 and 4-2 is 28 mm, there is no gap between the adjacent portions 4-1 and 4-2, and the height difference H is 0 mm. Therefore, the length L3 of the upper part 12a needs to be at least about 56 mm (this embodiment is 75 mm).

  As shown in FIG. 2A, the facing portions 12b and 12c are arranged along a substantially vertical direction in a normal suspension state where the facing portions 12b and 12c are suspended from the rings 4 and 4 having the same height. With regard to the length L5 (see FIG. 5) of the facing portions 12b and 12c, considering the usage method (see FIG. 13) for laying down, the distance between the rings 4 and 4 having no difference in height is at least separated. It is larger than the dimension W2, and preferably larger than the separation dimension W4 when the rings 4 and 5 having different heights are connected. However, if the length L5 of the facing portions 12b and 12c is too long, when the fall prevention tool 10 is laid down and attached, it is difficult to hit a valve or an instrument or to suppress the inclination of the container when it falls. The required length is preferred because of fears. In this embodiment, it is about 115 mm.

The two bent portions 12d and 12e are greatly bent portions, and as shown in FIG. 5, the upper portion 12a and the facing portions 12b and 12c are curved so as to be substantially perpendicular to each other when viewed from the front. Thereby, in the suspension state of FIG. 2A, the situation in which the adjacent portions 4-1 and 4-2 rotate around the axis is reduced as compared with the case where the suspension portion is C-shaped. Therefore, there is a possibility that the tipping prevention tool 10 may fall off the ring 4 when rotated, but the rotation itself can be prevented as much as possible to prevent the falling off from the ring 4.
Further, as shown in FIG. 4, the tipping prevention tool 10 has a plurality of convex portions 20 arranged at a predetermined interval in a spiral direction P in a spiral shape on at least the inner side surface (the inner space S1 side). Thereby, rotation of the fall prevention tool 10 is prevented. In addition, the convex part 20 of this embodiment is arranged not only on the inner side surface but also on the outer side surface, and serves as a slip stopper when grasped.

As shown in FIGS. 2 to 4, the extending portion 15 is separated from each of the both ends 12 f and 12 g of the suspension portion 12 by a separation dimension (which is the distance between the adjacent portions 4-1 and 4-2). In the case of this embodiment, (corresponding to W4 in FIG. 1) is a substantially extending rod shape, and is formed substantially along the spiral direction P of the spiral. For this reason, as shown in FIG. 2B, even if the gas container moves up and down due to the vertical shaking of the earthquake, the adjacent portions 4-1 and 4-2 hit the extending portion 15, and the overturn prevention tool 10 becomes the ring 4. , 4 can be effectively prevented from falling off. Note that the term “approximately extended” as used herein means that the adjacent portions 4-1 and 4-2 can collide with the extending portion 15 as shown in FIG. As such, it means to extend from both ends 12f and 12g of the suspension part 12. Therefore, the extending portion 15 of the present embodiment extends by an amount corresponding to the separation dimension W4 in FIG. 1, but the present invention is not limited to this, and consideration is given to variations due to the height difference H and the gap W3 that are different for each gas container. However, it may be stretched by about 0 to 50 mm longer than the separation dimension W4.
Moreover, although the extending | stretching part 15 of this embodiment is made into linear form in order to prevent rotation, this invention is not restricted to this, You may curve.
A plurality of convex portions 20 are also formed on the inner side of the extending portion 15 to prevent the tipping prevention tool 10 from rotating.

The distance S2 between the two extending portions 15 and 15 is larger than the thickness L4 of the ring 4 (that is, the diameter of the adjacent portions 4-1 and 4-2). The adjacent portions 4-1 and 4-2 are inserted, and the adjacent portions 4-1 and 4-2 can be inserted into the inner space S1 of the fall prevention tool 10.
Further, the distance S2 between the two extending portions 15 and 15 is set to be smaller than the separation dimension W2 when the two adjacent portions 4-1 and 4-2 are at the same height. Therefore, the two adjacent portions 4-1 and 4-2 cannot be simultaneously passed with respect to the interval S2, and the toppling prevention device 10 has a structure that is not easily detached from the ring 4. In addition, as shown in the figure surrounded by the one-dot chain line in FIG. 1, if the separation dimension W4 when there is a height difference between the two rings 4, 5 is used as a reference, the two rings 4, 4 of the same height are mounted. In this case, the fall prevention tool 10 may rotate and fall out of the interval S2 due to an earthquake, so the interval S2 is compared to the separation dimension W2 when the adjacent portion 4-1 and the adjacent portion 4-2 are at the same height. Is preferably small.
In order to put the adjacent portions 4-1 and 4-2 in the inner space S1, the fall prevention device 10 is laid along substantially the connecting direction (the left-right direction in FIG. 2) connecting the two rings 4 and 4. The adjacent portions 4-1 and 4-2 may be continuously passed one by one with respect to the interval S2 between the extending portions 15 and 15 of the book (see FIG. 13).

And the protrusion part 30 which protrudes substantially along the spiral direction P of the spiral is provided in each edge part 15a of these two extending | stretching parts 15 and 15. As shown in FIG. In the case of this embodiment, in the normal suspension state of FIG. 2A, the rising portion rises upward from the end portion 15 a of the extending portion 15.
For this reason, as shown in FIG. 2 (b), the fall prevention device 10 is pushed up by an earthquake, and the two rings 4 and 4 are separated from each other in this state (directions of arrows + R and -R in the figure). The adjacent portions 4-1 and 4-2 hit the inner side 30 a of the projecting portions 30 and 30 and the inner side surfaces 12 b-1 and 12 c-1 of the facing portions 12 b and 12 c of the suspension portion 12 to be separated from each other. The spread of the directions + R and -R is restricted. Specifically, the protrusion 30 is not merely an obstacle in the separating directions + R and −R. For example, when the left protrusion 30-1 in FIG. 2B is pulled in the −R direction, the right facing portion 12 c is also pulled in the −R direction via the extending portion 15. Further, when the right protruding portion 30-2 is pulled in the + R direction, the left facing portion 12b is also pulled in the + R direction via the extending portion 15. In this manner, the protrusions 30 and 30 cancel the force that the opening M side of the suspension part 12 tends to expand toward the separating directions + R and −R.

Such a protrusion 30 preferably has a length L6 shown in FIGS. 5 and 6 larger than the radius r of the adjacent portions 4-1 and 4-2 (see FIG. 2B), but not so much. If it is too long, it will be difficult to wear the fall prevention tool 10. For this reason, the length L6 of the protruding portion 30 is determined in consideration of the shape of the suspension portion 12.
Specifically, as shown in FIG. 6, in the spiral inner space S1, the distal end 30b of the protrusion 30 and the bending farthest from the distal end 30b among the two large bending portions 12e and 12d of the suspension portion 12 are bent. The distance L7 between the inner periphery of the portion 12d is larger than the separation dimension W4. Note that the “inner periphery of the bent portion 12d” means that the upper portion 12a that is in contact with the adjacent portion 4-2 generally when the adjacent portion 4-2 is moved to the inner side of the bent portion 12d as indicated by a broken line in FIG. A range from the position P1 to the position P2 of the facing portion 12b.
The distance L7 of the present embodiment is set slightly larger than the separation dimension W4, and when the adjacent portions 4-1 and 4-2 are disposed between the tip 30b of the protruding portion 30 and the bent portion 12d, the bent portion 12d side is arranged. A gap S3 is provided between the adjacent portion 4-2 and the upper portion 12a.
However, the distance L8 between the tip 30b of the protruding portion 30 and the bent portion 12e closest to the tip 30b among the two large bent portions 12d and 12e in the spiral inner space S1 is formed smaller than the separation dimension W4. ing. Thereby, in order to attach and detach the fall prevention tool 10 to the adjacent portions 4-1 and 4-2, substantially between the tip 30b of the protrusion 30 and the inner periphery of the bent portion 12d farthest from the tip 30b, Only the method of arranging the adjacent portions 4-1 and 4-2 is used.

As shown in FIGS. 9 and 10, the protruding portion 30 and the portion 12 c-1 or 12 b-1 closest to the protruding portion 30 of the suspension portion 12 are substantially parallel. Then, as will be described in the usage method described later, the adjacent portion of the ring 4 is passed between the protruding portion 30 and the suspension portion 12 adjacent thereto, following the interval S2 between the two extending portions 15 and 15. At this time, the substantially parallel portion serves as a guide to facilitate the passage of the ring. 9, the distance between the protrusion 12 and the portion 12c-1 closest to the protrusion 30 of the suspension 12, and the portion 12b of the protrusion 30 and the suspension 12 closest to the protrusion 30 in FIG. The distance from −1 is 45 mm, which is slightly larger than the diameter L4 of the ring 4.
Further, as shown in FIGS. 5 and 6, the protruding portion 30 is a folded shape formed integrally with the extending portion 15, and when the suspension portion 12 is viewed from the front, the tip 30 b of the protruding portion 30 is It arrange | positions outside the inner side surface 12b-1, 12c-1 of the opposing parts 12b and 12c which the suspension part 12 mutually opposes. Specifically, the two protrusions 30 and 30 are gradually separated from each other toward the tip 30b from the root (tip 15a of the extending portion 15), and a required angle with respect to the direction Z along the facing portions 12b and 12c. Tilt with θ. Thereby, even if the fall prevention tool is pushed up due to the vertical shaking of the earthquake, as shown in FIG. 2 (b), the state where the adjacent portions 4-1 and 4-2 are put in the inner space is maintained, and the adjacent portion 4 It is possible to effectively prevent the situation where −1, 4-2 goes out of the protrusion 30. The required angle θ is preferably a large angle if the ring is bent large and a small angle if the ring is small.

[About strength of fall prevention tool]
Next, the strength of the fall prevention tool 10 will be described.
The above-described overturn prevention device 10 is configured to withstand when a force derived from the equation N = α × M / x is applied. N is the force (kgf) applied to the fall prevention device, α is about 15 m / s ² (1515 gal), which is the maximum acceleration of Sendai at the time of the March 11, 2011 East Japan Earthquake, M is mass (kg), x is the height of the container / the height from the bottom surface to the center of gravity position CL.
In the general liquefied gas large portable container (LGC) according to the above-described embodiment, the mass of the liquid gas filled state is about 300 kg, and as shown in FIG. When the center of gravity position CL is assumed to be the center of the gas container 2 and the force Mα applied to the center of gravity and the force N applied to the tipping prevention tool 10 are assumed, the tipping prevention tool at the bottom of the gas container 2 is attached. Considering the moment around the PA point on the opposite side to 10, the height H2 from the bottom surface to the center of gravity position CL and the height from the bottom surface to the upper end (substantially the upper surface of the ring 4) are 1: 2. Therefore, the following relations of Expression 1 and Expression 2 are established.
Mα = 2N (Formula 1)
Mα = 300 [kg] × 15 [m / s ² ] (Formula 2)
For this reason, from Equations 1 and 2, N≈230 [kgf], and in the case of this embodiment, the overturn prevention device 10 can withstand even when a force of about 230 kgf is applied. Specifically, the fall prevention tool 10 is formed of carbon steel having a diameter of 10 mm.

[How to use the fall prevention tool 10]
Next, the usage method of the fall prevention tool 10 of this embodiment is demonstrated.
FIG. 13 is an explanatory diagram of a method of using the tipping prevention tool 10, and FIG. 14 is an explanatory diagram of a method of using the tipping prevention tool 10 following FIG.
In order to connect the two rings with the overturn prevention device 10, first, as shown in FIG. 13A, a plurality of gas containers are brought close to each other so that the plurality of rings 40 and 41 are adjacent to each other. (Of course, they may be in close contact). And the fall prevention tool 10 is laid down along the connection direction X of the two rings 40 and 41, and the adjacent portions 4-1 and 4 adjacent to the rings 40 and 41 with respect to the distance S2 between the extending portions 15 and 15 are shown. -2, one adjacent part 4-1 is inserted.
At this time, the adjacent portion 4-1 passes between the protrusions 30 and 30 and the side portions 12b and 12c of the suspension portion 12 after passing through the interval S2. In this respect, the protrusions 30 and 30 and the portions 12c-1 and 12b-1 closest to the protrusions 30 and 30 of the suspension part 12 are substantially parallel (see FIGS. 9 and 10). If it does so, when passing the adjacent part 4-1, between the protrusion part 30 and the suspension part 12 adjacent to this, a substantially parallel part becomes a guide and it becomes easy to pass the adjacent part 4-1.

Subsequently, as shown in FIG. 13B, the other adjacent portion 4 of the adjacent portions 4-1 and 4-2 adjacent to the rings 40 and 41 with respect to the interval S2 between the extending portions 15 and 15. -2 is inserted.
At this time, the length L5 of the facing portions 12b and 12c is determined by taking into account the position of the valves and instruments of the gas container, the height difference of the rings 4 and 5 shown in the diagram surrounded by the one-dot chain line in FIG. As shown in FIG. 13 (b), when the other adjacent portion 4-2 has passed through the interval S2 between the extending portions 15, 15, one and the other adjacent portions 4 are set. -1 and 4-2 surely enter the inner space S1, and prevent the tipping prevention tool 10 from colliding with the valves and instruments.
Then, the bent portion 12e farthest from the tip 30b among the two large bent portions of the protrusion 30 and the suspension portion 12 in the inner space S1 by rotating the fall prevention tool 10 in the horizontal direction or the like. Adjacent portions 4-1 and 4-2 are arranged between the inner periphery of each. In the present embodiment, the imaginary line KR connecting the tip 30b and the bent portion 12e is aligned with the connecting direction X. If it does so, the protrusion part 30 will be arrange | positioned inside the ring 41 of the other adjacent part 4-2 in planar view. In addition, any one of the two protrusions 30 and 30 may be disposed inside the ring 41.

Next, the projecting portion 30 disposed inside the ring 41 in FIG. 13B is moved so as to pass through the inside of the ring 41 (in the case of the figure, the projecting portion 30 dives inside the ring 41 and moves downward. ), The upper part 12a of the suspension part 12 is moved so as to pass through the inside of the ring 40 (in the case of the figure, it is lifted up), and as shown in FIG.
Then, when the hand is released, the fall prevention tool 10 falls, and as shown in FIG. 14 (d), the suspension part 12 is hung on the adjacent parts 4-1 and 4-2. Connect -1,4-2.

Thus, the fall prevention tool 10 of the present embodiment is laid down and inserted into the adjacent portions 4-1 and 4-2 (FIG. 13A), and the virtual line KR and the connection direction X are substantially aligned (FIG. 13). (B)) The fall prevention tool 10 can be attached to the rings 40 and 41 with few steps of rotating and starting up (FIG. 14C, releasing the hand (FIG. 14D)). In order to remove the fall prevention device 10, the reverse steps to this mounting method are taken, but it is extremely unlikely that the reverse steps will be taken by an earthquake, and the fall prevention device 10 is caused to ring 40, 41 by an earthquake. Will not fall off.
Even if the steps reverse to the above mounting method are not performed, if some force is applied and the distance between the facing portion 12b and the facing portion 12c of the suspension portion 12 is widened, the tipping prevention device 10 falls off the rings 40 and 41. To do. However, near the bent portions 12e and 12d, the two rings 40 and 41 are strong against the forces in the directions + R and -R in which the two rings 40 and 41 are separated from each other. Further, even when the rings 40 and 41 are in a position where the opening M side of the suspension portion 12 is easy to open as shown in FIG. 2B, the direction in which the protruding portions 30 and 30 are separated + R , -R is restricted, so that the opening M can be prevented from opening.
Moreover, the front-end | tip 30b of the protrusion part 30 is arrange | positioned on the outer side rather than the inner side surface of the opposing parts 12b and 12c of the suspension part 12 when seeing the suspension part 12 directly (refer FIG. 5). As a result, even if the fall preventive tool 10 is pushed up by the vertical shaking of the earthquake and the ring relatively approaches the extending portion 15 along the facing portions 12b and 12c of the suspension portion 12, the two in FIG. A situation in which the ring 40 comes out of the protrusion 30 can be prevented like the dotted-line ring 40. Therefore, the ring 40 is prevented from entering between the protruding portion 30 and the facing portion 12b, and the distance S2 between the extending portions 15 and 15 is widened to prevent the possibility of falling.

[Experiment]
The fall prevention tool 10 of the present embodiment is configured as described above, and the following experiment was performed in order to confirm the effect.
A. Conditions of the experiment The above-described fall prevention device 10 is mounted on a plurality of gas container rings and placed on a three-dimensional shaking table, and the vibration of Sendai in the Great East Japan Earthquake of March 11, 2011 is artificially made. Was reproduced. However, in the Great East Japan Earthquake, the first wave and the second wave were combined for about 140 seconds, and it was found that the gas container had not fallen over the first wave.
FIG. 15 is a diagram showing the acceleration of the second wave. In FIG. 15A, the vertical axis indicates the acceleration in the north-south direction, in FIG. 15B, the vertical axis indicates the acceleration in the east-west direction, and in FIG. In each figure, the horizontal direction represents time.
The gas container has a bottom diameter (L1 in FIG. 1) of about 500 mm and a height of about 1500 mm, and the above-described ring is fixed to the upper part. A gas container of about 300 kg filled with water was used.

B. Experimental Results FIG. 16 shows the experimental results.
As shown in this figure, an experiment in which three gas containers are placed adjacent to each other so as to fit in a triangle and all adjacent rings are connected (1). In the experiment (2) in which all the adjacent rings are connected to each other so as to fit in each other, a total of 16 gas containers are arranged in a grid pattern in each of 4 vertical and 4 horizontal lines, In the experiment (3) in which all the rings were continuously connected along the outer peripheral direction and twelve gas containers were connected in a ring shape, no fall of the gas container was observed.
From these experimental results, for a liquefied gas container whose height relative to the diameter of the bottom surface is about three times or less, three or more units are connected and fixed (Experiment (1)), and fixed by annular connection (Experiment (2) and (3) ) Was found to be effective as a fall prevention measure.
Prior to this experiment, the applicant made a fall prevention device only for the suspension part 12 without the extending part 15 and the protrusion part 30 in FIG. 2 (the opening M of the suspension part 12 was slightly narrowed compared to FIG. 2). Using this, the same experiment as the above experiment was conducted, but the gas container fell over in all experiments. As a result of investigating the cause of the overturn, it was found that the opening M side of the suspension part 12 (that is, the mounting opening) was expanded and the overturn prevention tool was dropped. However, in the fall prevention tool 10 of FIGS. 3 to 12, the spread of the suspension part 12 on the opening M side is restricted, and the fall prevention tool is not dropped due to the protrusion 30 catching on the adjacent part 4. Also from such a thing, the superiority of the fall prevention tool 10 of this embodiment is understood.

The embodiments of the present invention are configured as described above, and various technically preferable limitations are given. However, the scope of the present invention is not limited to the above-described embodiments unless otherwise specified. It is not limited to the embodiment.
For example, the fall prevention tool 35,36,37,38,39 which concerns on the modification of FIGS. Hereinafter, the fall prevention tools 35, 36, 37, 38, and 39 of FIGS. 17 to 22 will be described.
FIG. 17 is a perspective view of a tipping prevention device 35 according to a first modification of the embodiment of the present invention.
In the fall prevention tool 35 in this figure, a handle 40 is provided on the upper portion 12 a of the suspension portion 12. The handle 40 is cylindrical and preferably has cushioning properties.

FIG. 18 is a perspective view of a tipping prevention tool 36 according to a second modification of the embodiment of the present invention.
The fall prevention tool 36 in this figure has a small ring-shaped portion 42 outside the suspension portion 12. The ring-shaped portion 42 has a through hole 43 through which a string, a wire, or the like can pass, and can thereby be connected to a gas container via the string, a wire, or the like. Therefore, the overturn prevention tool 36 can be managed integrally with the gas container. In particular, when a plurality of types of fall prevention tools 36 are used corresponding to a plurality of types of gas containers, they can be managed by being connected to the corresponding gas containers. In addition, as for the fall prevention tool 36 of FIG. 18, the ring-shaped part 42 is arrange | positioned on the outer side of the bending part 12e.

FIG. 19 is a front view of a tipping prevention device 37 according to a third modification of the embodiment of the present invention. In FIG. 19, the convex portions 20 of FIG. 4 and the like are omitted.
In the overturn prevention tool 37 in this figure, the protrusions 30-1 and 30-1 are curved corresponding to the outer peripheral surfaces of the adjacent portions 4-1 and 4-2 of the ring. The distance between the tip 30-1a of the protrusion 30-1 and the tip 30-1b of the protrusion 30-1 is formed to be at least larger than the separation dimension W2. For this reason, even if the fall prevention tool 37 is pushed up by an earthquake and the adjacent portions 4-1 and 4-2 come to the extending portion 15 side and try to move in the directions + R and -R away from each other, the protruding portion 30-1 30-1 and the adjacent portions 4-1 and 4-2 are securely locked.
As shown in this figure, the opposing portions 12ba and 12ca of the suspension portion 12 may bulge outward and round, but may be linear as shown in FIG.

FIG. 20 is a front view of a tipping preventer 38 according to a fourth modification of the embodiment of the present invention.
As shown in this figure, the protrusions 30-2 and 30-2 do not have to have the shape in which the extending portion 15 is folded back as shown in FIGS. You may make it connect to a front-end | tip.
Further, as shown in this figure, the protrusions 30-2 and 30-2 do not have to be completely along the spiral direction, and are substantially along the entire surface including the curve as shown in FIG. It only has to be. That is, “substantially along the spiral direction”, which is a necessary structure for the protrusion 30 in FIGS. 3 to 10, the protrusion 30-1 in FIG. 19, and the protrusion 30-2 in FIG. When 4-1 and 4-2 are on the extending portion 15 side and are about to be separated from each other, the protruding portions 30, 30-1 and 30-2 and the adjacent portions 4-1 and 4-2 can be locked. Means that.

21 and 22 show a tipping prevention tool 39 according to a fifth modification of the embodiment of the present invention. FIG. 21 is a front view thereof, and FIG. 22 is a right side view thereof.
As shown in this figure, leg portions 45 extending further from the tips 30b, 30b of the protruding portions 30, 30 may be formed. The leg 45 is bent so as to be inverted from the tip 30 b of the protrusion 30, extends downward in the figure, and extends to the outer side 15 b of the extending portion 15. Thereby, the fall prevention tool 39 can be stably placed on the floor and can be easily lifted as compared with the case where it is laid on the floor. In addition, it is preferable that the leg part 45 bends as soon as possible from the front-end | tip 30a so that it may not become obstructive at the time of mounting | wearing with the fall prevention tool 39. FIG.

DESCRIPTION OF SYMBOLS 10 ... Fall prevention tool, 4 ... Ring, 4-1, 4-2 ... Adjacent part, 12 ... Suspension part, 12d, 12e ... Bending part, 15 ... Extension part, 30 ... Projection, W2, W4 ... Spacing dimensions

Claims (4)

Ring having a diameter equal to the diameter of the cylindrical body portion to the upper portion of the gas container is fixed, by connecting to what the ring of the plurality of the gas container, in fall prevention device for preventing a fall of the gas container There,
A substantially U-shaped or substantially U-shaped suspension part that is hung on the adjacent part with each adjacent part of the ring of the gas container adjacent to each other inside, from both ends of the suspension part, The two extending portions approximately spaced apart from each other, including the thickness of each of the adjacent portions, are generally spiral,
An overturn prevention tool, wherein at each end of the two extending portions, a protruding portion that protrudes substantially along the spiral direction of the spiral is provided.   The distance between the two extending portions is larger than the thickness of any of the adjacent portions, and is smaller than the separation dimension when the adjacent portions are at the same height. The fall prevention tool according to claim 1, characterized in that it is dimensioned. The suspension portion has the substantially U-shape having two large bent portions,
In the spiral inner space, the distance between the tip of the protruding portion and the inner periphery of the bent portion farthest from the tip among the two large bent portions is larger than the separation dimension,
And,
The distance between the tip of the protrusion and the bent portion closest to the tip of the two large bent portions in the spiral inner space is smaller than the separation dimension. The fall prevention tool according to 1 or 2. The overturn prevention tool according to any one of claims 1 to 3, wherein the protrusion and the portion of the suspension that is closest to the protrusion are substantially parallel.

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