JPS60558Y2 - Band for preventing fall of heavy objects placed vertically - Google Patents

Description

[Detailed description of the invention] This invention is used to protect items that are customarily placed upright or leaning on the ground, such as gas cylinders, long iron materials, or long pieces of wood, from falling over due to shocks such as earthquakes. Regarding the protective band.

Long, heavy items such as gas cylinders, long pieces of wood, small steel poles, reinforcing bars, or shaped steel are placed upright or against a wall, etc., for convenience in handling or transportation, or to save space. However, since they are often unstable, if a strong earthquake were to occur, there is a risk that they would suddenly collapse, seriously injuring people nearby, or cutting off power lines.

In general, if a high-pressure gas cylinder such as a propane cylinder, acetylene cylinder, oxygen cylinder, or hydrogen cylinder is accidentally knocked over, the connecting hose may be disconnected or cut, causing the gas inside to leak, resulting in a fire, explosion, or gas poisoning. It is extremely dangerous as it is scary.

Furthermore, since the gas contained in chlorine and phosgene cylinders is dangerous and poisonous, leakage can cause great damage to local residents.

Therefore, although these gas cylinders are required by law to be fixed to walls etc. using chains, in the event of a strong earthquake, the tethering hooks may fall off the wall and become useless. many.

In fact, even during the relatively recent Sendai earthquake, many cylinders fell over and caused a great deal of damage, even though it was a strong earthquake.

According to research and experiments conducted by the Tokyo Metropolitan Fire Department and the High Pressure Gas Safety Association, this is because the metal chain itself lacks a cushioning effect, causing the mounting hook to fall off the wall due to the vibrations caused by the earthquake. There is.

Incidentally, it was conventionally thought that it was sufficient to use a hook with a diameter of 3.2rrL1m, but according to experiments by the High Pressure Gas Safety Association, as the amount of gas in the gas content decreased, the vibrations increased, and due to the resonance effect, 3. An unexpected fact has been revealed that even a hook with a diameter of 2m1m can easily be pulled off.

This is because the chain itself has no buffering force, and since the chain has no elasticity at all, it is impossible to make it come into close contact with the outer wall of the cylinder.
It is assumed that the main reason is that the vibrations (oscillations) can only be suppressed insufficiently.

From the above, if the locking band itself is made of a cushioning material and the band is kept in close contact with the outer wall of the cylinder at all times, there will be no possibility of the wall surface and the cylinder vibrating in opposite directions. Even if it occurs, the traction force will be absorbed by the band itself, and there is no risk of excessive traction force acting on the wall surface, that is, on the anchoring hook part. Therefore, unless the worst situation such as the wall surface itself collapses occurs, the cylinder will not be able to hold the cylinder. It is assumed that falls can be prevented.

The present invention is based on the above recognition, and its essence is to skillfully combine the cushioning effect of the rubber elastic body and the tensile strength of fibers to have sufficient tensile strength and a strong cushioning effect. It's about trying to embody the band.

The above concept is materialized by the following configuration.

(a) Strong tensile strip: This member is required to have sufficient tensile strength because it supports the impact force generated when a cylinder or the like falls.

Woven fabrics made from synthetic fibers such as polyamide, aromatic polyamide, and polyester, natural fibers such as cotton and hemp, or mineral fibers such as glass fiber, quartz fiber, carbon fiber, and other mineral fibers, especially tape-woven fabrics, generally have high tensile strength. Since it has a low elongation rate, it can be used as it is as the main member.

In addition to the above-mentioned fibers, monofilaments, strands, or yarns of various linear bodies including steel wires may be arranged in parallel in the longitudinal direction and embedded in an elastic carrier such as elastic rubber or similar material. It is effective for the purpose because it has less elongation than the former.

As the material for the linear body, those having a high Young's modulus such as steel wire, polyamide liquid crystal fiber, and carbon fiber are particularly preferred.

Note that even when a woven fabric is used as a tensile strength member, it is appropriate to wrap it in a protective material such as elastic rubber.

(b) Stretchable portion in the tensile strip: Although the strip in a above itself has strong tensile strength, it cannot have elasticity.

However, in order to absorb the vibrations that occur during turbulent movements such as a waist earthquake and prevent excessive traction on the attachment part, the strip itself must have extensibility.

In order to solve this paradox, the present invention provides a part of the tensile strip with an extensible section that crosses it in the width direction.

Although there may be a plurality of extensible portions, it is generally sufficient to have one extensible portion in the center of the fibrous strip.

The structure of the extensible portion in the tensile strip can take various configurations depending on the structure of the strip, but the most common is to give the section a wave-like bend.

Another method is to give the high tensile strength fibers embedded in the carrier, which is a wooden part, a wavy, helical, etc. bend.

When the fibers are bent in a wavy manner, the bending surface of the fibers may be along a vertical plane that cuts the strip along the longitudinal direction, or may be along the surface of the strip.

The former method of bending the strip itself is when a woven fabric is used as the strip, and when a filament of high tensile strength fiber,
It can also be applied to any case where the strand or yarn is encapsulated in a carrier such as elastic rubber.

The method of using high tensile strength fibers bent in an anti-waisted or helical shape can only be used when the fibers are encapsulated in a carrier such as elastic rubber.

Still another method is to use a knitted material such as stockinette knitting, which can be used both when using a woven fabric alone as a tensile strip and from high tensile strength fibers and a carrier such as elastic rubber. It can be applied to any case where a high print structure is adopted.

In addition, if a wavy structure is given to a tensile strip made of woven fabric alone as an extensible part, it will have almost no extensibility, except when special fibers such as urethane fibers are used. It has no shrinkage.

As will be readily appreciated, if in the unstretched state, the extensible portion is slack relative to the elastic strip, the tensile force of the elastic strip will pull it back to the unstretched state.

(C) Elastic strip: The above-mentioned tensile strip has an intermediate wavy shape (
Although the sagging or braided structure provides stretchability in the longitudinal direction, the shrinkability is clearly lacking (especially when woven fabric alone is used as the tensile strip).

However, since the vibrations caused by an earthquake usually occur many times, a stretched part cannot cope with subsequent vibrations.

Therefore, the proposed band utilizes the elasticity of the elastic strip in order to provide contractibility to the upper extensible portion.

For this purpose, the elastic strip is attached to the back and/or front surface of the tensile strip integrally with the latter, but only the stretchable part is separated from the latter.

With this configuration, in the non-extensible part, the elastic band is integrated with the tensile band to protect the back and/or surface thereof, and in the extensible part, it promotes contraction of the part and protects the tensile band. Even when a part is stretched, it generates tensile force based on elasticity, so
Prevent rapid stretching of the part.

That is, the tensile strength of the rubber elastic body is initially small and then increases rapidly, so that the acceleration caused by the rocking of the cylinder or the like is absorbed.

Furthermore, since the extensible portion prevents the elastic band from being overstretched after it has been stretched to a certain limit, there is no risk of the elastic band tearing due to excessive stretching.

(Thus, under these extreme conditions, the tensile strip provides a protective effect over the elastic strip.

) The elastic strip is provided on one or both sides of the tensile strip as required.

The rubber elastic material constituting this strip is preferably a rubber elastic material, particularly one that is rich in aging resistance, weather resistance (ozone resistance and light resistance), tear resistance, and cold resistance (for cold regions).

Existing suitable materials include, for example, chloroprene rubber,
Examples include ethylon propylene rubber, chlorosulfonated polyethylene rubber, urethane rubber, but are not limited to these.

The proposed band usually has a fixing member such as a stirrup or hook attached to both ends, but if necessary, a fixing member such as a stirrup or hook
Length adjustment means such as pins can be added.

As detailed above, the present invention solves the problem of imparting extensibility to a material with strong tensile strength by providing an extensible portion in a tensile strip that is itself non-extensible. , the non-contractability, which is considered to be a drawback of the extensible part, is compensated for by the elasticity of the elastic band, so that when the attachment is caused by the violent movement of a heavy object, the traction force on the member is compensated for by the expansion and contraction of the extensible part. This can be called a good example of a problem solved by using a composite material.

A specific example of the invention will be explained below with reference to the drawings, but of course,
This is an example and does not limit the scope of the invention.

Figures 1 and 2 show an example of the proposed band.

In the drawings, the band 1 of this example includes a tensile band ± in which polyamide cords 3, 3, . It is made of an elastic rubber strip 5 which is integrally attached to the back side of the main strip, and locking fittings 6, 6' are attached to both ends.

The tensile strip 4 has several widthwise wavy portions 4 in its center.
a, and the cord 3°3... in this part has a curve 3a similar to the waveform part of the rubber elastic band 2 as shown in FIG.
, 3a...do.

In the main wavy portion 4a, the rubber elastic band 5 and the tensile band ± are not bonded to each other.

Therefore, when a tensile force is applied in the direction of the arrow in FIG. It exhibits strong tensile strength along with the inside of the tensile strip.

After the tensile force is further increased and the wavy portion 4a is fully extended,
The cords 3, 3, . . . resist tension and protect the rubber elastic strips 5a on the wavy lower surface.

When the tensile force is exhausted, the rubber elastic band 5a returns to its original state due to the contraction force of the rubber elastic band 5a.

During this stretching, the stretched rubber strip 5a is
Once the degree of elongation exceeds a threshold value, a logarithmically strong contraction force is generated, and the acceleration of the article that is about to fall is absorbed by the deformation energy.

Therefore, the traction force applied to the mounting portion as a reaction force to acceleration is significantly reduced.

Therefore, when the present band is used to prevent a long heavy object B such as a cylinder from falling over as shown in FIG. 3, it is extremely effective against violent movements such as earthquakes and prevents the object from falling over.

Furthermore, since the band of this example has stretchability in the longitudinal direction, it can reliably adhere to the outer surface of objects of slightly different sizes and shapes. There is no need to change the balance.

FIG. 4 shows an example in which a rubber elastic strip 5 is integrally attached to the back side of a tensile strip 4 made of a tape-woven polyamide fabric.

In this example, eyelets 7, 7, . . . are provided along the center line of the band 1, and the length of the band can be adjusted by hooking them onto a hook on the mounting member side.

FIG. 5 shows an example in which another rubber elastic strip 5' is attached to the surface of the tensile strip 4 shown in FIGS. 1 and 2.

In this example, both sides of the strip 4 are protected by rubber strips, so it is strong and has a strong shrinkage force.

FIG. 6 shows a cord 3°3... which is embedded in the elastic rubber strip 2 as an extensible portion of the tensile strip, along with a wavy portion 3a along a plane perpendicular to the longitudinal direction of the band. 3a...
・An example is shown below.

Wavy portion 3a. The cords 3a... stretch as the rubber elastic band on the back side stretches, but when fully stretched, they begin to exhibit tensile strength.

It is desirable that the cords forming the wavy portions 3a, 3a, . . . do not come into close contact with the rubber strip forming the carrier.

In this example as well, eyelets 7, 7, etc. are provided as in FIG. 4, and bolts and nuts 8, 8' are inserted between the opposing eyelets.
The overall length of the band can be adjusted by fixing it using the .

FIG. 7 shows an example in which the wavy portions 3a, 3a, . . . in FIG. 6 are arranged parallel to the surface of the supporting rubber strip 2.

In this example, since the waveform of the wavy portion is parallel to the surface of the carrier, the thickness of the strip 2 can be made sufficiently thin and is not affected by the amplitude of the waves.

FIG. 8 shows that a stockinette knitted elastic band 5'' is sewn to the center of tape-woven fabrics 4', 4', and on both sides of the entire band except for the elastic band part. Elastic rubber strip 5,
This is an example in which 5' is attached.

Also in this example, it is preferable that the supporting rubber does not penetrate into the tissue of the elastic portion.

As described in detail above, the present invention provides an effective means for preventing long heavy objects such as cylinders from falling over due to shocks such as earthquakes, and is of great value in terms of disaster prevention.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a fall prevention band embodying the present invention, Figure 2 is a vertical sectional view taken along the longitudinal direction of the band in Figure 1, and Figure 3 is how the band in the previous two figures is used. FIG. 4 to FIG. 6 are sectional views similar to FIG. 2 showing different examples of the band of the present invention, FIG. The figure is a vertical sectional view of the main part showing yet another example of the invention. The meanings of the symbols in each figure are as follows: 1: Main band;
2: Supporting strip, 3: Reinforcing cord, 3a: Wavy portion of 3, 4: Tensile strip, 4a: Wavy portion of 4, 4': Tape woven fabric, 5, 5': Elastic band Piece, 5″: elastic strip,
6.6': Locking metal fittings, 7: Eyelets, 8, 8': Bolts and nuts, B: Cylinder

Claims (6)

[Scope of utility model registration request] (1) a tensile strip at least partially configured to be stretchable, excluding the stretchable portion of the tensile strip;
A band for preventing overturning of heavy objects placed vertically, comprising a rubber elastic band integrally polymerized with the band. (2) The band according to claim (1), wherein the stretchable portion of the tensile band has a wavy shape parallel to the width direction of the band. (3) The band according to registered claim (1), wherein the tensile band is made of a braided material. (4) Claim (1) wherein the tensile strip is a linear monofilament, strand or yarn with high tensile strength embedded along its longitudinal direction in the strip of an elastic carrier. The band described in any of paragraphs (3) to . (5) The registered claim No.
2) The band described in section 2). (6) The band according to claim (1), wherein the band is provided with means for securing both ends of the band to another object.