JP4617071B2 - Anti-vibration material for cargo - Google Patents

Description

  The present invention relates to a vibration isolator for cargo provided to support cargo.

  Techniques have been proposed for utilizing rubber chips collected from waste tires and the like for various purposes.

  Patent Document 1 discloses a porous elastic material having a void ratio with a large equivalent damping coefficient, which is formed by molding rubber powder or elbow-shaped rubber chips made of vulcanized rubber or waste tires of industrial rubber products with material rubber. A rubber molded body with a vertical spring constant of 0.5 kN / mm to 50 kN / mm and a thickness of 5 mm to 100 mm. It is a base for vibration sources such as machines or non-vibration sources such as buildings (houses, etc.) As a vibration source or a non-vibration source, it is provided on the bottom or leg of the housing to prevent vibrations. Furthermore, the shear spring constant is large, the pressure receiving area and the spring constant are in a proportional relationship, and vibration isolation in the low frequency region What is excellent in effect is disclosed. And according to this, it is described that the vibration transmissibility in a low frequency region of 50 Hz or less, which has been difficult to remove with the anti-vibration rubber, can be designed to be sufficiently 1 or less.

  Patent Document 2 discloses a rubber elastic pavement obtained by mixing and molding a vulcanized rubber elastic aggregate and a binder, and hydrolyzing alkoxysilane on the surface layer of the rubber elastic aggregate. The thing in which the organic compound of the silica which is a polycondensate of a thing and a silica is formed is disclosed. And according to this, since the silica or the organic compound of silica, which is a polycondensate of the hydrolyzate of alkoxysilane, is formed on the surface layer of the rubber elastic aggregate, the strength of the rubber elastic aggregate and Since the rigidity is increased and the strength and rigidity of the rubber elastic aggregate are high, the paving material using the rubber aggregate can be provided with higher strength and rigidity without changing the porosity. By adhering rubber elastic pavement to the roadbed to form a pavement on an automobile road, it has good sound absorption and water permeability, improved elasticity and improved adhesion to the roadbed, and deflection It is described that the blowing of water at the time is also suppressed and the hydroplaning phenomenon of the vehicle can be suppressed.

  Patent Document 3 discloses a pavement material that is laid on a roadbed of a road to form an elastic pavement, in which at least two types of regions having different surface hardness are mixed. And according to this, since the hardness of the pavement material differs depending on the part touched by the wheel, the road surface is uneven due to the passage of the wheel, and the wheel is caught by this road surface unevenness, and therefore the sliding friction coefficient of the road surface The squeeze effect that pushes the moisture contained in the pavement toward the roadbed (extrusion effect) is obtained by the wheel being caught by the surface irregularities, and the moisture contained in the pavement It is described that it is possible to prevent the moisture contained in the pavement from being raised on the road surface by extruding to the roadbed side.

In Patent Document 4, a composition in which ceramic fine hollow particles having a water pressure resistance of 600 kgf / cm ² or more and a melting point of 1500 ° C. or more and a waste tire chip are pressure-molded into a sheet to form a core material. A lightweight elastic vibration-absorbing floor material in which a waterproof material is applied to the front surface or the front and back surfaces is disclosed. And according to this, it is described that a lightweight elastic vibration-absorbing flooring material that can be easily formed into an arbitrary shape and size, is light in weight, saves resources, saves energy, is easy to construct, is water-resistant, and has weather resistance is provided. ing.

Patent Document 5 discloses a plastic or metal surface plate in which an engaging concave groove that engages with a fixture of an outdoor unit of an air conditioner is formed on an upper surface, and a block-shaped mounting base coupled to the inner surface of the surface plate. An outdoor unit mounting base for an air conditioner is disclosed, which includes a main body and the mounting base body is formed by bonding rubber chips with a binder. And according to this, it is described that it has a high anti-vibration effect and can also be manufactured from waste rubber products.
JP 2003-14045 A Japanese Patent No. 3061032 JP 2001-115408 A JP 2000-282667 A Japanese Utility Model Publication No. 6-63996

  By the way, precision instruments such as semiconductor-related inspection devices are extremely vulnerable to vibration, and therefore, air suspension vehicles are usually used for transportation over the land.

  However, there are cases where the above precision equipment is exported to countries where air suspension vehicles are not widely used, and in such cases, transportation over the land is extremely difficult. It may be necessary to attach anti-vibration devices to cargo packed with precision equipment and export it, but the cost of transportation increases due to expensive anti-vibration devices, and even if the anti-vibration devices are recovered and reused Costs money.

  The present invention has been made in view of such points, and an object of the present invention is to provide an inexpensive anti-vibration material for cargo that can prevent vibration imparted to the cargo during the transportation of the cargo. .

The present invention for achieving the above object is a vibration isolator for cargo provided to support cargo,
The anti-vibration material body is formed by a rubber chip block formed by combining rubber chips with a binder .
The vibration isolator body has a mounting hole for mounting a cargo on the upper surface, and a hole periphery reinforcing means is provided around the mounting hole.
The hole periphery reinforcing means is that the peripheral portion of the fixture insertion hole is formed at a higher density than other portions.

  According to said structure, the vibration-proof material main body is formed with the rubber chip block formed by couple | bonding a rubber chip with a binder. Therefore, by attaching this to the bottom of the cargo, vibrations imparted to the cargo during transportation of the cargo can be prevented. Moreover, since the vibration isolator body is formed of a rubber chip block, it is inexpensive.

In addition, the greatest force acts on the peripheral portion of the fixture insertion hole, which is the attachment portion of the fixture that is a rigid body. However, according to the above configuration, the portion can be reinforced.

  In the present invention, a hollow portion opened in the bottom surface of the vibration isolator main body may be formed.

  According to the above configuration, although the anti-vibration material body is formed by the rubber chip block, since the hollow portion opened at the bottom is formed, the natural frequency suitable for absorbing vibration during cargo transportation Low vibration isolation performance can be exhibited.

  In the present invention, it is desirable that the natural frequency of the vibration isolator body is 10 Hz or less.

  According to said structure, especially in trucking, the outstanding vibration-proof performance can be exhibited. More preferably, it is 5 Hz or less or 4 Hz or less.

  This invention may have a cover member provided so that the upper part of the said vibration-insulation material main body may be covered.

  According to the above configuration, even if the vibration isolator body is compressed by the weight of the cargo, it is possible to suppress lateral expansion and buckling of the vibration isolator body, thereby maintaining the vibration isolation performance. You can plan.

  In the present invention, the vibration isolator main body may have a bottom reinforcing means on the bottom surface.

  Since the cargo moves in the warehouse by a forklift or the like or is loaded on a truck, the bottom portion of the anti-vibration material for cargo attached to the cargo is easily damaged by rubbing against the ground. However, according to said structure, this damage can be suppressed.

  As a specific configuration of the bottom reinforcing means, a bottom reinforcing material such as a resin plate, a resin coating, a metal plate, or the like provided on the bottom surface or a bottom portion may be formed with a higher density than other portions. .

  In the present invention, it is desirable that the rubber chip is collected from a used rubber product.

  According to said structure, while being able to hold down the raw material cost of a vibration-proof material main body very low, recycling of a rubber raw material can be aimed at.

  As described above, according to the present invention, the anti-vibration material body is formed by the rubber chip block formed by bonding the rubber chips with the binder. By attaching this to the bottom of the cargo, the cargo is transported when the cargo is transported. Can be prevented, and is inexpensive.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 (a) and 1 (b) and FIG. 2 show a cargo vibration isolator 100 according to an embodiment of the present invention.

  This anti-vibration material 100 for cargo consists of the anti-vibration material main body 110 and the cover member 120 which covers the upper part.

  The anti-vibration material body 110 is composed of a rubber chip block formed by connecting rubber chips with a binder. The vibration isolator main body 110 has a cubic outer shape with a side of about 10 cm, a cylindrical hole-shaped hollow portion 111 having a diameter of 5 cm opened at the bottom surface, and an attachment for cargo attachment at the center of the top surface. A tool insertion hole 112 is formed. The fixture insertion hole 112 communicates with the hollow portion 111.

  As described above, the vibration-proof material body 110 has a natural frequency of 10 Hz or less because the hollow chip 111 is formed in the rubber chip block.

  The rubber chip is obtained by processing a lump of vulcanized rubber into a granular shape or a pickled shape. By collecting from used rubber products such as waste tires, the rubber material can be recycled. The type of rubber is not particularly limited, but natural rubber having high vibration-proof performance is suitable.

  The binder is a urethane-based or epoxy-based thermosetting resin.

  The fixture insertion hole peripheral portion 110a is formed with a higher density than the other portions (hole peripheral reinforcing means) and is reinforced thereby.

  The bottom portion 110b of the vibration isolator body 110 is formed with a higher density than the other portions (bottom reinforcing means) and is reinforced thereby.

  The above vibration isolator body 110 can be produced by filling a mold with a mixture of rubber chips and a binder, and heating and pressurizing the mixture. With respect to the high-density fitting insertion hole peripheral portion 110a and the bottom portion 110b, a rubber chip having a relatively small particle diameter is filled in a portion where the portion of the mold is formed, or a rubber chip is filled in the portion of the mold. And can be formed by pre-compression.

  The cover member 120 is formed in a slightly larger rectangular cup shape so as to cover the upper part of the vibration isolator main body 110, and a fixture insertion hole 121 coaxial with the fixture insertion hole 112 of the vibration isolator main body 110 is formed at the center. Is formed. Such a cover member 120 can be produced by press molding a metal plate such as an aluminum plate or resin molding.

  As shown in FIGS. 3A and 3B, the above-described anti-vibration material 100 for cargo is provided at 6 to 9 locations including the bottom four corners of the cargo 200 and supports the cargo 200. For example, when the bottom plate of the cargo 200 is made of wood, each cargo anti-vibration material 100 has a screw portion of a wood screw 300 to which a washer 400 is attached as shown in FIG. From the inside, the vibration isolator body 110 and the cover member 120 are inserted into the fixture insertion holes 112 and 121, and the screw heads are engaged with the peripheral portions of the fixture insertion holes. The screw portion of the wood screw 300 is the bottom plate of the cargo 200. It is screwed into and attached.

  According to the cargo vibration-proof material 100 described above, the vibration-proof material main body 110 is formed by the rubber chip block formed by connecting rubber chips with a binder, and the hollow portion 111 opened on the bottom surface of the vibration-proof material main body 110 is formed. Since it is formed and has a natural frequency of 10 Hz or less, by attaching it to the bottom of the cargo 200, vibrations applied to the cargo 200 can be extremely effectively prevented during transportation of the cargo 200, particularly in truck transportation. be able to.

  Further, since the rubber chip is collected from the used rubber product, the cost of the vibration isolator main body 110 can be kept extremely low, and the rubber material can be recycled.

  Further, even if the vibration isolator body 110 is compressed by the weight of the cargo 200, the cover member 120 suppresses lateral expansion and buckling of the vibration isolator body 110, thereby maintaining the vibration isolating performance. Can be achieved.

  In addition, the greatest force acts on the fitting insertion hole peripheral portion 110a that is the attachment portion of the wood screw 300, which is a rigid body, but the fitting insertion hole peripheral portion 110a is formed at a higher density than the other portions. Since it is reinforced, excellent durability can be obtained.

Further, since the cargo 200 is moved in the warehouse by a forklift or the like or loaded on a truck, the bottom portion 110b of the cargo vibration isolator 100 is easily damaged by rubbing against the ground. Since it is formed and reinforced at a higher density than the other parts, damage to the bottom part 110b of the anti-vibration material 100 for cargo can be suppressed.
-Other embodiments-
In the above embodiment, the fixture insertion hole peripheral portion 110a is formed with a high density. However, the present invention is not particularly limited to this, and the fixture insertion hole peripheral portion 110a has a higher hardness than other portions. Alternatively, as shown in FIG. 5, a hole peripheral reinforcing material (hole peripheral reinforcing means) 130 such as a steel plate, a resin plate, or a resin coating for reinforcing the fixture insertion hole peripheral portion 110 a may be provided.

  Moreover, in the said embodiment, although the bottom part 110b shall be formed in high density, it is not specifically limited to this, The bottom part 110b is made harder than another part, or it shows in FIG. Thus, it is good also as what provided the bottom reinforcements (bottom reinforcement means) 140, such as a steel plate, a resin board, and a resin film, in the fixture insertion hole peripheral part 110a.

  In the above embodiment, the cover member 120 is provided. However, the cover member 120 is not particularly limited thereto, and the cover member 120 may be configured only by the vibration-proof member main body 120.

  In addition, the said vibration-proof material 100 for cargoes can use the thing of the shape which formed the vibration-proof material main body 110 in the half of the cube, for example as a cushion material provided in the inside of the cargo 200. FIG.

(Test evaluation 1)
Static vibration characteristics in the longitudinal direction of the anti-vibration material for cargo having the same structure as that of the above-described embodiment in which the main body of the anti-vibration material is formed of a natural rubber pickle-like rubber chip and a cubic foam block having a side of 100 mm. The test to get was done.

  FIG. 6 shows the static spring characteristics of the anti-vibration material for cargo and FIG. 7 shows the static spring characteristics of the foamed polystyrene block.

  According to FIGS. 6 and 7, the portion having a substantially linear relationship in the foamed polystyrene block has a load of 600 N and a deformation amount of up to 3 mm, while the vibration isolator for cargo has a load of 3400 N and a deformation amount of up to 29 mm. That is, it can be seen that the anti-vibration material for cargo has a wider linear region of static spring characteristics than the foamed polystyrene block, and therefore exhibits anti-vibration performance even when large deformation occurs due to high weight loading.

(Test evaluation 2)
The anti-vibration material for cargo of the same structure as the said embodiment in which the anti-vibration material main body was formed with the elbow-like rubber chip | tip of natural rubber was prepared.

  Place the four pallet anti-vibration materials attached to the four corners of the pallet loaded with 550kg and the pallet loaded with the 550kg load without the anti-vibration material mounted on the pallet. It was.

  Plates having a length of 1000 mm, a width of 100 mm and a thickness of 30 mm were placed at several locations on the track runway, and the truck was run while stepping on the plates.

  The vibrations that occur when the truck climbs over the board were observed for each of those equipped with a vibration isolator for cargo and those without a vibration isolator for cargo.

  FIG. 8 shows the relationship between elapsed time and impact acceleration. Here, (a) shows the impact acceleration of a perpendicular direction about the thing which has not attached the vibration isolator for cargoes. (B) shows the impact acceleration of a perpendicular direction about what attached the vibration isolator for cargoes. (C) shows the impact acceleration in the track traveling direction. (D) shows the impact acceleration in the direction perpendicular to the track traveling direction.

  According to FIG. 8, when the anti-vibration material for cargo is not attached, vibration that causes a maximum impact acceleration of 10 G is given to the cargo. However, when the anti-vibration material for cargo is attached, it is 1 It turns out that it is suppressed by about ~ 2G. That is, extremely high vibration isolation performance can be obtained.

  As described above, the present invention is useful for the anti-vibration material for cargo provided to support the cargo.

It is a perspective view of the vibration isolator for cargo concerning the embodiment of the present invention. It is a longitudinal cross-sectional view of the vibration isolator for cargo which concerns on embodiment of this invention. It is a perspective view which shows the cargo in which the vibration isolator for cargo was attached. It is explanatory drawing which shows the attachment state to the cargo of the vibration isolator for cargo. It is a longitudinal cross-sectional view of the vibration isolator for cargo which concerns on other embodiment. It is a graph which shows the static spring characteristic of the vibration isolator for cargoes. It is a graph which shows the static spring characteristic of a polystyrene foam block. It is a graph which shows the relationship between elapsed time and impact acceleration.

Explanation of symbols

100 Anti-vibration material for cargo 110 Anti-vibration material main body 110a Peripheral part for fitting insertion hole 110b Bottom part 111 Hollow part 112, 121 Insertion hole for fitting 120 Cover member 130 Peripheral part reinforcing material 140 Bottom reinforcing material 200 Cargo 300 Wood screw 400 Washer

Claims (8)

Anti-vibration material for cargo provided to support cargo,
The anti-vibration material body is formed by a rubber chip block formed by combining rubber chips with a binder .
The vibration isolator body has a mounting hole for mounting a cargo on the upper surface, and a hole periphery reinforcing means is provided around the mounting hole.
The said hole periphery reinforcement means is the vibration isolator for cargos that the said fixture penetration hole periphery part is formed more densely than another part . The anti-vibration material for cargo according to claim 1,
The anti-vibration material body is a cargo anti-vibration material in which a hollow portion opened in a bottom surface is formed. The anti-vibration material for cargo according to claim 1,
The anti-vibration material main body is a vibration-proof material for cargo having a natural frequency of 10 Hz or less. The anti-vibration material for cargo according to claim 1,
A cargo vibration isolator having a cover member provided to cover an upper portion of the vibration isolator main body. The anti-vibration material for cargo according to claim 1,
The anti-vibration material body is a cargo anti-vibration material having a bottom reinforcing means on the bottom surface. The anti-vibration material for cargo according to claim 5 ,
The bottom reinforcing means is a vibration-proof material for cargo, which is a bottom reinforcing material provided on the bottom surface. The anti-vibration material for cargo according to claim 5 ,
The bottom reinforcing means is an anti-vibration material for cargo, wherein the bottom portion is formed with a higher density than other portions. The anti-vibration material for cargo according to claim 1,
The rubber chips are anti-vibration materials for cargo that are collected from used rubber products.

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