JPH0864383A - Caster for carriage - Google Patents

Abstract

PURPOSE: To stabilize the electrical resistance, and to improve the strength by mixing metal ion in the rubber or the resin of wheels. CONSTITUTION: Metallic salt is dissolved by the solvent for ionization, and this ionized metallic salt is added to the rubber or the resin of a wheel 2 of a carrying carriage 1 so as to give the electricity controlling property to the wheel 2. A member 3 for rotatably supporting the wheel 2 is fitted to the carriage 1 by a fitting member 4. The rubber or the resin of the wheel 2, in which the metal ion is mixed, is formed in the non-black color, and since electrical resistance thereof exists in a range of 10<5> -10<10> Ω.cm of volume resistivity, electrical resistance is stabilized, and the floor surface is not soiled by the caster, and the strength of the caster is not lowered. Light color filling material is used so as to set the hardness (JIS K 6301, spring type A) of the rubber or the resin at 60 deg. Hs or higher.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley caster, and more particularly to a trolley caster capable of removing static electricity charged.

[0002]

2. Description of the Related Art In general, a dolly caster cannot be used in a place where generation of static electricity is reluctant because wheels have no conductivity. Therefore, as a method of removing static electricity, a device for discharging static electricity (ground wire) is attached to the trolley, and charging is prevented by mixing conductive carbon black, conductive fiber, and conductive metal powder into the wheels. Wheels have been proposed.

[0003]

However, in the method of attaching the ground wire to the dolly, if the ground wire is dragged, dust will be attached to the tip of the ground wire and the effect of static elimination will decrease.

On the other hand, the method of mixing the conductive carbon black with the rubber or the resin of the wheel is to fill the conductive carbon black in order to lower the electric resistance, thereby polluting the floor surface with the black color of the carbon black and stabilizing the electric resistance. do not do.

In addition, in the method of mixing conductive fibers or conductive metal powder with rubber or resin of a wheel, strength is lowered by filling conductive fibers or conductive metal powder to reduce electric resistance, and Resistance is not stable.

An object of the present invention is to provide a trolley caster which has stable electric resistance, does not pollute the floor surface, does not deteriorate in strength, and can directly receive a load.

[0007]

A trolley caster according to the present invention is formed in a non-black color by mixing metal ions into rubber or resin of a wheel, and has an electric resistance of 10 ⁵ to 10 ¹⁰ Ω in volume resistivity. The hardness is in the range of cm and the hardness (JIS K6301, spring type A) is 60 ° Hs or more by the bright color filler.

[0008]

In the present invention, the rubber or resin of the wheels of the caster is formed in a non-black color by mixing metal ions, and the electric resistance is in the range of 10 ⁵ to 10 ¹⁰ Ω · cm in terms of volume resistivity,
The electric resistance is stable, the floor is not polluted, and the strength does not decrease.

Further, since the rubber or resin of the wheel has a hardness of JIS hardness of 60 ° Hs or more due to the light color filler, the load of the truck can be directly applied.

[0010]

1 and 2 are a schematic view showing an embodiment of a caster for a truck according to the present invention and a schematic side view of FIG. In the figure, reference numeral 1 is a carriage for transportation, and the carriage 1 for transportation is for carrying luggage. Reference numeral 2 is a wheel, and this wheel 2 has a metal salt dissolved in a solvent and added to rubber or resin in an ionized state so as to have antistatic property. Reference numeral 3 denotes a support member, and the support member 3 rotatably supports the wheel 2. Reference numeral 4 denotes a mounting member for mounting the support member 3 on the carriage 1.

[0011]

The caster for a trolley according to the present invention has an effect that electric resistance is stable, the floor surface is not polluted, the strength is not lowered, and the load of the trolley can be directly received.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a trolley caster according to the present invention.

FIG. 2 is a schematic view showing the relationship among the wheel, the supporting member, and the mounting member of FIG.

[Explanation of symbols]

 1 bogie 2 wheel 3 support member 4 mounting member

Claims (1)

[Claims] 1. A caster comprising a wheel made of rubber or resin, a support member for rotatably supporting the wheel, and a mounting member for mounting the support member on a carriage, wherein the rubber or resin of the wheel is a metal ion. It is formed in a non-black color by mixing with, and the electric resistance is in the range of 10 ⁵ to 10 ¹⁰ Ω · cm in volume resistivity, and its hardness (JIS K6301, spring type A type ) Is 60 ° Hs or higher, a dolly caster.