JPH068157Y2 - Forklift mast roller structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mast roller structure which is mounted on a lift bracket and rolls in a rail of the mast device in a mast device of a forklift.

[Conventional technology]

In the conventional mast roller structure of this type, as shown in FIG. 4, the mast roller a slides the inner surface of the rail b, so that the outer diameter of the mast roller a is made smaller than the inner width of the rail b, and the gap t is reduced. It is provided. However, the gap t causes looseness in the mast, and noise is generated due to the collision sound of the metal between the rail b and the mast roller a.

As a device devised to solve this problem
There is a technique disclosed in Japanese Patent Publication No.-42730.

This disclosed technology is one in which an annular groove is formed on the tread surface of the mast roller, an elastic wire made of polyurethane, synthetic rubber or the like is fitted into the groove, and the elastic wire is brought into contact with the inner surface of the rail. is there.

[Problems to be solved by the device]

However, due to the use of elastic filaments, the roller rolling surface of the rail was stripped or peeled off, and the elastic filaments were not durable and could not be put to practical use with polyurethane or synthetic rubber.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mast roller structure of a forklift truck which is durable and suitable for practical use.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a mast roller 1
An annular groove 6 is provided on the tread surface 5, and a ring member 7 formed by forming a cut portion 9 on a single ring 8 is inserted into the groove 6, and the outer surface of the ring member 7 is connected to the roller rolling surface 2 a of the rail 2. Is abutted against.

[Action]

The gap between the roller rolling surface 2a of the rail 2 and the mast roller 1 is adjusted by the ring member 7, and the spring force of this ring member 7 prevents the rail 2 and the mast roller 1 from colliding with each other, thereby eliminating the occurrence of collision noise.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the structure of the mast roller structure according to the present invention.
In the figure, 1 is a mast roller and 2 is a rail. The mast roller 1 is rotatably attached to the roller shaft 4 of the lift bracket 3.

An annular groove 6 is formed on the tread surface 5 of the mast roller 1, and a ring member 7 is inserted into the groove 6.

As shown in FIGS. 2 and 3, the ring member 7 is formed by forming a cutout portion 9 on a single ring member 8.
Is inserted into the groove 6 in a compressed state, and the outer surface 7a of the ring member 7 elastically contacts the roller rolling surface 2a which is the inner surface of the rail 2.

The depth F of the groove 6 is made larger than the width G of the single ring 8 of the ring member 7 so that the ring member 7 does not receive a load.

Then, the roller rolling surface 2a of the rail 2 and the mast roller 1
The gap is adjusted by the ring member 7, and the spring force of the ring member 7 prevents the rail 2 and the mast roller 1 from colliding. In particular, the ring member 7 has elasticity and comes into contact with the roller rolling surface 2a without difficulty and has durability.

[Effect of device]

The mast roller structure of a forklift according to the present invention is provided with an annular groove 6 on the tread surface 5 of the mast roller 1, and the groove 6
Then, the ring member 7 formed by forming the cutout portion 9 on the single ring 8 is inserted, and the outer surface of the ring member 7 is brought into contact with the roller rolling surface 2a of the rail 2.

Therefore, the gap between the roller rolling surface 2a of the rail 2 and the mast roller 1 is adjusted by the ring member 7, and the ring member 7 is adjusted.
The collision of the rail 2 and the mast roller 1 can be prevented by the spring force and the occurrence of collision noise can be eliminated. In particular, the ring member 7 has elasticity and comes into contact with the roller rolling surface 2a without difficulty, has durability, and is suitable for practical use.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of the present invention, FIG. 2 is a front view of a ring member, FIG. 3 is a side view of the same, and FIG. 4 is a structural explanatory view of a conventional forklift mast roller structure. 1 is a mast roller, 2 is a rail, 5 is a tread, 6 is a groove, 7
Is a ring member, 8 is a single ring, and 9 is a cutout part.

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped groove 6 is provided on a tread surface 5 of a mast roller 1, and a ring member 7 formed by forming a cutout portion 9 on a single ring 8 is inserted into the groove 6, and the outer surface of the ring member 7 is inserted. A mast roller structure for a forklift, which is in contact with a roller rolling surface 2a of a rail 2.