JPH0430897Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to casters for bags.

[Prior art] Conventionally, caster wheels have used soft materials for their outer periphery, and in order to deform when subjected to load, a medium-height cross-sectional shape is required, and in order to produce that shape with a mold, It is necessary to break the mold at the parting line e shown in FIGS. 6 and 7. As a result, in Fig. 6, there are two parts on the outer circumference that do not form a correct circle, and smooth rolling cannot be expected. In addition, in FIG. 7, it is necessary to break the mold at the part with the largest diameter on the outer periphery, and the part where it is most difficult to make a correct circle is used as the ground contact surface. Although the purpose of wheels to move objects is to provide better rolling motion, they are used in a state where they cannot roll properly in a circle due to the reasons mentioned above.

For conventional wheels, how to precisely match the molds so that the rolling surface and the mold mating surface become e in Figures 6 and 7, or how to finish the outer periphery of the molded wheel well. The quality of the wheels depended on this. For this reason, it is extremely difficult to manufacture wheels that roll properly, and inferior wheels are sold on the market at high prices.

[Problems to be Solved by the Invention] An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a caster that performs good rolling.

[Means for Solving the Problems] The means of the present invention is to provide a caster attached to a bag at an angle inward from a right angle with respect to the ground surface, the wheels of which are flattened on the outer periphery, and the center of the flatness is The extension line has a required angle outside the right angle to the ground plane.

[Example] The wheel 1 has an angle β inward from the right angle with respect to the ground contact surface.
Attach it to the bag so that it extends outward. The outer periphery of the wheel 1 is defined as a flat surface 1a, and the flat center line a is shifted from the center line b of the tire by an angle of β+α (FIG. 3).

In the diagram, 2 is a thrust washer, 3 is a rivet, and 4 is a
indicates a caster stay, 5 indicates a retainer, 6 indicates a caster base, and 7 indicates a gasket.

[Effect] Since the grounding point d is selected to be offset from the flat center line a of the wheel, as the load increases, it approaches the flat center line a, and the movement of this rolling center line is the effect of receiving the load. Since the point is in a state where it is easy to change, the force is dispersed.

[Effects of the invention] According to the invention, the collapse of the main body 8, the deformation of the base 6 and the stay 4, the bending and destruction of the rivet 3 under heavy loads are eliminated, and the span of the wheels at the grounding point is reduced compared to conventional products. Because it is wide, it not only prevents your bag from overturning while driving, but also provides excellent straight-line performance.

By changing the shape of the tire, the present invention can achieve the purpose without adding any special work to manufacturing the caster or assembling the caster to the bag.
In this embodiment, the caster itself is also tilted, but the present invention is not limited to this; by tilting the tire mounting shaft, regardless of the method of mounting the caster, a caster that takes advantage of the characteristics of the wheel of the present invention can be provided.

[Brief explanation of the drawing]

Fig. 1 is a front view of the caster according to the present invention attached to a bag, Fig. 2 is a plan view, Fig. 3 is a front view of the main part, Fig. 4 is a longitudinal cross-sectional side view of half the wheel, and Fig. 5 is a front view of the caster according to the present invention attached to a bag.
The figure is a front view, and FIGS. 6 and 7 are a front view and a half longitudinal side view of a conventional wheel. 1...wheel, 1a...oblique surface.

Claims (1)

[Claims for Utility Model Registration] A caster for a bag consisting of a combination of the following two elements (a) and (b). (a) The caster is attached to a bag at an angle inward from a right angle to the ground surface; (b) The wheels of the caster have a flat outer periphery, and the center extension line of the flat surface The required angle is outside the right angle to the ground.