FR2552372A1 - Improvement to castors held between two flanges - Google Patents

Abstract

The invention relates to an improvement to castors 1, held between two flanges 4, 5, in particular castors pivoting about a vertical axis, especially castors held in a clevis and intended for furniture, the said castors having a hub 2 which is generally wider than their thickness. It is characterised by the fact that the beam fixed to the pin 31 projects, downwards, beneath the flanges 4, 5.

Description

Technical dozen
The invention relates to an improvement to the rollers held between two flanges, in particular rollers pivoting about a vertical axis, in particular the rollers held in a yoke and intended for furniture, said rollers having a hub generally wider than their thickness.

Problem
The casters defined in the previous paragraph have been widely known in furniture and handling equipment. One of their main drawbacks is the fact. that when they are rolled on a ground on which there may be threads, fluff, fibers or hairs, synthetic, natural, animal or vegetable, these threads or fibers tend to wind up in the space located between the flanges, the hub and the axle. This often results in blockage of the caster or at least more or less vigorous braking thereof.

 The only solution would be to manually remove the foreign elements. However, experience has shown that this is very difficult, if not impossible, especially when the axis is riveted. In any case, it is an uninteresting operation to carry out.

 The present invention is intended to avoid this drawback.

Statement of the invention
The invention is characterized mainly by the fact that the fixed part of the axis projects downwards under the flanges.

 In a first embodiment, the hub is an integral part of the caster and turns directly around a fixed axis, the central part of which has a diameter such that it projects under the flanges.

 In a second case, it is possible to provide an axis consisting of a rivet surrounded by a fixed tubular fur which projects under the flanges and on which the hub of the caster rotates.

Solution to the problem, advantages and industrial results
The fact that the fixed part of the axis protrudes towards the s, implies that the lateral faces of the hub come out and periodically enter flanges or lateral faces of the yoke so that the foreign elements which were placed there cannot get stuck there. These foreign elements are eliminated automatically during the rotation of the caster with its hub. In the case of tubular fur, foreign elements do not interfere either.

In any case, there is, in use, in one or the other case an absence of foreign elements. There is therefore no longer any possible blockage.

 We therefore arrive at the desired result by an excessively simple modification of the mounting of existing casters requiring no additional price.

 The invention will be better understood with the aid of the description below which gives two nonlimiting examples of practical implementation thereof and which are illustrated by the appended drawings.

Brief description of the figures
In these drawings,
Figure 1 is an axial vertical section of a first version of the wheel of the invention.

 Figure 2 is a side view of a caster of the invention in the case of a yoke pivoting about a vertical axis.

 Figure 3 is an axial vertical section of a second version of the caster of the invention with axis surrounded by a fixed tubular fur, which projects downwards on the flanges and on which the hub of the caster rotates .

Description of two embodiments
Referring to Figure 1, we see that ale roulette "(the latter" term "defining all of the roulette itself and its flanges and others) of lginventïon consists of a roulette (1), properly so-called having a hub (2) which forms an integral part thereof. The caster (1) is held by an axis (31) with shoulders (15, 16) between two flanges (4) and (5).

 The particularity of the invention lies in the fact that the axis (31) has its diameter as it appears under the flanges (4) and (5) so that the side faces (6) and (7) shoulders (15, 16) protrude, downwards, under said flanges (4) and (S). This feature is particularly visible in Figure 2 where the flanges (4) and (5) are part of a yoke (8) surmounted by a vertical axis (9) of oscillation of the entire "caster". In this case of "roulette", the flanges (4) and (5) of the yoke (8) generally have a curved shape, as can be clearly seen in FIG. 2.

 In another embodiment, shown in FIG. 3, the caster (11) rotates on the outside of a tubular element (12) which surrounds and tightens the rivet (32). The hub (17) obviously projects downwards under the flanges (4) and (5) to allow its lateral faces (13) and (14) to appear.

Claims (3)

 1. Improvement to the rollers (1) held between two flanges (4, 5), in particular the rollers pivoting about a vertical axis (9), in particular rollers held in a yoke (B) and intended for furniture, said rollers having a hub (2) generally wider than their thickness, characterized by the fact that the fixed beam of the axle (31, 12) projects downwards under the flanges (4, 5).  2. Roulette, as defined in claim 1, characterized in that the hub (2) is an integral part of the roulette (1) and rotates directly around an axis (31), the controlled portion of which e a diambtre such that it protrudes under the flanges (4,5)  3. Roulette, as defined in claim 1, characterized in that 1Faxe (3) consists of a rivet (32) surrounded by a tubular fur (12) fixed, which projects, towards the bottom, under the flanges and on which the wheel hub (1) turns.