RU2363592C1 - Self-orienting roll to move furniture and so forth - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: self-orienting roll comprises, at least, one wheel driven horizontally via support seat that features vertical recess, open upward and axially shifted with respect to the shaft, to accommodate roll turning axle. Proposed roll comprises 1^st and 2^nd parts to be fitted into appropriate furniture seats. The 2^nd part has end smaller-diametre rod to form a ledge, sleeve fitted axially on the said rod to form a circular groove to receive flexible ring. Aforesaid ring, when extended, gets pressed to the recess wall.

EFFECT: reduced roll play in joint.

6 cl, 11 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a self-orientating roller for moving furniture and the like.

Prior art

Self-orientating rollers are known, in particular the so-called twin type, formed from two wheels mounted in such a way that they can rotate around the shaft. The shaft is supported in a seat, which is formed in a support structure located between the wheels and often representing a semi-cylindrical housing that closes the wheels in the upper region.

A vertical cylindrical recess is formed in the supporting structure, open at the top and offset axially relative to the shaft and acts as a rotation socket for the vertical axis for self-orientation (rotation) of the roller, which is designed to insert and hold the piece of furniture on which the wheel should be mounted.

Self-orientating rollers of the described type have the disadvantage that the axis for self-orientation of the roller can often cause excessive and unpleasant noise, especially when the roller is rolling on a rough surface, or if the nest of a piece of furniture intended for mounting the roller is formed inside a metal case. This is especially true in chairs or chairs that contain a metal base with radially adjustable levers, in which the rollers are mounted on the ends of the levers. This drawback, which exists even in modern rollers due to the inevitable backlash of the axes relative to the recess of the base, is amplified when the backlash as a result of use usually inevitably increases.

Disclosure of the present invention

The aim of the present invention is to remedy these disadvantages of known self-orientating rollers by providing a simple and effective solution that does not entail significant changes in the design of currently available rollers and, therefore, is cost-effective.

This goal is achieved by using a self-orientating roller formed of at least one wheel, which can rotate on a shaft that extends horizontally through a bearing seat, which contains a vertical cylindrical recess open at the top and offset axially relative to the shaft, and in which the axis for the rotation of the roller can be rotated using the first part and contains a second part that can be inserted into the socket of the piece of furniture on which the roller is to be mounted, characterized in that said second The second part contains an end rod, which has a reduced diameter for the formation of a protrusion, the sleeve being axially fixed to the specified rod and forming, together with the specified protrusion, an annular groove for accommodating without an axial clearance of the elastic ring, which is adapted to be pressed as a result of expansion to the wall of the specified recess.

Brief Description of the Drawings

Additional characteristics and advantages of the present invention will become more apparent from the following detailed description of a preferred, but not the only embodiment of the roller, illustrated as a non-limiting example in the accompanying drawings, in which:

figure 1 a General view of a self-orienting dual roller, including innovation, in accordance with the present invention;

figure 2 is a vertical side view of the roller of figure 1;

figure 3 is a vertical front view of the roller in figure 1;

figure 4 is a top view of the roller in figure 1;

5 is a view of the axis for rotation of the roller;

6 is a view with a spatial separation of the details of the axis in figure 5;

Fig.7 is a view in section of the axis of Fig.5;

Fig.8 is an axial projection of the axis of Fig.5;

Fig.9 is a General view of the axis in accordance with another embodiment;

figure 10 is a view with a spatial separation of the details of the axis in figure 9;

11 is a view in section of the end of the axis.

Methods of carrying out the present invention

As shown in FIGS. 1-8, reference numeral 1 usually denotes a generic twin roller of a self-orienting type, which consists of a supporting structure 2 for two wheels 3 mounted in such a way that they can rotate on a common shaft S, which has a horizontal axis A and passes through the nest of construction 2.

The structure 2 is made of plastic or metal and has a recess 4, which has a vertical axis, is located between the wheels 3 and accommodates the axis 5, by means of which the roller is mounted to rotate into a piece of furniture, for example a chair containing a base with radial levers, at the ends of which formed slots for installing rollers.

As is more clearly shown in FIGS. 5-8, the axis 5 for turning the roller has a cylindrical structure and comprises a lower part 6 and an upper part 7, which are separated from each other by an annular flange 8. An annular groove 9 is formed in the lower part 6, and at the end part 6, a conical cavity 10 is formed.

Part 6 is inserted into a recess 4, in which to hold the axis 5 in the axial direction there is an inner annular protrusion that engages with the groove 9 by applying force. A steel ball joint (not shown) is conveniently located in the lower part of the recess 4 and by means of engagement in the concave surface 10 acts as a reference point for the load that presses on the roller.

The upper part 7 of the axis 5 contains next to the annular flange 8 a conical connecting portion 11, which expands towards the specified flange, and a portion having a reduced diameter that forms the end rod 12. The end rod 12 is separated from the rest of the section 7 by a protrusion ( shoulder) 13. In addition, a blind end hole 14 is formed axially at the free end of the rod 12 and is surrounded by an annular protrusion 15.

A sleeve 16 made of plastic is used on the rod 12, and its length is such as to form, with the protrusion 13, when it is located on the rod 12, an annular groove 17. An open and elastic (i.e., elastically expanding) metal ring 18 is located in the groove 17, has a circular cross section and in an expanded state has an outer diameter that is slightly larger than the diameter of part 7, and an inner diameter that is at least equal to the diameter of the rod 12.

The ring 18 is locked in the groove 17 by a sleeve 16, which in turn is held onto the rod 12 by an annular protrusion obtained by bending the protrusion 15 outward. The sleeve 16 is put on the rod 12 with a slight tightness, and its position is set so that the ring 18 does not have an axial clearance in the groove, and at the same time is capable of locking radially on the axis when the specified axis is inserted into its seat of a piece of furniture (chair).

Advantageously, the sleeve 16 is locked on the shaft 12 by means of a holding force performed by the protrusion (bead) 15 in order to ensure the noise reduction of the roller even during prolonged use and in more adverse operating conditions.

It should be noted that the action of the ring 18, aimed at noise reduction, occurs both radially and axially. When the axis 5 is inserted into its nest in a piece of furniture (chair), the ring 18, due to its large radial dimensions, is pressed against the wall of this nest to compensate for the transverse vibrations that are transmitted from the axis to the base by means of a roller. At the same time, and this is the main prerogative of the idea of the present invention, the sleeve 16 due to the blocking effect acting axially on the ring 18 (which is blocked by the protrusion 15 relative to the protrusion 13), prevents any axial movement of it and, therefore, prevents the occurrence of vibration.

In its practical embodiment, the present invention is capable of numerous modifications and changes, all of which are within the scope of the same concept of the present invention. Thus, for example, the elastic ring 18 may have a square, rectangular or elliptical cross section. Advantageously, the elastic ring 18 has opposite ends (which form a gap) that are axially offset relative to each other, so that when the ring is inserted into the groove 17, one of its ends is pressed against the sleeve 12, and the other end is pressed into the protrusion 13.

Figures 9-11 illustrate an embodiment of a roller in which the shaft 12 does not contain a blind end hole 14, and the protrusion 15 for holding the sleeve 16 is obtained by flaring the outer edge of the shaft 12 to form an annular protrusion that projects outward from the shaft 12, and by axially on the sleeve 16 holds the ring 18 in a compressed state.

Claims (6)

1. Self-orientating roller containing at least one wheel (3) rotatably on a shaft (S) extending horizontally through a bearing seat (2), which contains a vertical cylindrical recess (4), which is open upward and axially displaced relative to the specified shaft, and in which the axis (5) for turning the roller (1) is made to rotate using the first part (6), and contains the second part (7), which can be inserted into the socket of the piece of furniture on which the roller should be mounted characterized in that the specified W Paradise part (7) contains an end rod (12), which has a reduced diameter for the formation of the protrusion (13), and the sleeve (16) is mounted axially on the specified rod (12) and forms, together with the specified protrusion (13), an annular groove (17) for placement without axial clearance of the elastic ring (18), which is made with the possibility of pressing by expanding to the wall of the specified recess (4). 2. Self-orientating roller according to claim 1, characterized in that said sleeve (16) is axially fixed to said shaft (12) by means of an annular protrusion (15) obtained by flaring the end of said shaft (12). 3. Self-orientating roller according to one of claims 1 and 2, characterized in that said sleeve (16) is made of plastic. 4. Self-orientating roller according to claim 1, characterized in that said elastic ring (18) has a round, quadrangular or elliptical cross section. 5. Self-orientating roller according to claim 2, characterized in that said annular protrusion (15) is formed by a blind end hole (14), which is axially formed at the end of said rod (12), said annular protrusion (15) being bent by means of flaring out. 6. Self-orientating roller according to claim 2, characterized in that said annular protrusion (15) is formed by axially flaring the outer edge of the end of said rod (12) to form a support protrusion for said sleeve (16).

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