MEANS FOR CONNECTING A UNIT FOR TREATING FLOOR SURFACES WITH A ROD LIKE MEMBER, INTENDED FOR GUIDING SAID UNIT

Abstract: The invention relates to a coupling means (20) for coupling a floor-treating unit (1) to a unit-guiding rod-like device (70). The coupling means comprises a first coupling part (21), which forms part of the rod-like device (70), and a second coupling part (22) which forms part of the unit (1), wherein the second coupling part is mounted for rotation (23) relative to the unit (1), so as to enable the unit to be guided over the floor. The first coupling part (21) and the rod-like device (70) can be moved vertically in relation to the second coupling part (22), so that in a first positional setting, the second coupling part (22) is latched against rotational movement, and so that in a second positional setting, the latch is released and the second coupling part (22) can be rotated relative to the unit (1) by means of the rod-like device (70).

Description: TITLE OF THE INVENTION; Means for Connecting a Unit for Treating Floor Surfaces with a Rod Like omT ^ . Intended for Guid¬ ing Said Unit TECHNICAL FIELD The present invention relates generally to means for mutually connecting two machine elements, and more specifically to coupling means for use with a floor- treating unit and a rod-like device intended for guiding or steering the unit. According to the invention, the coupling means includes a first coupling part belonging to the rod-like device and a second part belonging to said unit, and that said second part is pivotally mounted on said unit such as to enable the unit to be steered over the floor. BACKGROUND ART The use of a rod-like device which has a handle mounted on its upper free end and by means of which a floor- treating unit is manoeuvred when wishing to move and steer said unit over a floor surface is previously known to the art, in various forms. As an example of the state of the prior art, reference is made to the teachings of U.S. Patent Specification No. 3,310,828 and U.S. Patent Specification No. 1,401,400, of which the construction disclosed in the first mentioned patent specification is thought to lie closest to the present invention. This prior publication teaches a rod-like flexible device provided with an upper SUBSTITUTESHEET handgrip which is pivotally mounted in relation to the floor-treating unit on a horizontal, bottom axle such as to enable the unit to be rotated horizontally and steered by rotating and tilting the rod-like device when moving said unit over the floor for the purpose of treating said floor. The object of the present invention is to provide means which will enable a floor-treating unit of the kind shown in principle in Figure 6 of the International Patent Application No. PCT/SE90/00133 to be manoeuvred in a simple fashion, although it will be understood that the invention is not limited to this application since the principle features of the invention can be applied with other units than floor-treating units. With regard to the inventive linkage system, reference is made to the present state of the art and also to the disclosures made in the International Patent Applica- tion No. PCT/US88/01391. DISCLOSURE OF THE INVENTION TECHNICAL PROBLEMS When considering the state of the prior art as descri¬ bed and illustrated in the aforesaid published applica¬ tions, it will be seen that a technical problem, from the aspect of construction and of manoeuverability, resides in the provision of simple coupling means which afford the advantage that a first coupling part and a second coupling part which enables the unit to be ma¬ noeuvred easily over a floor surface are pivotally connected to one another via a horizontally or general- ly horizontally extending pivot axle which can be locked in a position which will prevent rotation in this position by vertical displacement of said parts in relation to one another, thereby to cause the rod-like device to adopt a latched position, preferably in an upward direction, which therewith facilitates rolling transport and movement of the unit over the floor surface or the like. It will also be seen that a technical problem resides in the provision of a simple construction which is adapted to a floor-treating unit and which enables the first part of said coupling means to be moved vertical¬ ly in relation to the second part of said coupling means, by applying an upwardly directed force or a downwardly directed force to the rod-like device. It will also be seen that a technical problem resides in the provision of a coupling means which will also enable the unit and rod-like device to be adjusted to a third position or setting by relative displacement of the first coupling part in relation to the second coupling part, solely by activating the rod-like de¬ vice. In this third position, the rod or the rod-like device can be rotated via a horizontal hinge means to a position in which said rod or rod-like device lies over the unit, a so-called storage position. It will also be seen that a technical problem is one of realizing that this third position shall be the upper- most position. It will also be seen that a technical problem resides in the provision of a construction in which the first position is the lowermost position and thereby provide conditions such that latching of said rotational movement is now effected by means of a latch which acts between the frame of said unit and said second coupling part or said rod. Another technical problem is one of creating a design for the first coupling part and the second coupling part such that these parts will not only solve the aforesaid technical problems but can also be manufac¬ tured by plastic moulding methods. SOLUTION The present invention provides a solution to one or more of the aforesaid technical problems and is based on a floor-treating unit which is guided by means of a rod-like device, and relates to the provision of a novel means for coupling the unit to said device. The invention has for its starting point a coupling means which includes a first coupling part which belongs to said rod-like device and a second coupling part which belongs to said unit, this second coupling part being pivotally mounted on the unit in a manner to enable the unit to be guided when moved over the floor. In accordance with the present invention, the first coupling part is displaceable in relation to the second coupling part in a (vertical) direction between at least two different positional settings. In the first of these settings, the second coupling part is latched against rotation in relation to the unit, whereas in the second setting the latch is released the second coupling part is able to rotate relative to the unit about a horizontal axle, in response to tilting the rod-like device. In accordance with proposed embodiments which lie within the scope of the invention, the rod-like device, when moved to the first setting, extends upwardly and enables the unit to b*» transported and rolled on the floor. In a third setting, the second coupling part and the rod are collapsed over the unit, through the medium of a hinge means, thereby bringing the rod and the unit to a so-called storage or stowing position. It is also suggested that the third positional setting is the uppermost position. It thus follows that the first setting may be the lowermost setting, in which case latching of the rotary movement between the second coupling part and the unit can be effected with the aid of a latch that is active between the unit frame and the second coupling part or the rod. According to one particularly embodiment of the inven¬ tion, the rotational axle of the second coupling part of the coupling means extends horizontally or generally horizontally in a direction between two wheels and over or through circular plate or rondel mounted on the unit. ΛPVANTΛgES Those advantages primarily afforded by the inventive coupling means reside in the provision of conditions which will enable a floor-treating unit, and particu- arly a floor-treating unit of the kind illustrated and described in the aforesaid international patent ap¬ plication, to be manoeuvred readily, and to enable the unit to be transported or rolled over the floor in a simple fashion on two wheels, or to enable the floor treating unit to be manoeuvred and guided when moved over the floor in response to the rotational position of a rod-like device. The invention also enables the rod-like device to be lowered over the unit into a stowing or storage position. Each of these possibilities is provided through the medium of vertical relative displacement of a first, rod-activating coupling part in relation to a second coupling part belonging to said unit. The primary characteristic features of the inventive coupling means are set forth in the characterizing clause of the following Claim 1. BRIEF DESCRIPTION PF THE DRAWINGS The significant features of an exemplifying embodiment of the present invention at present preferred will now be described with reference to the accompanying draw¬ ings, in which Figure la is a perspective view of a floor-treating unit of principally the same construction as the unit described and illustrated in the aforesaid international patent application; Figure lb is a further perspective view of the unit illustrated in Figure la; Figure 2 is a perspective view of a coupling means which couples the floor treating unit to the rod-like device which steers said unit, said coupling means being shown in a first latched position, a so-called transport position; Figure 3 iβ a perspective view of the coupling means and shows the means in a second position in which a latch is released such that the second coupling part is able to rotate relative to the unit about a horizontal axle; Figure 4 shows in perspective a third position of adjustment in which the rod-like device is lowered over the unit in a stowing or stor¬ age position; Figures 5, are various projections of a first coupling 6 and 7 part or guide slide of said coupling means; and Figures 8, are different projection views of a second 9 and 10 coupling part or guide housing of said coupling means. DESCRIPTION OF EMBODIMENTS AT PRESENT PREFERRED Figure 1 is a perspective view of a floor-treating unit of principly the same construction as the unit descri- bed and illustrated in the aforesaid international patent application. The floor treating unit will not therefore be described in detail here. For the sake of simplicity, those components which have counterpart in the aforesaid International Patent Application No. PCT/SE90/00133 have been identified by the same reference signs as those used in said applica¬ tion, and the international patent application is considered to form part of this application. It will be understood that the inventive coupling means is not restricted solely to use with a floor-treating unit of the kind illustrated in Figures la and lb. It will also be understood that the illustrated and des- cribed unit merely constitutes an exemplifying embodi¬ ment of the inventive unit. Figure 2 is a perspective view of a floor-treating unit 1 and a rod-like device 70 which is coupled to the unit 1 by means of a coupling means 20 and which functions to steer or guide said unit. The illustrated coupling means 20 includes a first coupling part 21 which forms part of the rod-like device 70 and a second coupling part 22 which forms part of the unit 1. The second coupling part 22 is rotatably mounted on the unit 1 and, when in the position illustrated in Figures la and lb, is rotated either clockwise or anticlock¬ wise, according to the position to which the rod-like device 70 is tilted, thereby to enable the unit 1 to be guided over the floor surface 2 whtn said unit is moved over the floor for the purpose of treating the same. The second coupling part 22 is mounted for rotation about a horizontal axle 23. The rod-like device 70 is intended to coact with the first coupling part 21 through the medium of a horizon¬ tal hinge means 24, and preferably through the medium of a connecting device not shown. The first coupling part 21 is displaceably mounted in relation to the second coupling part 22 and is able to take one of several positional setting. The displacement movement is effective when said move¬ ment is directed vertically and is initiated by exert¬ ing a pulling force or a pressing force on the rod-like device 70. In a first, lowermost position, shown in Figure 2, the second coupling part 22 is latched against rotational movement in relation to the unit 1. In a second, slightly higher setting, shown in Figure 3, the latch is released so that the second coupling part 22 can be rotated in relation to the unit 1 by tilting the rod-like device 70 to different positions. As will be seen from the Figure 2, in the first setting position, the rod-like device 70 extends upwards and enables the unit to be readily transported or moved, by tipping the unit and supporting said unit solely on the wheels 5, 5', wherein the rondel 4 is raised slightly above the floor surface 2. In a third setting, shown in Figure 4, the rod-like device can be lowered down over the unit 1 to a unit stowing or storage position through the medium of a horizontal hinge device 24. It will be seen from Figures 2, 3 and 4 that the third position or setting, the position shown in Figure 4, is the uppermost position of the first coupling part 21, and Figure 4 also shows means for latching rotational movement of the second coupling part 22 in relation to the unit 1, with the aid of stop devices 25, 25' moun¬ ted on the unit 1 on a respective side of the rod-like device 70. It follows from this that the first position, shown in Figure 2, is the lowermost position of the first coupling part 21. This requires latching of the rota¬ tional movement of the second coupling part 22 in relation to the unit 1, by positioning the rotational axle 24 in a position so far down in the second coupling part 22 that the rod-like device 70 unable to swing away from or towards the unit 1 and such that the rod-like device is positioned in a groove formed in the unit 1 and defined by the stop devices 25. The rotational axle 23 of the second coupling part 22 extends horizontally, or generally horizontally, in a direction such that the geometric extension of the axle will pass between the two wheels 5, 5' and through or over a rondel 4 mounted on the unit. Figures 5, 6 and 7 illustrate different projections of the first coupling part 21 of the rod-like device 70. This coupling part 21 has the form of a guide slide and is provided on its upper part 21a with means which can form the hinge means 24. The bottom part 21b of the guide slide is provided with studs 41, 41a. Figures 8, 9 and 10 are different projectional views of the second coupling part 22, or guide housing, of the unit l. The second coupling part 22 has the form of a channel or hollow tube and is provided at its upper part 22a with a channel restriction 30a, thereby necessitating insertion of the guide slide 21 from beneath; in Figure 9 through the wider channel opening in the lower part 22b. In the uppermost position (Figure 4), the pegs 41, 41a each engage a respective channel restriction 30a. In the intermediate position, the guide slide 21 is in a position in which the rotational axle 24 is located slightly above a centre line 31a of a centrally posi¬ tioned rotational axle 31, and the handle and the rod¬ like device 70 can be turned to the right and to the left and away from the unit 1. In the lowermost position, the rotational axle 24 shall be located beneath the centre line 31a and a cover plate 30c locks the hinge means 24 between the rod-like device 70 and the guide slide 21, so as to position the rod-like device vertically. Rotational movement of the guide housing 22 is locked by placing the rod-like device 70 in a groove or slot provided in the unit. The lowermost position is defined by engagement of the guide slide with a stop (not shown). The restriction 30a is upwardly conical, such as to lock the pegs 41, 41a against the guide housing in the uppermost position, by means of a clamping action. It will be understood that the invention is not res- tricted to the aforedescribed and illustrated exempli¬ fying embodiment thereof, and that modifications can be made within the scope of the invention as defined in the following Claims. It will be noted that in the aforesaid second position¬ al setting, the first coupling part 21 will be located in a position in which a rotational axle 24 of said part 21, which in the position shown in Figure 4 is horizontal but which can be rotated around a horizontal rotational axle 23, is position perpendicularly in relation to the rotational axle 23. In the position illustrated in Figure 3, the axle 24 is located close to but slightly above the rotational axle 23. This distance may be from 1 to 5 cm.

Claims: CLAIMS 1. A coupling means for coupling a floor-treating unit with a unit-guiding rod-like device, said means com- prising a first coupling part (21) which forms part of said rod-like device, and a second .coupling part (22) which forms part of said unit, wherein the second coupling part is rotat-ably mounted on the unit (1) such as to enable the unit to be guided or steered over the floor, c h a r a c t e r i z e d in that the first coupling part (21) is moveable relative to the second part (22) such that when in a first positional setting (Figure 2), the second coupling part (22) is latched against rotational movement, and when in a second positional setting (Figure 3), the latch is released and the second coupling part (22) is able to rotate relative to the unit (l) in response to move¬ ments of the rod-like device (70). 2. Means according to Claim 1, c h a r a c ¬ t e r i z e d in that in the first setting (Figure 2) , the rod-like device is upstanding for easy transporta¬ tion of the unit (l). 3. Means according to Claim l or 2, c h a r a c ¬ t e r i z e d in that in a third setting (Figure 4), the rod-like device (70) is lowered over the unit (1), through the medium of a hinge device (24), in a so- called stowing or storage position. 4. Means according to Claim l or 3, c h a r a c ¬ t e r i z e d in that the third position is an upper¬ most position. 5. Means according to Claim 1 or 2, c h a r a c ¬ t e r i z e d in that the first position (Figure 2) is a lowermost position; and in that latching of the rotational movement is effected by means of a latch that acts between the frame (1) of the unit and the second coupling part (22) or the rod-like device (70). 6. Means according to Claim 1, c h a r a c - t e r i z e d in that the rotational axle (23) of the second coupling part extends horizontally or generally horozintally in a direction such that its geometric extension will pass between two wheels (5, 5') and over a rondel (4) mounted on the unit.

Inventors: LILJA BO VILHELM, LILJA, BO, VILHELM
Applicants: LILJA BO VILHELM, LILJA, BO, VILHELM
Application year: 1991
Main classification: A47L11
IPC codes: A47L11