PatentDe  


Dokumentenidentifikation EP1245735 07.11.2002
EP-Veröffentlichungsnummer 1245735
Titel Kehrmaschine
Anmelder O'Flynn, William Joseph, Kanturk, County, IE
Erfinder O'Flynn, William Joseph, Kanturk, County Cork, IE
Vertreter derzeit kein Vertreter bestellt
Vertragsstaaten AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE, TR
Sprache des Dokument EN
EP-Anmeldetag 26.03.2001
EP-Aktenzeichen 016500324
EP-Offenlegungsdatum 02.10.2002
Veröffentlichungstag im Patentblatt 07.11.2002
IPC-Hauptklasse E01H 1/04
IPC-Nebenklasse B66F 9/18   

Beschreibung[en]
Introduction

The present invention relates to a sweeping machine of the type comprising a main support housing, mounting by means of pivotal support arms, a rotatable cylindrical brush operated by a drive motor, the brush being mounted adjacent a debris skip, in turn, pivotally mounted in the main support housing and having releasable locking means whereby release of the locking means and raising of the machine above the ground causes the skip to pivot for discharge of any brushed debris therein.

In many instances, such sweeping machines are advantageously carried on the forks of a forklift truck or on the three-point linkage of a tractor. Unfortunately, as the standard of cleanliness required in areas, where such sweeping machines are used, rise, the efficiency of such sweeping machines has not risen commensurately. Thus, many such sweeping machines are relatively inefficient in action, either sweeping inefficiently or causing a considerable amount of dust and debris to fly around the area. To ensure that the brush can undergo some adjustment as it wears, it is known to mount the brushes on these pivotal arms. Unfortunately, the actual brushing has not been heretofore sufficiently efficient and the ground contact has not been good enough heretofore to provide efficient sweeping. A further problem is that of safety. What must be appreciated is that when, for example, the sweeping machine is mounted on the forks of a forklift truck or on the three-point linkage of a tractor, when the sweeping machine is raised to empty, the pivoting of the skip is quite violent, as it were, and accidents happen and in particular, accidents have happened when the sweeping machine has not been correctly secured to either the three-point linkage of the tractor or more importantly, to the forks of the forklift. A major problem is therefore to ensure that not alone can the sweeping machine be efficiently mounted on the forks of a forklift but further, that it can be mounted in such a way that the forks will be securely mounted on the sweeping machine and will not disengage therefrom during use.

A further problem with known sweeping machines is the ensure that the bucket or skip efficiently collects all the debris and retains it within the skip.

Accordingly, the present invention is directed towards providing a sweeping machine which will be efficient in use, will be more safely mounted, for example, on the forks of a forklift and will generally improve the sweeping capabilities of such machines.

Statements of Invention

According to the invention, there is provided sweeping machine of the type comprising a main support housing, mounting by means of pivotal support arms, a rotatable cylindrical brush operated by a drive motor, the brush being mounted adjacent a debris skip, in turn, pivotally mounted in the main support housing and having a skip release mechanism whereby release of the locking means and raising of the machine above the ground causes the skip to pivot for discharge of any brushed debris therein, characterised in that there is provided a fork hanger for mounting the fork of a forklift comprising an elongate socket having top, bottom and side plates and an open mouth for reception of the fork, and a releasable locking mechanism comprising a channel shaped hanger bracket having a fork retaining bar and two arms, the arms being pivotally mounted on the side plates and movable between a fork retaining position with the retaining bar across and spaced-apart from the open mouth of the socket to a position free of the open mouth to allow insertion of the fork and releasable securement means for mounting the hanger bracket in the fork retaining position. This ensures that the sweeping machine will always be firmly mounted on the forklift truck or on the back of a three point linkage of a tractor and can be easily connected and removed therefrom in safety.

Ideally, the releasable securement means comprises an extension plate mounted on one of the arms and projecting away from the retaining bar and movable from a position against the arm to a position spaced-apart therefrom and an open mouthed extension plate receiving slot formed from a pair of laterally projecting plates on the exterior of the socket whereby movement of the extension plate (65) away from the arm disengages it from the slot to allow pivotal movement.

In one embodiment, the extension plate is urged by a spring against the arm.

According to the invention, there is also provided a support frame for attaching the sweeping machine to the three-point linkage of a tractor comprising an upright frame carrying on one face thereof, a pair of forwardly projecting fork-like members and on the other face thereof, three link sockets for mounting on the three-point linkage of the tractor. This allows the use of the invention with the three-point linkage of a tractor which can be very important where a forklift truck or the like is not available.

Ideally, the skip release mechanism comprises:-

  • a pivot arm pivotally mounted on the main support housing;
  • a roller mounted adjacent the free end of the arm;
  • a stop mounted on the exterior of the skip; and
  • means for pivoting the arm into and out of engagement with the stop.

In this latter embodiment, the arm is pivotally mounted intermediate its ends by a pivot pin and the means for pivoting the arm is a fluid operated ram connected to the arm adjacent the end remote from the roller.

Ideally, the pivotal support arms are spring biased downwards for ground contact.

In this latter embodiment, preferably, the springs are adjustable.

In one embodiment of the invention, the skip comprises a flat base having a leading edge dose to the brush mounted in the main support housing so as to extend substantially horizontally away from the brush in the operating position and in which there is provided rearward of the leading edge an upwardly projecting retaining lip for the retention of brushed liquids within the skip.

Ideally, the retaining lip comprises a transversely arranged and upwardly inclined plate behind the leading edge.

Preferably, a further plate extends rearwardly from the uppermost part of the plate to the base of the skip, the two plates and the base forming a triangle in cross-section. Ideally, the leading edge of the skip incorporates a wear plate extending rearwardly to the retaining lip.

One particular suitable construction of skip comprises a bucket-like member including in cross section, a substantially flat base having a leading edge positioned dose to the brush and extending rearwardly to a rear wall and then forwardly to a top wall back across the base towards the brush and a pair of spaced-apart side plates bridging the base, rear wall and top wall.

Ideally, the top wall extends sufficiently across the base to form an impact plate for brush debris. In this way, irrespective of how vigorously the brushing takes place, debris will be retained within the skip. Ideally, the rear wall is arcuate in shape.

In another embodiment of the invention, there is provided a spray bar assembly comprising a spray with associated water tanks and pump mounted on the exterior of the main support housing adjacent the front thereof in the direction of travel of the sweeping machine and in which the pump has control means linked to the brush drive motor whereby the pump only operates when the brush is being driven.

Preferably, an auxiliary kerb brush is provided comprising:-

  • a brush assembly;
  • a support arm carrying the brush assembly on one end thereof, its other end being mounted on the main support frame by a pivot connector for pivotal movement between a storage position on the machine to a position projecting laterally from the machine with the brush assembly in the operative position; and
in which the brush assembly comprises:-
  • a support frame;
  • a drive shaft carried on the frame;
  • a disc mounting a plurality of upstanding bristles on one end of the shaft;
  • a drive motor mounted on the support frame; and
  • a brush protector comprising a guard rail projecting laterally beyond the disc.

Detailed Description of the Invention

The invention will be more clearly understood from the following description of an embodiment thereof, given by way of example only, with reference to the accompanying drawings, in which:-

  • Fig. 1 is a front view of a sweeping machine according to the invention,
  • Fig. 2 is a plan view,
  • Fig. 3 is a side view,
  • Fig. 4 is a partially cut away view and diagrammatic view showing the brush mounting,
  • Fig. 5 is a detail sectional view through the skip,
  • Fig. 6 is a perspective view of a fork hanger according to the invention,
  • Fig. 7 is a sectional view along the lines VII-VII of Fig. 6,
  • Fig. 8 is a view similar to Fig. 7 showing the fork hanger in the open fork receiving position,
  • Fig. 9 is a side view of the sweeping machine showing the skip and brush within the machine,
  • Fig. 10 is a detailed view of the circled portion of Fig. 9,
  • Fig. 11 is a perspective view of a kerb brush forming part of the sweeping machine, and
  • Fig. 12 is a perspective view of a mounting for use with the three-point linkage of a tractor.

Referring to the drawings and initially to Figs. 1 to 3, there is illustrated a sweeping machine, indicated generally by the reference numeral 1, comprising a main support housing 2 having two fork hanger brackets, indicated generally by the reference numeral 3, a skip release mechanism 4, and cantilevered support arms 5 mounting jockey wheels 6. A spray bar assembly comprising water tanks 7, pipes 8, a pump 9 and a spray nozzle 10 are also mounted in the exterior of the main support housing 2. The pump 9 is linked to a drive for a cylindrical sweeping brush described below. A kerb brush, indicated generally by the reference number 15, is mounted by means of a cantilevered support arm 16 on the side of the main support housing 2.

Referring now specifically to Figs. 4, 5, 9 and 10, there is illustrated a cylindrical brush, indicated generally by the reference numeral 20, on a shaft 21 mounted by pivotal support arms 22 on the main support housing 2. A drive motor 23 is also shown for the shaft 21. A spring 25 is mounted by a support 26 on the main housing 2 and is connected at its other end at 27 to the shaft 21. A skip, indicated generally by the reference numeral 30 is illustrated in Figs. 5, 9 and 10 and comprises a flat base 31 having a leading edge 32 formed by a wear plate 33. The flat base 31 extends substantially horizontally away from the brush in the operating position as can be seen in Fig. 9. Rearward of the leading edge, there is provided an upwardly projecting lip, indicated generally by the reference numeral 35. It will be noted that the lip 35 is formed from a pair of inclined plates 36 which together with the base 31, form a triangle in cross section.

The base 31 extends into an arcuate rear wall 38 which then extends around to a top wall 39 which projects across the base 31 towards the brush 20. A pair of side plates 40 complete the construction of the main portion of the skip. What is important to note is that the leading edge 41 of the top wall 39 extends across the base 31 and is designed to project sufficiently across the base so that any debris thrown up by the rotating brush 20 will impact onto the top wall 39 which therefore forms an impact plate for brush debris. Suitable pivots are provided on the side plates 40 to mount the skip 30 in the main support housing but are not shown in the drawings.

Mounted on the exterior of the rear wall 38 is a stop formed from a piece of angle iron having a top face 43 and a front face 44. The remainder of the skip release mechanism 4 comprises means for pivoting an arm, a ram 45 mounted by a support 46 on the main support housing 2 and mounting on its other end, a pivot arm 47 carrying on its free end, a roller 48 which is shown lying on the top face 43 of the angle iron. The pivot arm 47 is mounted on a pivot pin 49 intermediate its ends. In use, extending the ram 45 in the direction of the arrow A, will cause the pressure to go off the roller 48 to cause the roller 48 to disengage from the top face 43 and for the skip to pivot and empty. The support housing is in the raised position when this happens and the debris will fall out of the skip 30. Then, the sweeping machine is lowered to the ground, the base 31 of the skip lying on the ground, and the skip will pivot back into its previous position, the front face 44 of the angle iron contacting and passing under the roller 48.

Referring now to Figs. 6, 7 and 8, there is illustrated one of the fork hanger brackets 3 in more detail. The hanger bracket 3 comprises an elongate socket having a top plate 50, a bottom plate 51, side plates 52 and an open mouth for reception of the fork of a forklift. There is further provided a releasable locking mechanism comprising a channel-shaped hanger bracket having a fork retaining bar 53 mounted by means of side plates forming arms 54 mounted by pivots 55 on the side plates 52. A releasable securement means, indicated generally by the reference numeral 60, is provided by a length of channel forming an extension plate receiving slot 61 by means of two laterally projecting plates 62 on one of the side plates 52. An extension plate 65, having a handle 66, engages the pivot 55 by means of a slot 67 and is supported on the side plate 54 by a spring loaded bolt 68 carrying a spring 69. The extension plate 65 is movable away from the side plate 54 and is urged back into engagement therewith by means of the spring 69. In operation, the locking mechanism 60 is pivoted into the position illustrated in Fig. 8 by withdrawing the handle 66 so as to withdraw the retaining plate 65 out of the receiving slot and hence allows it to pivot. Then, the fork of a forklift truck is entered into the socket and the locking mechanism is put back into the position illustrated in Fig. 6 now with the fork of the forklift, as shown by the interrupted lines and identified by the reference numeral 70, secured therein.

Referring now to Fig. 11, the kerb brush 15 comprises a brush assembly comprising, by a plurality of bristles 71 and a support frame 77 mounted on a disc 72 which in turn is mounted on a vertical drive shaft 73 driven by a hydraulic drive motor 75, A brush protector, namely, a guard rail 76, formed by an annular rim is provided. The guard rail 76 projects beyond the disc 72. The support arm 16 is pivotally mounted by a pivot connector 77 on the main support housing 2 (see Fig. 1).

Referring now to Fig. 12, there is illustrated an adaptor, indicated generally by the reference numeral 80, for mounting the sweeping machine 1 on a three-point linkage of a tractor. The adaptor 80 comprises essentially an A frame 81 having mounting sockets for the three-point linkage of the tractor, namely, a top link socket 82 and lower link sockets 83 and carrying forwardly directed tines 84 for insertion within the fork hanger brackets 3.

In use, the sweeping machine 1 is operated in the normal manner. However, when the spray nozzle 10 is operated, a considerable quantity of water will be directed over the ground in front of the sweeping machine which will be swept up by the brush 20 and will then be swept over the lip 35 and thus will be retained within the skip 30. Further, the particular shape of the skip will ensure that any debris swept up by the brush 20 falls back into the skip 30 and is not delivered out of the sweeping machine.

In the specification the terms "comprise, comprises, comprised and comprising" or any variation thereof and the terms "include, includes, included and including" or any variation thereof are considered to be totally interchangeable and they should all be afforded the widest possible interpretation.

The invention is not limited to the embodiments hereinbefore described but may be varied within the scope of the appended claims.


Anspruch[en]
  1. A sweeping machine (1) of the type comprising a main support housing (2), mounting by means of pivotal support arms (22), a rotatable cylindrical brush (20) operated by a drive motor (23), the brush (20) being mounted adjacent a debris skip (30), in tum, pivotally mounted in the main support housing (2) and having a skip release mechanism (4) whereby release of the locking means (4) and raising of the machine (1) above the ground causes the skip (30) to pivot for discharge of any brushed debris therein, characterised in that there is provided a fork hanger (3) for mounting the fork (70) of a forklift comprising an elongate socket having top (50), bottom (51) and side plates (52) and an open mouth for reception of the fork (70), and a releasable locking mechanism comprising a channel shaped hanger bracket having a fork retaining bar (53) and two arms (54), the arms being pivotally mounted on the side plates (52) and movable between a fork retaining position with the retaining bar (53) across and spaced-apart from the open mouth of the socket to a position free of the open mouth to allow insertion of the fork (70) and releasable securement means (60) for mounting the hanger bracket in the fork retaining position.
  2. A sweeping machine (1) as claimed in claim 1, in which the releasable securement means (60) comprises an extension plate (65) mounted on one of the arms (54) and projecting away from the retaining bar (53) and movable from a position against the arm (54) to a position spaced-apart therefrom and an open mouthed extension plate receiving slot (61) formed from a pair of laterally projecting plates (62) on the exterior of the socket whereby movement of the extension plate (65) away from the arm (54) disengages it from the slot to allow pivotal movement
  3. A sweeping machine (1) as claimed in claim 1 or 2, in which the extension plate (65) is urged by a spring (69) against the arm (54).
  4. A sweeping machine (1) as claimed in any preceding claim, in which there is provided a support frame (80) for attaching the sweeping machine (1) to the three-point linkage of a tractor comprising an upright frame (81) carrying on one face thereof, a pair of forwardly projecting fork-like members (84) and on the other face thereof, three link sockets (82, 83) for mounting on the three-point linkage of the tractor.
  5. A sweeping machine (1) as claimed in any preceding claim, in which the skip release mechanism (4) comprises:-
    • a pivot arm (47) pivotally mounted on the main support housing (2);
    • a roller (48) mounted adjacent the free end of the arm (47);
    • a stop mounted on the exterior of the skip (30); and
    • means for pivoting the arm (47) into and out of engagement with the stop.
  6. A sweeping machine (1) as claimed in claim 5, in which the arm (47) is pivotally mounted intermediate its ends by a pivot pin (49) and the means for pivoting the arm is a fluid operated ram (45) connected to the arm (47) adjacent the end remote from the roller (48).
  7. A sweeping machine (1) as claimed in any preceding claim, in which the pivotal support arms (22) are biased downwards by springs (25) for ground contact.
  8. A sweeping machine (1) as claimed in claim 7, in which the springs (25) are adjustable.
  9. A sweeping machine (1) as claimed in any preceding claim, in which the skip (30) comprises a flat base (31) having a leading edge (32) dose to the brush (20) mounted in the main support housing (2) so as to extend substantially horizontally away from the brush (20) in the operating position and in which there is provided rearward of the leading edge (32) an upwardly projecting retaining lip (35) for the retention of brushed liquids within the skip (30).
  10. A sweeping machine (1) as claimed in claim 8, in which the retaining lip (35) comprises a transversely arranged and upwardly inclined plate (36) behind the leading edge.
  11. A sweeping machine (1) as claimed in claim 10, in which a further plate (37) extends rearwardly from the uppermost part of the plate (36) to the base (31) of the skip (30), the two plates (36, 37) and the base (31) forming a triangle in cross-section.
  12. A sweeping machine (1) as claimed in any preceding claim, in which the leading edge (32) of the skip (30) incorporates a wear plate (33) extending rearwardly to the retaining lip (35).
  13. A sweeping machine (1) as claimed in any preceding claim, in which each skip (30) comprising a bucket-like member including in cross section, a substantially flat base (31) having a leading edge (35) positioned close to the brush (20) and extending rearwardly to a rear wall (38) and then forwardly to a top wall (39) back across the base (31) towards the brush (20) and a pair of spaced-apart side plates (40) bridging the base (31), rear wall (38) and top wall (39).
  14. A sweeping machine (1) as claimed in claim 13, in which the top wall (39) extends sufficiently across the base (31) to form an impact plate for brush debris.
  15. A sweeping machine (1) as claimed in claim 13 or 14, in which the rear wall (38) is arcuate in shape.
  16. A sweeping machine (1) as claimed in any preceding claim, in which there is provided a spray bar assembly comprising a spray (10) with associated water tanks (7) and pump (9) mounted on the exterior of the main support housing (2) adjacent the front thereof in the direction of travel of the sweeping machine (1) and in which the pump (9) has control means linked to the brush drive motor (23) whereby the pump (9) only operates when the brush (20) is being driven.
  17. A sweeping machine (1) as claimed in any preceding claim, in which there is provided an auxiliary kerb brush (15) comprising:-
    • a brush assembly (71);
    • a support arm (16) carrying the brush assembly (71) on one end thereof, its other end being mounted on the main support frame by a pivot connector (77) for pivotal movement between a storage position on the machine to a position projecting laterally from the machine (1) with the brush assembly (71) in the operative position; and
    in which the brush assembly comprises:-
    • a support frame (77);
    • a drive shaft (73) carried on the frame;
    • a disc (72) mounting a plurality of upstanding bristles (71) on one end of the shaft (73);
    • a drive motor (75) mounted on the support frame (77); and
    • a brush protector comprising a guard rail (76) projecting laterally beyond the disc (72).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

Anmelder
Datum

Patentrecherche

Patent Zeichnungen (PDF)

Copyright © 2008 Patent-De Alle Rechte vorbehalten. eMail: info@patent-de.com