Abstract:
A large-scale cleaning vehicle, for operation with a forklift, includes rotation brushes for sweeping debris toward a center of said cleaning vehicle, a sweeping brush for sweeping the debris into a debris collection box and a fan for pulling said debris into said debris collection box without the need for a motor in the cleaning vehicle. Each of the rotation brushes, the sweeping brush, and the fan are rotatably connected to a rear wheel of the cleaning vehicle such that when the cleaning vehicle is moved, the brushes and fan are rotated. The cleaning vehicle further includes a vertical adjustment for the rotation brushes to lift them when they are not needed, a lateral adjustment for the rotation brushes to adjust a width of sweeping, an audible warning for pedestrians, a water sprinkler system to aid in the cleaning process, and a large-scale trash removal brush mounted in front of the cleaning vehicle to push large-scale trash.

Description:
This application is a division of application Ser. No. 08/856,458, filed May 14, 1997, now U.S. Pat. No. 5,987,699, issued Nov. 23, 1999. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to large-scale cleaning vehicles. More specifically, the present invention relates to a large-scale cleaning vehicle that is pushed forward using a forklift vehicle. The present invention also relates to structural elements and accessories for the same. 
     Referring to FIG. 6, a frame  1  serves as a main body of a conventional cleaning vehicle, on which is mounted an engine  2  and a blower  3 . On either side of the front section of frame  1  are mounted cone-shaped rotating brushes  4 , which are oriented downward and which draw together debris toward the center. Engine  2  drives blower  3  and rotating brushes  4 . A hopper  6  is connected to a duct  5  of blower  3 . Hopper  6  is disposed on frame  1  behind blower  3 , and a debris evacuation opening  7  is disposed behind and below hopper  6 . A filter  8  is also disposed in hopper  6 . A flexible tube  9  is fitted into a side wall of hopper  6 . The lower end of flexible tube  9  forms a suction opening  10 . Flexible tube  9  is hung down from an appropriate position on frame  1 . An engagement member  11  for engaging a lift bracket of a forklift vehicle is disposed toward the back of frame  1 . When the rear portion of frame  1  is lifted up, the rotating brushes are separated from the ground. When motor  2  drives blower  3  and moves brushes  4 , debris is moved through suction opening  10  and filter  8  disposed at an upper portion within hopper  6  collects the suctioned debris. 
     The rotating brushes  4  of the conventional large-scale cleaning vehicle are fixed to a rotating brush support member so that debris can be collected over a wider span than the width of a standard large-scale cleaning vehicle. 
     Conventionally, there have been no large-scale cleaning vehicles equipped with sprinkler devices or sound generating devices that give off warning sounds. 
     In conventional large-scale cleaning vehicles, an engine is used to drive the blower and the rotating brushes. Thus, the weight and the size of the cleaning vehicle is excessive. There are also problems in terms of cost. Furthermore, the vehicle could not make tight maneuvers. 
     In the conventional technology, when a rotating brush is fixed to the large-scale cleaning vehicle, debris can be collected only over a fixed width. Thus, cleaning operations cannot be performed in paths that are narrower than the width of the vehicle with the rotating brushes attached. Furthermore, since the rotating brush is always kept in contact with the ground or the like, it is possible for the brush to become deformed outward, thus obstructing the debris-collecting operation. 
     In conventional large-scale cleaning vehicles, it is possible to sweep up small pieces of trash with the brush, but large pieces of trash such as newspapers cannot be swept up with the brush. Thus, large pieces of trash cannot be cleaned. 
     In the cleaning operation performed by the conventional large-scale cleaning vehicle, the rotation of the rotating brush causes debris to blow up, thus disturbing the debris and also making debris collection less efficient. Often, the debris adhered to the ground cannot be removed by the rotating brush. 
     Furthermore in the conventional technology, operations are performed alone, and operators are not able to converse. During cleaning, the noise from the rotating brush and the engine make the work monotonous and uninteresting, so that morale can be low. 
     Also, the operator can experience fatigue because it is always necessary to be careful for pedestrians. Thus, there is a need for the pedestrians themselves to be alerted so that accidents can be avoided. 
     OBJECTS AND SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a large-scale cleaning vehicle in which rotating brushes, sweeping brushes, and fans can be rotated without the use of an engine. The present invention can also make tight maneuvers. In the present invention, the operator of the forklift can evacuate the debris collected in the debris collection box while staying in the driver&#39;s seat. Furthermore, when the present invention is used on uneven surfaces, the claw and the bottom surface are kept from being damaged. 
     It is a further object of the present invention to improve debris-collecting efficiency and lifespan by attaching a rotating brush so that it can move freely both laterally and vertically, and so that it is fixed at a prescribed angle using a knock pin or the like. This makes it possible to perform debris collection over a desired range. When the rotating brush is not being used, the brush can be pulled up so that the efficiency of the brush is not decreased and the life-span is increased. 
     It is a further object of the present invention to provide a large-scale trash removal device that pushes large pieces of trash together. A large-scale trash removal device is attached to the front of the large-scale cleaning vehicle and can be raised when there is no large-scale trash. The height of the large-scale trash removal device can be adjusted according to the height of the ground with which it is in contact. 
     It is yet a further object of the present invention to provide a vehicle that sprinkles water to prevent the debris from rising up, thus removing debris adhered to the ground and also washing off the grime from the ground. 
     Lastly, it is a further object of the present invention to inform pedestrians that cleaning is taking place, maintain safety, provide peace of mind for the operator so that he or she can concentrate on the task at hand, and to make the cleaning operation, which tends to be monotonous, more enjoyable. This is achieved by attaching a sound generating device to the large-scale cleaning vehicle. 
     Briefly, a large-scale cleaning vehicle, for operation with a forklift, includes rotation brushes for sweeping debris toward a center of said cleaning vehicle, a sweeping brush for sweeping the debris into a debris collection box and a fan for pulling said debris into said debris collection box without the need for a motor in the cleaning vehicle. Each of the rotation brushes, the sweeping brush, and the fan are rotatably connected to a rear wheel of the cleaning vehicle such that when the cleaning vehicle is moved, the brushes and fan are rotated. The cleaning vehicle further includes a vertical adjustment for the rotation brushes to lift them when they are not needed, a lateral adjustment for the rotation brushes to adjust a width of sweeping, an audible warning for pedestrians, a water sprinkler system to aid in the cleaning process, and a large-scale trash removal brush mounted in front of the cleaning vehicle to push large-scale trash. 
     According to an embodiment of the present invention, there is disclosed, a large-scale cleaning vehicle pushed by a forklift vehicle comprising: a frame having roughly a cube shape, rotating brushes are attached downward at ends of a front portion of said frame, a rear wheel and a front wheel supporting said frame, a casing within said frame, said casing being roughly cube shaped and having a top surface and a rear side surface left open, a filter is connected to said top surface of said casing, a debris collection box is movably attached inside said casing, said debris collection box having a top surface and a rear side surface left open, a rotation of said rear wheel is transferred to said pair of rotating brushes disposed on the front of said large-scale cleaning vehicle, said rotation being transferred using a rotational transfer member, debris is swept toward a center and rear portion of a central portion of said large-scale cleaning vehicle, said rotation of said rear wheel is also transferred to a sweeping brush disposed at the rear of said large-scale cleaning vehicle using another rotational transfer member, debris swept by said rotating brush disposed on the front of said large-scale cleaning vehicle is swept up by said sweeping brush, said rotation of said rear wheel is also transferred to a fan using a rotational transfer member, said fan drawing said swept-up debris toward said filter, air cleaned by said filter is sent outward from said top surface of said casing, and said debris is collected in said debris collection box disposed below said filter. 
     According to another embodiment of the present invention, there is disclosed, a large-scale cleaning vehicle comprising: a vehicle body frame is supported by a pair of rear wheels and a single front-wheel caster, a fork insertion member is movably attached to said frame, brackets for supporting rotating brush attachment members are attached pointing downward to the bottom of the ends of said frame, said rotating brush attachment member, to which said rotating brush is attached pointing downward, is attached integrally to a connecting rod, an end of said connecting rod is movably mounted to a back of said bracket for supporting said rotating brush attachment member, a plurality of holes is formed on said bracket and said rotating brush attachment member, prescribed holes are made continuous and a fixing pin is inserted through said holes, and on said bracket is disposed a vertical rod for applying tension to a belt disposed across pulleys for rotating said rotating brush. 
     According to another embodiment of the present invention, there is disclosed, a large-scale cleaning vehicle with a water sprinkling device comprising: a vehicle body frame, a fork insertion member movably attached to said vehicle body frame supported by a pair of rear wheels and a single front wheel, a rotating brush support bracket is attached pointing downward on a bottom of said frame, a rotating brush attached to an end of said rotating brush support bracket, a water tank holding a volume of water mounted on said frame, a water sprinkler pipe is disposed across a front of said frame, said water sprinkler pipe having a plurality of nozzles, and said volume of water being connected to said water sprinkler pipe such that said water passes from said water tank through said water sprinkler pipe and out of said plurality of nozzles. 
     According to yet another embodiment of the present invention, there is disclosed, a cleaning vehicle, comprising: a frame having a front end and a rear end, an insertion member pivotally connected at said front end of said frame, said insertion member being shaped to receive a connecting member from a second vehicle which supplies a motive force to said cleaning vehicle; said frame being supported by a rear wheel and a front wheel, a rotating brush assembly connected to said front end of said frame, at least one rotating brush rotatably connected to at least one rotating brush support plate, said at least one rotating brush support plate being pivotally connected to said rotating brush assembly, said at least one rotating brush support plate being pivotable between an outer position and an inner position to adjust a width of sweeping, a sweeping brush positioned toward a rear end of said frame, a debris collection box hingably connected at a bottom of said tray, a fan being operationally connected to said debris collection box such that rotation of said fan pulls debris swept by said sweeping brush into said debris collection box, and each of said at least one rotating brush, said sweeping brush, and said fan being rotatably connected to said rear wheel such that said each of said at least one rotating brush, said sweeping brush, and said fan rotates when said rear wheel is rotated. 
     In the large-scale cleaning vehicle of the present invention, it is possible to rotate the rotating brushes, sweeping brushes, and fans without an engine. The rotation of the wheel shafts is used to rotate the rotating brushes, sweeping brushes, and fans. 
     Specifically, the large-scale cleaning vehicle of the present invention is pushed forward by a forklift vehicle. The accompanying rotation of the rear wheels of the large-scale cleaning vehicle is transferred to a shaft of a sweeping brush through the meshing of gears, thus rotating the sweeping brush. Furthermore, the rotation of the shaft of the sweeping brush is transferred to a shaft disposed on the front of the large-scale cleaning vehicle using a transfer member such as a belt or the like. The rotation of this shaft is then transferred to the shaft of a fan or a rotating brush using a transfer member such as a belt, thus rotating the fan or rotating brush. 
     The large-scale cleaning vehicle ofthe present invention is able to perform tight maneuvers. This is accomplished by movably disposing a fork fitting member on the upper surface of the large-scale cleaning vehicle. 
     The fork fitting member is formed with a shape that allows the fork of a forklift vehicle to be loosely inserted. The fork fitting member is movably attached to the upper surface of the large-scale cleaning vehicle of the present invention. The fork of the forklift vehicle is loosely inserted into the fork fitting member, and the large-scale cleaning vehicle is moved forward. The swinging of the fork fitting member swings the large-scale cleaning vehicle to the left and right, thus allowing the large-scale cleaning vehicle to make tight maneuvers. 
     The large-scale cleaning vehicle of the present invention makes it possible for the forklift operator to eject the debris collected in the debris collection box without getting up from the driver&#39;s seat. A ratchet that can move up and down is attached to a frame, which forms the vehicle body of the large-scale cleaning vehicle. The bend in the ratchet is suspended at the bottom ofthe debris collection box, and the other end of the ratchet is connected to a wire. The wire is operated by the forklift operator to eject the debris held in the debris collection box. 
     The top side and one of the side walls of the debris collection box in the frame are left open. The debris collection box is movably connected to the frame. The opened side wall and the bottom surface of the opposite wall are suspended by the hooked portion of the ratchet. When the forklift operator pulls the wire, the ratchet is drawn up. The debris collection box, which is suspended from the hooked portion of the ratchet, is swung, and the debris held in the debris collection box is ejected outside from the open side. 
     When the large-scale cleaning vehicle of the present invention is used on uneven ground, the claw disposed on the debris collection box and the bottom surface of the debris collection box are prevented from being damaged. A caster disposed on a side surface ofthe debris collection box comes into contact with the ground before the claw or the bottom surface of the debris collection box does. This protects the claw and the bottom surface of the debris collection box. 
     Casters are movably attached on the two side surfaces of the debris collection box and are connected with a coil spring to the side surfaces. A stopper is disposed on the side surface of the debris collection box in order to keep the lower edge of the caster slightly closer to the ground than the claw and the bottom surface of the debris collection box. Since the caster is always kept closer to the ground than the claw and the bottom surface of the debris collection box, the large-scale cleaning vehicle of the present invention can be used over uneven surfaces without damaging the claw or the bottom surface of the debris collection box. 
     A rotating brush support plate is attached pointing downward to the bottom part of the vehicle body frame. On the inner surface of the rotating brush support plate is attached a pair of upper and lower brackets to hold the upper and lower portions of a rotating brush attachment member. A connecting rod is formed integrally with the rotating brush attachment member. The end of the connecting rod is movably mounted into the back section of the bracket, and the connecting rod is passed through holes formed on the bracket and the rotating brush attachment member. The connecting rod is fixed between the rotating brushes using a fixing pin. This allows the rotating brushes to move to the left and right. 
     Hollow caster attachment legs are attached downward to the vehicle body at a central position between the rotating brushes, which are attached downward on the ends of the vehicle body frame at the front of the large-scale cleaning vehicle. The rotatable front-wheel caster is mounted downward on a support plate. The support plate is fixed to the bottom end of a shaft which is rotatably fitted within the lower portion of the caster attachment leg so that it can slide up and down. A bracket is disposed on the support plate, and the bent portion of a foot lever formed in a shape of a bell crank is movably mounted to the bracket. A connecting rod connects one end of the foot lever and the caster attachment leg. A tension spring elastically supports the connecting point between the connecting rod and the caster attachment leg and the connection point between the foot lever and the bracket. Upward and downward motions of the foot lever allow the rotating brush to move up and down. 
     In the large-scale trash removal device of the present invention, a largescale trash collection brush or an elastic plate such as a rubber plate is attached to the large-scale cleaning vehicle so that it can be lifted up or down. 
     Furthermore, a water tank is mounted on top of the frame of the large-scale cleaning vehicle. A nozzle is disposed on the front of the frame, and a water sprinkler pipe is disposed across the frame to serve as a water sprinkler device for the large-scale cleaning vehicle. A sensor and a sound generating device is attached and the sound generating device is activated when the fork is attached or removed. 
     The above, and other objects, features and advantages of the present invention will become apparent from the following description read in conjunction with the accompanying drawings, in which like reference numerals designate the same elements. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an elevational side-view of a large-scale cleaning vehicle according to the present invention. 
     FIG. 2 is a plan drawing of the large-scale cleaning vehicle of FIG.  1 . 
     FIG. 3 a  is a side-view of a fork fitting member of the large-scale cleaning vehicle of FIG. 1, viewed from the left side. 
     FIG. 3 b  is a front-view of the fork fitting member of FIG. 3 a.    
     FIG. 4 is an enlarged, schematic diagram of the area around a debris collection box of the large scale cleaning vehicle of the present invention. 
     FIG. 5 is an elevational side-view showing how the large-scale cleaning vehicle of the present invention is used. 
     FIG. 6 is an elevational side-view showing an example of conventional large-scale cleaning machine. 
     FIG. 7 is a perspective view of an embodiment of the large-scale cleaning vehicle of the present invention. 
     FIG. 8 is a schematic plan drawing of one of the rotating brushes of the large-scale cleaning vehicle of FIG.  7 . 
     FIG. 9 is a schematic diagram viewed from the side of the large-scale cleaning vehicle of FIG.  7 . 
     FIG. 10 is a partial elevational front-view of the main elements of the large-scale cleaning vehicle of the present invention with a foot lever for lifting up the rotating brush. 
     FIG. 11 is an elevational side-view of the main elements of the large-scale cleaning vehicle of the present invention with a foot lever for lifting up the rotating brush of FIG.  10 . 
     FIG. 12 is a cross-sectional view along the XII—XII line in FIG.  10 . 
     FIG. 13 is an elevational side-view showing another embodiment of the present invention with a large-scale trash removal device. 
     FIG. 14 is a plan drawing showing how the large-scale trash removal device of FIG. 13 is used. 
     FIG. 15 is an elevational front-view, showing how the large-scale trash removal device of FIG. 13 is used. 
     FIG. 16 is an elevational side-view showing the large-scale trash removal device of FIG. 15 in a raised state. 
     FIG. 17 is an elevational front-view of another embodiment of the large-scale trash removal device. 
     FIG. 18 is an elevational side-view drawing ofthe large-scale trash removal device of FIG.  13 . 
     FIG. 19 is an enlarged elevational front-view of the large-scale trash removal device of FIG.  13 . 
     FIG. 20 is an elevational side-view showing the large-scale trash removal device of FIG. 19 in a raised state. 
     FIG. 21 is a perspective drawing of another embodiment of the large-scale cleaning vehicle with a water sprinkler device. 
     FIG. 22 is a schematic cross-section drawing of the large-scale cleaning vehicle with a water sprinkler device of FIG.  21 . 
     FIG. 23 is a perspective drawing of yet another embodiment of the large-scale cleaning vehicle with a sound generating device. 
     FIG. 24 is an expanded, partially cut-out cross-section drawing showing the sound generating device mounted in the fork fitting member of the large-scale cleaning vehicle of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to the drawings, the following is a description of the preferred embodiments of the present invention. 
     Referring to FIGS. 1 and 2, a frame  12  forms the upper section of a large-scale cleaning vehicle  75 . Frame  12  is supported at three points by a pair of rear wheels  18  and a single front wheel caster  19 . 
     Frame  12  is rectangular in shape. Rotating brush support plates  13  are attached pointing down at the left and right ends of a front portion of frame  12 . A rotating brush  14  is attached to the end of each rotating brush support plate  13 . A roughly cube-shaped casing  16  is connected to frame  12 . Casing  16  houses a debris collection box  15 . A sweeping brush  17  is rotatably connected at a rear side of frame  12 . The upper and rear surfaces of debris collection box  15  that face sweeping brush  17  are left open. 
     A shaft  21  of rear wheel  18  is connected to a gear held in a gear box  20 . Another gear that meshes with this gear is connected to a shaft  22  of sweeping brush  17 . Gear box  20 , or another type of rotational transfer member, allows the rotation of rear wheel  18  to be transferred to sweeping brush  17  via the gears so that sweeping brush  17  is rotated. The gears are meshed so that rear wheel  18  and sweeping brush  17  rotate in opposite directions. 
     Shaft  22  of sweeping brush  17  is attached to a pulley  23 . A belt  24  is reeved about pulley  23  and another pulley  26 . Pulley  26  is disposed on a shaft  25  at the front of the large-scale cleaning vehicle and supported by frame  12 . Shaft  25  is long enough to go from the left side surface to the right side surface of large-scale cleaning vehicle  75 . Including pulley  26 , four pulleys are disposed on shaft  25 . 
     Pulleys  27 , disposed near the left and right ends of shaft  25  serve as rotational transfer members for rotating brushes  14 . For each rotating brush  14 , a belt  29  is bridged across pulley  27  and a pulley  28 . Pulley  28  is attached to rotating brush support plate  13  disposed toward the front of frame  12 . The rotation of pulley  28  is transferred to the shaft of rotating brush  14 , causing rotating brush  14  to rotate. 
     Shaft  25  further includes a pulley  30 . A belt  33  is reeved about pulley  30  and a pulley  32 , which is connected to a fan shaft  31 . Fan shaft  31  is supported by frame  12 . The rotation of shaft  27  is transferred to fan shaft  31 . A fan  34 , which is connected to fan shaft  31 , is thereby rotated. 
     Referring now also to FIG. 5, a forklift vehicle  91  pushes large-scale cleaning vehicle  75  of the present invention. As forklift vehicle  91  pushes large-scale cleaning vehicle  75 , the rotation of rear wheels  18  causes left and right rotating brushes  14  to rotate. The rotation of rotating brush  14  collects debris toward the center of large-scale cleaning vehicle  75 . Brush  17 , which is also rotated by the rotation of rear wheels  18 , sweeps up the collected debris. As brush  17  sweeps up the collected debris, the swept debris is drawn to debris collection box  15  by fan  34 , which is also rotated by the rotation of rear wheels  18 . In casing  16 , a filter  47  is attached to a position corresponding to the upper surface of debris collection box  15 . Air containing the debris drawn in by fan  34  is cleaned by filter  47 , and the debris drops into debris collection box. The air which is drawn by fan  34 , now free of debris, leaves filter  47  and is dispersed outside via the open upper surface of casing  16 . 
     Referring now to FIGS. 1,  3   a , and  3   b , a fork-fitting member  35  of large-scale cleaning vehicle  75  comprises: a box  36  into which the fork of forklift vehicle  91  is fitted and which has one of its side walls left open; and a support plate  37  for mounting box  36 . The front of support plate  37  and the front of frame  12  are rotatably connected by a pin. Fork-fitting member  35  swings over side plates disposed on the left and right sides of frame  12 . Also, a support plate is disposed on fork fitting member  35  across the width of frame  12  so that fork fitting member  35  is prevented from arching upward. 
     Referring now to FIGS. 1,  2 , and  4 , a claw  45  is disposed on the open side of debris collecting box  15  toward sweeping brush  17 . Debris collecting box  15  is disposed within casing  16  and attached to casing  16  so that it can swing freely around a pin  40 . The lower surface of debris collection box  15  is suspended by a hook-shaped ratchet  39 , and the upward and downward motions of ratchet  39  allow debris collection box  15  to swing. 
     Casters  41  are loosely inserted in the left and right gaps between debris collection box  15  and casing  16 . Casters  41  are attached so that they can pivot around debris collection box  15  and pin  42 . Casters  41  are connected to debris collection box  15  via a coil spring so that upward tension is applied to casters  41 . A stopper  44  is disposed on debris collection box  15  in order to keep caster  41  at a fixed position as it is pulled up. Stopper  44  is disposed at a position that stops caster  41  when its lower edge is slightly below (i.e. toward the ground) the bottom surface and claw  45  of debris collection box  15 . When debris collection box  15  is pulled upward with ratchet  39 , stopper  44  pushes caster  41  downward. If ratchet  39  is not pulling debris collection box  15  upward, an upward force is acting on caster  41  from coil spring  43 . Referring specifically to FIG. 4, the force is applied clockwise. However, when stopper  44  pushes caster  41  down to the fixed position, i.e. past the position where caster  41  and coil spring  43  are parallel to each other, coil spring  43  applies a downward force to caster  41 . The force is applied counterclockwise. Stopper  46  is disposed on debris collection box  15  so that when caster  41  is being pulled down, it stops at a position where it is positioned roughly perpendicular to the ground. Thus, the lower end of caster  41  will always be further toward the ground than the bottom surface of debris collection box  15  and claw  45 . Thus, the bottom surface of debris collection box  15  and claw  45  are prevented from damage. 
     The following is a description of the embodiment of the present invention, wherein a rotating brush is attached so that it can swing freely. 
     Referring to FIG. 5, large-scale cleaning vehicle  75  pushed by forklift vehicle  91  rotates rotating brush  14 . A frame  12  forms the upper section of the large-scale cleaning vehicle. Frame  12  is supported at three points by a pair of rear wheels  18  and a single front wheel caster  19 . Fork fitting member  35  is disposed on frame  12 . The fork of forklift vehicle  91  is inserted into fork fitting member  35  to push large-scale cleaning vehicle  75  forward. 
     Referring now to FIG. 7, there is shown an enlarged perspective drawing of the main elements of large-scale cleaning vehicle  75  of the present invention. Left and right rotating brush support plates  13  are attached downward below the left and right ends of frame  12 . Upper and lower brackets  49  are fixed horizontally to the inner sides of support plates  13 . 
     A rotating brush attachment member  50  is formed in the shape of a square “C”. Rotating brush attachment member  50 , to the front of which rotating brush  14  is attached pointing downward, is loosely inserted into upper and lower brackets  49 . The base end of a connecting rod  51  is connected to rotating brush attachment member  50 , and the end of connecting rod  51  is movably mounted into a bolt  53  disposed toward the back of upper and lower brackets  49 . Thus, rotating brush attachment member  50  and rotating brush  14  can be swung to the left and right about bolt  53 . 
     Referring now also to FIGS. 8 and 9, openings  49   a ,  49   b  are disposed at the ends of upper and lower brackets  49 . Openings  49   a  and  49   b  both lie on the circumference of a single circle centered about bolt  53  and are positioned at equivalent positions on upper and lower brackets  49 . Holes  50   a  are also formed at corresponding positions in the upper and lower surfaces (i.e. the horizontal sides) of rotating brush attachment member  50 . When hole  50   a  and hole  49   a  of are aligned, knock pin  54  is inserted and fitted through the aligned holes. Knock pin  54  fixes brush attachment member  50  to rotating brush support plate  13 . 
     When rotating brush  14  is to be moved inward, knock pin  54  is disengaged from the aligned holes and rotating brush attachment member  50  is rotated inward about bolt  53  to align hole  50   a  and hole  49   b . Then, knock pin  54  is inserted and fitted again to fix brush attachment member  50  to rotating brush support plate  13 . 
     A primary drive pulley  55  is fixed to shaft  17   a  of sweeping brush  17  disposed behind rear wheel  18 . Driven pulley  58  is attached in front of rotating brush attachment member  50  and serves to transfer the drive force to rotate rotating brush  14 . The drive force from the rotation of rear wheel  18  is transferred to rotating brush  14  via belt  58 , which bridges primary drive pulley  55  and driven pulley  56 . Referring momentarily to FIG. 9, a tension pulley  57  is also shown. 
     Furthermore, the motion of rotating brush  14  and rotating brush attachment member  50  causes driven pulley  56  and tension pulley  57  to move. When this happens, belt  58  is prevented from becoming slack by disposing a vertical rod  52  between the lower portion of frame  12  and bracket  49  and inward from belt  58 . 
     The following is a description of the foot lever for raising the rotating brush. Referring to FIG. 1, vehicle frame  12  of the cleaning vehicle is formed as a square and is supported at three points by a pair of rear wheels  18  and a single front wheel  19 . 
     A caster attachment leg  90  is attached downward at a central portion of the front of vehicle frame  12 . A shaft  59  is inserted in caster attachment leg  90  from the bottom. Shaft  59  is fitted so that it can slide up and down and rotate freely. Front caster  19  is mounted downward at the lower portion of shaft  59  and is fixed integrally to a support plate  60 , which forms a brim. 
     Referring to FIG. 10, there is shown a front-view drawing showing front wheel caster  19  and rotating brush  14  attached to the front part of vehicle frame  12 . A rotating brush  14  is attached facing down to each end of vehicle frame  12 , but only one rotating brush is shown in the drawing. Support plate  60 , which is formed by overlapping two plates, and front wheel caster  19  is rotatably mounted on lower support plate  60 . A pair of brackets  61  is disposed on the upper surface of upper support plate  60 . 
     Referring now also to FIG. 11, support plate  60  of front wheel caster  19  is fixed integrally to the lower surface of shaft  59 . A pair of brackets  61  is disposed on the upper surface of support plate  60 , which projects out from the perimeter of shaft  59  like a brim. A bell-crank foot lever is movably mounted into these brackets with a pin  62   a . Foot lever  62  is U-shaped when viewed from the side. 
     One end of foot lever  62  is connected to a connecting member  63  via a connecting rod  64  and a connecting pin  64   a . Connecting member  63  is supported on caster attachment leg  90 . 
     A tension spring  65  is disposed between a connecting point  64   a  and a connecting point  62   a . Connecting point  64   a  is the connection between connecting member  63  and connecting rod  64 . Connecting point  62   a  is the connection between the bend in foot lever  67  and bracket  61 . 
     Referring now to FIG. 12, to prevent rotation of shaft  59 , an inward projection  90   a  is formed on a section of caster attachment leg  90 . A flat end surface  59   a  is formed on a section of shaft  59  to come into contact with inward projection  90   a.    
     Referring again also to FIG. 11, the dotted line shows how the foot lever operates. When foot lever  62  is kicked up or down, support plate  60 , which is connected via bracket  61  to foot lever  62 , is moved up and down. Likewise, shaft  59  and front wheel  19 , which are fixed to support plate  60 , are also moved up and down. This causes rotating brush  14 , which is integrally connected with caster attachment leg  90  to vehicle frame  12 , to move up and down. 
     The following is a description of the preferred embodiments of a large-scale trash removal device attached to a large-scale cleaning vehicle. Referring to FIGS. 13-15 and  18 - 19 , a large-scale trash removal device  74  comprises: a brush  66   a ; arms  67   a ,  67   b ; support rods  69   a ,  69   b ; a connecting rod  70   a ; a vertical rod  71 ; a squeezing piece  72 ; and a connecting rod  73 . Referring to FIG. 14, large-scale trash removal device  74 , comprising these members, is attached to a large-scale cleaning vehicle  75  so that it projects toward the front of large scale cleaning vehicle  75 . 
     Large-scale trash removal device  74  and large-scale cleaning vehicle  75  are connected via liftable arms  67   a ,  67   b  around shafts  76   a ,  76   b . The ends of arm  67   a  and arm  67   b  are supported by supporting rods  69   a ,  69   b  so that the members are formed roughly in the shape of a rectangle. 
     The ends of support rod  69   a  are fixed to large-scale cleaning vehicle  75  via shafts  76   a ,  76   b . Arms  67   a ,  67   b  are attached to support rod  69   a  so that they can be lifted up and down. Arms  67   a ,  67   b  and support rod  69   b  are fixed to shafts  76   c ,  76   d  at the end opposite from the large-scale cleaning vehicle. Support rod  69   b  is fixed so that it overlaps with vertical rod  71   a.    
     Lower arm  67   b  is longer than upper arm  67   a , and a hooked hole  68  is disposed on lower arm  67   b  into which  76   b  is loosely inserted. Support  69   b  fixes the relative positioning of arm  67   a  and one end of arm  67   b . Support arm  69   a  is fixed to large-scale cleaning vehicle  75 . Thus, when arms  67   a ,  67   b  are lifted up, a force is applied to arm  67   b  to make it move to the right and up. 
     Arms  67   a  and arm  67   b  are also supported in a diagonal orientation by connecting rod  70   a . Connecting rod  70   a  and arm  67   a  are rotatably attached around shaft  76   e . A slot  70   b  is disposed at a lower portion of connecting rod  70   a , which supports arms  67   a ,  67   b . Shaft  76   b  is loosely inserted into slot  70   b . Since the relative positioning of arm  67   a  and one end of arm  67   b  is fixed by support rod  69   b , connecting rod  70   a  is raised when arms  67   a ,  67   b  are lifted up. This makes it possible to upwardly displace connecting rod  70   a.    
     Vertical rod  71   a  on the right side and vertical rod  71   a  on the left side are connected in the shape of an “H” by connecting rod  73 . The lower end of vertical rod  71  is opened downward. Vertical rod  71  is attached to a squeezing piece  72 , which is formed with a cavity oriented toward the large-scale cleaning vehicle on the side facing the ground. A brush  66   a  is inserted into squeezing piece  72 . If an elastic plate  66   b  made from a rubber plate or the like is used, elastic plate  66   b  (not shown in FIGS. 13-15 or  18 - 19 ) is inserted into squeezing piece  72  in the same manner. 
     Slots  71   b ,  71   b  are disposed on an upper and lower section of vertical rod  71   a . By changing the fixing position between arms  67   a ,  67   b  and support rod  69   b , it is possible to adjust the height of brush  66   a . This makes it possible to have the brush position correspond with the height of the ground. Arms  67   a ,  67   b  are fixed via shafts  76   c ,  76   d.    
     Referring to FIGS. 16 and 20, when large-scale trash removal device  74  is not being used, it is possible to draw it upward so that brush  66   a  is kept away from the ground. When arms  67   a ,  67   b  are lifted up around shafts  76   a ,  76   b , arm  67   b  is drawn diagonally, to the up and to the right in FIG.  20 . The hooked section of hooked hole  68  disposed on arm  67   b  is fitted with shaft  76   b . This maintains the raised configuration. When large-scale trash removal device  74  is to be lowered from the raised state, arm  67   b  is drawn up and the engagement between the hooked section of hooked hole  68  and shaft  78   b  is disabled. This will cause large-scale trash removal device  74  to return back to the ground from its own weight. 
     The description above covered the embodiment of large-scale trash removal device  74 . However, in another embodiment, there is no slot  71   b  disposed on vertical rod  71   a . Thus, the height of brush  66   a  cannot be adjusted. Otherwise the structures of this embodiment are identical to those of the embodiment described above. 
     Referring to FIG. 17, in the large-scale trash removal device  74 , an elastic plate  66   b  made from a rubber plate is used instead of brush  66   a . Otherwise the structures of this embodiment are identical to those of the above described embodiment. 
     Referring to the drawings, the following is a description of the large-scale trash removal device with a sprinkler device. Referring to FIG. 5, a frame  12  forms the upper portion of large-scale cleaning vehicle  75  and is supported at three points by a pair of rear wheels  18  and a single front-wheel caster  19 . Rotating brushes  14  are attached to the end of two rotating brush support plates  13 , which are attached pointing downward to the front of the frame. The vehicle is moved forward by inserting a fork into fork fitting member  35 , which is movably attached to the upper surface of the frame. 
     Referring to FIGS. 21 and 22, a pair of bases  79  is attached to the left and right sides of upper surface  12   a  of frame  12 , which forms the upper portion of large-scale cleaning vehicle  75 . A water tank  80  is mounted and fixed on bases  79 . 
     A hole  82  is formed toward the right end of upper surface  12   a  of the frame. A water pipe  81  is inserted in a water-tight manner into hole  82 . A water pipe  81  projects up from hole  82 . The upper end of water pipe  81  is inserted in a water-tight manner to the bottom of water tank  80 . A prescribed number of sprinkler pipes  83  continuous with water pipe  81  is laid across the front of front-wheel caster  19 , which supports frame  12 . Multiple nozzles  83 a are disposed on sprinkler pipe  83 , and a cock valve  84  is attached to water pipe  81  to adjust the water flow. A left side of water pipes  83  is connected to a closed pipe  85 , such that water entering water pipes  83  must exit through nozzles  83   a.    
     The following is a description of the large-scale cleaning vehicle with a sound generating device. Referring to FIG. 5, a frame  12  is supported by a pair of rear wheels  18  and a single front-wheel caster  19 . Rotating brush support plates  13  are attached facing down to the ends of frame  12  and support rotating brush  14 . 
     Referring now also to FIGS. 23 and 24, there is shown large-scale cleaning vehicle  75  with a sound generating device  91 . A fork fitting member  35  is attached to frame  12 . Fork fitting member  35  is able to move around a shaft  89 , which supports front-wheel caster  19 . Fork fitting member  35  comprises a forkfitting section  35   a  and a shaft  89 , which are connected integrally via a connecting section  35   b.    
     An inner wall is disposed inside connecting section  35   b  to form a sound generation chamber. Sound generating device  91 , mounted in connecting section  35   b , comprises a speaker  90  and an audio synthesizer IC or a melody IC. Speaker  90  is fixed so that it points toward a slit disposed on the side wall of connecting section  35   b.    
     A sensor  93  is attached onto fork fitting section  35 . When sensor  93  detects the insertion or removal of the fork, sound generating device  91  is activated and plays back melodies or warnings such as “Now cleaning,” “Please be careful”. 
     The following is a list of advantages of the invention. 
     1. In the large-scale cleaning vehicle according to the present invention, it is possible to rotate rotating brushes, sweeping brushes, and fans without the use of an engine. The large-scale cleaning vehicle is also capable of tight maneuvers. Furthermore, the forklift operator can let out the debris collected in the debris collection box while still in the driver&#39;s seat. Also, the large-scale cleaning vehicle can be operated on uneven ground without damage resulting to the claw on the debris collection box or to the ground. 
     2. Also, if the width of the area to be cleaned is the width in which the large-scale cleaning vehicle can operate, the rotating brushes can be rotated and debris collection can be performed. Furthermore, the angle of the rotating brush support member can be changed so that the width between the rotating brushes is fixed to a prescribed width when collecting debris. 
     3. The rotating brushes can be raised when the large-scale cleaning vehicle is moving while the rotating brushes are not being used, or when the large-scale cleaning vehicle is stationary. Thus, since the ends of the rotating brushes are not in contact with the ground, they will not be deformed and debris collection can be performed over a long period while avoiding wear. 
     4. A foot-lever formed in the shape of a bell crank and the elastic force of a spring can be used to perform one-touch operation of the foot lever simply by kicking it down or up. 
     5. Large-scale trash that could not be removed with conventional large-scale cleaning vehicles can be pushed and removed. Also, when large-scale trash is not dispersed, it can be lifted up, and small-scale trash can be efficiently removed. Furthermore, the ground-contact height of the brush or an elastic plate made from a rubber plate or the like can be freely adjusted according to the unevenness of the ground. 
     6. Because water is sprinkled, the dust from the ground does not rise up, and the debris collection is made more efficient. Also, the operator does not breathe in dust, allowing a healthier environment. The removal of debris adhered to the ground is also made more easy by the sprinkled water. Furthermore, since the rotating brush brushes against the ground when it is wet with water, the ground is cleaned in addition to the debris being collected. 
     7. Cleaning work, which can become monotonous, is made more enjoyable and the cleaning operator&#39;s morale is improved. Also, since the safety of pedestrians is maintained through warnings, the operator can safely concentrate on the cleaning operation. 
     Having described preferred embodiments of the invention with reference to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined in the appended claims.