JP5825350B2 - Dust collection device - Google Patents

Description

  The present invention relates to a dust collecting device mounted on a rear portion of a road cleaning vehicle, and more particularly to a dust collecting device configured to sweep up and collect dust on a road surface with a main brush.

  2. Description of the Related Art Some conventional road surface cleaning vehicles include a dust collecting device that has a main brush that is arranged at the rear of a vehicle and configured to sweep dust on the road surface forward of the vehicle. In this type of road cleaning vehicle, a hopper is disposed on a chassis in front of the dust collecting device, and the dust collected from the road by the dust collecting device is stored in the hopper.

  FIG. 7 is a side view showing a rear portion of a conventional road cleaning vehicle. The road cleaning vehicle has a configuration in which the dust collecting device 100 is moved up and down by a parallel link 101 and a fluid pressure cylinder 102. FIG. 7 shows a state in which the dust collecting device 100 is raised and the main brush 103 is separated from the road surface R. This is a state when the road cleaning vehicle is forwarded without cleaning. .

  In the conventional road surface cleaning vehicle shown in FIG. 7, the shaft 104 of the main brush 103 is connected to one end of the main brush arm 105, and the other end of the main brush arm 105 is fixed to the chassis 106 of the vehicle. It is connected so that it can rotate with respect to the member.

JP 2002-194719 A JP 2010-112123 A

  FIG. 8 is a view showing a state in which the road surface R is being cleaned by the conventional road cleaning vehicle shown in FIG.

  FIG. 8A shows a state where the flat road surface R is being cleaned. The dust swept forward by the main brush 103 is thrown into the entrance of the conveyor mechanism 107 and is moved upward by the conveyor mechanism 107. Be transported. A difference in height between the pulley rotation axis of the conveyor mechanism 107 and the rotation axis of the main brush 103 when the flat road surface R is cleaned is denoted by A. When cleaning the flat road surface R, the height difference A is generally maintained, so that the dust swept up by the main brush 103 is appropriately put into the inlet portion of the conveyor mechanism 107.

  However, if the road surface R is uneven, there is a possibility that the dust on the road surface R cannot be sufficiently collected. That is, in the conventional dust collection device, the main brush 103 is supported so as to be swingable with respect to the vehicle, while the conveyor mechanism 107 is fixed with respect to the vehicle. The vertical positional relationship between the main brush 103 and the conveyor mechanism 107 changes greatly. For this reason, the situation where the dust swept up by the main brush 103 does not fully enter the inlet portion of the conveyor mechanism 107 occurs.

  For example, if there is a recess in the road surface R as shown in FIG. 8B, only the main brush 103 supported so as to be able to swing is lowered according to the height of the road surface R. The vertical position of 107 does not change. As a result, the entrance portion of the conveyor mechanism 107 is positioned higher than usual with respect to the main brush 103, and the dust swept up by the main brush 103 does not reach the entrance portion of the conveyor mechanism 107 sufficiently.

  If the height difference between the pulley rotation axis of the conveyor mechanism 107 and the rotation axis of the main brush 103 at this time is B, the height difference B () is higher than the height difference A in the case of the flat road surface shown in FIG. FIG. 8B is smaller.

  Also, as shown in FIG. 8 (c), when there is a convex portion on the road surface R, only the main brush 103 supported so as to be able to swing rises according to the height of the road surface, while the conveyor mechanism The vertical position of 107 does not change. As a result, the entrance portion of the conveyor mechanism 107 is positioned lower than normal with respect to the main brush 103, and the dust swept up by the main brush 103 is not sufficiently put into the entrance portion of the conveyor mechanism 107. End up. Further, the bottom of the conveyor mechanism 107 may interfere with the road surface R.

  If the height difference between the pulley rotation axis of the conveyor mechanism 107 and the rotation axis of the main brush 103 at this time is C, the height difference C () is higher than the height difference A in the case of the flat road surface shown in FIG. FIG. 8 (c)) is larger.

  As described above, in the conventional dust collection device, the positional relationship in the vertical direction between the main brush 103 and the conveyor mechanism 107 may greatly change due to the presence of the unevenness on the road surface R, and thus the dust can be sufficiently collected. There was no case.

  The present invention has been made in view of the above-described problems in the prior art, and an object of the present invention is to provide a dust collecting apparatus that can perform a cleaning operation without any trouble even on uneven road surfaces.

  In order to solve the above-mentioned problems, the present invention is a dust collecting device disposed at the rear of a road cleaning vehicle, and is configured to sweep up dust on the road surface, which is attached to the main body frame and the main body frame. A main brush, a dust transport mechanism for transporting the dust swept up by the main brush to a hopper inlet provided in the road surface cleaning vehicle, and the main body frame attached to the main surface and contacting the road surface during cleaning. Frame support means for supporting the main body frame and frame connection means for connecting the main body frame to the vehicle so as to be swingable about an axis extending in the vehicle width direction.

  Preferably, the frame support means includes wheels that roll on a road surface during cleaning.

  Preferably, the wheel is mounted to be rotatable around a vertical axis.

  Preferably, the main brush arm further includes a main brush arm configured to connect the main brush to the main body frame, and the main brush arm includes one end portion supporting the shaft of the main brush, and the main body. And the other end portion rotatably connected to the frame around an axis in the vehicle width direction.

  Preferably, the frame connecting means includes a pair of left and right shaft members extending from the main body frame along an axis extending in the vehicle width direction.

  Preferably, the dust transport mechanism includes a primary conveyor that transports the dust swept up by the main brush upward, and a secondary conveyor that throws the dust transported upward by the primary conveyor into the inlet of the hopper. The dust collection device further includes an integrated cover that covers both the primary conveyor and the secondary conveyor, and a pivot point for opening and closing the cover is disposed at the upper part of the secondary conveyor. Has been.

  Preferably, a wall member that forms a transport path of the secondary conveyor is provided on the inner surface of the cover.

The side view which showed the road surface cleaning vehicle with which the dust collection apparatus by one Embodiment of this invention was mounted | worn. The partial cross section figure of the dust collection | recovery apparatus of the road surface cleaning vehicle shown in FIG. FIG. 2 is a perspective view of the dust collection device of the road sweeper shown in FIG. The perspective view which showed the main body flame | frame etc. of the dust collection apparatus of the road surface cleaning vehicle shown in FIG. It is the figure which showed the state at the time of cleaning of the dust collection apparatus of the road cleaning vehicle shown in FIG. 1, (a) when a road surface is flat, (b) when a recessed part exists in a road surface, (c) is The case where a convex part exists on a road surface is shown, respectively. It is the figure which showed the opening-and-closing state of the cover of the dust collection apparatus of the road cleaning vehicle shown in FIG. 1, (a) is the state at the time of closing, (b) has shown the state at the time of opening (b), respectively. The side view which showed the rear part of the conventional road surface cleaning vehicle. It is the figure which showed the state at the time of cleaning of the dust collection | recovery apparatus of the road surface cleaning vehicle shown in FIG. 7, (a) is when a road surface is flat, (b) is when a recessed part exists in a road surface, (c) is The case where a convex part exists on a road surface is shown, respectively.

  Hereinafter, a road cleaning vehicle including a dust collection device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the road cleaning vehicle includes a chassis 3 supported by front wheels 1 and rear wheels 2, and dust collected from the road surface R is stored on the chassis 3. A hopper 4 configured as described above is provided. Between the front wheel 1 and the rear wheel 2, a side brush 5 that sweeps dust and the like on the road surface R toward the center in the vehicle width direction is provided.

  As shown in FIG. 1, a dust collection device 6 according to this embodiment is provided behind the rear wheel 2 of the road cleaning vehicle. As shown in FIGS. 2 and 3, the dust collecting device 6 includes a main body frame 7. The main body frame 7 is configured to sweep dust on the road surface R forward of the vehicle. A brush 8 and a dust transport mechanism 9 that transports the dust swept up by the main brush 8 to the inlet of the hopper 4 are mounted.

  Further, the dust collecting device 6 can swing around a pair of left and right wheels (frame support means) 10 that contacts the road surface R and supports the main body frame 7 during cleaning and an axis that extends the main body frame 7 in the vehicle width direction. And a pair of left and right shaft members (frame connection means) 11 connected to the vehicle. The wheel 10 is provided on the main body frame 7 so as to be rotatable around a vertical axis. The pair of left and right shaft members 11 extend from the main body frame 7 in the vehicle width direction (left and right direction) (FIG. 3).

  In the dust collecting device 6, the shaft 12 of the main brush 8 is supported by one end of each of the pair of left and right main brush arms 13, and the other end of each main brush arm 13 is connected to the dust collecting device. 6 is supported so as to be rotatable about an axis extending in the vehicle width direction.

  The dust transport mechanism 9 includes a pulley 14 and a conveyor belt 15 stretched over the pulley 14, and a plurality of conveyor paddles 16 are provided on the conveyor belt 15 to carry the dust and transport it upward to the inlet of the hopper 4. ing.

  A first end 18 of each of the pair of left and right lift arms 17 shown in FIG. 4 is rotatably connected to the hopper 4 shown in FIG. 1, and a second end of each lift arm 17 is connected. 19 is rotatably connected to the shaft member 11 of the dust collection device 6. A pressing portion 20 is provided between the first end portion 18 and the second end portion 19 of the lift arm 17. The lift arm 17 has a distal end portion including the first end 18 bent in a substantially L shape, and the pressing portion 20 protrudes upward.

  At the lower position of the pressing portion 20, the tip end portions of the pistons 22 of a pair of left and right fluid pressure cylinders 21 including hydraulic cylinders and the like are rotatably connected to the lift arm 17. The base end portion 24 of the cylinder main body 23 of the fluid pressure cylinder 21 is rotatably connected to the chassis 3 of the road sweeper.

  As shown in FIG. 1, the base end portion 26 of the pair of left and right lift frames 25 is rotatably connected to the hopper 4. As shown in FIG. 4, the first end 18 of the lift arm 17 and the base end 26 of the lift frame 25 are connected to the hopper 4 so as to have a common rotation axis 27.

  The lift frame 25 includes a frame upper portion 29 including a pressed portion 28 that is pressed from below by the pressing portion 20 of the lift arm 17 and a lift guide that a part of the dust collecting device 6 lifted by the lift arm 17 comes into contact with the lift frame 25. And a frame lower part 31 including a part (contact part) 30.

  The fluid pressure cylinder 21 is moved up and down by rotating the lift arm 17 by moving the piston 22 forward and backward. Specifically, the cleaning position where the main brush 8 contacts the road surface R, the forward position where the lift arm 17 is raised together with the dust collecting device 6 until the pressing portion 20 contacts the pressed portion 28, and the lifting arm 17 The position of the lift arm 17 is changed between the position when the dust is discharged and the dust collecting device 6 is further lifted together with the lift frame 25.

  When the pressing portion 20 of the lift arm 17 comes into contact with the pressed portion 28 of the lift frame 25, a limit switch (not shown) is activated, and the pumping of the working fluid (hydraulic oil) to the fluid pressure cylinder 21 is stopped. At this time, the flow path of the working fluid is closed by a valve, and the holding force of the fluid pressure cylinder 21 is maintained. The fluid pressure cylinder 21 and the limit switch constitute the raising / lowering drive means in this embodiment.

  The lifting guide portion 30 of the lift frame 25 guides the lifting operation of the dust collecting device 6 that moves simultaneously when the lift arm 17 moves between the cleaning position and the forwarding position. Specifically, as shown in FIG. 4, when the lift arm 17 moves from the cleaning position to the forwarding position, the lifting guide section 30 moves the dust collection device 6 backward as the lift arm 17 moves up. Thus, the inclined guide surface 32 inclined and the vertical guide surface 33 formed following the inclined guide surface 32 and extending in the vertical direction are included. The raising / lowering guide part 30 is mounted | worn with respect to the main body of the lift frame 25 so that replacement | exchange is possible.

  The dust collection device 6 includes a rolling roller (regulation member) 34 that moves while contacting the lifting guide portion 30 of the lift frame 25 and regulates the operation of the dust collection device 6 (FIGS. 2 and 3).

  Next, with reference to FIG. 5, the operation | movement at the time of cleaning of the dust collection apparatus 6 of the road surface cleaning vehicle by this embodiment is demonstrated.

  FIG. 5A shows a state where the flat road surface R is being cleaned. The dust swept forward by the main brush 8 is thrown into the inlet portion of the conveyor mechanism 9 and is moved upward by the conveyor mechanism 9. It is conveyed to. A level difference between the pulley rotation axis of the conveyor mechanism 9 and the rotation axis of the main brush 8 when the flat road surface R is cleaned is A. In this height difference A, the dust swept up by the main brush 8 is appropriately put into the entrance of the conveyor mechanism 9.

  FIG. 5B shows a case where there is a recess on the road surface R, and the main brush 8 is supported by a swingable main brush arm 13, so that the main brush 8 has a main surface corresponding to the height of the recess on the road surface R. The brush 8 descends.

  In the present embodiment, the main body frame 7 of the dust collecting device 6 is supported by the wheels 10 and the main body frame 7 is connected to the vehicle so as to be swingable around the rotation axis 27. For this reason, the wheel 10 descends according to the height of the concave portion of the road surface R, and at the same time, the main body frame 7 descends together with the dust transport mechanism 9. That is, in the dust collecting apparatus 6 according to the present embodiment, not only the main brush 8 but also the dust transport mechanism 9 is displaced in the vertical direction following the unevenness of the road surface R.

  Therefore, even when there is a recess on the road surface R, the height difference B (FIG. 5B) between the rotation axis of the pulley 14 of the dust transport mechanism 9 and the rotation axis of the main brush 8 is the same as when the road surface R is flat. There is no significant deviation from the height difference A (FIG. 5A). As a result, the dust swept up by the main brush 8 is sufficiently put into the entrance of the dust transport mechanism 9.

  FIG. 5C shows a case where a convex portion is present on the road surface R, and the main brush 8 is supported by a swingable main brush arm 13, so that depending on the height of the concave portion of the road surface R. The main brush 8 rises.

  As described above, in the present embodiment, the main body frame 7 of the dust collecting device 6 is supported by the wheels 10, and the main body frame 7 is swingably connected to the vehicle around the rotation axis 27. Therefore, the wheel 10 rises according to the height of the convex portion of the road surface R, and at the same time, the main body frame 7 rises together with the dust transport mechanism 9.

  Therefore, even when there is a convex portion on the road surface R, the height difference C (FIG. 5C) between the rotation axis of the pulley 14 of the dust transport mechanism 9 and the rotation axis of the main brush 8 is the case where the road surface R is flat. There is no significant deviation from the height difference A (FIG. 5A). As a result, the dust swept up by the main brush 8 is sufficiently put into the entrance of the dust transport mechanism 9.

  As described above, according to the dust collection device 6 of the road cleaning vehicle according to the present embodiment, the vertical positional relationship between the main brush 8 and the dust transport mechanism 9 can be maintained substantially constant even when the road surface R is uneven. Therefore, the dust swept up by the main brush 8 is sufficiently thrown into the entrance of the dust transport mechanism 9, and stable cleaning performance can be ensured.

  In addition, the main brush arm 13 that supports the main brush 8 is pivotally connected to the frame body 7 of the dust collecting device 6 instead of the vehicle side. The positional relationship can be more reliably maintained substantially constant.

  Next, with reference to FIG. 6, the cover 35 which is the other characteristic of the dust collection apparatus 6 by this embodiment is demonstrated.

  As shown in FIG. 6, the dust transport mechanism 9 is a two-stage conveyor device, and is transported upward by the primary conveyor 9 </ b> A that transports the dust swept up by the main brush 8 upward, and the primary conveyor 9 </ b> A. A secondary conveyor 9 </ b> B that puts dust into the inlet of the hopper 4.

  The dust collection device 6 has an integrated cover 35 that covers both the primary conveyor 9A and the secondary conveyor 9B, and a pivot point 36 for opening and closing the cover 35 is disposed on the upper side of the secondary conveyor 9B.

  A wall member (paddle cover) 37 that forms a conveyance path of the secondary conveyor 9 </ b> B is provided on the inner surface of the cover 35.

  As described above, in the dust collection device 6 according to the present embodiment, inspection and maintenance are facilitated by integrating the covers of the primary conveyor 9A and the secondary conveyor 9B so that they can be opened simultaneously.

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Chassis 4 Hopper 6 Dust collection apparatus 7 Main body frame of dust collection apparatus 8 Main brush of dust collection apparatus 9 Dust conveyance mechanism of dust collection apparatus 9A Primary conveyor of dust conveyance mechanism 9B Secondary conveyor of dust conveyance mechanism 10 Wheel (frame support means)
11 Shaft member (frame connection means)
12 Main brush shaft 13 Main brush arm 17 Lift arm 35 Dust collection device cover 36 Cover pivot point 37 Secondary conveyor wall member (paddle cover)

Claims (6)

In the dust collection device placed at the rear of the road sweeper,
Body frame,
A main brush mounted on the body frame and configured to sweep dust on the road surface forward of the vehicle;
A dust transport mechanism for transporting the dust swept up by the main brush to a hopper inlet provided in the road cleaning vehicle;
Frame support means mounted on the body frame and supporting the body frame in contact with the road surface during cleaning;
Frame connecting means for connecting the main body frame to the vehicle so as to be swingable around an axis extending in the vehicle width direction;
Equipped with a,
The dust transport mechanism includes a primary conveyor that transports the dust swept up by the main brush upward, and a secondary conveyor that throws the dust transported upward by the primary conveyor into the inlet of the hopper,
The dust collecting apparatus further includes an integrated cover that covers both the primary conveyor and the secondary conveyor, and a pivot point for opening and closing the cover is disposed on the upper part of the secondary conveyor.
A dust collecting device characterized by that.   The dust collection device according to claim 1, wherein the frame support means includes a wheel that rolls on a road surface during cleaning.   The dust collection device according to claim 2, wherein the wheel is rotatably mounted around a vertical axis.   The main brush arm further includes a main brush arm configured to connect the main brush to the main body frame, and the main brush arm has one end portion supporting the shaft of the main brush and the main body frame in the vehicle width direction. 4. The dust collection device according to claim 1, further comprising: the other end portion that is rotatably connected around the axis line.   5. The dust collection device according to claim 1, wherein the frame connection unit includes a pair of left and right shaft members extending from the main body frame along an axis extending in the vehicle width direction. The dust collection device according to any one of claims 1 to 5 , wherein a wall member that forms a conveyance path of the secondary conveyor is provided on an inner surface of the cover.

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