JPH0569925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a road cleaning device in a road sweeping vehicle equipped with a rotating brush for sweeping along a curb provided on the side of a road surface. It is.

(Prior art) Most of the garbage that falls on the road naturally gathers and accumulates near the curb installation area at the edge of the road. will be removed.

By the way, in conventionally used road cleaning vehicles, a rotating brush for sweeping and a dust collection device (such as a suction device or a scraping device) are fixedly attached to the side of the vehicle.

When performing road cleaning work using such a conventional road sweeping vehicle, the vehicle driver operates the steering wheel to move the cleaning device (rotating brush) along the side of the curb on the road side. It was done by this. Furthermore, at this time,
Correct positioning of the rotating brush relative to the side of the curb is determined by the driver by looking in the rear view mirror.

(Problem to be Solved by the Invention) However, in the conventional road sweeping vehicle described above, in order to move the rotating brush accurately along the side of the curb, it is necessary to move the vehicle a predetermined distance from the side of the curb. The vehicle must be driven parallel to the side of the curb, and the driver must be highly attentive to both general traffic and cleaning work at the same time, and requires a high level of skill to drive. There was a problem. In addition, with this conventional road cleaning vehicle, during cleaning work, even if the vehicle is driven carefully, the vehicle may sometimes meander toward the side of the curb, and in such cases, the rotating brush may touch the side of the vehicle. Since the rotating brush is fixedly attached to the curb, the rotating brush may become separated from the side of the curb (resulting in unswept material) or the rotating brush may be pressed against the side of the curb excessively (there is a risk of damage to the rotating brush). There was also this problem.

In view of the above-mentioned problems with the conventional road sweeping vehicle, the present invention does not require much accuracy in the parallelism of the vehicle running direction to the curb during cleaning work, and moreover, the present invention does not require the parallelism of the vehicle to the curb side. Even when traveling in a meandering manner, the rotating brush can always be brought into contact with the side of the curb with an appropriate posture and pressure, and the rotating brush can automatically follow the side of the curb in this way. The purpose of this invention is to propose a road cleaning device in which the rotating brush does not inadvertently protrude outward in areas where there are no curbs.

(Means for Solving the Problems) The road cleaning device of the present invention is shown in FIGS. 1 to 10.
As illustrated in the figure, in a road cleaning vehicle equipped with a rotating brush 3 for sweeping along a road curb A on a vehicle side 1a, the rotating brush 3 is attached to one end 11b of a support arm 11. and the support arm 11 is attached to the support arm 1.
1 is connected to the vehicle side portion 1a by a drive device 21 fixed to the vehicle 1 side and the drive device 21.
An actuating member 2 that can be moved horizontally outward and outward from the
2, the actuating member 22 of the retracting operation mechanism 2 has a
The support arm 11 is connected in such a manner that it can swing horizontally in and out directions, and the rotary brush 3
The rotary brush attachment side end 11b of the support arm 11 is supported in such a way that it can extend outward in the horizontal direction due to the reaction force generated by friction with the road surface when the rotary brush comes into contact with the road surface while rotating, and When the angle of the support arm 11 with respect to the parallel line L in the longitudinal direction of the vehicle becomes smaller or larger than the appropriate angle range during rotating brush sweeping work, the angle of the support arm 11 outside the appropriate angle range is detected. an arm small angle detection sensor 53 and an arm large angle detection sensor 54, and two front and rear curb detection sensors 51, 5 that detect the presence or absence of a curb A on the road at positions near the front and back of the rotating brush 3, respectively.
2, and both curb detection sensors 51, 5.
2 is detecting the presence of the curb A, and while the arm small angle detection sensor 53 of both the angle detection sensors 53 and 54 is being operated, the signal from the arm small angle detection sensor 53 The drive device 21 of the protruding/retracting operation mechanism 2 is operated in the direction in which the actuating member retracts, and conversely, while the arm large angle detection sensor 54 is being operated, the drive device 21 is operated in the direction in which the actuating member protrudes, and both curb stones are detected. An automatic control mechanism 5 is provided which prevents the drive device 21 from being operated even if the angle detection sensors 53 and 54 are operated when either of the sensors 51 and 52 does not detect the curb A. At the same time, the support arm 11 is disposed between the support arm 11 and the actuating member 22 of the protrusion/retraction operation mechanism 2.
an abutting member 42 which is in a free rotational state relative to the actuating member 22, whose rotation angle range is regulated by a stopper 41 and which is urged by a spring 19 in a direction in which it abuts against the stopper 41;
and both curb stone detection sensors 51 and 5 provided between the abutment member 42 and the support arm 11.
2 are both in the curb detection state, the abutting member 4
2 and the support arm 11 are in a mutually free displacement state, and when either of the two curb stone detection sensors 51, 52 is in a state where a curb is not detected, the abutment member 42 and the support arm 11 are mutually displaced. The present invention is characterized in that it is provided with an arm extension regulating mechanism 4 having a brake device 40 that is operated so as to be irreversibly coupled.

(Function) According to the road surface cleaning device of the present invention, the support arm 11 that can swing horizontally in and out directions is moved to its tip 11b.
The rotating brush 3 is installed in such a way that it protrudes outward from the side of the vehicle when it comes into contact with the road surface while rotating, so that the rotating brush 3 is placed on the road side of the curb A during cleaning work. The rotary brush 3 is positioned in contact with the side surface Aa under moderate pressure (preferably the deflection of the wires of the rotary brush 3 is minimized), and in this state, the rotary brush 3 removes dirt on the road surface by the suction device (or The water will be swept towards the raking device) side. By the way, during cleaning work, the rotating brush 3 is rotated in the direction of arrow R (see FIG. 4) while being tilted forward and outward by a slight angle as shown in FIG. is the chain line 3a in Figure 4.
Only the part surrounded by is in contact with the road surface, and the rotating brush 3
By rotating, the dust on the road surface can be effectively swept toward the suction device Y side. At this time, the rotating brush 3 is subjected to an action of protruding outward as shown by an arrow S due to a reaction force due to friction with the road surface. Furthermore, if the support arm 11 is swingable as described above and is biased outward by the reaction force generated when the rotating brush 3 rotates, the distance between the vehicle 1 and the curb side surface Aa changes. When this happens, the parallel line L in the longitudinal direction of the vehicle (Fig. 4)
The inclination angle θ of the support arm 11 changes with respect to the above-described rotating brush 3 as the inclination angle θ becomes smaller (as the vehicle 1 approaches the curb side surface Aa).
The outward protruding force of the rotary brush 3 tends to become larger, and conversely, as the inclination angle θ becomes larger (the vehicle 1 is separated from the curb side surface Aa), the outward protruding force of the rotating brush 3 tends to become smaller. However, in order to make the rotating brush 3 suitably follow the curb side surface Aa, the pressing force of the rotating brush 3 against the curb side surface Aa must be maintained at a nearly constant pressing force within a range where the deflection of the brush wire is minimized. (i.e. support arm 1
It is important to keep the inclination angle θ with respect to parallel line L in the longitudinal direction of the vehicle (1) constant. The present invention includes angle detection sensors 53 and 54 for respectively detecting when the inclination angle θ of the support arm 11 with respect to the parallel line L in the longitudinal direction of the vehicle becomes smaller or larger than the appropriate angle range; A protrusion/retraction operation mechanism 2 is provided for causing the support arm 11 to protrude and retract from the curb side surface Aa horizontally in and out directions based on signals from the respective angle detection sensors 53 and 54. That is, for example, as shown in (f) in FIG. 10, the vehicle 1 approaches the curb side Aa, and the distance between the vehicle 1 and the curb side Aa becomes smaller (distance N ₁ ).
Then, the rotating brush 3 is pushed toward the vehicle 1 side, and the angle θ between the support arm 11 and the parallel line L in the longitudinal direction of the vehicle becomes smaller, and at this time, the arm small angle detection sensor 5
3 is operated, and in response to a signal from the arm small angle detection sensor 53, the drive device 21 of the retraction operation mechanism 2 retracts the actuating member 22 (to which the support arm is connected) into the inside and outside of the vehicle, and tilts the support arm 11. The angle θ will be automatically operated to fall within the appropriate angle range. Incidentally, when the inclination angle θ of the support arm 1 is corrected within the appropriate angle range, the arm small angle detection sensor 53 is turned off and the retraction operation by the retraction operation mechanism 2 is stopped. Conversely, when the vehicle 1 moves away from the curb side Aa and the distance between the vehicle 1 and the curb side Aa increases (distance N ₂ ), as shown in (G) in FIG. 10, for example, the rotation When the brush 3 is extended outward and the angle θ between the support arm 11 and the parallel line L in the longitudinal direction of the vehicle becomes large, the arm large angle detection sensor 54 is operated and a signal from the arm large angle detection sensor 54 is used. The drive device 21 is automatically operated so that the actuating member 22 projects outward from the vehicle so that the inclination angle θ of the support arm 11 falls within the appropriate angle range. In this case as well, when the inclination angle θ of the support arm 11 is corrected within the appropriate angle range, the arm large angle detection sensor 54 is turned off and the protrusion operation by the protrusion/retraction operation mechanism 2 is stopped.

In addition, in a state where the two curb detection sensors 51 and 52 provided before and after the rotating brush 3 are respectively detecting the curb A, the angle detection sensors 53 and 54 are
However, if either of the two curb detection sensors 51, 52 does not detect a curb, the retraction operation mechanism 2 becomes inactive, and if the support Even if the arm 11 swings until the inclination angle θ operates the angle detection sensors 53 and 54, the rotating brush 3 will not be operated to protrude or retract in or out.

Furthermore, when the rotating brush 3 corresponds to a curbless area as shown in (C) or (D) in FIG. 10, at least one of the two curbstone detection sensors 51 and 52 is in an OFF state. The ejection/retraction operation mechanism 2 is in a non-operating state (locked state), but if this continues, the rotating brush 3 will be in contact with the road surface while rotating, and the support arm 11 will tend to protrude outward. However, both the curb stone detection sensors 51 and 52
If any one of them becomes OFF,
In response to this signal, the brake device 40 of the arm extension regulating mechanism 4 is activated, and the rotation of the abutting member 42 relative to the operating member 22 is restricted by the stopper 41, so that the support arm 11 is tensioned outward. There will be restrictions on releasing it.

Further, when the arm extension regulating mechanism 4 is operated, the abutment member 42 that locks the support arm 11 is held against the stopper 4 by the spring 19.
Since it is only biased in the direction of colliding with 1,
When the rotating brush 3 or the support arm 11 is pressed in the counter-biasing direction, the support arm 11 freely swings inward due to the pressing force.

(Effects of the Invention) Therefore, the road cleaning device for the road cleaning vehicle of the present invention has the following effects.

(1) Support arm 11 supporting rotating brush 3
is installed so that it can swing horizontally in and out from the side of the vehicle and is biased outward by the frictional force of the rotating brush 3 on the road surface. When driving along the curb A, even if the parallelism of the vehicle running direction to the curb A is slightly different (even if the vehicle runs in a slight meandering direction), the rotating brush 3 is always in contact with the curb side Aa. This allows the brush to move forward, and there is no unswept material left by the rotating brush 3.

(2) Even if the distance between the vehicle 1 and the curb side Aa changes slightly, the support arm 11 can
While keeping the inclination angle θ to the parallel line L in the longitudinal direction of the vehicle within the appropriate angle range, move the rotating brush 3 to the side of the curb.
It is possible to automatically follow Aa, and when driving a road sweeping vehicle, the rotating brush 3 can be moved to the side of the curb Aa.
It is possible to reduce the need to pay attention to the steering wheel operation to move the vehicle along the road, making road cleaning work easier. In addition, since the cleaning work is performed while the inclination angle θ of the support arm 11 with respect to the parallel line L in the longitudinal direction of the vehicle is maintained within the appropriate angle range, the outward protrusion of the support arm 11 is almost constant (the rotation brush 3 (The pressure contact force against the curb side surface Aa becomes constant), and the cleaning finish of the road surface becomes uniform and good.

(3) During road cleaning work, when the rotating brush 3 approaches a non-kerbstone area, the arm extension regulating mechanism 4 prevents the support arm 11 from extending outward, so that the above (( Even if the support arm 11 is urged outward as in 1), the rotating brush 3 and the supporting arm 11 will not rotate outward, and the rotating brush 3
Alternatively, the support arm 11 does not collide with a structure on the side of the road (for example, an embedded support such as a road sign) or an abandoned article (for example, a bicycle), thereby improving safety.

(4) When the arm extension regulating mechanism 4 is activated, when the rotating brush 3 presses the support arm 11 in a direction opposite to the urging direction (toward the rear in the vehicle traveling direction), the support arm 11 is freed against the spring 19. Therefore, if the rotating brush 3 or the support arm 11 collides with a structure such as an embedded support when the vehicle 1 is moving forward, the support arm 11 will swing backward. Thus, damage to the cleaning device or structure can be prevented.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 10. In the road cleaning vehicle of this example,
On the left side 1a of the vehicle 1, there is a dust sweeping device It is also possible to use a raking device).

The dust sweeping device X includes a rotating brush 3 attached to the tip 11b of the support arm 11, and a retracting/extracting operation mechanism 2 for retracting and retracting the support arm 11 with the rotary brush 3 from the vehicle side 1a horizontally in and out directions. have.

The protruding/retracting operation mechanism 2 includes a drive device 21 fixed to the vehicle 1 side and an actuating member 22 that is operated to protrude and retract from the vehicle side in horizontal inward and outward directions by the drive device 21. In this embodiment, a hydraulic telescopic cylinder is employed as the drive device 21.

The actuating member 22 has an appropriate length in the vertical direction and is fixed to the rod tip of the telescopic cylinder 21. The operating member 22 is adapted to be moved horizontally outward and outward from the vehicle side portion 1a by the telescoping action of the telescoping cylinder 21.

The support arm 11 has a total of four rods 12,1
2, 13, 13. Each rod 1
2, 12, 13, and 13 are arranged in the form of parallel links that are parallel in plan view and side view, respectively. Also, among the four rods, the two upper and lower rods located on the outside (outer rods) 12, 12
Each end has a vertically long bracket 14, 16, respectively.
The ends of the two upper and lower rods (inner rods) 13, 13 located inside are also connected by vertically long brackets 15, 17, respectively. And these four rods 12, 12,
13, 13, two inner and outer brackets 14, 15 on the rod base end side (vehicle front side) are pivotally connected to the actuating member 22 by shafts 24, 25 at a predetermined distance from each other in the inner and outer directions, and Two inner and outer brackets 16 and 17 on the tip side (rear side of the vehicle)
are pivotally connected to the base plate 32 of the rotating brush 3 by shafts 34 and 35 at a predetermined distance from each other in the inner and outer directions, so that the rods 12, 12, 13, and 13 are parallel in plan view and side view. It is arranged like this. Therefore, this support arm 11 is mounted so that its distal end 11b can swing horizontally inward and outward directions using the shaft support (shafts 24, 25) of the base end 11a of each rod as a fulcrum.

As shown in FIG. 4, the support arm 11 with the rotating brush 3
While the part surrounded by is in contact with the road surface, press the arrow R.
By rotating the support arm 1 in the direction, the support arm 1 is
1 is attached so that it is biased in the direction of protruding outward. The urging force generated at this time is
As will be described later, the strength is preferably such that the rotating brush 3 contacts the curb side surface Aa with an appropriate pressure (pressure to the extent that the brush wire in contact with the curb side surface is slightly bent).

By the way, if the support arm 11 is biased outward in this way, the support arm 11 will continue to move outward until the rotating brush 3 at the tip of the support arm comes into contact with the side surface Aa of the curb A during cleaning work. When the distance between the vehicle 1 and the curb side Aa changes, the support arm 11
The inclination angle θ (FIG. 4) with respect to the parallel line L in the longitudinal direction of the vehicle changes. However, as explained in the section on the effects of the present invention, it is important to maintain the inclination angle θ of the support arm 11 with respect to the parallel line L in the longitudinal direction of the vehicle within an appropriate angle range. The support arm 11 is expanded and contracted by the telescopic cylinder 21 of the operating mechanism 2.
By adjusting the distance between the supporting arm 22 and the curb side surface Aa, the inclination angle θ of the support arm 11 can be maintained within an appropriate angle range.

In this road cleaning device, when the inclination angle θ of the support arm 11 with respect to a parallel line L in the longitudinal direction of the vehicle becomes an angle outside of the appropriate angle range, a signal from an angle detection sensor that detects the angle is sent to cause the appearance and the appearance. The operation mechanism 2 is operated to control the inclination angle θ of the support arm 11 so as to be automatically corrected within an appropriate angle range, and to detect the presence or absence of a curb A at a position near the rotating brush 3 as described later. An automatic control mechanism 5 is provided which can disable the operation of the retractable operating mechanism 2 when the curb A is not present. This automatic control mechanism 5 includes an arm small angle detection sensor 53 and an arm large angle detection sensor 54 that detect when the inclination angle θ of the support arm 11 becomes smaller or larger than the appropriate angle range, and a rotation Two curb detection sensors 51 and 52 are provided at positions near the front and rear of the brush 3, respectively, to detect the presence or absence of a curb A.

In this embodiment, the arm small angle detection sensor 53 and the arm large angle detection sensor 54 each employ a limit switch as shown in FIGS. 3 and 5. These angle detection sensors 53, 54
The outer bracket 1 attaches the outer rods 12, 12 of the support arm 11 as shown in FIG.
The four protruding pieces 14a are arranged so as to sandwich them from both the inside and outside sides. These angle detection sensors 53, 5
4, when the inclination angle θ of the support arm 11 with respect to the parallel line L in the longitudinal direction of the vehicle is within the appropriate angle range (when the support arm 11 is at the position M in FIG. 5), both are in a non-detection state, Also, the support arm 11 swings inward (position _M1 )
When the inclination angle becomes smaller than the appropriate angle range (inclination angle θ ₁ ), it is detected by the arm small angle detection sensor 53, and conversely, the support arm 1
1 swings outward (position M ₂ ) and its inclination angle is larger than the appropriate angle range (inclination angle θ ₂ ).
When it gets old, the arm large angle detection sensor 5
4, it can be detected.

The respective curb detection sensors 51 and 52 are used to confirm whether or not a curb A exists in the vicinity of the front and rear of the rotating brush 3, respectively. In this embodiment, the front curb detection sensor 51 uses ultrasonic A tactile sensor is also used for the rear curb detection sensor 52. Note that this rear curb detection sensor 52
The limit switch 52b is turned on by rotating the lever 52a that contacts the side of the curb.
I try to turn it off.

The angle detection sensors 53, 54 and the curb detection sensors 51, 52 are connected, for example, as shown in FIG. 8. That is, the front and rear curb detection sensors 51 and 52 are connected in series, and the angle detection sensors 53 and 54 are connected in parallel.

In this embodiment, as shown in FIG. 8, the telescopic cylinder 21 of the ejection/retraction operation mechanism 2 transfers pressure oil, which is pumped by a pump 26, to the cylinder tube via an electromagnetic switching valve (3-position, 4-port switching valve) 27. It can be expanded or contracted by supplying it to the expansion side port 21a or the contraction side port 21b.

The automatic control mechanism 5 operates as follows. First, the rotating brush 3 is first
When the vehicle is in each position (A), (E), (F), and (G) in FIG. When the rotating brush 3 approaches the end of the curb A (position (B) in FIG. 10), the front curb detection sensor 51 is OFF and the rear curb detection sensor 52 is ON, and the rotating brush 3 When A is in position (C) (curbless part), both the front and rear curb detection sensors 51 and 52 are turned OFF, and when the rotating brush 3 approaches the starting end of the next curb A from the curbless part (the third At position (d) in Figure 10), the front curb detection sensor 51 is ON and the rear curb detection sensor 52 is OFF. On the other hand, the support arm 11
When the inclination angle with respect to the parallel line in the longitudinal direction of the vehicle is within the appropriate angle range, that is, when the vehicle 1 is in the position (a) in Fig. 10 (distance N between the side of the vehicle and the side of the curb), Both angle detection sensors 53, 5
4 are in the OFF state, and vehicle 1 is in the 1st state.
When approaching the curb A (distance N ₁ ) as shown in position (f) in Figure 0, the support arm 11 is pushed inward and swings inward to the position M ₁ in Figure 5, for example. (tilt angle θ ₁ ), the arm small angle detection sensor 53 is turned ON (the arm large angle detection sensor 54 remains OFF), and the vehicle 1 is further moved as shown in position (G) in FIG. When separated from the curb A (distance N ₂ ), the support arm 11 is extended outward and is swung outward (inclination angle θ ₂ ) to the position M ₂ in FIG. The detection sensor 54 is turned ON (the arm small angle detection sensor 53 remains OFF). As shown in FIG. 8, even if both the front and rear curb detection sensors 51 and 52 are in the ON state (curb detection state), both the angle detection sensors 53 and
54 are in the OFF state (the support arm 11 is within the appropriate angle range), the retraction operation mechanism 2
The electromagnetic switching valve 27 for operating the telescopic cylinder 21 on the side is not energized, so the telescopic cylinder 21 cannot extend or contract, and both curb stone detection sensors 51 and 52 are in the ON state, and the arm small angle detection sensor 5 is in the ON state.
3 is turned ON, the electromagnetic switching valve 27 is activated only while the arm small angle detection sensor 53 is turned ON.
is operated from the neutral position in the direction of arrow C to cause the telescopic cylinder 21 to perform a contraction operation (in the direction of arrow E), and conversely, both curb stone detection sensors 51 and 52 are in the ON state, and the arm large angle detection sensor 54 is operated in the ON state. Only while the arm large angle detection sensor 54 is turned ON, the electromagnetic switching valve 27 is operated from the neutral position in the direction of arrow D, and the telescopic cylinder 21 is extended. As mentioned above, the arm small angle detection sensor 53 is turned on and the telescopic cylinder 2
1 is contracted, the proximal end of the support arm 11 connected to the actuating member 22 is retracted inward, but since the support arm 11 is urged outward, it moves beyond the appropriate angular range. Support arm 1 with a small inclination angle (angle θ ₁ in Fig. 5)
1 within the appropriate angle range (angle θ in FIG. 5), and then the arm small angle detection sensor 53
is turned OFF → the electromagnetic switching valve 27 returns to the neutral position → the telescopic cylinder 21 stops contracting, and the support arm 11 is maintained within the appropriate angle range. Conversely, when the arm large angle detection sensor 54 is turned ON and the telescopic cylinder 21 is extended as described above, the base end side of the support arm 11 connected to the operating member 22 is pushed outward, but the rotation brush 3 is in contact with the curb side surface Aa, the support arm 11, which was at a larger inclination angle (angle θ ₂ in Fig. 5) than the proper angle range, is displaced to within the proper angle range (angle θ in Fig. 5). , then the arm large angle detection sensor 54 turns OFF.
→The electromagnetic switching valve 27 returns to the neutral position →The telescopic cylinder 21 stops extending, and the support arm 11 is maintained within the appropriate angle range. In this way, during cleaning work with the rotating brush 3 along the curb A, the vehicle 1
Even if the supporting arm 11 approaches or separates a little from the curb A, the inclination angle of the support arm 11 can be automatically corrected and maintained within the appropriate angle range.

The actuating member 22 of the retracting operation mechanism 2 and the support arm 1
1 is caused by the friction of the rotating brush 3 with the road surface when the rotating brush 3 approaches the curb-free area (positions (c) and (d) in Fig. 10). An arm extension regulating mechanism 4 is provided for regulating the outward extension operation of the support arm. As shown in FIGS. 6 and 7, this arm extension regulating mechanism 4 has a shaft 24 (relative to the actuating member 22) fixed to a bracket 14 connecting the base ends of the outer rods 12, 12 of the support arm 11. an abutting member 42 loosely fitted in the
It includes a disc 43 and a brake device 40 having a grip portion 44 that can freely come into contact with and separate from the disc 43.

The abutting member 42 is in a freely rotatable state with respect to the shaft 24 and has a stopper 4 provided on the operating member 22 side.
The rotation angle range is regulated by 1. In other embodiments, the stopper 41 may be provided on the abutting member 42 side so that the stopper 41 abuts against the actuating member 22. Moreover, this abutting member 4
2 is biased by a spring 19 in a direction in which the abutting member 42 abuts against a stopper 41 on the operating member 22 side.

The disc 43 of the brake device 40 is attached to the shaft 24
is fixed at the top of the Moreover, the brake device 40
The gripping portion 44 is fixed to the upper surface of the abutment member 42, and in this embodiment, two hydraulic cylinders 45, 45 that can grip the disk 43 from above and below are employed. Each hydraulic cylinder 4 of this gripping part 44
5 and 45 are supplied with pressure oil from the hydraulic pump 26 via an electromagnetic switching valve (3-port, 2-position switching valve) 47, as shown in FIG. This electromagnetic switching valve 47 operates in the direction of arrow G when both the curb stone detection sensors 51 and 52 are in the ON state, so that pressure oil is not supplied to both hydraulic cylinders 45 and 45 (therefore, no brake is applied). state),
Also, when either of the curb stone detection sensors 51, 52 is turned off, it operates in the direction of arrow H (as shown), and pressurized oil is supplied to both the hydraulic cylinders 45, 45, and both the upper and lower push plates 46, 46, the disc 43 is held (braked). When the brake is applied, the grip part 44
When the disc 43 is connected to the abutment member 42 and the support arm 1 via the shaft 24 and the bracket 14,
1 will be integrated.

Therefore, this arm extension regulating mechanism 4 operates as follows. That is, when the vehicle 1 is in the position (a) in FIG.
2 are both ON, and both upper and lower hydraulic cylinders 4
5 and 45 are in a non-braking state as no pressure oil is supplied to them, but when the vehicle 1 is in positions (B), (C) and (D), at least one of both curb stone detection sensors 51 and 52 is turned OFF, pressure oil is supplied to both the upper and lower hydraulic cylinders 45, and the brake state is maintained. In this braking state, support arm 1
1 and the abutting member 42 are integrated, and the abutting member 4
Since the support arm 2 is prevented from rotating in the arm extension direction by the stopper 41, the support arm 1 is prevented from rotating in the arm extension direction even when a frictional force is generated between the rotating brush 3 and the road surface.
1 no longer swings in the direction of protruding outward, and even when the rotating brush 3 corresponds to a curbless area, the rotating brush 3 and the support arm 11
is not projected outward. Incidentally, at this time, the telescopic cylinder 21 on the side of the retraction/extension operation mechanism 2 is also in a locked state, so that troubles such as the rotating brush 3 or the support arm 11 colliding with obstacles on the side of the road can be prevented. There is.
Further, since the support arm 11 and the abutting member 42 are capable of swinging inward against the biasing force of the spring 19, the rotating brush 3 or the support arm 11 can be prevented from hitting some obstacle while the vehicle is moving. If you come into contact with
Alternatively, if the rotating brush 3 collides with the starting end of the curb A from the curb-free area, the support arm 1
1, for example, from the position shown by the solid line in FIG. 7 to the dashed line 11'
As shown, it can freely swing inward against a spring 19. Therefore, even if the rotating brush 3 or the support arm 11 collides with an obstacle while the vehicle is moving, damage to the road cleaning device or the obstacle can be prevented.

Further, in the road surface cleaning device of this embodiment, the suction device Y provided on the rear side of the rotary brush 3 is moved horizontally from the vehicle side 1a to the inside and outside by the telescopic cylinder 61 according to the protruding and retracting state of the rotary brush 3. It has become possible to appear and manipulate. The extension/retraction operation telescopic cylinder 61 of the suction device Y may be automatically extended/contracted in conjunction with the extension/retraction operation of the extension/retraction cylinder 21 of the above-mentioned extension/retraction operation mechanism 2. By operating the suction device Y in such a way that it appears and retracts depending on the distance from the side of the vehicle of the rotating brush 3, the dust swept by the rotating brush 3 can be efficiently sucked into the dust collecting tank 10. You will be able to do this.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a road cleaning vehicle equipped with a road cleaning device according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. The figure is an explanatory diagram of the operation of the road cleaning device shown in FIG. 1, FIG. 5 is a cross-sectional view of FIG. 3, FIG. 6 is a view taken in the direction of FIG. Fig. 8 is a diagram showing the electric circuit and hydraulic circuit of the road cleaning device in Fig. 1, Fig. 9 is a state change diagram in Fig. 2, and Fig. 10 is a diagram showing the state change in Fig. 1. FIG. 3 is an explanatory diagram of the operation during cleaning work in the road cleaning vehicle. DESCRIPTION OF SYMBOLS 1...Vehicle, 1a...Vehicle side part, 2...Protrusion/retraction operation mechanism, 3...Rotating brush, 4...Arm extension regulation mechanism, 5...Automatic control mechanism, 11...Support arm, 11a...Base End, 11b...Tip, 19
... Spring, 21 ... Drive device (telescopic cylinder), 22 ... Actuation member, 40 ... Brake device,
41...Stopper, 42...Abutting member, 51...
...Front curb stone detection sensor, 52...Rear curb detection sensor, 53...Arm small angle detection sensor, 54...
...Arm large angle detection sensor, A...Curb, Aa...
...curb side.

Claims (1)

[Claims] 1. In a road cleaning vehicle equipped with a rotating brush 3 for sweeping along a road curb A on a vehicle side 1a, the rotating brush 3 is attached to one end 11b of a support arm 11, and The arm 11 has the other end 11a of the support arm 11, a drive device 21 fixed to the vehicle 1 side, and an actuating member 22 that is caused to protrude and retract from the vehicle side portion 1a horizontally in and out directions by the drive device 21. The supporting arm 1 is attached to the operating member 22 of the retracting/extracting operation mechanism 2.
1 are connected in such a manner that they can swing horizontally in and out directions, and when the rotary brush 3 comes into contact with the road surface while rotating, the support arm 11 is moved by the reaction force generated by the friction with the road surface. The rotary brush mounting side end 11b is supported so as to be able to protrude outward in the horizontal direction, and the angle of the support arm 11 with respect to a parallel line L in the longitudinal direction of the vehicle is smaller than the appropriate angle range during sweeping work using the rotary brush. An arm small angle detection sensor 53 and an arm large angle detection sensor 54 that respectively detect the angle of the support arm 11 that is outside the appropriate angle range when the angle or the large angle becomes large; Two front and rear curb detection sensors 51 and 52 detect the presence or absence of a curb A on the road.
and both curb detection sensors 51, 52.
While the arm small angle detection sensor 53 of both the angle detection sensors 53 and 54 is being operated in a state in which the presence of the curb A is being detected, the signal from the arm small angle detection sensor 53 is used to detect the presence of the curb A. The drive device 21 of the retracting operation mechanism 2 is operated in the retracting direction of the actuating member, and the arm large angle detection sensor 5 is operated in the opposite direction.
4 is operated, the drive device 2
1 in the direction in which the actuating member protrudes, and neither of the curb detection sensors 51 and 52 detects the curb A, even if the angle detection sensors 53 and 54 are operated, the drive device 21 An automatic control mechanism 5 is provided between the support arm 11 and the actuating member 22 of the protruding/retracting operation mechanism 2 so that the actuating member is free to rotate relative to the support arm 11 and is not operated. 22, the rotation angle range of which is regulated by a stopper 41, and the abutment member 4 is urged by a spring 19 in a direction to abut against the stopper 41.
2, the both curb stone detection sensors 51, which are provided between the abutment member 42 and the support arm 11;
When both of the curb detection sensors 51 and 52 are in the curb detection state, the abutment member 42 and the support arm 11 are in a mutually free displacement state, and when either of the two curb detection sensors 51, 52 is in the curb non-detection state, an impact is detected. A road cleaning device for a road cleaning vehicle, characterized in that an arm extension regulating mechanism 4 is provided having a brake device 40 that is operated to connect a mating member 42 and a support arm 11 in a manner that they cannot be displaced from each other.