JPH0860628A - Sweeping device of cleaning car for road face - Google Patents

Abstract

PURPOSE: To provide a sweeping device in which a guide plate is automatically positioned close to the center of a cleaning brush when it has worn off, so as to always get in contact with the peripheral face of cleaning brush with the changed diameter due to the abrasion. CONSTITUTION: A member 35 engaging with the intermediate cam groove 32 of a cam arm 27 is provided at the front end of a support arm 3. A connection arm 26 of a frame body 21 is connected to the lower end of the cam arm 27. The cam shape of the intermediate cam groove 32 is designed so as to swing the cam arm 27 and reciprocate the frame body 21 back and forth by the cam engagement of the member 35 and the intermediate cam groove 32 by the vertical movement of the support arm 3 resulting from the change of outer diameter of the cleaning brush 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sweeping device for a road cleaning vehicle that prevents dust swept up by a sweeping brush from scattering behind the sweeping brush.

[0002]

2. Description of the Related Art A conventional sweeping device for a road cleaning vehicle is disclosed in Japanese Utility Model Publication No. Sho 60-29461 by the applicant of the present invention, which can be grounded on the left and right support arms pivotally mounted on the vehicle body. A sweeping brush is rotatably supported, a flexible dustproof flap covering the rear of this sweeping brush is hung on the vehicle body, and a guide plate for contacting the sweeping brush is provided under the dustproof flap. The left and right arms of this frame are connected to the left and right connecting arms that are pin-connected to the side plate of the dirt shoe arranged on the side of the sweeping brush so that the position can be adjusted. Of the dust etc. swept up by the upper brush,
The dust-proof flap catches what has adhered to the sweeping brush and has been carried in the sweeping direction (front) and in the opposite direction (rearward), and then this dust is swept up with the guide plate that contacts the lower peripheral surface of the sweeping brush. It was sent between the brushes and again swept forward by a sweeping brush.

[0003]

By the way, when the sweeping brush wears and its outer diameter becomes small due to long-term use of the sweeping device, the guide plate is separated from the circumferential surface of the sweeping brush.
The dust carried to the rear cannot be collected by the guide plate. Therefore, conventionally, when the sweeping brush is worn out, an operator must adjust the connecting position between the left and right arm portions of the frame and the left and right connecting arms to bring the guide plate into contact with the sweeping brush circumferential surface. Such complicated adjustment work was necessary.

[0004]

In order to solve the above problems, the present invention rotatably supports a sweeping brush, which can be grounded, on left and right support arms pivotally mounted on a vehicle body, and covers the rear of the sweeping brush. In the sweeping device for a road cleaning vehicle, a flexible dustproof flap is hung on a vehicle body, and a frame body having a guide plate for contacting a sweeping brush is attached to a lower portion of the dustproof flap. And the left and right ends of the frame body are linked by a movement transmission mechanism that converts the vertical swing of the support arm due to the change in the outer diameter of the sweeping brush to the longitudinal movement of the frame body, and guides according to the wear of the sweeping brush. It is characterized in that the plate is made to approach the center of the sweeping brush.

[0005]

When the sweeping brush wears and its outer diameter becomes smaller, the supporting arm swings downward, and this swinging is converted into forward movement of the guide plate by the movement transmission mechanism, and automatically. The guide plate moves toward the center of the sweep brush.

[0006]

Embodiments Next, embodiments will be described with reference to the drawings. As shown in FIG. 1, one end of each of left and right support arms 3 is pivotally attached to left and right attachment plates 2 attached to both sides of a rear portion of a vehicle body 1, respectively. A support portion 4 is formed at the other ends of the left and right support arms 3 and 3, and a sweeping brush 5 is rotatably supported between the left and right support portions 4 and 4 (shown in FIG. 2). The sweeping brush 5 is connected to a hydraulic motor 6 fixed to one supporting portion 4 at one shaft end thereof, and is rotated at a high speed in a direction of an arrow shown in the drawing.
The other end of the chain 7 whose one end is connected to the tip of a piston rod of a hydraulic cylinder (not shown) is connected to the intermediate portion of one support arm 3, and the left and right support arms 3 and 3 are operated by the action of the hydraulic cylinder. Is swung up and down, and the sweeping brush 5 moves between a cleaning position A (FIGS. 1 and 3) that contacts the road surface and a storage position B (FIG. 4) that is separated from the road surface.

Reference numeral 11 denotes a dust collecting conveyor arranged in front of the sweeping brush 5 which is freely grounded as described above. This conveyor 11 is carried upward by the orbiting push-up plate 12 for dust on the road surface swept up by the sweeping brush 5, and is thrown into a hopper (not shown) provided in the upper portion of the vehicle body 1 for recovery. Has become. Further, 13 is a groundable dirt shoe arranged on both sides of the conveyor 11 and the sweeping brush 5. This dirt shoe 13 has a conveyor 11
A shielding plate 14 that shields the gap between the cleaning brush 5 and the sweeping brush 5 is attached. Also, the dirt shoe 13 and the shield plate 1
Reference numeral 4 is connected to the left and right support arms 3 and 3 via a chain 15, and the shield plate 14 is connected to a side plate of the conveyor 11 via a swing link 16. Therefore,
During the cleaning work, as shown in FIGS.
Is grounded on the road surface, and during forwarding, as shown in FIG. 4, in conjunction with the upward movement of the support arm 3, holds the dirt shoe 13 at the storage position B separated from the road surface. The sweeping brush 5 is attached to the bumper 18 at the rear of the vehicle body 1.
A bendable flexible dustproof flap 19 such as a rubber plate having a width in the left-right direction slightly larger than the axial length thereof is hung, and the dustproof flap 19 covers the rear of the sweeping brush 5. At the lower end of this dust flap 19,
A frame body 21 having connecting arms 26 at both left and right ends and having a U-shape as a whole is attached as shown in FIG. 2, and a flexible guide such as a rubber plate is provided on the upper surface of the frame body 21. A plate 22 is attached. The widths of the frame 21 and the guide plate 22 in the left-right direction are set to be slightly longer than the axial length of the sweeping brush 5 in the same manner as the dustproof flap 19.

Next, the left and right support arms 3, 3 and the frame 21
The movement transmission mechanism 25 that connects the and will be described. The front ends of the connecting arms 26 extending to the front of the left and right ends of the frame body 21 are pivotally attached to the lower ends of the cam arms 27. The upper middle portion of the upper end of the cam arm 27 is attached to the mounting plate 24 of the vehicle body 1.
The lower end of the connecting arm 28 rotatably supported by the pin is pin-connected. Further, as shown in FIGS. 1 and 3, the free end portion of the connecting arm 28 is restricted from swinging clockwise by a stopper member 29 fixed to the vehicle body 1. The cam arm 27 is formed with a cam groove 34 including an upper cam groove 31, an intermediate cam groove 32 and a lower cam groove 33. Further, the left and right support arms 3 and 3 are provided at the tips of the support portions 4 and 4 with an engaging member 35 that engages with the cam groove 34.
Is provided. As shown in FIG. 1, when the sweeping brush 5 is new, the engaging member 35 is located at the connection point between the upper cam groove 31 and the intermediate cam groove 32, and as shown in FIG. The engaging member 35 is set so as to be located at the connection point between the intermediate cam groove 32 and the lower cam groove 33 when the wear of the intermediate cam groove 32 reaches the time of replacement. In addition, the intermediate cam groove 32
When the outer diameter of the cam arm is reduced due to wear of the sweeping brush 5, the support arm 3 swings downward, and the engagement member 35 of the support arm 3 and the intermediate cam groove 32 are engaged with each other. 27 rotates clockwise around the pivot point of the connection arm 28, the guide plate 22 approaches the center of the sweeping brush 5, and comes into contact with the circumferential surface of the sweeping brush 5 having a smaller outer diameter. It is set. Furthermore, the upper cam groove 31
The cam shape of the lower cam groove 33 and the lower cam groove 33 allow the engaging member 35 to freely move up and down even if the sweeping brush 5 moves up and down due to the unevenness when the road cleaning vehicle performs the cleaning work on the rough road.
Moreover, the guide plate 22 is set so as not to move back and forth. Further, as shown in FIG. 3, when the chain 7 is pulled up by the action of the hydraulic cylinder and the support arm 3 is swung upward to position the sweeping brush 5 at the storage position B as described above, the engaging member 35 is The cam arm 27 is engaged with the upper end of the upper cam groove 31 and the cam arm 27 is pulled upward, so that the dustproof flap 19 is bent and the guide plate 22 and the frame body 21 are positioned at the storage position B.

Next, the operation of the road cleaning vehicle configured as described above will be described. First, as shown in FIG. 1, when the sweeping brush 5 is new, the sweeping brush 5 and the dirt shoe 13 are grounded on the road surface, and the sweeping brush 5 is moved forward while rotating at high speed in the arrow direction. , A gutter brush (not shown) on the front of the vehicle body 1 collects dust scattered on the road surface in the central portion of the vehicle body 1, and further, the collected brushes of dust on the rear surface of the vehicle body 1 are rotating. Sweep up toward the conveyor 11. As a result, most of the dust that has been swept up is transferred to the circulating conveyor 11, is carried upward by the push-up plate 12, and is thrown into a not-shown accommodating portion provided in the upper portion of the vehicle body 1 to be collected. On the other hand, a part of dusts (particularly sand dust) adheres to the sweeping brush 5 by this sweeping, is carried to the rear of the sweeping brush 5, and the dust that floats up at the sweeping brush 5 also rotates at high speed. Similarly, the guide plate 22 and the sweeping brush, which are carried by the accompanying air current generated on the outer periphery of the upper brush 5 and are similarly conveyed rearward, are received by the rear plate and the dustproof flap 19 (not shown) and are in contact with the lower rear of the circumferential surface of the sweeping brush 5, The cleaning brush 5 is fed into the space 5 and is swept forward by the sweeping brush 5 which rotates at high speed again.

When the cleaning brush 5 is continuously worn and the outer diameter thereof is reduced, the left and right support arms 3 and 3 are swung downward and the engaging member 35 is moved to the intermediate cam groove 3.
Engage with 2. Then, by this engagement, the cam arm 2
7 is rotated clockwise about an axial fulcrum with the connecting arm 28 whose upper end is in contact with the stopper member 29,
Frame 2 connected to the cam arm 27 via the connecting arm 26
1 and the guide plate 22 move forward to approach the center of the sweeping brush 5. Therefore, even if the sweeping brush 5 is worn, the guide plate 22 is always kept in a state where its tip is in contact with the outer circumference of the sweeping brush 5. Also, from when the sweeping brush 5 is new to when it is replaced,
The engaging member 35 is in a state of being engaged with the intermediate cam groove 32. At this time, the road surface to be cleaned is a bad road, and the unevenness of the road surface causes the left and right support arms 3, 3 to move up and down together with the sweeping brush 5. However, since the engagement member 35 can move via the upper cam groove 31 or the lower cam groove 33, an unreasonable force is not applied to the support arms 3 and 3.

Next, when the cleaning is completed and the transfer is carried out, as shown in FIG. 4, the hydraulic cylinder is operated to pull up the chain 7 and swing the left and right support arms 3 and 3 upward to move together with the sweeping brush 5. Store the dirt shoe 13 at the upper storage position B.
Lift towards. Then, the engaging member 35 of the support arm 3 engages with the upper end of the upper cam groove 31 to be engaged with the cam arm 2.
7 is lifted, and the connecting arm 28 rotates counterclockwise about the pivot point of the vehicle body 1. Then, the guide plate 22 together with the frame body 21 connected to the cam arm 27 via the connecting arm 26 is lifted toward the upper storage position B.

As described above, in the sweeping device of the present embodiment, the dust and the like attached to the sweeping brush 5 and carried to the rear of the sweeping brush 5 are returned to the sweeping brush 5 by the dustproof flap 19 and the guide plate 22. Since the sweeping brush 5 is swept forward, dust such as sand dust does not scatter on the road surface immediately after cleaning that the sweeping brush 5 has passed, or fall and remain unswept. In addition, when the outer diameter of the sweeping brush 5 becomes smaller due to the wear of the sweeping brush 5, the swinging of the support arm 3 downward is prevented by the engaging member 35.
The engagement of the cam arm 27 with the intermediate cam groove 32 causes the guide plate 22 to move toward the center of the sweeping brush 5 by the swing of the cam arm 27. The guide plate 22 can be automatically brought into contact with the peripheral surface of the sweeping brush 5 whose outer diameter has changed, without the need to adjust the mounting position of the guide plate 22 by. Further, when the sweeping brush 5 located at the cleaning position A is lifted to the traveling position B, the engagement member 35 engages with the upper end portion of the upper cam groove 31 by swinging the support arm 3 upward, so that the cam arm 27 moves. Lifted, and thereby frame 21 and guide plate 2
Since 2 is lifted to the traveling position B, the road cleaning vehicle can travel safely.

Next, referring to FIGS.
Another embodiment of the present invention will be described, but the same components as those in the above embodiment are designated by the same reference numerals. In this embodiment, two guide members 101, 1 are provided on the side plate 14 of the dirt shoe 13.
02 is fixed, and slide portions 104 and 105 of a slide member 103 are supported by the guide members 101 and 102 so as to be movable back and forth respectively. A spring 106 is interposed between the front end of the front slide portion 104 and the side plate 14, and the slide member 103 is biased rearward. The connecting arm 26 of the frame 21 is rotatably supported by the slide member 103. Further, the slide member 103 is formed with a cam groove 109 with which the engagement member 35 provided at the tip of the support arm 3 engages. With respect to the cam shape of the cam groove 109, when the outer diameter of the sweeping brush 5 is reduced due to wear, the engaging member 35 and the cam groove 109 are engaged by the downward swing of the support arm 3, and this engagement is performed. Is set so that the slide member 103 moves forward against the urging force of the spring 106, and the tip of the guide plate 22 comes into contact with the peripheral surface of the sweeping brush 5 having a smaller outer diameter. As shown by the phantom line in FIG. 5, when the support arm 3 is swung upward to bring the sweeping brush 5 to the storage position B, the guide plate 22 and the frame body 21 as well as the dirt shoe 13 are stored at the storage position B. It is located in. In this embodiment, since it can be dealt with by simply changing the part of the dirt shoe 13, it can be implemented at a low cost and can be adapted to an existing one.

Next, modes of the sweeping device of the present application will be listed. (a) The movement transmitting mechanism is pivotally supported by a cam arm 27, to which the connecting arm 26 of the frame body 21 is pivotally mounted, on a connecting arm 28 rotatably supported by the vehicle body 1, and the cam arm 27 is provided on the supporting arm 3. The cleaning device for a road surface cleaning vehicle according to claim 1, wherein the cam groove 34 with which the engaging member 35 engages is formed. (b) When the sweeping brush 5 is positioned at the retracted position B at the time of feeding, the engagement member 35 engages with the upper end of the cam groove 34 by the upward swing of the support arm 3, and the frame 21 and the guide plate 22. Is located at the storage position B. The sweeping device for a road cleaning vehicle according to (a) above. (c) The movement transmission mechanism is attached to the dirt shoe 1
The side plate 14 of No. 3 is provided with a spring 106 for movably supporting the slide member 103 to which the connecting arm 26 of the frame body 21 is pivoted, and biasing the slide member 103 rearward. The sweeping device for a road surface cleaning vehicle according to claim 1, wherein a cam groove 109 with which the engaging member 35 provided on the arm 3 engages is formed.

[0015]

As described above, in the present application, the movement transmitting mechanism for converting the left and right support arms and the left and right end portions of the frame body into vertical movements of the support arm due to vertical movements of the support arm due to changes in the outer diameter of the sweeping brush. Since it is connected with, even if the sweeping brush wears, there is no need for complicated adjustment work by the operator as in the past.
According to this wear, the guide plate can be automatically brought close to the center of the sweep brush, and the guide plate can always be brought into contact with the peripheral surface of the sweep brush to perform a good dust collecting operation.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a main part of a sweeping device for a road cleaning vehicle (new sweeping brush).

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial cross-sectional view of a main part of a sweeping device of a road cleaning vehicle (sweeping brush at the time of replacement).

FIG. 4 is a partial cross-sectional view of a main part of a sweeping device for a road cleaning vehicle at the time of forwarding.

FIG. 5 is a partial sectional view of a main part of another embodiment of the sweeping device (new sweeping brush).

FIG. 6 is a partial cross-sectional view of a main part of another example of the sweep device (sweep brush at the time of replacement).

[Explanation of symbols]

1 vehicle body, 3 support arms, 5 sweeping brushes, 1
9 Dustproof flap, 21 Frame, 22 Guide plate, 2
5 Movement transmission mechanism

Claims (1)

[Claims] 1. A sweeping brush capable of freely grounding is rotatably supported on left and right support arms pivotally attached to the vehicle body, and a flexible dustproof flap covering the rear of the sweeping brush is hung on the vehicle body. In a sweeping device for a road surface cleaning vehicle, in which a frame body having a guide plate to be brought into contact with a sweeping brush is attached to a lower portion of the dustproof flap, the left and right support arms and the left and right end portions of the frame body are
The movement transmission mechanism that converts the vertical movement of the support arm due to the change of the outer diameter of the sweeping brush into the longitudinal movement of the frame is linked, and the guide plate is brought closer to the center of the sweeping brush according to the wear of the sweeping brush. A sweeping device for a road cleaning vehicle.