JP2021021191A - Brush cover structure of road sweeper - Google Patents

Abstract

To provide a brush cover structure of a road sweeper capable of effectively preventing an object to be cleaned from being scattered by a front brush.SOLUTION: A brush cover structure attached to a front brush 5 that is attached at a front portion of a vehicle body 1 so as to be movable left and right and rotatably around a substantially center of a vertical axis, includes: a cover 6 covering a part of an outer periphery of the front brush; and a support member 7 provided on the vehicle body 1 to support the cover 6. The cover 6 is movably supported by the support member 7 along the outer periphery of the front brush 5.SELECTED DRAWING: Figure 5

Description

The present invention relates to a brush cover structure for a road surface cleaning vehicle.

Conventionally, a cleaning position for cleaning the road surface by extending a predetermined amount to the outside of the vehicle body and a storage position (non-cleaning position) stored inside the vehicle body from the cleaning position are provided on each of the left and right sides of the vehicle body of the road surface cleaning vehicle. It is equipped with a side brush that can rotate around the center of the vertical axis that moves over. By rotating this side brush, dust, earth and sand, pebbles, and other objects to be cleaned on the road surface can be collected by scraping them toward the suction port provided on the vehicle body side. Then, the rotation of the side brush may cause the object to be cleaned to be largely bounced toward the vehicle body and hit the vehicle body or the like and fly in various directions. In order to prevent this, a brush cover that covers a part of the outer periphery of the side brush is provided (for example, Patent Document 1).

In the above configuration, the left and right side brushes are positioned at the cleaning positions protruding from the storage position to the side of the vehicle body, and the objects to be cleaned on the road surface are scraped out to the inside of the vehicle body. There is an inconvenience that the cleaning range cannot be expanded because it is limited to the end of the.

On the other hand, there is a road cleaning vehicle equipped with a front brush at the front of the vehicle body. Although this road surface cleaning vehicle can widen the cleaning range, it has a disadvantage that the scattering range in which the objects to be cleaned on the road surface are scattered is also widened, and there is room for improvement.

Japanese Patent No. 3851537 (Fig. 1)

An object of the present invention is to provide a brush cover structure for a road surface cleaning vehicle capable of effectively preventing scattering of an object to be cleaned by a front brush.

The brush cover structure of the road surface cleaning vehicle of the present invention is a brush cover structure that can be moved to the front of the vehicle body to the left and right and is attached to a front brush that is rotatably attached around the center of the vertical axis. A cover that covers a part of the outer periphery of the front brush and a support member provided on the vehicle body to support the cover are provided, and the cover can move along the outer periphery of the front brush. It is characterized in that it is supported by the support member.

According to the above configuration, by moving the front brush attached to the front part of the vehicle body to the left and right so as to be rotatable around the center of the vertical axis, the front brush is moved to any position on the left and right to perform cleaning work. be able to. Then, by moving the cover along the outer circumference of the positioned front brush until it reaches the position where you want to prevent the object to be cleaned from scattering, it is effective that the object to be cleaned that is bounced off by the front brush is scattered in various directions. Can be prevented.

Further, the brush cover structure of the road surface cleaning vehicle of the present invention may have a structure in which the support member is formed in a substantially ring shape and the cover moves along the support member formed in the substantially ring shape. ..

According to the above configuration, by moving the cover along the support member formed in a substantially ring shape, the cover can easily and reliably scatter the object to be cleaned regardless of the position of the front brush. Can be prevented.

Further, in the brush cover structure of the road surface cleaning vehicle of the present invention, the cover may be composed of a plurality of members in the vertical direction.

According to the above configuration, when the lower end of the cover rubs against the road surface due to the cleaning work for a predetermined time and the cover needs to be replaced, only the member located at the lower end needs to be replaced, so that the entire cover needs to be replaced. Compared to the case of doing so, it is advantageous in terms of cost.

Further, the brush cover structure of the road surface cleaning vehicle of the present invention includes an elevating mechanism having a pair of swingable links for elevating and lowering the front brush with respect to the vehicle body, and the support member is among the pair of links. It may be linked and linked to one of the links.

According to the above configuration, the support member can be raised and lowered in conjunction with the raising and lowering of the raising and lowering mechanism only by interlocking and connecting the support member to one of the links. Therefore, another raising and lowering mechanism for raising and lowering the support member is provided. Compared with the case, it is advantageous in terms of both assembly work and cost.

Further, in the brush cover structure of the road surface cleaning vehicle of the present invention, the support member may be attached by using a through hole provided in the member on the vehicle body side.

According to the above configuration, by using the through hole provided in the member on the vehicle body side as the attachment hole for the support member, the support member can be attached without forming a hole for attaching the support member on the vehicle body side. it can.

As described above, since the cover provided on the front part of the vehicle body and supported by the support member so as to be movable along the outer circumference of the front brush that can be moved to the left and right, it is effective to scatter the object to be cleaned by the front brush. It is possible to provide a brush cover structure for a road cleaning vehicle that can be prevented.

It is a front view of the brush cover structure of the road surface cleaning vehicle which concerns on this embodiment, and shows the state which the front brush is in the retracted position. It is a front view of the brush cover structure, and shows the state which the front brush is in a cleaning position. It is a side view of the brush cover structure, and shows the state which the front brush is in a non-cleaning position. It is a side view of the brush cover structure, and shows the state which the front brush is in a cleaning position. It is a plan view of the brush cover structure, and shows the state which the front brush is in the retracted position. It is a plan view of the brush cover structure, and shows the state that the cleaning work is performed with the front brush along the side wall. It is a plan view of the brush cover structure, and shows the state where the cleaning work is performed with the front brush along the side wall, and is the state where the rotation angle of the arm is larger than that in FIG. It is a plan view of the brush cover structure, and shows the state that the cleaning work is performed with the front brush along the median strip. It is a perspective view which looked at the cover from the back side. It is a perspective view which shows the structure of a cam lever.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The brush cover structure of the road surface cleaning vehicle according to the present embodiment is attached to the front portion of the vehicle body. As shown in FIGS. 1, 2 and 5, rails 2 having substantially the same length as the left-right width are attached to the front portion of the vehicle body 1 in a state of being along the left-right direction. The rail 2 is provided with a box 3 that can be moved by the driving force of an actuator (for example, a motor) (not shown), and the base end of an arm 4 (shown in FIG. 5) that can be integrally moved under the box 3. A portion is swingably attached around the center of the vertical axis, and a brush cover structure S for a road surface cleaning vehicle is provided at the tip of the arm 4.

The arm 4 is configured to swing left and right by the driving force of an actuator (for example, a motor or a cylinder) (not shown). As shown in FIGS. 1 to 4, this brush cover structure S is movable to the left and right by swinging the arm 4 from side to side, and is rotatably attached around the substantially vertical axis Z. A cover 6 that covers a part of the outer periphery of the front brush 5 and a support member 7 provided on the vehicle body 1 to support the cover 6 are provided. In addition to the front brush 5, each of the left and right side portions of the vehicle body 1 may be provided with side brushes (not shown), or other portions may be provided with brushes (not shown). Further, the vehicle body 1 is provided with a suction recovery device (not shown) that sucks and collects objects to be cleaned such as dust, earth and sand, and pebbles scraped off by the front brush 5 and the side brushes.

As shown in FIGS. 1 and 4, the front brush 5 includes a large number of brushes 5A and a disk-shaped base 5B on which the upper ends of these brushes 5A are planted. The brush 5A is made of various synthetic resins, but in some cases, it is made of metal. Further, the brush 5A located on the outer peripheral edge of the brush 5A is planted on the base 5B in an inclined posture in which the lower end is located on the outside. A motor 8 is arranged on the upper part of the base 5B, and the front brush 5 can be rotated about substantially the vertical axis Z by driving the motor 8. Since the brush 5A is located outside the base 5B in the plan view, the front brush 5 is cleaned along the side wall 25 and the median strip 26 as shown in FIGS. 6 to 8. When doing so, it is possible to prevent the base 5B from coming into contact with the side wall 25 or the median strip 26. A spraying device (not shown) for spraying water toward the front brush is provided during the cleaning work by rotating the front brush 5. This spraying device prevents dust from flying up.

Further, a bracket 9 is attached to the upper surface of the base 5B of the front brush 5, and the bracket 9 is rotatably attached to a connecting member 15 described later about the horizontal axis X. The bracket 9 is formed in a substantially L-shape having a horizontal portion 9A attached to the base 5B and a vertical portion 9B extending upward from one end of the horizontal portion 9A and attached to a connecting member 15 described later.

The brush cover structure includes an elevating mechanism 10 for elevating and elevating the front brush 5 with respect to the vehicle body 1. As shown in FIGS. 1 to 3, the elevating mechanism 10 has one end (base end) on the upper side of a U-shaped support frame 12 (see FIG. 5) fixed to the arm 4 with an open front. Is inserted and rotatably attached by the first bolt B1. The lower side is open. The upper link 13 has a U-shaped cross section, and the lower side of the support frame 12 and the upper link 13 are abbreviated. A lower link 14 having one end (base end) inserted into the support frame 12 and rotatably attached by a second bolt B2 in a parallel posture is provided, and the other end (tip) of the upper link 13 is provided. ) And the other end (tip) of the lower link 14 are connected by bolts in the vertical direction via a vertical connecting member 15 to form a parallel link mechanism.

As shown in FIGS. 1 and 2, through holes for inserting the first bolt B1 are formed in the upper end portion of the U-shaped support frame 12 and the base end portion of the upper link 13, respectively. The first bolt B1 is inserted into the through hole from one end side in the width direction, and a nut (not shown) is screwed into the tip of the first bolt B1 that is inserted and protrudes from the other end side in the width direction. Further, through holes for inserting the second bolt B2 are formed at the lower end portion of the U-shaped support frame 12 and the base end portion of the lower link 14, respectively, and one end side in the width direction is formed in these through holes. The second bolt B2 is inserted from the bolt B2, and a nut (not shown) is screwed into the tip of the second bolt B2 that is inserted and protrudes from the other end side in the width direction.

Further, an upper rod 16 penetrating in the horizontal direction is provided in the middle portion in the longitudinal direction of the upper link 13, and both ends of the upper rod 16 and straight portions 7B and 7B of the support member 7 described later are connected in a vertically long vertical direction. It has 17 and 17 bodies. Further, the tip of the piston rod of the first hydraulic cylinder 18 to which the base end of the cylinder tube is attached to the vertical intermediate portion of the support frame 12 by the bolt B3 is attached to the upper rod 16 penetrating the upper link 13. There is. Through holes for inserting the third bolt B3 are formed in the vertical intermediate portion of the U-shaped support frame 12 and the base end portion of the cylinder tube of the first hydraulic cylinder 18, respectively, and penetrate them. A third bolt B3 is inserted into the hole from one end side in the width direction, and a nut (not shown) is screwed into the tip of the third bolt B3 that is inserted and protrudes from the other end side in the width direction.

Therefore, by extending the first hydraulic cylinder 18, the upper link 13 and the lower link 14 are swung, and the posture of the front brush 5 is changed to an inclined posture in which the tips thereof are directed diagonally upward. It can be positioned in a non-cleaning position lifted upward from the road surface (see FIG. 1). Further, by shortening the operation of the first hydraulic cylinder 18, the upper link 13 and the lower link 14 are swung to change the posture to the horizontal posture, so that the front brush 5 is positioned at the cleaning position in contact with the road surface. Can be done (see Figure 2).

Frame bodies 11 that are longer in the vertical direction than the support frame 12 are fixed to both sides of the support frame 12 in the width direction by the bolts B1, B2, and B3. These frame bodies 11 and 11 are members for attaching rod-shaped members 23 and 23, which will be described later, to support the support member 7 so as to be able to move up and down. Therefore, by utilizing the through hole formed in the support frame 12 attached to the vehicle body side via the arm 4, the support member 7 is placed on the vehicle body side without separately forming a through hole for attachment in the support frame 12. Can be attached.

A long hole 13A long in the longitudinal direction is formed at the other end (tip) of the upper link 13, and the connecting member 15 is formed by a bolt 19 penetrating the through hole and the long hole 13A formed at the upper end of the connecting member 15. The upper end of the cylinder and the other end (tip) of the upper link 13 are connected, and the connecting member 15 is a hydraulic cylinder (not shown) in a vertical posture shown by a solid line in FIG. 1 and an inclined posture shown by a two-dot chain line in FIG. The posture can be changed by the elastic force of. Along with this posture change to the tilted posture, the front brush 5 is changed from the horizontal posture to the downward-sloping posture (when viewed from the vehicle body 1, the front is lowered to the front) as shown by the two-dot chain line in FIG. be able to.

Further, a second hydraulic cylinder 20 is provided between the connecting member 15 and the bracket 9. Therefore, by extending and operating the second hydraulic cylinder 20 in the horizontal state of the front brush 5, the bracket 9 is rotated counterclockwise about the horizontal axis X in FIG. 1, so that the front brush 5 is in the horizontal posture. The posture can be changed from (see the solid line in FIG. 3) to a downward-sloping posture (see the two-point chain line in FIG. 3). When viewed from the vehicle body 1, the front brush 5 is in an inclined posture downward to the right. Further, by shortening the operation of the second hydraulic cylinder 20 in the horizontal state of the front brush 5 shown by the solid line in FIG. 3, the bracket 9 is rotated clockwise in FIG. 3, and the front brush 5 is lowered to the right from the horizontal posture. The posture can be changed to an inclined posture (see the two-point chain line in FIG. 3). When viewed from the vehicle body 1, the front brush 5 is in an inclined posture downward to the left. The above-mentioned forward downward tilting posture, right downward tilting posture, and left downward tilting posture suppress the progress of wear of all the brushes 5A by bringing only a part (outer peripheral edge) brush 5A into contact with the road surface. Because. When the front brush 5 is rotated in an inclined posture in this way, the axis of rotation is a center of rotation slightly tilted from the center of the vertical axis, and the center of rotation including the center of inclination is substantially the vertical axis.

The cover 6 is located at a position where dust, earth and sand, pebbles and other objects to be cleaned (particularly pebbles) that are bounced off by the front brush 5 are scattered in various directions and come into contact with other traveling vehicles or are separated from the suction port. It is provided to prevent the object to be cleaned that has been bounced off from being unable to be collected. Further, as shown in FIG. 5, the cover 6 includes a fixed side cover 61 and a movable side cover 62 movably supported by the support member 7 along the outer circumference of the front brush 5. The movable side cover 62 is arranged so as to partially overlap the fixed side cover 61 side in the circumferential direction with the first movable side cover 63 and the first movable side cover 63 so as to partially overlap in the circumferential direction. It includes a second movable side cover 64 to be arranged.

The support member 7 is made of metal and is formed in a substantially ring shape. As shown in FIG. 5, the support member 7 has a ring portion 7A having a substantially rectangular cross-sectional shape and parallel to the outside of the ring portion 7A from both ends of the ring portion 7A. It is provided with a pair of straight portions 7B and 7B extending in. The outer diameter of the ring portion 7A is smaller than the outer diameter of the base 5B of the front brush 5. As a result, even if the base 5B hits another object (for example, the side wall 25) during the cleaning operation, it is possible to prevent the ring portion 7A from hitting another object. Bolts 21 and 21 are penetrated through the intermediate portions of the straight portions 7B and 7B in the longitudinal direction, and the inner end portions of the bolts 21 and 21 and the lower ends of the connecting bodies 17 and 17 are connected to each other. Further, as shown in FIGS. 1 and 3, the free end portions of the straight portions 7B and 7B move up and down on the rod-shaped members 23 and 23 attached to the vertically long frames 22 and 22 fixed to the frame bodies 11 and 11. It is fixed to the elevating members 24, 24 that are possibly attached. Therefore, by swinging the upper link 13 and the lower link 14, the support member 7 is moved up and down, and the elevating members 24, 24 are guided up and down along the rod-shaped members 23, 23, so that the support member 7 is smoothly moved up and down. Can be made to. The support member 7 can be lifted and lowered simply by interlocking and connecting the support member 7 to both ends of the upper rod 16 inserted into the through hole formed in the one upper link 13 constituting the lifting mechanism 10 via the connecting bodies 17 and 17. Since it can be raised and lowered in conjunction with the raising and lowering of the mechanism 10, it is advantageous in terms of both assembly work and cost as compared with the case where another raising and lowering mechanism for raising and lowering the support member 7 is provided. Since the upper rod 16 is a member for penetrating and supporting the tip of the piston rod of the first hydraulic cylinder 18, the upper rod 16 originally penetrates the upper link 13 and screwed the nut. It suffices to have a length that can be provided, but in order to connect the upper link 13 and the support member 7 wider than the upper link 13 by the connecting bodies 17 and 17 in the vertical posture, the upper link 13 protrudes greatly from both ends. I am replacing it with a longer one. Also in this case, by utilizing the through hole originally formed in the upper link 13, the support member 7 can be attached without separately forming a through hole for attachment in the upper link 13. In short, the support member 7 can be attached to the main body side without forming a through hole in the main body side member.

The fixed side cover 61 is made of rubber (may be made of synthetic resin) and is formed in a plate shape, and is formed in an arc shape in a plan view. The fixed side cover 61 is fixed to the frame bodies 11 and 11 via mounting members (not shown). The fixed side cover 61 has an upper end lower than the upper end of the first movable side cover 63, and is located inside the inner surface of the first movable side cover 63, and is located on the fixed side of the first movable side cover 63. By overlapping the cover side end portion with the first movable side cover side end portion of the fixed side cover 61 from the outside, a gap is not generated between the fixed side cover 61 and the first movable side cover 63. There is. When the first fitting support portion 631 described later is located at the linear portion 7B side end of the ring portion 7A, the position of the first movable side cover 63 toward the fixed side cover 61 is higher than that of the first fitting support portion 631. It is determined by the regulation of movement.

As shown in FIGS. 6, 9 and 10, the first movable side cover 63 has two first frames having a first fitting support portion 631 movably supported by the ring portion 7A at one end. Close the fan-shaped opening surrounded by the 632, 633, the arc-shaped first connecting frame 634 that connects the extending ends of the first frames 632 and 633, the first frame 632, 633, and the first connecting frame 634. A metal first reinforcing plate 636 fixed to the outer surface of the top side first cover 635 and the first connecting frame 634 and having the same length in the longitudinal direction as the first connecting frame 634, and a first reinforcing plate. The upper end of the rubber upper first sheet member 637 whose upper end is fixed to 636 by a bolt or the like and the upper end of the upper first sheet member 637 are connected by a bolt or the like, and the lower end moves while contacting the road surface. It is provided with a rubber lower first sheet member 638. One of the first frames 632 and 633 is arranged between the second frames 642 and 643 of the second movable side cover 64, which will be described later, and the other is arranged on the fixed side cover 61 side. Then, one first frame 633 is composed of one square tubular straight frame, and the other first frame 632 is bifurcated from the first fitting support portion 631. It is composed of straight frames 632A and 632B.

As shown in FIGS. 3 and 9, a first reinforcing member 639 made of metal (which may be made of synthetic resin) is provided on the back surface (inner side surface) of the upper first sheet member 637. The first reinforcing member 639 is a plurality of vertically oriented metal first square timbers 639A fixed to the back surface of the first reinforcing plate 636 at regular intervals in the circumferential direction by bolts or the like, and all the first square timbers 639A. It includes a plate-shaped first connecting member 639B having the same circumferential length as the upper first sheet member 637 that connects the lower end portions. Further, a vertical cut 638K is formed at a lower portion of the lower first sheet member 638 at regular intervals along the circumferential direction. Each of the first fitting support portions 631 has a U-shaped first plate member 631A that can be arranged on the ring portion 7A from the lateral direction, and the first plate member 631A vertically at two locations inside and outside the ring portion 7A. A first rod-shaped member 631B, 631B that penetrates the first rod-shaped member 631B, 631B, and first rollers 631C, 631C made of synthetic resin that are rotatably externally fitted to the first rod-shaped members 631B, 631B, and first fitted to the ring portion 7A. The joint support portion 631 can be moved smoothly. On the upper surface of each first fitting support portion 631, a first cam lever for switching between a movable state in which the first fitting support portion 631 is movable and a fixed state in which the first fitting support portion 631 is fixed so as not to be movable with respect to the ring portion 7A. It is equipped with 631D. The first cam lever 631D is configured to swing around the center of the horizontal axis, and is fixed by swinging and lying outward in the radial direction (see the first cam lever 631D on the back side of FIG. 10) and swings. By tilting it inward in the radial direction, it becomes movable (see the first cam lever 631D on the front side in FIG. 10).

The second movable side cover 64 is arranged so as to be displaced from the first frames 632 and 633 of the first movable side cover 63 in the circumferential direction, and is movably externally supported by the ring portion 7A. Two second frames 642, 643 having a portion 641 at one end and an arc-shaped second connecting frame connecting the extending ends of the second frames 642, 643 (not shown, abbreviated as the first connecting frame 634). (Same configuration), the top side second cover 645 that closes the opening surrounded by the second frame 642, 643 and the second connecting frame, and fixed to the outer surface of the second connecting frame, and the length in the longitudinal direction with the second connecting frame. A metal second reinforcing plate 646 having the same structure, a rubber upper second seat member 647 whose upper end is fixed to the second reinforcing plate 646 by a bolt or the like, and an upper second seat member 647. The lower end portion is connected to the lower end portion by a bolt or the like, and the lower end portion is provided with a rubber lower second seat member 648 that moves while contacting the road surface. One of the second frames 642 and 643 is arranged between the first frames 632 and 633 of the first movable side cover 63, and the other is arranged at the position farthest from the fixed side cover 61. Then, one second frame 642 is composed of one square tubular straight frame, and the other second frame 643 is bifurcated from the second fitting support portion 641. It is composed of straight frames 643A and 643B.

A second reinforcing member 649 is provided on the back surface of the upper second sheet member 647. The second reinforcing member 649 is a plurality of vertically oriented metal second square timbers 649A fixed to the back surface of the second reinforcing plate 646 at regular intervals in the circumferential direction by bolts or the like, and all the second square timbers 649A. It is provided with a plate-shaped second connecting member 649B having the same circumferential length as the upper second sheet member 647 connecting the lower end portions. Further, a vertical cut 648K is formed at a lower portion of the lower second sheet member 648 at regular intervals along the circumferential direction. The second fitting support portion 641 penetrates the ring portion 7A in the vertical direction at two locations inside and outside the ring portion 7A, the U-shaped second plate member 641A and the second plate member 641A that can be arranged laterally. The second rod-shaped members 641B and 641B and the synthetic resin second rollers 641C and 641C rotatably fitted to the second rod-shaped members 641B and 641B are provided, and the second rod-shaped members 641C and 641C are fitted to the ring portion 7A. The support portion 641 can be moved smoothly. On the upper surface of each of the second fitting support portions 641, a second cam lever for switching between a movable state in which the second fitting support portion 641 is movable and a fixed state in which the second fitting support portion 641 is fixed to the ring portion 7A is immovable. It is equipped with 641D. The second cam lever 641D is configured to swing freely around the center of the horizontal axis, and is fixed by swinging and lying outward in the radial direction (see the second cam lever 641D on the back side in FIG. 10), and swings. By tilting it inward in the radial direction, it becomes movable (see the second cam lever 641D on the front side in FIG. 10). The lower surface of the second frame 642, 643 is set higher than the upper surface of the top side first cover 635, and the outer surface of the first movable side cover 63 is set inside the inner surface of the second movable side cover 64. The second movable side cover 64 side end of the first movable side cover 63 can slip into the first movable side cover 63 side end of the second movable side cover 64. Therefore, by switching the first cam levers 631D, 631D and the second cam levers 641D, 641D from the fixed state to the movable state, the cover 6 is formed along the support member 7 formed in a substantially ring shape, and here, the first movable side cover. The 63 and the second movable side cover 64 can be moved. By moving the first movable side cover 63 and the second movable side cover 64, the cover 6 (fixed side cover 61, first movable side cover 61, first movable side cover 61) covers the scattering of the object to be cleaned regardless of the position of the front brush 5. The side cover 63 and the second movable side cover 64) can be reliably prevented.

A case where, for example, a highway having at least two lanes, an overtaking lane and a traveling lane, is cleaned by using the brush cover structure configured as described above will be described. FIG. 5 shows a case where the front brush 5 is located at the storage position. In this storage position, the front brush 5 is housed within the left and right vehicle widths by moving the box 3 to the right end of the vehicle body 1 and arranging the arm 4 in a posture along the left-right direction. In the storage position, the front brush 5 is in a non-cleaning position raised from the road surface. When cleaning is performed while traveling in the traveling lane from this storage position, the arm 4 facing in the left-right direction is swung forward by a predetermined angle in order to move the front brush 5 to, for example, the passenger seat side (left side). And move the box 3 to the left. Subsequently, the front brush 5 descends to a cleaning position in contact with the road surface, and the front brush 5 is driven and rotated. FIG. 6 shows a case where the arm 4 is swung forward by 30 degrees and the outer peripheral edge of the front brush 5 is in contact with the side wall 25, and FIG. 7 shows the case where the arm 4 is swung forward by 45 degrees. The case where the outer peripheral edge of the front brush 5 is in contact with the side wall 25 is shown. In FIG. 7, since the swing angle is larger than that in FIG. 6, the tip of the arm 4 is located inside of FIG. Therefore, when aligning the laterally protruding position of the front brush 5 shown in FIG. 6 with the laterally protruding position of the front brush 5 of FIG. 7, the position of the box 3 is moved to the left side of FIG. Will let you. Further, in FIG. 7, the second movable side cover 64 is moved to the side away from the first movable side cover 63, and the range covering the front brush 5 is enlarged as compared with FIG. As a result, it is possible to reliably prevent the scattered object from moving to the overtaking lane side and coming into contact with the vehicle traveling in the overtaking lane, for example.

FIG. 8 shows a state in which the front brush 5 is moved along the median strip 26 on the right side of the overtaking lane for cleaning. Before the vehicle travels, first, the first movable side cover 63 and the second movable side cover 64 located on the right side with respect to the upper link 13 in FIG. 7 are moved to the left side on the opposite side of FIG. .. From this state, the arm 4 is swung 135 degrees forward from the position shown in FIG. 5 (45 degrees to the right when the extension line to the front is used as a reference (0 degrees)) to the median strip 26 outside the front brush 5. The case where the peripheral edges are in contact is shown. In this case, since the left and right sides are only opposite to those in FIG. 7, the second movable side cover 64 is moved to the side away from the first movable side cover 63 to cover the front brush 5 in the same manner as in FIG. It is expanded compared to 6. As a result, it is possible to reliably prevent the scattered object from moving to the traveling lane side and coming into contact with the vehicle traveling in the traveling lane, for example.

In FIGS. 6 and 7, the front brush 5 is run along the left side wall 25 so that the scattered objects bounced off by the front brush 5 do not move to the right side opposite to the side wall 25. The right side portion, the right front side portion, and the right rear side portion of No. 5 are covered with the cover 6. Moreover, the range covering the front brush 5 on the right front side is wider than the range covering the front brush 5 on the right rear side. This is because the scattered matter off the right rear side hits the vehicle body 1 and is difficult to move to the right side, while the scattered matter off the right front side easily moves to the right side because there is no vehicle body 1. Is. Further, in FIG. 8, the front brush 5 is run along the median strip 26 on the right side so that the scattered matter bounced off by the front brush 5 does not move to the left side opposite to the median strip 26. The left side portion, the left front side portion, and the left rear side portion of the front brush 5 are covered with the cover 6. Moreover, the range covering the front brush 5 on the left front side is wider than the range covering the front brush 5 on the left rear side. This is because scattered objects off the left rear side hit the vehicle body 1 and are difficult to move to the left, while scattered objects off the left front side are easy to move to the left because there is no vehicle body 1. Is.

It should be noted that the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the cover 6 includes the fixed side cover 61, the first movable side cover 63, and the second movable side cover 64, but the cover is composed of the fixed side cover and one movable side cover. The cover may be composed of a fixed side cover and three or more arbitrary number of movable side covers, or may be composed of two or more arbitrary number of movable side covers. ..

Further, in the above embodiment, the cleaning work is performed with the front brush 5 moved to the left end portion or the right end portion of the vehicle body 1, but the front brush 5 is moved to the center portion in the left-right direction of the vehicle body 1. The cleaning work may be performed in this state, or the cleaning work may be performed while moving the front brush 5 in the left-right direction. When cleaning while moving the front brush 5 in the left-right direction, move the cover 6 to a motor or the like so that the position of the cover 6 becomes the optimum position with respect to the front brush 5 according to the position of the front brush 5 in the left-right direction. It is preferable to automatically move the actuator by using the driving force of the actuator.

Further, in the above embodiment, the cover 6 is manually moved along the outer circumference of the front brush 5, but it may be moved by using the driving force of an actuator such as a motor.

Further, in the above embodiment, the cover 6 is composed of two members in the vertical direction, but may be composed of one member or an arbitrary number of three or more members.

Further, in the above embodiment, the elevating mechanism 10 is composed of a pair of upper and lower links 13 and 14, but it may be composed of a pair of left and right links or a parallel quadruple link mechanism.

1 ... Body, 2 ... Rail, 3 ... Box, 4 ... Arm, 5 ... Front brush, 5A ... Brush, 5B ... Base, 6 ... Cover, 7 ... Support member, 7A ... Ring part, 7B ... Straight part, 8 ... Motor, 9 ... Bracket, 9A ... Horizontal part, 9B ... Vertical part, 10 ... Elevating mechanism, 11 ... Frame body, 12 ... Support frame, 13 ... Upper link, 13A ... Long hole, 14 ... Lower link, 14 ... Upper link, 15 ... connecting member, 16 ... upper rod, 17 ... connecting body, 18 ... first hydraulic cylinder, 19 ... bolt, 20 ... second hydraulic cylinder, 21 ... bolt, 22 ... frame, 23 ... rod-shaped member, 24 ... Elevating member, 25 ... Side wall, 26 ... Central separation band, 61 ... Fixed side cover, 62 ... Movable side cover, 63 ... First movable side cover, 64 ... Second movable side cover, 631 ... First fitting support , 632, 633 ... 1st frame, 634 ... 1st connecting frame, 631A ... 1st plate member, 631B ... 1st rod-shaped member, 631C ... 1st roller, 631D ... 1st cam lever, 632A, 632B ... Straight frame, 635 ... Top side first cover, 637 ... Upper first sheet member, 638 ... Lower first sheet member, 638K ... Cut, 639 ... First reinforcing member, 639A ... First square member, 639B ... First connecting member, 641 ... 2nd fitting support, 642, 643 ... 2nd frame, 641A ... 2nd plate member, 641B ... 2nd rod-shaped member, 641C ... 2nd roller, 641D ... 2nd cam lever, 643A, 643B ... Straight frame, 645 ... Top side 2nd cover, 646 ... 2nd reinforcing plate, 647 ... Upper 2nd sheet member, 648 ... Lower 2nd sheet member, 648K ... Cut, 649 ... 2nd reinforcing member, 649A ... 2nd square member, 649B ... 2 Connecting material, S ... Brush cover structure, X ... Horizontal axis, Z ... Approximately vertical axis

Claims (5)

It is a brush cover structure that can be attached to the front brush that can be moved left and right and rotatably around the center of the vertical axis at the front of the vehicle body.
A cover that covers a part of the outer periphery of the front brush and a support member provided on the vehicle body to support the cover are provided.
A brush cover structure for a road surface cleaning vehicle, wherein the cover is supported by the support member so as to be movable along the outer periphery of the front brush. The brush cover structure of a road surface cleaning vehicle according to claim 1, wherein the support member is formed in a substantially ring shape, and the cover moves along the support member formed in the substantially ring shape. The brush cover structure for a road surface cleaning vehicle according to claim 1 or 2, wherein the cover is composed of a plurality of members in the vertical direction. A lifting mechanism having a pair of swingable links for raising and lowering the front brush with respect to the vehicle body is provided, and the support member is interlocked and connected to one of the pair of links. The brush cover structure of the road surface cleaning vehicle according to any one of claims 1 to 3. The brush cover structure for a road surface cleaning vehicle according to any one of claims 1 to 4, wherein the support member is attached by using a through hole provided in a member on the vehicle body side.