JP6891712B2 - Road cleaning vehicle - Google Patents

Description

The present invention relates to a road surface cleaning vehicle provided with a hopper for collecting dust, and discharges the dust collected in the hopper by lifting the front side of the hopper and opening the discharge door provided at the rear of the hopper.

As exemplified in Patent Document 1, the road surface cleaning vehicle is provided with a box-shaped hopper on the chassis, and collects dust on the road surface collected by a brush and a pickup head on the hopper. The rear part of the hopper is equipped with a discharge door that opens and closes with a hydraulic cylinder, a latch that locks the discharge door, and a hydraulic cylinder that operates the latch. If the discharge door is opened and the front side of the hopper is lifted after the lock is released, dust can be discharged from the rear part of the opened hopper.

Jitsufuku No. 5-35138

In the above-mentioned conventional road surface cleaning vehicle, separate hydraulic cylinders are provided for the operation of the discharge door and the operation of the latch, and each hydraulic cylinder is controlled by using a switching valve in the hydraulic circuit, so that the discharge door can be opened and closed. Such a structure becomes complicated, which leads to an increase in cost.

Therefore, an object of the present invention is to provide a road surface cleaning vehicle which can simplify the structure for opening and closing the discharge door of a hopper having a latch and can reduce the cost.

In order to achieve the above object, the invention according to claim 1 is provided with a hopper for collecting dust and the like on the chassis, and a dust and the like discharge port and a discharge door that can open and close the discharge port at the rear of the hopper. An actuator that opens and closes the discharge door by expanding and contracting is provided, while the discharge door is provided with a latch that locks the opening operation by locking to a locked portion provided on the hopper when the discharge port is closed. It ’s a road cleaning car,
The operating end of the actuator is connected to the discharge door, and the actuator is extended from the first locking position that opens and closes the discharge door as the actuator expands and contracts, and from the first locking position when the discharge port is closed. A guide portion is provided so that the operating end can move between the operating end and the second locking position, and an urging means for urging the operating end to the first locking position is provided. In the meantime, the latch is moved to the unlocked position where the latch is not locked to the locked portion at the first locking position of the operating end, and the latch is locked to the locked portion at the second locking position of the operating end. A linkage mechanism is provided to move it to the lock position,
When the actuator is retracted from the state where the operating end is in the second locking position and the latch is in the locked position when the discharging port is closed by the discharging door, the operating end moves to the first locking position. Then, the latch moves to the unlocked position via the linkage mechanism, and the discharge door is opened by the contraction operation of the actuator from the first locking position, while the operating end is opened by the discharge door. When the actuator is extended from the state where it is in the first locking position and the latch is in the unlocking position, the operating end closes the discharge door, and then the second is opposed to the urging of the urging means. By moving to the locking position, the latch is characterized by moving to the locking position via the coupling mechanism.
The invention according to claim 2 is characterized in that, in the configuration of claim 1, the urging means is a coil spring.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the linking mechanism connects a linking bar extending in a direction orthogonal to the moving direction of the operating end, the linking bar and the operating end, and moves the operating end. A feature is that the latch is connected to the linking bar, and the latch rotates to the unlocked position and the locked position by the rotation of the linking bar accompanying the movement of the operating end. To do.
According to a fourth aspect of the present invention, in the configuration of the third aspect, the linking member is connected to the operating end side and the linking bar side by screwing both ends thereof, and the linking member is connected to the operating end side and the linking bar side. The latch angle can be adjusted by changing the rotation angle of the linking bar by adjusting the screwing amount of.
The invention according to claim 5 is characterized in that, in any of the configurations of claims 1 to 4, the locked portion includes a roller.

According to the first aspect of the present invention, one actuator can sequentially perform the opening / closing operation of the discharge door and the engagement / disengagement operation of the latch at different timings. Therefore, the structure related to the opening and closing of the discharge door of the hopper having the latch can be simplified, and the cost can be reduced.
According to the second aspect of the present invention, in addition to the effect of the first aspect, by adopting a coil spring as an urging means, the operating end can be easily and surely urged to the first locking position. it can.
According to the invention of claim 3, in addition to the effect of claim 1 or 2, by adopting a linking mechanism including a linking bar and a linking member, the latch is rotated in cooperation with the expansion / contraction operation of the actuator to be covered. It can be easily engaged and disengaged from the locking portion.
According to the invention of claim 4, in addition to the effect of claim 3, the angle of the latch can be adjusted by adjusting the screwing amount of the linking member, so that the latch can be reliably engaged and disengaged from the locked portion. be able to.
According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4, the locked portion includes a roller, so that the latch can be smoothly engaged and disengaged.

It is a side view of a road cleaning vehicle. It is a rear view of a road cleaning vehicle. It is an enlarged view of the lower part of the rear surface of a discharge door. It is an enlarged cross-sectional view of the latch part at the lower part of the side surface of the discharge door (the latch is in the lock position). It is an enlarged cross-sectional view of the lower center of the side surface of the discharge door (the latch is in the locked position). It is an enlarged cross-sectional view of the lower center of the side surface of the discharge door (the latch is in the unlocked position). It is a side view of the road surface cleaning vehicle which lifted up the hopper.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an example of a road surface cleaning vehicle. The road surface cleaning vehicle 1 is provided with a box-shaped hopper 3 on the upper rear side of the chassis 2 (the right side of FIG. 1 is the front), while the chassis. A brush 4 is provided in the lower part of the front side of 2, and a pickup head 5 is provided in the lower part of the rear side so as to be movable up and down. 6 is a front wheel, 7 is a rear wheel, and with the brush 4 and the pickup head 5 in close contact with the road surface, dust and the like swept up by the brush 4 are sucked by the pickup head 5 and sent to the hopper 3 via the duct 8. collect. As shown by the alternate long and short dash line, the hopper 3 can lift up the front side with the rear end as a fulcrum by a lift mechanism (not shown).

Further, the rear plate 3a of the hopper 3 has an inclined surface that descends toward the rear, and the discharge port 9 formed on the lower side of the rear plate 3a can be opened and closed by the discharge door 10. As shown in FIG. 2, the discharge door 10 is a horizontally long plate-like body whose upper left and right sides are rotatably connected to the rear plate 3a of the hopper 3 by hinges 11 and 11, and is formed on the rear surface of the discharge door 10. As shown in FIGS. 3 to 5, guide plates 12 and 12 as a pair of left and right guide portions having elongated holes 13 parallel to the rear surface of the discharge door 10 are provided at predetermined intervals in the center in the left-right direction. It is erected in the vertical direction. On the other hand, a pair of left and right triangular fulcrum plates 14 and 14 whose tip portions project rearward are erected at predetermined intervals on the upper center of the rear plate 3a in the left-right direction.

The ends of the cylinder body 16 of the hydraulic cylinder 15 as an actuator are rotatably connected between the tips of the fulcrum plates 14 and 14 with respect to the left-right direction. Then, the operating end 18 provided at the tip of the piston rod 17 of the hydraulic cylinder 15 is arranged between the guide plates 12 and 12, and the elongated hole 13 is formed by the connecting shaft 19 in the left-right direction penetrating the elongated holes 13 and 13. , 13 are movably connected.
Therefore, when the piston rod 17 of the hydraulic cylinder 15 contracts and the connecting shaft 19 integrated with the operating end 18 is locked to the upper ends of the elongated holes 13 and 13, the discharge door 10 is lifted rearward around the hinges 11 and 11. As it is, as the piston rod 17 contracts, it can rotate upward to open the discharge port 9.

The connecting shaft 19 is formed with a length in which both ends project to the left and right outer sides of the left and right guide plates 12 and 12, and upper receivers 20 and 20 having openings on the upper and left and right outer sides are connected to both ends, respectively. There is. Below the upper receivers 20 and 20 and below the discharge door 10, lower receivers 21 and 21 having openings at the upper and rear sides are connected, respectively, and between the upper receiver 20 and the lower receiver 21. , Coil springs 22 as urging means are interposed in each compressed state. Further, a screw rod 23 penetrating the coil spring 22 is provided between the upper receiver 20 and the lower receiver 21, respectively. The upper end of the screw rod 23 is fixed to the inner upper surface of the upper receiving metal 20, the lower end penetrates the lower receiving metal 21, and the screw rod 23 is screwed with a nut 24 for preventing the screw from coming off below the lower receiving metal 21. It is matched.

On the other hand, in the discharge door 10, a pair of left and right latches 26, 26 capable of locking and unlocking the opening operation of the discharge door 10 with the discharge port 9 closed are linked with the operating end 18 of the piston rod 17. A linking mechanism 25 for operating the door is provided.
The linking mechanism 25 connects the linking bar 27 extending in the left-right direction under the discharge door 10, the linking bar 27 and the operating end 18, and serves as a linking member that rotates the linking bar 27 as the operating end 18 moves. Includes a linking rod 28. The linking bar 27 is rotatably supported by penetrating between the tips of the left and right brackets 29, 29 fixed downward to the lower end of the discharge door 10, and is supported outside the brackets 29, 29 at both ends of the linking bar 27. , The base end of the latch 26 having an L-shaped side view is integrally connected. At the center of the linking bar 27, a linking piece 30 projecting rearwardly substantially orthogonal to the proximal direction of the latch 26 is integrally provided.

The linking rod 28 has screw portions at the upper and lower ends, and the upper end thereof is connected to the operating end 18 via a U-shaped joint metal fitting 31, and the lower end thereof is connected to the rear end of the linking piece 30 via a pair of joint plates 32, 32. Each is connected.
The joint metal fitting 31 moves integrally with the operating end 18 by penetrating the upper ends located on both sides of the operating end 18 through the connecting shaft 19, and a through hole is formed in the lower center of the joint metal fitting 31. An upper nut 33 is fixed to the lower surface of the rod, and a threaded portion at the upper end of the linking rod 28 is screwed into the upper nut 33.
The lower ends of the joint plates 32 and 32 are connected to the rear end of the linking piece 30 by a stop pin 34, and the upper ends are connected outward to each other and the lower nut 35 is held between them. The threaded portion at the lower end of the linking rod 28 is screwed into the lower nut 35.

In this way, the linking rod 28 is erected between the operating end 18 and the linking piece 30 of the linking bar 27 via the joint metal fitting 31 and the joint plates 32, 32, and the linking rod 28 is screwed into the upper nut 33 and the lower nut 35. By adjusting the amount, the angle of the linking piece 30 can be adjusted, and the angle of the linking bar 27 and the latch 26 integrated with the linking bar 27 can be adjusted. Reference numerals 36 and 36 are fixing nuts that fix the adjustment position of the linking rod 28 by being screwed into the linking rod 28 adjacent to the upper nut 33 and the lower nut 35, respectively.

A locked portion 40 corresponding to the latches 26, 26 of the discharge door 10 is provided on the lower surface of the rear portion of the hopper 3. The locked portion 40 is erected between a pair of support plates 41 and 41 formed downward at positions sandwiching the latches 26 and 26 from the left and right from the lower surface of the hopper 3 and the lower ends of the support plates 41 and 41. It consists of a roller 42.
Therefore, when the latch 26 rotates counterclockwise around the linking bar 27 in a side view, the tip 26a of the latch 26 wraps around to the lower side of the roller 42 and locks with the roller 42 to discharge the latch 26, as shown in FIGS. Lock the opening of the door 10 (lock position).
On the other hand, when the latch 26 rotates clockwise about the linkage bar 27 in a side view from this lock position, the tip 26a of the latch 26 separates from the lower side of the roller 42 and unlocks the discharge door 10 as shown in FIG. (Unlock position).

Here, in the state where the discharge door 10 is closed, the connecting shaft 19 of the operating end 18 is locked to the upper ends of the elongated holes 13 and 13 of the guide plates 12 and 12, and at the first locking position, the linking rod 28 is used. Since the linking piece 30 is pulled upward, the linking bar 27 rotates clockwise in FIGS. 4 and 5 to move the latches 26 and 26 to the unlocked position.
On the other hand, at the second locking position where the connecting shaft 19 of the operating end 18 is locked to the lower ends of the elongated holes 13 and 13 of the guide plates 12 and 12, the linking piece 30 is pushed downward via the linking rod 28. Therefore, the linkage bar 27 rotates counterclockwise in FIG. 6 to move the latches 26 and 26 to the locked position.

In the road surface cleaning vehicle 1 configured as described above, when the brush 4 and the pickup head 5 collect dust and the like on the road surface, the piston rod 17 of the hydraulic cylinder 15 has the operating end 18 at the second locking position. In the extended state, the latches 26 and 26 are maintained in the locked position where they engage with the rollers 42 and 42.
When the piston rod 17 is contracted when the dust or the like collected in the hopper 3 is discharged from the hopper 3 from here, the linking piece 30 is pulled up via the linking rod 28, so that the linking bar 27 is on the right as described above. Rotate and rotate the latches 26, 26 clockwise. Then, when the operating end 18 reaches the first locking position, the latches 26 and 26 move to the unlocking position. When the operating end 18 is moved, the left and right upper brackets 20 and 20 are pushed upward by the left and right coil springs 22 and 22, so that the operating end 18 is surely raised to release the lock by the latches 26 and 26.

When the piston rod 17 continues to contract as it is, the connecting shaft 19 locked to the upper ends of the elongated holes 13 and 13 of the guide plates 12 and 12 lifts the discharge door 10 upward via the guide plates 12 and 12, and the fulcrum plate 14 The discharge door 10 is rotated upward around the hinges 11 and 11 while the hydraulic cylinder 15 is also rotated upward around the hinges 11 and 14. Therefore, the discharge port 9 is opened.
When the hopper 3 is lifted up in this state, as shown in FIG. 7, dust or the like in the hopper 3 falls rearward from the discharge port 9 and is discharged.
When the discharge of dust and the like is completed, the hopper 3 is lifted down and the piston rod 17 is extended. Then, the discharge door 10 rotates downward around the hinges 11 and 11 to close the discharge port 9.
At this time, since the operating end 18 is urged to the first locking position of the elongated holes 13 and 13 by the coil springs 22 and 22, the operating end 18 accidentally becomes the first when the discharge door 10 is closed. It does not move to the locking position side of 2. Therefore, the unlocked positions of the latches 26 and 26 are maintained.

When the piston rod 17 continues to extend after the discharge door 10 is closed in this way, the operating ends 18 and the upper brackets 20 and 20 descend against the urging of the coil springs 22 and 22, and they are linked via the linking rod 28. The piece 30 is pushed down, and the linkage bar 27 is rotated counterclockwise to rotate the latches 26 and 26 counterclockwise as described above.
Then, when the operating end 18 reaches the second locking position, the latches 26 and 26 return to the locked position again and are locked to the rollers 42 and 42 of the locked portions 40 and 40 to lock the discharge door 10. Will be done.

As described above, in the road surface cleaning vehicle 1 of the above-described embodiment, the operating end 18 of the hydraulic cylinder 15 is connected to the discharge door 10, and the first locking position for opening and closing the discharge door 10 as the hydraulic cylinder 15 expands and contracts. Guide plates 12 and 12 are provided so that the operating end 18 can move between the first locking position and the second locking position where the hydraulic cylinder 15 is extended from the first locking position when the discharge port 9 is closed. , Coil springs 22, 22 for urging the operating end 18 to the first locking position are provided, and the latch 26, is provided between the operating end 18 and the latches 26, 26 at the first locking position of the operating end 18. Coordination mechanism that moves 26 to an unlocked position that does not lock on the locked portion 40, and moves latches 26 and 26 to a locked position that locks on the locked portion 40 at the second locking position of the operating end 18. When 25 is provided and the discharge port 9 is closed by the discharge door 10, the hydraulic cylinder 15 is contracted from the state where the operating end 18 is in the second locking position and the latches 26 and 26 are in the locked position. When the operating end 18 moves to the first locking position, the latches 26 and 26 move to the unlocking position via the linking mechanism 25, and the hydraulic cylinder 15 contracts from the first locking position. While the discharge door 10 is open, the hydraulic cylinder 15 is opened from the state where the discharge port 9 is opened by the discharge door 10, the operating end 18 is in the first locking position, and the latches 26 and 26 are in the unlocking position. When the extension operation is performed, the operating end 18 closes the discharge door 10 and then moves to the second locking position against the urging of the coil springs 22 and 22, so that the latches 26 and 26 are linked by the linkage mechanism 25. It is designed to move to the lock position via.
With this configuration, one hydraulic cylinder 15 can sequentially perform the opening / closing operation of the discharge door 10 and the engagement / disengagement operation of the latches 26 and 26 at different timings. Therefore, the structure for opening and closing the discharge door 10 of the hopper 3 having the latches 26 and 26 can be simplified, and the cost can be reduced.

In particular, here, since the urging means are the coil springs 22 and 22, the operating end 18 can be easily and surely urged to the first locking position.
Further, the linking mechanism 25 connects the linking bar 27 extending in the direction orthogonal to the moving direction of the operating end 18, the linking bar 27 and the operating end 18, and the linking rod 28 rotates the linking bar 27 as the operating end 18 moves. The latches 26 and 26 are connected to the linkage bar 27, and the latches 26 and 26 rotate to the unlocked position and the locked position due to the rotation of the linkage bar 27 accompanying the movement of the operating end 18. The latches 26 and 26 can be rotated in conjunction with the expansion and contraction operation of the hydraulic cylinder 15 to be easily engaged and disengaged from the locked portions 40 and 40.
Further, the linking rod 28 is connected by screwing both ends to the upper nut 33 on the operating end 18 side and the lower nut 35 on the linking bar 27 side, and the linking rod 28 is screwed into the upper nut 33 and the lower nut 35. Since the angle of the latch 26 can be adjusted by changing the rotation angle of the linking bar 27 by adjusting the amount, it is possible to reliably engage and disengage the latch 26 with respect to the locked portion 40.
In addition, since the locked portion 40 includes the roller 42, the latch 26 can be smoothly engaged and disengaged.

In the above embodiment, the coil springs are arranged on both the left and right sides of the operating end, but the coil spring may be on either the left or right side, or one coil spring may be attached to the linking rod so that the operating end is set to the first locking position. You may try to urge. Further, the urging means is not limited to the coil spring, but a damper, a gas spring, or the like can also be adopted.
Further, as the actuator, a pneumatic cylinder, a ball screw, or the like can be adopted in addition to the hydraulic cylinder. The linking mechanism can be changed as appropriate, such as increasing or decreasing the number of latches, the shape of the latches, and the structure using gears.
In the above embodiment, the discharge door having the upper end as a hinge is provided so as to be openable and closable in the vertical direction, but the present invention can be applied even when the left and right ends are hinged and can be opened and closed in the horizontal direction.
In addition, the other structure of the road surface cleaning vehicle is not limited to the above-described embodiment, and the present invention can be applied to, for example, a vehicle provided with a dust collecting mechanism other than the pickup head.

1 ... Road cleaning vehicle, 2 ... Chassis, 3 ... Hopper, 9 ... Discharge port, 10 ... Discharge door, 12 ... Guide plate, 13 ... Long hole, 15 ... Hydraulic cylinder, 16 ... Cylinder body, 17 ... Piston rod, 18 ... Operating end, 19 ... Connecting shaft, 20 ... Upper receiver, 21 ... Lower receiver, 22 ... Coil spring, 25 ... Linking mechanism, 26 ... Latch , 27 ... Linking bar, 28 ... Linking rod, 30 ... Linking piece, 31 ... Joint metal fittings, 32 ... Joint plate, 40 ... Locked part, 42 ... Roller.

Claims (5)

A hopper for collecting dust and the like is provided on the chassis, and a dust and the like discharge port, a discharge door that can open and close the discharge port, and an actuator that opens and closes the discharge door by an expansion and contraction operation are provided at the rear of the hopper. On the other hand, the road surface cleaning vehicle is provided with a latch on the discharge door that locks the opening operation by locking the locked portion provided on the hopper when the discharge port is closed.
A first locking position in which an operating end of the actuator is connected to the discharge door to open and close the discharge door as the actuator expands and contracts, and a first locking position in a closed state of the discharge port. A guide portion is provided so that the operating end can move between the second locking position in which the actuator is extended from the door, and the urging means for urging the operating end to the first locking position. Is provided,
Between the operating end and the latch, the latch is moved to an unlocked position that does not lock on the locked portion at the first locking position of the operating end, and the second locking position of the operating end. A linkage mechanism is provided to move the latch to a lock position where the latch is locked to the locked portion at the lock position.
When the actuator is retracted from the state where the operating end is in the second locking position and the latch is in the locked position when the discharging port is closed by the discharging door, the operating end is in the second locking position. By moving to the locking position of 1, the latch moves to the unlocking position via the linking mechanism, and the discharge door is opened by the contraction operation of the actuator from the first locking position. on the other hand,
When the actuator is extended from the state where the operating end is in the first locking position and the latch is in the unlocking position when the discharging port is opened by the discharging door, the operating end becomes said. After closing the discharge door, the latch moves to the lock position via the linkage mechanism by moving to the second locking position against the urging of the urging means. A characteristic road cleaning vehicle. The road surface cleaning vehicle according to claim 1, wherein the urging means is a coil spring. The linking mechanism includes a linking bar extending in a direction orthogonal to the moving direction of the operating end, and a linking member that connects the linking bar and the operating end and rotates the linking bar as the operating end moves. The latch is connected to the linking bar, and the latch is rotationally moved to the unlocked position and the locked position by the rotation of the linking bar accompanying the movement of the operating end. Road cleaning vehicle according to 2. The linking member is connected to the operating end side and the linking bar side by screwing both ends, and by adjusting the screwing amount of the linking member with respect to the operating end side and the linking bar side, the linking bar The road surface cleaning vehicle according to claim 3, wherein the angle of the latch can be adjusted by changing the rotation angle. The road surface cleaning vehicle according to any one of claims 1 to 4, wherein the locked portion includes a roller.

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