JP4607816B2 - Brush cleaning work vehicle - Google Patents

Description

  The present invention relates to a brush cleaning work vehicle, and more particularly, to a brush cleaning work vehicle that performs work such as cleaning a general road or a road surface of a wide area such as a runway of an airfield, snow removal, and the like.

As shown in FIG. 8, a cleaning vehicle 100 that generally cleans a road surface is configured by mounting a brush device 110 including a roll-shaped brush roll 133 that is driven to rotate on the front portion of a traveling vehicle body 102. .
Such a cleaning work vehicle 100 cleans the road surface by running while rotating the brush roll 133 in contact with the road surface.

Brush device 110 includes a brush body 131 which rotatably supports 8 and the brush roller 133 as described above, made of a support 13 5,135 to support both ends of the brush body 131, the supports 135 Are respectively provided with support tires 136 that are brought into contact with the road surface C. The brush roll 133 supported by the brush body 131 is rotated by a hydraulic motor 137. Further, the brush body 131 can turn left and right within a horizontal plane around a turning axis (vertical axis) 123.

  With the brush cleaning work vehicle 1 having the above-described configuration, during cleaning work (including snow removal), the brush body 131 of the brush device 110 is inclined with respect to the traveling direction of the vehicle body 102 and the brush roll 133 is rotated. Sweep dirt (snow) etc. diagonally forward. Thereby, dust (snow) or the like in front of the vehicle body 102 is swept to the side. Further, when the vehicle body 102 is transported, the brush body 131 is lifted from the road surface and travels.

By the way, in order to perform a cleaning operation in a wide area such as a runway of an airfield, for example, if the brush roll 133 of the brush device 100 is made as long as possible, it is effective that the cleaning width can be widened by one run. .
However, when the brush roll 133 is lengthened, the weight of the brush device 110 becomes heavy. As a result, when the brush device 110 is lifted from the ground during forwarding, there are limitations and problems in design such as an increase in the front axle load of the truck chassis, and there is a natural limit to lengthening the brush body 131 .
Moreover, when the brush roll 133 is lengthened, there arises a problem that the full length and the entire width of the vehicle at the time of forwarding increase, and a wide space such as a garage is required. Furthermore, since the road surface is usually gently convex at the center, there is a problem that when the brush roll 133 is long, the grounding of the brush roll 133 becomes uneven as shown in FIG.

Accordingly, as shown in FIG. 7, as shown in FIG. 7 , the front snowbrush device 207 and the rear snowbrush device are provided via a support frame provided on the lower surface of the snow removal vehicle as a means for solving the problems of the general cleaning work vehicle . 2. Description of the Related Art A snowbrush device 210 that connects 211 and 212 to increase the working width is known (see, for example, Patent Document 1).
The snow brush device 210 disclosed in Patent Document 1 includes a snow plow 207 at the front of the vehicle body, a front snow brush device 211, and a rear snow brush device 212. These brush devices 211 and 212 are The hydraulic cylinders 226 and 227 can be changed to work postures that move to the outside of the snow removal vehicle 200 or storage postures that move to the inside of the snow removal vehicle 200, respectively.
As a result, in snow removal (cleaning) work, wide snow removal (cleaning) is possible, and at the time of forwarding, the width of the vehicle is reduced so as not to hinder the passage of a tunnel or the like.

JP 9-316842 A

However, in the snow brush device 210 of the above publication, the front brush device 211 and the rear brush device 212 are stored via a support frame provided near the center of the lower surface of the snow removal vehicle. There is a problem that the overhang width is reduced, the work width for snow removal (cleaning) cannot be increased, and the work efficiency is poor.
Further, in the retracted posture, the longitudinal direction of the brush rolls of the front brush device 211 and the rear brush device 212 is almost the vehicle width direction or the oblique direction, and therefore may not be able to fit within the vehicle width. Therefore, there is also a problem that there is a high risk of contact with an obstacle on the side of the road during forwarding.
Further, since the front brush device 211 and the rear brush device 212 are stored on the lower surface of the vehicle body, there is a problem that the clearance with the road surface is reduced and there is a high possibility of contact with an obstacle on the road surface during forwarding.

[Object of the present invention]
For this reason, the present invention provides a brush cleaning work vehicle that can improve the inconvenience of the above-mentioned conventional example and improve the work efficiency, and can travel without any trouble if the road is wider than the vehicle width at the time of forwarding. For the purpose.

A brush cleaning work vehicle according to the present invention includes a vehicle body that extends long in the traveling direction and includes a front wheel and a rear wheel, and a brush roll for road surface work that is mounted on a front portion of the vehicle body in the traveling direction. A front brush device provided with a front brush device, and one and the other side brush device on both side surfaces of the central region of the vehicle body and on the front side portion of the region where the rear wheel is located. Each side brush device is a brush roll that functions in the same manner as a brush roll for road surface work of the front brush device, a frame main body portion that rotatably supports the brush roll, and a frame main body portion Each side brush device comprises a hydraulic motor for driving a brush roll, and a pair of legs that are provided at both ends of the frame main body and support the frame main body at both ends. Between each side bra. An arm mechanism for individually holding the apparatus so as to be movable up and down is provided, and this arm mechanism is connected to a connecting body that rotatably holds a vertical axis that is fixedly attached to the center of the upper surface of the frame main body portion in advance. An arm body that moves the entire side brush device up and down through the body, and a hydraulic mechanism that urges the arm body to drive the driving force for the up and down movement. And a means for adjusting the tilt angle of the brush roll with the vertical axis as the center of rotation .

In the present invention described above, the work is a concept including snow removal work and cleaning work.
Also, the front brush device which is set to a predetermined angle at the time of progression, will be handled between longitudinal ends of the on a line perpendicular to the traveling direction as the maximum vehicle width.

By adopting such a configuration, the side brush device provided on at least one side surface of the vehicle body can be in a working posture projecting outside the maximum vehicle width including the front brush device. The working width is expanded by the amount of overhang of the device. As a result, by working with the front brush device, the working width can be expanded, and the working efficiency can be improved.
Further, since the side brush device can be raised by the arm mechanism, if it is raised to the retracted posture, there is less risk of interference with obstacles on the road surface, and there is no hindrance to running on rough roads. In addition, since the side brush device can be stored on the side of the vehicle body and within the maximum vehicle width, it can travel without any trouble if the road is wider than the vehicle width during forwarding.

At this time, the rotation surface of the brush roll of the front brush device mounted on the front portion of the vehicle body is disposed so as to be inclined with respect to the left-right direction orthogonal to the traveling direction of the vehicle body, and the front portion At least one of the side brush devices mounted on the same side as the direction of the rotation surface of the brush roll of the brush device is in the same installation state as the front brush device at the time of operation, and the side surface than the front brush device ( It is preferable that the vehicle body is mounted on one side surface of the vehicle body so as to be set in a state of projecting outward.

In addition, since the present invention is configured as described above, the side brush device provided on at least one side surface of the vehicle body can be in a working posture that protrudes outside the maximum vehicle width including the front brush device. The working width is increased by the overhang of the side brush device. As a result, by working with the front brush device, the working width can be expanded, and the working efficiency can be improved.

Since the present invention is configured and functions as described above, at the time of work, the work can be performed with the side brush device that projects outward from the side surface of the vehicle body and the front brush device. Therefore, the work width can be increased, and the work efficiency such as cleaning is improved.
Further, since the brush device can be stored within the maximum vehicle width, it can travel without any trouble as long as the road passes through the vehicle body during forwarding.

  1 to 5 show a brush cleaning work vehicle (hereinafter simply referred to as a work vehicle) 1 of the present invention. 1 is an overall plan view of the work vehicle 1, FIG. 2 is an overall side view of the work vehicle 1, FIG. 3 is a view taken along line III-III in FIG. 1, and FIG. FIG. 5 is a view along the line III-III in FIG. 1 and is a working posture view of the side brush device.

As shown in FIGS. 1 and 2, the work vehicle 1 includes a vehicle body 2, and the vehicle body 2 includes a vehicle body frame 3 that is a frame member that extends long in the traveling direction.
A driver's cab 4 is provided in the front part of the body frame 3, and a plurality of front traveling wheels 5 and a rear traveling wheel 6 are provided in the lower part of the body frame 3, respectively.

A front brush device 7 is provided in front of the driver's cab 4 (left direction in FIG. 1) and is attached to the foremost part of the vehicle body frame 3. Further, on both side surfaces of the vehicle body frame 3 of the vehicle body 2, for example, a pair of side brush devices 10 (11, 12) composed of one and the other having substantially the same structure as the front brush device 7 are provided separately on the left and right. Has been.
Here, the pair of side brush devices 10 may not have a structure substantially similar to that of the front brush device 7, can have a larger work width, and can improve work efficiency such as cleaning. A brush device may be used.

It said front brush device 7, Oite cab front portion of the vehicle body 2, the to allow the movement of the vertically of the vehicle body frame 3 as a reference, and is provided rotatably in a horizontal plane. The front brush device 7 is disposed in an inclined state at a predetermined angle with respect to the traveling direction (left direction in FIG. 1) during the work, and the garbage is disposed obliquely forward as the work vehicle advances. The road surface can be cleaned while sweeping snow and snow.
Further, the front brush device 7 is configured to lift the front brush device 7 and travel away from the ground at the time of forwarding.

It said side brush device 10, as shown in FIG. 1, one side brushes mounted on the side of one side of the vehicle body 2 (left side toward the traveling direction) in the moving direction tip side of the rear wheel 6 a first brush unit 11 is a device, a second brush device which is the other side brush devices attached to the same parts as the first brush unit 11 (the right side toward the traveling direction) the other side surface of the vehicle body 2 12. These first brush unit 11, the second brush unit 12 has substantially the same structure as the front brush device 7 described above.

And the 1st brush apparatus 11 and the 2nd brush apparatus 12 are the storage attitude | positions ( storage state disclosed in the advancing direction in FIG. 1) in which each fits in the largest vehicle width W, and projects outside the vehicle width. It is configured to be switchable between two postures of working postures ( working state disclosed in the traveling direction in FIG. 1).
Here, as described above, the maximum vehicle width W is the distance between both ends in the longitudinal direction when projected on a straight line orthogonal to the traveling direction of the front brush device 7 set at a predetermined angle during traveling. Say.

The first brush device 11 and the second brush device 12 are arranged substantially symmetrically with respect to the center line in the front-rear direction of the body frame 3 as shown in FIG. Therefore, hereinafter, the first brush device 11 will be described as a representative.

(Attaching the first brush device 11)
As shown in FIGS. 1 and 3 , the first brush device 11 includes a frame body 31, leg portions 32 and 32 that support the frame body 31 at both ends, and a road surface supported by the frame body 31. A brush roll 33 for cleaning C is provided, and is attached to the vehicle body frame 3 of the vehicle body 2 via the brush attachment means 15.
The brush attachment means 15 includes an arm mechanism 24 connected to the first brush device 11, and a hydraulic mechanism 25 that drives the arm mechanism 24 to move up and down as shown in FIG. The vehicle body frame 3 is connected.
Thus, the first brush device 11 is movable up and down with respect to the vehicle body 2 by the brush attachment means 15 . Further, as shown in FIG. 1, the first brush device 11 has a horizontal plane formed by two third hydraulic cylinders 28, 28 laid between a frame main body 31 and a connecting body 20 of an arm mechanism 24 described later. It is supposed to be freely rotatable within.

The arm mechanism 24 includes an arm body 16 and a connecting body 20 that connects the arm body 16 to one end and the first brush device 11 to the other end.
As shown in FIGS. 3 to 5 , the arm body 16 is attached to a bracket 8 fixed to the side surface of the vehicle body frame 3.
That is, the arm body 16 is formed in substantially the same length as shown in the drawing, it consists of a parallelogram composed of the first link 17 Contact and second link 18 disposed vertically, and the first link 17 The base end of the second link 18 is attached to the bracket 8, and the tip is attached to the connecting body 20. Thereby, the 1st link 17 and the 2nd link 18 comprise the principal part of a four-bar linkage mechanism.

A cylinder bracket 21 extending to the bracket 8 side is fixed to the upper surface of the first link 17. One end of a first hydraulic cylinder 26 constituting the hydraulic mechanism 25 is pivotally attached to the cylinder bracket 21 at a position above the arm body 16. The other end of the first hydraulic cylinder 26 is pivotally attached to a pedestal 22, and the pedestal 22 is fixed to the upper surface of the vehicle body frame 3.
When the first hydraulic cylinder 26 expands and contracts, the entire arm body 16 and the connecting body 20 and the like can be rotated up and down.

A third link 19 and a second hydraulic cylinder 27 are provided to rotate the arm body 16 and the like upward. That is, the third link 19 has a proximal end pivotally attached to the lower portion of the first link 17 and a distal end pivotally attached to one end of the second hydraulic cylinder 27. The other end of the second hydraulic cylinder 27 is pivotally attached to the bracket 8.
The second hydraulic cylinder 27 is used when it is not necessary to set the first brush device 11 to the retracted posture A as in the case of forwarding, such as movement in the field.

Then, by driving the second hydraulic cylinder 27, the third link 19 is rotatable in the vertical direction with respect to the first link 17, by stretching the second hydraulic cylinder 27, the third link 19 first When the arm 17 further extends from the state in contact with the lower surface of the link 17, the entire arm body 16 is rotated upward via the third link 19.

  The connecting body 20 is formed in a substantially square block shape, is disposed between the arm body 16 and the first brush device 11, and is connected to both 16 and 11.

As described above , the first brush device 11 cleans the road surface C by being supported by the frame body 31, the leg portions 32 and 32 that support the frame body 31 at both ends , and the frame body 31. A brush roll 33 is provided.

The frame main body 31 is formed of, for example, a hollow rectangular member and is longer than the length of the brush roll 33, and legs 34 are provided on both ends in the length direction of the frame main body 31 via support members 35. A tire 36 is attached to the leg 34.
Then, in this case, the leg 34, the leg portion 32 is constituted by a support member 35, and a tire 36.

Further, both ends in the length direction of the frame main body 31 are hanging portions 31A that are bent downward.
The brush roll 33 is supported between the vertical lower 31A, the central portion in the longitudinal direction, vertical axis 23 provided downward in the upper central portion of the frame body portion 31 as shown in FIG. 1 And is rotatably attached to the connecting body 20. A hydraulic motor 37 is attached to the lower end of the hanging part 31 </ b> A, and the brush roll 33 is rotatable by driving the hydraulic motor 37.

As shown in FIG. 1, two third hydraulic cylinders 28, which are means for adjusting the inclination angle of the brush roll 33 , are provided between the main body 31 of the first brush device 11 and the connecting body 20. 28 is laid.
That is, as shown in FIG. 1 , the two third hydraulic cylinders 28, 28 are each pivotally attached to both sides of the vertical shaft 23 of the frame main body portion 31, and the other ends are side surfaces of the coupling body 20. It is pivotally attached to a symmetrical position (surfaces opposite to each other) . The main body 31 and the brush roll 33 are rotated about the vertical shaft 23 by the expansion and contraction of the two third hydraulic cylinders 28 and 28.

  Next, based on FIG. 6, the hydraulic circuit of the 1st, 2nd hydraulic cylinders 26 and 27 which drive the 1st brush apparatus 11 is demonstrated.

A first hydraulic pump 40 that supplies pressure oil to the first and second hydraulic cylinders 26 and 27 supplies pressure oil to the hydraulic cylinders 26 and 27 via a pipe 41.
In the middle of the pipeline 41, first and second switching valves 42 and 43 are arranged. The first switching valve 42 is a two-position switching valve, and the second switching valve 43 is a three-position switching valve.
When the first switching valve 42 is switched to the left position 42A by the excitation of the built- in solenoid, the hydraulic cylinder 26 communicates with the tank 44 via the pipelines 57 and 58, and from the first hydraulic pump 40. The pressure oil also communicates with the tank 44.

  When the first switching valve 42 is switched to the right position 42B by excitation of the solenoid, the pressure oil from the first hydraulic pump 40 is supplied to the rod side chamber 26A of the first hydraulic cylinder 26 via the first pilot check valve 45. . At this time, the pipe 58 communicating with the tank 44 is not in communication.

The bottom side chamber 26 </ b> B of the first hydraulic cylinder 26 is always in communication with the tank 44 via pipe lines 59 and 58. Further, a third switching valve 46 is disposed in the middle of the pipeline 61.
The third switching valve 46 is a two-position switching valve. When the solenoid is excited and switched to the left position 46A, the pilot line 60 of the first pilot check valve 45 communicates with the bottom side chamber 26B. It communicates with the tank 44 via a pipeline 59.

When the third switching valve 46 is switched to the right position 46B, the rod of the first hydraulic cylinder 26 is opened when the check valve of the first pilot check valve 45 is opened via the pipeline 61 by the pressure oil from the second hydraulic pump 47. The flow of pressure oil from the side chamber 26A to the first switching valve 42 side is allowed.

  The second switching valve 43 is a three-position switching valve. When the solenoid is excited and switched to the neutral position 43C, the pressure oil from the first hydraulic pump 40 is directly sent to the first switching valve 42, and the right position is changed. When switched to 43B, it is sent to the bottom side chamber 27B of the second hydraulic cylinder 27 via the pipeline 62 and the third pilot check valve 51, and when switched to the left position 27A, the pipeline 63 and the second pilot check valve 50 to the rod side 27 </ b> A of the second hydraulic cylinder 27.

When the pressure oil is supplied to the rod side chamber 27A (or bottom side chamber 27B) of the second hydraulic cylinder 27, each pipe line 62 (or 63 ) from which the pressure oil from the head side chamber 27B (or rod side chamber 27A) is discharged. The second pilot check valve 50 (or the third pilot check valve 51) is opened by the pressure generated in the pressure oil supply side pipe 62 (or 63) and allows the flow to the switching valve 43 side. .

The holding, first relief valve 54 is provided between the conduit 59 and 61 to hold the pressure of the circuit in the set value, also, the setting value of pressure times path is between the conduit 41,58 A second relief valve 55 is provided.
In addition, although the 1st switching valve 42 and the 2nd switching valve 43 are connected in series in embodiment, you may connect in parallel.

Next, the operation of this embodiment will be described.
First, a description will be given of when the work vehicle 1 is forwarded. Hereinafter, an example of performing a cleaning operation as an operation will be described. However, the operation includes a snow removal operation.
At the time of forwarding, the first brush device 11 is determined on the side surface of the vehicle body 2 along the longitudinal axis YY (see FIG. 1) of the vehicle body 2 and at the both ends in the width direction of the front brush device 7. The vehicle width W is stored so as to match or almost fit.

Here, as shown in FIG. 1, the second brush device 12 on the right side is in the retracted position A including the time of forwarding in the traveling direction (left direction in FIG. 1) , and the first brush device 11 on the left side is working. Attitude B. The first brush device 11 on the left side also takes the storage posture A similar to that of the second brush device 12 on the right side during feeding.
The state of the retracted posture A is a state where it is lifted from the road surface C as shown in FIG.

  In the above-described storage posture A, the first hydraulic cylinder 26 is brought into the most contracted state, that is, as shown in FIG. 6, the first switching valve 42 is switched to the left position 42A by the excitation of the solenoid. The pressure oil is retained by 45 by containing the pressure oil in the rod side chamber 26 </ b> A of the first hydraulic cylinder 26.

Next, the working posture B will be described. Here, it will be described first brush unit 11 on the left side toward the traveling direction in FIG.
After the work vehicle 1 arrives at the cleaning site, when the third switching valve 46 is switched to the right position 46B by excitation of the solenoid in FIG. 6 from the storage posture A in FIG. 3, the pressure oil from the second hydraulic pump 47 Then, the first pilot check valve 45 is opened, and the oil in the rod side chamber 26 </ b> A of the first hydraulic cylinder 26 is returned to the tank 44 via the first switching valve 42.
As a result, the first hydraulic cylinder 26 is extended by the weight of the first brush device 11, and as a result, the arm body 16 is rotated downward, and the first brush device 11 is stretched downward and outward in the vehicle width. put out.

Thereafter, just before the brush roll 33 comes into contact with the road surface C, the third switching valve 46 is returned to the left position 46A by the excitation of the solenoid, and the first brush device 11 is held in a state of floating from the cleaning surface. Next, by driving the third hydraulic cylinder 28, the main body 31 is rotated with respect to the connecting body 20 about the vertical shaft 23, and the first brush device 11 is in the working posture B as shown in FIG. 4.
This working posture B is set at substantially the same angle as the front brush device 7 with respect to the work vehicle 1. Here, as shown in FIG. 1 and FIG. 2, the work vehicle 1 is set to sweep out dust and snow diagonally to the left front.

Next, as shown in FIG. 5, the brush roll 33 is grounded.
The grounding of the brush roll 33 switches the third switching valve 46 to the right position 46B by excitation of the solenoid, returns the oil in the rod side chamber 26A of the first hydraulic cylinder 26 to the tank 44, and further extends the first hydraulic cylinder 26. Is done.
The working posture B of the first brush device 11 has been described above, but the second brush device 12 is the same as the first brush device 11 described above.

  On the other hand, the front brush device 7 is also grounded by the same operation as described above, the brush roll 33 of the front brush device 7 and the first brush device 11 is rotated by the hydraulic motor 37, and the cleaning operation is performed by the traveling of the work vehicle 1. I do.

  As described above, the cleaning width or the snow removal width that has been conventionally performed for cleaning or snow removal only with the front brush device is the front brush device 7 and the first brush device 11 or the front brush device 7 and the second brush device 12. By using together, the cleaning or snow removal width of the work vehicle 1 at one time is widened, and the snow removal efficiency is increased.

  When the work is completed and forwarded, the solenoid of the first switching valve 42 is excited and switched to the right position 42B, contrary to the time when the work is started, and the pressure oil from the first hydraulic pump 40 is supplied to the first hydraulic cylinder. 26 is supplied to the rod side chamber 26A, the first hydraulic cylinder 26 is reduced, the arm body 16 is rotated upward and toward the vehicle body 2, and the first brush device 11 is kept until the brush roll 33 is completely separated from the road surface C. Is raised, the first switching valve 42 is switched to the left position 42A.

  At this time, if the third switching valve 46 is switched to the left position 46A by the excitation of the solenoid, the first pilot check valve 45 is closed, the oil in the rod side chamber 26A of the first hydraulic cylinder 26 is sealed, and the first The hydraulic cylinder 26 does not extend, so that the first brush device 11 maintains the raised position.

Next, the two hydraulic cylinders 28 and 28 are driven in directions opposite to each other, the main body 31 is rotated with respect to the connecting body 20 about the vertical shaft 23, and the longitudinal axis YY of the vehicle body 2 is set. Make almost parallel.
Thereafter, the first switching valve 42 is switched to the right position 42B by the excitation of the solenoid, the pressure oil from the first hydraulic pump 42 is supplied to the rod side chamber 26A of the first hydraulic cylinder 26, and the arm body 16 is moved upward. Further, by rotating to the vehicle body 2 side, the first brush device 11 is stored within the maximum vehicle width W and substantially parallel to the longitudinal axis YY of the vehicle body 2.

  At the time of forwarding, when the first hydraulic cylinder 26 is contracted to the minimum, the first brush device 11 takes the uppermost and innermost retracted position A, but the first pilot check valve 45 causes the rod side chamber of the first hydraulic cylinder 26 to move forward. Since 26A is sealed, the retracted posture A can be maintained.

  When it is not necessary to set the first brush device 11 to the retracted posture A as in the case of moving in the field, the second hydraulic cylinder 27 is driven and the first brush device 11 remains in the working posture A. Raise from working position.

  That is, the first brush device 11 is switched from the grounding posture shown in FIG. 5 to the right position 43B by switching the second switching valve 43 to the right position 43 by the excitation of the solenoid, and the second hydraulic cylinder 27 is extended. 4 is brought into contact with the lower surface of the link 17 and further extended, whereby the entire arm body 16 is rotated upward to be separated from the road surface C as shown in FIG.

When starting the work, contrary to the above, the second switching valve 43 is switched to the left position 43A by excitation of the solenoid, and the second hydraulic cylinder 27 is contracted to rotate the arm body 16 downward. The brush roll 33 may be grounded to the road surface C.
Accordingly, the first brush device 11 is dragged for other than cleaning or snow removal work without the brush roll 33 interfering with an obstacle on the road surface C when the work vehicle 1 moves in the field. Therefore, careless damage and wear of the brush roll 33 can be prevented.

As described above, when the arm body 16 is rotated downward and the brush roll 33 is grounded to the road surface C, the first hydraulic cylinder 26 needs to expand and contract following the movement of the first link 17 of the arm body 16. is there.
At this time, the third switching valve 46 is switched to the right position 46B by excitation of the solenoid, and the first pilot check valve 45 is held in an open state, whereby the rod side chamber 26A and the bottom side chamber 26B of the first hydraulic cylinder 26 are maintained. Is communicated with the tank 44, so that the rotation of the arm body 16 is not hindered.

  The extension end of the second hydraulic cylinder 27, that is, the stroke end on the ascending side of the arm body 16, is set so that the first brush device 11 is located at a position where the traveling of the work vehicle 1 is not hindered.

  When the first brush device 11 is lifted by the first hydraulic cylinder 26, the first link 17 of the arm body 16 rotates in a direction away from the third link 19 connected to the second hydraulic cylinder 27. The operation of the first hydraulic cylinder 26 is not hindered by the driving of the second hydraulic cylinder 27.

  When the first brush device 11 is lowered, the second switching valve 43 is switched to the left position 43A, the second hydraulic cylinder 27 is contracted, and the third link 19 is connected to the first link 17 of the arm body 16. It may be lowered to a position where it does not interfere.

  Since the second link 18 is configured to have a bifurcated shape in plan view, the vertical rotation of the second hydraulic cylinder 27 and the third link 19 does not interfere with the movement of the arm body 16. .

According to the above embodiment, the following effects can be obtained.
(1) Since, for example, the first brush device 11 provided on the side surface of the vehicle body 2 can be projected outside the maximum vehicle width including the front brush device 7, the working width is equal to the extent of the projection of the first brush device 11. Expands. As a result, when the first brush device 11 and the front brush device 7 work together, the work width can be expanded, and the efficiency of work efficiency can be improved.

  (2) Since the first brush device 11 can be raised to the retracted posture A at the time of forwarding, there is less risk of interference with obstacles on the road surface C, and there is no hindrance to traveling on rough roads.

  (3) Since the first brush device 11 can be stored in the maximum vehicle width W at the side of the vehicle body 2 at the time of forwarding, it can travel without any trouble if the road is larger than the maximum vehicle width W of the work vehicle 1 at the time of forwarding. it can.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the second hydraulic cylinder 27 is used when the first brush device 11 does not have to be set to the retracted posture A as in the case of forwarding, such as movement in the field. The second hydraulic cylinder 27 is not necessarily required. The rising position of the first brush device 11 that does not hinder the travel (movement) of the work vehicle 1 may be detected by the detection device, and may be raised and held by the first hydraulic cylinder 26. In this case as well, the detection device is not necessarily required, and it may be set ascending position by visual observation of other workers.

  In addition to the first pilot check valve 45, the holding posture A by the first hydraulic cylinder 26 may be held by a mechanical lock mechanism, for example, a pin, or a combination thereof.

Further, in the embodiment, the front brush device 7 and the first brush device 11 are tilted at the same direction and at the same angle so as to sweep out dust or snow to the left front of the traveling direction. You may set the direction of the front brush apparatus 7 and the 2nd brush apparatus 12 so that dust or snow may be swept out to the right front of a direction.

  INDUSTRIAL APPLICABILITY The present invention can be used when performing road cleaning and snow removal work, and is particularly suitable for use when cleaning a large area such as an airfield runway or snow removal work.

It is a whole top view showing the brush cleaning work vehicle of the present invention. It is a whole side view showing the brush cleaning work vehicle of the present invention. FIG. 3 is a storage state diagram of the first brush device in an arrow view taken along line III-III in FIG. 1. It is a raising state figure of the 1st brush device by an arrow view along a III-III line in Drawing 1. It is an operation posture state figure of the 1st brush device by an arrow view along a III-III line in FIG. It is a hydraulic-drive circuit diagram of the 1st brush apparatus in the brush cleaning work vehicle of this invention. It is a top view which shows the snowplow provided with the conventional snowbrush apparatus. It is a top view which shows the general cleaning work vehicle provided with the brush roll.

DESCRIPTION OF SYMBOLS 1 Brush cleaning work vehicle 2 Car body 3 Car body frame 7 Front brush device 10 Side brush device 11 First brush device 12 Second brush device 15 Brush attachment means 16 Arm body 20 Connection body 24 Arm mechanism 25 Hydraulic mechanism 26 First hydraulic pressure Cylinder 27 Second hydraulic cylinder 31 Body 33 Brush roll A Storage posture B Working posture C Road surface W Maximum vehicle width

Claims (2)

A vehicle body that extends long along the traveling direction and includes a front wheel and a rear wheel, and a front brush device that includes a brush roll for road surface work that is mounted on the front portion of the vehicle body in the traveling direction. And
Equipped with one and the other side brush device on both sides of the central region of the vehicle body and the front side portion of the region where the rear wheel is located,
Each of the one and the other side brush devices includes a frame main body portion that rotatably supports the brush roll, a hydraulic motor for driving the brush roll provided in the frame main body portion, and a A pair of legs that are provided at both ends and support the frame body at both ends;
Each of the side brush devices and the vehicle body are each equipped with an arm mechanism that holds the side brush devices individually and vertically movable,
The arm mechanism is connected to a vertical axis that is fixedly attached to the center of the upper surface of the frame main body in advance so that the arm mechanism can rotate freely, and the entire side brush device is moved up and down via the connection body. An arm body to be moved, and a hydraulic mechanism for biasing the driving force for the vertical movement to the arm body,
A brush cleaning work vehicle comprising a means for adjusting an inclination angle of the brush roll with the vertical axis as a rotation center between the connecting body and the frame main body. In the brush cleaning work vehicle according to claim 1,
The rotational surface of the brush roll of the front brush device mounted on the front portion of the vehicle body is disposed so as to be inclined with respect to the left-right direction orthogonal to the traveling direction of the vehicle body,
At least one side brush device mounted on the same side as the direction of the rotation surface of the brush roll of the front brush device is operated in the left-right direction orthogonal to the traveling direction of the vehicle body as with the front brush device. A brush cleaning work vehicle equipped on one side surface of the vehicle body so as to be set in a state of being inclined with respect to the front and extending outward from the front brush device .

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