JPH08333732A - Device for adjusting grounding width of brush roll - Google Patents

Abstract

PURPOSE: To uniformize an extent of grounding width over the full length of a brush roll by measuring a tilt angle in a rocker body, operating a diameter of this brush roll, and making a brush body move up and down after defining the grounding width of the brush roll as the set value. CONSTITUTION: A rocker body 23 is made to come into contact with the outer surface of a brush roll 4, finding a tilt angle, and a diameter of this brush roll 4 is operated, thereby setting an extent of grounding width of the brush roll 4. Then, in order to make this grounding width turn to the set value, a brush body 3a is moved up and down to a supporter 3b by a driving means. With this constitution, the grounding width of the brush roll 4 is uniformly adjsutable to the setting width, and thus this grounding width is made automatically settable according to snow quality in time of snow removal and an amount of snow covering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning a road surface such as a road or a runway of an airfield, and particularly for adjusting a ground contact width of a brush roll for removing snow.

[0002]

2. Description of the Related Art Generally, a cleaning vehicle for cleaning a road surface is
The traveling vehicle body is equipped with a brush device having a roll-shaped cleaning brush (hereinafter referred to as a brush roll) that is rotationally driven. Such a cleaning vehicle cleans the road surface by running the vehicle body while rotating the brush roll in contact with the road surface.

The cleaning performance of the brush roll largely depends on the sweep surface width of the brush roll, that is, the ground contact width of the brush roll. That is, unless the brush roll is grounded with a proper grounding width according to the condition of the road surface, it may not be possible to perform sufficient cleaning. Generally, if the ground contact width of the brush roll is too small, cleaning will be insufficient, and if the ground contact width is too large, the brush roll will be excessively worn. Furthermore, if the brush roll is not grounded parallel to the road surface and the ground contact width is different at both ends of the brush roll, uniform road surface cleaning cannot be performed, and uncleaned parts can be left uncleaned, and the brush roll is also worn. It will not be uniform. In particular, in the case of a snowplow, the snow removal direction is switched between diagonally forward left and diagonally right forward depending on the wind direction. In that case, if the brush roll is turned diagonally leftward or diagonally rightward, the center of gravity of the snow removal brush device will be changed. The imbalance causes the parallelism of the brush roll to collapse, resulting in a gap in the ground contact width at both ends of the brush roll. Therefore, it is necessary to readjust the ground contact widths at the left and right ends of the brush roll each time the snow removal direction is switched between diagonally forward left and diagonally forward right.

Therefore, conventionally, the brush device is provided with an adjusting mechanism capable of changing the ground width of the brush roll within a certain range, and the ground width of the brush roll is set to an appropriate value by this adjusting mechanism. To improve the cleaning performance.

FIG. 7 shows a snow removing brush device 80 which is an example of a brush device. As shown in FIG. 7A, the snow removing brush device 80 is attached to the front end of the chassis of the vehicle body 88 via a connecting body 81, and has a brush body 80a having a brush roll 83 that can be rotated.
And the brush body 8a provided on both sides of the brush body 80a.
And a support 80b having a support tire 85 that supports 0a. In addition, the snow removal brush device 80
Is attached to the connecting body 81 so as to be rotatable about a swing shaft 89, and is also swingable about a swing shaft (not shown).

Further, as shown in FIG. 7B, the snow removing brush device 80 is provided with an adjusting mechanism for relatively moving the brush body 80a and the support body 80b in the vertical direction. Specifically, an adjusting screw 87 is provided, and when the adjusting screw 87 is turned clockwise by a tool, for example, the supporting tire is lowered and the brush roll 83 is raised, and when the adjusting screw 87 is turned counterclockwise. As the supporting tire rises, the brush roll 83 descends. By this operation, the brush body 80a
Tire 8 that is constantly grounded on the road surface 90 under the load of
The brush roll 83 moves up and down with respect to 5, so that
The ground contact width B of the brush roll 83 with respect to the road surface 90 (see (c) of FIG. 7) changes.

In the structure shown in FIG. 7, the operator manually rotates the adjusting screw 87 to sensuously adjust the ground contact width B of the brush roll 83. However, a device for automatically controlling the ground contact width adjusting operation is provided. JP-A-3-115
No. 610 is disclosed.

In the device disclosed in this publication, the diameter of the brush roll 83 is detected by a sensor, and the controller drives the adjusting mechanism based on the detected diameter to set the target contact width of the brush roll. It automatically adjusts to. Specifically, a probe that is movable toward the brush roll is provided, and the diameter of the brush roll is obtained from the amount of movement of the probe until the probe contacts the rotating brush roll and vibrates. . The vibration of the probe is detected by the acceleration sensor, the amount of movement of the probe is measured by the distance measuring device, and these signals are sent to the control device, and the brush according to the diameter of the brush roll and thus the target grounding width. The moving amount of the roll (driving amount of the adjusting mechanism) is determined.

[0009]

By the way, in the structure of the manual adjustment shown in FIG. 7, when the height adjustment (adjustment of the ground contact width) of the brush roll is necessary within a predetermined short snow removal time, Workability is poor because the operator has to get out of the driver's seat and turn the adjusting screw with a tool. Especially, when the snow removal direction is switched diagonally forward left or diagonally forward right, the gap between the ground contact widths at both ends of the brush roll caused by the imbalance of the center of gravity of the snow removal brush device is installed at both ends of the brush roll. In addition, each adjustment screw must be corrected by adjusting the adjustment screw separately, and the work is extremely complicated.

Further, since the height of the brush roll is adjusted by the operator's intuition, the ground contact width of the brush roll may not be accurately set to an appropriate ground contact width according to the condition of the road surface.

On the other hand, according to the automatic adjustment structure disclosed in Japanese Patent Laid-Open No. 3-115610, workability can be improved, and the ground contact width of the brush roll can be adjusted appropriately according to the condition of the road surface. It is possible to set the contact width accurately, but the structure is complicated because various complicated sensors and devices such as distance measuring device, probe moving device or acceleration sensor are required for automatic adjustment. Therefore, the cost becomes high. In addition, electrical trouble may occur.

The present invention has been made in view of the above circumstances, and its purpose is to automatically set the ground contact width of a brush roll to an appropriate ground contact width according to the condition of the road surface by a simple mechanism. Another object of the present invention is to provide a ground contact width adjusting device for a brush roll capable of uniformly setting the ground contact width over the entire length of the brush roll.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a brush body that rotatably supports a cleaning brush roll that can be grounded on a road surface. A device for adjusting the ground contact width of the brush roll with respect to the road surface by moving the brush body relative to the body, and driving means for moving the brush body relative to the support body, and swinging the brush body. Pivotally supported,
An oscillating body capable of contacting the outer surface of the brush roll in a tangential direction, an angle measuring means for measuring an inclination angle of the oscillating body, and a ground width setting means for setting a ground width of the brush roll to a desired ground width. And the diameter of the brush roll is calculated from the tilt angle of the oscillator measured by the angle measuring means, and the brush roll diameter obtained by this calculation and the brush roll ground width set by the ground width setting means are set. And a driving means for driving the driving means so that the distance between the rotation center of the brush roll and the road surface matches the setting distance. And control means for controlling.

[0014]

According to the above construction, the setting means of the brush roll ground width is set by the ground width setting means, and the oscillating body is brought into contact with the outer surface of the brush roll. The drive is controlled and the ground contact width of the brush roll is automatically adjusted to the set width evenly on the left and right. In particular, in the case of a snowplow, the ground contact width can be automatically set according to the quality of snow and the amount of snow when removing snow.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A snowplow 1 is shown in FIG. This snow removal vehicle 1 is composed of a traveling vehicle body 2 on which a work engine is mounted and an air nozzle 10 and the like are mounted, and a snow removal brush device 3 attached to a front end portion of a chassis of the traveling vehicle body 2 via a connecting body 8. .

The brush device 3 has a long brush body 3a connected to the joint body 8 and extending in the width direction of the vehicle body 2, and supports 3b provided on both sides of the brush body 3a for supporting the brush body 3a. , 3b.
In this case, the brush body 3a is rotatably supported by the connecting body 8 and is rotated by expanding and contracting the hydraulic cylinder 7 installed between the connecting body 8 and the brush body 3a. It is possible to turn left and right around the shaft 9.

The brush device 3 has a brush body 3a.
The roll-shaped snow removing brush 4 (hereinafter, referred to as a brush roll 4) is rotatably driven by the hydraulic motor 11 in the portion.
have. Further, the brush device 3 has the support 3
Supporting tires 13 that are grounded on the road surface and receive the load of the brush device 3 are provided at portions b and 3b, and the support tires 13 can follow the traveling of the vehicle body 2.

In the figure, 5 is a shatterproof cover for preventing the snow swept by the snow removing brush 4 from scattering, and 6 is a hydraulic line for supplying pressure oil to the hydraulic motor 11.

FIG. 2 shows the details of the brush device 3. As described above, the brush device 3 includes the brush body 3a and the support bodies 3b and 3b.
Is a connecting body 8 extending in the width direction of the vehicle body 2 and at a substantially central portion thereof.
The main body 14 is rotatably supported by the tip 8b and the brush roll 4 extends along the longitudinal direction of the main body 14. The brush roll 4 is formed by planting bristles around a long shaft member 12 into a roll shape, and the shaft member 12 is rotatably attached to the main body portion 14 via a connecting member 44. There is. A scattering prevention cover 5 is attached to the main body 14 to prevent the snow swept out by the rotation of the brush roll 4 from scattering. The scattering prevention cover 5 is located at a predetermined distance from the brush roll 4, and covers the front of the brush roll 4 over substantially the entire length thereof.

On both sides of the body portion 14, the body portion 14
Arm portions 15, 15 that connect the to the respective support bodies 3b, 3b are extended toward the vehicle body 2 side. Further, on both sides of the main body portion 14, a measurement plate 23 that can contact the outer surface of the brush roll 4 in a tangential direction is swingably attached. The measuring plate 23 can rotate downward due to its own weight to come into contact with the outer surface of the brush roll 4 in a tangential direction, and
The measurement plate storage mechanism 69 (not shown in FIG. 2) shown in FIG. 5A rotates it upward and stores it in the storage position shown by the dotted line in FIG. In this case, the measurement plate 2
The axes of the swing shaft 24 of No. 3 and the shaft member 12 of the brush roll 4 are on the same plane perpendicular to the road surface 35 and are parallel to each other.

Although not shown in FIG. 2, the amount of rotation of the measuring plate 23, specifically, a line connecting the swing center of the measuring plate 23 and the rotation center of the brush roll 4 and the measuring plate 23 are Formed angle θ (the plane including the swing shaft 24 and the shaft member 12 and the measurement plate 2
An angle measuring means for obtaining an angle θ formed by 3 and the following, referred to as an inclination angle θ (see FIG. 4) is provided. This angle measuring means is, for example, an angle meter including an encoder, a potentiometer, etc. (see (a) of FIG. 5), and the inclination angle θ when the measuring plate 23 contacts the outer surface of the brush roll 4 in the tangential direction. Can be read electrically.

On the other hand, the support bodies 3b, 3b provided on both sides of the brush body 3a include a drive device 60 (see FIG. 5) for vertically moving the brush body 3a, and a support tire 13 for supporting the brush body 3a. have.

The drive device 60 includes a hydraulic motor 32 and a worm gear 30 driven by the hydraulic motor 32.
And a rotary shaft 19 which is rotatably driven by the worm gear 30 and has an external thread formed on its outer peripheral surface. The worm gear 30 is composed of a worm 30a and a worm gear 30b that meshes with the worm 30a, as shown in the drawing.

The rotary shaft 19 is the housing 1 of the support 3b.
6 is arranged in the first accommodating portion 16a, and meshes with the connecting member 20 fixed to the tip of the arm portion 15 of the brush body 3a. That is, the connecting member 20 has the rotating shaft 19
Has a female screw that meshes with the male screw of the above, and the brush body 3a and the support body 3b are coupled by the meshing of the screw of the coupling member 20 and the screw of the rotary shaft 19.

Therefore, according to this structure, the worm gear 30 is driven by the hydraulic motor 32 to drive the rotary shaft 19
When is rotated, the connecting member 20 moves up and down along the longitudinal direction of the rotating shaft 19. With the vertical movement of the connecting member 20, the arm portion 15 moves up and down, and the brush body 3a moves up and down.

In order to allow the brush body 3a to move up and down, the connecting body 8 has parallel link mechanisms 26a, 26.
b is provided. This parallel link mechanism 26a, 26
b, when the brush body 3a moves up and down as described above,
The connecting body 8 is swung up and down with respect to the front end of the chassis of the vehicle body 2.

Support tire 13 provided on the support 3b
Is rotatably attached to a support shaft 18 that supports it. The support shaft 18 is rotatably held in the second housing portion 16b of the housing 16.

A length meter 21 is fixedly provided on the housing 16 of the support 3b. A measure 22 made of a wire or the like can be fed out from the length meter 21, and an end portion of the measure 22 is fixed to a lower end surface of the arm portion 15. According to this configuration, the brush body 3a
The measure 22 is fed out from the length meter 21 or pulled in by the length meter 21 as it is moved up and down. Therefore,
The distance L (see FIG. 4) between the length meter 21 and the lower end surface of the arm 15 that changes with the vertical movement of the brush body 3a is
It can be measured from the feed amount of the measure 22 fed from the length meter 21.

A drive circuit 61 for driving the hydraulic motor 32 is shown in FIG. As shown, the hydraulic motor 32
The supply of pressure oil from the main pump 36 is controlled by the direction switching valve 37. This direction switching valve 37
Is formed as a pilot pressure operated valve having a neutral position B (position in FIG. 3) for stopping the supply of pressure oil to the hydraulic motor 32 and two supply positions A and C for rotating the hydraulic motor 32 in the forward and reverse directions. ing. When the direction switching valve 37 is switched to either of the supply positions A and C by the pilot pressure, the hydraulic motor 32 rotates normally or reversely, and the rotary shaft 19 rotates normally or reversely via the worm gear 30. As a result, the brush body 3a moves up or down.

The pilot pressure for switching the direction switching valve 37 is sent from the hydraulic pump 39 to the direction switching valve 37 via the pilot valves 38, 38. In this case, the valve switching operation of the pilot valves 38, 38 is controlled by the control signal from the control unit 40.

Next, the control unit 40 will be described. Figure 5
As shown in (a) of FIG.
It has a comparison section 42 and a control signal transmission section 43. The controller 40 includes an angle meter for measuring the inclination angle θ of the measurement plate 23 described above, and a target ground contact width B ′ (hereinafter, referred to as a target width B ′ of the brush roll 4 provided on the dashboard of the cab of the vehicle body 2).
Set width B '. ) Setting unit 65 for setting
A length meter 21 installed on the support 3b and a rotation detector 45 (for example, a limit switch) that detects the horizontal rotation direction of the brush 3a are electrically connected to each other. Then, the angle information obtained by the goniometer (the inclination angle θ of the measuring plate 23 when the measuring plate 23 contacts the outer surface of the brush roll 4)
And the set width B set by the operator in the ground width setting section 65
'And the rotation direction detected by the rotation detection unit 45 are input to the calculation unit 41 of the control unit 40, and the distance L measured by the length meter 21 (the length meter 21 and the lower end surface of the arm unit 15). The distance L) between and is input to the comparison unit 42.

The calculation unit 41 of the control unit 40 calculates the inclination angle θ of the measuring plate 23 obtained from the goniometer when the brush roll contacts.
And the set width B ′ input from the ground width setting unit 65, between the rotation center of the brush roll 4 and the road surface 35 when the ground width B of the brush roll 4 is set to the set width B ′. A distance x (hereinafter, referred to as a set distance x '... see FIG. 4) is calculated. Specifically, paying attention to the fact that the distance L changes due to the change in the distance x accompanying the vertical movement of the brush body 3a,
As a value representing the set distance x ′, a distance L (hereinafter, set distance) between the length meter 21 and the lower end surface of the arm portion 15 when the ground contact width B of the brush roll 4 is set to the set width B ′. L '
Say. ) Is calculated. The calculation method of this set distance L'is shown below.

As shown in FIG. 4, when the inclination angle θ of the measuring plate 23 when the measuring plate 23 is tangentially contacted with the outer surface of the brush roll 4, the swing center of the measuring plate 23 and the brush roll 4 are determined. Since the distance S from the rotation center is a known constant, the radius D / 2 of the brush roll 4 that changes momentarily due to wear can be obtained from the following equation (1).

D / 2 = S sin θ (1) Further, the distance x between the rotation center of the brush roll 4 and the road surface 35, the ground contact width B of the brush roll 4, and the brush roll 4
From the Pythagorean theorem, the relationship with the radius D / 2 can be expressed as x ² + (B / 2) ² = (D / 2) ² (2).

The distance between the center of rotation of the brush roll 4 and the lower end surface of the arm portion 15 is h, the sinking amount of the support tire 13 due to the load of the brush device 3 is Z, the ground contact surface of the support tire 13 and the arm portion. If the distance from the lower end surface of 15 is H, then a relational expression such as x + h = H−Z (3) holds.

In this case, the distance h is a known constant, and the sinking amount Z is also input to the arithmetic unit 41 as a constant. That is, the sinking amount Z of the support tire 13 is calculated by calculating the load applied to the left and right support tires 13 and 13 when the brush body 3a is directed diagonally forward left and forward, respectively. Since it can be determined from the load-sunk amount diagram of the supporting tire based on this, the data of the sunk amount Z according to the rotating direction of the brush body 3a is input in advance as a constant to the calculation unit 41. Therefore, for example, when the brush body 3a is directed diagonally leftward and forward, the detection unit 45 that detects the horizontal rotation direction of the brush body 3a detects this and sends the detection signal to the calculation unit 41. As a result, the calculation unit 41 determines the sink amount Z _L1 of the left support tire 13 and the sink amount Z _R1 of the right support tire 13 from the sink amount data input in advance.

The contact surface of the supporting tire 13 and the length meter 2
Since the distance to 1 is also a known constant, L + H = constant (4) holds.

Therefore, the set width B'of the brush roll 4 is
Is set and the inclination angle θ of the measurement plate 23 is known,
From the formulas (1) and (2), the setting width B ′ of the brush roll 4
The value of the distance x corresponding to
From this value x ′ and the equations (3) and (4), the distance L corresponding to the set width B ′ of the brush roll 4, that is, the set distance L ′ is obtained.

The set distance L'obtained by such a calculation method is input to the comparison unit 42 of the control unit 40 shown in FIG. The comparison unit 42 has an actual distance L between the length meter 21 input from the length meter 21 and the lower end surface of the arm unit 15, and a set distance L input from the calculation unit 41.
′ Is compared, and if they do not match, a signal to that effect is input to the control signal transmission unit 43. Control signal transmitter 4
Receiving this signal, 3 sends a control signal for driving the drive device 60 in a predetermined rotation direction to the drive circuit 61.

In the drive circuit 61, the valve operation of the pilot valve 38 is controlled by this drive control signal, and the pilot pressure from the hydraulic pump 39 is sent to the direction switching valve 37 via the pilot valve 38. As a result, the direction switching valve 37 is switched to either one of the supply positions A and C corresponding to the control signal. As a result, the main pump 36
Pressure oil from the hydraulic motor 3 is supplied to the hydraulic motor 32.
2 rotates in a predetermined direction.

When the hydraulic motor 32 is rotated in a predetermined direction corresponding to the control signal, the rotary shaft 19 is rotated in a predetermined direction via the worm gear 30 as shown in FIG. The arm portion 15 moves up or down so that the distance L between the total 21 and the lower end surface of the arm portion 15 becomes the set distance L '. As the arm unit 15 moves up and down, the measure 22 of the length meter 21 is extended or retracted. Information on the distance L measured by the amount of extension of the measure 22 is transferred from the length meter 21 to the comparison unit 42. It is constantly sent and is also sent to and displayed on the display unit 66 installed in the cab. Then, when the measured distance L between the length meter 21 and the lower end surface of the arm portion 15 matches the set distance L ', the comparison portion 42 sends a signal to that effect to the control signal transmission portion 43 and also transmits the control signal. Upon receiving this signal, the unit 43 sends a control signal to the drive circuit 61 to stop the drive device 60.

By this stop control signal, the pilot valve 3
8 is controlled, and the direction switching valve 37 is switched to the neutral position B. As a result, the main pump 36
Supply of pressure oil from the hydraulic motor 32 to the hydraulic motor 32 is stopped, and the hydraulic motor 32 is stopped. Therefore, the brush body 3a
Movement stops and the contact width B of the brush roll 4 is the set width B
´ is set and maintained.

At this time, the control signal transmitting section 43 sends a control signal to the measuring plate storing / driving mechanism 69, and the measuring plate storing / driving mechanism 69 receives this signal and stores the measuring plate 23 in the storing position (FIGS. 2 and 4). (Dotted line position of). Of course, this storing operation may be performed manually.

The above control is performed by the brush body 3a.
The support bodies 3b are provided on both sides of the brush body 3a, so that the brush bodies 3a are separately processed on the left and right sides. Next, a case of performing snow removal work on a runway by the snow removal vehicle 1 including the brush device 3 of the present embodiment will be described with reference to the flowchart of FIG.

First, transport the snowplow 1 to the end of the runway,
Put the snowplow 1 at the snowplow start position. At this time, the snow removal direction is determined by the wind direction, and the brush roll 4 is turned in that direction. Then, the ground contact width of the brush roll 4 is determined according to the quality of snow (snow density) and the amount of snow accumulated on the runway. The determined contact width is set to the contact width setting unit 65.
Input as the setting width B'to, and turn on the brush set switch provided in the driver's seat. Brush set switch is O
When it is N, the measurement plate 23 held in the storage position is
The holding state is released, and it rotates by its own weight and comes into contact with the outer surface of the brush roll 4 in a tangential direction. Of course, this operation may be performed manually.

The control unit 40 calculates the set distance L'according to the set width B'set by the ground contact width setting unit 65 and the angle information θ of the measuring plate 23 obtained from the goniometer. in this case,
Based on the information from the detection unit 45 that detects the left and right rotation directions of the brush body 3a, the sunk amount Z of the support tire 13 corresponding to the rotation direction of the brush body 3a (the left diagonal direction or the right diagonal direction) is calculated by the calculation unit 41. Is used in the calculation.

Then, the control section 40 separately drives the driving device 60 of each of the left and right supports 3b so that the distance L between the length meter 21 and the lower end surface of the arm section 15 becomes a set distance L '. Then, the brush body 3a is moved up and down. During this ascending / descending operation, the control unit 40 compares the set distance L ′ with the distance L measured by the length meter 21, and if the set distance L ′ and the measured distance L do not match, the drive device 60 continues. Is driven, and when the set distance L ′ and the measured distance L match, the driving device 60 is stopped. This allows the brush roll 4
The ground contact width B is set to the set width B ′ and maintained. At this time, the measuring plate 23 is also returned to the storage position by the drive mechanism 69. Of course, this operation can also be performed manually.

The end of such a series of operations is notified to the operator by the lamp display of the brush set switch. That is, when the brush set switch is turned on, the switch lamp is turned on, and when the ground width of the brush roll 4 is set to the set width and the measuring plate 23 is stored, the switch lamp is turned off.

In this state, this time, the brush body 3a is rotationally driven and the vehicle body 2 is run to start the snow removal work. During the work, the brush roll 4 removes snow and the remaining snow is blown off to the side by the air nozzle 10 while the traveling road surface 3 is removed.
After removing 5 snow and making a U-turn, rotate the brush roll 4 to the opposite side if necessary. At this time, the snow removal work is restarted after readjusting the deviation of the ground contact width B.

As described above, the brush device 3 according to the present embodiment is controlled only by setting the set width B'in the ground contact width setting section 65 and bringing the measuring plate 23 into contact with the outer surface of the brush roll 4. The section 40 controls the driving of the left and right driving devices 60, and the ground contact width of the brush roll 4 is automatically adjusted to the set width B ′. Therefore, the ground contact width of the brush roll can be accurately set to an appropriate ground contact width according to the snowfall state, and the workability is improved.

When the brush body 3a is directed diagonally to the left or to the right, the sinking amount Z of the left and right support tires 13 is different and the set distance L'is also different on the left and right sides. In the embodiment, since the support bodies 3b are provided on both the left and right sides of the brush body 3a and the adjustment control of the ground contact width B is performed independently on the left and right sides, regardless of the state (different) of the sinking amount Z of the left and right support tires 13. The contact width B of the brush roll 4 can be set to be uniform on the left and right (uniform over the entire length).

In order to perform such automatic control, in this embodiment, a measuring plate 23 is provided which can rotate downward by its own weight and come into contact with the outer surface of the brush roll 4 in a tangential direction. The set distance L ′ is calculated from the inclination angle θ of the measuring plate 23 and the set width B ′, and drive control of the drive device 60 is performed. That is, unlike the above-described conventional technique, a complicated device or sensor such as a probe for obtaining the diameter of the brush roll 4, a device for moving the probe, and a sensor for detecting vibration of the probe is not used. The brush body 3a can be moved up and down so that the diameter of the brush roll 4 is obtained by a simple measuring means and the ground contact width B of the brush roll 4 is set to the set width B '. As described above, since the brush grounding width can be automatically set with a simple mechanism, the cost can be kept low and no electrical trouble occurs.

[0053]

As described above, according to the present invention,
With a simple mechanism, the ground contact width of the brush roll can be automatically set to an appropriate ground contact width according to the condition of the road surface (for example, in the case of snowy road surface, the condition of the snow quality and the amount of snow when removing snow), Further, the ground contact width can be set uniformly over the entire length of the brush roll.

[Brief description of drawings]

FIG. 1 is a perspective view of a snow plow equipped with a device according to an embodiment of the present invention.

FIG. 2 is a side view of the brush device.

FIG. 3 is a drive circuit diagram for driving a brush device.

FIG. 4 is a side view of the brush device in which dimensions required to calculate a calculated value are displayed.

FIG. 5 is a block diagram of control means for controlling the drive of the brush device.

FIG. 6 is a flowchart showing the operation of the brush device.

FIG. 7 is a perspective view showing an example of a conventional brush device.

[Explanation of symbols]

3 ... Brush device, 3a ... Brush body, 3b ... Support body, 4 ...
Brush rolls, 23 ... Measuring plate (oscillating body), 40 ... Control section (control means), 60 ... Driving device (driving means).

Claims (3)

[Claims] 1. A road surface of the brush roll, wherein a brush body that rotatably supports a cleaning brush roll that can be grounded on a road surface is relatively moved with respect to a support body that supports the brush body on both sides. A device for adjusting the ground contact width with respect to the driving means, the driving means moving the brush body relative to the support body, and pivotally supported by the brush body so as to tangentially contact the outer surface of the brush roll. A possible rocking body, an angle measuring means for measuring the tilt angle of the rocking body, a grounding width setting means for setting the grounding width of the brush roll to a desired grounding width, and the angle measuring means. The diameter of the brush roll is calculated from the inclination angle of the oscillating body, and the brush roll diameter obtained by this calculation and the set value of the brush roll ground width set by the ground width setting means Calculating means for calculating the set distance between the rotation center of the roll and the road surface, and control for controlling the drive of the driving means such that the distance between the rotation center of the brush roll and the road surface matches the set distance. An apparatus for adjusting the ground contact width of a brush roll, comprising: 2. A length measuring means for measuring a length between a predetermined portion of the support body and a predetermined portion of the brush body, wherein the computing means comprises the predetermined portion of the support body and the brush body. A set length with respect to a predetermined part is calculated based on the set distance, and the control means drives the driving means so that the length measured by the length measuring means matches the set length. The device of claim 1, wherein the device controls. 3. A road surface of the brush roll, wherein a brush body that rotatably supports a cleaning brush roll that can be grounded on the road surface is moved relatively to a support body that supports the brush body on both sides. In the method of adjusting the ground contact width to the outer surface of the brush roll, the ground contact width setting means inputs a set value of the ground contact width of the brush roll, and the swing body pivotally supported by the brush body is rotated to rotate the outer surface of the brush roll. To the outer surface of the brush roll in a tangential direction, and calculate the diameter of the brush roll from the inclination angle of the oscillating body that is tangentially in contact with the outer surface of the brush roll. The set value is used to calculate the set distance between the rotation center of the brush roll and the road surface, and the brush is set so that the distance between the rotation center of the brush roll and the road surface matches the set distance. Method for adjusting the contact width of the brush roll, characterized in that for relatively moving the body relative to the support.