JPH09195238A - Snow removing device control system for rotary snow removing car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system capable of being improved in operability and reduced in cost. SOLUTION: Hydraulic actuators 31-37 for controlling the behavior of a snow removing device are controlled by operation levers L1, L2 and KL through control valves 41-44, 47 and selector valves 51, 52. The operation levers L1, L2 have push switches S1, 2. The actuator 34 is controlled with the shoot raising and falling lever KL having a low frequency of use as an exclusive lever therefor, and the other six actuators are controlled by the longitudinal and lateral operations of the mutli-way levers L1, L2 in which the push switches S1, 2 are ON or OFF. Thus, the seven actuator controls in total are collected to three operation levers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for controlling the behavior of a snow removing device mounted on a rotary snow removing vehicle.

[0002]

2. Description of the Related Art Rotary snowplows equipped with a snowplow consisting of an auger, a blower and a chute in front of the vehicle are well known. During the snow removal work, the snowplow advances while rotating the auger, scrapes the accumulated snow into the snow removal device with the auger, and throws it to the side of the road through the chute with the blower placed behind the auger. ing.

In a general rotary snowplow, the snowplow can be operated in various ways according to the work content. Normally, the behavior of a snow removing device is controlled by a hydraulic actuator such as a hydraulic cylinder or hydraulic motor. However, in a conventional snow removing device control system, a plurality of hydraulic actuators are operated by operating a large number of levers. Was controlling various types of snow removal equipment. The number of operating levers is as small as 3
The number of books, including many operated by an assistant, may reach 10 or more.

Here, an example of a conventional snow removing device control system and the contents of operation by the system will be described with reference to the drawings. FIG. 6 shows an operation lever provided in an example of a conventional snow removal device control system, which is provided in a driver seat of a rotary snow removal vehicle. The snow removal device operating levers shown in this figure have a total of 10 levers, namely, 7 levers 1 to 7 operated by a driver and 3 levers 4a to 6a operated when an assistant is on board. It consists of Each lever is a lever that controls a hydraulic actuator (not shown) for operating the snow removal device, and one lever is configured to control one hydraulic actuator. In addition, 4a for assistant ~
The levers of 6a and the levers 4 to 6 for the driver are the levers of the corresponding numbers to perform the same operation.

The lever 1 is a snow removing device lifting lever,
As shown in FIG. 7, it is a lever for vertically moving the snow removal device 20 mounted in front of the rotary snow removal vehicle 10. The snow removing device elevating lever 1 switches the control valve in four positions.

The lever 2 is a tilt lever, and as shown in FIG. 8, is a lever for tilting the snow removing device 20 left and right. By operating this lever, it is possible to perform snow removal work without being affected by irregularities on the road surface.

The lever 3 is a blower case rotating lever, and as shown in FIG. 9, a blower case (shown by a broken line in the figure) for covering the blower 22 arranged behind the auger 21 is rotated. It is a lever that tilts left and right. When the lever 3 is released at any position, the blower case stops in that state. The chute 23 is connected to the blower case and rotates together with the blower case.

The levers 4 and 4a are chute turning levers, as shown in FIG. 10, for turning the chute 23. The snow throwing direction can be changed to any position by this lever.

The levers 5 and 5a are chute expansion / contraction levers, as shown in FIG. 11, for expanding / contracting the chute 23. The chute 23 is extended when the snow is thrown away, and the chute 23 is contracted when the snow removal vehicle is forwarded.

The levers 6 and 6a are chute cap levers, and are levers for opening and closing (changing the angle) a cap 23a provided at the tip of the chute 23 shown in FIG. When the lever is released, the lever stops at the neutral position and the cap is fixed at that position. When snow is short-distanced and loaded on a dump truck, the cap opening is reduced to adjust the snow fall position.

The lever 7 is a chute raising / lowering lever, as shown in FIG. 13, for raising and lowering the chute 23. The chute 23 is erected during snow removal work, and laid down during forwarding.

As described above, in the rotary snow removal vehicle, various controls of the snow removal device can be performed by operating the lever.

[0013]

However, in the conventional snow removing device control system, one operating lever is configured to control one hydraulic actuator, so that the snow removing device can be controlled in various ways. Requires a large number of operating levers, and in some cases as many as 10 operating levers are provided as in the above example. Moreover, in the case of the above example, the driver must operate as many as seven levers while driving the snowplow when the assistant is not on board. Therefore, there is a problem that operability is poor, skill is required, and there is a high risk of erroneous operation. Also, the large number of levers has been an obstacle to cost reduction.

Further, for example, in tilting the snow removing device, the lever must be operated in the front-back direction in order to tilt the snow removing device to the left or right, or in the case of turning the chute, the turning of the chute is controlled by operating the lever back and forth. There is also a problem that the direction of lever operation does not match the direction of operation of the snow removal device, and the operability on that side is not good.

It is an object of the present invention to provide a snow removing device control system which solves the above-mentioned problems in the conventional snow removing device control system, improves operability and can reduce the cost.

[0016]

According to the present invention, there is provided a snow removal device control system for controlling the behavior of a snow removal device mounted on a rotary snow removal vehicle, comprising: a plurality of hydraulic actuators; A directional control valve for controlling the supplied hydraulic pressure direction and an operating lever for switching the valve position of the directional control valve are provided, and the operating lever controls the operating direction of the hydraulic actuator via the directional control valve. In a control system for controlling the behavior of a snow removal device, a multidirectional lever to which a plurality of the directional control valves are connected is provided as the operating lever, and the plurality of hydraulic actuators are controlled by a single operating lever that is the multidirectional lever. It is possible to switch the valve position among a plurality of directional control valves connected by the operating direction of the multi-directional lever. A selected direction control valve is carried out, is solved by a hydraulic actuator is selected, which is controlled by the operation direction of the multi-direction lever.

A second directional control valve, to which the plurality of hydraulic actuators are connected, is connected to the directional control valve, and an instruction means for instructing switching of the valve position of the second directional control valve is provided. Advantageously, by switching the valve position of the second directional control valve by the instruction means, the hydraulic actuator controlled via the directional control valve is switched.

Further, the operating direction of the multidirectional lever,
It is advantageous that the behavior direction of the snow removal device by the hydraulic actuator selected and controlled by the operation direction is matched.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram showing an embodiment of the snow removal device control system of the present invention. In the control system of this embodiment, the snow removing device (not shown) has three
It is controlled by the book operation levers L1 to L3 and the operation switch SW1. Among the levers and switches, the levers L1 and L2 and the switch SW1 are operated by a snowplow driver, and the lever L3 is operated when an assistant is on board. The operation of the system shown in this figure will be described later.

2A and 2B show a state in which the operation levers L1 to L3 and the operation switch SW1 are arranged in a driver's cab of a rotary snow removal vehicle. FIG. 2A is a plan view and FIG. 2B is a side view. is there. As shown in this figure, the operating levers L1,
The L2 and the operation switch SW1 are mounted on a pedestal 24 standing up from the floor plate of the cab via a bracket.
Further, the operation lever L3 for the assistant is attached to the console panel 25 in the cab via a bracket. Each operation lever is provided with push switches S1 to S3. The operation levers L1 to L3 are connected to a control valve (directional control valve) described later by a push-pull cable, and the operation switch SW1 and push switches S1 to S3 are selector cables described later by an electric cable.
It is connected to the valve (second directional control valve). The operation switch SW1 and the push switches S1 to S3 are instruction means for instructing the switching of the valve position of the selector valve (second directional control valve).

In the control system of this embodiment shown in FIG. 1, the snow removing device includes hydraulic actuators 31 to 37.
Is controlled by The actuator 31 is a hydraulic cylinder for moving the snow removing device up and down (see FIG. 7), and the control lever 41 is used to control the operation lever L.
Controlled by 1. The actuator 32 is a hydraulic cylinder for rotating the blower case of the snow removal device (see FIG. 9), and the actuator 33 is a hydraulic cylinder for tilting the snow removal device (see FIG. 8). The actuators 32 and 33 are controlled by the operating lever L1 via the control valve 42 and the selector valve 51. The actuator 34 is a hydraulic cylinder for raising and lowering the chute (see FIG. 13), and the actuator 35 is a hydraulic motor for turning the chute (see FIG. 10). The actuators 34 and 35 are
It is controlled by the operation lever L2 and the operation switch SW1 via the control valve 43 and the selector valve 52. The hydraulic motor 35 is also connected to the control valve 45 and can be controlled by the operating lever L3 for the assistant. The actuator 36 is a hydraulic cylinder for expanding and contracting the chute (see FIG. 11), and the actuator 37 is a hydraulic cylinder for changing the angle (see FIG. 12) to open and close the chute cap. The actuators 36 and 37 include the control valve 44 or 46 and the selector valve 5
It is controlled by the operating lever L2 or L3 via 3.

The operation levers L1 to L3 can be tilted forward and backward and left and right, only the lever L1 has four positions (including neutral) in the front and rear, and the others have three positions (including neutral). The control valves 41 to 46 are pilot type switching valves, only the valve 41 is a 4-port 4-position switching valve, and the others are 4-port 3-position switching valves. Each control valve is connected to an oil pump and an oil tank as shown by a valve 41, but the oil pump and the oil tank are omitted in the figure except for the valve 41. And selector valve 5
Reference numerals 1 to 53 are solenoid type 6-port 2-position switching valves. Furthermore, the operation switch SW1 is ON / OFF
This is a changeover switch, and switches the supply / cutoff of the 24V (volt) voltage supplied from the snowplow to the selector valve 52. Further, as described above, the operation levers L1 to
3 is provided with push switches S1 to S3. The push switches S1 to S3 are also ON / OFF switching switches, and switch the supply / cutoff of the 24V (volt) voltage supplied from the snow removal vehicle to the selector valve 51 or 53.

FIG. 3 shows the control valve 4 described above.
1 to 46 and selector valves 51 to 53 are actually arranged, (a) is a front view and (b) is a side view. As shown in this figure, each control valve and selector valve is attached to a base plate 26. The base plate 26 is supported by a frame or the like of the snow removal vehicle via a bracket 27.

FIG. 4 shows in detail the control valves 41 to 46 shown in FIG. 3, (a) being a front view,
(B) is a side view. Six control valves are used in this embodiment. Only the control valve 41 is a 4-position switching valve, and the others are 3-position switching valves.
The control valve 41 has a larger sleeve than the other valves. Further, FIG. 4B shows a state in which the hydraulic hose 29 is attached to the ports 1A and 1B of the control valve 41 via the adapter 28.

Now, the operation of the snow removal device control system of the present embodiment having the above-mentioned configuration will be described with reference mainly to FIG. In the control system of the present embodiment shown in FIG. 1, the operation lever L1 is operated back and forth to raise and lower the snow removal device. The operating lever L1 has four positions in the front and rear, and can be switched from the neutral position to one step after and two steps before. When the lever L1 is tilted rearward from the neutral position, the control valve 41 is switched to the “rear” position, the hydraulic pressure from the hydraulic pump P is sent to the contraction side oil chamber of the actuator (hydraulic cylinder) 31, and the cylinder 31 is contracted. Then, the entire snow removing device is raised. When the lever L1 is tilted one step forward from the neutral position, the control
The valve 41 is switched to the "front 1" position, the hydraulic pressure from the hydraulic pump is sent to the expansion side oil chamber of the cylinder 31, and the cylinder 31 is extended to lower the entire snow removal device. Further, when the lever L1 is tilted one step further, the control valve 41 is switched to the “front 2 (float)” position, the cylinder 31 is connected to the hydraulic tank, and the snow removing device floats, so that The weight allows the device to follow the unevenness of the road surface and clean the snow removal on fresh snow and paved road surfaces. If the lever L1 is switched to the neutral position when the snow removal device is raised or lowered, the snow removal device is held at that position (height).

In order to tilt the snow removing device, the operating lever L1 is operated to the left and right. When the push switch S1 is not pressed, no voltage is supplied to the selector valve 51, and the selector valve 51 is held at the left position in FIG.
The hydraulic pressure via the control valve 42 is supplied to the actuator (hydraulic cylinder) 33. Operating lever L1
Has three positions on the left and right, and you can operate one step each on the left and right from the neutral position. When the lever L1 is tilted to the right from the neutral position, the control valve 42 is switched to the “right” position, the hydraulic pressure from the hydraulic pump (not shown) is sent to the contraction side oil chamber of the cylinder 33, and the cylinder 33 is moved. Shrink and tilt the entire snow removal device to the right. When the lever L1 is tilted to the left from the neutral position, the control valve 42 is switched to the "left" position, the hydraulic pressure from the hydraulic pump is sent to the expansion side oil chamber of the cylinder 33, and the cylinder 33 is expanded to expand the snow removing device. Tilt the whole to the left. When the lever L1 is switched to the neutral position when the snow removal device is tilted to the left or right, the snow removal device is held at that position (inclination).

In order to rotate the blower case of the snow removing device, the push switch S1 is pushed and then the operating lever L is pushed.
Operate 1 left and right. When the push switch S1 is pressed once, the switch is turned on, the voltage is supplied to the selector valve 51, and the valve 51 is switched to the right position in FIG. As a result, the hydraulic pressure via the control valve 42 is supplied to the actuator (hydraulic cylinder) 32. In this state, when the lever L1 is tilted right or left from the neutral position, the control valve 42
Is switched to the “right” or “left” position, and the hydraulic pressure from the hydraulic pump is sent to the contraction side or expansion side oil chamber of the cylinder 32 to contract or expand the cylinder 33 to rotate the blower case left or right. When the lever L1 is switched to the neutral position when the blower case is rotated, the blower case is held in that position. In addition, in order to return the operation of the lever L1 from the rotation of the blower case to the tilt of the snow removal device, the push switch S1 may be pressed again to turn off the switch S1. If the ON / OFF state of the push switch S1 is displayed on the console panel or the like of the snowplow driver's cab, it is possible to confirm whether the operation of the blower case or the snowplow device tilt is performed by operating the lever L1 to prevent erroneous operation. Is effective for. Of course, if the operation of rotating the blower case or the operation of tilting the snow removal device is directly displayed instead of the ON / OFF state of the switch S1, erroneous operation can be prevented more reliably.

In order to turn the chute of the snow removing device, the operation lever L2 is operated to the left and right while the operation switch SW1 is off. Operation switch SW1 is O
When in FF, the selector valve 52 is held at the left position in FIG. 1, and the hydraulic pressure via the control valve 43 is supplied to the actuator (hydraulic motor) 35. The operation lever L2 has three positions on the left and right, and one operation can be performed on each of the left and right from the neutral position. When the lever L2 is tilted right or left from the neutral position, the control valve 43 is switched to the "right" or "left" position and the hydraulic motor 35 is rotated right or left to turn the chute right or left. If the lever L2 is switched to the neutral position when the chute is turned to the right or left, the chute is held in that position.

The chute turning of the snow removing device can also be performed by the operating lever L3. In addition to the selector valve 52, a control valve 45 is also connected to the hydraulic motor 35 that turns the chute. The control valve 45 is switched by the operation lever L3, and the hydraulic motor 35 is controlled by the left and right operations of the lever L3 in the same manner as the lever L2, and the shoot turning is performed. The shoot turning operation by the operation lever L3 is performed independently of the operation switch SW1.

In order to raise and lower the chute of the snow removing device, the operation switch SW1 is turned on and the operation lever L2 is operated to the left and right. When the operation switch SW1 is ON, the selector valve 52 is switched to the right position in FIG. 1, and the hydraulic pressure via the control valve 43 is supplied to the actuator (hydraulic cylinder) 34. When the lever L2 is tilted to the right or left from the neutral position, the control valve 43 is switched to the "right" or "left" position, and the hydraulic cylinder 34 is expanded or contracted to raise or lower the chute. When the lever L2 is switched to the neutral position when the chute is tilted, the chute is held at that position. When changing from the shoot raising / lowering operation to the shoot turning operation, the operation switch SW1 may be turned off. In the opposite case, the operation switch SW1 is off.
Turn on. In addition, it is similar to the push switch S1 of the operation lever L1 that it is advantageous to provide a display for preventing erroneous operation.

In order to change the angle of the chute cap of the snow removing device, the operating lever L2 or L3 is operated back and forth without pressing the push switches S2 and S3 (in a switch OFF state). When the push switches S2, 3 of the operating levers L2 and L3 are not pushed, the selector valve 53 is held at the left position in the figure. At this time, the hydraulic pressure via the control valves 44 and 46 is supplied to the actuator (hydraulic cylinder) 37. In this state, when the lever L2 or L3 is tilted forward or backward from the neutral position, the control valve 44 or 46 is switched to the "front" or "rear" position, and the hydraulic cylinder 37 is expanded or contracted to change the angle of the shoot cap. Be changed. The same control is performed by the lever L2 or the lever L3 to change the shoot cap angle. If the lever L2 or L3 is switched to the neutral position when the chute cap angle is changed, the chute cap is held at that position. In the present embodiment, the angle is changed so that the shoot cap is lowered when the operation levers L2 and L3 are operated forward (tilted away from the driver's body), and the operation levers L2 and L3 are moved backward. The angle is changed so that the shoot cap moves up when it is operated (caused in front).

To extend and retract the chute of the snow removal device, push the push switches S2 and S3 (switch ON).
The operating lever L2 or L3 is operated back and forth.
When the switches S2 and S3 are turned on, the selector valve 5
3 is switched from the position shown in the drawing to the right position, and the hydraulic pressure via the control valves 44 and 46 is supplied to the actuator (hydraulic cylinder) 36. In this state, when the lever L2 or L3 is tilted forward or backward from the neutral position, the control valve 44 or 46 is "front".
Alternatively, the chute is expanded / contracted by switching to the “rear” position and expanding / contracting the hydraulic cylinder 37. This shoot extension / contraction operation is controlled by the lever L2 or the lever L3, whichever is the same. When the lever L2 or L3 is switched to the neutral position when the chute is expanded or contracted, the chute is held at that position. In the present embodiment, the chute contracts when the operation levers L2 and L3 are operated forward (tilted in the direction of moving away), and the chute is operated when the operation levers L2 and L3 are operated backward (caused to move forward). Controlled to stretch. In addition, it is similar to the push switch S1 of the operation lever L1 that it is advantageous to perform a display for preventing an erroneous operation by turning ON / OFF the push switches S2, 3.

The operations of the chute turning, the expansion and contraction of the chute, and the change (open / close) of the chute cap angle by the operation levers L2 and L3 are the same for both levers. L
It is possible to reduce the burden on the driver by allowing the assistant to operate 3.

In this embodiment, since the snow removing device is lowered or raised by operating the operating lever L1 forward or backward, the direction of lever operation and the ascending / descending direction of the snow removing device coincide with each other. Further, since the snow removal device is tilted to the right or left by operating the operation lever L1 to the right or left, the direction of lever operation matches the tilt direction of the snow removal device. Further, when the push switch S1 is pressed (turned on), the blower case is rotated to the right or left (from the driver's perspective) by operating the operation lever L1 to the right or left. The direction of rotation matches.

Furthermore, since the chute turns right or left by operating the operating levers L2 and L3 to the right or left,
The lever operation direction and the chute turning direction match. Furthermore, when the operation switch SW1 is turned on, the chute rotates rightward or leftward and is tilted by operating the operation lever L2 rightward or leftward, so that the lever operation direction and the shoot tilting direction match. To do.

Furthermore, since the cap angle is changed (closed and opened) such that the shoot cap is lowered or raised by operating the operating levers L2 and L3 forward or backward, the lever operating direction coincides with the chute opening / closing direction. . Furthermore,
Push switches S2 and S3 were pressed (turned on)
In this case, since the chute contracts or extends due to the operation of the operation levers L2 and L3 forward or backward, the lever operation direction and the chute expansion / contraction direction match.

As described above, in this embodiment, the three operation levers (and one operation switch) are used to raise and lower the snow removal device, tilt the blower case, rotate the chute, turn the chute, extend and retract the chute, and shoot the cap. Since the opening and closing can be controlled, the number of operating levers can be significantly reduced compared to the conventional control system, and the lever selection can be facilitated and erroneous operation can be prevented. Also, the reduction in the number of levers can contribute to cost reduction. Furthermore, using the multi-directional lever that can be operated front and back and left and right, the lever operation direction and the direction of the behavior of the snow removal device due to it match, so it is possible to control each part of the snow removal device according to the image of the operator. It is possible to improve the sex.

Next, another embodiment of the present invention will be described. The snow removal device control system of this embodiment does not include an operation lever for an assistant, and is operated by a snowplow driver alone.

In the control system of this embodiment shown in FIG. 5, a snow removing device (not shown) is controlled by three operating levers L1, L2 and KL. The operation lever KL is a lever exclusively for raising and lowering the chute of the snow removing device, and like the other operation levers, is connected to the control valve 47 by a push-pull cable. The chute of the snow removing device is erected during the snow removing work and is laid down so as not to obstruct the field of view when forwarding the snow removing vehicle, and it is rare to raise and lower the chute during the snow removing work. Therefore, the lever operation for raising and lowering the chute is often limited to the start and end of snow removal work, and by using this as a dedicated lever, operations other than the raising and lowering of the chute can be concentrated on the remaining levers. Therefore, it is possible to improve the operability by reducing the number of levers operated during snow removal work.

In the control system shown in this figure, the structure and operation relating to the operating lever L1 are the same as those of the above-described embodiment described with reference to FIG.

The operating lever L2 operates the chute turning hydraulic motor 35 via the control valve 43, and
The chute expansion / contraction hydraulic cylinder 36 and the chute cap opening / closing (angle adjustment) hydraulic cylinder 37 are controlled via the control valve 44 and the selector valve 53. The control operation of the hydraulic cylinders 36 and 37 by the operating lever L2 is the same as that of the above-described embodiment described with reference to FIG.

In the present embodiment, the lever K for exclusive use of shooting and raising / lowering is used.
Since L is provided, the chute turning hydraulic motor 35 is directly connected to the control valve 43 without a selector valve. Hydraulic motor 35 by operating lever L2
The control operation, that is, the chute turning control of the snow removing device, is the same as that of the above-described embodiment described with reference to FIG.

The lever KL exclusively for raising and lowering the chute is a lever that can be tilted in the left-right direction, while the other levers L1 and L2 can be tilted in the front-rear direction and the left-right direction. This lever K
L controls a cylinder 34, which is a chute raising / lowering actuator, via a control valve 47. The shoot raising / lowering lever KL has three positions on the left and right, and one operation can be performed on each of the left and right from the neutral position. When the lever KL is tilted to the right or left from the neutral position, the control valve 47 is switched to the "right" or "left" position, and the hydraulic cylinder 34 is expanded or contracted to raise or lower the chute. If the lever KL is switched to the neutral position when the chute is tilted, the chute can be held at that position.

In the control system of this embodiment, since the assistant operation lever is not provided, the snow removing device can be controlled with only three operation levers. In addition, since a dedicated lever KL is provided as a lever for invoking the chute that is rarely used, 6 types of operations other than raising and lowering the chute, elevating and tilting the snow removal device, rotating the blower case, turning the chute, expanding and contracting and opening and closing the chute cap are performed. It can be controlled with only two operating levers.

[0045]

As described above, according to the snow removal device control system of the present invention, the control of a plurality of hydraulic actuators can be integrated into one operation lever (multidirectional lever) to realize multiple functions. In comparison, the number of operating levers can be greatly reduced, erroneous operation can be prevented, and cost can be reduced.

According to the second aspect of the invention, the number of hydraulic actuators that can be controlled by one operating lever can be increased, so that the number of operating levers can be further reduced.

According to the third aspect of the present invention, the operating direction of the lever and the movement direction of the snow removing device thereby coincide with each other, so that the operability can be improved.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a snow removal device control system of the present invention.

2A and 2B show a state in which an operating lever and an operating switch in the system are arranged in a driver's cab of a rotary snow removal vehicle, where FIG. 2A is a plan view and FIG. 2B is a side view.

3A and 3B show a state where a control valve and a selector valve in the system are actually arranged, FIG. 3A is a front view and FIG. 3B is a side view.

4 is a detailed view of the control valve shown in FIG. 3, in which (a) is a front view and (b) is a side view.

FIG. 5 is a system configuration diagram showing another embodiment of the present invention.

FIG. 6 is a perspective view showing an operation lever provided in an example of a conventional snow removal device control system.

FIG. 7 is a schematic diagram for explaining the lifting and lowering of a snow removing device for a rotary snow removal vehicle.

FIG. 8 is a schematic diagram illustrating tilting of the snow removing device for a rotary snow removal vehicle.

FIG. 9 is a schematic diagram illustrating rotation of a blower case of the snow removal device.

FIG. 10 is a schematic diagram illustrating a chute turning of the snow removal device.

FIG. 11 is a schematic diagram illustrating expansion and contraction of a chute of the snow removal device.

FIG. 12 is a schematic diagram illustrating opening and closing of a chute cap of the snow removal device.

FIG. 13 is a schematic diagram illustrating raising and lowering of a chute of the snow removal device.

[Explanation of symbols]

 10 rotary snow removal vehicle 20 snow removal device 22 blower 23 chute 23a chute cap 31-37 hydraulic actuator 41-47 control valve 51-53 selector valve L1-L3 operation lever KL chute raising / lowering lever S1-S3 push switch SW1 operation switch

Claims (3)

[Claims] 1. A snow removal device control system for controlling the behavior of a snow removal device mounted on a rotary snow removal vehicle, comprising: a plurality of hydraulic actuators; and a directional control valve for controlling a hydraulic direction supplied to the hydraulic actuators. A control system having an operation lever for switching the valve position of the directional control valve, wherein the operation lever controls the operation direction of the hydraulic actuator via the directional control valve to control the behavior of the snow removal device. A multi-directional lever to which a plurality of directional control valves are connected is provided as a lever, and a plurality of hydraulic actuators can be controlled by a single operating lever that is the multi-directional lever, and the multi-directional lever can be operated by A directional control valve whose valve position is switched is selected from among the connected directional control valves, and the multi-directional valve is selected. Snow removal device control system, characterized in that the hydraulic actuator is selected, which is controlled by the operating direction of over. 2. A directional control valve is connected with a second directional control valve to which a plurality of the hydraulic actuators are connected, and an instruction means for instructing a valve position switching of the second directional control valve is provided, The snow removal device control system according to claim 1, wherein a hydraulic actuator controlled via the directional control valve is switched by switching the valve position of the second directional control valve by the instruction means. . 3. The operation direction of the multi-directional lever and the movement direction of the snow removal device by the hydraulic actuator that is selected and controlled by the operation direction are matched with each other. Snow removal device control system.