JPH0535149Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an improvement of a road surface leveling device for a snow removal truck, and more specifically, a road surface leveling device that can easily change the snow removal area of the blade relative to the vehicle path. This device is capable of safely, reliably, and efficiently removing snow from the roadside without causing the vehicle to approach a dangerous roadside.

[Problems to be solved by conventional techniques and ideas]

In recent years, with the development of road transportation, expressways have been significantly extended regardless of whether it is a snowy country or not, and arterial roads such as national highways are also changing to high-standard roads such as suburban bypasses. In addition, as the number of traffic vehicles increases and speeds increase, there is a need to improve the efficiency of snow removal operations.
Road surface leveling devices for snow removal trucks, which are capable of high-speed snow removal and snow compaction, are now attracting much attention.

By the way, many proposals have been made regarding snow removal technology that increases the height of the blade to cope with deep snowfall, but unfortunately, there have been no examples of effective development of technology that can remove snow over a wide area in the width direction of the road. The reality is that snow removal trucks are driven over and over again, one lane at a time.

Furthermore, when removing snow using conventional snowplows, in order to ensure roadside snow removal, the vehicle must move as close to the roadside as possible, which poses the risk of the vehicle coming into contact with guardrails, etc. It was hot. In order to avoid this danger, it is possible to make the blade wider, but in this case the blade becomes a hindrance to the movement of other traffic vehicles, and there is a strong need for technological improvements in this regard. It depends on what happened.

The present invention was developed in view of the actual situation of snow removal corresponding to the above-mentioned road width, and the first objective is to provide a road surface leveling device for a snow removal truck that can perform roadside snow removal more safely, reliably, and efficiently. This is a technical issue.

The second technical object of the present invention is to provide a road surface leveling device for a snow removal truck that can easily transport the snow removal truck overland without the blades interfering with the traffic of other traffic vehicles even during forwarding. There is a particular thing.

[Means adopted to solve the problem]

The means adopted by the present inventor to solve the above problems will be explained below with reference to the accompanying drawings.

That is, the present invention provides a conventionally known snow removal truck which is equipped with a blade A on the lower surface of the center of the blade A that tilts forward and backward of the blade A in a one-sided flow state so as to be able to be pulled up in reverse. 8 is fixed, while the blade reversing frame 5 is connected to the slide rails 8, 8 so as to be slidable in the width direction, and the blade A and the blade reversing frame 5 are connected by a fluid pressure cylinder 11. By adopting a means that allows the blade A to slide in the width direction by moving the hydraulic cylinder 11 forward and backward, the first technical problem mentioned above has been successfully solved. A blade A that slides in the width direction by a retraction operation has a sub-blade 4 rotatably connected to one end of the main blade 3 via a hinge 13, and the main blade 3 and the sub-blade 4 are connected to each other by a hydraulic cylinder. 12, and by moving the hydraulic cylinder 12 forward and backward, the sub-blade 4 can be folded and stored inwardly behind the main blade 3. They succeeded in solving the technical problem.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a side view showing the working state of the road surface leveling device M according to this embodiment. In this embodiment, the blade A is inclined in a one-sided flow state in front and back of the snow removal truck 1 at the lower surface of the center of the chassis 2 of the snow removal truck 1. And this blade A is the chassis 2
The cutting edge is set on the road surface in a state exceeding the width of the cutting edge, and the main blade 3 is arranged on the left side in the direction of movement of the truck 1, and the sub blade 4 is arranged on the right side in the direction of movement of the truck 1. be.

FIG. 2 is a side view showing the folded state of the blade A when the snow removal truck 1 is being transported, and the main blade 3 is pulled up from the ground and
The sub-blade 4 is folded inwardly behind the main blade 3.

3 is a plan view showing the left or right sliding state of the blade A, FIG. 4 is a rear view of the blade A, and FIG. 5 is an enlarged cross-sectional view taken along the line -- in FIG. In FIG. 4, the reference numeral 5 denotes a blade reversing frame for reversing the blade A with respect to the road surface, which extends in the longitudinal direction of the main blade 3. An upper end bracket 24 is disposed on this frame 5, and the blade A is reversed by the forward and backward movement of a reversing fluid pressure cylinder 26 whose piston rod tip is pivotally connected to this bracket 24 by a pin 25 (first (see Figures 2 and 5). A pair of slider guides 6 protruding toward the blade A side are provided at both longitudinal ends of the frame 5.
6 is fixed. Both slider guides 6,
6 has a fitting recess on its inner side that fits into slide rails 8, 8, which will be described later, so that the weight of the blade A is supported by the sliding surface of the recess.

Furthermore, a trapezoidal traverse 7 protruding toward the blade reversing frame 5 side is fixed to the back surface of the blade A. This traverse 7 extends in the longitudinal direction of the blade A, and is separated at the boundary between the main blade 3 and the sub-blade 4. A pair of slide rails 8, 8 are fixed to the top surface of the traverse 7 at the top and bottom in the width direction. Both slide rails 8, 8 extend in the same direction as the traverse 7. The slide rails 8, 8 are slidably fitted into the slider guides 6, 6 fixed to the blade reversing frame 5.

The reference numeral 11 designates a hydraulic cylinder for sliding the blade A. The fluid pressure cylinder 11 has its piston rod pivoted at its tip end to a bracket 9 fixed to the trapezoidal traverse 7 on the back side of the blade A, and at its bottom to a bracket 10 fixed to the guide frame 5. Then, as the cylinder 11 expands and contracts, the blade A slides in its width direction. That is, by extending the piston rod of the cylinder 11, the blade A slides to the left side of the track 1, and by retracting the piston rod, the blade A slides to the right side of the track 1.

In this way, the device of this embodiment has the fluid pressure cylinder 1
1 can be used to slide the blade A, so the sliding amount of the blade can be arbitrarily controlled depending on snowfall and road conditions, making it possible to respond to various conditions (No. 1). (See Figures 3 and 4).

Next, the sub-blade 4 is folded using a hydraulic cylinder 12, a hinge 13, and a
This is done by the link 17 and the bell crank 15 (see FIGS. 6 and 7). That is, to explain the structure with reference to FIGS. 6 to 8, the sub-blade 4 is connected to the right end of the main blade 3 in the longitudinal direction by a hinge 13, and the sub-blade 4 is connected to the right end of the main blade 3 in the longitudinal direction via a link 17 pivotally connected to a bracket 16. It is pivotally connected to a point of action 18 of a bell crank 15 rotatably supported by the main blade 3. On the other hand, the bell crank 15
At the force point 19, the bracket 20 is oriented in the direction of the sub-blade 4 and the bottom side is attached to the main blade 3.
The tip of the piston rod 21 of the fluid pressure cylinder 12 which is swingably mounted is connected to the piston rod 21 via the piston rod.

Therefore, when the piston 21 of the folding hydraulic cylinder 12 is extended, the bell crank 15 rotates counterclockwise around the fulcrum 18a, and the rotational force acts on the sub-blade 4 via the link 17. In response to this, the sub-blade 4 turns in the same direction as the bell crank 15 and is folded at a substantially right angle to the rear inward side of the main blade 3 (see FIG. 8).

Conversely, when the extended piston rod 21 is retracted, the bell crank 15 rotates clockwise around the fulcrum 18a, so the rotational force is transferred to the link 1.
7 acts on the sub-blade 4, whereby the sub-blade 4 turns in the same direction as the bell crank 15 and is aligned in a continuous plane flush with the main blade 3. Since this state is firmly maintained unless the cylinder 12 is driven, normal snow removal work can be performed without the sub-blade 4 breaking unexpectedly during snow removal.

[Blade operation method of this embodiment device]

The folding operation of the sub-blade 4 of the device of this embodiment is reliably performed in the following order.

a When the piston rod of the hoist fluid pressure cylinder 22 hanging down from the chassis 2 is retracted, the blade A is lifted upward while being supported by the parallel link 23 and separated from the road surface (see Fig. 1).

b. Retract the piston rod of the side slide hydraulic cylinder 11 to slide the blade A to its full rightward limit (see Figures 3 and 4).

c. Extend the piston rod of the reversing fluid pressure cylinder 26 to reverse the blade A (fifth
(see figure).

d After confirming that the blade A surface faces the road surface and is in the forwarding state, the sub-blade 4 is folded by extending the piston rod of the folding hydraulic cylinder 12 (see FIG. 8).

Furthermore, when entering the snow removal work state, the folding is performed in the reverse order to the above-mentioned folding order.

a' Retract the piston rod of the folding hydraulic cylinder 12 to position the sub-blade 4 flush with the main blade 3 (see FIGS. 6 and 7).

b' Next, the piston rod of the reversing hydraulic cylinder 26 is retracted to direct the cutting edge of the blade A toward the road surface.

c' Next, the fluid pressure cylinder 1 for size slide
Extend piston rod 1 and slide blade A to the left in Figure 4.

d' Then, the piston rod of the hoist hydraulic cylinder 22 is extended to press the cutting edge of the blade A into contact with the road surface.

The device of this embodiment is generally constructed as described above, but the present invention is by no means limited to the above-mentioned embodiments, and various modifications and configuration additions may be made within the scope of the "Utility Model Registration Claims." For example, if it is possible, a sensor that detects the right limit of the slide excites the solenoid valve of the reversing fluid pressure cylinder 26 to drive the cylinder 26, and a sensor that detects the completion of reversing activates the folding fluid pressure cylinder 12. Of course, it is possible to perform sequence control in which the solenoid valve is excited to drive the cylinder 12, and the piston rod of the side slide fluid pressure cylinder 11 is completely retracted, that is, the blade A. The interlock circuit for failsafe is folded so that the hydraulic cylinder 12 cannot be driven unless it slides to the full right limit.
Of course, it also falls within the technical scope of the present invention to equip the machine to eliminate the burden on the operator.

[Effects of this invention]

As explained above using the embodiments, according to the road surface leveling device of the present invention, the blade is designed to slide in the width direction, so while the vehicle is running in the center of the road, only the blade is moved to the edge of the road. Therefore, it is possible to remove snow from the roadside safely, reliably, and efficiently.

In addition, in the road leveling device of the present invention equipped with a folding blade, the blade slides in its width direction, and the sub-blade can be folded inwardly behind the main blade, making snow removal unnecessary. When not in use, the snow removal truck can be easily transported by folding the sub-blade and forwarding the snow removal truck without the blades interfering with the traffic of other vehicles; conversely, when snow removal is required, the sub-blade can be By expanding the blade and sliding the blade in the width direction as appropriate, snow removal in the width direction of the road can be performed over a wide range, which is extremely practical.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the overall configuration of a snow removal truck equipped with a road surface leveling device according to the present embodiment in a blade working state, and FIG. 2 is a side view showing the overall configuration of a snow removal truck equipped with the same road surface leveling device in a blade forwarding state. Figure 3 is a side view showing the configuration, Figure 3 is a plan view showing the blade of the snow removal truck equipped with the road leveling device slid to the left or right, and Figure 4 is the back of the blade of the road leveling unit. Figure 5 is a cross-sectional view showing the configuration of the main parts of the road surface leveling device, and an enlarged cross-sectional view taken along the - line in Fig. 4, Figure 6 is a plan view showing the configuration of the main parts of the folding sub-blade, and Fig. 7 6 is a partially cutaway side view of FIG. 6, and FIG. 8 is a side view of the sub-blade in a folded state. M...road leveling device, A...blade, 1...
Snow removal truck, 2... Chassis, 3... Main blade, 4... Sub blade, 5... Blade reversal frame, 8... Slide rail, 11... Fluid pressure cylinder (for sliding), 12... Fluid pressure cylinder (For folding), 13... Hinge.

Claims (1)

[Scope of Claim for Utility Model Registration] In a snow removal truck equipped with a blade A that is tilted in a single-flow state in front and back of the chassis 2 on the lower surface of the center of the chassis 2 so as to be able to be reversed and pulled up, slide rails 8, 8 are provided on the back of the blade A. The blade reversing frame 5 is connected to the slide rails 8, 8 so as to be slidable in the width direction, and the blade A and the blade reversing frame 5 are connected by a fluid pressure cylinder 11. A road surface leveling device for a snow removal truck, characterized in that a blade A can be slid in its axial direction by advancing and retracting the blade A. A blade A that slides in the width direction by the forward and backward movement of the hydraulic cylinder 11 has a sub-blade 4 rotatably connected to one end of the main blade 3 via a hinge 13, and the main blade 3 and the sub-blade 4 are connected by a fluid pressure cylinder 12, and by moving the fluid pressure cylinder 12 forward and backward, the sub blade 4 can be folded and stored inwardly behind the main blade 3. road leveling device for snow removal trucks.