JPH11152721A - Leveling-down device of snow bank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leveling down device for a snow bank by which a snow bank can be efficiently cut down while avoiding a excessive load acting on a cutting plate during the leveling-down work of a snow bank and the demolished snow can be easily disposed.. SOLUTION: When a relatively low snow bank is leveled down, a cutting plate 21 is vertically moved independently or together with a derricking arm 13 by the extensive/contractive movement of one or both of a rotary cylinder 23 and a derricking cylinder 15, in the state that the leveling-down arm 25 is folded. When a high snow bank is leveled down, the rotary cylinder 23 is contracted and the cutting plate 21 is erected and the leveling-down arm 25 is vertically rotated together with the cutting blade 28 around the fitting axis 26 as the supporting point by the extending/contracting movement of the upper and lower cylinders to cut down the snow bank. The derricking arm 13 is fitted to a slewing base 10 slued by a slewing cylinder 12 through a pivoting axis 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow embankment cutting device for cutting snow embankments formed on both sides of a railway line or a road.

[0002]

2. Description of the Related Art In heavy snowfall areas, snow walls rise vertically high on both sides of railway tracks and general roads due to their snow removal. This snow embankment is unstable, and it is necessary to cut it off early because it is not clear when the snow or the snow melts into the track or road.

[0003] For this reason, conventionally, a snow crane has been cut by pulling a wire using a crane truck, or a worker with a lifeline has climbed and cut the snow embankment.

[0004]

The working efficiency is low both in the case of using a crane truck and in the case of a worker, and in the case of the latter, the working environment of the worker is very poor and a lot of manpower is required. And so on.

[0005] It is an object of the present invention to provide a snow embankment cutting device capable of efficiently cutting a snow embankment. It is another object of the present invention to provide a snow levee cutting device capable of avoiding an excessive load applied to a slicing plate during a snow levee cutting operation. Another object of the present invention is to provide a device for breaking down a snow levee that can easily handle snow that has fallen.

[0006]

In order to achieve at least one of the above-mentioned objects, the invention according to claim 1 is mounted on a traveling vehicle with a central axis, and is turned right and left about the central axis by a turning drive device. A turning table that is pivoted to the turning table, a turning arm attached to the turning table with a fulcrum shaft, and a turning arm that can be turned up and down around the fulcrum axis by a turning cylinder, and a pivot member attached to a tip member of the turning arm. A cutting plate which is mounted and rotated up and down around the pivot by a rotating cylinder; and a mounting shaft attached to a free end of the cutting plate with a mounting shaft. The structure comprises a cutting arm which is moved and a cutting blade attached to a free end of the cutting arm.

[0007] In the above means, when breaking down the snow embankment,
A break plate or a break arm is attached to the break position of the snowbank by operating a turning drive device, a raising / lowering cylinder, or an up / down cylinder, and an operation of a turning cylinder, an up / down cylinder, or the like of a traveling vehicle. It is performed by moving a cutting plate or a cutting blade during running. The cutting edge is mainly used for cutting a high portion of a snow embankment, and the cutting plate is mainly used for cutting a portion lower than the cutting edge. The above-described switching operation is usually performed by the operator in the driver's seat of the traveling vehicle.

[0008] In the above-mentioned snow levee breaking device, the tip member can be rotatably mounted on the raising / lowering arm to the left and right by a mounting pin, and can be fixed to the raising / lowering arm by a shear pin. With this configuration, when an excessive moment with the mounting pin as a fulcrum is applied to the cutting arm during the breaking operation, the shear pin is broken and the rotation of the breaking arm with the mounting pin as the fulcrum is free. . In addition, the breaking arm,
It is possible to adopt a configuration in which a plurality of vertical members are joined by a plurality of horizontal members. In this way, the strength of the breaking arm is enhanced, and the vertical members and the horizontal members penetrate deeply into the snowbank having a large area.

[0009] It is preferable that the cut-off plate is capable of turning left and right outside a plow provided at an end of the traveling vehicle. In this configuration, the snowbank breaks down in front of the plow, and the snow that has fallen falls in front of the plow. Further, it is preferable that a fixing lever for fixing the raising arm to a predetermined state by preventing the raising cylinder from contracting is provided on the raising arm (claim 5). In this case, when the apparatus is forwarded, the tilting arm is fixed to a predetermined state by the fixing lever without continuing the operation of the tilting cylinder.

[0010]

Embodiments of the present invention will be described with reference to the drawings. The attached drawings show an embodiment of a snow levee breaking device according to the present invention. In the figure, reference numeral 1 denotes a traveling vehicle.
The traveling vehicle 1 is a track snow plow having a self-propelled function,
At one end, a fixed plow 2 and a pair of movable plows 3
Rotary snow removal device 4 that blows snow taken into the other end by an auger or a rotating brush from a snow throwing cylinder with a blower 4
Respectively. Each movable plow 3 is attached to the left and right sides of the fixed plow 2 by a rotation shaft 5, and can be horizontally rotated by a plow cylinder 6.

Right behind the fixed plow 2, a swivel 10 is attached to the traveling vehicle 1 by a center shaft 11.
The swivel table 10 includes a pair of left and right swing cylinders 12, 12.
(FIGS. 2 and 3), it is possible to turn left and right around the central axis 11. The pair of turning cylinders 12 constitutes a turning drive device.

A swing arm 13 is attached to the swivel 10 with a fulcrum shaft 14 (FIG. 2). Raising arm 13
Can be turned up and down on a fulcrum shaft 14 by a tilting cylinder 15 provided between the turntable 10 and the tilting arm 13. A tip member 17 is attached to the free end of the raising / lowering arm 13 by a mounting pin 18 (FIGS. 2 and 6) so as to be rotatable left and right with respect to the horizontal raising / lowering arm 13. It is fixed to the raising / lowering arm 13 by the shear pins 19, 19. Sharpin 19
When an excessive moment about the mounting pin 18 is applied to the tip member 17, the tip member 17 breaks to allow free rotation of the tip member 17 about the mounting pin 18. 17 is provided.

Reference numeral 21 denotes a cutout plate formed of a metal material so as to be hollow. The cutting plate 21 is attached to the lower part of the tip member 17 in a horizontal state by a pivot 22, and is vertically moved about the pivot 22 by a rotating cylinder 23 provided between the tip member 17 and the cutting plate 21. Can be rotated. The cut-off plate 21 directly touches and cuts off snow, and is formed in a rectangular shape having a drum-shaped cross section as shown in FIG. 7 and a tapered tip 21a as shown in FIG. I have.

A breaking arm 25 is mounted on a free end of the horizontal breaking plate 21 with a mounting shaft 26. The cutting arm 25 includes a pair of left and right vertical members 25a, 25a.
a is integrally connected in a ladder shape with a plurality of cross members 25b, and the vertical members 25a, 25a are arranged in the same direction as the mounting shaft 26. With this structure, the strength of the breaking arm 25 is enhanced, and the biting of the breaking arm 25 into snow is improved, so that a large amount of snow can be accurately captured.

A link 25 is provided at the root end of the breaking arm 25.
c is rotatably mounted up and down, and between the link 25a and the breaking plate 21, the breaking arm 2
An up / down cylinder 27 for rotating the up / down 5 vertically is provided. The link 25c increases the turning angle of the breaking arm 25 by the vertical cylinder 27.
By the action of the link 25c, can be turned from a state of being folded substantially parallel to the break plate 21 to a state of extending in the longitudinal direction of the break plate 21.

The free end of the cutting arm 25 has a cutting blade 28
Are detachably attached with bolts protruding in a direction away from the cutting plate 21 parallel to the cutting arm 25.

Reference numeral 30 denotes a fixed lever. The fixing lever 30 fixes one end of the tilting arm 13 in a substantially horizontal state by preventing one end of the fixing lever 30 from contacting the end surface of the cylinder main body 15a of the tilting cylinder 15 so that the tilting cylinder 15 cannot be reduced. The small cylinder 31 is attached to the raising and lowering arm 13 so that the fixing cylinder 32 can be turned up and down around the small axis 31 as a fulcrum.

The raising / lowering arm 13 holds the plow 2 in a horizontal state.
3 has a length that protrudes largely outward. The tilting cylinder 15 is provided below the tilting arm 13 with the rotating cylinder 2.
Numerals 3 are provided on the raising / lowering arm 13 and the cutting plate 21 in a horizontal state, respectively, and the vertical cylinder 27 is inserted into the cutting plate 21. Note that all cylinders 6, 12,
15, 23, 27 and 32 are hydraulic cylinders.

Next, the operation of the above-constructed snow levee breaking device according to the present invention will be described. FIG. 1 shows a fixing cylinder 3
2 shows a state in which the fixing lever 30 is brought into contact with the cylinder body 15a of the cylinder for raising and lowering 13 to fix the raising and lowering arm 13 by reducing the size of the vehicle 2. Drive to the breakwater break site.

When the traveling vehicle 1 arrives at the work site, the tilting cylinder 15 is extended to elevate the tilting arm 13 appropriately, and one of the pair of turning cylinders 12 is extended while the other is extended. , The swivel 10 is swiveled about the central axis 11 so that the cut-off plate 21 and the cut-off arm 25 are directed to the portion of the snow bank to be cut off. At the appropriate time, the fixing cylinder 32 is extended to retract the fixing lever 30 from the fixing position.

When cutting down a relatively low snow embankment,
With the cutting arm 25 folded, the rotating cylinder 2
This is performed by vertically moving the collapsible plate 21 by the expansion and contraction operation of both or one of the cylinder 3 and the raising / lowering cylinder 15. At this time, since the distal end portion 21a of the cut-off plate 21 is tapered, it is easy to insert the cut-off plate 21 deep into the snow bank and cut it off.

In some cases, the turning cylinders 12, 1
2, the snow embankment can be cut by the lateral movement of the cut plate 21 due to the turning of the cut plate 21 due to the running of the traveling vehicle 1 to the right or left in FIG. At this time, the break plate 21
When an excessive moment acts on the cutting plate 21, each shear pin 19 is immediately broken, and the turning of the cutting plate 21 about the mounting pin 18 as a fulcrum is free.
And the deformation of the raising / lowering arm 13 is prevented. When the traveling vehicle 1 is moved rightward in FIG. 1, the snow that has fallen due to the breakout is pushed to the side of the track by the plows 2 and 3.

When a high snow embankment is to be cut, the turning cylinder 23 is contracted so that the cutting plate 21 is erected, and the cutting arm 25 is moved up and down together with the cutting blade 28 by the expansion and contraction operation of the vertical cylinder 27. To rotate. In this case, the cutting edge 28 is driven into the snow bank and the vertical member 2 of the cutting arm 25 is used.
Since the 5a and the cross member 25b bite into the snow embankment having a large area and firmly capture a large amount of snow, the snow embankment is accurately cut down. The collapsible arm 25 can be moved together with the collapsible plate 21 or, similarly to the collapsible plate 21,
5 or a rotating cylinder 23 or the like.

The traveling vehicle 1 shown in the figure is a track snow plow equipped with the plows 2 and 3 and the rotary snow plow 4, but even if the plows 2 and 3 and the rotary snow plow are not mounted. In addition, the vehicle can be used for general roads.

[0025]

As described above, the invention according to the first aspect of the present invention is directed to a swivel table which is attached to a traveling vehicle with a center axis and which can be turned left and right about the center axis by a turning drive device. A tilting arm that is attached to the base with a fulcrum shaft and that is vertically moved up and down with the fulcrum shaft as a fulcrum by a tilting cylinder, and is pivotally attached to a tip member of the tilting arm, and the pivoting shaft is rotated by a rotating cylinder. A cutting plate which is turned up and down on a fulcrum, a cutting arm which is attached to a free end of the cutting plate with a mounting shaft, and which is turned up and down about the mounting shaft by a vertical cylinder; Since it is configured to have a cutting edge attached to the free end of the breaking arm, the operator can move the cutting plate or the breaking arm to cut the snow bank quickly and neatly while staying in the driver's seat. Can

In the above-described apparatus for breaking down a snow levee, if the tip member is rotatably mounted on the raising / lowering arm to the left and right by a mounting pin, and is fixed to the raising / lowering arm by a shear pin, the cutting operation during the cutting-off work is performed. If an excessive moment with the mounting pin as a fulcrum is applied to the collapsing arm, the shear pin is immediately broken and the pivoting of the collapsing arm with the mounting pin as a fulcrum is free. This has the effect of preventing deformation and the like.

Further, when the cut-off arm has a structure in which a plurality of vertical members are joined by a plurality of cross members, the strength of the cut-off arm is enhanced, and the vertical and horizontal members have a wide area. As it digs deep into the water and firmly captures a large amount of snow, it can be cut smoothly and accurately.

When the cut-off plate is configured to be able to turn left and right outside the plow provided at the end of the traveling vehicle, the snow embankment is cut in front of the plow to advance the traveling vehicle. You can push it aside with a plow. When the lifting arm is provided with a fixed lever that prevents the lifting cylinder from shrinking and fixes the lifting arm in a predetermined state, the lifting arm can be easily operated with the fixed lever without using the lifting cylinder. And the traveling vehicle can be forwarded.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a snow levee breaking device according to the present invention.

FIG. 2 is a side view of a main part of the snow embankment cutting device of FIG. 1;

FIG. 3 is also a plan view.

FIG. 4 is a side view of a breaking plate and a breaking arm.

FIG. 5 is a plan view of the cutting board.

FIG. 6 is a partially broken plan view showing a mounting structure of a distal end member to a raising / lowering arm.

FIG. 7 is a sectional view of a portion (VII-VII) in FIG. 4;

FIG. 8 is a front view of the cutting edge.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 traveling vehicle 2 fixed plow 3 movable plow 10 turntable 11 center axis 12 turning cylinder (turning drive device) 13 tilting arm 14 fulcrum shaft 15 tilting cylinder 15 a cylinder body 17 tip member 18 mounting pin 19 shear pin 21 cut Collapsing plate 21a Tip portion 22 Axis 23 Rotating cylinder 25 Cutting arm 25a Vertical member 25b Horizontal member 26 Mounting shaft 27 Vertical cylinder 28 Cutting blade 30 Fixed lever

Claims (5)

[Claims] 1. A swivel table attached to a traveling vehicle with a center axis and turned left and right about the center axis by a turning drive device; and a swivel axis mounted to the swivel table with a fulcrum axis and a tilting cylinder. An inverting arm that can be moved up and down about a fulcrum shaft, a pivot plate that is attached to a distal end member of the upright arm by a pivot, and that can be pivoted up and down around the pivot by a pivoting cylinder; A cutting arm which is attached to a free end of the cutting plate with a mounting shaft, and which can be turned up and down about the mounting shaft by a vertical cylinder, and a cutting blade attached to a free end of the cutting arm; An apparatus for breaking down a snow embankment, comprising: 2. The snow embankment cutting device according to claim 1, wherein the tip member is rotatably mounted on the raising / lowering arm to the left and right with a mounting pin, and is fixed to the raising / lowering arm by a shear pin. . 3. The cutting arm according to claim 1, wherein a plurality of vertical members are connected by a plurality of horizontal members.
Or the snow embankment cutting device according to 2. 4. The snow embankment according to claim 1, wherein the cut-off plate is rotatable left and right outside a plow provided at an end of the traveling vehicle. Cutting device. 5. The tilting arm according to claim 1, further comprising a fixing lever for fixing the tilting arm in a predetermined state by preventing the tilting cylinder from shrinking. The snow levee breaking device described.