JP4077776B2 - Shutter device for snow removal - Google Patents

Description

  The present invention relates to either a blade reversing operation by changing the cutting angle of the cutting edge or a momentary blade reversing operation by an operation of a safety device in a shutter attached to a blade disposed in a snow removal vehicle. However, the shutter is not affected at all by the reversing operation of the blade, and the shutter can always be opened and closed independently, and it relates to a device that can arbitrarily block and open snow removal during snow removal work. is there.

  Conventionally, this type is as follows.

  The support portion of the conventional shutter device is attached to the blade, and the shutter follows as it is during the reversal operation by changing the cutting angle of the blade.

  In other words, since the support part of the shutter device moves together with the blade, the shutter follows the blade reversing operation as it is in either the blade reversing operation by changing the cutting angle of the cutting edge or the instantaneous blade reversing operation by the operation of the safety device. It was something to do.

  When the shutter is closed at the time of snow removal work, when the blade is tilted forward, the shutter comes into contact with the road surface, so that there is a problem that the shutter must be anticipated to move in the direction opposite to the road surface.

  In the prior art document, it is as follows.

1. In the case of Japanese Utility Model Laid-Open No. 6-8421, the shutter support portion is fixed to the blade rear surface portion, and follows the same when the blade is reversed. Further, the left and right movement of the shutter is for changing the working posture and the storage posture. (Patent Document 1)
2. In the case of Japanese Utility Model Laid-Open No. 60-91611, the shutter housing is mounted at the lateral end portion of the snow plow, and follows as it is when the snow plow is reversed. Further, the left and right movements of the shutter rotate in an arc shape around the pivot point. (Patent Document 2)
3. In the case of Japanese Utility Model Laid-Open No. 56-176220, the shutter-type frame is mounted on the end portion of the snow plow and follows as it is when the snow plow is reversed. Further, the left / right moving mechanism of the shutter is not mounted. (Patent Document 3)
Japanese Utility Model Publication No. 6-8421 Japanese Utility Model Publication No. 60-91611 Japanese Utility Model Publication No. 56-176220

  The support portion of the conventional shutter device is attached to the blade, and the shutter follows as it is when the blade is turned in reverse by changing the cutting angle of the blade. Therefore, when the shutter is closed during the snow removal operation, the shutter moves when the blade is tilted forward. Therefore, the shutter must be expected to move in the direction opposite to the road surface in advance.

  In recent years, in order to prevent damage to the device due to contact between the cutting edge of the blade and an obstacle on the road surface, the installation of a safety device has been standardized, and the operation of the safety device is an obstacle hidden in the snow on the road. It is difficult to avoid in advance, and when the safety device operates when it comes into contact with an obstacle, the blade instantaneously reverses forward, so that the shutter located on the road surface makes strong contact with the road surface and damages the shutter and the device. Will do.

  Therefore, it is difficult to move the shutter in the direction opposite to the road surface in advance because the capability of the shutter is reduced.

  The present invention is as follows.

In the invention according to claim 1, the blade B disposed in the snow removal vehicle A blocks the snow removal by the operation of the shutter 1 in the place where the snow cannot be removed such as in an intersection or in front of a house during snow removal work, and after passing In a snow removal shutter device configured to resume snow removal,
  The first bearing 2 and the second bearing 3 are respectively disposed on the rear end of the blade B and the blade base 11 to which the rear surface of the blade B is attached so that the inversion center of the blade B and the bearing center coincide with each other.
  Corresponding to the expansion and contraction of the blade B, the inner rod 4 is slidable with respect to the outer rod 5 and is connected to transmit the rotational force to each other. The inner rod 4 and the outer rod 5 are connected to the first bearing 2. And the second bearing 3 are pivotally supported respectively,
  A rod portion of a shutter opening / closing cylinder 9 is rotatably connected to an outer bracket 6 connected to the outer rod 5, and a trunnion portion of the shutter opening / closing cylinder 9 is rotatably connected to a cylinder bracket 8. The shutter 1 is fixed to the end of the inner rod 4,
  The shutter 1 is opened and closed by applying a rotational force to the inner rod 4 via the outer rod 5 by the expansion and contraction operation of the shutter opening and closing cylinder 9.
  Either the change of the cutting angle of the cutting edge 10 provided on the blade B by the expansion / contraction operation of the blade reversing cylinder 13 or the reversing operation of the blade B by the operation of the safety device by the contact between the obstacle on the road and the cutting edge 10 The shutter 1 for snow removal is also characterized in that the shutter 1 is configured to be held at a fixed position without following these fluctuations.

According to a second aspect of the present invention, the inner rod 4 and the outer rod 5 are formed of a square steel pipe as a rotational force transmitting means for connecting the inner rod 4 and the outer rod 5 so as to be able to transmit rotational force to each other. The snow removal shutter device according to claim 1 is provided.

1. During snow removal work, even if the cutting angle of the cutting edge is adjusted or the cutting edge is in contact with an obstacle and the reversing operation is performed by retraction, the shutter remains as it is, with the shutter closed and snow removal blocked. Therefore, there is no problem such as damage to the shutter device.
2. The shutter can be opened and closed at any position following the expansion and contraction of the blade.

  Hereinafter, embodiments of the present invention will be described based on examples with reference to the drawings.

  A plurality of bearings are arranged on the rear end of the blade and the blade base, the inner rod and the outer rod are connected by the rotational force transmitting means, and the expansion / contraction operation is slidable. A shutter opening / closing cylinder is connected to the outer bracket 6, and a trunnion portion of the shutter opening / closing cylinder is rotatably connected to the cylinder bracket 8 to open / close a shutter fixed to the end of the inner rod. It is configured so that it can be opened and closed independently and does not follow the reversing operation of the blade.

FIG. 1 shows that the cutting edge 10 comes into contact with an obstacle in the working state of FIG. 2 and the blade B is reversely operated by the operation of the safety device. However, the shutter 1 does not follow and maintains the snow removal blocking posture. .

  Further, even when the blade B is reversed by changing the cutting angle of the cutting edge 10 by the expansion and contraction operation of the blade reversing cylinder 13, the shutter 1 is not in contact with the road surface and there is no fear of damage.

  FIG. 2 is a posture at the time of work, and the shutter 1 is in a closed state to block snow removal.

  Further, the shutter 1 is located slightly away from the road surface. This is because the amount of wear of the cutting edge 10 is anticipated in advance, and if it is such a clearance, the snow is compressed and hardened, so that the snow is cut off. There is nothing wrong with doing.

  FIG. 3 shows a state in which snow can be removed from the blade B as usual with the shutter 1 opened by the shortening operation of the shutter opening / closing cylinder 9 which is the posture at the time of work in FIG.

  FIG. 4 is an enlarged rear view of the main part of the working posture of FIG. 2. Inside the two sets of bearings 3, 3 fixed to the blade base 11 with bolts, an outer rod 5 is provided with an appropriate lock nut 7. An inner rod 4 is rotatably connected to the inside of the bearing 2 that is rotatably connected by mounting and fixed to the rear end portion of the blade B, and is appropriately connected to the outer periphery of the outer periphery of the outer periphery. The inner rod 4 is slidably connected to the inside of the rod 5, and the shutter 1 is opened and closed by applying a rotational force to the inner rod 4 via the outer rod 5 by the expansion and contraction operation of the shutter opening / closing cylinder 9. In this figure, the shutter 1 is closed.

  FIG. 5 is an enlarged side view of the main part of the CC section of FIG. 4 in the working posture of FIG. 2, and the outer rod 5 is connected to the inside of the bearing 3 fixed to the blade base 11 by bolts. The inner rod 4 is slidably connected to the inside of the outer rod 5, and the outer rod 5 and the inner rod 4 are shown as a square steel pipe as a rotational force transmitting means. A rotational force transmission means using an attached shaft may be used.

  FIG. 6 is a plan view of the entire snow removal vehicle in the working posture of FIG. 2, and the blade B extends to the left by the extension of the blade telescopic cylinder 12 with the shutter 1 closed and the snow removal blocked. Therefore, the working posture is such that the inner rod 4 also slides and extends.

It is the side view which contacted the obstacle in the state where the shutter was closed, and the blade retracted and reversed. It is a side view which has closed the shutter. It is a side view which has opened the shutter. It is a principal part enlarged rear view which shortened the braid | blade and closed the shutter. FIG. 5 is an enlarged cross-sectional view taken along the line CC in FIG. 4. It is a top view of the operation | work which is extending | stretching a braid | blade and closing a shutter.

Explanation of symbols

A Snow removal vehicle
B blade
1 Shutter
2, 3 bearing
4 Inner rod
5 Outer rod
6 Outer bracket
7 Lock nut
8 Cylinder bracket
9 Shutter opening / closing cylinder
10 Cutting edge
11 Blade base
12 Blade telescopic cylinder
13 Blade reversing cylinder

Claims (2)

Where snow removal vehicles blades are arranged in (A) (B) is unable snow like before crossing the or houses during snow removing, by operation of the shutter (1) to cut off the snow removal, snow removal after passing In the snow removal shutter device configured to resume the operation,
The first bearing (2) and the second bearing (2) are arranged so that the reverse center of the blade (B) and the bearing center coincide with the back end of the blade (B) and the blade base (11) to which the back of the blade (B) is attached . a bearing (3) respectively disposed,
In correspondence with the expansion and contraction of the blade (B), slidable relative to the inner rod (4) outer rod (5), and, while continuously provided rotatably force transmitted to each other, the inner rod (4) Outer rod (5) and each rotatably is axially supported on the first bearing (2) and a second bearing (3),
The outer bracket (6) connected to the outer rod (5) is rotatably connected to the rod portion of the shutter opening / closing cylinder (9), and the trunnion portion of the shutter opening / closing cylinder (9) is connected to the cylinder bracket (8). ), And a shutter (1) is fixed to the end of the inner rod (4).
The shutter (1) is opened and closed by applying a rotational force to the inner rod (4) via the outer rod (5) by the expansion and contraction operation of the shutter opening and closing cylinder (9),
By the operation of the more safety devices due to the expansion and contraction operation of the blade reversing cylinder (13) in contact with the blade changes the cutting angle of the cutting provided in (B) the edge (10), or obstacle and the cutting edge of the road (10) In any case of the reversal operation of the blade (B) , the shutter (1) is configured so as to be held at a fixed position without following the fluctuation thereof, . The inner rod (4) and the outer rod (5) are formed of a square steel pipe as a rotational force transmission means for connecting the inner rod (4) and the outer rod (5) so as to be able to transmit rotational force to each other. The snow removal shutter device according to claim 1, wherein:

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