JPH0352249Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention A. Industrial field of use Attached to the back of the blade end of motor graders and truck graders to block snow at intersections, in front of people's houses, and other places where removed snow cannot be left behind. It is a device.

B. Prior art and its problems When snow removal is performed using the blades of conventional motor graders and track graders, the removed snow sticks out from the end of the blade and remains.

There were no particular problems in areas where there were no residential buildings, but there were problems such as residential buildings and intersections where the remaining snow had to be further removed.

B. Structure of the invention A. Means for solving the problem In order to achieve the above object, the invention is as follows.

That is, in the present application, the top horizontal surface 3A and the inclined surface 3B are shown on the back surface of the end of the blade 2 in a side view.
A hydraulic cylinder 4 that acts in the vertical direction is attached to the inclined surface 3B of the mounting bracket 3, and a bracket 5 is provided that projects upward from the horizontal surface 3A of the top of the mounting bracket 3.
, a hinge joint 6 having a horizontal part 6A and an upright part 6B connected to the rear end of the horizontal part has a substantially rectangular shape when viewed from the side. The hydraulic cylinder 4 is connected to the upright portion 6B of the hinge joint 6 via a horizontal shear pin 6D that is perpendicular to the direction of movement. The hardware 7B in the hinge arm 7, which is composed of a hardware 7B that holds the horizontal part 6A of the hinge joint 6 from above and below at the rear end, is connected to the horizontal part 6A of the hinge joint 6 by a vertical pin 7C, The hanging fixing plate 8 is formed into a substantially L-shaped plate on the side.
The upper portion 8A is connected to the front portion of the hinge arm 7, and the lower portion 8B is provided with a long hole guide 8B1 that gently curves forward.On the other hand, the free guide 8B1 is formed into a substantially elliptical plate that is long in the longitudinal direction of the side surface. The rear end portion of the plate 9 is the fixing plate 8.
The rear portion 8C of the blade shutter is connected by a horizontal fulcrum pin 9A perpendicular to the direction of movement, and the pin 9B protruding from the front portion is loosely fitted into the long hole guide 8B1 of the fixing plate 8. It is a device.

In this case, a liner plate 10 can be attached to the free plate 9.

(b) Examples of implementation of the idea Examples will be described with reference to the drawings.

1 is the blade shutter device of the present invention.

Reference numeral 2 designates a known blade, and a mounting bracket 3 having a top horizontal surface 3A and an inclined surface 3B formed in a substantially rectangular shape when viewed from the side is attached to the back end of this blade 2. A bracket 3C is provided to protrude rearward, and a hydraulic cylinder 4 that acts in the vertical direction is attached to the bracket 3C via a trunnion shaft 4A.

Reference numeral 5 denotes a bracket that protrudes upward from the top horizontal surface 3A of the mounting bracket 3, and the bracket 5 has a horizontal portion 6A and an upright portion 6B connected to the rear end of the horizontal portion, which has a substantially rectangular shape when viewed from the side. The hinge joint 6 is connected to the center of the hinge joint via a horizontal pin 6C that is perpendicular to the direction of movement so as to be able to rise and fall freely.

The hydraulic cylinder 4 is connected to the upright portion 6B of the hinge joint 6 via a horizontal shear pin 6D that is perpendicular to the direction of movement.

7 is a vertical plate 7A that is long in the front and back direction, and this vertical plate 7A.
This hinge arm is made up of a metal piece 7B that holds the horizontal part 6A of the hinge joint 6 from above and below at the rear end.The metal piece 7B and the horizontal part 6A of the hinge joint 6 are connected by a vertical pin 7C, A fixing plate 8 is hung from the portion.

Therefore, this fixing plate 8 is approximately L on the side.
The upper part 8A is connected to the front part of the hinge arm 7, and the lower part 8B has a long hole guide 8B1 that gently curves forward.

Reference numeral 9 denotes a free plate that is formed into a substantially elliptical plate that is long in the longitudinal direction of the side surface, and its rear end portion is connected to the rear portion 8C of the fixing plate 8 by a horizontal fulcrum pin 9A that is perpendicular to the direction of movement. A pin 9B protruding from the front portion is loosely fitted into a long hole guide 8B1 of the fixing plate 8.

As a result, it is attached so as to be able to swing vertically along the surface of the fixing plate using the elongated hole guide 8B1 provided in front of the fixing plate as a guide.

Reference numeral 10 denotes a liner plate attached to the fixing plate side of the free plate 9. This liner plate is made of plastic that has a low coefficient of friction and is difficult for snow to adhere to, and is fixed to the free plate 9 with screws. .

Reference numeral 11 denotes a stopper rubber protruding from a position near the top horizontal surface 3A of the mounting bracket 3 on the upper surface of the blade 2.

C action Explain along with the effects.

C. Effects of the invention Since the present invention is configured as described above, it produces the following effects.

This device operates using hydraulic pressure from the vehicle's working equipment, and is operated from the driver's seat using a lever or switch.

During normal blade snow removal, the hinge arm and fixing plate are stored above the blade.

When the valve is switched using a lever (or switch), the rod of the hydraulic cylinder 4 extends, and the hinge arm 7, which is connected by the hinge joint 6 and the hinge joint 6 and the vertical pin 7C, moves forward by about 1/4 using the horizontal pin 6C as a fulcrum. Rotate.

As a result, the fixing plate 8 and the free plate 9 fixed to the hinge arm 7 with bolts are lowered to the front of the blade to take the shutter working position.

The free plate 9 uses the fulcrum pin 9A as a fulcrum,
It is attached so as to be able to swing freely along the surface of the fixing plate 8 using the long hole guide 8B1 of the fixing plate 8 as a guide, and is capable of tilting the blade to handle blade work performed at various cutting angles. It is a safety mechanism that can follow ups and downs.

In addition, a liner plate 10 made of plastic with a low coefficient of friction and difficult for snow to adhere to is fixed to the free plate 9 with screws, so that snow does not get caught between the free plate 9 and the fixing plate 8, making it smooth. to sway.

If the road surface has undulations or obstacles that are greater than the range that can be handled by the movement of the free plate 9, and a load greater than the allowable load is applied, the shear pin 6D will be sheared at the rod end of the hydraulic cylinder, causing damage to the device and the blade body. There is a mechanism to prevent this.

When the shutter work is finished, use the lever (or switch)
When the valve is switched, the rod of the hydraulic cylinder 4 contracts, and the hinge joint 6 moves backward by about 1/2 inch.
After four rotations, the hinge arm 7, fixing plate 8, and free plate 9 rise to the top of the blade.

At this time, the hinge arm 7, fixing plate 8, and free plate 9 fall down onto the stopper rubber 11 by their own weight using the vertical pin 7C as a fulcrum, and are stored so as not to obstruct the driver's view.

As described above, the present invention can be said to be an extremely useful device that can be accurately adapted to areas where removed snow cannot be left behind and areas where removed snow may be left behind.

[Brief explanation of drawings]

Figure 1 is a side view, Figure 2 is a plan view of the main parts, and Figure 3 is a side view.
The figure is a rear view of the same as above, Fig. 4 is a side view of the hinge joint, Fig. 5 is a plan view of the same as above, Fig. 6 is a side view of the hinge arm, Fig. 7 is a side view of the fixing plate, and Fig. 8 is a side view of the hinge joint. Side view of free plate, No. 9
The figure is a plan view of the same as above. DESCRIPTION OF SYMBOLS 1...Blade shutter device, 2...Blade, 3...Mounting bracket, 4...Hydraulic cylinder, 5...
...Bracket, 6...Hinge joint, 7...
Hinge arm, 8... Fixture plate, 9...
...Free plate, 10...Liner plate,
11... stopper rubber, 12... bracket.

Claims (1)

[Claims for Utility Model Registration] (1) On the back of the end of the blade 2, there is a top horizontal surface 3A.
A mounting bracket 3 having a substantially square shape in side view is attached to the inclined surface 3B, and a hydraulic cylinder 4 that acts in the vertical direction is attached to the inclined surface 3B of the mounting bracket 3.
The bracket 5, which is attached and projects upward from the top horizontal surface 3A of the mounting bracket 3, has a horizontal portion 6A and an upright portion 6 connected to the rear end of the horizontal portion.
A hinge joint 6 having a substantially square shape when viewed from the side is connected to the center of the hinge joint so that it can rise and fall freely via a horizontal pin 6C that is orthogonal to the traveling direction, and a hydraulic cylinder 4 is connected to the upright portion 6B of the hinge joint 6. is connected via a horizontal shear pin 6D perpendicular to the traveling direction, and has a vertical plate 7A that is long in the front-rear direction, and this vertical plate 7.
The hardware 7B in the hinge arm 7, which is composed of a hardware 7B that holds the horizontal part 6A of the hinge joint 6 from above and below at the rear end of A, is connected to the horizontal part 6A of the hinge joint 6 by a vertical pin 7C. The fixing plate 8, which is attached to hang down from the section, is configured as a plate with a substantially L-shaped side surface, the upper section 8A is connected to the front section of the hinge arm 7, and the lower section 8B has a long hole guide that gently curves forward. 8B1 is opened, and on the other hand, the rear end portion of the free plate 9, which is formed into a substantially elliptical plate that is long in the longitudinal direction of the side surface, is the rear portion 8C of the fixing plate 8.
The pin 9B is connected to the long hole guide 8 of the fixing plate 8 by a horizontal fulcrum pin 9A that is perpendicular to the direction of movement.
A blade shutter device characterized in that it is loosely fitted in B1. (2) The blade shutter device according to claim 1, wherein a liner plate 10 is attached to the free plate 9.