JPH05346006A - Blade cutting edge exchanger for road surface correcting device - Google Patents

Abstract

PURPOSE:To exchange a cutting edge as appropriate by separating a cutting edge rotor from a blade back face with a hydraulic cylinder, and rotating it by the preset angle via a link mechanism. CONSTITUTION:A cutting edge rotor 12 arranged with three cutting edges 12a-12c is pressed to the lower section of the back face of a blade 13 with a hydraulic cylinder 2 via a plate 11. When the hydraulic cylinder 2 is shrunk, the plate 11 is rotated in the left direction centering on a pin 21, and the cutting edge rotor 12 is separated backward from the lower section of the back face of the blade 13. A link 9 is moved downward via a link 10 and an L-shaped link 6, its tip pushes a cutting edge 12b downward, and the cutting edge rotor 12 is rotated by about 120 deg. centering on a rotary shaft 22. When the hydraulic cylinder 2 is extended, the cutting edge 12b is pressed to the lower section of the back face of the blade 13. The cutting edges 12a-12c are changed in sequence by one extending/shrinking action of the hydraulic cylinder 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a cutting edge replacement mechanism mounted on a blade of a road leveling device.

[0002]

2. Description of the Related Art A conventional road leveling device is constructed so that only one set of cutting edges can be mounted on one blade.

[0003]

The problems described in the prior art have the following problems. When the cutting edge was selected according to the purpose of the road surface adjustment work or the cutting edge was worn, the replacement work had to be performed manually at the work site.

As a result, the work efficiency is lowered and the safety of replacement workers is impaired. The present application has been made in view of such problems of the conventional technology, and an object of the present application is to provide the following things. The cutting edge rotating body, which has three sets of cutting edges arranged under the blade rear surface, is crimped by a hydraulic cylinder, etc., and the cutting edge rotating body is separated from the blade depending on the purpose of road surface adjustment work and the wear condition of the cutting edge used. After rotating, the blade is pressed against the lower part of the back surface of the blade to replace the cutting edge. With this, if you always have 3 sets of cutting edges in a safe place such as a storage place, you can replace up to 3 sets by only operating from the cab, so there is almost no need to replace them at the work site, and cutting It is possible to improve safety and work efficiency during edge replacement work.

[0005]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems by using the following structure. That is, according to the present invention, three sets of cutting edges 12a are formed by the expansion / contraction operation of the hydraulic cylinder 2 or the like arranged on the back surface of the blade 13 of the road surface leveling device.
At the same time when the cutting edge rotating body 12 having the blades 12b and 12c disposed therein and crimped to the lower part of the rear surface of the blade 13 is detached from the blade 13, the hydraulic cylinder 2
After rotating the cutting edge rotating body 12 by a link mechanism or the like interlocking with the expansion / contraction operation of the blade 13, the blade 13 is expanded / contracted by the expansion / contraction operation of the hydraulic cylinder 2 or the like.
Is a cutting edge exchanging device for blades of a road surface leveling device, which is configured so that the cutting edge can be exchanged by being crimped to the lower part of the back surface of the.

[0006]

EXAMPLES Examples will be described with reference to the drawings. 1
Is a cutting edge exchanging device for blade of the road leveling device of the present invention. A hydraulic cylinder 2 is rotatably attached by pins 23 to support frames 3 fixed to both ends of the back surface of a blade 13 of the road surface leveling device. On the support frame 3, a front upper end of a plate 11 formed into a substantially inverted triangular side surface is pivotally attached by a pin 21. And this plate 11
A hydraulic cylinder 2 is pivotally attached by a pin 14 to the upper rear end of the. At the lower end of the plate 11, a cutting edge rotating body 12 having three sets of cutting edges 12a, 12b, 12c arranged on a rotating shaft 22 is rotatably supported in parallel with the blade 13 via the rotating shaft 22. There is. On the other hand, a link 10 having the same pivot point as the plate 11 is connected to the hydraulic cylinder 2.
The L-shaped link 6 pivotally connected by a pin 16 and a pin 15 are pivotally connected by a pin 16 to a bracket 4 fixed to the rear surface of the unit 3.
Further, the other end of the L-shaped link 6 is pivotally connected to a link 9 having a vertically elongated hole by a pin 18. The link 9 is formed along the pin 8 at the pivot connection point of the link 8 pivotally attached to the bracket 5 fixed to the back surface of the blade 13 by the pin 20 and the link 7 pivotally attached to the L-shaped link 6 by the pin 17. It is designed to move up and down. It should be noted that each of the above pins is in a direction orthogonal to the traveling direction. Further, in the drawing, 24 is a blade lifting cylinder. Reference numeral 25 is a mounting frame. 26 is a parallel link.

The present invention operates as follows. Cutting edges 12a, 12 through the plate 11
Cutting edge rotating body 12 in which b and 12c are arranged
By the contraction operation of the hydraulic cylinder 2 that is crimped to the lower back surface of the blade 13, the plate 11 rotates leftward about the pin 21 so that the cutting edge rotating body 12 moves backward from the lower back surface of the blade 13. break away. At the same time, the link 9 pivotally connected to the L-shaped link 6 is connected to the pin 19 by pivoting to the right around the pin 16 of the L-shaped link 6 which is interlocked with the forward movement of the link 10. Along the downward direction, the tip of the link 9 pushes the cutting edge 12b downward, and the cutting edge rotating body 12 moves about 120 degrees around the rotation axis 22.
Rotate once. After that, when the hydraulic cylinder 2 is extended,
The cutting edge 12b is crimped to the lower rear part of the blade 13. As described above, the cutting edge is sequentially replaced by one expansion / contraction operation of the hydraulic cylinder 2.

[0008]

Since the present invention is constructed as described above, it has the following effects. 1. Since various types of cutting edges can be arranged and exchanged, it is possible to select a cutting edge that suits the road surface condition and perform fine road surface adjustment work. 2. Since there is almost no long-term work interruption for exchanging the cutting edge, efficient road leveling work can be performed, and the safety at the time of exchanging the cutting edge can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a hydraulic cylinder is extended.

FIG. 2 is a rear view of FIG.

FIG. 3 is a side view of the hydraulic cylinder in a contracted state.

FIG. 4 is a rear view of FIG.

FIG. 5 is an overall plan view.

FIG. 6 is a side view of the above.

[Explanation of symbols]

1 Cutting edge exchange device for blade of road surface leveling device 2 Hydraulic cylinder 3 Support frame 4 Bracket 5 Bracket 6 L-shaped link 7 link 8 link 9 link 10 link 11 Plate 12 Cutting edge Rotating body 12a Cutting edge 12b Cutting edge 12c Cutting edge 13 blade 14 pin 15 pin 16 pin 17 pin 18 pin 19 pin 20 pin 21 pin 22 rotating shaft 23 pin

Claims (1)

[Claims] 1. Three sets of cutting edges (12a, 12b, 12) by expansion and contraction of a hydraulic cylinder (2) arranged on the back surface of a blade (13) of a road leveling device.
The cutting edge rotating body (12), in which c) is arranged and is crimped to the lower rear surface of the blade (13), is detached from the blade (13), and at the same time, it is interlocked with the expansion and contraction operation of the hydraulic cylinder (2). After rotating the cutting edge rotating body (12) with a link mechanism or the like, the cutting edge can be exchanged by pressing the lower part of the back surface of the blade (13) by expanding and contracting the hydraulic cylinder (2). A cutting edge exchanging device for a blade of a road leveling device, which is characterized in that