FR2476710A1 - Cutter forming vertical edge on bitumen road surface - uses vibrating blade mounted on cantilever arm from compressor frame on skids - Google Patents

Abstract

The blade cuts vertical edge faces on a freshly laid bituminous highway carpet, operating continuously. It uses a vertical vibrating rectangular blade (4) driven by a compressor (1). The blade can be set at a fixed but adjustable height relative to the finished surface, mounted on an arm (11) cantilevering from the compressor. A self-propelled handling frame (5,6) is used to manipulate the compressor (1), which is mounted on skids (2,3), with compressed air supplied through flexible lines (7). The blade may be bolted in a forked end to the arm, or may be adjustable for inclination by wedges in an arm window.

Description

 Cutting asphalt, that is to say road surfacing, remains one of the long, tedious and costly operations that remains to be effectively resolved.

 Among the methods currently used, let us cite a few by way of example: the pneumatic or hydraulic hammer, operated in the direction from top to bottom.

 Currently, the most commonly used methods use the principle of trying to drive a spade into the ground along a vertical plane perpendicular to the road; this is the case with the pneumatic or hydraulic hammer that a man directs to manually obtain a vertical sinking of the spade.

This hammer can be larger and mounted under the arm of a shovel too. Or these hammers will be mounted alone or two by two on supporting frames, pushed manually or self-propelled to make the task less difficult for the operator. Whatever type of mounting is used, it almost always uses.

the same principle.

 Other methods use the concept of horizontally continuous work such as diamond saws. The work is very clean but too slow and too expensive Other attempts have been made, but using a kind of scarification tooth fixed on the bucket of the shovel.

The traction powers are then so enormous and the necessary grip on the ground so important that only large tracked machines are capable of handling such teeth.

 The present invention proposes to remedy all of these defects by creating a vibrating device fixed on a machine, which machine will drive a blade into the ground, will keep it there, while the vibrating device will act directly on a spade whose cutting edge will be maintained in a vertical plane or inclined plane, and pushed in the horizontal direction (and no longer vertical as in the prior art), either by the movement of the arm of the shovel for example, or by the translation of 19engin. A very comfortable continuous longitudinal cutting is thus obtained.

 Thus, FIG. 1 shows an assembly mounted under a shovel, the arm 5 and the link rod 6 of which can be seen resting on the cradle of a vibrator or a hydraulic hammer I, which cradle is in contact with the mix to be cut by pads 2 and 3. The hoses 7 supply hydraulic or pneumatic energy. The classic chisel will be replaced by a spade 4 with very wide edges, one of the edges of which will be permanently maintained at the level of insertion corresponding to the desired depth of cut.

 Figure 2 shows the detail of a spade. This spade may be a single piece, that is to say forged in one piece, but for reasons of wear and tear, the blade 8 may be detachable from the fixing rod 11. It can be mounted by bolts 12 holding the blade in a fork 9 of the fixing rod which will also include the flat portion (s) 10 of usual fasteners.

Figure 3 shows an advantageous execution of spade 11 whose side ll is shown partially sunk into the ground mounted at the end of a rod comprising by way of nonlimiting example 3 flats of fasteners 13, 14, 15
Figure 4 shows one of the positions, in particular perpendicular to the xy plane representing the ground level, which can be taken, thanks to the advantageous arrangement of three fixing flats.

Figure 5 shows oblique positioning to the right due to Figures 3 and 4
FIG. 6 shows an oblique positioning on the left according to the same principle of FIGS. 3 and 4.

 Figure 7 is an advantageous execution of the assembly of Figure 2 and shows a variant in which the variation of inclination of the blade can be obtained by the use of at least one corner, but preferably by 2 corners 16 and 17 can be used on either side of the blade 4 for the inclined plane but also on both sides for the vertical. At the end of this device can be forged a point or a spade, so that the operator can make horizontal cutting, and if it encounters hard spots, easily switch to the vertical position of the hammer.

Figure 8 shows the detail of the depth adjustment of the cutting blade 4. The first guide shoe (or wheel) 18 will preferably be mounted on a horizontal axis serving as a pivot. The second guide shoe 20 will be provided with appropriate height adjustment devices 21, so that the assembly, pivoting around the axis 19 will push the spade 4 more or less deeply into the ground
Figure 9 shows that if the position of the arm and the link is judiciously chosen, the shovel can raise the hammer and work temporarily in the conventional vertical driving direction.

 Figure 10 shows another embodiment in which the guide shoe 18 of Figure 8 is deleted, only the shoe 20 being used, without the need for height adjustment elsewhere. In this case the chisel 32 is fixed on a kind of cradle 23 itself provided with shoes 26 which can receive at an appropriate angle the blade 24 itself positioned in height by holes 25 and corresponding axis. The tip of the chisel can protrude for use horizontally with a cutter and vertically with a punch.

 Figure 1 1 shows a mounting method in which the arm of the shovel is not mounted directly on the cutter, but where this arm is still provided with its bucket which can be avoided to remove, and under which will fix the cutter.

 Use will advantageously be made of 2 hooks 27 fixed on the cutter and in which the cutting edge 29 of the bucket 30 will come, on which at least one hook 31 will be fixed, on which a tensioner 28 will be fixed, firmly connecting the cutter to the bucket.

 It can be performed as shown in Figure 12, an assembly with a vibrator or hammer 1, a spade 4, in a vertical or oblique position, these two bodies resting on a cradle. The spade 4 will be held by a holding block 33 on which the hammer will strike.

This block will be connected to the vibrating member assembly by two dampers 34 and 35 mounted opposite. A guide device, of which for example a part 36 is secured to the hammer and a portion 37 is secured to the retaining bar of one of the shock absorbers, will ensure good overall rigidity.

Claims (12)

 1 - Continuous mix cutter characterized in that a shock generator is fixed on a carrier and maintained by the pressure thereof which generator will include guide means on the ground, and a cutting blade similar to a spade maintained horizontally, the leading edge of which will be substantially perpendicular to the plane of the road to be cut, and maintained at a chosen depth of cut., preferably in an orientable manner, the movement of the assembly being carried out either by push or by traction of the carrier (among other hydraulic excavator).  2 - Continuous mix cutter according to claim 1 charac terized in that the shock generator works either in hydraulic energy or in pneumatic energy.  3 - Continuous mix cutter according to claims 1 and 2 characterized in that the shock generator is in contact with the ground by means of pads.  4 - Continuous mix cutter according to claims 1 to 3 characterized in that the conventional chisel will be replaced by a spade with a very wide edge.  5 - Continuous mix cutter according to claims 1 to 4 characterized in that the spade can be in one piece or the detachable blade of the fixing rod.  6 - Continuous mix cutter according to claims 1 to 5 characterized in that 2 or 3 fixing flats on the rod will ensure due to their advantageous arrangement, the various positions of the blade.  7 - Continuous mix cutter according to claims 1 to 6 characterized in that a variant of the blade tilt angle can be achieved by means of 2 corners placed on either side of the blade, or on either side of the blade to obtain the latter vertical.  8 - Continuous mix cutter according to claims 1 to 7 characterized in that the assembly will be adjustable and can pivot around an axis to thereby obtain the driving depth.  9 - Continuous mix cutter according to claims 1 to 8 characterized in that the cutter + shock generator assembly may possibly work in the vertical direction.  10 - Continuous mix cutter according to claims 1 to 9 characterized in that one can eliminate the pivot and the height adjustment, in favor of a depth adjustment of the plate itself, the latter resting on a cradle provided skates.  CLAIMS - CONTINUED  11 - Continuous mix cutter according to claims 1 to 10 characterized in that the cutter + shock generator assembly can be fixed under the bucket of the shovel by means of 2 hooks arranged judiciously.  12 - Continuous mix cutter according to claims 1 to 11 characterized in that the cutting of the asphalt will be achieved by a spade on which will hit a pneumatic hammer.