JP2001254311A - Surface chipping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface chipping machine, in which a rotary edge for an operating section is brought to a rotary state or stopped temporarily and the status can be confirmed from a driver's seat for a backhoe (a hydraulic shovel), a manipulator or the like and which can further follow up to the corner angle section of a surface to be chipped such as a ceiling, a wall, a slope horizontal plane or the like even when the corner angle section is an included angle or a wide angle and can follow up to the surface to be chipped even when the surface to be chipped is interrupted by an overhang, from which low noises are generated and by which a fine finished surface is obtained. SOLUTION: The surface chipping machine for asphalt or the like is fixed at the front end section of a backhoe arm or the like and has the drum-shaped rotary edge with a bit, which is turned by an approximately horizontal shaft (inclinable) and can be offset, in a lower section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a surface grinder,
More specifically, the present invention relates to a low-noise surface scraper for scraping surfaces such as asphalt pavement, synthetic resin pavement, mortar walls, iced pavement, and freezer floor.

[0002]

2. Description of the Related Art Conventionally, local shaving work of asphalt pavement has been carried out by an operator directly gripping an asphalt pavement mainly using an air breaker or a hydraulic breaker. Because it is a mechanism that reciprocates a kind of chisel called a chisel made of hard metal using pneumatic or hydraulic pressure, the noise was intense and the physical fatigue of the workers was severe.

[0003] Therefore, a grinder using a vertical axis rotary type disk-shaped rotary blade or a fixed axis type drum-shaped rotary blade has been developed and put to practical use.

[0004] However, the former is extremely dangerous because the fragments fly in the horizontal tangential direction due to centrifugal force.
Although the latter has low noise, it has a problem that it is difficult to cut the surface of a narrow place or a place with an overhang, and that the generation of dust is not small.

Accordingly, the present inventor has made the rotating shaft of the drum-shaped rotary blade substantially horizontal, and offsets the outer drum-shaped rotary blade, in which each bit of the rotary blade is arranged in an inclined spiral arrangement, by biasing it in the axial direction. As a result, the inventors have found that the above problems can be solved at once, and as a result of various experimental studies, the present invention has been completed.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to enable a driver such as a backhoe (hydraulic shovel), a manipulator or the like to rotate or temporarily stop a rotating blade while sitting in a driver's seat to check a situation, It is an object of the present invention to provide a surface scraping machine capable of obtaining a low-noise and beautiful finished surface that can follow a corner of a work surface such as a wall, a slope, a horizontal surface or the like even if the corner is narrow or wide.

In addition, even when the edge of the work surface is covered by an overhanging obstacle and the surface grinder is difficult to approach the work surface in the conventional apparatus, it is offset from the central axis in the perpendicular direction. The surface cutting work can be performed by the rotating blade.

[0008]

A drum-shaped rotary blade having a number of bits fixed to the outer surface of a drum, a drive system for driving the drum-shaped rotary blade via at least two bearings, and a hydraulic system for driving the drum-shaped rotary blade A rotary cutter supporting portion provided with a motor, wherein the drum-shaped rotary blade has a bit fixed in a longitudinal direction of the drum spirally arranged along a rotation axis; For the tangential direction,
2. A drum-shaped rotary blade aligned at 30 to 60 degrees.
The surface scraping machine according to claim 2 (claim 2), and the surface scraping machine according to claims 1 and 2 (claim 3), which can be attached to the tip of the rotating arm of the backhoe, prevents scattering of generated fragments. The surface scraping machine according to any one of claims 1 to 3, further comprising a detachable watering device provided with a nozzle and a water tank, wherein the water tank is a water tank having an air hole with a float lid. The grinder according to any one of claims 1 to 5 (claim 5), and the cutter according to claim 1 to 5 provided with a pair of height-adjustable sledges for adjusting a shaving depth (claim 6). ), The target surface is asphalt pavement, synthetic resin pavement,
The surface scraping machine according to any one of claims 1 to 6, which is any one of a mortar wall, an ice-paved road, and a freezer floor.
A plurality of long holes are formed in the lower plate portion of the mounting bracket and / or the upper plate portion of the frame along the rotary blade axis direction, and the lower plate portion of the mounting bracket and the upper plate portion of the frame are bolted and / or fastened. Alternatively, the surface scraper (claim 8) according to any one of claims 1 to 7 is provided in which the stud and the nut and / or the bolt and the nut are fastened so as to be movable in the axial direction of the drum-shaped rotary blade. Is done.

Hereinafter, the present invention will be described in detail with reference to examples.

[0010]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a front view of a main part of the embodiment, FIG.
FIG. 4 is a side view showing the operation of the embodiment. FIG. 5 is a conceptual view of the water sprinkler, FIG. 6 is a side view showing the embodiment of the present invention mounted on a backhoe, and FIG. 7 shows a drum-shaped rotary blade pivot support frame mounting portion capable of adjusting the position in the rotation axis direction. FIG. 8 is a perspective view of an embodiment of the present invention, FIG. 8 is a sectional view of the mounting portion, and FIG. 9 is a plan view of the mounting portion.

1 to 9, reference numeral 1 denotes a backhoe arm tip, 2 denotes an upper mounting portion frame, 2A denotes pins, 3A and 3B.
Is a hydraulic motor, 4 is a pinion case, 5 is a hydraulic hose,
6 is a large-diameter gear case, 7 is a mounting bracket, 7A is a plate-shaped lower end portion of the mounting bracket, 8 is a frame, 8A is a plate-shaped upper end portion of the frame, 9 is a central axis, 10 is a body of a surface grinder (the present invention) Example), 11 is a bearing, 11A is a shaft, 12 is a double chain, 13 is a sprocket, 14 is a tensioner, 1
5 is a chain case, 19 is a drum, 19A is a drum surface, 20 is a drum-shaped rotary blade, 21 is a bit, R is a drum radius, S is a bit axis, T is a tangential direction (tangential direction), 22 is a bit support, 23 is a bit hard part, 28
Is a fender, 30 is a sled, 31 is a bolt, 32 is a nut, 33 is a cylindrical bracket, 34 is a mounting bolt, 35 is a long hole, 36 is a welded portion, 40 is a water tank, 41 is water 43 is a water inlet, 45 is an air port, 46 is a float lid, 48 is a valve, and 49 is a water pipe.

Next, as shown in FIGS. 1 and 2, the main body of the surface grinder is mounted on a pair of bearings 11, 11 fixed to an inverted U-shaped frame.
11 (a roller bearing with a taper), the drum-shaped rotary blade 20 pivotally mounted substantially horizontally (the angle can be freely changed), and a driving system thereof includes a horizontal shaft hydraulic motor 3A and a sprocket 13, as shown in FIG. 13, a double chain 12, and a tensioner 14. The double chain 12 and the like are covered with a chain cover 15 for safety and protection.

A large number of movable bits 21 are fixed to the surface of the rotary drum 20 in a spiral manner. Spiral arrangement of bits prevents a large number of bits from simultaneously contacting the target surface, such as a pavement surface, and the biting torque becomes too large, preventing the driving torque from becoming insufficient and the driving system from being destroyed, and providing a beautiful finish. To get the surface.

As shown in FIG. 3, the bit is movably fitted with a slight gap on a bit support base 22 fixed (welded) in a spiral shape to the drum surface 19A of the drum 19, and the length of the bit is extended. It is important that the directions are arranged substantially at an angle θ (30 ° to 60 °) with respect to the tangential direction of the drum.

If the angle θ is less than 30 °, the bit does not bite into the target surface well, the rotary blade 20 becomes difficult to rotate, and the bit tends to be unevenly worn. If the angle θ exceeds 60 °, the bit hits the target surface and the vibration and noise become intense. For that reason, the surface is not effectively removed and the rotating torque needs to be large. This is because the finished surface is not beautiful.

Therefore, 30 ° ≦ θ ≦ 60 °.

A high-speed steel or ceramic hard layer is applied to the tip of the movable play bit 21.
Since the bit does not easily wear and the bit itself slightly moves, the bit comes into contact with the target surface at an optimum angle, and the cutting is effectively performed. The drum peripheral speed was 60 to 200 m / min. The finished groove width (interval in the bit width direction) is preferably about 0.5 to 3.5 cm. The drum peripheral speed is 60 m / min. If it does not reach 200 m / min., The working speed is too slow and impractical. If it exceeds 60 m / min., Noise tends to increase slightly and biting tends to be insufficient. Is good. If the finished groove width is smaller than 0.5 cm, it will be difficult to obtain adhesion during the subsequent surface treatment, and if it exceeds 3.5 cm, it will be too coarse and it will be difficult to obtain smoothness of the re-paved layer.

The direction of rotation of the drum is, as shown in FIG.
p cut (in FIG. 4, the direction of the counterclockwise arrow W). Experience has shown that this is better. In other words, in the case of the reverse down cut, the vertical vibration becomes intense and the shaving cannot be performed well.

During the shaving operation, a large number of fine shavings 10 are generated, and their scattering is regulated by fenders 28, 28. In addition, by providing a water tank above the rear fender and spraying water, the scattering of the fragments can be more effectively suppressed. The water tank 40 is provided with an air hole with a float as shown in FIG. 5, and the air is intermittently introduced by utilizing the vertical movement of the float (arrow Z direction) caused by the vertical vibration of the cutter. A proper amount of water (approximately 0.5 / min.) Can be sprinkled without performing proper water sprinkling.

In FIG. 5, if the valve 48 is an electromagnetic valve, it is possible to remotely control watering from the cockpit of the backhoe 70.

In FIG. 6, reference numeral 100 denotes a floor or pavement surface (target surface), and reference numeral 70 denotes a backhoe.

In FIGS. 7, 8, and 9, in this embodiment, all the long holes 35 are provided in the lower end plate 7A of the mounting bracket along the axial direction of the drum-shaped rotary blade, and the bolts 34 are inserted through these long holes. By screwing into a bolt screw hole provided in the frame upper end plate portion 8A, the mounting bracket 7 and the frame 8 are tightened and fixed so that the position can be adjusted (offset) in the rotation axis direction of the drum-shaped rotary blade. However, the long hole 35 may be provided in the upper plate portion 8A of the frame in the opposite direction, and may be fixedly fastened by studs and nuts implanted downward from the lower plate portion 7A of the bracket. Does not change. Alternatively, long holes may be formed in both of the lower plate portions 8A of the bracket, and these may be connected with bolts and nuts.

[0023]

By implementing the present invention, all of the above objects are achieved. That is, the driver can check the situation by rotating or temporarily stopping the rotary blade while sitting in the driver's seat, and the corners of the ceiling, wall, slope, horizontal plane, etc. are narrow or wide. However, a low-noise surface slicing machine which can follow the above is provided.

In the apparatus of the present invention, a long slot is provided in the lower end plate 7A of the mounting bracket or the upper end plate 8A of the frame, and also in both sides, so as to extend along the rotation axis direction of the drum-shaped rotary blade. Since the rotary blades can be fixed to be offset from the center position in the perpendicular direction, even if the work surface is covered with obstacles that overhang upward, the work can be easily cut using the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a front view of a main part of the embodiment.

FIG. 3 is a side view of a main part of an enlarged example.

FIG. 4 is a side view showing the operation of the embodiment.

FIG. 5 is a conceptual diagram of a watering device.

FIG. 6 is a side view of the backhoe when the embodiment of the present invention is used.

FIG. 7 is a perspective view of a drum-shaped rotary blade pivot support frame mounting portion whose position can be adjusted in the axial direction of the drum-shaped rotary blade.

FIG. 8 is a sectional view of a mounting portion.

FIG. 9 is a plan view of a mounting portion.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Backhoe arm tip 2 Upper mounting section frame 2A pin 3A, 3B Hydraulic motor 4 Pinion case 5 Hydraulic hose 6 Large diameter gear case 7 Mounting bracket 7A Mounting bracket bottom plate section 8 Frame 8A Frame top plate section 9 Center shaft 10 Surface grinder body 11 Bearing 11A shaft 12 Double chain 13 Sprocket 14 Tensioner 15 Chain case 19 Drum 19A Drum surface 20 Drum-shaped rotary blade 21 bit R Drum radius S Bit axis T Tangential direction (tangential direction) 22 Bit support 23 Bit Hard part 28 Fender 30 Sled 31 Bolt 32 Nut 33 Cylindrical bracket 34 Mounting bolt 35 Long hole 36 Welding part 40 Water tank 41 Water 43 Water inlet 45 Air port 46 Float lid 48 Valve 49 Water piping

Claims (8)

[Claims] 1. A drum-shaped rotary blade having a number of bits fixed to the outer surface of a drum, a driving system and a hydraulic system for pivotally supporting the drum-shaped rotary blade via at least two bearings and further driving the drum-shaped rotary blade. A surface cutter having a rotary blade supporting portion having a motor. 2. A drum-shaped rotary blade in which the longitudinally fixed angle of each bit spirally arranged along the rotation axis is 30 ° to 60 ° with respect to the tangential direction of the drum. Item 4. A surface scraper according to Item 1. 3. The surface grinder according to claim 1, wherein the surface grinder can be attached to a tip of a rotary arm of the backhoe. 4. A surface scraping machine according to claim 1, further comprising a detachable watering device having a nozzle and a water tank for preventing scattering of generated debris. 5. The grinder according to claim 1, wherein the water tank is a water tank having an air hole with a float lid. 6. The grinder according to claim 1, further comprising a pair of height-adjustable sledges for adjusting a shaving depth. 7. The surface scraper according to claim 1, wherein the target surface is any one of an asphalt pavement, a synthetic resin pavement, a mortar wall, a frozen pavement, and a freezer floor. 8. A plurality of long holes are formed in the mounting bracket lower plate portion and / or the frame upper plate portion along the rotating blade axis direction, and the mounting bracket lower plate portion and the frame upper plate portion are formed. The surface scraper according to any one of claims 1 to 7, wherein the surface cutting machine is fastened with a bolt and / or a stud and a nut and / or a bolt and a nut so as to be movable and adjustable in the axial direction of the drum-shaped rotary blade.