Dust collection cover body for drum cutter

Abstract

To provide a dust collection cover body for a drum cutter capable of easily and efficiently preventing dust and the like generated when cutting hard objects using the drum cutter from scattering.SOLUTION: A dust collection cover body 10 connected to a rotational cutting drum 21 of a drum cutter 20 attached on a tip part of an arm part of a heavy machine for a backhoe to cover it so as to allow dust and the like to be sucked and collected upon cutting comprises: a support rod part 15 and a cover body 11. The cover body 11 has a hollow semicircular box type shape with an upper surface cover part 12 having a shape bent in a semicircular shape and a side surface cover part 13 arranged along a side surface part of an external side of the rotational cutting drum 21. A sucking connection mouth 14 is arranged so as to project outward from the upper surface cover part 12.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a dust collection cover for a drum cutter, and in particular to a dust collection cover for a drum cutter that is joined to cover a pair of rotating cutting drums that constitute a drum cutter that is attached in place of a bucket as an attachment to the tip of the arm of a backhoe heavy equipment, and that can suck in and collect dust particles that occur during cutting. [Background technology]

[0002] A drum cutter is a known cutting device that has, for example, a flat, disk-shaped cutter drum with numerous cutting picks with embedded carbide tips protruding from the outer periphery.It is possible to crush and cut hard objects such as concrete and bedrock while rotating the cutter drum, and therefore is used as a device that enables concrete cutting, for example, in underground continuous wall construction methods, by being attached to a trench-forming excavating machine that cuts concrete at the joint between the leading and trailing elements (see, for example, Patent Document 1 and Patent Document 2).

[0003] Furthermore, since drum cutters are capable of cutting hard objects such as concrete and bedrock, technology has been developed to attach the drum cutter to the tip of the arm of a backhoe heavy machine, preferably instead of a bucket which is attached as an attachment to the tip of the arm (see, for example, Patent Document 3), which makes it possible to use the drum cutter as a device for cutting, for example, concrete structures and paved surfaces, and performing surface treatments, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP Patent Publication No. Hei 6-220840 [Patent Document 2] JP Patent Publication No. Hei 10-140601 [Patent Document 3] Public Relations, Patent Publication No. 61-225494 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, when a drum cutter is attached as an attachment to the tip of the arm of a backhoe heavy equipment to cut concrete structures, pavement surfaces, etc., a large amount of dust particles, such as flying stones, are generated, and measures to prevent this dust particles from scattering into the surrounding area are necessary. While measures such as sprinkling water or providing a dustproof net are conceivable, sprinkling water requires cost and effort to secure water and install a water supply system, and providing a dustproof net requires the net to be moved each time cutting progresses. For these reasons, there is a need for a technology that can more simply and efficiently prevent the scattering of dust particles, such as flying stones, generated when cutting hard objects with a drum cutter attached to the tip of the arm of a backhoe heavy equipment, and preferably collect this dust particles.

[0006] The present invention aims to provide a dust collection cover for a drum cutter that can easily and efficiently prevent dust particles generated when cutting a hard object with a drum cutter attached to the tip of the arm of a backhoe heavy equipment from scattering around, and that can also collect such dust particles. [Means for solving the problem]

[0007] The present invention provides a dust collection cover body for a drum cutter that is joined to cover a pair of rotating cutting drums that constitute a drum cutter that is attached in place of a bucket as an attachment to the tip of the arm of a heavy machine for backhoes, and that is capable of sucking in and collecting dust that occurs during cutting. The drum cutter is rotatably connected and supported to the tip of the arm of the heavy machine for backhoes, and is configured to include an attachment base part having a rotary drive shaft rotatably attached to a bearing part at the tip side, and a pair of rotating cutting drums with a plurality of cutting pigs protruding from their outer peripheries, each of which is fixed integrally to the rotary drive shaft at a part that protrudes on both sides from the bearing part of the attachment base. The dust collection cover body for a drum cutter is configured to include a pair of support rod parts that are fixed to a part of the attachment base part above the rotating cutting drums, and a pair of cover bodies that are supported by the support rod parts and arranged to cover at least the upper half of each of the rotating cutting drums. The pair of support rods are arranged parallel to the rotary drive shafts and are attached to the front and rear sides of the attachment base part, respectively. Both have male thread bolt members fixed to the end surface portions on both sides in a protruding state, and each of the cover bodies has a hollow semicircular box shape having an upper cover portion having a semicircular curved shape concentric with the rotary drive shaft and arranged along the upper outer periphery of the pair of cutting rotary drums and spaced apart from each other, and side cover portions whose peripheral edges are joined to the upper cover portion and arranged along the outer side surfaces of the pair of cutting rotary drums and spaced apart from each other, and a suction connection port is provided protruding outward from the upper cover portion. Each of the cover bodies is integrally attached with a curved band-shaped cover body joining plate portion that extends along the outer peripheral edge of the side cover portion arranged along the outer side surface portion and protrudes radially outward, and the cover body joining plate portion is formed with a curved fastening guide elongated hole that curves in an arc concentric with the rotation drive shaft along the curved shape of the top cover portion, and the curved fastening guide elongated hole of the cover body joining plate portion is inserted into the curved fastening guide elongated hole of the pair of support rods fixed to the front side and rear side of the mounting base portion.The above object has been achieved by providing a dust collecting cover for a drum cutter in which the cover body is joined integrally to the mounting base via the support rod by fastening the male threaded bolt members protruding from each end face portion with a nut member, and the inclination angle of the lower end opening surface of the cover body can be adjusted by adjusting the position where the male threaded bolt members are fastened in the curved fastening guide elongated hole.

[0008] In the dust collection cover body for a drum cutter of the present invention, the curved fastening guide elongated holes, which are curved in an arc shape along the curved shape of the upper cover portion, are formed in two rows in the cover body joining plate portion at different radial intervals from the rotary drive shaft, and two male threaded bolt members are fixed to each of the end face portions on both sides of the support rod at different radial intervals from the rotary drive shaft, so that the two male threaded bolt members are fastened to each of the two rows of the curved fastening guide elongated holes using nut members, thereby joining the cover body as a single unit to the mounting base portion via the support rod, and it is preferable that the inclination angle of the lower end opening surface of the cover body can be adjusted by adjusting the fastening position of each of the male threaded bolt members in each of the curved fastening guide elongated holes.

[0009] Furthermore, it is preferable that the dust collection cover body for a drum cutter of the present invention is arranged so that the suction connection port is positioned upstream of the circumferential central part of the upper cover portion in the direction of rotation of the cutting rotating drum, and is provided so as to protrude.

[0010] Furthermore, it is preferable that the dust collection cover body for a drum cutter of the present invention has a flexible plate material or a brush material consisting of a plurality of wires made of synthetic resin or metal attached around the entire periphery of the peripheral portion of the lower end opening surface of the cover body, extending beyond the edge of the rotational trajectory of the cutting rotating drum. [Effects of the Invention]

[0011] The dust collection cover body for a drum cutter of the present invention can easily and efficiently prevent dust particles generated when cutting a hard cutting object with a drum cutter attached to the tip of the arm of a backhoe heavy equipment from scattering into the surrounding area, and can also collect this dust particles. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic side view illustrating a backhoe heavy machine having a drum cutter as an attachment, to which a dust collecting cover body for a drum cutter according to a preferred embodiment of the present invention is attached. [Figure 2] 1 is a side view illustrating a dust collection cover for a drum cutter according to a preferred embodiment of the present invention. FIG. [Figure 3] 1 is a perspective view illustrating a dust collection cover for a drum cutter according to a preferred embodiment of the present invention. FIG. [Figure 4] 1 is a front view illustrating a dust-collecting cover body for a drum cutter according to a preferred embodiment of the present invention, showing the cover body in a see-through state. [Figure 5] 10A and 10B are perspective side views of the cover body, illustrating how the inclination angle of the lower end opening surface of the cover body is adjusted. DETAILED DESCRIPTION OF THE INVENTION

[0013] As shown in Figure 1, the dust collection cover body 10 for a drum cutter according to a preferred embodiment of the present invention is arranged to cover a pair of rotating cutting drums 21 that constitute the drum cutter 20 attached to the tip portion 31a of the arm portion 31 in a heavy backhoe machine 30 in which a drum cutter 20 is attached as an attachment instead of a bucket to the tip portion 31a of the arm portion 31, and is used as a cover body that prevents dust particles such as powder and flying stones that are generated when the drum cutter 20 cuts a hard cutting object such as a concrete structure or paved surface from scattering around and that allows the generated dust particles to be collected, preferably by sucking them up.

[0014] In this embodiment, the pair of rotating cutting drums 21 (see FIG. 4 ) constituting the drum cutter 20 are each a known cutting device, with a flat, disc-shaped drum portion 21a, for example, having a number of cutting picks 22 with embedded carbide tips protruding from the outer periphery thereof (see FIGS. 5( a) and 5(b) ). This allows the rotating cutting drum 21 to rotate while crushing and cutting hard materials such as concrete and rock using the cutting picks 22. Using the drum cutter 20 as an attachment for the backhoe heavy equipment 30 allows for cutting hard materials such as concrete structures and paved surfaces, enabling surface treatment of these materials. However, it is necessary to prevent the scattering of large amounts of dust and flying stones generated during cutting. To prevent this scattering, the dust-collecting cover 10 for the drum cutter of this embodiment is attached to cover the rotating cutting drum 21 of the drum cutter 20.

[0015] The dust collection cover body 10 for the drum cutter in this embodiment is a cover body for the drum cutter 20 that, as shown in Figure 1, is joined to cover a pair of cutting rotating drums 21 (see Figure 4) that constitute the drum cutter 20, which is attached in place of a bucket as an attachment to the tip portion of the arm portion of a backhoe heavy equipment, and is capable of sucking in and collecting dust that occurs during cutting.As shown in Figures 2 to 4, the drum cutter 20 is rotatably connected and supported to the tip portion 31a of the arm portion 31 of the backhoe heavy equipment 30 (see Figure 1), and is composed of an attachment base portion 25 having a rotating drive shaft 26 rotatably attached to a bearing portion 25a (see Figure 4) at the tip side, and a pair of cutting rotating drums 21 with multiple cutting pigs 22 protruding from the outer periphery, each fixed integrally to the rotating drive shaft 26 at the portion extending on both sides from the bearing portion 25a of the attachment base portion 25.

[0016] The dust collection cover body 10 for a drum cutter is composed of a pair of support rod portions 15 (see Figures 3 and 4) fixed to a portion of the mounting base portion 25 above the cutting rotating drum 21, and a pair of cover bodies 11 supported by the support rod portions 15 and arranged to cover at least the upper half of each cutting rotating drum 21.The pair of support rods 15 are arranged parallel to the rotary drive shaft 26 (see Figure 4) and are respectively attached to the front and rear sides of the mounting base portion 25 (see Figure 2), and male threaded bolt members 16 are fixed to each of the end face portions 15a on both sides in a protruding state.

[0017] Each cover body 11 has a hollow semicircular box shape including an upper cover portion 12 curved in a semicircular shape concentric with the rotary drive shaft 26 and disposed along the upper outer periphery of a pair of rotary cutting drums 21 and spaced from each other, and side cover portions 13 joined to the upper cover portion 12 at their peripheral edges and disposed along the outer side surfaces of the pair of rotary cutting drums 21 and spaced from each other, and is provided with a suction connection port 14 (see FIG. 3) protruding outward from the upper cover portion 12. Each cover body 11 is integrally attached with a curved band-shaped cover joint plate portion 17 extending along the outer periphery of the side cover portion 13 disposed along the outer side surfaces and projecting radially outward, and curved fastening guide elongated holes 18a, 18b are formed in this cover joint plate portion 17 and curved in an arc concentric with the rotary drive shaft 26 to follow the curved shape of the upper cover portion 12 (see FIG. 2).

[0018] The cover body 11 is joined integrally to the mounting base portion 25 via the support rods 15 by fastening the male threaded bolt members 16 protruding from each end surface 15a of a pair of support rods 15 fixed to the front and rear sides of the mounting base portion 25 to the curved fastening guide elongated holes 18a, 18b of the cover body joining plate portion 17 using nut members 16a, and the inclination angle of the lower end opening surface 11a of the cover body 11 can be adjusted by adjusting the fastening positions of the male threaded bolt members 16 in the curved fastening guide elongated holes 18a, 18b (see Figures 5(a) and (b)).

[0019] In this embodiment, preferably, the cover body joining plate portion 17 has curved fastening guide elongated holes 18a, 18b, which are curved in an arc shape along the curved shape of the top cover portion 12, formed in two rows at different radial intervals from the rotary drive shaft 26, and two fixed externally threaded bolt members 16 are fixed to each of the end face portions 15a on both sides of the support rod 15 at different radial intervals from the rotary drive shaft 26 (see FIG. 2). By fastening the two fixed externally threaded bolt members 16 to the two rows of curved fastening guide elongated holes 18a, 18b using nut members 16a, respectively, the cover body 11 is joined integrally to the mounting base portion 25 via the support rod 15. Furthermore, by adjusting the position where each male threaded bolt member 16 is fastened in each curved fastening guide long hole 18a, 18b, the inclination angle of the lower end opening surface 11a of the cover body 11 can be adjusted (see Figures 5(a) and (b)).

[0020] Furthermore, in this embodiment, a brush material 19 consisting of a flexible plate material or a number of wires made of synthetic resin or metal is attached around the entire periphery of the lower end opening surface 11a of the cover body 11, preferably extending beyond the edge of the rotational path of the cutting rotary drum 21 (see Figures 5(a) and (b)).

[0021] In this embodiment, the backhoe heavy equipment 30 is a heavy equipment that is widely used as a self-propelled excavator, preferably with a bucket attached as an attachment to the tip of the arm portion 31. The backhoe heavy equipment 30 can be used for purposes other than excavation by interchangeably attaching attachments other than the bucket. In this embodiment, as shown in FIG. 1, by attaching a drum cutter 20 to the tip portion 31a of the arm portion 31, it is possible to cut hard materials to be cut, such as concrete structures and paved surfaces, and it is used as a heavy equipment that can perform surface treatments on these materials.

[0022] The drum cutter 20 attached to the tip 31a of the arm 31 of the backhoe heavy equipment 30 includes a mounting base 25 and a pair of rotary cutting drums 21. Various known drum cutters may be used. Specifically, a commercially available drum cutter 20 manufactured by Atlas Copco, Inc., under the trade name "DC Drum Cutter," may be used. As shown in FIG. 4 , the mounting base 25 of the drum cutter 20 includes a rotary drive mechanism therein, and a bearing 25a is provided at the lower tip end for rotatably supporting a rotary drive shaft 26. A pair of rotary cutting drums 21 are integrally joined to the portions of the rotary drive shaft 26 that extend from the bearing 25a on both sides. These rotary cutting drums 21 can be rotated at a predetermined rotational speed by the driving force of the rotary drive mechanism. As described above, the pair of rotary cutting drums 21 each have a structure in which multiple cutting pigs 22 protrude from the outer periphery.

[0023] In this embodiment, a pair of steel support rods 15, which are disposed on the front and rear sides of the mounting base 25 at the upper base end portion of the bearing 25a of the mounting base 25 and constitute the dust-collection cover body 10, extend parallel to the central axis of the rotary drive shaft 26 and project slightly beyond the side ends of the pair of rotary cutting drums 21. The support rods 15 are fixedly attached, for example by bolts, to a portion above the rotary cutting drums 21. Two male-threaded bolt members 16 are preferably fixed by welding or the like to the end face portions 15a on both sides of each of the pair of support rods 15, protruding perpendicularly to the end face portions 15a at different radial intervals from the central axis of the rotary drive shaft 26.

[0024] The cover body 11, which together with the pair of support rod portions 15 constitute the drum cutter dust collection cover body 10, is formed using a thin steel plate, for example, about 3 mm thick, and as shown in Figures 2 and 3, has a hollow semicircular box-like shape with a pair of top cover portions 12 attached to both sides of the bearing portion 25a of the mounting base portion 25, which is arranged along the upper outer periphery of the pair of cutting rotating drums 21 and spaced apart from each other, and has a semicircular curved shape concentric with the rotary drive shaft 26, and side cover portions 13 joined to the outer side edge portion of each top cover portion 12 on the side opposite the bearing portion 25a, and spaced apart from each of the pair of cutting rotating drums 21 and arranged along the outer side surface portions thereof. A suction connection port 14 (see Figure 3) is provided on the outer peripheral surface of the top cover portion 12, protruding outward, and a cover body joining plate portion 17 is attached integrally to the side cover portion 13, extending along the outer peripheral edge portion thereof so as to protrude radially outward from the outer edge portion of the top cover portion 12.

[0025] The suction connection port 14 is a hollow cylindrical component that communicates with the internal space of the cover body 11, and is preferably positioned upstream of the circumferential center of the upper cover portion 12 in the direction of rotation of the cutting rotary drum 21, and is provided so as to protrude. This makes it possible to efficiently suck in and collect dust generated from the workpiece being cut as the cutting rotary drum 21 rotates. A suction pipe extending from a dust collector (not shown) is connected to the suction connection port 14, and the sucked dust can be discharged toward the dust collector, where it can be collected.

[0026] The cover joint plate 17 is a steel portion having a band-like shape that curves along the outer periphery of the side cover 13. As shown in FIG. 2, the cover joint plate 17 has two rows of curved fastening guide elongated holes 18a, 18b that curve in an arc concentric with the rotary drive shaft 26 along the curved shape of the top cover 12. The curved fastening guide elongated holes 18a, 18b are preferably formed at different radial intervals from the rotary drive shaft 26. Two male threaded bolt members 16 are fastened to the curved fastening guide elongated holes 18a, 18b, preferably in two rows, using nuts 16a, so that the cover body 11 is integrally joined to the mounting base 25 via the support rod 15. As described above, by adjusting the fastening positions of the male threaded bolt members 16 in the curved fastening guide elongated holes 18a, 18b, the inclination angle of the lower end opening surface 11a of the cover body 11 can be adjusted, as shown in FIGS. 5(a) and 5(b).

[0027] Furthermore, in this embodiment, as described above, a brush material 19 made of a flexible plate material or a large number of wires made of synthetic resin or metal is attached to the entire peripheral portion of the lower end opening surface 11a of the cover body 11, preferably around the entire circumference, in a state extending beyond the edge of the rotational path of the cutting rotary drum 21 (see FIGS. 5(a) and 5(b)). This prevents dust particles, flying stones, and other particles that are generated when the cutting rotary drum 21 of the drum cutter 20 cuts a hard object to be cut, such as a concrete structure or a paved surface, from leaking out from the gap between the lower end opening surface 11a of the cover body 11 and the object to be cut. This more effectively prevents dust particles from scattering, and also makes it possible to collect the dust particles more efficiently via the suction connection port 14.

[0028] As a result, with the drum cutter dust collection cover body 10 of this embodiment, it is possible to easily and efficiently prevent dust particles generated when cutting hard cutting objects such as concrete structures or paved surfaces using the drum cutter 20 attached to the tip portion 31a of the arm portion 31 of the backhoe heavy equipment 30 from scattering into the surrounding area, and it is also possible to smoothly collect this dust particles through the suction connection port 14.

[0029] Furthermore, according to this embodiment, the angle of inclination of the lower end opening surface 11a of the cover body 11 can be adjusted by adjusting the position at which each male threaded bolt member 16 is fastened in the curved fastening guide long holes 18a, 18b of the cover body joining plate portion 17. Therefore, for example, when operating the arm portion of a backhoe heavy equipment 30 to cut the inclined surface of a concrete structure, by adjusting the angle of inclination of the lower end opening surface 11a to match the inclination of the inclined surface, it becomes possible to cut even such an inclined cutting object while preventing dust from flying.

[0030] The present invention is not limited to the above-described embodiment and various modifications are possible. For example, the curved fastening guide elongated holes do not necessarily have to be formed in two rows at different radial intervals from the rotary drive shaft in the cover joining plate portion, and only one row may be formed. Two male threaded bolt members do not necessarily have to be fixed to each end face portion on both sides of the support rod at different radial intervals from the rotary drive shaft, and only two male threaded bolt members may be fixed to each end face portion. [Explanation of symbols]

[0031] 10 Drum cutter dust collection cover body 11 Cover body 11a Bottom opening surface 12 Top cover 13 Side cover 14 Suction connection port 15 Support rod part 15a End section 16 Male thread bolt component 16a Nut member 17 Cover body joining plate 18a, 18b Curved fastening guide slots 19 Brush material 20 Drum cutter 21 Cutting rotating drum 21a Drum section 22 Cutting pick 25 Mounting base 25a Bearing section 26 Rotating drive shaft 30 Backhoe heavy equipment 31 Arm section 31a Tip part

Claims

1. A dust collection cover body for a drum cutter that is attached to a pair of rotary cutting drums and that constitutes a drum cutter that can be attached instead of a bucket as an attachment to the tip of the arm of a backhoe heavy machine, and that can suck up and collect dust during cutting. The drum cutter is rotatably connected and supported at the tip of the arm of the backhoe heavy machine, and is configured to include an attachment base part to which a rotary drive shaft is rotatably attached at a bearing part at the tip side, and a pair of the cutting rotary drums having a plurality of cutting pigs protruding from the outer periphery, each of which is fixed integrally to the rotary drive shaft at a part protruding on both sides from the bearing part of the attachment base part, The dust collecting cover body for the drum cutter is configured to include a pair of support rod portions fixed to a portion of the mounting base portion above the cutting rotary drum, and a pair of cover bodies supported by the support rod portions and arranged to cover at least an upper half portion of each of the cutting rotary drums, The pair of support rods are arranged parallel to the rotation drive shaft, and are attached to the front and rear sides of the mounting base, respectively, and male threaded bolt members are fixed to the end faces on both sides in a protruding state, Each of the cover bodies has a hollow semicircular box shape including an upper cover portion having a semicircular curved shape concentric with the rotary drive shaft, which is spaced apart from the pair of rotary cutting drums and arranged along the upper outer periphery thereof, and a side cover portion whose peripheral edge is joined to the upper cover portion and which is spaced apart from the pair of rotary cutting drums and arranged along the outer side surface thereof, and a suction connection port is provided protruding outward from the upper cover portion, Each cover body has a curved band-shaped cover body joining plate portion that extends along the outer peripheral edge of the side cover portion that is arranged along the outer side surface portion and is integrally attached to the cover body in a state of projecting radially outward, and the cover body joining plate portion has a curved fastening guide elongated hole that curves in an arc concentric with the rotation drive shaft along the curved shape of the top cover portion, The cover body is joined to the mounting base as a single unit via the support rods by fastening the male threaded bolt members protruding from each end surface of a pair of support rods fixed to the front and rear sides of the mounting base to the curved fastening guide long holes of the cover body joining plate using nut members, and the inclination angle of the lower end opening surface of the cover body can be adjusted by adjusting the fastening position of the male threaded bolt members in the curved fastening guide long holes.

2. 2. The dust collection cover for a drum cutter according to claim 1, wherein the curved fastening guide elongated holes, which are curved in an arc shape along the curved shape of the upper cover portion, are formed in two rows in the cover body joining plate portion at different radial intervals from the rotary drive shaft, and two male threaded bolt members are fixed to each of the end face portions on both sides of the support rod at different radial intervals from the rotary drive shaft. By fastening the two male threaded bolt members to the two rows of the curved fastening guide elongated holes using nut members, the cover body is joined as a single unit to the mounting base portion via the support rod, and the inclination angle of the lower end opening surface of the cover body can be adjusted by adjusting the fastening position of each of the male threaded bolt members in each of the curved fastening guide elongated holes.

3. 3. A dust collection cover for a drum cutter as described in claim 1 or 2, wherein the suction connection port is positioned upstream of the circumferential central portion of the upper cover portion in the direction of rotation of the cutting rotating drum and is provided so as to protrude.

4. A dust collecting cover body for a drum cutter as described in claim 1 or 2, wherein a brush material consisting of a flexible plate material or a plurality of wires made of synthetic resin or metal is attached around the entire peripheral portion of the lower end opening surface of the cover body, extending beyond the edge of the rotational trajectory of the cutting rotating drum.

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