Dismantling machinery

Abstract

To provide a machine for demolition capable of stably reducing a noise occurring in a demolition work.SOLUTION: A giant breaker comprises a base machine and a breaker attachment 20. The breaker attachment 20 comprises a bubble release part 26, a foam cylinder 30 and a fixing member. The bubble release part 26 supplies bubbles around a chisel 25 to cover around the chisel 25 with bubbles. The foam cylinder 30 generates bubbles to be supplied to the chisel 25 using a solution. The fixing member fits the foam cylinder 30 in a direction orthogonal to a surface of a side bracket 22 of the breaker attachment 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a demolition machine used when demolishing a building or the like. [Background technology]

[0002] When demolishing a building made of reinforced concrete or the like, a demolition machine such as a giant breaker with a chisel (also called a chisel) attached to the end of an arm may be used. When this demolition machine is used for demolition work, a large amount of noise is generated during the work. Therefore, demolition machines configured to reduce noise have been considered (see, for example, Patent Document 1). The giant breaker described in Patent Document 1 includes a supply unit that supplies foam to reduce noise above the chisel attached to the end of the arm. When using the chisel for demolition, the chisel is covered with foam to reduce noise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-105044 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the foam covering the fleas is uneven, it is difficult to stably reduce noise. [Means for solving the problem]

[0005] A demolition machine that solves the above problem includes a foam discharge section that supplies foam around the chisel of a breaker attachment that has two spaced-apart side brackets, a cylindrical foaming tube that uses a solution to generate foam to be supplied to the chisel, and a connecting section that connects the two side brackets, and the foaming tube is fixed to the connecting section along the connecting section. Effect of the Invention

[0006] According to the present invention, noise generated during dismantling work can be stably reduced. [Brief description of the drawings]

[0007] [Figure 1] 1 is an overall perspective view illustrating a dismantling machine according to an embodiment; [Diagram 2] FIG. 4 is a side view of a breaker attachment provided at the tip of an arm of a demolition machine in an embodiment. [Diagram 3] FIG. 2 is a perspective view of the attachment according to the embodiment, seen from the chisel side. [Figure 4] FIG. 4 is a side view of a main part of the attachment as viewed from the rear side in the embodiment. [Diagram 5] FIG. 4 is a schematic diagram showing the relationship between a foaming cylinder and piping of a main part of the attachment in the embodiment. [Figure 6] 11 is an explanatory diagram illustrating the dismantling operation of the dismantling machine when the arm is extended and the chisel is positioned at an angle in an embodiment. FIG. [Figure 7] 11 is an explanatory diagram illustrating the dismantling operation of the dismantling machine in an embodiment when the arm is retracted and the chisel is arranged vertically. FIG. [Figure 8] FIG. 2 is an explanatory diagram of the tip of a chisel partially covered with foam in an embodiment. [Figure 9] FIG. 2 is an explanatory diagram of the tip of a chisel completely covered with foam in an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a specific embodiment of a dismantling machine will be described with reference to Figs. 1 to 9. As shown in Fig. 1, a giant breaker (impact type crushing device) 10 as a demolition machine of this embodiment includes a base machine 11 and a breaker attachment 20. Specifically, the base machine 11 includes a lower traveling body including a crawler 12, and an upper rotating body including an operation room 13 and a boom 14. An arm 15 that rotates in a vertical plane around the end of the boom 14 is attached to the end of the boom 14. The breaker attachment 20 is attached to the end of the arm 15. The operation room 13 is located behind the breaker attachment 20.

[0009] As shown in Fig. 2, the breaker attachment 20 has a hydraulic drive unit 21 located on the front side, a chisel 25, and a bracket that holds them. The chisel 25 is a rod-shaped member with a pointed tip that is roughly conical. The hydraulic drive unit 21 has a square tube shape, and is equipped with a drive mechanism that hydraulically moves the chisel 25 back and forth in the extension direction (axial direction). The tip of the chisel 25 protrudes from the hydraulic drive unit 21.

[0010] The hydraulic drive unit 21 is attached to the tip of the arm 15 via a side bracket 22. The side bracket 22 is a plate-like member having a substantially triangular shape, and fixes and supports the hydraulic drive unit 21 by sandwiching opposing side surfaces of the hydraulic drive unit 21. The two side brackets 22 are connected via a connecting part 23 formed in approximately the center. The connecting part 23 connects the two side brackets 22 at approximately the center, and maintains the distance between the two side brackets 22 such that they can be attached to the tip of the arm 15.

[0011] 3, the breaker attachment 20 is provided with a bracket cover 24 so as to cover the rear sides of the two side brackets 22. Furthermore, the bracket cover 24 is provided with a hole 24h.

[0012] 2 and 3, a ring-shaped foam discharger 26 is provided on the lower surface of the hydraulic drive unit 21. This foam discharger 26 is provided so that the upper end of the chisel 25 fits loosely into the central through-hole.

[0013] As shown in Fig. 2, foam path 26s is provided inside foam discharger 26. This foam path 26s has a plurality of openings around the through hole. Foam is discharged from these openings into the space between foam discharger 26 and chisel 25. Foam path 26s of foam discharger 26 communicates with L-shaped tube 27 provided on the rear side. L-shaped tube 27 is covered with metallic rectangular parallelepiped cover 28. The other end of L-shaped tube 27 is connected to foam supply hose 37, which will be described later.

[0014] As shown in FIG. 4, a cylindrical foaming cylinder 30 and a mixing chamber forming member 31 integrated therewith are fixed to the connecting portion 23 that connects the side brackets 22 with a fixing member such as a cable tie along the longitudinal direction of the connecting portion 23.

[0015] The foaming cylinder 30 and the mixing chamber forming member 31 are fixed to the connecting portion 23, and are attached to the breaker attachment 20 so as to extend in a direction substantially perpendicular to the surface of the side bracket 22 of the breaker attachment 20. Here, the surface of the side bracket 22 refers to a surface included in the side bracket of the plate-like member, and is not limited to a vertical surface, but also includes a surface slightly inclined (for example, about 15 degrees) relative to the vertical surface. In addition, the direction substantially perpendicular to the surface of the side bracket 22 means a direction in a range in which the conditions (speed and angle) of the flow of the solution to the mixing chamber forming member 31 and the flow of the bubbles from the foaming cylinder 30 do not change significantly so that the generation and outflow of bubbles can be considered to be substantially the same.

[0016] As shown in FIG. 5, the mixing chamber forming member 31 arranged on the upstream side of the foaming cylinder 30 is provided with a solution supply port 31a on the upstream side of the foaming cylinder 30 and the mixing chamber forming member 31 in the direction of the central axis C1.

[0017] A solution supply hose 33 is provided to the solution supply port 31a via an L-shaped pipe 32. This solution supply hose 33 is connected to a solution tank (not shown) in which the air bubble solution is stored. In this embodiment, a foaming agent that is mainly based on an anionic surfactant and can generate bubbles by foaming is used as the foaming solution. Here, examples of the anionic surfactant that can be used include sulfonates such as α-olefin sulfonates, α-sulfonic fatty acid methyl ester salts, and alkanesulfonates, sulfates such as alkyl sulfates and alkyl ether sulfates, and carboxylates such as fatty acid salts and alkyl ether carboxylates.

[0018] On the other hand, an air supply hose 34 is connected to the downstream side of the mixing chamber forming member 31, and compressed air is supplied by a compressor. A pressure relief valve 35 is provided near the connection part 31b of this air supply hose 34. The pressure relief valve 35 opens when the air in the air supply hose 34 is at or above a predetermined pressure, and releases the pressure in the air supply hose 34 to the outside.

[0019] The foaming cylinder 30 is a member that generates bubbles inside, and is configured by filling a circular tube with steel wool, which is a porous material. The discharge port 30a of the foaming cylinder 30 is provided on the downstream side in the direction of the central axis C1 of the foaming cylinder 30. In this embodiment, the discharge port 30a of the foaming cylinder 30, the mixing chamber forming member 31, and the solution supply port 31a are arranged on a straight line with the central axis C1. A foam supply hose 37 is connected to the outlet 30a via an L-shaped pipe .

[0020] 2 to 4, foam supply hose 37 is connected to L-shaped pipe 27 in cover 28 through hole 24h in bracket cover 24. The outer periphery of foam supply hose 37 exposed from side bracket 22 is covered with cushion member 38.

[0021] Next, the dismantling operation of the giant breaker 10 will be described with reference to FIGS. The giant breaker 10 is placed near the object to be demolished, with the tip of the chisel 25 positioned above the object to be demolished, such as reinforced concrete.

[0022] In this case, as shown in Fig. 6, when the object to be dismantled is far from the giant breaker 10, the boom 14 and the arm 15 are operated to be extended. Also, when the dismantling surface of the object to be dismantled 50 is inclined, the boom 14 and the arm 15 are operated so that the chisel 25 is positioned almost perpendicular to the dismantling surface.

[0023] 7, when the object 50 to be dismantled is close to the giant breaker 10, the boom 14 and the arm 15 are operated to be retracted. Furthermore, when the dismantling surface of the object 50 to be dismantled is a horizontal surface, the boom 14 and the arm 15 are operated so that the chisel 25 is positioned approximately vertically to this horizontal surface.

[0024] Then, the solution is supplied from the bubble solution tank to the foaming cylinder 30 through the solution supply hose 33 and the mixing chamber forming member 31. Furthermore, the compressor is operated to supply compressed air to the mixing chamber forming member 31 through the air supply hose 34. As a result, the solution mixed in the mixing chamber forming member 31 and the compressed air are supplied to the foaming cylinder 30, and foam is generated in the foaming cylinder 30. Then, the foam generated in the foaming cylinder 30 is supplied to the foam discharge part 26 through the foam supply hose 37 and the L-shaped pipe 27, and is supplied to the outer periphery of the chisel 25 through the foam path 26s of the foam discharge part 26.

[0025] In this case, as shown in FIG. 8, the supplied foam flows down from the upper end of the chisel 25 along the outer circumferential surface of the chisel 25 to the lower end, forming a foam-like body fa1, which covers the chisel 25 from above. 9, when foam is continuously supplied, the entire outer periphery of the chisel 25 is covered with foam-like body fa1. In this embodiment, foam is discharged so as to cover the surface of the chisel 25 with a foam thickness of about 40 mm from the surface of the chisel 25. When the hydraulic drive device is driven in this state, the chisel 25 supported by the hydraulic drive unit 21 reciprocates in the vertical direction at a predetermined speed, thereby crushing the surface of the dismantling object 50.

[0026] (action) The foaming cylinder 30 is attached to the connecting portion 23 of the breaker attachment 20 along the longitudinal direction. The foaming cylinder 30, the discharge port 30a, the mixing chamber forming member 31, and the solution supply port 31a are provided on the central axis C1. This allows the foaming cylinder 30 to be arranged in a direction perpendicular to the surface of the side bracket 22.

[0027] Therefore, as shown in Figs. 6 and 7, even if the breaker attachment 20 tilts, the foaming cylinder 30, the discharge port 30a, the mixing chamber forming member 31, and the solution supply port 31a can be kept at a predetermined angle with respect to the ground.

[0028] According to this embodiment, the following effects can be obtained. (1) In this embodiment, the foaming cylinder 30 is attached so as to extend in a direction substantially perpendicular to the surface of the side bracket 22. As a result, even if the boom 14, arm 15, and breaker attachment 20 of the giant breaker 10 are moved, the positional relationship and angle of the foaming cylinder 30 with respect to the ground do not change, so the foam generation conditions in the foaming cylinder 30 and the foam outflow conditions from the foaming cylinder 30 can be almost always the same, and foam can be generated stably. Therefore, the foam-like body fa1 can be evenly wrapped around the outer periphery of the chisel 25, so noise can be stably reduced.

[0029] (2) In this embodiment, the foaming cylinder 30, the discharge port 30a, the mixing chamber forming member 31, and the solution supply port 31a are arranged on the central axis C1 of the foaming cylinder 30. As a result, regardless of the inclination of the boom 14, the arm 15, and the breaker attachment 20, the liquid can be supplied to the foaming cylinder 30 under almost the same conditions, so that the foam can be stably generated and supplied to the foam release section 26. (3) In this embodiment, the foaming cylinder 30 is attached to the connecting portion 23 so as to extend along the connecting portion 23. Therefore, the foaming cylinder 30 can be efficiently positioned so as to extend in a direction approximately perpendicular to the surface of the side bracket 22.

[0030] (4) In this embodiment, the foaming cylinder 30 and the mixing chamber forming member 31 are disposed between the two side brackets 22, and therefore can be protected by the side brackets 22. Furthermore, in this embodiment, the discharge port 30a of the foaming cylinder 30 and the foam supply hose 37 are connected via an L-shaped pipe 36. As a result, even if the foam supply hose 37 is pulled out at a right angle to the foaming cylinder 30 disposed in the narrow space between the two side brackets 22, the flow path through which the foam flows is not destroyed, and the foam can be smoothly supplied to the foam release section 26.

[0031] (5) In this embodiment, the pressure relief valve 35 is provided in the air supply hose 34 near the connection portion 31b provided upstream of the foaming cylinder 30, so that the air pressure in the air supply hose 34 can be prevented from exceeding a predetermined pressure.

[0032] (6) In this embodiment, the L-shaped pipe 27 provided in the foam discharge section 26 is covered with a metallic rectangular parallelepiped cover 28. In addition, the portion of the foam supply hose 37 exposed from the side bracket 22 is covered with a cushion member 38. This protects the foam supply portion exposed from the bracket of the breaker attachment 20, thereby reducing damage even if the dismantling object 50 scatters and hits it.

[0033] This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction. In the above embodiment, the foaming cylinder 30 is configured by filling steel wool inside a circular tube. The configuration of the foaming cylinder 30 is not limited to this. For example, the foaming cylinder may be configured by filling sponge or beads, or may be configured as a tube with a square cross section.

[0034] In the above embodiment, the foaming cylinder 30 is fixed to the connecting portion 23 of the breaker attachment 20. The position where the foaming cylinder 30 is attached in the direction perpendicular to the surface of the side bracket 22 is not limited to the connecting portion 23. For example, the foaming cylinder 30 may be fixed to the boom 14 or the arm 15.

[0035] In the above embodiment, the breaker attachment 20 is used, which has a bracket including two side brackets 22, a connecting portion 23, and a bracket cover 24. The configuration and shape of the breaker attachment are not limited to this. For example, a breaker attachment that does not have a bracket cover may be used.

[0036] In the above embodiment, the breaker attachment 20 includes the chisel 25 having a generally cone-shaped pointed tip. The chisel provided on the breaker attachment 20 is not limited to a chisel having a generally cone-shaped pointed tip, and may have any other shape as long as it is used for dismantling, such as a chisel having a generally spatula shape.

[0037] In the above embodiment, a breaker that crushes by striking is used as the crushing tool. In a demolition machine (construction machine) equipped with another crushing tool (dismantling tool), the demolition work may be performed with the noise generating source covered with the foam body fa1.

[0038] In the above embodiment, reinforced concrete is used as the object to be demolition 50. The object to be demolition 50 is not limited to reinforced concrete, and may be made of other materials, such as a steel frame structure.

[0039] Next, the technical ideas that can be understood from the above embodiment and other examples will be described below. (a) a supply port for the solution and a discharge port for discharging the foam are disposed at positions opposite to each other in a longitudinal direction of the foaming cylinder; 3. The dismantling machine according to claim 1, wherein a supply port for air to be supplied to the solution is provided upstream of the foaming cylinder. [Explanation of symbols]

[0040] C1...central axis, fa1...foam body, 10...giant breaker, 11...base machine, 12...crawler, 13...operation room, 14...boom, 15...arm, 20...breaker attachment, 21...hydraulic drive unit, 22...side bracket, 23...connection unit, 24...bracket cover, 24h...hole, 25...chisel, 26...foam discharge unit, 26s...foam path, 27,32,36...L-shaped pipe, 28...cover, 30...foam cylinder, 30a...discharge port, 31...mixing chamber forming member, 31a...solution supply port, 31b...connection unit, 33...solution supply hose, 34...air supply hose, 35...pressure relief valve, 37...foam supply hose, 38...cushion member, 50...object to be dismantled.

Claims

[Claim 1] a foam discharge section for supplying foam around the chisel of the breaker attachment having two spaced apart side brackets; A cylindrical foaming tube that generates foam to be supplied to the flea using a solution; a connecting portion that connects the two side brackets, A dismantling machine, characterized in that the foaming cylinder is fixed to the connecting portion along the connecting portion.

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