JP2024001151A - Machine for demolition - Google Patents

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

The present invention relates to a demolition machine used when demolishing buildings and the like.

When demolishing a building made of reinforced concrete or the like, a demolition machine such as a giant breaker, which has a chisel attached to the end of its arm, is sometimes used. When demolition work is performed using this demolition machine, a large amount of noise is generated during the work. Therefore, a demolition machine having a configuration that can reduce noise is being considered (see, for example, Patent Document 1). The giant breaker described in Patent Document 1 includes a supply unit that supplies foam for noise reduction above a chisel provided at the tip of an arm. When dismantling using a chisel, the chisel is covered with foam to reduce noise.

Japanese Patent Application Publication No. 2018-105044

However, if the foam covering the fleas is uneven, it is difficult to stably reduce noise.

A demolition machine that solves the above problems includes a foam emitting part that supplies foam around a chisel of a breaker attachment that has two spaced apart side brackets, and a tube that uses a solution to generate foam that is supplied to the chisel. The device includes a shaped foam tube and a connection portion that connects the two side brackets, and the foam tube is fixed to the connection portion along the connection portion.

According to the present invention, it is possible to stably reduce noise generated during demolition work.

FIG. 1 is an overall perspective view illustrating a demolition machine in an embodiment. The side view of the breaker attachment provided at the tip of the arm of the demolition machine in an embodiment. FIG. 2 is a perspective view of the attachment in the embodiment as seen from the chisel side. FIG. 3 is a side view of the main parts of the attachment in the embodiment as seen from the rear side. FIG. 2 is a schematic configuration diagram showing the relationship between a foam tube and piping that are the main parts of an attachment in an embodiment. FIG. 3 is an explanatory diagram illustrating a disassembly operation of the disassembly machine when the arm is extended and the chisel is arranged at an angle in the embodiment. FIG. 2 is an explanatory diagram illustrating a disassembly operation of the disassembly machine when the arm is retracted and the chisel is arranged vertically in the embodiment. FIG. 2 is an explanatory diagram of the tip of a chisel partially covered with bubbles in the embodiment. FIG. 2 is an explanatory diagram of the tip of a chisel completely covered with bubbles in an embodiment.

An embodiment of a demolition machine will be described below 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 revolving body including an operation chamber 13 and a boom 14. An arm 15 is attached to the tip of the boom 14 and rotates in a vertical plane about the tip of the boom 14 . A breaker attachment 20 is attached to the tip of the arm 15. Note that the operation chamber 13 is located on the rear side of the breaker attachment 20.

As shown in FIG. 2, the breaker attachment 20 includes a hydraulic drive section 21 located on the front side, a chisel 25, and a bracket that holds these. The chisel 25 is a rod-shaped member with a substantially conical tip. The hydraulic drive unit 21 has a rectangular cylindrical shape and includes a drive mechanism that reciprocates the chisel 25 in the extending direction (axial direction) using hydraulic pressure. The tip of the chisel 25 protrudes from the hydraulic drive section 21.

The hydraulic drive unit 21 is attached to the tip of the arm 15 via a side bracket 22 of the bracket. The side bracket 22 is a substantially triangular plate-like member, and fixes and supports the hydraulic drive unit 21 by sandwiching opposing sides of the hydraulic drive unit 21 . The two side brackets 22 are connected via a connecting portion 23 formed approximately at the center. The connecting portion 23 connects the two side brackets 22 approximately at their centers, and maintains the distance between the two side brackets 22 at a distance that allows the two side brackets 22 to be attached to the tip of the arm 15.

As shown in FIG. 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.

As shown in FIGS. 2 and 3, a ring-shaped foam discharge section 26 is provided on the lower surface of the hydraulic drive section 21. As shown in FIGS. The foam discharge part 26 is provided so that the upper end of the chisel 25 is loosely fitted into the central through hole.

As shown in FIG. 2, a bubble path 26s is provided inside the bubble discharge section 26. This bubble path 26s is provided with a plurality of openings around the through hole. Foam is discharged from this opening into the space between the foam discharge part 26 and the chisel 25. A foam path 26s of the foam discharge section 26 communicates with an L-shaped pipe 27 provided on the rear side. The L-shaped tube 27 is covered with a rectangular parallelepiped metal cover 28. The other end of the L-shaped pipe 27 is connected to a foam supply hose 37, which will be described later.

As shown in FIG. 4, a cylindrical foam tube 30 and a mixing chamber forming member 31 integrated therein are attached to the connecting portion 23 that connects the side brackets 22 along the longitudinal direction of the connecting portion 23. , fixed with a fixing member such as a cable tie.

Since the foam tube 30 and the mixing chamber forming member 31 are fixed to the connecting portion 23, they 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. It will be done. Here, the surface of the side bracket 22 is 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) with respect to the vertical surface. In addition, the direction substantially perpendicular to the surface of the side bracket 22 refers to the flow of the solution to the mixing chamber forming member 31 and the flow of bubbles from the foaming cylinder 30, so that the generation and outflow of bubbles can be considered to be almost the same. means a range of directions in which the conditions (velocity and angle) do not change significantly.

As shown in FIG. 5, a solution supply port 31a is provided in the mixing chamber forming member 31 disposed upstream of the foaming tube 30 in the direction of the central axis C1 of the foaming tube 30 and the mixing chamber forming member 31. It will be done.

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 a bubble solution is stored.
In this embodiment, a foaming agent that is mainly based on an anionic surfactant and can generate foam by foaming is used as the foaming solution. Here, examples of anionic surfactants include sulfonates such as α-olefin sulfonates, α-sulfone fatty acid methyl ester salts and alkanesulfonates, alkyl sulfate ester salts, and alkyl ether sulfate ester salts. Carboxylate salts such as sulfates, fatty acid salts, and alkyl ether carboxylates can be used.

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 release valve 35 is provided near the connection portion 31b of the air supply hose 34. The pressure release valve 35 is opened when the air within the air supply hose 34 has a predetermined pressure or higher, and releases the pressure within the air supply hose 34 to the outside.

The foam tube 30 is a member that generates air bubbles inside, and is constructed by filling a circular tube with steel wool, which is a porous material.
The discharge port 30a of the foaming tube 30 is provided on the downstream side of the foaming tube 30 in the direction of the central axis C1. 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 of the central axis C1.
A foam supply hose 37 is connected to the discharge port 30a via an L-shaped pipe 36.

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

Next, the dismantling work of the giant breaker 10 described above will be explained using FIGS. 6 to 9.
The giant breaker 10 is placed near the object to be demolished, and the tip of the chisel 25 is placed above the object to be demolished, such as reinforced concrete.

In this case, as shown in FIG. 6, if the object to be dismantled is far from the giant breaker 10, the boom 14 and arm 15 are operated to extend. Further, when the dismantling surface of the object to be dismantled 50 is inclined, the boom 14 and arm 15 are operated so that the chisel 25 is arranged substantially perpendicular to the dismantling surface.

Further, as shown in FIG. 7, when the object to be dismantled 50 is close to the giant breaker 10, the boom 14 and arm 15 are operated to retract. Further, when the dismantling surface of the object to be dismantled 50 is a horizontal surface, the boom 14 and the arm 15 are operated so that the chisel 25 is arranged substantially perpendicular to this horizontal surface.

Then, the solution is supplied from the bubble solution tank to the foam tube 30 via 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 via the air supply hose 34. As a result, the solution and compressed air mixed in the mixing chamber forming member 31 are supplied to the foaming tube 30, and a foam is generated in the foaming tube 30. The foam generated in the foam tube 30 is supplied to the foam discharge section 26 via the foam supply hose 37 and the L-shaped pipe 27, and is supplied to the outer periphery of the chisel 25 via the foam path 26s of the foam discharge section 26. .

In this case, as shown in FIG. 8, the supplied foam flows down from the upper end of the chisel 25 to the lower end along the outer circumferential surface of the chisel 25 to form a foam fa1, and the supplied foam flows down from the upper end of the chisel 25 to the lower end. cover.
Thereafter, as shown in FIG. 9, when the foam is continuously supplied, the entire outer periphery of the chisel 25 is covered with the foam fa1. In this embodiment, foam is released from the surface of the chisel 25 so as to cover the surface of the chisel 25 with a foam thickness of approximately 40 mm. In this state, when the hydraulic drive device is driven, the chisel 25 supported by the hydraulic drive section 21 reciprocates in the vertical direction at a predetermined speed, thereby crushing the surface of the object to be dismantled 50.

(effect)
A foam tube 30 is attached along the longitudinal direction of the connecting portion 23 of the breaker attachment 20. 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. Thereby, the foam tube 30 can be arranged in a direction perpendicular to the surface of the side bracket 22.

Therefore, as shown in FIGS. 6 and 7, even if the breaker attachment 20 is tilted, the foam tube 30, the discharge port 30a, the mixing chamber forming member 31, and the solution supply port 31a can be maintained at a predetermined angle with respect to the ground.

According to this embodiment, the following effects can be obtained.
(1) In this embodiment, the foam tube 30 is attached to the surface of the side bracket 22 so as to extend in a direction substantially perpendicular to the surface. 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 foam cylinder 30 with respect to the ground do not change. The foam outflow conditions can be kept almost always the same, and foam can be generated stably. Therefore, the foam fa1 can be evenly attached to the outer periphery of the chisel 25, so that noise can be stably reduced.

(2) In this embodiment, the foaming tube 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 tube 30. As a result, regardless of the inclination of the boom 14, arm 15, and breaker attachment 20, liquid can be supplied to the foam tube 30 almost always under the same conditions, so that foam can be stably generated and foam can be released. 26.
(3) In this embodiment, the foam tube 30 is attached to the connecting portion 23 along the connecting portion 23, so the foam tube 30 extends in a direction substantially perpendicular to the surface of the side bracket 22. This allows for efficient placement.

(4) In this embodiment, the foam tube 30 and the mixing chamber forming member 31 are arranged between the two side brackets 22, so that they can be protected by the side brackets 22. Furthermore, in this embodiment, the discharge port 30a of the foam tube 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 right angles to the foam tube 30 placed in the narrow space between the two side brackets 22, the foam can be smoothly delivered to the foam discharge part 26 without crushing the flow path through which the foam flows. can be supplied to

(5) In this embodiment, since the pressure release valve 35 is provided in the air supply hose 34 near the connection part 31b provided upstream of the foam tube 30, the pressure of the air in the air supply hose 34 does not become higher than a predetermined pressure. can be suppressed.

(6) In this embodiment, the L-shaped tube 27 provided in the bubble discharger 26 is covered with a cover 28 made of metal and having a rectangular parallelepiped shape. Further, 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, so that even if the object 50 to be dismantled scatters and collides with it, damage can be reduced.

This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- In the above embodiment, the foam tube 30 is constructed by filling a circular tube with steel wool. The configuration of the foam tube 30 is not limited to this. For example, the foam tube may be filled with sponge, beads, etc., or may be a tube with a square cross section.

- In the above embodiment, the foam tube 30 was fixed to the connecting portion 23 of the breaker attachment 20. The position where the foam tube 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, it may be fixed to the boom 14 or arm 15.

- In the above embodiment, the breaker attachment 20 has a bracket including two side brackets 22, a connecting portion 23, and a bracket cover 24. The structure and shape of the breaker attachment are not limited to this. For example, a breaker attachment without a bracket cover may be used.

- In the above embodiment, the breaker attachment 20 includes a chisel 25 having a substantially conical tip. The chisel provided on the breaker attachment 20 is not limited to a shape with a substantially conical tip, and may have any other shape as long as it is used for demolition, such as a substantially spatula-shaped chisel.

- In the above embodiment, a breaker that crushes by striking is used as the crushing tool. Even in a demolition machine (construction machine) equipped with another crushing tool (demolition tool), the demolition work may be performed with the noise generation source covered with the foam fa1.

- In the above embodiment, reinforced concrete was used as the object 50 to be demolished. The object to be demolished 50 is not limited to reinforced concrete, and may be made of other materials such as a steel structure, for example.

Next, technical ideas that can be understood from the above embodiment and other examples will be additionally described below.
(a) the supply port for the solution and the discharge port for discharging the bubbles are arranged at opposing positions in the longitudinal direction of the foam tube;
3. The demolition machine according to claim 1, further comprising a supply port for supplying air to the solution on the upstream side of the foam tube.

C1... central axis, fa1... foam, 10... giant breaker, 11... base machine, 12... crawler, 13... operation room, 14... boom, 15... arm, 20... breaker attachment, 21... hydraulic drive section, 22 ...Side bracket, 23...Connection part, 24...Bracket cover, 24h...Hole, 25...Chisel, 26...Bubble release part, 26s...Bubble path, 27, 32, 36...L-shaped pipe, 28...Cover, 30...Foaming Cylinder, 30a...Discharge port, 31...Mixing chamber forming member, 31a...Solution supply port, 31b...Connection part, 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 (1)

a foam ejector for supplying foam around a chisel of a breaker attachment having two spaced apart side brackets;
a cylindrical foam tube that uses a solution to generate bubbles to be supplied to the chisel;
and a connecting portion connecting the two side brackets,
The demolition machine is characterized in that the foam tube is fixed to the connecting portion along the connecting portion.