JP-2026075236-A - Multifunctional crushing tool, crushing device, and crushing method

JP2026075236AJP 2026075236 AJP2026075236 AJP 2026075236AJP-2026075236-A

Abstract

[Problem] To provide a multi-functional crushing tool that is resistant to damage, and a crushing device and crushing method that can crush the area around a borehole at a low running cost by using the multi-functional crushing tool. [Solution] The rock-splitting section and the small-breaking section are configured as follows as components of the multi-functional crushing tool. The rock-splitting section has a first contact portion that protrudes toward the first wall portion in a virtual orthogonal plane perpendicular to the axial direction, and is finished so that the position of the tip of the protrusion recedes toward the non-free surface side of the material to be crushed as the drilling direction progresses, extending in the axial direction, and a second contact portion that extends parallel to the drilling direction and has a shape that can freely contact the second wall portion on the non-free surface side of the material to be crushed in a planar manner. The small-breaking section is provided protruding in the axial direction from a position eccentric with respect to the axis toward the non-free surface side of the tip of the rock-splitting section, and is configured to break the material to be broken by applying external force while contacting the material to be broken. [Selection Diagram] Figure 2

Inventors

神島昭男

Assignees

株式会社神島組

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (4)

A multifunctional crushing tool having a shaft structure extending in the axial direction, a rear end that receives external forces applied from the outside along the axial direction, a rock-splitting section that splits a first wall portion on the free face side of the material to be crushed, around a pre-formed hole in the material to be crushed in the direction of hole formation, located closer to the front end than the rear end, and a small-splitting section that further splits the first wall portion removed from the material to be crushed after being split by the rock-splitting section, as a target for small-splitting. The aforementioned rock-splitting section is, A first contact portion is formed which protrudes toward the first wall portion in a virtual orthogonal plane perpendicular to the axial direction, and which extends toward the axial direction while the position of the tip of the protrusion recedes toward the non-free surface side of the material to be crushed as the drilling direction progresses, A second contact portion extends parallel to the drilling direction and has a shape that allows it to contact the second wall portion on the side opposite the free surface of the material to be crushed in a planar manner, The structure is configured such that the tip of the projection of the first contact portion abuts against the first wall portion, and the second contact portion abuts against the second wall portion, while the entire shaft structure is pushed into the bore along the bore formation direction, thereby pressing against the inner wall surface of the bore and introducing a crack from the bore into the first wall portion. The multi-functional crushing tool is characterized in that the small-breaking portion is provided protruding in the axial direction from a position eccentric with respect to the axis toward the non-free surface side of the tip of the rock-breaking portion, and is configured to break the target portion by applying external force while contacting the target portion.
A multi-functional crushing tool according to claim 1, A multi-functional crushing tool further comprising a ripping section provided between the rear end and the rock-splitting section, wherein the entire shaft structure moves in a ripping direction toward the free surface while contacting the first wall portion of the borehole into which the crack has been introduced, thereby excavating the portion to be crushed from the borehole.
A crushing device that crushes the area around a pre-formed hole in the material to be crushed in the direction of hole formation, A multi-functional crushing tool according to claim 1 or 2, A breaker that applies the external force to the multi-functional crushing tool by striking its rear end while holding it, A construction machine that, while holding the breaker, pushes the multi-functional crushing tool into the borehole and contacts the part of the crushing section with the part to be crushed, A crushing device characterized by being equipped with the following features.
A crushing method which involves crushing the area around a pre-formed bore in the direction of bore formation in the material to be crushed, A step of preparing the multi-functional crushing tool according to claim 1 or 2, The process of breaking rock around the bore is performed by aligning the axial direction with the bore formation direction, inserting the small breaking portion and the rock-breaking portion of the multi-functional crushing tool into the bore, and then pushing the multi-functional crushing tool in the bore formation direction while applying an external force to the rear end of the multi-functional crushing tool, A step of removing the first wall portion, which has been removed from the material to be crushed after being crushed by the rock-breaking section, as a portion to be broken into smaller pieces, from the material to be crushed. The process of breaking the target portion into smaller pieces by applying an external force to the rear end of the multi-functional crushing tool while the crushing portion of the multi-functional crushing tool is in contact with the target portion, A crushing method characterized by comprising the following:

Description

This invention relates to a crushing method for finely crushing a portion of a material to be crushed, such as bedrock, rock, or concrete structures, and to a multi-functional crushing tool suitable for said crushing method. The applicant has proposed a multi-functional crushing tool that enables the rapid and efficient fine crushing of a portion of the material to be crushed by introducing cracks into the first wall portion on the free surface side of the material to be crushed, around a pre-formed hole in the material to be crushed in the direction of hole formation (see Patent Document 1). This multi-functional crushing tool has a shaft structure extending in the axial direction and is broadly divided into a rear end, a rock-splitting section, a ripping section, and a small-breaking section, each performing the following functions. The rear end has the function of receiving external forces applied from the outside along the axial direction. The rock-splitting section has a shape that is symmetrical with respect to the axis towards the tip side of the rear end and tapers towards the tip. The rock-splitting section has the function of pressing against the inner wall surface of the borehole and introducing cracks from the borehole toward the free surface of the material to be crushed, as the entire shaft structure is pushed into the borehole along the direction of bore formation. The ripping section is provided between the rear end and the rock-splitting section, and has the function of excavating the first wall surface of the material to be crushed toward the free surface, as the entire shaft structure moves toward the free surface while contacting the first wall surface of the borehole where cracks have been introduced around it. Furthermore, the small-breaking section protrudes axially from the tip of the rock-breaking section, and by contacting the target area for breaking while applying external force transmitted through the rear end, ripping section, and rock-breaking section, it has the function of breaking the target area into smaller pieces. Japanese Patent Publication No. 2024-62039 This figure shows a first embodiment of a multi-functional crushing tool according to the present invention and a crushing apparatus for carrying out a crushing method using the tool.This diagram shows the configuration of a multi-functional crushing tool.This figure schematically illustrates a rock crushing method using the crushing device shown in Figure 1.This figure schematically illustrates a rock crushing method using the crushing device shown in Figure 1.This figure shows a second embodiment of the multi-functional crushing tool according to the present invention.This figure shows a third embodiment of the multi-functional crushing tool according to the present invention.This figure shows a fourth embodiment of the multi-functional crushing tool according to the present invention.This figure shows a fifth embodiment of the multi-functional crushing tool according to the present invention.This figure shows a sixth embodiment of the multi-functional crushing tool according to the present invention. Figure 1 shows a first embodiment of the multi-functional crushing tool according to the present invention and a crushing apparatus for implementing a crushing method using the tool. Figure 2 shows the configuration of the multi-functional crushing tool. Note that, for the purpose of ease of understanding, the dimensions and number of parts are exaggerated or simplified as necessary in these drawings and the drawings described later. Furthermore, in these drawings, the drilling direction of the bore 4 in the rock mass 3 is defined as the "-Z" direction, the direction from the bore 4 toward the free surface 31 of the rock mass 3 (corresponding to the "ripping direction" of the present invention) is defined as the "+Y" direction, and the direction perpendicular to these Y and Z directions is defined as the "X" direction. Furthermore, (a) in Figure 2 is a side view of the multi-functional crushing tool (multi-functional chisel) 1 viewed from the +Y direction side, (b) is a side view of the multi-functional crushing tool 1 viewed from the +X direction side, and (c-1) to (c-5) are cross-sectional views of the multi-functional crushing tool 1 in a virtual orthogonal plane perpendicular to the axial direction D1 at different positions in the axial direction D1. The multi-functional crushing tool 1, as shown in Figure 1, is attached to a hydraulic breaker 2 mounted on a construction machine 5 such as a backhoe used in sites involving rock crushing. As described later, it is a tool for continuously performing rock splitting, ripping, and small-scale crushing processes. More specifically, the hydraulic breaker 2 is attached to the arm 51 of the construction machine 5 via a bracket 52. This hydraulic breaker 2 includes a breaker body (not shown). This breaker body also has a cylinder 21 in its central part. By supplying pressurize