JP2022145366A - Rock breaking tool and crushing method using the tool - Google Patents

Abstract

To provide a rock breaking tool capable of efficiently breaking an object to be treated such as a rock, bedrock, or concrete structure with a relatively large force, and a crushing method capable of efficiently crushing the object to be treated using the tool.SOLUTION: In this invention, as a plate-side wedge member moves toward a bottom surface together with a movable plate portion by applying an external force toward the bottom surface to the movable plate portion, a first blade member moves in a first radial direction Y1 while sliding along a first base-side inclined surface and a first plate-side inclined surface to press an inner wall of a drilled hole 21, and a second blade member moves in a second radial direction Y2 while sliding along a second base-side inclined surface and a second plate-side inclined surface to press the inner wall of the drilled hole 21.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock splitting tool for splitting an object to be treated such as bedrock, rock, concrete structure, etc., and a crushing technique for crushing the object to be treated using the tool.

Conventionally, a wedge member (sometimes called a wedge) and a blade member (sometimes called a liner) are used as rock splitting tools for splitting objects such as rocks, bedrock, and concrete structures. So-called seri arrows are known. For example, Patent Literature 1 describes a technique for breaking an object to be processed using a rock breaking tool that combines a wedge member and a blade member. More specifically, a rock drilling machine is used to drill a hole in the rock in advance, a rock splitting tool consisting of a wedge member and a blade member is inserted into the drilled hole, and the rear end of the wedge member is hit by a breaker to split the rock. Crushing bedrock.

In the rock breaking tool, it is possible to use a working machine as an auxiliary for the work of inserting each blade member and wedge member into the drilled hole and the work of recovering each blade member and wedge member after crushing the rock. . However, the crushing work using the rock breaking tool involves a lot of manual work. For example, it is necessary to insert the blade members individually into the drilled hole before striking with the breaker, and to separate the blade members from each other in the drilled hole to form a gap for inserting the tip of the wedge member. . Also, after the wedge members are pulled out from the blade members after the crushing is completed, manual labor is required to check the positions of the blade members separated from each other in the crushing area and collect them individually. Such manual work must be performed for each rock splitting tool, and this has been one of the main factors that reduce the efficiency of the crushing process using the rock splitting tool.

Therefore, the applicant of the present application proposed that between the base portion and the bracket portion, a connecting body in which the first lower arm and the first upper arm are connected by the first connecting movable portion, and a second lower arm and the second upper arm. and a connecting body connected by a second connecting movable part (see Patent Document 2). After the rock breaking tool is inserted into the drilled hole, when an external force is applied to the bracket portion toward the bottom surface of the drilled hole, the bracket portion descends toward the bottom surface of the drilled hole. The second connecting movable parts move in the first radial direction and the second radial direction, respectively, and press against the inner wall of the drilled hole to perform the rock breaking process. As a result, it has become possible to efficiently split rocks, rocks, concrete structures, and other objects to be treated.

Japanese Patent Application Laid-Open No. 2006-225925 (Fig. 3) Patent No. 6817512

In the rock breaking tool described in Patent Document 2, the base portion and the bracket portion are connected by two connecting bodies, and the link mechanism of these connecting bodies allows the first connecting movable portion and the second connecting movable portion to move according to the movement of the bracket portion. The movable parts are moved in the first radial direction and the second radial direction to press the inner wall of the drilled hole. Therefore, the external force that can be applied to the bracket portion is relatively small enough not to damage the link mechanism, and the usable range of the rock splitting tool is limited to objects that can be split with a relatively small force.

The present invention has been made in view of the above problems, and is a rock splitting tool capable of efficiently splitting rocks, bedrock, concrete structures, and other objects to be treated with a relatively large force, and processing using the tool. An object of the present invention is to provide a crushing method capable of efficiently crushing an object.

A first aspect of the present invention is a rock breaking tool comprising a base portion supported by the bottom surface of a drilled hole formed in an object to be processed, and a base portion projecting sagittally toward the opening of the drilled hole. a base-side wedge member, a movable plate portion provided movably along the depth direction of the drilled hole on the opening side of the drilled hole, and a movable plate portion projecting sagittally toward the bottom surface of the drilled hole a plate-side wedge member, a first base-side inclined surface provided on a first radial side surface of the base-side wedge member in the radial direction of the drilled hole inside the drilled hole, and a first radial direction surface of the plate-side wedge member. a first blade member arranged slidably with respect to the first base-side inclined surface and the first plate-side inclined surface between the first plate-side inclined surface provided on the side surface; A second base-side inclined surface provided on the second radial side surface of the base-side wedge member in the radial direction of the drilled hole, and a second plate-side inclined surface provided on the second radial side surface of the plate-side wedge member. In between, the second blade member is slidably disposed with respect to the second base-side inclined surface and the second plate-side inclined surface, and the first blade member and the second blade member are ground with respect to the base-side wedge member. a base-side connecting portion that connects movably in the radial direction of the hole; a plate-side connecting portion that connects the first blade member and the second blade member to the plate-side wedge member so as to move in the radial direction of the drilled hole; and the first blade member tilts toward the first base side as the plate-side wedge member moves toward the bottom surface together with the movable plate portion when an external force is applied to the movable plate portion toward the bottom surface. While sliding along the surface and the first plate-side inclined surface, the second blade member moves in the first radial direction to press the inner wall of the drilled hole, and the second blade member moves the second base-side inclined surface and the second plate-side inclined surface. It is characterized in that it moves in the second radial direction while sliding along and presses the inner wall of the drilled hole.

A second aspect of the present invention is the rock breaking tool according to the first aspect, further comprising a long shaft extending along the drilled hole on the opening side of the drilled hole with respect to the movable plate portion, A first end face facing the movable plate portion of both end faces of the long shaft contacts the movable plate portion, while a second end face opposite to the first end face receives an external force, thereby allowing the long shaft to move the external force. Transmit to the plate section.

Further, according to a third aspect of the present invention, in the rock breaking tool according to the second aspect, the facing surface of the movable plate facing the first end surface of the long shaft and the first end surface of the long shaft have: One side is finished to be concave and the other side is finished to be convex, so that they are in slidable contact with each other.

Further, according to a fourth aspect of the present invention, in the rock breaking tool according to the second or third aspect described above, a a first engaging portion having a first inclined surface that can be engaged with the periphery of the opening of the drilled hole at the distal end portion projecting in one radial direction; a second engaging portion projecting in the radial direction and having a second inclined surface engageable with the periphery of the opening of the drilled hole at the distal end portion projecting in the second radial direction; The surface and the second inclined surface are inclined so that the amount of protrusion from the neighboring area increases in the direction from the first end surface toward the second end surface, and the movable plate portion and the plate-side wedge member are inclined by applying an external force. As the long shaft body moves toward the bottom surface together with the The first engaging portion presses the periphery of the opening of the drilled hole in the first radial direction, and the second engaging portion presses the periphery of the opening of the drilled hole in the second radial direction.

In a fifth aspect of the present invention, the rock breaking tool according to the first aspect is inserted into a drilled hole with the first blade member and the second blade member close to each other, and the base portion is placed on the bottom surface. By applying an external force toward the bottom surface to the movable plate portion of the rock breaking tool inserted into the drilled hole, the distance between the movable plate portion and the base portion is shortened and the distance is increased. and crushing the periphery of the drilled hole by pressing the first blade member and the second blade member against the inner wall of the drilled hole according to the shortening.

Further, according to a sixth aspect of the present invention, a first rock breaking tool having the same configuration as the rock breaking tool according to the first aspect is inserted into a drilling hole with the first blade member and the second blade member in close proximity to each other. and placing the base portion of the first rock breaking tool on the bottom surface; and inserting the first rock breaking tool into the drilling hole. into the drilling hole with the first blade member and the second blade member close to each other, and placing the base portion of the second rock breaking tool on the movable plate portion of the first rock breaking tool; By applying an external force toward the bottom surface to the movable plate portion of the second rock breaking tool inserted in the hole, the distance between the movable plate portion and the base portion of each of the first rock breaking tool and the second rock breaking tool inside the drilling hole and crushing the periphery of the drilled hole by pressing the first blade member and the second blade member against the inner wall of the drilled hole according to the shortening of the distance.

In a seventh aspect of the present invention, the direction of movement of the first blade member and the second blade member in the second rock breaking tool is different from the direction of movement of the first blade member and the second blade member in the first rock breaking tool. , the second rock breaking tool is placed on the movable plate portion of the first rock breaking tool.

An eighth aspect of the present invention is a crushing method for crushing a periphery of a drilled hole using the rock breaking tool according to the second or third aspect, wherein the first blade member and the second blade member are mutually The base portion, the base-side wedge member, the movable plate portion, the plate-side wedge member, the first blade member, the second blade member, the base-side connecting portion, and the plate-side connecting portion are integrally inserted into the drilled hole while being close to each other. inserting the long shaft into the drilled hole to bring the first end face of the long shaft into contact with the movable plate; and moving the first end face of the long shaft. By applying an external force to the second end surface of the long shaft while it is in contact with the plate portion, the distance between the movable plate portion and the base portion is shortened inside the drilled hole, and the distance is reduced according to the shortened distance. and a step of crushing the periphery of the drilled hole by pressing the first blade member and the second blade member against the inner wall of the drilled hole.

Further, a ninth aspect of the present invention is a crushing method for crushing the periphery of a drilled hole using the rock breaking tool according to the fourth aspect, wherein the first blade member and the second blade member are in close proximity to each other. In this state, the base portion, the base-side wedge member, the movable plate portion, the plate-side wedge member, the first blade member, the second blade member, the base-side connecting portion, and the plate-side connecting portion are integrally inserted into the drilled hole to form the base. inserting the long shaft into the drilled hole to bring the first end face of the long shaft into contact with the movable plate portion; a step of bringing the second inclined surface of the second engaging portion into contact with the circumference of the opening of the drilled hole; By applying an external force to the second end face of the long shaft body in a state where the second inclined surface of the second engaging part is in contact with the periphery of the opening of the drilled hole, the movable plate part and the base part are moved inside the drilled hole. By shortening the distance, the inner wall of the drilled hole is pressed by the first blade member and the second blade member according to the shortening of the distance, and the opening of the drilled hole is pressed by the first engaging portion and the second engaging portion. and crushing the periphery of the drilled hole by pressing the periphery.

As described above, according to the present invention, the first blade member and the second blade member are connected to the base side wedge member by the base side connecting portion so as to be movable in the radial direction of the drilled hole, and the plate side wedge member A first blade member and a second blade member are connected to the member by a plate-side connecting portion so as to be movable in the radial direction of the drilled hole. Therefore, a plurality of elements constituting the rock breaking tool can be collectively inserted into the drilling hole. In addition, even after breaking the rock, those elements can be recovered collectively.

In addition, since it has the connection structure as described above, the first blade member and the second blade member are drilled through the connection structure in response to the external force being applied toward the bottom surface of the movable plate portion. Although it moves toward the inner wall of the and presses, the pressing force is relatively small as described above. However, in this embodiment, as the plate-side wedge member moves toward the bottom surface together with the movable plate portion in response to the application of the external force, the first blade member moves toward the first base-side inclined surface and the first plate side. While sliding along the inclined surface, it moves in the first radial direction to press the inner wall of the drilled hole, and the second blade member slides along the second base-side inclined surface and the second plate-side inclined surface. while moving in the second radial direction to press the inner wall of the drilled hole. In this way, the blade member is moved by a mechanism other than the link mechanism to further press the inner wall of the drilled hole. Moreover, the mechanism for moving the blade members in the radial direction by sliding the blade members along the inclined surface can apply a relatively large force and has excellent breaking strength. As a result, objects to be treated such as rocks, bedrock, and concrete structures can be split efficiently with a relatively large force.

1 is a diagram showing a rock breaking tool and a breaker used when carrying out the first embodiment of the breaking method according to the present invention; FIG. FIG. 2 is a view showing the configuration of the rock breaking tool shown in FIG. 1; FIG. 2(b) is a view taken along line III-III of the rock splitting tool shown in FIG. 2(b). BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically 1st Embodiment of the crushing method which concerns on this invention. FIG. 5 is a side view showing a second embodiment of the rock breaking tool according to the present invention; 6A and 6B are views of the rock breaking tool shown in FIG. 5 viewed from various directions; It is a figure which shows typically 3rd Embodiment of the crushing method which concerns on this invention. FIG. 5 is a diagram schematically showing a rock breaking tool for carrying out a fourth embodiment of the crushing method according to the present invention; FIG. 9 is an enlarged view of the rock breaking tool shown in FIG. 8; It is the figure which further expanded a part of rock breaking tool used by 4th Embodiment. It is a figure which shows typically 4th Embodiment of the crushing method which concerns on this invention. It is a figure which shows typically 5th Embodiment of the crushing method which concerns on this invention. 1 is a diagram showing a rock breaking tool and a breaker used when carrying out the first embodiment of the breaking method according to the present invention; FIG. 14 is an enlarged view of the rock breaking tool shown in FIG. 13; FIG.

<First Embodiment>
A first embodiment of the crushing method according to the present invention comprises the following steps (1) to (4),
Step (1): forming a hole in an object to be treated such as a rock, bedrock or concrete structure;
Step (2): inserting the rock breaking tool according to the present invention into the drilling hole;
Step (3): The movable plate portion of the rock breaking tool is hit by the piston of the breaker and press-fitted toward the bottom surface of the drilled hole to split the rock around the drilled hole.
Step (4): recovering the rock breaking tool after removing the breaker;
, the object to be processed is split into rocks, and the periphery of the drilled hole is crushed. In order to particularly improve the crushing efficiency, a rock splitting tool, which will be described below, is used.

FIG. 1 is a diagram showing a rock breaking tool and a breaker used when performing a first embodiment of the crushing method according to the present invention, and the rock breaking tool corresponds to the first embodiment of the rock breaking tool according to the present invention. ing. 2A and 2B are views showing the configuration of the rock breaking tool shown in FIG. 1, in which FIG. 2A is an exploded view and FIG. 2B is a side view showing the rock breaking tool after assembly. FIG. 3 is a view taken along line III--III of the rock breaking tool shown in FIG. 2(b). In addition, XYZ orthogonal coordinate axes are set in order to uniformly show the directions in each figure. Here, the axial direction of the Z axis represents the depth direction of forming the drilled hole 21 with respect to the object 2 to be processed, and the bottom surface 211 of the drilled hole 21 is positioned in the Z2 direction, while the opening of the drilled hole 21 is in the Z1 direction. 212 is located. The axial direction of the Y-axis perpendicular to the depth direction Z of the drilled hole 21 corresponds to the radial direction of the drilled hole 21, of which Y1 corresponds to the first radial direction and Y2 corresponds to the second radial direction. there is Further, an axis orthogonal to both the Z-axis and the Y-axis is defined as the X-axis, one of which is defined as the X1 direction and the other as the X2 direction.

The rock breaking tool 1A includes a base portion 11 having a substantially oval shape when viewed from above. The base portion 11 has a longer diameter (Y-direction size) slightly shorter than the inner diameter of the drilled hole 21 and a shorter diameter (X-direction size) shorter than the longer diameter. 21 can be inserted. The base portion 11 is inserted into the drilled hole 21 , and the plane of the base portion 11 on the Z2 direction side is engaged with the bottom surface 211 of the drilled hole 21 so that the bottom surface 211 can support the base portion 11 . The shape of the base portion 11 is not limited to this, and may be any shape as long as it is inserted into the drilled hole 21 and stably supported on the bottom surface 211, and may be circular, for example. This also applies to the movable plate portion 13, which will be described later.

A base-side wedge member 12 projects sagittally from the center of the plane of the base portion 11 in the Z1 direction toward the opening 212 of the drilled hole 21 . The side surface in the Y1 direction and the side surface in the Y2 direction of the base-side wedge member 12 are finished as inclined surfaces. In order to distinguish between the two inclined surfaces, the side surface on the Y1 direction side is hereinafter referred to as a first base side inclined surface 121 and the side surface on the Y2 direction side is referred to as a second base side inclined surface 122 . A shaft 123 extending in the X direction is inserted near the top of the base-side wedge member 12, and both ends are fixed to the base-side wedge member 12 so as to protrude in the X1 and X2 directions. These protruding portions function as pins 124 that pivotally support a link bar of a base-side connecting portion, which will be described later, on the base-side wedge member 12 side.

At a position away from the base portion 11 in the Z1 direction, a movable plate portion 13 is provided movably along the depth direction Z of the drilled hole 21 on the opening side (Z2 direction side) of the drilled hole 21 . Like the base portion 11 , the movable plate portion 13 also has a substantially oval shape when viewed from above, and can be inserted into the drilled hole 21 through the opening 212 of the drilled hole 21 . A female screw for an eyebolt 19 is threaded in the central portion of the upper surface (main surface on the Z1 direction side) of the movable plate portion 13 . The rock breaking tool 1A has a symmetrical shape in the vertical direction Z and can be used upside down.

A plate-side wedge member 14 projects from the center of the plane of the movable plate portion 13 in the Z2 direction toward the bottom surface 211 of the drilled hole 21 in an arrow shape. The side surface in the Y1 direction and the side surface in the Y2 direction of the plate-side wedge member 14 are finished as inclined surfaces. In order to distinguish between the two inclined surfaces, the side surface on the Y1 direction side is hereinafter referred to as a first plate side inclined surface 141 and the side surface on the Y2 direction side is referred to as a second plate side inclined surface 142 . The absolute values of the inclination angles of the inclined surfaces 121, 122, 141 and 142 are the same. A shaft 143 extending in the X direction is inserted in the vicinity of the top of the plate-side wedge member 14 and fixed to the plate-side wedge member 14 with both ends protruding in the X1 and X2 directions. These projecting portions function as pins 144 that pivotally support link bars 181 and 182 of the plate-side connecting portion 18, which will be described later, on the plate-side wedge member 14 side.

In this manner, the movable plate portion 13 and the plate-side wedge member 14 are integrated, and are movable integrally within the drilled hole 21 according to the application of an external force. For example, when the breaker 3 applies a striking force to the movable plate portion 13, the plate-side wedge member 14 moves in the Z2 direction together with the movable plate portion 13, and the distance from the base-side wedge member 12 is shortened. , and the base-side wedge member 12, the first blade member 15 and the second blade member 16 are interposed, so that the base-side wedge member 12 does not collide.

In the first blade member 15, as shown in FIG. 2(a), an inclined surface 151 is provided on the side surface in the Y2 direction and is slidable with respect to the first base-side inclined surface 121 and the first plate-side inclined surface 141, respectively. , 152 are provided. In the first blade member 15 , the inclined surface 151 is inclined with respect to the first base-side inclined surface 121 between the first base-side inclined surface 121 and the first plate-side inclined surface 141 inside the drilled hole 21 . It is slidable, and the inclined surface 152 is arranged so as to be slidable with respect to the first plate side inclined surface 141 . On the other hand, on the side surface of the first blade member 15 on the Y1 direction side, a band-shaped groove is formed in the central portion in the Z direction. For this reason, as will be described later, when the first blade member 15 is moved in the Y1 direction, the upper and lower end portions of the side surface on the Y1 direction side are in close contact with the inner wall of the drilled hole 21 and directed in the Y1 direction. to apply pressure. That is, the pressing force can be applied to the inner wall of the drilled hole 21 in two stages, upper and lower. A shaft 153 extending in the X direction is inserted through the lower end of the first blade member 15, and both ends are fixed to the first blade member 15 so as to protrude in the X1 and X2 directions. These protruding portions function as pins 154 that pivotally support a link bar 171 of the base-side connecting portion 17, which will be described later, on the first blade member 15 side. Further, a shaft 155 extending in the X direction is inserted through the upper end portion of the first blade member 15, and both ends are fixed to the first blade member 15 in a form projecting in the X1 direction and the X2 direction. These protruding portions function as pins 156 that pivotally support a link bar 181 of the plate-side connecting portion 18, which will be described later, on the first blade member 15 side.

In the second blade member 16, inclined surfaces 161 and 162 are provided on the Y1 direction side surface so as to be slidable with respect to the second base side inclined surface 122 and the second plate side inclined surface 142, respectively. In the second blade member 16, the inclined surface 161 is inclined with respect to the second base-side inclined surface 122 between the second base-side inclined surface 122 and the second plate-side inclined surface 142 inside the drilled hole 21. It is slidable, and the inclined surface 162 is arranged so as to be slidable with respect to the second plate side inclined surface 142 . On the other hand, on the side surface of the second blade member 16 on the Y1 direction side, a band-shaped groove is formed in the central portion in the Z direction. For this reason, as will be described later, when the second blade member 16 is moved in the Y2 direction, the upper and lower end portions of the side surface on the Y2 direction side are in close contact with the inner wall of the drilled hole 21 and directed in the Y2 direction. to apply pressure. That is, the pressing force can be applied to the inner wall of the drilled hole 21 in two stages, upper and lower. A shaft 163 extending in the X direction is inserted through the lower end of the second blade member 16, and both ends are fixed to the second blade member 16 so as to protrude in the X1 and X2 directions. These protruding portions function as pins 164 that pivotally support a link bar 172 of the base-side connecting portion 17, which will be described later, on the second blade member 16 side. Further, a shaft 165 extending in the X direction is inserted through the upper end portion of the second blade member 16, and both ends are fixed to the second blade member 16 in a form projecting in the X1 direction and the X2 direction. These protruding portions function as pins 166 that pivotally support a link bar 182 of the plate-side connecting portion 18, which will be described later, on the second blade member 16 side.

A base side connecting portion 17 is provided on the lower end side of the rock breaking tool 1A. The base side connecting portion 17 has two link bars 171 and 172 . Both ends of the link bars 171 and 172 are provided with elongated holes. The elongated hole on the Y1 direction side of the link bar 171 is rotatably attached to the pin 154 , and the elongated hole on the Y2 direction side is rotatably attached to the pin 124 . The elongated hole on the Y1 direction side of the link bar 172 is rotatably attached to the pin 124 , and the elongated hole on the Y2 direction side is rotatably attached to the pin 164 . Therefore, the first blade member 15 and the second blade member 16 are connected to the base-side wedge member 12 so as to be movable in the radial direction Y of the drilled hole 21 on the lower end side of the rock breaking tool 1A.

A plate-side connecting portion 18 is provided on the upper end side of the rock breaking tool 1A. This plate-side connecting portion 18 has two link bars 181 and 182 . Both ends of the link bars 181 and 182 are provided with elongated holes. The elongated hole on the Y1 direction side of the link bar 181 is rotatably attached to the pin 156 , and the elongated hole on the Y2 direction side is rotatably attached to the pin 144 . The elongated hole on the Y1 direction side of the link bar 182 is rotatably attached to the pin 144 , and the elongated hole on the Y2 direction side is rotatably attached to the pin 166 . Therefore, the first blade member 15 and the second blade member 16 are connected to the plate-side wedge member 14 so as to be movable in the radial direction Y of the hole 21 on the upper end side of the rock breaking tool 1A.

Thus, in the rock breaking tool 1A, as shown in FIG. The member 15 and the second blade member 16 are interconnected by two connecting portions 17,18. Then, the first blade member 15 and the second blade member 16 are arranged to approach and separate from each other in accordance with a change in the distance between the base-side wedge member 12 and the plate-side wedge member 14 (hereinafter referred to as "inter-wedge distance"). It is configured.

Further, when the wedge-to-wedge distance is shortened, the inclined surfaces 151 and 152 slide along the first base-side inclined surface 121 and the first plate-side inclined surface 141, respectively, so that the first blade member 15 moves to the first position. It moves in the radial direction Y1 and presses the inner wall of the drilled hole 21 in the Y1 direction. At the same time, the inclined surfaces 161 and 162 slide along the second base-side inclined surface 122 and the second plate-side inclined surface 142, respectively, so that the second blade member 16 moves in the second radial direction Y2 and is ground. The inner wall of the hole 21 is pressed in the Y2 direction. In order to smooth the sliding of the first blade member 15 and the second blade member 16 with respect to the base-side wedge member 12 and the plate-side wedge member 14, respectively, as shown in FIG. A groove TR for supplying a is provided in each inclined surface.

A breaker 3 for applying an external force toward the base portion 11 to the movable plate portion 13 to move it in the Z2 direction is attached to an arm 51 of a construction vehicle 5 such as a hydraulic power excavator through a bracket 52 as shown in FIG. installed. Therefore, the operator can control the position and attitude of the breaker 3 by controlling the position and angle of the arm 51 by operating the control lever of the construction vehicle 5 and the like.

Next, referring to FIG. 4, a method of breaking and crushing the object 2 to be processed using the rock breaking tool 1A and the breaker 3 configured as described above will be described. FIG. 4 is a diagram schematically showing a first embodiment of the crushing method according to the present invention. The upper part of the figure is a schematic diagram of the inside of the drilled hole 21 viewed from the X2 direction, and the lower part is a diagram of the inside of the drilled hole 21 viewed from above. In the figure, in order to clarify the moving operations of the base portion 11, the base-side wedge member 12, the movable plate portion 13, the plate-side wedge member 14, the first blade member 15, and the second blade member 16, The illustration of the configuration (pins and link bars) is omitted.

In this embodiment, as shown in FIG. 4A, drilling holes 21 are formed in the processing object 2 in the Z2 direction (step (1): drilling forming step). In parallel with this, the rock breaking tool 1A to be inserted into the drilling hole 21 is prepared (preparation step). In this preparatory step, the eyebolt 19 is attached to the rock breaking tool 1A by screwing the male screw of the eyebolt 19 into the female screw provided in the center of the upper surface (main surface on the Z1 direction side) of the movable plate portion 13 . Also, a suspension wire W is attached to the eyebolt 19 .

Then, as indicated by the arrow in FIG. 1(a), the rock breaking tool 1A is inserted into the drilled hole 21 using the hanging wire W, and the base portion 11 of the rock breaking tool 1A is placed on the bottom surface 211 of the drilled hole 21. It is placed and supported by the bottom surface 211 (step (2): rock breaking tool installation step). At this time, the upper and lower ends of the outer peripheral surfaces of the first blade member 15 and the second blade member 16 are in contact with the inner wall of the drilled hole 21, while the central portion provided with the band-shaped groove portion extends from the inner wall of the drilled hole 21. away.

Subsequently, after removing the suspending wire W and the eyebolt 19, the tip portion (not shown) of the breaker 3 is positioned on the movable plate portion 13 of the rock breaking tool 1A as shown in FIG. After that, the breaker 3 is actuated to apply a blow to the movable plate portion 13 to push down the movable plate portion 13 together with the plate-side wedge member 14 in the Z2 direction, as shown in FIG. 4(b). As a result, the wedge-to-wedge distance is shortened, and the first blade member 15 and the second blade member 16 move in the Y1 direction and the Y2 direction, respectively. As a result, as indicated by the white arrows in FIG. 4(b), the upper and lower outer ends of the blade members 15 and 16 come into close contact with the inner wall of the drilled hole 21 and apply a pressing force. That is, the pressing force is applied to the inner wall of the drilled hole 21 in two stages, upper and lower. As a result, the object to be processed 2 is split into pieces, and a crack CR is formed around the drilled hole 21 to be crushed (step (3): crushing step).

After that, the operation of the breaker 3 is stopped and the breaker 3 is separated from the movable plate portion 13 in the Z1 direction. Then, since the pressing force applied to the inner wall of the drilled hole 21 disappears and the periphery of the drilled hole 21 has already been crushed, the rock breaking tool 1A can be integrally recovered from the processing object 2 (step (4): collection step).

As described above, in this embodiment, the rock breaking tool 1A includes the base-side wedge member 12 integrated with the base portion 11 and the plate-side wedge member 12 integrated with the movable plate portion 13, as shown in FIG. 2(b). The wedge member 14 , the first blade member 15 and the second blade member 16 are interconnected by two connecting portions 17 and 18 . Therefore, a plurality of elements constituting the rock breaking tool 1A can be inserted into the drilling hole 21 collectively. In addition, even after breaking the rock, those elements can be recovered collectively.

In addition, since it has the connection structure as described above, the first blade member 15 and the second blade member 15 correspond to the application of the external force toward the bottom surface 211 to the movable plate portion 13 via the connection structure. 16 moves toward and presses against the inner wall of drilled hole 21 . Although the pressing force is relatively small, a larger pressing force also acts on the inner wall of the borehole 21 . That is, as the plate-side wedge member 14 moves toward the bottom surface 211 together with the movable plate portion 13 in response to the application of the external force, the first blade member 15 moves toward the first base-side inclined surface 121 and the first plate side. While sliding along the inclined surface 141, it moves in the first radial direction Y1 to press the inner wall of the drilled hole 21, and the second blade member 16 moves the second base-side inclined surface 122 and the second plate-side inclined surface 142. , and presses the inner wall of the bore 21 in the second radial direction Y2. In this way, the mechanism for moving the blade members 15 and 16 in the radial direction Y by sliding the blade members 15 and 16 along the inclined surface can apply a relatively large force and has excellent breaking strength. ing. As a result, the object 2 to be treated, such as rocks, bedrock, concrete structures, etc., can be split efficiently with a relatively large force.

<Second embodiment>
FIG. 5 is a side view showing a second embodiment of the rock breaking tool according to the present invention. FIG. 6 is a view of the rock breaking tool shown in FIG. 5 viewed from various directions. FIG. 6(a) and 6(b) indicate drilled holes 21. In FIG. The major differences between the rock breaking tool 1B according to the second embodiment and the rock breaking tool 1A according to the first embodiment are as follows.

As shown in FIGS. 6A and 6B, guide grooves 157 and 167 are provided on the inclined surface sides of the blade members 15 and 16 to guide the base-side wedge member 12 and the plate-side wedge member 14 in the Z direction. Guidance is available.

Further, no groove is provided on the opposite side (outer side) of the blade members 15 and 16, and the blade members 15 and 16 are close to each other as shown in FIGS. In this state, the rock breaking tool 1B has an outer diameter D1 on the opening side (Z1 direction side) of the drilled hole 21 and an outer diameter D2 (<D1) on the bottom side (Z2 direction side) of the drilled hole 21. . That is, as shown in FIG. 5, it has a shape that is slightly tapered toward the Z2 direction. Such a configuration can also be applied to the rock breaking tool 1A according to the first embodiment. Conversely, similarly to the rock breaking tool 1A, in the second embodiment, the outer diameter D1 is equal to the outer diameter D2, and a groove may be provided in the central portion of the outer surface.

Further, in the rock breaking tool 1B, as shown in FIGS. 5 and 6, in the X2 direction, instead of two link bars 171 and 172, one link bar 173 constitutes the base side connecting portion 17. . The link bar 173 is composed of a plate member extending in the Y direction, and an engaging pin 174 is projected toward the base-side wedge member 12 from the central portion of the link bar 173 . A long hole 175 is formed from the engaging pin 174 in the first radial direction Y1, and a long hole 176 is formed in the second radial direction Y2. The link bar 173 configured in this manner is formed by inserting a slot 174 into a slot 174 in a state where the tip of the engagement pin 174 is engaged with the groove 125 extending in the Z direction on the side surface of the base-side wedge member 12 on the X2 direction side. It is connected to the blade members 15 and 16 by connecting members 177 and 178 such as bolts via 175 and 176, respectively. The base-side connecting portions 17 configured in this manner are also provided in the X1 direction. It is movably connected to Y.

Such a connecting structure is also provided on the plate side. That is, in the X2 direction, the plate-side connecting portion 18 is configured by one link bar 183 instead of two link bars 181 and 182 . The link bar 183 is composed of a plate member extending in the Y direction, and an engagement pin 184 is projected toward the plate-side wedge member 14 from the central portion of the link bar 183 . A long hole 185 is formed from the engaging pin 184 in the first radial direction Y1, and a long hole 186 is formed in the second radial direction Y2. The link bar 183 configured in this manner is formed by inserting a slot 184 into a slot 184 in a state in which the tip of the engagement pin 184 is engaged with the groove 145 extending in the Z direction on the side surface of the plate-side wedge member 14 on the X2 direction side. It is connected to the blade members 15 and 16 by connecting members 187 and 188 such as bolts via 185 and 186, respectively. The plate-side connecting portions 18 configured in this way are also provided in the X1 direction. It is movably connected to Y.

Other configurations are basically the same as those of the rock breaking tool 1A according to the first embodiment. Therefore, the same reference numerals are assigned to the same configurations, and the description thereof is omitted.

When the rock splitting tool 1B and the breaker 3 configured as described above are used to split and crush the object 2 to be processed, a hole 21 is formed in the object 2 to be processed in the Z2 direction as in the first embodiment ( In parallel with step (1): drilling and forming step), a rock breaking tool 1B to be inserted into the drilling hole 21 is prepared (preparation step). In this preparatory step, the male screw of the eyebolt 19 (see FIG. 2) is screwed into the female screw provided in the central portion of the upper surface (main surface on the Z1 direction side) of the movable plate portion 13, and the eyebolt 19 is screwed to the rock breaking tool 1B. to install. Suspension wires W (see FIG. 2) are attached to the eyebolts 19 in advance.

Then, the rock breaking tool 1B is inserted into the drilled hole 21 using the suspending wire W, and the base portion 11 of the rock breaking tool 1B is placed on the bottom surface 211 (see FIG. 4) of the drilled hole 21 and supported by the bottom surface 211. (Step (2): Rock breaking tool installation step). At this time, since the dimensional relationship of the outer diameter is (D1>D2), the rock breaking tool 1B can be stably inserted into the drilled hole 21. Subsequently, after removing the suspending wire W and the eyebolt 19, the tip of the breaker 3 (see FIG. 1) is positioned on the movable plate portion 13 of the rock breaking tool 1B. After that, the breaker 3 is actuated to apply a blow to the movable plate portion 13 to push down the movable plate portion 13 together with the plate-side wedge member 14 in the Z2 direction. As a result, the wedge-to-wedge distance is shortened, and the first blade member 15 and the second blade member 16 move in the Y1 direction and the Y2 direction, respectively. As a result, the outer surfaces of the blade members 15 and 16 come into close contact with the inner wall of the drilled hole 21 and apply a pressing force. As a result, the object to be processed 2 is split into pieces, and a crack CR (see FIG. 4) is generated around the drilled hole 21, and is crushed (step (3): crushing step). After that, the operation of the breaker 3 is stopped and the breaker 3 is separated from the movable plate portion 13 in the Z1 direction. Then, since the pressing force applied to the inner wall of the drilled hole 21 disappears and the periphery of the drilled hole 21 has already been crushed, the rock breaking tool 1B can be integrally recovered from the processing object 2 (step (4): collection step).

As described above, also in the rock breaking tool 1B according to the second embodiment, the base-side wedge member 12 integrated with the base portion 11, the plate-side wedge member 14 integrated with the movable plate portion 13, and the first blade member 15 and the second blade member 16 are interconnected by two connecting portions 17,18. Therefore, it is possible to collectively insert a plurality of elements constituting the rock breaking tool 1B into the drilling hole 21 . In addition, even after breaking the rock, those elements can be recovered collectively.

Further, since the connecting structure as described above is provided, a large pressing force acts on the inner wall of the drilled hole 21 in response to the external force being applied to the movable plate portion 13 toward the bottom surface 211 . That is, as the plate-side wedge member 14 moves toward the bottom surface 211 together with the movable plate portion 13 in response to the application of the external force, the first blade member 15 moves toward the first base-side inclined surface 121 and the first plate side. While sliding along the inclined surface 141, it moves in the first radial direction Y1 to press the inner wall of the drilled hole 21, and the second blade member 16 moves the second base-side inclined surface 122 and the second plate-side inclined surface 142. , and presses the inner wall of the bore 21 in the second radial direction Y2. In this way, the mechanism for moving the blade members 15 and 16 in the radial direction Y by sliding the blade members 15 and 16 along the inclined surface can apply a relatively large force and has excellent breaking strength. ing. As a result, the object 2 to be treated, such as rocks, bedrock, concrete structures, etc., can be split efficiently with a relatively large force.

<Third Embodiment>
In the first and second embodiments, one rock breaking tool 1A, 1B is inserted into one drilled hole 21 to crush the periphery of the drilled hole 21. multiple rock breaking tools may be inserted. For example, as shown in FIG. 7, two rock breaking tools 1a and 1b having the same configuration as the rock breaking tool 1A shown in FIG. 2 may be inserted into the drilling hole 21 in this order (third embodiment).

FIG. 7 is a diagram schematically showing a third embodiment of the crushing method according to the present invention. In the third embodiment, as shown in the figure, the base portion 11 of the rock breaking tool 1a is placed on the bottom surface 211 of the drilling hole 21, and the base portion of the rock breaking tool 1b is placed on the movable plate portion 13 of the rock breaking tool 1a. 11 is placed. As a result, the rock breaking tool 1a is directly supported by the bottom surface 211 of the drilling hole 21, and receives an external force from the breaker 3 via the rock breaking tool 1b. On the other hand, the rock breaking tool 1b is indirectly supported by the bottom surface 211 of the drilling hole 21 through the rock breaking tool 1a, and the external force from the breaker 3 is directly received by the movable plate portion 13. Further, by arranging the rock breaking tools 1a and 1b so as to intersect each other (for example, orthogonally) in a plan view from the Z1 direction, it is possible to differentiate the direction of rock breaking by the rock breaking tool 1a and the rock breaking direction by the rock breaking tool 1b. Efficiency can be further increased.

In the third embodiment, the rock breaking tools 1a and 1b respectively correspond to examples of the "first rock breaking tool" and the "second rock breaking tool" of the present invention. As for the rock breaking tool 1a, the Y1 direction and the Y2 direction respectively correspond to examples of the "first radial direction" and the "second radial direction" of the present invention. On the other hand, with respect to the rock breaking tool 1b, the X direction, X1 direction and X2 direction respectively correspond to examples of "radial direction", "first radial direction" and "second radial direction" of the present invention.

In the third embodiment, the rock breaking tools 1a and 1b are arranged so as to intersect each other (for example, orthogonally) when viewed from the Z1 direction. They may overlap, that is, they may be arranged so that the split rock directions match.

In the third embodiment, two rock breaking tools 1a and 1b having the same configuration as the rock breaking tool 1A shown in FIG. 2 are used, but two rock breaking tools having the same configuration as the rock breaking tool 1B shown in FIGS. A rock breaking tool may also be used.

<Fourth Embodiment>
In the first to third embodiments, the external force from the breakers 3 of the rock breaking tools 1A, 1B, 1a, and 1b is applied directly to the movable plate portion 13. However, as shown in FIG. The external force may be applied to the movable plate portion 13 via the long shaft body 6 extending in the Z direction (fourth embodiment).

FIG. 8 is a diagram schematically showing a rock breaking tool for executing a fourth embodiment of the crushing method according to the present invention. The major difference between the fourth embodiment and the first embodiment is that the external force from the breaker 3 is applied to the movable plate portion 13 via the long shaft 6, and a pair of The only difference is that the engaging portions 61 and 62 press the periphery of the opening 212 of the drilled hole 21, and the rest of the configuration is basically the same as that of the first embodiment. Therefore, in the following description, the points of difference will be mainly described, and the same or equivalent reference numerals will be given to the same configurations, and the description of the configurations will be omitted.

9 is an enlarged view of the rock breaking tool shown in FIG. 8, and FIG. 9(a) is a side view. 1B is a view taken along the line BB in FIG. 1A, and FIG. 1C is a cross-sectional view taken along the line CC in FIG. 1A. The dashed-dotted line in the drawing indicates drilling. FIG. 10 is a further enlarged view of part of the rock breaking tool used in the fourth embodiment. The rock breaking tool 1C shown in FIG. 9 differs from the rock breaking tool 1A shown in FIG. (corresponding to one example) is finished in a convex shape, and other configurations are basically the same. Therefore, in the following description, the same components are denoted by the same reference numerals, the description thereof is omitted, and the differences are mainly described.

The long shaft body 6 is arranged so that the end face on the Z1 direction side faces the breaker 3 and the end face on the Z2 direction side faces the upper surface 131 of the movable plate portion 13, as shown in FIG. That is, it is arranged between the breaker 3 and the movable plate portion 13 so that the axis of the long shaft body 6 is substantially parallel to the formation direction Z of the drilled hole 21 . Here, when the upper surface 131 of the movable plate portion 13 is finished flat as in the first to third embodiments, it is desirable that both end surfaces of the long shaft body 6 are also finished flat. On the other hand, as described in Japanese Unexamined Patent Application Publication No. 2016-211221, for example, even if the axis of the piston 31 provided in the breaker 3 and the axis of the wedge members 12 and 14 do not match to some extent, the impact force of the breaker 3 can be reduced. In order to ensure the transmission to the wedge members 12 and 14, as shown in FIG. 9, the piston 31, the long shaft body 6 and the movable plate portion 13 may be finished in a curved shape. We are hiring. More specifically, the lower surface 311 of the piston 31 is finished as a curved concave surface recessed in the Z1 direction. Correspondingly, the end face (corresponding to an example of the "second end face" of the present invention) 64 on the Z1 direction side of the long shaft 6 is finished into a curved convex surface protruding in the Z1 direction. Moreover, the lower surface 311 of the piston 31 and the end surface 63 of the long shaft body 6 on the Z1 direction side have the following relationship: (curvature radius of the end surface 311)=(curvature radius of the end surface 63)
have.

An end surface 63 (corresponding to an example of the "first end surface" of the present invention) of the long shaft 6 on the Z2 direction side is finished as a curved concave surface recessed in the Z1 direction. Correspondingly, the upper surface 131 of the movable plate portion 13 is finished into a curved convex surface protruding in the Z1 direction. Moreover, the end surface 64 of the long shaft 6 on the Z2 direction side and the upper surface 131 of the movable plate portion 13 have the following relationship: (curvature radius of the end surface 64)=(curvature radius of the upper surface 131)
have. Of course, it goes without saying that both or one of the above-described concave-convex relationships may be reversed. Also, the impact force of the breaker 3 can be reliably transmitted to the wedge members 12 and 14 .

Further, in the fourth embodiment, the long shaft body 6 has two engaging portions 61 and 62 as shown in FIG. The first engaging portion 61 is provided so as to protrude in the first radial direction Y1 from a region of the side surface 65 of the long shaft body 6 near the second end surface 64 . The first engaging portion 61 has a first inclined surface 612 that can be engaged with the periphery of the opening 212 of the drilled hole 21 at the tip portion 611 projecting in the first radial direction Y1. On the other hand, the second engaging portion 62 is provided so as to protrude in the second radial direction Y2 from a region near the second end face 64 of the long shaft body 6 . The second engaging portion 62 is provided with a second inclined surface 622 that can be engaged with the periphery of the opening 212 of the drilled hole 21 at the tip portion 621 projecting in the second radial direction Y2. The first inclined surface 612 and the second inclined surface 622 are inclined so that the amount of protrusion from the neighboring area increases in the Z1 direction (the direction from the first end surface 63 toward the second end surface 64). It can be engaged with the opening 212 of the drilled hole 21 .

As shown in FIG. 9 , when the long shaft 6 is inserted into the drilled hole 21 into which the components of the rock breaking tool 1</b>C except for the long shaft 6 are inserted, the first end surface 63 becomes the upper surface of the movable plate portion 13 . 131 is in sliding contact. Also, the first inclined surface 612 of the engaging portion 61 and the second inclined surface 622 of the engaging portion 62 are engaged with the processing object 2 around the opening 212 of the drilled hole 21 . When the impact force of the breaker 3 is applied to the long shaft 6 in such a state, the long shaft 6 moves toward the bottom surface 211 together with the movable plate portion 13 and the plate-side wedge member 14 . Along with this, pressing in the radial direction Y is performed by the blade members 15 and 16 in the same manner as in the first embodiment, and at the same time, pressing by the engaging portions 61 and 62 is performed. That is, the engagement position P of the first inclined surface 612 and the second inclined surface 622 that engages with the periphery of the opening 212 of the drilled hole 21 moves toward the second end surface 64, that is, toward the Z1 direction. The engaging portion 61 presses the periphery of the opening 212 of the drilled hole 21 in the first radial direction Y1, and the second engaging portion 62 presses the periphery of the opening 212 of the drilled hole 21 in the second radial direction Y2.

Next, referring to FIG. 11, a description will be given of a method of breaking and crushing the object 2 by using the rock breaking tool 1C and the breaker 3 configured as described above. FIG. 11 is a diagram schematically showing a fourth embodiment of the crushing method according to the present invention. In each column of the figure, the drawing on the left is a schematic diagram of the inside of the drilled hole 21 viewed from the X2 direction, the upper right drawing is a view of the vicinity of the opening 212 of the drilled hole 21 from above, and the lower drawing on the right is It is the figure which looked at the inside of the drilling hole 21 from upper direction. In addition, in the figure, the long shaft 6, the engaging portions 61 and 62, the base portion 11, the base side wedge member 12, the movable plate portion 13, the plate side wedge member 14, the first blade member 15 and the second blade member 16 In order to clarify the moving operation of , the illustration of the configuration (pins and link bars) related to the coupling mechanism is omitted.

In the fourth embodiment, as shown in FIG. 11(a), drilling holes 21 are formed in the processing object 2 in the Z2 direction (step (1): drilling forming step). In parallel with this, a rock breaking tool 1C to be inserted into the drilling hole 21 is prepared (preparation step). In this preparatory step, the bolt 71 provided at the tip of the suspension member 7 (see FIG. 10(b)) is screwed into the female thread provided at the center of the upper surface 131 of the movable plate portion 13, and the rock breaking tool 1C is formed. (However, the long shaft body 6 is excluded) is attached to the suspension member 7 so that it can be suspended.

Then, as shown in FIG. 4A, the component parts of the rock breaking tool 1C excluding the long shaft body 6 (substantially the same integral structure as the rock breaking tool 1A) are attached to the drilling holes 21 by the suspending members 7. The base portion 11 of the rock breaking tool 1</b>C is placed on the bottom surface 211 of the drilled hole 21 and supported by the bottom surface 211 . Subsequently, after removing the suspending member 7 from the movable plate portion 13 , the distal end portion and the central portion of the long shaft 6 are inserted into the drilled hole 21 , and the first end surface 63 is inserted into the upper surface 131 of the movable plate portion 13 . , and lock the first inclined surface 612 of the engaging portion 61 and the second inclined surface 622 of the engaging portion 62 around the opening 212 of the drilled hole 21 (Step (2): Installation of rock breaking tool process).

When the preparation for the crushing process is completed in this way, the piston 31 of the breaker 3 is brought into sliding contact with the second end face 64 of the long shaft body 6 of the rock breaking tool 1C as shown in FIG. After that, the breaker 3 is operated to hit the long shaft 6 as shown in FIG. 11(b). As a result, the long shaft 6 is pushed down in the Z2 direction, and the movable plate portion 13 is pushed down together with the plate-side wedge member 14 in the Z2 direction. Of these, when the long shaft 6 is pushed down, the engaging position P of the first inclined surface 612 and the second inclined surface 622 that engages with the periphery of the opening 212 of the drilled hole 21 is the second end surface 64 side, that is, the Z1 direction side. move to As a result, as indicated by the white arrow AR1 in FIG. 62 presses the circumference of the opening 212 of the drilled hole 21 in the second radial direction Y2. At the same time, by pushing down the movable plate portion 13 and the plate-side wedge member 14 in the Z2 direction, the wedge-to-wedge distance is shortened, and the first blade member 15 and the second blade member 16 move in the Y1 direction and the Y2 direction, respectively. As a result, as indicated by white arrows AR2 in FIG. 11(b), the outer surfaces of the blade members 15 and 16 come into close contact with the inner wall of the drilled hole 21 and apply a pressing force. As a result, the object to be processed 2 is split into rocks, cracks CR are formed around the drilled hole 21, and the rock is crushed (step (3): crushing step).

After that, the operation of the breaker 3 is stopped and the breaker 3 is separated from the movable plate portion 13 in the Z1 direction. Then, the pressing force applied to the inner wall of the drilled hole 21 disappears, and the periphery of the drilled hole 21 has already been crushed. It can be integrally recovered from the processing object 2 (step (4): recovery step).

As described above, in this embodiment, the rock breaking tool 1C has the long shaft body 6 and the integral structure other than the long shaft body 6. The integral structure other than the long shaft body 6 is It is substantially the same as the rock breaking tool 1A, and a plurality of elements forming an integral structure can be inserted into the drilling hole 21 at once. In addition, even after breaking the rock, those elements can be recovered collectively. In addition, as shown in FIG. 11, the long shaft body 6 is used in a state where the end on the Z2 direction side is always exposed from the drilled hole 21. Easy. Therefore, effects similar to those of the first to third embodiments can be obtained.

Further, in the fourth embodiment, the vicinity of the bottom surface of the drilled hole 21 and the vicinity of the opening 212 can be crushed at the same time, and the efficiency of the crushing process can be improved.

<Fifth Embodiment>
In the fourth embodiment, the above steps (2) to (4) are continuously performed for one drilled hole 21, but a plurality of drilled holes 21 are formed in advance in a row, and these steps are performed. You may perform a crushing process continuously by performing all or one part of in parallel (5th Embodiment).

FIG. 12 is a diagram schematically showing a fifth embodiment of the crushing method according to the present invention. In the fifth embodiment, a plurality of holes 21 are formed as shown in FIG. 1(a), and three sets of rock breaking tools 1C may be prepared, and the following steps may be performed.

・Insert the rock breaking tool 1C into each of the drilled holes 21a to 21c ((b) in the figure),
・The second end surface 64 of the long shaft 6 is struck by the piston 31 (see FIG. 8) of the breaker 3 to push down the long shaft 6 and the movable plate portion 13 to crush the periphery of the drilled hole 21a (see FIG. 8). c)),
- The rock breaking tool 1C is recovered from the drilling hole 21a, and the recovered rock breaking tool 1C is inserted into another drilling hole (not shown) following the drilling hole 21c.
By performing these processes in parallel, the efficiency of the crushing process can be further improved.

The present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the above-described fourth and fifth embodiments, the rock breaking tool 1A is combined with the long shaft 6 to perform the crushing process using the rock breaking tool 1C. The crushing process may be performed using a rock breaking tool 1D in which a long shaft body 6 is combined with 1B (sixth embodiment). Also, a plurality of rock breaking tools 1A and 1B may be combined with one long shaft body 6 as shown in the third embodiment.

In the above-described embodiment, the breaker 3 is used as means for applying an external force to the movable plate portion 13 and the long shaft body 6 toward the base portion 11. It may be configured to provide and perform rock breaking processing.

Further, in the above-described first embodiment, band-shaped grooves are provided throughout the central portions of the outer surfaces of the blade members 15 and 16, but a plurality of grooves may be provided. Further, providing a groove is not an essential requirement, and the blade members 15 and 16 having no groove may be used, and similarly to the second embodiment, it may be finished in a shape that tapers in the Z2 direction. good. Conversely, only the center portions of the outer surfaces of the blade members 15 and 16 may be bulged outward so that only the center portions press the inner wall of the drilled hole 21 .

INDUSTRIAL APPLICABILITY The present invention can be applied to general rock breaking tools for breaking objects such as rocks, rocks and concrete structures, and to general crushing techniques for crushing objects using such tools.

1A to 1D rock breaking tool 1a (first) rock breaking tool 1b (second) rock breaking tool 2 object to be processed 6 long shaft body 11 base portion 12 base side wedge member 13 movable plate portion 14 plate Side wedge member 15 First blade member 16 Second blade member 17 Base side connecting portion 18 Plate side connecting portion 21 Drilling hole 61 First engaging portion 62 Second engaging portion 63 (second ) end surface 64 (first) end surface 65 side surface 121 first base side inclined surface 122 second base side inclined surface 131 upper surface (facing surface of movable plate portion)
141 First plate side inclined surface 142 Second plate side inclined surface 151, 152 (first blade member) inclined surface 161, 162 (second blade member) inclined surface 211 (drilled hole 21) Bottom surface 212... Opening (of drilled hole 21) 611, 621... Tip portion 612... First inclined surface 622... Second inclined surface P... Engagement position X1, Y1... First radial direction X2, Y2... Second radial direction Y …Radial direction Z…Depth direction

Claims (9)

a base portion supported by the bottom surface of the drilled hole formed in the processing object;
a base-side wedge member projecting sagittally from the base portion toward the opening of the drilled hole;
a movable plate portion provided movably along the depth direction of the drilled hole on the opening side of the drilled hole;
a plate-side wedge member projecting sagittally from the movable plate portion toward the bottom surface of the drilled hole;
a first base-side inclined surface provided on the first radial side surface of the base-side wedge member in the radial direction of the drilled hole inside the drilled hole; and the first radial side surface of the plate-side wedge member. a first blade member disposed slidably with respect to the first base-side inclined surface and the first plate-side inclined surface between the first plate-side inclined surface provided in the
a second base-side inclined surface provided on the second radial side surface of the base-side wedge member in the radial direction of the drilled hole inside the drilled hole; and the second radial side surface of the plate-side wedge member. a second blade member disposed slidably with respect to the second base-side inclined surface and the second plate-side inclined surface between the second plate-side inclined surface provided in the
a base-side connecting portion that connects the first blade member and the second blade member to the base-side wedge member so as to be movable in the radial direction of the drilled hole;
a plate-side connecting portion that connects the first blade member and the second blade member to the plate-side wedge member so as to be movable in the radial direction of the drilled hole;
As the plate-side wedge member moves toward the bottom surface together with the movable plate portion when an external force is applied to the movable plate portion toward the bottom surface, the first blade member moves toward the bottom surface. While sliding along the first base-side inclined surface and the first plate-side inclined surface, it moves in the first radial direction to press the inner wall of the drilled hole, and the second blade member moves to the second base side. A rock breaking tool that presses against the inner wall of the drilled hole by moving in the second radial direction while sliding along the inclined surface and the second plate-side inclined surface. A rock breaking tool according to claim 1,
Further comprising a long shaft body extending along the drilled hole on the opening side of the drilled hole with respect to the movable plate portion,
A first end surface of both end surfaces of the long shaft that faces the movable plate portion abuts the movable plate portion, while a second end surface on the opposite side of the first end surface receives the external force. A rock breaking tool in which a shaft body transmits the external force to the movable plate portion. A rock breaking tool according to claim 2,
One of the facing surface of the movable plate portion facing the first end surface of the long shaft and the first end surface of the long shaft is finished to be concave and the other is finished to be convex so as to be in sliding contact with each other. Breaking rock tools. The rock breaking tool according to claim 2 or 3,
It is provided so as to protrude in the first radial direction from a region near the second end face of the side surface of the long shaft body, and a tip portion protruding in the first radial direction can be engaged with the circumference of the opening of the drilled hole. a first engaging portion provided with a first inclined surface;
It is provided so as to protrude in the second radial direction from a region near the second end face of the side surface of the long shaft body, and the tip portion protruding in the second radial direction can be engaged with the circumference of the opening of the drilled hole. a second engaging portion provided with a second inclined surface,
The first slanted surface and the second slanted surface are slanted such that the amount of protrusion from the neighboring region increases in the direction from the first end surface toward the second end surface, and
As the long shaft body moves toward the bottom surface together with the movable plate portion and the plate-side wedge member due to the application of the external force, one of the first inclined surface and the second inclined surface moves toward the drilled hole. By moving the position that engages with the periphery of the opening to the second end surface side, the first engaging portion presses the periphery of the opening of the drilled hole in the first radial direction, and the second engagement a rock breaking tool having a portion pressing the circumference of the opening of the drilling hole in the second radial direction; a step of inserting the rock breaking tool according to claim 1 into the drilling hole with the first blade member and the second blade member close to each other and placing the base portion on the bottom surface;
By applying an external force toward the bottom surface to the movable plate portion of the rock breaking tool inserted into the drilled hole, the distance between the movable plate portion and the base portion is shortened inside the drilled hole, and and a step of crushing the periphery of the drilled hole by pressing the first blade member and the second blade member against the inner wall of the drilled hole according to the shortening of the distance. A first rock breaking tool having the same configuration as the rock breaking tool according to claim 1 is inserted into the drilling hole with the first blade member and the second blade member close to each other, and the base of the first rock breaking tool is inserted into the drilling hole. placing a part on the bottom surface;
After inserting the first rock breaking tool into the drilling hole, a second rock breaking tool having the same configuration as the rock breaking tool according to claim 1 is placed so that the first blade member and the second blade member are close to each other. placing the base portion of the second rock breaking tool on the movable plate portion of the first rock breaking tool;
By applying an external force directed toward the bottom surface to the movable plate portion of the second rock breaking tool inserted into the drilling hole, each of the first rock breaking tool and the second rock breaking tool is moved inside the drilling hole. The distance between the movable plate portion and the base portion is shortened, and according to the shortening of the distance, the first blade member and the second blade member are pressed against the inner wall of the drilled hole to move the periphery of the drilled hole. A crushing method characterized by comprising a step of crushing. The crushing method according to claim 6,
The direction of movement of the first blade member and the second blade member in the second rock breaking tool is different from the direction of movement of the first blade member and the second blade member in the first rock breaking tool. A crushing method of placing a second rock splitting tool on the movable plate portion of the first rock splitting tool. A crushing method for crushing the periphery of the drilled hole using the rock breaking tool according to claim 2 or 3,
The base portion, the base-side wedge member, the movable plate portion, the plate-side wedge member, the first blade member, and the second blade while the first blade member and the second blade member are adjacent to each other. a step of integrally inserting the member, the base-side connecting portion, and the plate-side connecting portion into the drilled hole and placing the base portion on the bottom surface;
a step of inserting the long shaft toward the movable plate portion inserted into the drilled hole to bring the first end face of the long shaft into contact with the movable plate portion;
By applying the external force to the second end surface of the long shaft while the first end surface of the long shaft is in contact with the movable plate portion, the movable plate portion and the base are separated from each other inside the drilled hole. a step of shortening the distance from the part and crushing the periphery of the drilled hole by pressing the first blade member and the second blade member against the inner wall of the drilled hole according to the shortening of the distance. A crushing method characterized by A crushing method for crushing the periphery of the drilled hole using the rock breaking tool according to claim 4,
The base portion, the base-side wedge member, the movable plate portion, the plate-side wedge member, the first blade member, and the second blade while the first blade member and the second blade member are adjacent to each other. a step of integrally inserting the member, the base-side connecting portion, and the plate-side connecting portion into the drilled hole and placing the base portion on the bottom surface;
The long shaft body is inserted toward the movable plate portion inserted into the drilled hole to bring the first end face of the long shaft body into contact with the movable plate portion, and the first engaging portion of the first engaging portion a step of bringing the inclined surface and the second inclined surface of the second engaging portion into contact with the circumference of the opening of the drilled hole;
The first end surface of the long shaft is brought into contact with the movable plate portion, and the first inclined surface of the first engaging portion and the second inclined surface of the second engaging portion are arranged around the opening of the drilled hole. By applying the external force to the second end surface of the long shaft body while they are in contact with each other, the distance between the movable plate portion and the base portion is shortened inside the drilled hole, thereby shortening the distance. Accordingly, the first blade member and the second blade member press the inner wall of the drilled hole, and the first engaging portion and the second engaging portion press the periphery of the opening of the drilled hole, thereby and fracturing the periphery of the drilled hole.

Images