Rock breaking tool and rock breaking method using tool

Abstract

To provide a rock breaking tool capable of breaking up objects to be treated, such as rocks, bedrock, and concrete structures, with excellent efficiency, and a rock breaking method capable of efficiently breaking up objects to be treated using the tool.SOLUTION: In this invention, as an upper wedge member moves along the depth direction of a drilled hole with a first inclined portion and a second inclined portion in sliding contact with each other, a lower wedge member and a first blade member move together in a direction perpendicular to the depth direction while the first blade member is pressed against the lower wedge member, and the first blade member presses against an inner wall of the drilled hole to break the rock around the drilled hole. Therefore, the rock breaking process begins with the first blade member and the second blade member pressed against the first inclined portion and the second inclined portion, respectively. In other words, a large force acts on the broken rock from the initial stage of the rock breaking process, and the processing object can be efficiently broken down.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a rock-breaking tool for breaking up objects to be treated, such as bedrock, boulders, and concrete structures, and to a crushing technique for crushing the objects to be treated using the tool. [Background technology]

[0002] Conventionally, a so-called seri-ya, which uses a wedge member (sometimes called a wedge) and a blade member (sometimes called a liner), has been known as a rock-breaking tool for breaking up objects to be processed, such as rocks, bedrock, and concrete structures. For example, Patent Document 1 describes a technique for breaking up objects to be processed using a rock-breaking tool that combines a wedge member and a blade member. More specifically, a hole is drilled in advance in the bedrock using a rock drill, a rock-breaking tool that combines a wedge member and a blade member is inserted into the hole, and the rear end of the wedge member is struck with a breaker to break up the rock and crush the bedrock.

[0003] In the rock breaking tool, 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 the rock is broken can be assisted by the use of a work machine. However, there are many manual tasks involved in the breaking work using the rock breaking tool. For example, it was 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. In addition, after the breaking is completed and the wedge member is pulled out from the blade member, the positions of the blade members separated from each other in the breaking area are confirmed and each is recovered individually, which also requires manual labor. Such manual work must be performed for each broken rock, which was one of the main factors that reduced the efficiency of the breaking process using the rock breaking tool.

[0004] Therefore, the applicant of the present application created a rock breaking tool in which a first blade member and a second blade member are connected to a base side wedge member by a base side connecting part so as to be freely movable in the radial direction of the hole drilled, and the first blade member and the second blade member are connected to a plate side wedge member by a plate side connecting part so as to be freely movable in the radial direction of the hole drilled (see Patent Document 2). In this rock breaking tool, as the plate side wedge member moves toward the bottom surface together with the movable plate part in response to the application of an external force, the first blade member moves in the first radial direction while sliding along the first base side inclined surface and the first plate side inclined surface to press against the inner wall of the hole drilled, and the second blade member moves in the second radial direction while sliding along the second base side inclined surface and the second plate side inclined surface to press against the inner wall of the hole drilled. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-225925 A (Fig. 3) [Patent Document 2] Patent No. 6963718 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the rock breaking tool described in Patent Document 2, in the initial stage of the rock breaking process, that is, when the movable plate part and the plate side wedge member start to move in response to the application of an external force, the area of ​​each blade member sliding against the base side inclined surface and the plate side inclined surface is small, and as the rock breaking process progresses, the sliding area gradually increases, and the rock breaking process progresses. Therefore, there is room for improvement in terms of making the rock breaking process more efficient.

[0007] This invention has been made in consideration of the above-mentioned problems, and aims to provide a rock-breaking tool capable of breaking up processing objects such as rocks, bedrock, and concrete structures with excellent efficiency, and a crushing method using said tool to efficiently break up processing objects. [Means for solving the problem]

[0008] A first aspect of the present invention is a rock-breaking tool comprising: a lower wedge member having a first inclined portion tapered toward the opening of a hole formed in an object to be processed and arranged so as to be insertable into the hole; an upper wedge member having a second inclined portion tapered toward the bottom of the hole and arranged so as to be movable along the depth direction of the hole with the second inclined portion in sliding contact with the first inclined portion of the lower wedge member inserted into the hole; and a sliding contact area in which the first inclined portion and the second inclined portion slide against each other in a direction perpendicular to the depth direction, sandwiched within the hole; The wedge member has a first blade member and a second blade member that are fitted into the bottom surface of the lower wedge member, and a connecting mechanism that connects the first blade member and the second blade member to each other while applying a biasing force to press the first blade member and the second blade member against the first inclined portion and the second inclined portion, respectively.As an external force is applied to the upper wedge member toward the bottom surface, the upper wedge member slides toward the bottom surface, and the lower wedge member and the first blade member move together in a perpendicular direction within the hole while resisting the biasing force, causing the first blade member to press against the inner wall of the hole.

[0009] In addition, a second aspect of the present invention is a crushing method comprising the steps of: inserting a rock-breaking tool into a drilled hole and placing the lower wedge member on the bottom surface of the drilled hole while pressing the first and second blade members against the first and second inclined portions, respectively, using a connecting mechanism, so that the first and second inclined portions are in sliding contact with each other; and applying an external force toward the bottom surface to the upper wedge member of the rock-breaking tool inserted into the drilled hole, thereby moving the lower wedge member and the first blade member together in a perpendicular direction within the drilled hole against the biasing force, thereby pressing the inner wall of the drilled hole with the first blade member to crush the area around the drilled hole.

[0010] Furthermore, a third aspect of the present invention is a crushing method, comprising the steps of: inserting a first rock-breaking tool having the same configuration as the rock-breaking tool described above into a drilled hole while pressing the first and second blade members against the first and second inclined portions, respectively, by a connecting mechanism, so that the first and second inclined portions are in sliding contact with each other, and placing a lower wedge member on the bottom surface of the drilled hole; and, following the insertion of the first rock-breaking tool into the drilled hole, inserting a second rock-breaking tool having the same configuration as the rock-breaking tool described in claim 1 into the drilled hole while pressing the first and second blade members against the first and second inclined portions, respectively, by a connecting mechanism. and inserting the second rock breaking tool into the hole and placing the lower wedge member of the second rock breaking tool on the upper wedge member of the first rock breaking tool while pressing the first inclined portion and the second inclined portion against each other, and applying an external force toward the bottom surface to the upper wedge member of the second rock breaking tool inserted into the hole, thereby moving the lower wedge member and the first blade member together in a perpendicular direction inside the hole while resisting the biasing force of each of the first rock breaking tool and the second rock breaking tool inside the hole, thereby pressing the inner wall of the hole with the first blade member to fracture the periphery of the hole. Effect of the Invention

[0011] As described above, according to the present invention, as the upper wedge member moves along the depth direction of the drilled hole with the first inclined portion and the second inclined portion in sliding contact with each other, the lower wedge member and the first blade member move together in a direction perpendicular to the depth direction while the first blade member is pressed against the lower wedge member, and the first blade member presses the inner wall of the drilled hole to break the rock around the drilled hole. Therefore, the rock breaking process is started with the first blade member and the second blade member pressed against the first inclined portion and the second inclined portion, respectively. In other words, a large force acts on the broken rock from the initial stage of the rock breaking process, and the processing object can be efficiently crushed. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a diagram showing a rock breaking tool and a breaker used when carrying out a first embodiment of the breaking method according to the present invention. [Diagram 2]2 is a diagram showing the configuration and basic operation of the rock breaking tool shown in FIG. 1. [Diagram 3] FIG. 13 is an exploded view for explaining the connection of the blade members by the connecting mechanism. [Figure 4] FIG. 13 illustrates a linkage mechanism and blade members interconnected by the linkage mechanism. [Diagram 5] FIG. 1 is a diagram showing a schematic diagram of a first embodiment of a crushing method according to the present invention. [Figure 6] FIG. 4 is a diagram showing a second embodiment of the rock breaking tool according to the present invention. [Figure 7] 13A to 13C are diagrams showing the configuration of a connecting mechanism in a third embodiment of the rock breaking tool according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The first embodiment of the crushing method according to the present invention includes the following steps (1) to (4): Step (1): A hole is formed near the free surface of a processing object such as a rock, bedrock, or concrete structure. Step (2): Inserting the rock splitting tool according to the present invention into a drilling hole; Step (3): The upper wedge member of the rock breaking tool is struck by the piston of the breaker to press it toward the bottom of the drilled hole, thereby breaking the rock around the drilled hole, especially the area from the drilled hole toward the free surface (rock breaking area). Step (4): After removing the breaker and retrieving the rock breaking tool, the rock breaking area and the upper area above it are excavated and removed with a ripper (ripping and removal); The rock is broken by performing the above steps, and the area from the drilled hole to the free surface side is crushed. In particular, to increase the crushing efficiency, a rock breaking tool, which will be described below, is used. Note that, although the case of crushing the vicinity of the free surface of the object to be treated is described here as an example, other objects to be treated can also be crushed in the same way.

[0014] FIG. 1 is a diagram showing a rock breaking tool and a breaker used when carrying out 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. FIG. 2 is a diagram showing the configuration and basic operation of the rock breaking tool shown in FIG. 1. In order to unify the directions in each diagram, XYZ orthogonal coordinate axes are set. Here, the axial direction of the Z axis represents the depth direction in which the drilled hole 21 is formed in the processing object 2, and the bottom surface 211 of the drilled hole 21 is located in the (Z2) direction, while the opening 212 of the drilled hole 21 is located in the (Z1) direction. In addition, 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 toward the free surface 22 of the processing object 2 corresponds to the first radial direction, and Y2 corresponds to the second radial direction. In other words, the Y direction corresponds to an example of the "orthogonal direction" of the present invention. Furthermore, the axis perpendicular to both the Z axis and the Y axis is the X axis, one of which is the X1 direction, and the other is the X2 direction.

[0015] As shown in FIG. 2, the rock breaking tool 1 has a lower wedge member 11, an upper wedge member 12, a first blade member 13, a second blade member 14, and a connecting mechanism (reference numeral 15 in FIGS. 3 and 4).

[0016] The lower wedge member 11 has a base portion 111, a first inclined portion 112, and a top portion 113. The base portion 111 is finished in a substantially disk shape having an outer diameter smaller than the inner diameter of the hole 21, and can be placed on the bottom surface 211 of the hole 21. A step is provided on the (Z1) surface of the base portion 111, and the (Z2) end portion (base portion 121 to be described later) of the upper wedge member 12 can be engaged on the surface that is lowered by one step. In addition, the first inclined portion 112 extends in the (Z1) direction from the surface that is raised by one step on the (Z1) surface. The first inclined portion 112 is finished in a tapered shape toward the opening 212 (FIG. 1) of the hole 21, as shown in FIG. 2. More specifically, the side surface of the first inclined portion 112 on the (Y1) direction side is a vertical surface parallel to the depth direction Z, while the side surface on the (Y2) direction side is finished into an inclined surface 112a, and the thickness in the radial direction Y becomes thinner as it proceeds toward the opening 212 of the drilled hole 21.

[0017] Furthermore, a top portion 113 is provided at the end of the first inclined portion 112 on the (Z1) direction side. The top portion 113 is provided adjacent to the first inclined portion 112 in the (Y1) direction, and corresponds to an example of a "first regulating portion" of the present invention. In this embodiment, the base portion 111, the first inclined portion 112, and the top portion 113 are formed by cutting out a cylindrical metal material, but the manufacturing method of the lower wedge member 11 is not limited to this. For example, the base portion 111, the first inclined portion 112, and the top portion 113 may be prepared separately and connected by welding or the like to manufacture the lower wedge member 11. This point is also the same for the upper wedge member 12 described next.

[0018] The upper wedge member 12 has a base portion 121, a second inclined portion 122, and a top portion 123. The top portion 123 has an outer shape that is approximately helmet-shaped, and its (Z1) surface is finished into a convex spherical surface. A screw hole 123a is provided in the (Z2) direction from the center of the upper surface of the top portion 123. A female screw is threaded into this screw hole 123a, and an eyebolt for hoisting the rock breaking tool 1 can be attached and detached to the female screw. Therefore, with an eyebolt attached to the rock breaking tool 1 and a wire hung on the eyebolt, the rock breaking tool 1 can be inserted into and pulled up from the drilling hole 21 by heavy machinery such as a crane. A screw hole is also provided on the end face of the (Z1) direction side of the long shaft body described later, allowing the long shaft body to be inserted and detached from the drilling hole 21.

[0019] The (Z2) surface of the top portion 123 is configured to be able to engage with the top portion 113 of the lower wedge member 11. A second inclined portion 122 extends from the (Z2) surface in the (Z2) direction. As shown in FIG. 2, the second inclined portion 122 is tapered toward the bottom surface 211 of the hole 21. More specifically, the side surface of the second inclined portion 122 on the (Y2) direction side is a vertical surface parallel to the depth direction Z, while the side surface on the (Y1) direction side is finished into an inclined surface 122a, and the thickness in the radial direction Y becomes thinner as it approaches the bottom surface 211 of the hole 21. Furthermore, a base portion 121 is provided at the end of the second inclined portion 122 on the (Z2) direction side. The base portion 121 is provided adjacent to the second inclined portion 122 in the (Y2) direction, and corresponds to an example of the "second restricting portion" of the present invention.

[0020] The lower wedge member 11 and the upper wedge member 12 are in close contact with each other such that the inclined surface 112a of the first inclined portion 112 and the inclined surface 122a of the second inclined portion 122 are in sliding contact with each other, and the second inclined portion 122 can slide in the Z direction relative to the first inclined portion 112. Note that, as shown in Fig. 2, the region where the inclined surface of the inclined portion 112 and the inclined surface of the second inclined portion 122 are in sliding contact with each other is referred to as a "sliding contact region SR" in this specification.

[0021] The first blade member 13 and the second blade member 14 are arranged to sandwich this sliding contact area SR within the drilled hole 21. More specifically, as shown in FIG. 2, the first blade member 13 and the second blade member 14 can abut against the first inclined portion 112 and the second inclined portion 122, respectively. Although not shown in FIG. 2, the first blade member 13 and the second blade member 14 are connected to each other by a connecting mechanism 15 (FIGS. 3 and 4) described in detail below, and the first blade member 13 and the second blade member 14 are pressed against the first inclined portion 112 and the second inclined portion 122, respectively. Note that the sliding contact area SR increases with the amount of pressing in of the upper wedge member 12, but the first blade member 13 and the second blade member 14 are always located within the range of the sliding contact area SR. Therefore, the force in the Y direction generated by the sliding of the second inclined portion 122 relative to the first inclined portion 112, that is, the force moving the first blade member 13 and the second blade member in the Y1 direction and the Y2 direction, respectively, acts on the entire first blade member 13 and second blade member 14.

[0022] FIG. 3 is an exploded view for explaining the connection of the blade members by the connecting mechanism, and FIG. 4 is a view showing the connecting mechanism and the blade members connected to each other by the connecting mechanism. The connecting mechanism 15 is composed of a plurality of spring members 151 and a plurality of nuts 152. Each spring member 151 is configured to generate a biasing force acting in a direction to bring the first blade member 13 and the second blade member 14 closer to each other. Each spring member 151 has a coil portion that generates the biasing force, a spring end 151a extending from the coil portion in the (Y1) direction, and a spring end 151b extending from the coil portion in the (Y2) direction. These spring ends 151a and 151b are provided with male threads that can be screwed into the nuts 152. 4, the coil portion is accommodated in a spring space formed by a spring accommodating space 131 provided inside the first blade member 13 and a spring accommodating space 141 provided inside the second blade member 14. The spring end 151a is connected to the nut 152 in a state where it has entered into the notch 132 of the first blade member 13 through a through hole communicating with the spring accommodating space 131 in the first blade member 13. The spring end 151b is connected to the nut 152 in a state where it has entered into the notch 142 of the second blade member 14 through a through hole communicating with the spring accommodating space 141 in the second blade member 14. In this way, the first blade member 13 and the second blade member 14 are connected by the connecting mechanism 15 in a state where they are pressed against the first inclined portion 112 and the second inclined portion 122, respectively. As a result, the lower wedge member 11, the upper wedge member 12, the first blade member 13 and the second blade member 14 are integrated by the connecting mechanism 15 and function as an example of the rock breaking tool 1 of the present invention.

[0023] Next, a method for breaking and crushing the processing target 2 using the rock breaking tool 1 and breaker 3 configured as described above will be described with reference to Fig. 5. Fig. 5 is a schematic diagram showing a first embodiment of the crushing method according to the present invention. In this figure, the configuration related to the connecting mechanism is omitted in order to clarify the movement operations of the lower wedge member 11, the upper wedge member 12, the first blade member 13, and the second blade member 14.

[0024] In this embodiment, as shown in FIG. 5(a), a drill hole 21 is formed in the processing object 2 in the (Z2) direction (step (1): drill hole forming step). In parallel with this, the rock breaking tool 1 to be inserted into the drill hole 21 is prepared (preparation step). In this preparation step, the upper wedge member 12 is pulled upward so that the top part 113 and the base part 121 are engaged with the first blade member 13 and the second blade member 14, respectively, and the rock breaking tool 1 is adjusted to a position suitable for insertion and removal into the drill hole 21 (state before pushing in). Then, the male thread of the eye bolt is screwed into the screw hole 123a of the top part 123, and the eye bolt is attached to the rock breaking tool 1. In addition, a suspension wire is attached to the eye bolt.

[0025] Then, as shown in Fig. 1(a), the rock breaking tool 1 is inserted into the drilling hole 21 using the suspension wire in the state before being pushed in, and the base part 111 of the rock breaking tool 1 is placed on the bottom surface 211 of the drilling hole 21 and supported by the bottom surface 211 (step (2): rock breaking tool installation step). At this time, the first blade member 13 and the second blade member 14 enter the drilling hole 21.

[0026] Subsequently, after removing the suspension wire and the eyebolt, the piston 31 of the breaker 3 is positioned at the top portion 123 of the upper wedge member 12 as shown in FIG. 1. Then, the breaker 3 is operated to strike the upper wedge member 12 as shown in FIG. 5(b), and the upper wedge member 12 is pushed down in the (Z2) direction while sliding against the lower wedge member 11. At this time, the first blade member 13 moves in the (Y1) direction while resisting the biasing force of the spring member 151 of the connecting mechanism 15, and moves in the (Z1) direction together with the second blade member 14. As a result, the first blade member 13 comes into close contact with the inner wall of the drilled hole 21 as shown by the white arrow in FIG. 5(b). At this time, the upper wedge member 12 and the second blade member 14 also move in the (Y2) direction together and come into close contact with the inner wall of the drilled hole 21. In this way, with the first blade member 13 and the second blade member 14 in close contact with the inner wall of the drilled hole 21, a pressing force is applied from the first blade member 13 toward the free surface 22. As a result, the rock-breaking region 23, which has advanced in the (Z1) direction from the opening 212 of the drilled hole 21, is cracked from the drilled hole 21 toward the free surface 22, and is crushed (step (3): crushing step). At this time, no cracks have been generated in the upper region 24, which is located on the (Z1) direction side of the rock-breaking region 23, and it is in the same state as before the crushing step.

[0027] Next, the operation of the breaker 3 is stopped, and the breaker 3 is moved away from the upper wedge member 12 in the (Z1) direction. Then, the first blade member 13 receives a force in the (Y2) direction away from the inner wall surface of the drilling hole 21 due to the biasing force. In this state, the male thread of the eyebolt is screwed into the screw hole 123a of the top part 123, the eyebolt is attached to the rock breaking tool 1, and a hanging wire is attached to the eyebolt. After that, the upper wedge member 12 is lifted by a crane or the like, and the rock breaking tool 1 can be retrieved from the drilling hole 21 by the reverse operation of the insertion of the rock breaking tool 1 (step (4): retrieval step). When the rock breaking tool 1 is removed in this way, the upper area (non-rock breaking area) 24 is placed on the rock breaking area 23 in the processing object 2, as shown in FIG. (c).

[0028] After that, the rock-broken area 23 is removed by a heavy construction machine equipped with a ripping attachment. At this time, the upper area (non-rock-broken area) 24 is also removed at the same time due to the principle of a falling doll, and as shown in FIG. 1(d), a relatively large area (=rock-broken area 23 + upper area 24) located on the free surface 22 side of the drilled hole 21 is ripped and removed from the treatment object 2.

[0029] As described above, in this embodiment, in the rock breaking tool 1, as the upper wedge member 12 moves along the depth direction Z2 of the drilled hole 21 with the first inclined portion 112 and the second inclined portion 122 in sliding contact with each other, the lower wedge member 11 and the first blade member 13 move together in the direction Y1 perpendicular to the depth direction Z2 while the first blade member 13 is pressed against the lower wedge member 11, and the first blade member 13 presses against the inner wall of the drilled hole 21 to break the rock around the drilled hole 21. Therefore, a large force is contributed to the rock breaking from the early stage of the rock breaking process, and the processing target 2 can be efficiently crushed.

[0030] <Second embodiment> FIG. 6 is a diagram showing a second embodiment of the rock breaking tool according to the present invention. The major difference between the second embodiment and the first embodiment is that the tool further includes a long shaft body 16 extending along the drilled hole 21, and is capable of breaking rock at a deeper position than in the first embodiment. In the second embodiment, as shown in FIG. 6(a), the first blade member 13 and the second blade member 14 are inserted into the drilled hole 21 as a whole while being pressed against the first inclined portion 112 and the second inclined portion 122, respectively, by the connecting mechanism 15. Then, after removing the eyebolt from the top portion 123 of the upper wedge member 12, the (Z2) side end of the long shaft body 16 is inserted into the drilled hole 21 using the eyebolt and the hanging wire in the same manner as in the first embodiment. As a result, the (Z2) side end face 161 of the long shaft body 16 is abutted against the top portion 123 of the upper wedge member 12. The (Z2) direction end of the long shaft body 16 extends upward beyond the opening 212 of the drilled hole 21. Further, on the (Z2) direction side of the long shaft body 16, the upper wedge member 12 is in the pre-pushing state as in FIG. 2(a).

[0031] Subsequently, after removing the suspension wire and the eyebolt, the piston 31 of the breaker 3 is positioned on the (Z1) direction end face 162 of the long shaft body 16. More specifically, as shown in FIG. 6(a), the long shaft body 16 is disposed so that the (Z1) direction end face 162 faces the piston 31 of the breaker 3 (see FIG. 1) and the (Z2) direction end face 161 faces the top part 123 of the upper wedge member 12. In other words, the long shaft body 16 is disposed between the breaker 3 and the upper wedge member 12 so that the axis of the long shaft body 16 is approximately parallel to the formation direction Z of the drilling hole 21. Here, when the (Z1) surface of the top part 123 of the upper wedge member 12 is finished flat, it is desirable to finish both end faces of the long shaft body 16 flat as well. On the other hand, as described in JP 2016-212221 A, for example, in order to reliably transmit the impact force of the breaker 3 to the upper wedge member 12 even if the axis of the piston 31 provided in the breaker 3 and the axis of the upper wedge member 12 are slightly misaligned, the piston, the long shaft 16, and the top portion 123 may be finished in a curved shape as shown in Fig. 6, and this configuration is adopted in the second embodiment. In this respect, it is similar to the device described in Patent Document 2.

[0032] After that, the breaker 3 is operated to strike the upper wedge member 12 via the (Z2) end face 161 of the long shaft body 16 as shown in FIG. 6(b), and the upper wedge member 12 is pushed down in the (Z2) direction while sliding against the lower wedge member 11. At this time, the first blade member 13 moves in the (Y1) direction while moving together with the second blade member 14 in the (Z1) direction against the biasing force of the spring member 151 of the connecting mechanism 15. At this time, the upper wedge member 12 and the second blade member 14 also move together in the (Y2) direction and come into close contact with the inner wall of the drilled hole 21. In this way, with the first blade member 13 and the second blade member 14 in close contact with the inner wall of the drilled hole 21, a pressing force is applied from the first blade member 13 toward the free surface 22. As a result, as shown by the white arrow in Fig. 6(b), the first blade member 13 applies a pressing force in close contact with the inner wall of the drilled hole 21. This causes cracks to appear from the drilled hole 21 toward the free surface 22 in the rock-breaking region 25, which is located deeper than in the first embodiment, and the rock is crushed.

[0033] Thus, in the second embodiment, the (Z2) direction end face 161 and the (Z1) direction end face 162 of the longitudinal body 16 function as the "first end face" and "second end face" of the present invention, respectively, and rock breaking processing can be performed at a deeper position than in the first embodiment.

[0034] In the first and second embodiments, one rock breaking tool 1 is used for one drill hole 21 to perform rock breaking. However, as described in Patent Document 2, multiple rock breaking tools 1 may be inserted into the drill hole 21 to perform rock breaking at multiple locations. For example, when using two rock breaking tools 1, the rock breaking tool 1 in the pre-pushing state shown in FIG. 2(a) is inserted into the drill hole 21 as the "first rock breaking tool" of the present invention, and the lower wedge member 11 is placed on the bottom surface 211 of the drill hole 21. Subsequently, another rock breaking tool 1 in the pre-pushing state shown in FIG. 2(a) is inserted into the drill hole 21 as the "second rock breaking tool" of the present invention, and the lower wedge member 11 of the second rock breaking tool 1 is placed on the upper wedge member 12 of the first rock breaking tool 1. After that, as in the first and second embodiments, a strike is applied to the upper wedge member 12 of the second rock breaking tool 1, pushing the upper wedge member 12 down in the (Z2) direction while sliding against the lower wedge member 11 of the second rock breaking tool 1, and the upper wedge member 12 of the first rock breaking tool 1 is also pushed down in the (Z2) direction while sliding against the lower wedge member 11. This introduces cracks in the two rock breaking regions, and these rock breaking regions are crushed.

[0035] In addition, in the above embodiment, the above steps (2) to (4) are performed continuously for one drilled hole 21, but it is also possible to form a plurality of drilled holes 21 in a row in advance and perform all or some of these steps in parallel to perform the crushing process continuously.

[0036] The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-mentioned embodiment, the connecting mechanism 15 generates a biasing force using ten spring members 151, but the number of spring members 151 is not limited to this, and for example, as shown in Fig. 7, fourteen spring members 151 may be used depending on the shape and size of the first blade member 13 and the second blade member 14 (third embodiment). [Industrial Applicability]

[0037] The present invention can be applied to all rock-breaking tools for breaking up objects to be treated, such as bedrock, boulders, and concrete structures, and to all crushing techniques for crushing objects to be treated using such tools. [Explanation of symbols]

[0038] 1...Rock splitting tool 2. Object to be treated 11...Lower wedge member 12...Upper wedge member 13...First blade member 14...Second blade member 15...Connection mechanism 16...long axis body 21…Drilling 22…Free surface 23,25…split rock area 111,121...Base part 112...First slope part 112a...(First inclined portion) inclined surface 113...Top part (first restriction part) 122…Second slope part 122a...(Second inclined portion) inclined surface 123...Top part (second restriction part) 151...Spring member 161...(2nd) end face 162...(1st) end surface 211...Bottom of (drilled hole) 212...(Drilling) opening SR…Sliding contact area Y: Radial direction (orthogonal direction)

Claims

1. A lower wedge member having a first inclined portion tapered toward an opening of a hole formed in the processing object and configured to be insertable into the hole; an upper wedge member having a second inclined portion tapered toward the bottom surface of the hole, the second inclined portion being in sliding contact with the first inclined portion of the lower wedge member inserted into the hole and being movable along the depth direction of the hole; a first blade member and a second blade member provided to sandwich a sliding contact area where the first inclined portion and the second inclined portion slide against each other in a direction perpendicular to the depth direction within the drilled hole; a connecting mechanism that connects the first blade member and the second blade member to each other while applying a biasing force so as to press the first blade member and the second blade member against the first inclined portion and the second inclined portion, When an external force is applied to the upper wedge member toward the bottom surface, the upper wedge member slides toward the bottom surface, and the lower wedge member and the first blade member move together in the perpendicular direction within the hole while resisting the biasing force, and the first blade member presses the inner wall of the hole. A rock splitting tool characterized by:

2. The rock splitting tool according to claim 1, A rock breaking tool, wherein the lower wedge member has a first regulating portion provided adjacent to the first inclined portion on the opening side of the drilling hole, and the first regulating portion regulates the first blade member from moving toward the opening side.

3. The rock splitting tool according to claim 1, The upper wedge member has a second regulating portion provided adjacent to the second inclined portion on the bottom side, and the second regulating portion regulates the second blade member from moving toward the bottom side, a rock breaking tool.

4. The rock splitting tool according to any one of claims 1 to 3, The upper wedge member is inserted entirely into the drill hole, and the upper wedge member is provided with a long shaft extending along the drill hole on the opening side of the drill hole. A rock breaking tool in which a first end face of the long shaft body that faces the upper wedge member abuts the upper wedge member, while a second end face opposite the first end face receives the external force, thereby causing the long shaft body to transmit the external force to the upper wedge member.

5. A step of inserting the rock breaking tool according to claim 1 into the hole while pressing the first and second blade members against the first and second inclined portions, respectively, by the connecting mechanism, and causing the first and second inclined portions to slide against each other, and placing the lower wedge member on the bottom surface of the hole; a step of applying an external force toward the bottom surface to the upper wedge member of the rock breaking tool inserted into the drilled hole, thereby moving the lower wedge member and the first blade member together in the perpendicular direction within the drilled hole while resisting the biasing force, thereby pressing the inner wall of the drilled hole with the first blade member to fracturize the periphery of the drilled hole; A crushing method comprising:

6. A step of inserting a first rock breaking tool having the same configuration as the rock breaking tool described in claim 1 into the drilling hole while pressing the first and second blade members against the first and second inclined portions, respectively, by the connecting mechanism, and placing the lower wedge member on the bottom surface of the drilling hole; Following the insertion of the first rock-breaking tool into the drilling hole, a second rock-breaking tool having the same configuration as the rock-breaking tool described in claim 1 is inserted into the drilling hole while pressing the first and second blade members against the first and second inclined portions, respectively, by the connecting mechanism, and the first and second inclined portions are in sliding contact with each other, and the lower wedge member of the second rock-breaking tool is placed on the upper wedge member of the first rock-breaking tool; a step of applying an external force toward the bottom surface to the upper wedge member of the second rock breaking tool inserted into the drilling hole, thereby moving the lower wedge member and the first blade member together in the perpendicular direction within the drilling hole while resisting the biasing force in each of the first rock breaking tool and the second rock breaking tool inside the drilling hole, thereby pressing the inner wall of the drilling hole with the first blade member to crush the periphery of the drilling hole; A crushing method comprising:

Images