WO2022080161A1 - 多方向オーガービット - Google Patents

多方向オーガービット Download PDF

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Publication number
WO2022080161A1
WO2022080161A1 PCT/JP2021/036552 JP2021036552W WO2022080161A1 WO 2022080161 A1 WO2022080161 A1 WO 2022080161A1 JP 2021036552 W JP2021036552 W JP 2021036552W WO 2022080161 A1 WO2022080161 A1 WO 2022080161A1
Authority
WO
WIPO (PCT)
Prior art keywords
auger
excavation
tip
directional
auger bit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/036552
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
剛巳 石塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metal Tool Inc
Original Assignee
Metal Tool Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metal Tool Inc filed Critical Metal Tool Inc
Priority to KR1020227044167A priority Critical patent/KR102791944B1/ko
Priority to EP21879901.3A priority patent/EP4230836A4/en
Priority to CN202180040862.5A priority patent/CN115698461A/zh
Publication of WO2022080161A1 publication Critical patent/WO2022080161A1/ja
Priority to US17/993,407 priority patent/US12123263B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/56—Screw piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/285—Teeth characterised by the material used
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements

Definitions

  • the present invention relates to a multi-directional auger bit that simultaneously excavates a drilling surface in a plurality of directions.
  • an auger head is connected to a drive mechanism, and a foundation hole of a building, a construction hole of a continuous underground wall body, etc. are excavated in the ground.
  • the auger bit provided at the tip of the auger head is provided with a blade portion for excavation. This is almost the same for the steel pipe Nakabori method.
  • the excavation blade is composed of a central tip and side tips on both sides, and a removable earth auger bit with an overlay is disclosed on the excavation head.
  • the central tip constitutes a wedge-shaped blade that protrudes in a curved state with respect to the side tip.
  • a blade having a self-sustaining blade function in which the blade edge portion falls off according to the excavation action and regenerates a new blade edge portion is applied, and the excavation blade has a rod-shaped tip embedded in the blade member body from cemented carbide. It is a thing.
  • Patent Document 1 merely discloses a detachable earth auger bit and an earth auger having an improved detachable structure.
  • the auger bit for the auger head is attached to the outer plate or inner plate of the casing, or both the outer plate and the inner plate, and the excavation direction and the hole wall direction, or the excavation direction and the pile core direction, with respect to the excavation surface.
  • the present invention has been made in view of such problems, and an object thereof is the excavation direction and the hole wall direction, the excavation direction and the pile core direction, or all of them with respect to the excavation surface.
  • the purpose is to provide technology for simultaneous excavation in directions.
  • the multi-directional auger bit according to the first aspect of the present invention is an auger bit mounted on the auger head, and includes a base having a tip protruding in the axial direction of the auger head. At the tip of the base, a first cemented carbide chip protruding in the excavation direction and a second cemented carbide chip protruding in the hole wall or pile core direction were arranged and installed.
  • the multi-directional auger bit according to the second aspect of the present invention is an auger bit mounted on an auger head, and has a base having a tip protruding in the axial direction of the auger head, and a leg portion continuous with the base.
  • the base portion is continuous from the first inclined portion, a flat surface portion continuous with the leg portion, a first inclined portion inclined from the flat surface portion in the axial direction of the auger head toward the tip end side, and the first inclined portion. It is composed of left and right side surface portions and a second inclined portion inclined from the first inclined portion in the axial direction of the auger head toward the leg side, and the first inclined portion, the side surface portion, and the second.
  • a first cemented carbide chip is disposed on the inclined portion, and the second cemented carbide chip extends from one of the left and right side surface portions to the first inclined portion in a direction perpendicular to the left and right side surface portions. It is arranged so as to project to the.
  • the multi-directional auger bit according to the first to third embodiments of the present invention is attached to the outer plate or inner plate of the casing, or both of the outer plate and the inner plate, and is attached to the excavation surface in the excavation direction and the hole wall direction, or. It is characterized by simultaneous excavation in the excavation direction and the pile core direction, or in all directions thereof. Further, the auger bit is attached to the outside of the excavation blade and is characterized in that simultaneous excavation is performed in both the excavation direction and the hole wall direction with respect to the excavation surface.
  • the multi-directional auger bit is equipped with carbide tips in the excavation direction and the hole wall direction, or in the excavation direction and the pile core direction, respectively.
  • the size, shape, mounting angle, and number of cemented carbide chips mounted in the excavation direction, the hole wall direction, and the pile core direction can be appropriately changed according to the excavation target.
  • the hardness of the cemented carbide tip can be selected from the excavation direction, the hole wall direction, and the pile core direction according to the excavation target.
  • the mounting method of the multi-directional auger bit may be either a removable type (first and second embodiments) or a welding type (third embodiment).
  • first to third embodiments will be described in detail.
  • FIG. 1 shows and describes a configuration of a multi-directional auger bit according to the first embodiment of the present invention. More specifically, FIG. 1 (a) is a perspective view of the auger bit, FIG. 1 (b) is a plan view, and FIG. 1 (c) is a side view. In addition, in FIG. 1A, the illustration of the hard overlay is omitted in order to clearly show the structure of each part.
  • the pile core direction is the "center of the pile” in all pile works such as ready-made piles, cast-in-place piles, and steel pipe piles used for foundation work, and is used for pulling out various piles, removing obstacles, etc.
  • the hole wall direction refers to the outer peripheral side of piles in all pile works such as ready-made piles, cast-in-place piles, and steel pipe piles used for foundation work, and the casing used for pulling out various piles and removing obstacles. It means the outer peripheral side of the excavation blade, that is, the hole wall of the underground hole constructed by excavating the ground or an obstacle.
  • the base 2 has a so-called mountain-shaped shape in which the top protrudes toward the tip side of the multi-directional auger bit 1 in the axial direction of the auger head. More specifically, the flat surface portion 2a of the base 2 of the multi-directional auger bit 1 is parallel to the planes of the legs 3 and 4, and the flat surface portion 2a of the base 2 is the axial direction and the tip of the auger head. Three inclined portions 2b, 2c, and 2d inclined toward the side are continuous.
  • the inclined portion 2b has the left end continuous with the side surface portion 2e when viewed from the tip side in the axial direction of the auger head, and the inclined portion 2d has the side surface at the right end when viewed from the tip side in the axial direction of the auger head. It is continuous with the part 2f.
  • the inclined portions 2b, 2c, and 2d of the base portion 2 are continuous in this order in the axial direction of the auger head, in the lateral direction when viewed from the tip side, that is, in the circumferential direction of the auger head.
  • the inclined portion 2b is inclined toward the circumferential direction of the auger head with respect to the inclined portion 2c
  • the inclined portion 2d is inclined in the circumferential direction (inclined portion) of the auger head with respect to the inclined portion 2c. It is tilted toward the direction opposite to the tilt direction of 2b).
  • the lower ends of the inclined portions 2b, 2c, and 2d of the base portion 2 are continuous with the inclined portions 2g.
  • the inclined portion 2g of the base portion 2 is 17.5 degrees with respect to the plane parallel to the plane portion 2a of the base portion 2, and is the axial direction of the auger head, the rear end side of the multidirectional auger bit 1, that is, the auger head of the auger bit 1. It is tilted toward the mounting side.
  • a hard overlay 7 is disposed on the base 2.
  • a first cemented carbide tip 5 is disposed at the lower portion of the inclined portions 2b, 2c, and 2d of the base portion 2 of the multidirectional auger bit 1. According to the first cemented carbide tip 5, wear on the outside of the contact surface can be prevented. Further, a second cemented carbide tip 6 is provided from the inclined portion 2d of the base portion 2 of the multidirectional auger bit 1 to the side surface portion 2f.
  • the second cemented carbide tip 6 has a so-called mountain-shaped shape, and the top thereof faces the hole wall direction or the pile core direction.
  • the hole wall direction and the pile core direction are directions perpendicular to the excavation direction.
  • the second carbide tip 6 faces the hole wall direction, and when arranged on the inner plate, the second carbide tip 6 is It will face the direction of the pile core.
  • the grades and hardness of the first and second cemented carbide chips 5 and 6 can be freely combined according to the ground or obstacle to be excavated.
  • the first and second cemented carbide chips 5 and 6 include E3 (material name MG30), E4 (material name MG40), E5 (material name MG50), and E6 (material name MG60), which are JIS usage classification symbols.
  • Etc., G4 (CIS grade code VC-40), G5 (CIS grade code VC-50), etc. of the CIS standard can be adopted. However, it is of course not limited to this.
  • the excavation direction and the hole wall direction, the excavation direction and the pile core direction, or all directions thereof with respect to the excavation surface It is possible to perform simultaneous excavation.
  • FIG. 2 shows and describes a configuration of a multi-directional auger bit according to a second embodiment of the present invention. More specifically, FIG. 2A is a perspective view of the auger bit, FIG. 2B is a plan view, and FIG. 2C is a side view. In addition, in FIG. 2A, the illustration of the hard overlay is omitted in order to clearly show the structure of each part.
  • the multi-directional auger bit 11 is composed of a base 12 and two legs 13 and 14 extending from the base 12.
  • the base 12 side is also referred to as the tip of the multi-directional auger bit 11
  • the legs 13 and 14 are also referred to as the attachment side to the auger head or the rear end of the multi-directional auger bit 11.
  • the direction in which the tip is facing is the excavation direction
  • the direction perpendicular to the excavation direction is the hole wall direction or the pile core direction.
  • the base 12 has a so-called mountain-shaped shape in which the top protrudes toward the tip side of the multi-directional auger bit 11 in the axial direction of the auger head. More specifically, the flat surface portion 12a of the base portion 12 of the multidirectional auger bit 11 is parallel to the planes of the legs 13 and 14, and the flat surface portion 12a of the base portion 12 has the axial direction and the tip end of the auger head. Three inclined portions 12b, 12c, and 12d inclined toward the side are continuous.
  • the inclined portion 12b has the left end continuous with the side surface portion 12e when viewed from the tip side in the axial direction of the auger head, and the inclined portion 12d has the side surface at the right end when viewed from the tip side in the axial direction of the auger head. It is continuous with the part 12f.
  • the inclined portions 12b, 12c, 12d of the base portion 12 are continuous in this order in the axial direction of the auger head, in the lateral direction when viewed from the tip side, that is, in the circumferential direction of the auger head.
  • the inclined portion 12b is inclined toward the circumferential direction of the auger head with respect to the inclined portion 12c
  • the inclined portion 12d is inclined in the circumferential direction of the auger head with respect to the inclined portion 12c (inclined portion 12b). It is tilted toward the direction opposite to the tilting direction of.
  • the lower ends of the inclined portions 12b, 12c, and 12d of the base portion 12 are continuous with the inclined portion 12g.
  • the inclined portion 12g of the base portion 12 is directed to the axial direction of the auger head, the rear end side of the auger bit 1, that is, the auger head of the multidirectional auger bit 11 at 17.5 degrees with respect to the plane parallel to the flat surface portion 12a of the base portion 12. It is tilted toward the mounting side of.
  • a hard overlay 18 is disposed on the base 12.
  • the legs 13 and 14 extend from the base 12 toward the rear end side in the axial direction of the auger head so as to be parallel and U-shaped when viewed from the side surface at predetermined intervals. ..
  • the legs 13 and 14 are provided with four holes 13a and 14a, respectively, for mounting the multi-directional auger bit 11 on the auger head with bolts or the like.
  • the second carbide tips 16 and 17 face the hole wall direction, and when arranged on the inner plate, the second carbide tip 16 and 17 are oriented toward the hole wall.
  • the carbide tips 16 and 17 face the pile core direction.
  • the grades and hardness of the first and second cemented carbide chips 15, 16 and 17 can be freely combined according to the ground or obstacle to be excavated.
  • SCM440 chromoly steel
  • the first and second cemented carbide chips 15, 16 and 17 are E3 (material name MG30), E4 (material name MG40), E5 (material name MG50) and E6 (material name) in JIS usage classification symbols. MG60) and the like, CIS standard G4 (CIS grade code VC-40), G5 (CIS grade code VC-50) and the like can be adopted.
  • CIS standard G4 CIS grade code VC-40
  • G5 CIS grade code VC-50
  • the present invention is not limited to this.
  • the excavation direction and the hole wall direction, the excavation direction and the pile core direction, or all the directions at the same time with respect to the excavation surface It becomes possible to excavate.
  • FIG. 3 shows and describes a configuration of a multi-directional auger bit according to a third embodiment of the present invention. More specifically, FIG. 3 (a) is a perspective view of the multi-directional auger bit, FIG. 3 (b) is a plan view, and FIG. 3 (c) is a side view. In addition, in FIG. 3A, the illustration of the hard overlay is omitted in order to clearly show the structure of each part.
  • the multi-directional auger bit 21 is composed of a base portion 22 and a leg portion (also referred to as a welded portion) 23 extending from the base portion 22.
  • the base 22 side is also referred to as the tip of the auger bit 21
  • the welded portion 23 side is also referred to as the mounting side to the auger head or the rear end of the auger bit 21.
  • the direction in which the tip is facing is the excavation direction
  • the direction perpendicular to the excavation direction is the hole wall direction or the pile core direction.
  • the inclined portion 22b has the left end continuous with the side surface portion 22e when viewed from the tip side in the axial direction of the auger head, and the inclined portion 22d has the side surface at the right end when viewed from the tip side in the axial direction of the auger head. It is continuous with the part 22f.
  • the inclined portions 22b, 22c, 22d of the base portion 22 are continuous in this order in the axial direction of the auger head, in the lateral direction when viewed from the tip side, that is, in the circumferential direction of the auger head.
  • the inclined portion 22b is inclined toward the circumferential direction of the auger head with respect to the inclined portion 22c
  • the inclined portion 22d is inclined in the circumferential direction of the auger head with respect to the inclined portion 22c (inclined portion 22b). It is tilted toward the direction opposite to the tilting direction of.
  • the lower ends of the inclined portions 22b, 22c, and 22d of the base portion 22 are continuous with the inclined portion 22g.
  • the inclined portion 22g of the base portion 22 is 15 degrees with respect to a plane parallel to the flat surface portion 22a of the base portion 22 in the axial direction of the auger head, the rear end side of the auger bit 21, that is, the mounting side of the auger bit 21 to the auger head. It is tilted toward.
  • a hard overlay 27 is disposed on the base 22.
  • the leg portion 23 extending in the rear end direction from the base portion 22 is a portion to be welded when the auger bit 1 is fixed to the auger head.
  • a first cemented carbide tip 25 is disposed at the lower portions of the inclined portions 22b, 22c, and 22d of the base portion 22 of the multi-directional auger bit 21. According to the first cemented carbide tip 25, wear on the outside of the contact surface can be prevented. Further, a second carbide tip 26 is provided from the inclined portion 22d of the base portion 22 of the multidirectional auger bit 21 to the side surface portion 22f.
  • the second cemented carbide tip 26 has a so-called mountain-shaped shape, and the top thereof faces the hole wall direction or the pile core direction.
  • the hole wall direction and the pile core direction are directions perpendicular to the excavation direction.
  • the second carbide tip 26 faces the hole wall direction, and when arranged on the inner plate, the second carbide tip 26 is It will face the direction of the pile core.
  • the grades and hardnesses of the first and second cemented carbide chips 25 and 26 can be freely combined according to the ground or obstacle to be excavated.
  • SCM440 chromoly steel
  • the first and second cemented carbide chips 25 and 26 include E3 (material name MG30), E4 (material name MG40), E5 (material name MG50), E6 (material name MG60), etc., which are used in JIS usage classification symbols.
  • CIS standard G4 CIS grade code VC-40
  • G5 CIS grade code VC-50
  • the excavation direction and the hole wall direction, the excavation direction and the pile core direction, or all directions thereof with respect to the excavation surface It is possible to perform simultaneous excavation.
  • FIG. 4 shows how the first and second multidirectional auger bits of the present invention are attached to the casing, and the effects thereof will be described in detail. More specifically, FIG. 4 (a) is a perspective view showing the state of mounting, FIG. 4 (b) is a plan view showing the state of mounting, and FIG. 4 (c) is a side view showing the state of mounting.
  • the first carbide tip mounted in the excavation direction excavates the excavation direction and the hole wall direction side.
  • the second carbide tip attached to the hole alleviates the earth pressure and friction from the hole wall side, and at the same time, increases the size of the pile diameter.
  • the size of the pile diameter can be increased by arbitrarily changing the size of the second cemented carbide tip mounted in the hole wall direction.
  • the second super hard chip mounted on the hole wall direction side assists the excavated soil excavated by the first super hard chip mounted in the excavation direction to be scraped upward from the excavated surface, thereby causing the casing.
  • the earth pressure and friction applied to the tip of the excavation are alleviated, and the excavation efficiency is improved.
  • the excavation path becomes uniform, so that the effect of increasing the size of the pile diameter or the effect of increasing the size of the obstacle removal diameter can be obtained.
  • the second carbide tip mounted in the hole wall direction alternately mounts one multi-directional auger bit 1 and two multi-directional auger bits 11.
  • the second super hard chip mounted on the pile core direction side assists the excavated soil excavated by the first super hard tip mounted on the excavation direction side to be scraped upward from the excavated surface, thereby causing the casing.
  • the earth pressure and friction applied to the tip of the sill are alleviated, and the excavation efficiency is improved, and at the same time, the efficiency of taking out the excavated soil inside the casing is increased.
  • the second carbide tip mounted on the pile core direction side excavates the inside of the casing, it gives a screwing effect on the rotation direction side, and the excavation force increases.
  • the size of the obstacle inside the casing can be reduced only by attaching the auger bit, and the efficiency of taking out the obstacle inside the casing is improved.
  • the size of the obstacle can be reduced by arbitrarily changing the size of the second cemented carbide tip mounted in the direction of the pile core.
  • the excavation path becomes uniform, so that the effect of removing excavated soil and obstacles is further improved.
  • one multi-directional auger bit 1 and two multi-directional auger bits 11 are alternately attached to the tip mounted in the pile core direction.
  • FIG. 5 shows how the first and second multidirectional auger bits of the present invention are attached to the outside of the screw-shaped auger head (also referred to as an excavation blade), and the effect thereof will be described.
  • 5 (a) is a side view showing how the multi-directional auger bit is attached to the auger head
  • FIG. 5 (b) is a plan view showing how the multi-directional auger bit is attached to the auger head. be.
  • the first carbide tip mounted in the excavation direction excavates the excavation direction and the hole wall direction side.
  • the second carbide tip attached to the hole alleviates the earth pressure and friction from the hole wall side, and at the same time, increases the size of the pile diameter.
  • the size of the pile diameter can be increased by arbitrarily changing the size of the second tip to be mounted in the hole wall direction.
  • the multi-directional auger bit for the casing auger according to the present embodiment can be used for construction using, for example, a prefabricated pile construction method, a steel pipe middle moat construction method, etc. , And wear is less than before.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
PCT/JP2021/036552 2020-10-13 2021-10-04 多方向オーガービット Ceased WO2022080161A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020227044167A KR102791944B1 (ko) 2020-10-13 2021-10-04 다방향 오거 비트
EP21879901.3A EP4230836A4 (en) 2020-10-13 2021-10-04 MULTIDIRECTIONAL AUGER DRILL
CN202180040862.5A CN115698461A (zh) 2020-10-13 2021-10-04 一种多向钻块
US17/993,407 US12123263B2 (en) 2020-10-13 2022-11-23 Multidirectional auger bit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020172348A JP6868924B1 (ja) 2020-10-13 2020-10-13 多方向オーガービット
JP2020-172348 2020-10-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/993,407 Continuation US12123263B2 (en) 2020-10-13 2022-11-23 Multidirectional auger bit

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WO2022080161A1 true WO2022080161A1 (ja) 2022-04-21

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US (1) US12123263B2 (https=)
EP (1) EP4230836A4 (https=)
JP (2) JP6868924B1 (https=)
KR (1) KR102791944B1 (https=)
CN (1) CN115698461A (https=)
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JP7181661B1 (ja) * 2022-09-12 2022-12-01 金属工具株式会社 ツインビット
JP7551198B1 (ja) * 2024-05-10 2024-09-17 金属工具株式会社 脱着式テーパービット

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CN115698461A (zh) 2023-02-03
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US12123263B2 (en) 2024-10-22
KR20230011400A (ko) 2023-01-20
EP4230836A1 (en) 2023-08-23
KR102791944B1 (ko) 2025-04-07
US20230091613A1 (en) 2023-03-23
JP2022064272A (ja) 2022-04-25

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