CN108291429A - Digging tool and method for digging - Google Patents
Digging tool and method for digging Download PDFInfo
- Publication number
- CN108291429A CN108291429A CN201680071232.3A CN201680071232A CN108291429A CN 108291429 A CN108291429 A CN 108291429A CN 201680071232 A CN201680071232 A CN 201680071232A CN 108291429 A CN108291429 A CN 108291429A
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- China
- Prior art keywords
- mentioned
- tool body
- drill bit
- groove portion
- water
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
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- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Abstract
In the digging tool of the present invention, the inner circumferential insert that the excavation pipe of tool body is equipped in front end has snorkel, and the periphery of above-mentioned excavation pipe is provided with water route, it is formed with discharge path in the front end of above-mentioned tool body, the discharge path is formed with the gas vent to above-mentioned space openings for will be discharged in the space between above-mentioned excavation pipe and above-mentioned snorkel together with landwaste and above-mentioned excavation water in the front end of above-mentioned snorkel.
Description
Technical field
The present invention relates to manage interior discharge in a kind of landwaste income tool body generated when that will excavate and by excavating
Digging tool used in reacting cycle method and the method for digging for having used the digging tool.
This application claims based on January 20th, 2016 in the priority of the patent application 2016-008874 of Japanese publication,
And its content is applied at this.
Background technology
In the basic pile-driving method for having used casing, usually sprayed from the front end of excavating bur for hitting excavating bur
The compressed air of (tool body), and soil sand, that is, landwaste that is using the compressed air that laccolite when excavating is broken and generating passes through
Casing and the space excavated between bar are discharged to rear end side.But if implementing this construction method in urban area, due to
The compressed air sprayed from the front end of excavating bur escapes in the laccolite around excavated hole and reduces the intensity of surrounding laccolite,
To may result in the avalanche of laccolite around in some cases.
In this case, by will be contaminated with bentonitic slime water be supplied to excavated hole with prevent compressed air leakage be
Effectively, it but needs that the high specific gravity landwaste for being contaminated with slime water is discharged, therefore is also required to improve sprayed compressed air
Pressure.Therefore, as the digging tool used in this method, such as following digging tool is proposed in patent document 1, that is,
It is used as conveying water by supplying clear water in casing, and is contaminated with the landwaste of the conveying water by vacuum pumping and discharge.
Patent document 1：Japanese Unexamined Patent Publication 2007-170087 bulletins
However, in digging tool recorded in this patent document 1, vacuum pump is not only needed, but also be contaminated with landwaste
Conveying water also by the vacuum pump, therefore vacuum pump may be damaged in advance, it is difficult to carry out stable digging for a long time
Pick.
Invention content
The present invention completes in this background, and its purpose is to provide one kind can be without using vacuum pump the case where
Under be effectively discharged out the digging tool for the water for being contaminated with landwaste and used the method for digging of the digging tool.
It in order to solve the above problems and realizes that this purpose, digging tool of the invention are characterized in that, matches in front end
The inner circumferential insert of excavation pipe equipped with tool body has the snorkel of supply compressed air, and is set in the periphery of above-mentioned excavation pipe
It is equipped with the water route for being supplied to the front end of above-mentioned tool body and excavating water, discharge is formed in the front end of above-mentioned tool body
Road, the discharge path are used to the landwaste generated when excavating being discharged to together with the above-mentioned excavation water supplied from above-mentioned water route above-mentioned
It excavates in the space between pipe and above-mentioned snorkel, the exhaust to above-mentioned space openings is formed in the front end of above-mentioned snorkel
Hole.
Also, the method for digging of the present invention is characterized in that, using this digging tool, is formed using above-mentioned tool body
While excavated hole, is supplied to the front end of above-mentioned tool body by above-mentioned water route and excavate water, the rock that will be generated when excavating
Bits are discharged to by above-mentioned discharge path in the space between above-mentioned excavation pipe and above-mentioned snorkel together with above-mentioned excavation water, will be arranged
The above-mentioned landwaste and excavation water gone out into the space is discharged to rear end side by the compressed air being discharged from above-mentioned gas vent.
It the digging tool of above structure and has used in the method for digging as described above of the digging tool, in snorkel
Front end formed the oriented snorkel and excavate pipe between space openings gas vent, excavate when for example for hitting work
The compressed air of tool main body is supplied to snorkel and is discharged from gas vent, and will drain to the sky excavated between pipe and snorkel
Between in landwaste and excavate water and be discharged to rear end side by the release of the compressed air that be discharged from the gas vent.
It therefore, can in this way will be in order to assign hitting power to tool body according to this digging tool and method for digging
And supply compressed air use landwaste and excavate water discharge in, and excavate when excavate water be supplied to by water route
The front end of tool body, therefore can prevent from making strength reduction due to the laccolite that compressed air escapes to around excavated hole
Caused by avalanche.Also, it excavates water and is supplied to the front end of tool body by water route, therefore clear water conduct can be used
Water is excavated, nor needs the pressure of compressed air being increased to necessity or more.
Moreover, can the space excavated between pipe and snorkel be discharged to for landwaste and excavation water using compressed air in this way
Rear end side, therefore do not need vacuum pump, the vacuum pump caused by landwaste is by vacuum pump will not occur and damage.And
And if landwaste and excavation water is set to release to rear end side, than the space that gas vent is located further forward end side because compressed air is discharged
As negative pressure, therefore new landwaste can be sucked from the front end of tool body and excavates water and is continuously discharged to the space.
Here, above-mentioned gas vent can also be made to be formed as with towards the peripheral side of above-mentioned tool body and towards rear end
The mode of side tilts and to above-mentioned space openings.It is released to rear thereby, it is possible to will drain to the landwaste in the space and excavate water
End side and be further reliably discharged.Moreover, when the digging tool of above structure is suitable for having used the basic piling side of casing
, can also be using the casing as feed pipe when in method, and above-mentioned excavation pipe is inserted through to the inner circumferential of the feed pipe, it is above-mentioned to make
Water route is formed between above-mentioned feed pipe and above-mentioned excavation pipe.Thereby, it is possible to will excavate water to securely feed tool body
Front end.
It, can also be in above-mentioned tool body also, especially when casing has been inserted excavation pipe as feed pipe in this way
Front end periphery formed from the front end of the tool body a plurality of groove portion that end side extends backward, and in these a plurality of groove portions,
A part of groove portion is connected to above-mentioned water route, and remaining groove portion is connected to above-mentioned discharge path, to make above-mentioned a part of groove portion
Front end be connected to the front end of above-mentioned remaining groove portion by being formed in the connectivity slot of the front end face of above-mentioned tool body.By
This, can effectively return during the excavation water supplied from a part of groove portion flows into the front end of remaining groove portion by connectivity slot
Landwaste is received, and is discharged in the space excavated between pipe and snorkel from above-mentioned discharge path.
On the other hand, it can also be formed from the front end of the tool body to the back-end in the front end periphery of above-mentioned tool body
Side extends and the groove portion that be connected to above-mentioned water route, and in the above-mentioned tool body of side more inner than the groove portion formation from
The front end of the tool body hole portion that end side extends backward as above-mentioned discharge path, to make the front end of above-mentioned groove portion with it is above-mentioned
The front end of hole portion is connected to by being formed in the connectivity slot of the front end face of above-mentioned tool body.According to this structure, also the same energy
It is enough effectively to recycle landwaste during the excavation water supplied from groove portion flows into the front end of hole portion by connectivity slot.In addition, tool
The digging tool of the standby above structure can be used in the method for digging of the present invention.
As described above, according to the present invention, the strength reduction of the laccolite around excavated hole will not be made and lead to avalanche, and
Also the pressure of compressed air need not be increased to necessity or more, but also does not need vacuum pump, therefore can had with low cost
Effect carries out stable excavation.
Description of the drawings
Fig. 1 is the sectional view for the 1st embodiment for indicating the digging tool of the present invention.
Fig. 2 is the front view of the tool body of embodiment shown in FIG. 1.
Fig. 3 is the rearview of the shank in the tool body of embodiment shown in FIG. 1.
Fig. 4 is the ZZ sectional views in Fig. 1.
Fig. 5 is the sectional view for the 2nd embodiment for indicating the digging tool of the present invention.
Fig. 6 is the front view of the tool body of embodiment shown in fig. 5.
Fig. 7 is the rearview of the shank in the tool body of embodiment shown in fig. 5.
Fig. 8 is the ZZ sectional views in Fig. 5.
Specific implementation mode
Fig. 1 to Fig. 4 indicates the 1st embodiment of the digging tool of the present invention.In present embodiment, tool body 1 has：
Substantially multistage cylindric pilot drill bit 2 with the end, is formed, the axes O direction front end side (left side in Fig. 1 by metal materials such as steel
Side) it is set as level-one major diameter and centered on axes O；And ring bit 3, guide brill is mounted in a manner of it can dismantle
First 2 front end periphery, and be equally formed as the annular shape centered on axes O or cylindrical shape by metal materials such as steel.
The rear end of the path of pilot drill bit 2 is set as being formed on the outer periphery the shank 2A of external thread part, cylindrical shape excavate pipe P1 by with
The external thread part of shank 2A is screwed togather and is mounted on shank 2A.Pilot drill bit 2 is assigned by the excavation pipe P1 and surrounds axes O
Rotary force and thrust and hitting power to axes O direction front end side.In addition, in this specification, by the extending direction of axes O
Referred to as axes O direction will be known as a front end side (left side of Fig. 1 in axes O direction from the direction for excavating pipe P1 towards pilot drill bit 2
Side), and rear end side (right side of Fig. 1) will be known as from pilot drill bit 2 towards the direction for excavating pipe P1.Also, will by axes O and
The direction orthogonal with axes O is known as radial direction or radial direction.Direction (radially inner side) close to axes O in radial direction is known as inner circumferential
Side, and the direction (radial outside) that will be far from axes O is known as peripheral side.Moreover, by circumference is known as around the direction that axes O rotates
Direction.
In present embodiment, the front end than the pilot drill bit 2 that shank 2A is located further forward end side is formed towards front end side
And diameter reduces substantially three-level.That is, the front end of pilot drill bit 2 has the large-diameter portion 2B of largest outside diameter from rear end side successively；Outside
The diameter central diameter portion 2C smaller than the outer diameter of large-diameter portion 2B；And the small diameter portion 2D that outer diameter is smaller than the outer diameter of central diameter portion 2C.It is wherein in place
The guide of conical surface-shaped is formed between the peripheral surface and the peripheral surface of the central diameter portion 2C of next of the large-diameter portion 2B of last end side
Drill bit side bearing surface 4, the pilot drill bit side bearing surface 4 is with towards axes O direction front end side and reduced diameter and with axis
Centered on line O.The elder generation of conical surface-shaped is formed between the peripheral surface of the small diameter portion 2D of the peripheral surface and front end of central diameter portion 2C
Lead drill bit side contacts face 5, the pilot drill bit side contacts face 5 with towards axes O direction front end side and reduced diameter and with
Centered on axes O.
Here, as shown in Figure 1, being set as on the section along axes O, pilot drill bit side contacts face 5 is relative to the axes O
Formed angle of inclination beta is less than above-mentioned pilot drill bit side bearing surface 4 relative to inclined angle alpha formed by the axes O.Present embodiment
In, as shown in Figure 1, length A of the pilot drill bit side bearing surface 4 on the direction parallel with axes O be formed as with length A phases
Radius (the reduction amount of the radius) B that is reduced when the amount answered is towards axes O direction front end side is hereinafter, i.e. pilot drill bit side bearing surface 4
Be formed as 45 ° or more relative to inclined angle alpha formed by axes O.In contrast, pilot drill bit side contacts face 5 is parallel with axes O
Direction on length C-shaped become and be more than with amount corresponding with the length C radius that reduces when towards axes O direction front end side
(the reduction amount of radius) D, to which pilot drill bit side contacts face 5 is set as relative to angle of inclination beta formed by axes O less than 45 °.
In addition, being set as the above-mentioned length C in pilot drill bit side contacts face 5 and the above-mentioned length A of pilot drill bit side bearing surface 4
Compared to long enough, and the above-mentioned radius D in pilot drill bit side contacts face 5 is compared with the above-mentioned radius B of pilot drill bit side bearing surface 4
It is slightly larger.Also, the peripheral surface of above-mentioned large-diameter portion 2B, central diameter portion 2C and small diameter portion 2D are set as the perseverance centered on axes O respectively
Determine the barrel surface of outer diameter, wherein length of the central diameter portion 2C in axes O direction is set as than large-diameter portion 2B and small diameter portion 2D in axes O
The length in direction is slightly long.
Moreover, in the front end periphery of the pilot drill bit 2, it is along the circumferential direction formed with a plurality of (this reality at substantially equal intervals
Apply in mode is three) from the front end face of pilot drill bit 2 groove portion 6 that end side extends backward.In these a plurality of groove portions 6, a part
Groove portion (groove portion on the left of on the upside of in Fig. 1 and in Fig. 2) 6A is penetrated through from the front end face of pilot drill bit 2 to above-mentioned large-diameter portion 2B's
Rear end face.Remaining groove portion (two groove portions on right side in downside and Fig. 2 in Fig. 1) 6B in a plurality of groove portion 6 is with from pilot drill bit 2
The mode nearby extended to outer peripheral side later that front end face extends to large-diameter portion 2B is cut.In other words, remaining groove portion 6B is from elder generation
The front end face for leading drill bit 2 extends near the rear end of the central diameter portion 2C in central diameter portion 2C, but is not penetrated large-diameter portion 2B.From the residue
The rear end of groove portion 6B starts, and is formed with as the discharge path 7 in present embodiment with towards inner circumferential side and towards rear end
The hole portion of the section circle of side.One end of the hole portion is open to the inner peripheral portion (inner peripheral surface) of the pilot drill bit 2 of bottomed cylindrical, separately
One end is open to the rear end of remaining groove portion 6B.
Also, it is formed with the front end of above-mentioned a part of groove portion 6A and remaining groove portion 6B in the front end face of pilot drill bit 2
The front end connectivity slot 8 that links and be connected to.In present embodiment, when front is observed as shown in Fig. 2, the connectivity slot 8 is formed
For Y shape, that is, connectivity slot 8 extends up to the axes O relative to axes O from the front end of a part of groove portion 6A along radial direction
Nearby after, two are branched into the case where not reaching axes O and is bent, and reaches the front end of two remaining groove portion 6B
Portion.In addition, the substantially square shape in the section of groove portion 6 or substantially be in U-shaped, towards bottom surface such as Fig. 1 of the peripheral side of the groove portion 6
It is shown like that, be slightly tilted relative to axes O in a manner of with towards rear end side and towards peripheral side.As shown in figure 4, connection
The section of slot 8 extends in U-shaped and in the plane vertical with axes O.
Moreover, pilot drill bit 2 front end face be formed with other than the opening portion of above-mentioned groove portion 6 and connectivity slot 8 in
The contact surface of the vertical planar central portion of axes O；And it is tilted in a manner of with towards rear end side and towards peripheral side
Conical surface-shaped peripheral part measuring surface.On these contact surfaces and alignment surface, to avoid opening portion and the connectivity slot of groove portion 6
8 mode, the vertical implantation of the excavation blade 9 that is made of the hard alloy etc. harder than pilot drill bit 2 and be set to contact surface and
Alignment surface.
In addition, the peripheral surface of the above-mentioned small diameter portion 2D in pilot drill bit 2, from the end side forward of pilot drill bit side contacts face 5
It separates on the position of slight gap, is along the circumferential direction equally spaced formed with a plurality of (being three in present embodiment) to outer peripheral side
The protrusion 2E of circular arc plate (there is the peripheral surface as the cambered surface centered on axes O) prominent and using centered on axes O.
These protrusions 2E is in the present embodiment from one end of the circumferencial direction of above-mentioned groove portion 6 (as shown in Fig. 2, when from front
Anticlockwise end) extend, and the excavation blade 9 of alignment surface is implanted into and is provided on protrusion 2E.
In the rear end of the above-mentioned ring bit 3 of annular shape or cylindrical shape mounted on the periphery of this pilot drill bit 2
Inner peripheral surface is formed with towards axes O direction front end side and reduced diameter and the conical surface-shaped centered on axes O
Ring bit side contacts face 10.The ring bit side contacts face 10 is formed and elder generation in the section along axes O relative to the axes O
Lead the equal angle of inclination beta in drill bit side contacts face 5.
That is, identically as pilot drill bit side contacts face 5, ring bit side contacts face 10 is on the direction parallel with axes O
Length C-shaped become and be more than with amount corresponding with the length C radius D that reduces when towards axes O direction front end side, thus ring-type
Drill bit side contacts face 10 forms the angle of inclination beta less than 45 ° relative to axes O.As shown in Figure 1, this ring bit 3 makes the ring-type
Drill bit side contacts face 10 and pilot drill bit side contacts face 5 are closely sealed, and are mounted on from the front end of pilot drill bit 2 along axes O direction
The rear end in face to pilot drill bit side contacts face 5.In other words, in present embodiment, the length of the ring bit 3 on axes O direction
Degree and the same length on the front end face to the axes O direction of the rear end in pilot drill bit side contacts face 5 from pilot drill bit 2.
Moreover, with roughly the same with the position of the front end face of pilot drill bit 2 in the position of the front end face of axes O direction upper annular drill bit 3
Mode ring bit 3 is installed in the periphery of pilot drill bit 2.
Also, the inner peripheral surface of the front end of ring bit 3 has the internal diameter more slightly larger than the small diameter portion 2D of pilot drill bit 2.
The inner peripheral surface of the front end, be along the circumferential direction equally spaced formed with and the ratio pilot drill bit 2 of the identical quantity of protrusion 2E it is prominent
Play the slightly wider concave part 3A of the width of portion 2E in a circumferential direction, and concave part 3A is formed as along axes O direction from ring-type
The perforation of ring bit side contacts face 10 is stated upwardly in the front end of drill bit 3.The radial depth of concave part 3A is set as, concave part 3A's
Internal diameter is more slightly larger than the outer diameter of protrusion 2E.
Moreover, circumferencial direction from concave part 3A one end (with the protrusion 2E of pilot drill bit 2 from groove portion 6 circumferentially
The end in the identical direction in end that direction extends, i.e. anticlockwise end in Fig. 2) it is formed with holding section 3B, the card
The length that the radial depth of conjunction portion 3B is equal with the radial depth of concave part 3A and holding section 3B is in axes O direction compares protrusion
Length of the 2E in axes O direction is slightly long, and the section along axes O direction of holding section 3B is L-shaped.Holding section 3B's
Inner peripheral surface is along the circumferential direction connected smoothly in its front end side and the inner peripheral surface of concave part 3A.By making concave part 3A accommodate protrusion
Portion 2E is simultaneously inserted into ring bit 3 from the front end side of the front end of pilot drill bit 2, and makes pilot drill bit 2 to above-mentioned circumferencial direction
One end (counter clockwise direction in Fig. 2) rotates, and thus protrusion 2E can be chimeric with holding section 3B and be engaged.Therefore, in this way
In the state that protrusion 2E is chimeric with holding section 3B, the position of the groove portion 6 of pilot drill bit 2 and the concave part 3A of ring bit 3
It is aligned in a circumferential direction.In addition, holding section 3B is set as in the width of circumferencial direction, it is chimeric with holding section 3B in protrusion 2E
In the state of, the position of the groove portion 6 of pilot drill bit 2 is Chong Die with the concave part 3A of ring bit 3 in a circumferential direction.This embodiment party
In formula, holding section 3B is set as the degree of same size with protrusion 2E in circumferencial direction in the width of circumferencial direction.
Moreover, the front end face of the ring bit 3 also has the contact surface of the inner peripheral portion vertical with axes O；And with
The measuring surface of the inclined peripheral part of mode towards rear end side towards peripheral side.On these contact surfaces and alignment surface, by than ring
The excavation blade 9 of the compositions such as the harder hard alloy of shape drill bit 3 is vertically implanted into and is set to contact surface and alignment surface.In addition,
The peripheral surface of the front end of ring bit 3, between being implanted into and being set to the excavation blade 9 of alignment surface along the circumferential direction at equal intervals
Ground is formed with multiple groove 3C.
On the other hand, on the peripheral surface of ring bit 3 from the alignment surface of its front end face and rear end face along axes O direction every
The standard width of a room in an old-style house every position on, be formed in whole circumference along the section of axes O be in the rectangular shape that extends along axes O direction simultaneously
The ring bit side locking groove 11 being open to outer peripheral side.Also, the ring-type of end side more posteriorly than the ring bit side locking groove 11
The peripheral part of drill bit 3 is set as relative to the cricoid ring bit side engaging portion outstanding to outer peripheral side of ring bit side locking groove 11
12.The outer diameter of ring bit side engaging portion 12 is set as smaller than the outer diameter of the front end of ring bit 3, and ring bit side is locking
Length of the portion 12 in axes O direction is set as shorter in the length in axes O direction than ring bit side locking groove 11.In addition, at this
The rear end peripheral part of ring bit side engaging portion 12 implements chamfering.
Moreover, in present embodiment, it is equipped as described above in the periphery for the pilot drill bit 2 for being equipped with ring bit 3
Cylindrical sleeve 13 using centered on axes O is as the feed pipe P2 in present embodiment.Excavating the peripheries pipe P1 and casing 13
Water route F is formed between (feed pipe P2).Casing 13 is the front end of cylindrical pipe main body 13A centered on by axes O
Made of cylindrical sleeve top 13B of the engagements such as welding equally centered on axes O simultaneously integration.Pipe main body 13A tools
There is the internal diameter bigger than the outer diameter of the large-diameter portion 2B of pilot drill bit 2, according to the depth of excavated hole, multiple pipe main body 13A pass through welding
Deng and successively in succession (after ぎ foot) arrive pipe main body 13A rear end side.
The outer diameter that cannula tip 13B is formed as end thereafter is smaller than front end, the front end of the pipe main body 13A of front end
Portion is embedded and is engaged in the stepped part of cannula tip 13B.In other words, the outer diameter of the rear end of cannula tip 13B and pipe master
The internal diameter of the front end of body 13A is roughly the same, and the rear end of cannula tip 13B is chimeric with pipe main body 13A and engages.Also, it should
The internal diameter of the rear end of cannula tip 13B is set as, and the outer diameter than the large-diameter portion 2B of pilot drill bit 2 is slightly smaller, and than central diameter portion
The outer diameter of 2C is slightly larger.Moreover, the inner peripheral portion in the rear end face of cannula tip 13B is formed with casing side bearing surface 14, the casing side
Bearing surface 14 can be with the above-mentioned pilot drill bit side that is formed in the more posteriorly end side of pilot drill bit side contacts face 5 than pilot drill bit 2
Bearing surface 4 mutually abuts.
That is, the casing side bearing surface 14 be again formed as with towards axes O direction front end side and reduced diameter and with
Conical surface-shaped centered on axes O.As shown in Figure 1, on the section along axes O, the casing side bearing surface 14 is relative to axis
Inclined angle alpha formed by line O is set as such as lower angle, that is, the inclined angle alpha it is equal with the inclined angle alpha of pilot drill bit side bearing surface 4 and
It is bigger than pilot drill bit side contacts face 5 and angle of inclination beta formed by ring bit side contacts face 10.Moreover, in present embodiment, the set
Length A on 14 direction parallel to axes O in the section along axes O of pipe side bearing surface is formed as with corresponding with length A
Amount towards axes O direction front end side when the radius B that reduces hereinafter, to which above-mentioned inclined angle alpha is set as 45 ° or more.
Also, the outer diameter of the front end of cannula tip 13B is set as equal with the outer diameter of pipe main body 13A, and is set as
Outer diameter than the front end of the maximum outside diameter as ring bit 3 is small.In the front end inner peripheral portion of cannula tip 13B, before
End side and to be sequentially formed in whole circumference along the section of axes O be in the rectangular shape that extends along axes O direction and inside
The casing side locking groove 15 of all side openings；And relative to the casing side locking groove 15 to inner circumferential side casing side engaging portion outstanding
16。
These casing side locking groove 15 and casing side engaging portion 16 are set as, length and ring bit in axes O direction
The length difference of side locking groove 11 and ring bit side engaging portion 12 in axes O direction is equal.The internal diameter of casing side locking groove 15
It is set as more slightly larger than the outer diameter of ring bit side engaging portion 12.Also, the internal diameter of casing side engaging portion 16 is set as, and is bored than ring-type
The outer diameter of rostral locking groove 11 is slightly larger and more slightly smaller than the outer diameter of ring bit side engaging portion 12, in the casing side engaging portion 16
Front end inner peripheral portion implements chamfering.
By in 11 containment sheath side engaging portion 16 of ring bit side locking groove, and ring bit side engaging portion 12 is made to hold
It is contained in casing side locking groove 15, ring bit 3 rotates freely to surround axes O and is being formed with ring bit side locking groove 11
Also locking state is installed on cannula tip with axes O direction front end side and rear end side in the range of casing side locking groove 15
13B。
In addition, in order to install ring bit 3 in cannula tip 13B in this way, ring bit 3 is accommodated as follows,
That is, in the chamfered section of the rear end peripheral part for making such as ring bit side engaging portion 12 and the front end inner peripheral portion of casing side engaging portion 16
Point be mutually aligned on the basis of (abutting), by by least one of cannula tip 13B and ring bit 3 along axes O direction
It is pushed to another so that the rear end elasticity undergauge of the ring bit 3 and front end elasticity of cannula tip 13B is expanding, from
And casing side engaging portion 16 is made to be embedded in ring bit side locking groove 11, and ring bit side engaging portion 12 is made to be embedded in casing side card
Determine slot 15.After installing ring bit 3 in this way, cannula tip 13B is engaged with pipe main body 13A and is matched in the front end of casing 13
If ring bit 3.
In this way after ring bit 3 is arranged in the cannula tip 13B of 13 front end of casing, from 13 interpolation of rear end lateral cannula
Enter to be mounted on the pilot drill bit 2 for the front end for excavating pipe P1, as described above, after accommodating protrusion 2E in concave part 3A
Pilot drill bit 2 is set to be rotated to the one end of above-mentioned circumferencial direction, protrusion 2E is chimeric with holding section 3B and engages.Excavate pipe P1
Linked in succession successively according to the depth of excavated hole, the excavation pipe P1 of rearmost end is linked to excavating gear.It is thus inserted into set
The pilot drill bit 2 of pipe 13 is determined when its pilot drill bit side bearing surface 4 is abutted with the casing side bearing surface 14 of cannula tip 13B
Position.
Moreover, if make the front end of pilot drill bit 2 and ring bit 3 and laccolite etc. abut from the state, and pass through
Pipe P1 is excavated to assign around the rotary force of axes O and to axes O direction front end side pilot drill bit 2 from above-mentioned excavating gear
Thrust and hitting power and excavated, then the impedance from laccolite etc. and ring bit 3 is pulled to rear end side, to ring-type brill
First 3 ring bit side contacts face 10 and pilot drill bit side contacts face 5 are closely sealed.Alternatively, it is also possible to before excavation by ring bit 3
It is pressed to rear end side and keeps ring bit side contacts face 10 and pilot drill bit side contacts face 5 closely sealed.
Here, ring bit side engaging portion 12 and casing side engaging portion 16 are formed as, in this way in pilot drill bit side bearing surface 4
Abutted with casing side bearing surface 14 and ring bit side contacts face 10 and pilot drill bit side contacts face 5 it is closely sealed in the state of, such as
Ring bit side engaging portion 12 and casing side engaging portion 16 are separately equipped in casing side locking groove 15 and cyclic annular brill as shown in Figure 1
On the position spaced apart of the both ends in axes O direction of rostral locking groove 11.
Moreover, in the cylindric inner circumferential for excavating pipe P1, there are snorkel P3, and the front end of snorkel P3 from rear end side insert
Portion is inserted in the inner peripheral portion of the pilot drill bit 2 in tool body 1.And venting plug is installed in the front end of snorkel P3
17, and venting plug 17 is contained in the inner peripheral portion of pilot drill bit 2.Snorkel P3 is formed to have smaller than the internal diameter for excavating pipe P1
Outer diameter and the cylindrical shape centered on axes O are formed with the space of section annular shape between snorkel P3 and excavation pipe P1
E.When the inner peripheral portion of snorkel P3 for example supplies and assigns hitting power to pilot drill bit 2 as mentioned above for driving pneumatic hammer
Compressed air.
Venting plug 17 is formed as with the end multistage cylindric.Specifically, venting plug 17 has the big front end of outer diameter, outer
The small rear end of diameter and smaller than front end and bigger than the rear end middle part of outer diameter, any portion of peripheral surface is outer diameter
The cylinder planar of constant.It is formed with the external screw thread for the front end inner circumferential for being screwed into snorkel P3 in the rear end periphery of path
Portion.The front end of major diameter is set as capableing of the outer diameter of interval spaced slightly and the inner peripheral portion that is embedded in pilot drill bit 2.Also, the front end
The rear end face in portion is formed as with towards inner circumferential side and towards the conical surface-shaped of rear end side.That is, connection front end peripheral surface with
The rear end face of the front end of the peripheral surface of middle part is formed as conical surface-shaped.Inclination of the rear end face of front end relative to axes O
Angle is set as, and likewise as towards inner circumferential side and towards the above-mentioned discharge path 7 of the pilot drill bit of rear end side 2 relative to axes O
Inclination angle it is equal.This venting plug 17, which is matched, to be set as, and mounted on the front end of snorkel P3 and elder generation is inserted in the venting plug 17
In the state of the inner peripheral portion for leading drill bit 2, the front end rear end face of above-mentioned conical surface-shaped as shown in Figure 1 is located at pilot drill bit 2
The opening portion front-end edge of discharge path 7 in inner peripheral portion.In other words, the front end rear end face of the conical surface-shaped of venting plug 17 is outer
It is opened with the discharge path 7 in 2 inner peripheral portion of pilot drill bit on axes O direction with being set as the position of Zhou Duan (rear end of front end)
The aligned in position of oral area front-end edge.
Moreover, the inner peripheral portion of the venting plug 17 of bottomed cylindrical is connected to the inner peripheral portion of cylindric snorkel P3.This implementation
In mode, in the inner peripheral portion from the venting plug 17 to the peripheral surface of end side more posteriorly than front end rear end face, along the circumferential direction etc.
Alternately form the gas vent 17A that multiple (three) are open to above-mentioned space E.That is, one end of gas vent 17A is to venting plug 17
Inner circumferential opening, the other end is open to the link position of front end rear end face and the middle part peripheral surface of venting plug 17.This implementation
The gas vent 17A of mode is tilted in a manner of with towards the peripheral side of tool body 1 and towards rear end side.In addition, from this
The inner peripheral portion of venting plug 17 is also formed with diameter of the diameter than gas vent 17A to the front end face of the venting plug 17 vertical with axes O
Small gas vent 17B.That is, one end of gas vent 17B is open to the inner circumferential of venting plug 17, front end face of the other end to venting plug 17
Opening.Also, gas vent 17B is tilted in a manner of with towards the peripheral side of tool body 1 and towards front end side.Gas vent
17B has the function of that the remaining soil sand of 2 inner peripheral portion of pilot drill bit is discharged.
By this digging tool excavated the present invention method for digging a kind of embodiment in, from excavating gear
The hitting power and thrust to axes O direction front end side of pilot drill bit 2 are assigned from pilot drill bit side bearing surface 4 by excavating pipe P1
It is transmitted to casing 13 by the casing side bearing surface 14 of cannula tip 13B, and is bored from pilot drill bit side contacts face 5 by ring-type
Rostral contact surface 10 is transmitted to ring bit 3.As a result, by being implanted into and being set to the front end face of pilot drill bit 2 and ring bit 3
Excavation blade 9 form excavated hole, and casing 13 is inserted in the excavated hole.Also, assign pilot drill bit 2 surrounds axis
The rotary force of O is also transmitted to ring bit 3 from pilot drill bit side contacts face 5 by ring bit side contacts face 10.
Also, in this way formed excavated hole while, from rear end side to excavate pipe P1 and as feed pipe P2 casing 13 it
Between water route F in supply excavate water.Excavation water in present embodiment is the clear water such as tap water.In present embodiment, in this way
Supply excavates water from the bottom for flowing into excavated hole to above-mentioned a part of groove portion 6A of the pilot drill bit 2 of the front opening of water route F
The bottom is simultaneously filled up by portion, excavates water and flows through the connectivity slot 8 being connected to the front end of a part of groove portion 6A and as guide bores
First 2 rotation reaches remaining groove portion 6B while being involved in landwaste, and the discharge path 7 by being connected to residue groove portion 6B flows into
Than the 17 front end rear end face of venting plug more posteriorly in the above-mentioned space E of end side of 2 inner peripheral portion of pilot drill bit, to be filled to
Gas vent 17A is compared to more posteriorly end side.
Moreover, with the above-mentioned compressed air being supplied in snorkel P3 by the inner peripheral portion of venting plug 17 from gas vent
17A sprays, and the excavation water for being contaminated with landwaste of the rear end side of filling to gas vent 17A in this way passes out to rear end side and is discharged.
Also, the front end for the above-mentioned space E for excavating water has been discharged in this way becomes negative pressure, therefore remains on discharge path from remaining groove portion 6B
Excavation water in 7 sucks the front end of space E together with landwaste.In this way, excavation water and landwaste pass through the pressure from gas vent 17A
The ejection of contracting air and be continuously discharged.
In this way, according to the digging tool and method for digging of above structure, can in the case where not needing vacuum pump etc.,
Compressed air of hitting power etc. is assigned using the pilot drill bit 2 and ring bit 3 as described above for tool body 1 and is arranged
Go out to be contaminated with the excavation water of landwaste.By the space E between excavating pipe P1 and snorkel P3, i.e., water is excavated due to discharge
Make to be contaminated with landwaste, discharge failure will not be incurred.Therefore, it is possible to long-time stable be effectively performed low cost excavation and
The discharge of landwaste.
Also, the compressed air for assigning hitting power is discharged to above-mentioned space E towards rear end side and be used to be discharged
It is contaminated with the excavation water of landwaste, therefore the compressed air will not be to leaking out around excavated hole, and is filled out in the bottom of excavated hole
Filled with excavation water, therefore the avalanche caused by the strength reduction of laccolite around will not occur.Moreover, excavating water also by digging
It digs pipe P1 and is supplied as the water route F between the casing 13 of feed pipe P2, therefore as water is excavated, proportion ratio can be used
The low clear water as described above of the proportion of slime water etc., the compressed air sprayed from gas vent 17A will not be required it is necessary with
On pressure.
Also, in present embodiment, gas vent 17A is with towards the peripheral side of tool body 1 and towards rear end side
Mode tilts, therefore the compressed air by being discharged from gas vent 17A, can by the E of space landwaste and excavate water it is further
Reliably it is discharged to rear end side.Moreover, in present embodiment, pipe P1 is excavated in this way and is inserted through the casing 13 as feed pipe P2
Interior, water route F is formed in these and excavates between pipe P1 and casing 13 (feed pipe P2), so as to which present embodiment to be suitable for
It forms excavated hole and casing 13 is built in the basic pile-driving method of excavated hole.In other words, excavate water by water route F only
It is supplied to the front end side of tool body 1.Therefore, it is possible to prevent the avalanche of excavated hole itself, and it can will excavate water reliably
It is supplied to the bottom of the excavated hole of 1 front end of tool body and landwaste is discharged.
Also, insert is excavated pipe P1 and is supplied to the water route F between casing 13 and excavation pipe P1 in this way in casing 13
Water is excavated, while in the present embodiment, in the pilot drill bit 2 of the tool body 1 for the front end for being installed on excavation pipe P1
Front end periphery, interval spaced apart in the circumferential direction and be formed with from the front end face of the pilot drill bit 2 backward end side extend it is a plurality of
Groove portion 6, a portion groove portion 6A are connected to above-mentioned water route F, and residue groove portion 6B is arranged with water is excavated by discharge path 7
The above-mentioned space E connections gone out.Moreover, the front end of these a part of groove portion 6A and remaining groove portion 6B are by being formed in pilot drill bit
The connectivity slot 8 of 2 front end face is connected to, therefore can be by the front end face by being implanted into and being set to pilot drill bit 2 and ring bit 3
Excavation blade 9 generate landwaste equably take in connectivity slot 8 and with excavate water together be reliably discharged.
Moreover, in present embodiment, pilot drill bit 2 and ring bit 3 are configured to, and pass through the pilot drill bit side of conical surface-shaped
Closely sealed between contact surface 5 and ring bit side contacts face 10 and rotated integrally around axes O.Therefore, in these pilot drill bits 2
Between ring bit 3, it can prevent from supplying from the position other than above-mentioned a part of groove portion 6A to excavated hole and excavate water, or
It prevents that the excavation water for including landwaste is discharged from the position other than above-mentioned remaining groove portion 6B.As a result, it is possible to as described above
The excavation water comprising landwaste that further reliably discharge is taken in by connectivity slot 8.
In addition, in above first embodiment, as described above in the multiple of the front end periphery for being formed in pilot drill bit 2
In groove portion 6, by the front end for a part of groove portion 6A being connected to water route F and the remaining slot being connected to space E by discharge path 7
The front end of portion 6B is connected to by connectivity slot 8, but as Fig. 5 to the 2nd embodiment shown in Fig. 8, can also be in tool master
The inner circumferential side of the groove portion 6 of the 2 front end periphery of pilot drill bit of body 1 forms hole portion 18 and is used as discharge path 7, and by the hole portion 18 and slot
The front end in portion 6 is connected to by connectivity slot 19.In addition, in these Fig. 5 to Fig. 8, for implementing with the shown in Fig. 1 to Fig. 4 the 1st
The common part mark the same symbol of mode simultaneously omits the description.
That is, in the 2nd embodiment, it (is three in present embodiment to be formed in a plurality of of the front end periphery of pilot drill bit 2
Article) groove portion 6 identically as a part of groove portion 6A of the 1st embodiment to the front end rear end face of pilot drill bit 2 opening, and
And the water route F excavated between pipe P1 and casing 13 (feed pipe P2) is connected to.On the other hand, in the front end of pilot drill bit 2,
It is formed with from the front end of the pilot drill bit 2 towards in pilot drill bit 2 on the position of the separate axes O of the inner circumferential side of each groove portion 6
Circumference penetrates through and section is circular above-mentioned hole portion 18.Hole portion 18 is extended parallel to axes O, and the front end side end of hole portion 18 exists
The inner peripheral surface opening of drill bit 2 is formerly led in the front face open of pilot drill bit 2, rear end side end.
Moreover, the front end of these hole portions 18 is connected to the front end of groove portion 6 by connectivity slot 19, the connectivity slot 19 with
Relative to the axes O radially radiated entend in the vertical plane of axes O.Also, in the inner peripheral portion for being contained in pilot drill bit 2
Venting plug 17 major diameter front end, the recess 17C that the periphery of the front end is penetrated through along axes O direction is respectively formed in circumference
Between multiple (three) gas vent 17A on direction.
In this 2nd embodiment, the excavation water supplied from water route F flows to the elder generation of tool body 1 also by each groove portion 6
2 front end side of drill bit is led, landwaste is then involved in when flowing through connectivity slot 19 and reaches the front end of hole portion 18, elder generation is flowed into from the hole portion 18
It leads the inner peripheral portion of drill bit 2 and is filled into compared with the gas vent 17A of venting plug 17 more posteriorly end side from recess 17C.Moreover, passing through
Compressed air is discharged from gas vent 17A, the excavation water release for being contaminated with landwaste is discharged to rear end side, and from hole portion 18
The new excavation water for being contaminated with landwaste of sucking.
In this way, the digging tool of above-mentioned 2nd embodiment and using in the method for digging of the digging tool, also with the 1st
Embodiment in the same manner, can not need vacuum pump etc. and need not make compressed air be high pressure in the case of, prevent week
The avalanche of country rock disk, and can stably and effectively carry out the excavation of low cost.Also, in the 2nd embodiment, even if
The quantity for the groove portion 6 that the front end of pilot drill bit 2 is formed is identical as the quantity of groove portion 6 of the 1st embodiment, also due to can be to
The front end side supply of tool body 1 is more to excavate water, and can shorten and be involved in the excavation water of landwaste and flow through connectivity slot 19
Distance, therefore the 2nd embodiment is also applied for carrying out the case where high speed is excavated.
Industrial availability
Digging tool and method for digging according to the present invention can be effectively discharged out mixed without using vacuum pump
The miscellaneous water for having landwaste, therefore the present invention is suitable for basic pile-driving method.
Symbol description
1 tool body
2 pilot drill bits
3 ring bits
4 pilot drill bit side bearing surfaces
5 pilot drill bit side contacts faces
6 groove portions
A part of groove portions of 6A
6B residue groove portions
7 discharge paths
8,19 connectivity slot
9 excavation blades
10 ring bit side contacts faces
13 casings
14 casing side bearing surfaces
17 venting plugs
17A gas vents
17C recesses
18 hole portions (discharge path)
P1 excavates pipe
P2 feed pipes
P3 snorkels
The axis of O tool bodies 1
F water routes
E excavates the space between pipe P1 and snorkel P3
Claims (6)
1. a kind of digging tool, which is characterized in that
The inner circumferential insert that the excavation pipe of tool body is equipped in front end has the snorkel of supply compressed air, and above-mentioned
The periphery for excavating pipe is provided with the water route for being supplied to the front end of above-mentioned tool body and excavating water,
Be formed with discharge path in the front end of above-mentioned tool body, the landwaste which is used to generate when will excavate with from above-mentioned
The above-mentioned excavation water of water route supply is discharged to together in the space between above-mentioned excavation pipe and above-mentioned snorkel,
It is formed with the gas vent to above-mentioned space openings in the front end of above-mentioned snorkel.
2. digging tool according to claim 1, which is characterized in that
Above-mentioned gas vent tilts in a manner of with towards the peripheral side of above-mentioned tool body and towards rear end side and to above-mentioned sky
Between be open.
3. digging tool according to claim 1 or 2, which is characterized in that
Above-mentioned excavation pipe is inserted through the inner circumferential of feed pipe, and above-mentioned water route is formed between above-mentioned feed pipe and above-mentioned excavation pipe.
4. digging tool according to any one of claim 1 to 3, which is characterized in that
It is formed with from the front end of the tool body a plurality of groove portion that end side extends backward in the front end periphery of above-mentioned tool body,
In these a plurality of groove portions, a part of groove portion is connected to above-mentioned water route, and remaining groove portion is connected to above-mentioned discharge path,
The front end of the front end of above-mentioned a part of groove portion and above-mentioned remaining groove portion is by being formed in the front end of above-mentioned tool body
The connectivity slot in face is connected to.
5. digging tool according to any one of claim 1 to 3, which is characterized in that
It is formed with groove portion in the front end periphery of above-mentioned tool body, end side extends the groove portion backward from the front end of the tool body
And be connected to above-mentioned water route, and
It is formed in the above-mentioned tool body of side more inner than the groove portion as above-mentioned discharge path from the tool body
The front end hole portion that end side extends backward,
The front end of the front end of above-mentioned groove portion and above-mentioned hole portion is by being formed in the connectivity slot of the front end face of above-mentioned tool body
Connection.
6. a kind of method for digging, which is characterized in that
Using the digging tool described in any one of claim 1 to 5, while forming excavated hole using above-mentioned tool body,
It is supplied to the front end of above-mentioned tool body by above-mentioned water route and excavates water,
The landwaste generated when excavating is discharged to above-mentioned excavation pipe together with above-mentioned excavation water by above-mentioned discharge path to send with above-mentioned
In space between tracheae,
After will drain to the above-mentioned landwaste in the space and excavating water by being discharged to from the compressed air that above-mentioned gas vent is discharged
End side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016008874A JP2017128920A (en) | 2016-01-20 | 2016-01-20 | Drilling tool and excavation method |
| JP2016-008874 | 2016-01-20 | ||
| PCT/JP2016/086558 WO2017126247A1 (en) | 2016-01-20 | 2016-12-08 | Excavation tool and excavation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108291429A true CN108291429A (en) | 2018-07-17 |
Family
ID=59362448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680071232.3A Pending CN108291429A (en) | 2016-01-20 | 2016-12-08 | Digging tool and method for digging |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190003261A1 (en) |
| EP (1) | EP3406841A4 (en) |
| JP (1) | JP2017128920A (en) |
| CN (1) | CN108291429A (en) |
| WO (1) | WO2017126247A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6447741B2 (en) | 2016-08-09 | 2019-01-09 | 三菱マテリアル株式会社 | Drilling tools |
| WO2021090148A1 (en) * | 2019-11-06 | 2021-05-14 | Flexidrill Limited | Hybrid drill bit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0072072B1 (en) * | 1981-08-07 | 1986-05-14 | Cledisc International B.V. | Drilling device |
| CN1110374A (en) * | 1994-04-14 | 1995-10-18 | 石油大学(华东) | Underground booster |
| CN101191405A (en) * | 2006-11-28 | 2008-06-04 | 佟功喜 | Rotary digging drilling machine jet flow reverse circulation rock drilling technique |
| CN202300256U (en) * | 2011-10-09 | 2012-07-04 | 中信重工机械股份有限公司 | Slurry discharge device for power head drilling machine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807514A (en) * | 1972-08-10 | 1974-04-30 | J Murrell | Drilling apparatus |
| US5407021A (en) * | 1993-04-08 | 1995-04-18 | Sandvik Rock Tools, Inc. | Down-the-hole hammer drill having reverse circulation |
| JPH07217381A (en) * | 1994-01-31 | 1995-08-15 | Tone Corp | Driving device of small-caliber pipe |
| JP2003161092A (en) * | 2001-11-28 | 2003-06-06 | Sumiko Consultant Kk | Test boring method and its apparatus |
| JP2006336266A (en) * | 2005-06-01 | 2006-12-14 | Akira Uenishi | Multiple pipe boring system |
| JP2007170087A (en) | 2005-12-22 | 2007-07-05 | Koken Boring Mach Co Ltd | Excavating device |
| JP4983762B2 (en) * | 2008-09-26 | 2012-07-25 | 三菱マテリアル株式会社 | Drilling tools |
| SE533272C2 (en) * | 2008-12-18 | 2010-08-03 | Sandvik Intellectual Property | Drilling tool for striking rock drilling and consumable kits, ring drill bit and impact shoe for this |
| JP5783561B2 (en) * | 2011-07-28 | 2015-09-24 | ケミカルグラウト株式会社 | Excavation apparatus and excavation method |
| JP5983475B2 (en) * | 2013-03-14 | 2016-08-31 | 三菱マテリアル株式会社 | Drilling tools |
| JP6307979B2 (en) * | 2014-03-31 | 2018-04-11 | 三菱マテリアル株式会社 | Drilling tools |
-
2016
- 2016-01-20 JP JP2016008874A patent/JP2017128920A/en active Pending
- 2016-12-08 US US16/065,448 patent/US20190003261A1/en not_active Abandoned
- 2016-12-08 EP EP16886486.6A patent/EP3406841A4/en not_active Withdrawn
- 2016-12-08 CN CN201680071232.3A patent/CN108291429A/en active Pending
- 2016-12-08 WO PCT/JP2016/086558 patent/WO2017126247A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0072072B1 (en) * | 1981-08-07 | 1986-05-14 | Cledisc International B.V. | Drilling device |
| CN1110374A (en) * | 1994-04-14 | 1995-10-18 | 石油大学(华东) | Underground booster |
| CN101191405A (en) * | 2006-11-28 | 2008-06-04 | 佟功喜 | Rotary digging drilling machine jet flow reverse circulation rock drilling technique |
| CN202300256U (en) * | 2011-10-09 | 2012-07-04 | 中信重工机械股份有限公司 | Slurry discharge device for power head drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| US20190003261A1 (en) | 2019-01-03 |
| JP2017128920A (en) | 2017-07-27 |
| EP3406841A4 (en) | 2019-09-25 |
| EP3406841A1 (en) | 2018-11-28 |
| WO2017126247A1 (en) | 2017-07-27 |
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| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20200825 |