Tip-expanding sidewall cutting device and end-expanding bite bolt

Abstract

To provide a tip-expanding sidewall cutting device 16 as follows: cylindrical in shape, having a male thread on the outside of one end and a fluid pressure chuck 17 on the inside of the other end that expands and contracts with fluid pressure, having a through hole from the center of the circle at one end to a connection of the fluid pressure chuck 17 and a cutting high hardness process on the outside of the other end with the tip divided into several equal parts in the longitudinal direction.SOLUTION: The fluid pressure chuck 17 expands as fluid enters widening the surface processed with the cutting hardness, and when the fluid is sucked out, the fluid pressure chuck 17 contracts in an open / close motion. The interaction among a rotary coupling 10 with an external pipe inlet, a drive shaft 11 with the through hole, a chuck 14 for the drill cone and the tip-expanding sidewall cutting device 16 sends the fluid to the leading edge of the center of a rotor to open and close the tip.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] In the field of post-installed anchors, the quality of the construction technique has a significant impact on the strength and durability of the anchor bolt. [Background technology]

[0002] The Sasago Tunnel ceiling collapse accident in December 2012 is still fresh in our memories. That accident shattered the myth of chemical-hardening anchors.

[0003] There are two main methods for installing post-installed anchors. There are two types: a driving-in type and a chemical hardening anchor type.

[0004] The driving method involves drilling a pilot hole with a drill bit, inserting the anchor bolt into the pilot hole, driving in a pin or ball, and expanding the area near the tip of the anchor so that it bites into the wall of the pilot hole and is fixed in place.

[0005] With the chemical anchor method, pilot holes are drilled with a drill bit, chemical solution is injected into the holes, a cut-to-size bolt is inserted, and the solution hardens through a chemical reaction, increasing the strength of the anchor. The Sasago Tunnel was an anchor of this type.

[0006] Patent application No. 2003-340526 concerns a post-installed anchor construction method.

[0007] Patent application No. 2016-216710 describes an expansion anchor. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5419192 This is a patent owned by me. [Patent Document 2] Patent No. 7004961 This is a patent owned by me. [Patent Document 3] Patent No. 7030297 This is a patent owned by me. [Patent Document 4] Patent No. 7030298 This is a patent owned by me. Summary of the Invention [Problem to be solved by the invention]

[0009] The good thing about the drive-in type is that you can drill a pilot hole, drive the bolt in, and then work is done, and you can immediately fix the equipment. The bad thing is that it is driven in forcefully with a hammer, which can destroy the surrounding area and weaken the strength.

[0010] Chemically hardening anchors are made by drilling pilot holes, injecting the agent into the holes, inserting the anchor bolt, and waiting a certain amount of time for the agent to harden. The advantage of chemically hardening anchors is that they do not require you to drive them in with a hammer or other tool, so there is no risk of damaging the surrounding area. The disadvantage is that it takes time to harden, and even the slightest movement during that time can result in poor application. It becomes impossible to guarantee the strength.

[0011] We applied for patent number 7004961 with the goal of developing an anchor bolt that combines the advantages of the hammering method and the chemical curing method, while also improving the adhesive strength. However, we discovered that this method takes time to complete the excavation and remove the drill bit for the horizontal hole drilling machine. In order to make the removal process smoother, we had to reconsider the excavation method. [Means for solving the problem]

[0012] In this book, we have differentiated between "hole" and "pore". A hole that goes all the way through is called a "through hole", a hole that does not go all the way through is called a "blind hole", and a blind hole that widens at the back is called a "blind hole with a wider end". In Patent No. 7004961, after drilling a blind hole for an anchor bolt, an auxiliary drilling base is installed in the blind hole, and then a drill bit for a horizontal hole drilling machine is lowered while rotating to drill a divergent blind hole for an anchor bolt. During this process, there were several cases where the auxiliary drilling base and the drill bit for the horizontal hole drilling machine were too closely interlocked. This invention uses a different method to process the blind hole into a divergent blind hole. The tip-expanding type sidewall cutting device is a device for expanding and cutting the tip sidewall of a cut blind hole into a diverging blind hole, and is composed of an electric drill with a through hole, a vibration drill with a through hole, a through hole processed drill, and a tip-expanding type sidewall cutting machine, the electric drill with a through hole includes an external pressure supply type electric drill with a through hole and a pressure self-generating type electric drill with a through hole, the external pressure supply type electric drill with a through hole includes a rotary coupling with an external piping inlet, a drive shaft with a through hole, a motor rotor, a fan, and a chuck for a drill bit, the pressure self-generating type electric drill includes the drive shaft with a through hole, the motor rotor, a press-in / suction twin fan, a press-in / suction switching lever, a suction filter, a filter inspection port, the through hole, and a chuck for a drill bit, the vibration drill with a through hole includes an external pressure supply type vibration drill and a pressure self-generating type vibration drill, the external pressure supply type vibration drill includes a motor rotor and a fan on a drive shaft, and a through hole self-generating type electric drill includes a ... a motor rotor, a press-in / suction twin fan, a press-in / suction switching lever, a suction filter, a filter inspection port, the through hole, and a chuck for a drill bit, a drive shaft having a rotary coupling with an external piping inlet, a through hole and a drill bit chuck, and the pressure self-generating vibration drill has the drive shaft, the motor rotor, a press-in / suction twin fan, a press-in / suction switch lever, a suction filter, a filter inspection port and the drill bit chuck, and the through-hole machined drill bit is an ironworking drill bit having an external thread for the drill bit chuck at one end and a through hole from the center of the one end to the other end, the tip expandable sidewall cutting machine is cylindrical, has an external thread connected to the drill bit chuck at the outside of one end and has a fluid pressure chuck on the inside of the other end, has a through hole from the center of the circle at the one end to the fluid pressure chuck connection part and has a hardened surface on the outside of the other end, the tip is divided into several equal parts in the longitudinal direction, and when pressure is applied through the drill bit chuck, the fluid pressure chuck expands and spreads the outside of the other end from the inside, and presses the hardened surface against the side wall of a blind hole. When the electric drill with through holes or the external pressure supply type vibration drill with through holes starts to rotate, the hardened cutting surface cuts the side wall of the blind hole more widely. After the cutting is completed, the fluid is sucked from the driving shaft with through holes of the electric drill or the driven shaft with through holes of the vibration drill, and the pressurized part of the fluid pressure chuck 17 is sucked in, and the fluid pressure chuck contracts and the tip expansion type side wall cutting machine returns to its original state.When fluid enters the fluid pressure chuck, it expands, pushing the hardened cutting surface apart, and when the fluid is sucked in, the fluid pressure chuck contracts, performing an opening and closing action. The interaction between the rotary coupling with external piping inlet, the drive shaft with a through hole, the drill bit chuck, and the tip-expanding sidewall cutting machine sends fluid to the tip at the center of the rotating body, opening and closing the tip, which is the invention of this invention.

[0013] The divergent expansion biting bolts inserted into the divergent blind holes are comprised of three types: pin expansion bolts, spring expansion bolts, and tip expansion bolts. Any one of these bolts is used and then installed by injecting a hardener. Effect of the Invention

[0014] It achieves a level of strength that was not possible with conventional hammer-in anchors or chemically hardened anchors, and the open clip prevents the strength from decreasing even with age.

[0015] The safety of the installed anchors is also improved significantly.

[0016] The divergent expansion biting bolt inserted into the divergent blind hole is characterized in that it can be used immediately after hardener is injected into it. [Brief description of the drawings]

[0017] [Figure 1] Current anchor bolt installation image [Diagram 2] Tip expansion type side wall cutting machine open / closed state image [Diagram 3] Image of an electric drill with external pressure supply and through-hole, a chuck for drill bits (with through-hole and internal thread processing) and a drill bit with through-hole processing [Figure 4] External pressure supply type electric drill with through hole and tip expandable side wall cutting machine open / closed state image [Diagram 5] External pressure supply type driven shaft vibration drill with through hole and chuck for drill bit (with through hole and internal thread processing) Image of through hole processing in chuck part [Figure 6]Pressure self-generating through-hole electric drill and tip expandable side wall cutting machine Press-in twin fan rotation tip expandable side wall cutting machine expansion opening image [Figure 7] Pressure self-generating electric drill with through hole and tip expandable side wall cutter switch lever operated, suction twin fan rotation for suction, tip expandable side wall cutter contracted and closed image [Figure 8] Pressure self-generating through-hole vibrating drill and tip-expanding sidewall cutting machine with twin fan rotation for tip-expanding sidewall cutting machine expansion and opening image [Figure 9] Pressure self-generating through-hole vibrating drill and tip-expanding side wall cutting machine. After operating the switch lever, the suction twin fan rotates to suck, and the tip-expanding side wall cutting machine shrinks and closes. [Figure 10] Construction method of the wide-head expansion bolt 1) Image of the pin driving method [Figure 11] 2) Spring expansion bolt construction method image [Figure 12] End-expansion bolt installation method 3) Tip expansion bolt installation method image [Explanation of symbols]

[0018] 1. Electric drill with external pressure supply and through hole 2 Cross-section of blind hole 3 Drive-in anchor bolts 4. Hammer 5 Threaded round bar 6. Chemical solution for anchor bolts 7 Cross-section of the divergent hole 8. Conventional Awl 9 Pre-drilled drill bit 10 Rotating coupling with external piping inlet 11 Drive shaft with through hole 12 Motor rotor 13 Fan 14 Drill chuck (with through hole and internal thread) 15 Pressure self-sealing electric drill with hole 16 Tip-expanding sidewall milling machine 17 Fluid pressure chuck (expansion / contraction part) 18 Press-fit suction twin fan 19 Press-fit / suction switching lever 20 Suction filter 21 Filter replacement port 22 Filter inspection hatch 23 External pressure supply type through hole vibration drill 24 Drive shaft (no through hole) 25 Drive transmission gear 26 Driven shaft oscillating gear 27 Vibration driven shaft (without through hole) 28 Driven shaft with through hole 29 Pressure self-sharpening through-hole vibratory drill 30 pin extension bolt 31 Drive pin 32 Base pedestal 33 Long bolt for base pedestal 34 Base base long bolt tightening nut 35 Spring expansion bolt 36 Coil spring 37 Torsion coil spring 38 Wire-bent coil springs 39 Plate coil spring 40 Tip expansion bolt 41 Expansion / contraction tip 42 Tip lock stay DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figure 1 shows an image of current anchor bolt installation. First, use an electric drill to drill a blind hole 2. This will open a blind hole 2 as shown in the cross-sectional view of the blind hole 2. Insert an anchor bolt 3 into the blind hole. Drive in the driving pin with a hammer 4. As the pin is inserted, the anchor expands and makes strong contact with the side wall. In the case of a drive-in type anchor, the anchor bolt 3 expands and makes contact with the side wall, resulting in strong contact force. In this case, once construction is complete, the anchor is ready for use immediately.

[0020] Similarly, the threaded round bar 5 in Figure 1 is an image of the conventional chemical injection type anchor bolt installation. First, a blind hole 2 is drilled with a rotating drill. A blind hole is drilled as shown in the cross-section of the blind hole. Chemical solution 6 for the anchor bolt is injected into the blind hole 2, the threaded round bar 5 is inserted, and the hardener is allowed to harden. The wait time may be one to an hour depending on the chemical. This waiting time is a drawback of the chemical injection installation method. At the bottom of Figure 1 are the cross-section of the blind hole 2, the cross-section of the divergent blind hole 7, and an image of the installation method of Patent No. 7004961.

[0021] Figure 2 shows an image of the tip-expanding sidewall milling machine 16 in the open and closed states. The tip expandable sidewall milling machine 16 is cylindrical, has a male thread on the outside of one end, and has a fluid pressure chuck 17 on the inside of the other end that expands and contracts with fluid pressure. A through hole is provided from the center of the circle of the one end to the connection part of the fluid pressure chuck 17. The outside of the other end is machined and hardened, and the tip is divided into several equal parts in the longitudinal direction. The rotary coupling 10 with external piping inlet passes fluid through the drive shaft 11 with a through hole of the electric drill or the driven shaft 28 with a through hole of the vibration drill even while rotating, and when pressure is applied through the chuck 14 for drill bit, the fluid pressure chuck 17 expands and spreads the outside of the other end from the inside, pressing the hardened surface against the side wall of the blind hole 2. When the electric drill 1 with a through hole or the external pressure supply type vibration drill 23 with a through hole starts to rotate, the hardened surface cuts the side wall of the blind hole 2 more widely. After cutting is completed, fluid is sucked from the electric drill's through-hole drive shaft 11 or the vibratory drill's through-hole driven shaft 28, and when the pressurized portion of the fluid pressure chuck 17 is sucked, the fluid pressure chuck 17 contracts and the tip expandable sidewall cutter 16 returns to its original state. Fluid enters the fluid pressure chuck 17 and expands, pushing and spreading the cut high-hardness processing surface, and when the fluid is sucked in, the fluid pressure chuck 17 performs an opening and closing operation of contracting. The interaction between the rotary coupling with external piping inlet 10, the through-hole drive shaft 11, the drill bit chuck 14 and the tip expandable sidewall cutter 16 sends fluid to the tip of the center of the rotating body, opening and closing the tip, which is the invention of this invention.

[0022] FIG. 3 shows a pressure external supply type electric drill 1 with a through hole, a chuck for a drill bit (through hole and This is an image of the drill bit 14 (with internal thread processing) and the drill bit 9 with a through hole. The pressure external supply type electric drill with through hole 1 has a rotary coupling with external piping inlet 10, a drive shaft with through hole 11, a motor rotor 12, a fan 13 and a chuck for drill bit 14. As a method of feeding fluid to the tip of the rotating shaft, a through hole is provided in the center of the drive shaft of the motor from one end to the chuck for drill bit via the other end, and the rotary coupling with external piping inlet 10 is attached to the through hole part of one end, and the drive shaft with through hole 11 receives fluid even while rotating. A drill bit with through hole 9 is attached to the chuck for drill bit 14 of the pressure external supply type electric drill with through hole 1, and while rotating the pressure external supply type electric drill with through hole 1, it is inserted into the divergent blind hole part 7, the pressure pump is rotated, the fluid is discharged from the chuck for drill bit 14, the pressure pump is stopped, the suction pump is started, and the fluid is sucked. The drill bit with through hole 9 is used to clean the blind hole part 2 and the divergent blind hole part 7.

[0023] Figure 4 shows an image of the external pressure supply type through-hole electric drill 1 and the tip expandable side wall cutting machine 16 in the open and closed states. The external pressure supply type electric drill with a through hole 1 has a rotary coupling 10 with an external piping inlet, a drive shaft with a through hole 11, a motor rotor 12, a fan 13, and a drill chuck 14 with a through hole and an internal female thread. The expandable sidewall milling machine 16 is attached to the external pressure supply type electric drill 1 with a through hole and a chuck 14 for drilling with an internal female thread. The compressor is connected to the rotary coupling 10 with an external piping inlet. The expandable sidewall milling machine 16 is inserted into the blind hole 2 and the compressor is operated to start the pressurization. The fluid passes through the rotary coupling 10 with an external piping inlet, the drive shaft 11 with a through hole, and the chuck 14 for drilling with a through hole and an internal female thread, and arrives at the tip of the expandable sidewall milling machine 16, expanding the fluid pressure chuck 17, expanding as shown in the middle drawing, and rotating the external pressure supply type electric drill 1 with a through hole while pressing the outer cutting hardness processing part against the side wall of the blind hole, cutting the side wall of the blind hole, and expanding the hole. When the blind hole becomes a divergent blind hole, the press-fitting is stopped and the suction pump is started to suck the fluid from the fluid pressure chuck 17.

[0024] FIG. 5 shows a pressure external supply type through-hole driven shaft vibration drill 23 and a drill bit chuck. (With through holes and internal threads) 14 Chuck part through hole machining image. The external pressure supply type through-hole vibration drill 23 has a drive shaft 24 and a vibration driven shaft 27. The drive shaft (without through hole) 24 side has the fan 13, motor rotor 12 and drive transmission gear 25 attached, and the through-hole driven shaft 28 side has the rotary coupling 10 with external piping inlet, the driven shaft vibration gear 26 and the through-hole and internal female threaded drill chuck 14 attached. In the vibration drill, the vibration driven shaft 27 is machined with a through hole and changes into the through-hole driven shaft 28, which is connected to the rotary coupling 10 with external piping inlet and the through-hole and internal female threaded drill chuck 14. A tip expandable side wall cutter 16 is attached to a pressure external supply type through-hole vibrating drill 23 with a through hole and a chuck 14 for drilling with an internal female thread. A compressor and a rotating coupling 10 with an external piping inlet are connected. The tip-expanding sidewall cutting machine 16 is inserted into the blind hole 2, the compressor is operated, and pressure-in begins. The fluid passes through the rotary coupling 10 with external piping inlet, the driven shaft 28 with a through hole, and the chuck for drilling with a through hole and internal female thread 14, and arrives at the tip of the tip-expanding sidewall cutting machine 16, expanding the fluid pressure chuck 17, expanding as shown in the drawing, and rotating the pressure external supply type through hole vibration drill 23 while pressing the outer cutting hardness processing part against the side wall of the blind hole, cutting the side wall of the blind hole, and expanding the hole. When the blind hole 2 becomes the end-diverging blind hole 7, pressure-in stops, the suction pump is operated, and the fluid in the fluid pressure chuck 17 is sucked.

[0025] Figure 6 shows an image of the pressure self-generating electric drill with through holes 15, the tip-expanding sidewall cutting machine 16, the press-in and suction twin fan 18, and the expansion and opening of the tip-expanding sidewall cutting machine 16. Unlike the external pressure supply type, the pressure self-generating electric drill with through holes 15 generates wind pressure and suction by itself through the rotation of the press-in and suction twin fan 18. For this reason, it is made larger than a normal fan and has a drive shaft with through holes 11, the motor rotor 12, the press-in and suction switching lever 19, the suction filter 20, a filter replacement port 21, and a filter inspection port 22, and connects the through hole of the drive shaft with through holes 11 and the through hole of the chuck for drill with internal female thread 14. When the tip expandable sidewall cutting machine 16 is attached to the through hole and the internal female threaded drill chuck 14, the tip expandable sidewall cutting machine 16 is inserted into the blind hole 2, and the pressure self-generating through-hole electric drill 15 is rotated, the press-in and suction twin fan 18 rotates, generating air pressure, which passes through the through hole of the through hole drive shaft and the internal female threaded drill chuck, reaches the tip of the tip expandable sidewall cutting machine 16, expanding the fluid pressure chuck 17, expanding as shown in the lower right diagram of the drawing, and cutting the blind hole sidewall while pressing the outer cut high hardness processed part against the blind hole sidewall, expanding the hole. When the shape of the blind hole 2 becomes the end-wide blind hole 7, the pressure self-generating through-hole electric drill 15 is stopped.

[0026] Figure 7 shows a pressure self-sharpening electric drill 15 with a hole and a tip-expanding sidewall cutting machine. After the lever suction operation, the press-in and suction twin fans rotate 18 times for suction, and the tip-expanding side wall cutting machine contracts and closes. Stop the pressure self-generating electric drill 15. Stop the press-in, switch the press-in / suction switch lever 19 to the suction side, restart the pressure self-generating electric drill 15, and the press-in / suction twin fan 18 rotates to suck in the fluid in the fluid pressure chuck 17. After suction is complete, pull out the tip-expanding sidewall cutter 16 from the divergent blind hole portion 7.

[0027] Figure 8 is an image of the start of pressing into the tip-expanding side wall cutting machine 16 with the pressure self-sustaining through-hole vibration drill 29 and the pressing / suction twin fan 18 revolutions. The pressure self-sustaining through-hole vibration drill 29 has a drive shaft 24 and a vibration driven shaft 27. On the drive shaft (without through hole) 24 side, there is a press-in / suction twin fan 18, a motor rotor 12 and a drive transmission gear 25, and on the driven shaft 28 side with a through hole, there is a driven shaft vibration gear 26 and a chuck for drill with a through hole and an internal female screw 14. In the vibration drill, the vibration driven shaft 27 is machined with a through hole and changes into the driven shaft 28 with a through hole, and is connected to the chuck for drill with a through hole and an internal female screw 14. A tip expandable side wall cutter 16 is attached to a pressure self-sharpening through-hole vibrating drill 29 with a through-hole and an internal female-threaded drill chuck 14. The tip-expanding sidewall cutter 16 is inserted into the blind hole 2, the pressure self-generating through-hole vibrating drill 29 is operated, and the press-in / suction twin fan 18 starts, and the rotation creates wind pressure and suction by itself. For this reason, it is made larger than a normal fan, and has a drive shaft (without a through hole) 24, the motor rotor 12, press-in / suction switching lever 19, suction filter 20, filter replacement port 21 and filter inspection port 22, and connects the through hole of the through-hole driven shaft 28 and the through hole of the internally female-threaded drill chuck 14. When the tip expandable sidewall cutting machine 16 is attached to the through hole and the female-threaded drill chuck 14, the tip expandable sidewall cutting machine 16 is inserted into the blind hole 2, and the pressure self-generating through-hole vibration drill 29 is rotated, the press-in and suction twin fan 18 rotates, generating air pressure, which passes through the through hole of the driven shaft 28 with a through hole and the female-threaded drill chuck, reaches the tip of the tip expandable sidewall cutting machine 16, expanding the fluid pressure chuck 17, expanding as shown in the lower right diagram of the drawing, and cutting the side wall of the blind hole while pressing the outer hardened cutting part against the side wall of the blind hole, expanding the hole. When the shape of the blind hole 2 becomes the divergent blind hole 7, the pressure self-generating through-hole vibration drill 29 is stopped.

[0028] FIG. 9 shows a pressure self-sharpening type through-hole vibrating drill 29 and a tip-expanding type side wall cutting machine 16 After operating the switch lever, the suction twin fan rotates to suck, and the tip expansion type side wall cutting machine shrinks This is an image. Continued from Figure 8. Stop the pressure self-generating through-hole vibration drill 29. Stop the press-in, switch the press-in / suction changeover lever 19 to the suction side, restart the pressure self-generating through-hole vibration drill 29, and the press-in / suction twin fan 18 rotates to suck in the fluid in the fluid pressure chuck 17. After suction is complete, pull out the tip-expanding sidewall cutting machine 16 from the divergent blind hole portion 7.

[0029] Figure 10 is an image of the pin driving method, which is a method for installing a divergent expansion bolt. The pin driving method is a method for firmly installing a pin expansion bolt 30 in a divergent blind hole 7, and includes the pin expansion bolt 30, a driving pin 31, a base base 32 with a cross notch at the top and a screw thread, a long bolt 33 for the base base, and a long bolt tightening nut 34 for the base base. The base base 32 is installed at the bottom of the divergent blind hole 7, the long bolt 33 for the base base is screwed into the base base 32, and after the screwing is completed, the pin expansion bolt 30 is inserted toward the bottom of the divergent blind hole 7 so that it covers the base base 32, and after insertion, the long bolt tightening nut 34 for the base base is screwed into the base base 32. 34 is screwed into the long bolt 33 for the base base, and when it reaches a position where the side wall of the divergent blind hole 7 bites into the tip side wall of the pin expansion bolt 30, the long bolt tightening nut 34 for the base base is removed, the long bolt 33 for the base base is removed, a liquid hardener is injected into the pin expansion bolt 30, and before the liquid hardener hardens, the driving pin 31 is driven with a hammer 4 toward the cross notch at the top of the base base 32, expanding the base base 32 in all directions and strengthening the bite into the tip side wall of the pin expansion bolt 30. The liquid hardener hardens and the installation is complete.

[0030] Fig. 11. Method of installing the diverging expansion bolt 2) Spring expansion bolt method This is an image. The spring expansion bolt method is the spring expansion bolt 35 Coil spring 36, torsion coil spring 37, wire bending processing on the inside of the tip Either a coil spring 38 or a plate coil spring 39 is attached, The spring expansion bolt 35 is set in the same position as when it is installed in the divergent blind hole 7. Insert the spring expansion bolt 35 into the divergent blind hole 7. When the spring expansion bolt 35 reaches the bottom of the divergent blind hole 7, the spring force presses the tip of the spring expansion bolt 35 against the side wall of the divergent blind hole 7, preventing it from coming out. Inject the hardening agent and drive in the drive pin to complete the installation.

[0031] Figure 12 shows the method of installing the end-wide expansion bolt. 3) End-expansion bolt 40 method This is an image diagram. The tip expansion bolt 40 method is comprised of the tip expansion bolt 40, the expansion and contraction tip 41, and the tip lock stay attached to the tip of the tip expansion bolt 40. 42 is used. The expansion and contraction tip 41 is attached to the through hole of either the pressure external supply type electric drill with through hole 1, the pressure self-generating type electric drill with through hole 15, the pressure external supply type vibration drill with through hole 23 or the pressure self-generating type vibration drill with through hole 29 and the internal female threaded drill chuck 14. When the tip expansion bolt 40 is inserted into the divergent blind hole 7, the expansion and contraction tip 41 is inserted inside the tip expansion bolt 40 and pressure fitting is started, the tip of the expansion and contraction tip 41 expands, expands the inside of the tip expansion bolt 40, presses against the side wall of the divergent blind hole, and the tip lock stay Lock 42. Contract and pull out the expansion / contraction tip 41, inject the chemical solution, and drive in the driving pin 31. Once the chemical solution has hardened, the process is complete.

Claims

[Claim 1] The tip-expanding type sidewall cutting device is a device for expanding and cutting the tip sidewall of a cut blind hole into a diverging blind hole, and is composed of an electric drill with a through hole, a vibration drill with a through hole, a drill bit with a processed through hole, and a tip-expanding type sidewall cutting machine, the electric drill with a through hole includes an external pressure supply type electric drill with a through hole and a pressure self-generating type electric drill with a through hole, the external pressure supply type electric drill with a through hole includes a rotary coupling with an external piping inlet, a drive shaft with a through hole, a motor rotor, a fan, and a chuck for a drill bit, the pressure self-generating type electric drill includes the drive shaft with a through hole, the motor rotor, a press-in / suction twin fan, a press-in / suction switching lever, a suction filter, a filter inspection port, the through hole, and a chuck for a drill bit, the vibration drill with a through hole includes an external pressure supply type vibration drill and a pressure self-generating type vibration drill, the external pressure supply type vibration drill includes a motor rotor and a fan on a drive shaft, and an external pressure supply type vibration drill includes a drive shaft with a through hole, the pressure self-generating vibration drill has the drive shaft, the motor rotor, a press-in / suction twin fan, a press-in / suction switch lever, a suction filter, a filter inspection port, and the drill bit chuck; the through-hole machined drill bit is a metalworking drill bit having a male screw for the drill bit chuck at one end and a through hole from the center of the one end to the other end; the tip expansion type sidewall cutting machine is cylindrical, has a male screw connected to the drill bit chuck at the outside of one end and a fluid pressure chuck at the inside of the other end, has a through hole from the center of the circle at the one end to the fluid pressure chuck connection part, and has a cutting high hardness processing at the outside of the other end; the tip is divided into several equal parts in the longitudinal direction; the divergent expansion biting bolt inserted into the divergent blind hole is any one of a pin expansion bolt, a spring expansion bolt, and a tip expansion bolt, and is installed by injecting a hardener. Tip expansion type side wall cutting device and divergent expansion biting bolt

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