JP2000230400A - Adapter of drilling machine and drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit air and water from the outer part of an adapter by having an attaching hole detachably inserting the base part of a hollow screw self piercing hole lock bolt in the shaft part of the adapter of a piercing machine, and having a hollow hole opened in an attaching hole through a shaft center from the outside of the shaft part of the adapter. SOLUTION: An adapter 3 is attached to a piercing machine, an adapter 4 is attached to the adapter 3 to detachably insert the base part of a self piercing hole lock bolt 5, and the hose of air or the like from a compressor is connected to a swivel pipe 41 through an auxiliary pipe 51. Air and water are transmitted from the hollow holes 40e, 5c of the adapter 4 and the self piercing hole lock bolt 5. Thereby air and water can be transmitted from the auxiliary pipe 51 to the hollow hole 40e from the outer part in simple structure, hole drilling speed is not lowered as a full feed quantity without enlarging the piercing machine even when hole drilling of weak ground or the like is performed, and the discharge of cuttings in drilling by using the self piercing lock bolt 5 can be made good.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adapter and a drilling device for a drilling machine for drilling using a self-drilling lock bolt.

[0002]

2. Description of the Related Art When concrete, stone, brick, rock, etc. are soft, the hole wall is often not self-supporting after drilling, making it impossible to pull out a drilling rod or insert a lock bolt. It becomes. Therefore, there is a case in which a rock bolt is drilled using a lock bolt to bury the lock bolt.

[0003]

In the construction of the self-drilling lock bolt, there is a method of using a self-drilling lock bolt of a hollow screw type and injecting grout material from a hollow portion to bury the hole. A self-drilling lock bolt is detachably attached to the adapter by screwing a male screw at the base of the self-drilling lock bolt to a female screw formed in the recess of the adapter.

In the construction of such a self-drilling rock bolt, air or water is sent from a hollow hole of the adapter and the self-drilling rock bolt from the drilling machine side to discharge cutting powder at the time of drilling. Time or the power of air or water is weak,
If the flow rate is low, the discharge of the cutting powder becomes poor, and as a result, adverse effects such as a decrease in the drilling speed may occur.

[0005] For this reason, it is conceivable to increase the flow rate of air or water sent from the drilling machine side. However, there is a problem that the drilling machine becomes large and the cost increases accordingly.

The present invention has been made in view of the above-mentioned circumstances, and it is not necessary to send air or water from the drilling machine side but to send the air from the outside of the adapter, so that the cutting dust when drilling using a self-drilling lock bolt is provided. It is an object of the present invention to provide a drilling machine adapter and a drilling device that improve the discharge of drilling and improve workability.

[0007]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

The invention according to claim 1 is characterized in that the adapter shaft has a mounting hole in which the base of the hollow screw type self-drilling lock bolt is removably inserted. An adapter for a drilling machine having a hollow hole that opens into the mounting hole and sends air or water from outside to the self-piercing lock bolt. ].

According to the first aspect of the present invention, the required amount of air or water for drilling a soft ground or the like is insufficient, so that drilling is difficult to be performed. Since the hollow hole passing through the shaft center from the outside of the hole was opened in the mounting hole and connected to the hollow hole of the self-drilling lock bolt, by sending from the outside of the adapter without sending air or water from the drilling machine side,
As a result of sufficient feeding amount without increasing the size of the drilling machine,
No decrease in drilling speed is observed even when drilling in soft ground, etc., and the discharge of cuttings when drilling using self-drilling lock bolts is improved, and workability is improved.

[0010] The invention according to claim 2 is characterized in that the adapter shaft portion includes a swivel tube having a communication hole communicating with the hollow hole and connected to an auxiliary tube for sending air or water from outside. The adapter of a drilling machine according to claim 1, wherein ].

According to the second aspect of the present invention, a swivel tube is provided at the adapter shaft portion, an auxiliary tube is connected to the swivel tube, and air or water can be supplied to the hollow hole from outside with a simple structure. it can.

According to a third aspect of the present invention, there is provided a method according to the first or second aspect, wherein an annular concave portion communicating with an outer opening of the hollow hole is formed on an outer periphery of the adapter shaft portion.
An adapter for a drilling machine according to claim 1. ].

According to the third aspect of the present invention, since the outer periphery of the adapter shaft portion has the annular concave portion communicating with the outer opening of the hollow hole, even if the swivel tube is displaced in the circumferential direction, the swivel tube may be displaced. Can reliably supply air and water to the hollow hole.

According to a fourth aspect of the present invention, there is provided a method as set forth in any one of the first to third aspects, wherein an annular concave portion communicating with an outer opening of the hollow hole is formed in an inner periphery of the swivel tube. An adapter for a drilling machine according to item 7. ].

According to the fourth aspect of the present invention, since the swivel tube has an annular recess in the inner periphery thereof communicating with the outer opening of the hollow hole, the swivel tube can be formed without affecting the strength of the adapter shaft. Even if there is a deviation in the circumferential direction, air and water can be reliably supplied to the hollow hole from the swivel tube.

According to a fifth aspect of the present invention, a seal member is provided at both sides of the outside opening of the hollow hole to seal between the adapter shaft portion and the swivel tube. The adapter of the drilling machine according to any one of claims 1 to 4. ].

According to the fifth aspect of the present invention, since the seal member for sealing between the adapter shaft and the swivel tube is provided at both sides of the outer opening of the hollow hole, air and water leak to the outside. And a sufficient amount of air or water can be sent to the bit at the tip of the drilling.

According to a sixth aspect of the present invention, there is provided a method as set forth in any one of the first to fifth aspects, wherein the swivel tube is mounted on the adapter shaft with buffer members disposed on both sides thereof. An adapter for a drilling machine according to claim 1. ].

According to the sixth aspect of the present invention, even when the adapter is vibrated by the drilling machine, the vibration is absorbed by the buffer, and the durability of the swivel tube is improved.

The invention according to claim 7 is characterized in that the swivel tube is attached to the adapter shaft portion by arranging a buffer on both sides of the swivel tube via washers. An adapter for a drilling machine according to any one of the preceding claims. ].

According to the present invention, even if the adapter is vibrated by the drilling machine, the vibration is absorbed by the buffer, the durability of the swivel tube is improved, and the buffer is arranged via the washer. As a result, the durability of the buffer itself is improved.

The invention according to claim 8 is characterized in that a projection is provided at a portion of the mounting hole which is in contact with the base of the self-drilling lock bolt and is subjected to a construction load. An adapter for a drilling machine according to any one of the preceding claims. 』
It is.

According to the eighth aspect of the present invention, since the adapter and the self-drilling lock bolt come into contact with each other at the convex portion of the mounting hole of the adapter, the self-drilling lock due to the working load at the time of drilling. Since the deformation of the bolt does not occur at any part or the oblique tip, it occurs between the hole of the self-drilling lock bolt and the outer shape, and it does not lead to the deformation until the adapter and the self-drilling lock bolt bite. The self-drilling lock bolt can be easily removed. In addition, it is only necessary to provide a convex portion in the mounting hole of the adapter, and it is not necessary to cut the conventional and cumbersome self-piercing lock bolt, so that the processing cost of the self-piercing lock bolt can be reduced.

According to a ninth aspect of the present invention, a hollow screw type self-drilling lock bolt base is removably inserted into a drilling machine via an adapter, and air or water is removed from the hollow hole of the self-drilling lock bolt. In the drilling device for feed drilling, the base of a hollow screw type self-drilling lock bolt is detachably attached to the adapter of the drilling machine via the adapter according to any one of claims 1 to 7. A drilling device characterized by the above-mentioned. ].

According to the ninth aspect of the present invention, by sending air or water from the outside of the adapter without sending air or water from the drilling machine side, the ability to send air such as a compressor without increasing the size of the drilling machine or the pump. The ability to supply water and the necessary amount of air for drilling soft ground can be increased, and the drilling speed does not decrease even when drilling soft ground. When drilling using a perforated lock bolt, the discharge of cuttings is improved, and workability is improved.

According to a tenth aspect of the present invention, a hollow screw type self-drilling lock bolt base is detachably inserted into a drilling machine via an adapter, and air or water is removed from the hollow hole of the self-drilling lock bolt. In a drilling machine for feed drilling, an adapter directly attached to the adapter of the drilling machine,
A drilling device using the adapter according to any one of claims 1 to 7. ].

According to the tenth aspect of the present invention, by sending air or water from the outside of the adapter directly attached to the drilling machine without sending air or water from the side of the drilling machine, the air of the compressor or the like can be increased without increasing the size of the drilling machine. The ability to send water or water from a pump etc. is increased, so that air and water can be sent in the required amount for drilling soft ground, etc., and the drilling speed decreases even when drilling on soft ground. Can not be seen,
When drilling holes using the self-drilling lock bolts, it is possible to improve the discharge of the cutting powder and improve the workability.

According to an eleventh aspect of the present invention, there is provided a method as described above, wherein the mounting load is brought into contact with at least one of the mounting hole in which the base of the self-piercing lock bolt of the adapter is removably inserted and the base of the self-piercing lock bolt. The drilling device according to claim 9, wherein a convex portion is provided in such a portion. ].

According to the eleventh aspect of the present invention, since the adapter and the self-drilling lock bolt come into contact with each other at the protruding portion, the deformation of the self-drilled lock bolt due to the load applied during drilling is reduced to any part. It does not occur at the part of the self-drilling lock bolt, but at the outside, and does not lead to deformation until the adapter and the self-drilling lock bolt bite. Easy to do.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a drilling machine adapter and a drilling machine according to the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a side view of a drilling machine, FIG. 2 is a sectional view showing an assembled state of an adapter to be mounted on a drilling machine, a self-drilling lock bolt, and an adapter for connecting these.
Fig. 4 is an exploded view in which the adapter to be attached to the drilling machine, the self-piercing lock bolt, and the adapter for connecting them are respectively disassembled and a half section is shown. Fig. 4 shows the adapter to be mounted on the drilling machine and the adapter for connecting the self-piercing lock bolt. FIG. 5 is an exploded view in which an adapter attached to a drilling machine and an adapter for connecting a self-drilling lock bolt are respectively disassembled and halved in cross section.

The drilling device 1 is provided with a drilling machine 2, an adapter 3 is attached to the drilling machine 2, and a hollow screw type self-drilling lock bolt 5 is attached to the adapter 3 via another adapter 4. Is detachably inserted. The tip portion 5b of the self-drilling lock bolt 5 is provided with a blade 6.

The adapter 3 is detachably mounted by inserting one end of the adapter shaft 3a into the drilling machine 2. At the other end of the adapter shaft 3a, a mounting portion 3b is formed, and a mounting hole 3c is formed in the mounting portion 3b. A female screw 3d is formed in the mounting hole 3c.

The adapter shaft 40 of the adapter 4 includes:
A swivel pipe 41 is attached by a pair of buffer bodies 42 and 43. The shock absorbers 42 and 43 are formed of a material such as plastic or rubber having a shock absorbing effect, and greatly reduce the impact due to the impact on the swivel tube 41 when drilling, thereby improving the durability of the swivel tube 41. Can be.

One end of the adapter shaft 40 has a male screw 4
0a is formed, and a mounting portion 40b is formed at the other end, and a mounting hole 40c is formed in the mounting portion 40b.
A female screw 40d is formed in the mounting hole 40c. Further, a hollow hole 40e is formed in the adapter shaft portion 40, and the hollow hole 40e passes through the axis from the outside of the adapter shaft portion 40 and opens to the mounting hole 10c.

In the mounting hole 40c of the adapter shaft 40,
The base 5a of the self-piercing lock bolt 5 is removably inserted. A hollow hole 5c is formed in the self-drilling lock bolt 5, and this hollow hole 5c communicates with a discharge hole 6a of a blade portion 6 provided at a distal end portion 5b.

The outer periphery of the adapter shaft portion 40 has a hollow hole 4
An annular recess 40g communicating with the opening 0e is formed. The buffer 42 on one side of the swivel tube 41 is held via a slip ring 44, and the buffer 43 on the other side is held via a slip ring 45. Slip ring 44
Is supported by a circlip 47 engaged with the fixing groove 40h of the adapter shaft portion 40, and the slip ring 45 is supported in contact with the step of the mounting portion 40b.

The swivel tube 41 has an adapter shaft 40
Hole 41 formed at a position facing the opening of the hollow hole 40e.
a into which a communication pipe 48 is press-fitted to form a communication hole 49;
The communication hole 49 communicates with the hollow hole 40e. The communication pipe 48 is inserted into a connection pipe 50 fixed to the swivel pipe 41, and the end of the auxiliary pipe 51 is connected to the connection pipe 50.

As described above, the swivel tube 41 is provided on the adapter shaft portion 40, and the auxiliary tube 51 is connected to the swivel tube 41.
0e. In addition, the swivel tube 41 has
An annular recess 41b is formed facing the annular recess 40g of the adapter shaft portion 40, and the annular recess 40g and the annular recess 41b are formed.
Thus, the passage 60 is formed. The communication hole 49 and the hollow hole 40e communicate with each other through the passage 60, and even when the swivel pipe 41 rotates and circumferentially shifts, air or water can be supplied from the swivel pipe 41 to the hollow hole 40e from the communication hole 49. it can.

At both sides of the opening of the hollow hole 40e, seal members 52 and 53 for sealing between the adapter shaft portion 40 and the swivel tube 41 are provided. Seal member 5
For the members 2 and 53, for example, an O-ring or packing is used.
The seal members 52 and 53 prevent air or water from leaking from the space between the adapter shaft portion 40 and the swivel tube 41 to the outside, so that a sufficient amount of air or water can be sent to the bit at the tip of the hole.

The drilling device 1 drills a hole 6 to a predetermined depth in the ground 5 by rotating and hitting the self-drilling lock bolt 1 by the operation of the drilling machine 2, and after the drilling is completed, the self-drilling lock bolt 1 Remove 4.

Then, the drilling machine 2 and the adapters 3 and 4 are removed from the self-drilling lock bolt 5, and a grout injection pipe (not shown) is connected to the self-drilled lock bolt 5, and the grout material is inserted through the hollow hole 5 c of the self-drilled lock bolt 5. Is injected from the mouth of the hollow hole 5c until it returns, and the grout material is hardened to fill and bury the self-drilling lock bolt 5.

In operation, the adapter 3 is attached to the drilling machine 2, the adapter 4 is further attached to the adapter 3, the base 5a of the self-drilling lock bolt 5 is removably inserted, and a hose such as air from the compresor is connected. Auxiliary pipe 5
1 and is connected to a swivel tube 41.

Air or water is sent from the hollow holes 40e and 5c of the adapter 4 and the self-drilling lock bolt 5, and the holes are cut using the self-drilled lock bolt 5. The hollow hole 5e is formed in the adapter shaft 40 of the adapter 4. Is formed, and a swivel pipe 41 is provided on the adapter shaft section 40. By connecting the auxiliary pipe 51 to the swivel pipe 41, air or water is sent from the auxiliary pipe 51 to the hollow hole 40e from outside with a simple structure. be able to.

[0045] Therefore, as a result of a shortage of air and water required for drilling the soft ground, drilling is difficult to be performed. Since the hole 40e is opened in the mounting hole 40c and communicated with the hollow hole 5c of the self-drilling lock bolt 5, the drilling machine 2 is enlarged by sending air or water from the outside of the adapter 4 without sending air or water from the drilling machine side. As a result, a sufficient feed amount can be obtained without any decrease in the drilling speed even when drilling on soft ground, etc., and the discharge of cutting powder when drilling using the self-drilling lock bolt 5 is improved, and workability is improved. Can be improved.

Further, since the annular recess 40g communicating with the opening of the hollow hole 40e is formed on the outer periphery of the adapter shaft portion 40, even if the swivel tube 41 is displaced in the circumferential direction, the air or the like is removed from the swivel tube 41. Water can be supplied from the communication hole 49 to the auxiliary hole 40f.

When the self-drilling lock bolt 1 is rotated and hit by the operation of the drilling machine 2 to drill a hole 6 to the ground 5 to a predetermined depth, the adapter 4 vibrates, but both sides of the swivel pipe 41 are It is attached to the adapter shaft part 40 through the shock absorbers 42 and 43, and the vibration is absorbed, and the adapter 4 gives a blow and a rotation for drilling, but the rotation from the adapter 4 is not transmitted to the swivel pipe 41. It has a structure.

As described above, since the transmission of vibration to the swivel tube 41 is reduced, the durability of the reswivel tube 41 is improved by the shock absorbers 42 and 43.

The shock absorbers 42 and 43 have a simple ring shape, and the material is hard and soft to exhibit shock absorbing performance.
7 can be formed as shown in FIG. The buffers 80 and 81 are formed by a shape other than the material of the material.
This is an example in which a buffer effect is provided. In the embodiment of FIG. 6, two annular grooves 80a are formed from the outer wall of the annular buffer body 80, and one annular groove 80b is formed from the inner wall, and several annular grooves 80a are formed in a direction perpendicular to the central axis. By providing the groove, a spring effect is generated, and higher buffer performance is exhibited. In the embodiment of FIG. 7, holes 81a in the axial direction are formed at equal intervals in the annular buffer 81, holes 81b are formed radially between the holes 81a, and are perpendicular to the direction of the center axis of the circle. Several openings are provided in the direction to obtain a predetermined buffering effect.

FIG. 8 is a sectional view showing another embodiment of the drilling device. In this embodiment, the mounting holes 4
The convex portion 4k is provided at a portion where the construction load is applied in contact with the base portion 5a of the self-drilling lock bolt 5 of c. Since the adapter 4 and the self-drilling lock bolt 5 come into contact at the convex portion 4k of the mounting hole 4c of the adapter 4 at the convex portion,
The deformation of the self-drilling lock bolt 5 due to the construction load at the time of drilling does not occur at the part of the self-drilling lock bolt but at the outside of the part due to the oblique tip, and the adapter 4 and the self-drilling lock do not lock. Since the deformation does not occur until the bolt 5 bites, the self-drilling lock bolt 5 can be easily removed. Also, the protrusion 4 is provided in the mounting hole 4c of the adapter 4.
It is only necessary to provide k, and it is not necessary to cut the conventional and complicated self-drilling lock bolts, so that the processing cost of the self-drilling lock bolts can be reduced. Also, a mounting hole 4c,
At least one of the base portions 5a of the self-drilling lock bolt 5 may be provided with the convex portion 4k at a portion where a contact load is applied. In addition, the convex portion 4k is formed in a single annular shape, but may be provided in a double annular shape.
Less deformation and easier to remove. The shape of the projection 4k is not limited to an annular shape, and may be an arcuate rib or a circular protrusion, and is not particularly limited. Further, it is preferable that the cross-sectional shape of the convex portion 4k is a substantially circular arc shape that draws a smooth curve.

Next, another embodiment of the drilling apparatus will be described with reference to FIGS. FIG. 9 is a half sectional view of a drilling device,
10 is a half sectional view of the adapter, FIG. 11 is a view showing a swivel tube, FIG. 12 is a view showing a washer, FIG. 13 is a view showing a buffer, FIG. 14 is a view showing a nipple, and FIG. 15 is a seal member FIG.

In the drilling apparatus 1 of this embodiment, a swivel pipe 100 is attached to the adapter shaft 40 of the adapter 4, and a washer 10 is provided on both sides of the swivel pipe 100.
Buffers 102, 102 are attached via 1, 101, respectively. Swivel tube 100 with washers 10 on each side
By arranging the shock absorbers 102 and 102 through the first and 101 and attaching the shock absorbers to the adapter shaft 40, even if the adapter 4 is vibrated by the drilling machine, the vibrations are absorbed by the shock absorbers 102 and 102 and the endurance of the swivel tube 100 And the cushioning bodies 102, 102 are provided via the washers 101, 101.
The durability of the shock absorber itself is also improved because of the arrangement.

A hollow hole 40e is formed in the adapter shaft portion 40, and annular recesses 100a, 100a formed in the swivel tube 100 are provided on both sides of the outer opening of the hollow hole 40e.
100a are provided with seal members 103,103. The seal members 103 seal the space between the adapter shaft 40 and the swivel tube 100.

The swivel tube 100 has an adapter shaft 4
A hole 100b is formed at a position facing the opening of the hollow hole 40e, and a nipple 111 fixed to the connection pipe 110 is provided in the hole 100b. In the connection pipe 110,
The end of the auxiliary pipe 112 is connected.

In the inner periphery of the swivel tube 100, a hollow hole 40e is provided.
An annular concave portion 100c communicating with the outer opening of the swivel tube 100 is formed so that air and water can be removed from the swivel tube 100 without affecting the strength of the adapter shaft portion 40 even if the swivel tube 100 is displaced in the circumferential direction. Can be reliably supplied.

In the present invention, the adapter 3 is attached to the drilling machine 2 and applied to another adapter 4 attached to the adapter 3, but the drilling machine 2 is hollowed into the adapter 3 without using this other adapter 4. In the case where the base 5a of the screw-type self-drilling lock bolt 5 is directly removably inserted, the present invention can be similarly applied to the adapter 3.

The present invention can be applied to a large-diameter self-drilling pile used for a long-ahead receiving method for a tunnel auxiliary method, in addition to the self-drilling rock bolt method described above.

[0058]

As described above, according to the first aspect of the present invention, the required amount of air and water for drilling soft ground or the like is insufficient, so that drilling is difficult. Since the hollow hole passing through the shaft center from the outside of the adapter shaft part was opened in the mounting hole and connected to the hollow hole of the self-drilling lock bolt, it was sent from the outside of the adapter without sending air or water from the drilling machine side As a result, the feed rate is sufficient without increasing the size of the drilling machine.As a result, the drilling speed does not decrease even when drilling on soft ground. The workability can be improved.

According to the second aspect of the present invention, a swivel pipe is provided on the adapter shaft, and an auxiliary pipe is connected to the swivel pipe, so that air and water can be supplied to the hollow hole from the outside with a simple structure.

According to the third aspect of the present invention, since the outer periphery of the adapter shaft portion has the annular concave portion communicating with the outer opening of the hollow hole, even if the swivel tube is displaced in the circumferential direction, air or water is removed from the swivel tube. Can be reliably supplied to the hollow hole.

According to the fourth aspect of the present invention, since the swivel tube has an annular recess in the inner periphery communicating with the outer opening of the hollow hole, the swivel tube can rotate in the circumferential direction without affecting the strength of the adapter shaft. Air or water can be reliably supplied to the hollow hole from the swivel tube even when the air hole is misaligned.

According to the fifth aspect of the present invention, since the seal member for sealing between the adapter shaft portion and the swivel tube is provided, air and water do not leak to the outside, and a sufficient amount of the bit up to the bit at the tip of the hole is formed. Can supply air and water.

According to the sixth aspect of the present invention, even if the adapter is vibrated by the drilling machine, the durability of the swivel tube is improved by the buffer.

According to the seventh aspect of the present invention, even if the adapter is vibrated by the drilling machine, the vibration is absorbed by the shock absorber, the durability of the swivel tube is improved, and the shock absorber is disposed via the washer. The durability of itself is also improved.

In the invention according to claim 8, the adapter and the self-drilling lock bolt are formed by the convex portion of the mounting hole of the adapter.
Due to the contact at the protruding part, the deformation of the self-drilling lock bolt due to the construction load at the time of drilling does not occur at any part or at the oblique tip, but between the hole of the self-drilling lock bolt and the outer shape The adapter does not deform until the adapter and the self-drilling lock bolt bite, so the self-drilling lock bolt can be easily removed. In addition, it is only necessary to provide a convex portion in the mounting hole of the adapter, and it is not necessary to cut the conventional and cumbersome self-piercing lock bolt, so that the processing cost of the self-piercing lock bolt can be reduced.

According to the ninth aspect of the present invention, by sending air or water from the outside of the adapter without sending air or water from the drilling machine side,
The ability to send air from a compressor or the like without increasing the size of the drilling machine, or the ability to send water from a pump, etc., can be increased so that the necessary amount of air and water can be sent for drilling soft ground. No reduction in drilling speed is observed even when drilling in the ground or the like, and the discharge of cuttings when drilling using self-drilling lock bolts is improved, and workability can be improved.

According to the tenth aspect of the present invention, the ability to send air from a compressor or the like without increasing the size of the drilling machine by sending the air from the outside of the adapter directly attached to the drilling machine without sending air or water from the side of the drilling machine. Or, by increasing the water supply capacity from pumps, etc., it is possible to send the necessary amount of air and water for drilling soft ground, etc. In addition, it is possible to improve the discharge of the cutting powder when drilling holes using the self-drilling lock bolts, and to improve the workability.

According to the eleventh aspect of the present invention, since the adapter and the self-drilling lock bolt come into contact at the protruding portion, deformation of the self-drilled lock bolt due to a load applied during drilling can cause deformation of any part or obliquely. The self-drilling lock bolt can be easily removed because it does not occur at the tip, but between the hole of the self-drilling lock bolt and the outside, and does not lead to deformation until the adapter and the self-drilling lock bolt bite. .

[Brief description of the drawings]

FIG. 1 is a side view of a drilling device.

FIG. 2 is a sectional view of an adapter attached to a drilling machine, a self-drilling lock bolt, and an assembled state of an adapter for connecting these.

FIG. 3 is an exploded view in which an adapter to be attached to the drilling machine, a self-drilling lock bolt, and an adapter for connecting these are respectively disassembled and half in section.

FIG. 4 is a sectional view showing an assembled state of an adapter to be attached to a drilling machine and an adapter for connecting a self-piercing lock bolt.

FIG. 5 is an exploded view in which an adapter attached to a drilling machine and an adapter for connecting a self-drilling lock bolt are respectively disassembled and half sections are formed.

FIG. 6 is a view showing another embodiment of the buffer.

FIG. 7 is a view showing still another embodiment of the buffer.

FIG. 8 is a sectional view showing another embodiment of the drilling device.

FIG. 9 is a half sectional view of a drilling device.

FIG. 10 is a half sectional view of an adapter.

FIG. 11 shows a swivel tube.

FIG. 12 is a view showing a washer.

FIG. 13 is a view showing a buffer.

FIG. 14 is a diagram showing a nipple.

FIG. 15 is a view showing a seal member.

[Explanation of symbols]

 2 Drilling machine 3, 4 Adapter 5 Self-drilling lock bolt 5a Base 40 Adapter shaft 40c Mounting hole 40e Hollow hole

Claims (11)

[Claims] An adapter shaft having a mounting hole into which a base of a self-drilling lock bolt of a hollow screw type is detachably inserted;
An adapter for a drilling machine having a hollow hole that is opened from the outside of the adapter shaft portion through the shaft center to the mounting hole and that sends air or water from the outside to the self-drilling lock bolt. 2. The swivel tube according to claim 1, wherein the adapter shaft portion has a communication hole communicating with the hollow hole, and a swivel tube to which an auxiliary tube for sending air or water from outside is connected. Drill adapter. 3. The adapter of a drilling machine according to claim 1, wherein an annular concave portion communicating with an outer opening of the hollow hole is formed on an outer periphery of the adapter shaft portion. 4. The drilling machine according to claim 1, wherein an annular concave portion communicating with an outer opening of the hollow hole is formed on an inner periphery of the swivel tube. adapter. 5. A seal member for sealing between the adapter shaft portion and the swivel tube at positions on both sides of an outer opening of the hollow hole. An adapter for a drilling machine according to claim 1. 6. The adapter for a drilling machine according to claim 1, wherein said swivel tube is mounted on said adapter shaft with buffer members arranged on both sides thereof. . 7. The swivel tube according to claim 1, wherein a buffer is disposed on both sides of the swivel tube via a washer and attached to the adapter shaft. Drill adapter. 8. The projection according to claim 1, wherein a projection is provided at a portion of the mounting hole which is in contact with the base of the self-drilling lock bolt and is subjected to a working load. Core drill adapter. 9. A drilling device for detachably inserting a base of a hollow screw type self-drilling lock bolt into a drilling machine via an adapter, and sending air or water through the hollow hole of the self-drilled lock bolt to drill a hole. A drilling machine wherein a base of a hollow screw type self-drilling lock bolt is detachably inserted into an adapter of the drilling machine via the adapter according to any one of claims 1 to 7. apparatus. 10. A drilling device for detachably inserting a base of a hollow screw type self-drilling lock bolt into a drilling machine via an adapter, and sending air or water from the hollow hole of the self-drilling lock bolt to drill. The drilling device according to claim 1, wherein the adapter according to any one of claims 1 to 7 is used as an adapter directly attached to the adapter of the drilling machine. 11. A projecting portion is provided at a portion where at least one of the mounting hole into which the base of the self-drilling lock bolt of the adapter is detachably inserted and the base of the self-drilling lock bolt is applied and a working load is applied. 10. The device according to claim 9, wherein
Alternatively, the drilling device according to claim 10.