JP5229682B2 - Drilling tool - Google Patents

Description

  The present invention relates to a drilling tool that is driven by an electric motor, an engine, or the like and mainly drills a hole in a stone material such as concrete or brick, and more particularly relates to a drilling tool having a dust collecting device that collects dust generated during drilling. Is.

  Drilling tools are used to drill holes in stone such as concrete and brick. The drilling tool is used to open a drilling hole in a work material by driving a drill blade, and includes a general rotary drill, a hammer drill that rotates and strikes the drill blade, and a vibration drill. Since dust is generated when a drilling operation is performed using a drilling tool, an operator may wear a dust mask, protective glasses, or the like to perform the operation. In recent years, in order to remove dust generated during work, a device provided with a dust collecting device for sucking up dust has been widely used.

  Patent Document 1 discloses a rotary impact tool as an example, and details thereof will be described with reference to FIG. FIG. 12 is a partial cross-sectional view showing a rotary impact tool connected to an external dust collector. The tip tool 52 is attached to the rotary impact tool 51 by the tool holding unit 60. The dust cover 54 surrounding a part of the tip tool 52 has a suction port 56, and a dust channel 58 is connected to the dust cover 54. The dust cover 54 is provided with a plurality of seals 55, 55 ′, 55 ″. The dust cover 54 is attached to the rotary impact tool 51 via the dust channel 58 and is held so as to be movable in the axial direction of the tip tool 52. The dust passage 58 can be connected to an external dust collector (not shown) or a dust collector such as a dust fan (not shown) built in the rotary impact tool body. The seals 55, 55 ', 55 "are made of rubber or the like. In order to be able to cope with tip tools of various diameters, radially extending cuts are provided. With the above configuration, dust generated when drilling concrete or the like is collected in a dust collection container (not shown) through the dust cover 54 and the dust channel 58 by the suction force of a dust collector (not shown).

Japanese Utility Model Publication No. 6-32248

  Dust generated by the drilling operation is diffused radially in the outer peripheral direction of the tip tool by the rotation of the tip tool. However, in the above-described conventional drilling tool, the suction port 56 is a single place, so In some cases, dust that has diffused to the far side cannot be completely sucked. Therefore, in order to perform good suction, it is necessary to increase the suction output of the dust collector.

  The objective of this invention is providing the drilling tool which has a dust collector which can attract | suck the generated dust efficiently.

  Another object of the present invention is to provide a drilling tool having a dust collecting device which is compact and has an improved dust absorption effect.

  Of the inventions disclosed in the present application, typical features will be described as follows.

According to one feature of the present invention, a drive source such as an electric motor, a transmission drive unit which transmits the rotation force of the driving source for driving the tool bit, Jill generated from the workpiece to be drilled by the tool bit In a drilling tool having a dust collecting device for sucking dust, the dust collecting device has a penetrating portion for penetrating the tip tool, a suction port for sucking generated dust and surrounding air, and a flow path connected to the suction port. It is characterized by providing a dust collecting adapter having two or more suction ports in the penetrating portion. This dust collecting adapter has a front wall and a rear wall in which a through hole is formed, an inner peripheral wall that connects the front wall and the rear wall, and is substantially parallel to the rotation axis of the tip tool, and an outer peripheral wall. The suction port is a plurality of holes or slits formed in the inner peripheral wall. The plurality of holes or slits are formed, for example, so as to be evenly arranged on the circumference of the cylindrical inner peripheral wall. Moreover, the size of the plurality of holes or slits formed in the inner peripheral wall can be arbitrarily set according to the sizes in the axial direction and the circumferential direction of the drilling tool.

According to another feature of the present invention, the inner peripheral wall is formed on the ring-shaped member that having a through hole capable dust collection adapter or al detachable. Ring-shaped member is detachable from or we drill body dust collecting adapter, the through hole, providing a seal member made of an elastic material for closing the gap between the tip tool. Further, the ring-shaped member, the dust collection adapter or al drilling tool body is also possible to detachably on the opposite side.

  According to still another feature of the present invention, the dust collecting adapter has a blowout port for blowing air to the vicinity of the penetrated tip tool, and a blowout flow path for sending clean air to the blowout port. It is efficient if the air for blowing out is sucked from the suction port by a fan provided on the rotating shaft of the electric motor, and the air for delivery to the blowout port is supplied.

According to still another aspect of the present invention, a driving source, a transmission driving unit that transmits the rotational force of the driving source to drive the tip tool, and a collection that sucks dust generated from the work material drilled by the tip tool. In a drilling tool having a dust device, the dust collector is provided with a dust collection adapter having a through-portion through which the tip tool penetrates and a flow path for sucking generated dust and surrounding air, and the outer periphery of the dust collection adapter wall is provided defining a through portion between the wall and the tip tool, the walls are formed on a removable annular member on for the dust collecting adapter. This wall suction port for sucking the ambient air and dust is formed.

  According to the drilling tool of claim 1, since the dust collecting adapter has two or more suction ports in the penetrating portion, the dust moving so as to diffuse from the tip tool can be sucked by the two or more suction ports. Therefore, it is possible to suck efficiently.

The dust collecting adapter has a front wall and a rear wall in which a through hole is formed, and an inner peripheral wall and an outer peripheral wall that are connected to the front wall and substantially parallel to the rotation axis of the tip tool. Since the suction port is a plurality of holes or slits formed on the inner peripheral wall, the generated dust passes through the space surrounded by the inner peripheral wall, outer peripheral wall, rear wall, and front wall from the plurality of suction ports. Thus, it is possible to suck into the flow path portion for collecting dust, and it is possible to prevent the dust from leaking from the enclosed space.

Furthermore the inner peripheral wall is to be formed on the ring-shaped member that have a possibility through holes detachable from the dust collecting adapter body portion, not only the assembling is improved, one lifting the inner walls of different suction port ring-shaped member Can be easily exchanged. In particular, by attaching an inner wall with a different inner diameter according to the diameter of the tip tool, the suction port can be brought closer to the tip tool, and dust generated before the dust diffuses can be sucked. Can be collected more efficiently.

According to drilling tool according to claim 2, wherein the ring-shaped member is detachable from or we drill body dust collecting adapter, the through hole, formed of an elastic material for closing the gap between the tip tool Since the seal member is provided, it is possible to prevent dust from leaking from the through hole.

According to the drilling tool of claim 3, wherein the ring-shaped member, to the dust collection adapter or al drilling tool body is detachably attached to the opposite side, in a state of attaching the tool bit drilling tool body , in order to be able to attach the ring-shaped member may be detachable ring-shaped member to provide easy dust collecting adapter.

According to the drilling tool of the fourth aspect , the dust collecting adapter has the air outlet for blowing air to the vicinity of the penetrating tip tool and the air outlet passage for sending clean air to the air outlet. After dust remaining inside the dust adapter or inside the perforation hole is blown out, dust can be collected by the outlet of the dust collection adapter, so that dust can be prevented from remaining inside the dust collection adapter or inside the perforation hole. In addition, it is possible to improve the performance of removing dust remaining in the dust collecting adapter and in the hole.

According to the drilling tool of the fifth aspect , the fan is provided on the rotating shaft of the electric motor, and the suction force from the suction port and the supply of the air for delivery to the blowout port are performed by the rotational force of the fan. Since a single motor provides power for suction and delivery, two motors are not required, and a compact and efficient drilling tool can be realized.

According to the drilling tool of claim 6, since the plurality of holes or slits formed in the inner peripheral wall are formed so as to be evenly arranged on the circumference of the cylindrical inner peripheral wall, Since suction is evenly performed by a plurality of holes or slits, a difference in suction status within the dust collection adapter hardly occurs, and efficient suction can be performed.

According to the drilling tool of claim 7, since the wall located between the outer peripheral wall of the dust collecting adapter and the tip tool is provided inside the dust collecting adapter, the wall occupies the area inside the dust collecting adapter. The flow velocity for sucking dust and surrounding air inside the dust collecting adapter can be increased, and more dust and surrounding air can be sucked into the flow path for dust collection.

According to the drilling tool of claim 8 , since the suction port is formed by the wall in the dust collecting adapter, the flow velocity can be increased, and more dust can be supplied to the flow path portion for collecting dust. The surrounding air can be sucked.

  A first embodiment of a drilling tool according to the present invention will be described with reference to FIGS. FIG. 1 is a view showing an entire drilling tool according to an embodiment of the present invention, and shows a cross-sectional view partially broken. 2 is a partial cross-sectional view of the AA portion of the rotary impact tool 101 of FIG. FIG. 3 is a perspective view showing an assembly structure of the dust collecting adapter 20.

A rotary impact tool 101, which is an example of a drilling tool, has four modes of operation modes: a rotation / striking mode, a rotation mode, a striking mode, and a neutral mode. The housing 2 has a motor as a drive source. 7 and a striking mechanism portion, a rotation transmission mechanism portion, and an operation mode switching mechanism portion (not shown). A handle 3 is provided at the rear end of the housing 2 of the main body (the direction shown in FIG. 1 will be described as front and rear and up and down. The same applies hereinafter). The handle 3 is provided with a switch 4 and is used for power supply. A power cord 5 is connected. A tool holding portion 10 is provided at the tip portion (front end portion) of the rotary impact tool 101, whereby a tip tool 11 such as a drill blade can be mounted. The rotational force of the motor 7 is transmitted to the tip tool 11 as a rotational force and / or striking force via a rotation transmission mechanism and a striking mechanism (not shown), and the tip tool 11 performs a required work on the work material 29. I do.

  In the drilling work on the work material 29, the operator holds the handle 3 of the rotary impact tool 101 and operates the switch 4 to drive the motor 7 and transmit the rotational force of the motor 7. The tip tool 11 attached to the tip of the rotary impact tool 101 rotates and strikes. The operator presses the rotary impact tool 101 in the direction of the work material 29, whereby the tip tool 11 crushes the work material 29 and creates a hole in the work material 29.

The tip tool 11 has a tip portion 11a that crushes the work material 29 and a spiral portion 11b that has a function of moving dust generated by crushing the work material 29 within the drill hole. As shown in FIG. 1, the vicinity of the tip portion of the tip tool 11 passes through the penetration portion 27 of the dust collecting adapter 20 and reaches the work material 29. The length of the penetrating portion 27 serving as the penetrating region is only a part of the entire length of the tip tool 11.

  When the tip tool 11 is driven, the motor 7 rotates and generates heat. Therefore, the rotating shaft 8 is provided with a cooling fan 9 that sucks air to cool the motor 7. Due to the suction force of the cooling fan 9, air flows from a cooling air intake port (not shown) provided in the tail cover 12 of the motor 7, cools the motor 7, reaches the cooling fan 9, and reaches the cooling fan 9 (not shown). It is discharged from the discharge port to the outside of the rotary impact tool 101.

  The dust collecting adapter 20 has a double structure in which a space between the rear wall 23 and the front wall 24 is surrounded by an outer peripheral wall 21 and an inner peripheral wall 22. The inner peripheral side of the inner peripheral wall 22 is a cavity, and this is a penetration portion 27 that is a region through which the tip tool 11 passes. The dust collection adapter 20 further includes a dust collection adapter flow path portion 25 connected to the outer peripheral wall 21, and is fixed to the slider portion 17 of the dust collection device attached to the tip tool 11. The slider portion 17 is attached to the housing 30 of the dust collector at the rear thereof. The dust collecting adapter 20, the slider portion 17 and the housing 30 constitute a dust collecting device, and the dust collecting device can be attached to and detached from the rotary impact tool 101.

  The inner peripheral wall 22 of the dust collecting adapter 20 has a substantially cylindrical shape that is substantially parallel or coaxial with the rotation axis of the tip tool, and a plurality of independent suction ports 26 are formed in the circumferential direction. The entrance of the through-hole 27 of the rear wall 23 is provided with a seal 28 formed of an elastic material such as rubber and having radially extending cuts so as to be compatible with tip tools of various diameters. The dust collection adapter 20 is held at the tip of the slider portion 17 of the dust collector attached to the rotary impact tool 101. The slider portion 17 is composed of two members, and contracts when one member enters another member against the biasing force of the spring 18. An expandable / contractable dust channel 19 is provided inside the slider portion 17, and the dust collection adapter 20 is urged toward the work material 29 (forward). The slider portion 17 can be expanded and contracted from the maximum extension position to the minimum contraction position, and the dust collection adapter 20 can be positioned from the front end to the vicinity of the rear end of the spiral portion 11b of the tip tool 11 by the extension and contraction.

  At the time of drilling the work material 29, the rotary impact tool 101 moves in the direction of the work material 29 as the drill hole becomes deeper. Along with this, the spring 18 is pressed and contracted, and the slider portion 17 contracts, so that the front wall 24 of the dust collection adapter 20 always maintains a contact relationship with the work material 29.

  Next, in the rotary impact tool 101 to which the present invention is applied, a process of collecting dust generated during work will be described. In the drilling work on the work material 29, the operator holds the handle 3 of the rotary impact tool 101 and operates the power switch 4 to drive the motor 7, and the tool holding unit 10 is driven by the driving force of the motor 7. The tip tool 11 mounted on is rotated and hit, and the rotary hitting tool 101 is urged in the direction of the work material 29, whereby the tip tool 11 crushes the work material 29 and creates a hole. The dust generated from the tip portion 11a of the tip tool 11 moves into the dust collecting adapter 20 together with the rotation of the tip tool 11 and the shape of the spiral portion 11b.

  In the dust collection adapter 20, the dust diffuses radially toward the outer peripheral direction of the tip tool 11 by the rotation of the tip tool 11. In the dust collection adapter 20 according to the present embodiment, as shown in FIG. 2, a plurality of suction ports 26 are provided on the inner peripheral wall 22 of the dust collection adapter 20 so as to coincide with the dust diffusion direction. The shape of the suction port 26 can be any shape such as a round hole, an elliptical hole, or a square hole. Further, not a hole but a slit extending in the axial direction (the front-rear direction in FIG. 1) may be used. The number and position of the suction ports can be arbitrarily selected so as to match the tip tool 11 used for drilling. By providing a plurality of the suction ports 26, it is possible to efficiently suck the dust diffused inside the dust collection adapter 20.

As shown in FIG. 3, the dust collection adapter rear portion 20 a is formed with a seal 28 through which the tip tool 11 passes, and includes an outer peripheral wall 21, a rear wall 23, and a dust collection adapter flow path portion 25. These structures are the main body portion of the dust collection adapter, and a plurality of grooves 21 a and recesses 21 b for holding the dust collection adapter front portion 20 b are provided in a part of the outer peripheral side of the outer peripheral wall 21. The dust collection adapter front side portion 20 b is a member that is attached to and detached from the main body of the dust collection adapter, and is attached to the side that contacts the work material 29. The member includes an annular front wall 24 having a through-hole and a substantially cylindrical inner peripheral wall 22 extending vertically from the air to the front surface, and a plurality of suction ports 26 are formed in the inner peripheral wall 22. . These are integrally formed of plastic, for example. In the present embodiment, the suction port 26 has a slit shape extending in the axial direction of the tip tool 11. The diameter of the substantially cylindrical inner peripheral wall 22 and the size of the slit may be appropriately set in accordance with the diameter of the tip tool 11 used and the size of chips and dust generated from the work material 29. Attachment portions 24a are provided at a plurality of, for example, two locations on the circumferential portion of the front wall 24, and the attachment portions 24a are provided with convex portions 24b that fit into the concave portions 21b of the dust collection adapter rear portion 20a. An elastic material such as rubber or sponge is preferably disposed at the joint between the dust collection adapter front side portion 20b and the dust collection adapter rear side portion 20a to enhance the adhesion.

  As described above, the dust collection adapter front portion 20b can be attached and detached, so that the diameter of the inner peripheral wall 22 and the number, size, and arrangement of the suction ports 26 are different so as to match the diameter of the tip tool 11. It can be changed to the front side portion 20b, and even when the diameter of the tip tool 11 is changed, dust can be efficiently sucked. In this embodiment, the fitting of the concavo-convex part is used for attaching the dust collecting adapter main body (rear part) and the detachable member (rear part), but other means such as screwing and other fittings are used. May be used.

  The dust that has moved into the dust collection adapter 20 is sucked from the suction port 26 by the suction force of the dust collection fan 15 provided on the rotating shaft 8 of the motor 7, and the arrow shown in FIG. Are guided to the dust flow path 19 and separated into air and dust by the filter 14 in the dust collection case 13, and the dust is stored in the dust collection case 13. On the other hand, only the air filtered by the filter 14 passes through the air passage 16, reaches the dust collecting fan 15, and is discharged out of the rotary impact tool 101 through a discharge port (not shown).

  The filter 14 is preferably removable from the dust collection case 13. Therefore, the lower part or the side part of the housing 30 of the dust collector may be configured in an open state or configured to be openable and closable. If the dust collection case 13 is configured to be detachable from the dust collector, the dust stored in the dust collection case 13 can be easily discarded. Further, the filter 14 can be easily replaced when the filter 14 is clogged.

  As described above, according to the present embodiment, it is possible to realize a dust collector that can suck generated dust without leakage from the suction port.

  Next, one modification of the first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a perspective view showing another assembly structure of the dust collection adapter 20.

  In FIG. 4, a member that is detachable compared to the structure shown in FIG. 3 is not the front side (work material 29 side) but the rear side (rotary impact tool 101 side). A seal (not shown) through which the tip tool 11 passes is formed in the dust collection adapter rear portion 20c, which is the dust collection adapter main body, and the outer peripheral wall 21 ′, the front wall 24 ′, and the dust collection adapter flow path portion 25 are It is formed on the dust collection adapter front side portion 20d side. A groove 21a and a recess 21b for holding the dust collecting adapter rear portion 20c are provided on the outer peripheral portion of the outer peripheral wall 21 '. The front part 20d of the dust collection adapter is the side in contact with the work material 29, and a substantially circular through hole 27a is formed in the front wall 24 '.

  A plurality of suction ports 26 are formed in the inner peripheral wall 22. The shape of the suction port 26 is a slit shape extending in the axial direction of the tip tool 11. Mounting portions 23a are provided at a plurality of, for example, two locations on the circumferential portion of the rear wall 23 '. The mounting portions 23a are provided with convex portions 23b that fit into the concave portions 21b of the dust collection adapter front portion 20d. The end of the mounting portion 23a opposite to the convex portion 23b is formed with a knob portion 23c protruding so as to facilitate attachment / detachment of the dust collection adapter rear portion 20c. It is preferable to arrange an elastic material such as rubber or sponge at the joint between the dust collection adapter rear side portion 20c and the dust collection adapter front side portion 20d to enhance the adhesion.

  In FIG. 4, since the member on the side having the seal through which the tip tool 11 penetrates, that is, the dust collecting adapter rear portion 20c is configured to be detachable, the seal can be easily exchanged according to the tip tool 11 used by the operator. can do. Further, even when the seal is worn, only the removable member needs to be replaced, so that the cost of replacement parts can be reduced and the replacement of the seal is facilitated.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, description is abbreviate | omitted about the member similar to 1st embodiment, and only a different part is demonstrated.

  In FIG. 5, the configuration of the rotary impact tool 101 is almost the same as the configuration described in FIG. 1, and the difference is that the flow of air discharged from the dust collecting fan 15 a provided on the rotary shaft 8 of the motor 7. It is. In addition, the dust collector having the housing 30, the slider portion 17, and the dust collection adapter 20 is provided with not only a dust flow path 19 for collecting dust but also a blowout flow path 32 and a blowout outlet 36 for blowing out air. It is done.

Dust generated during the drilling operation moves into the dust collection adapter 20e, and dust and air move from the dust collection adapter 20e to the dust channel 19 by the action of the dust collection fan 15a. Thereafter, dust is stored inside the dust collection case 13 by the filter 14 provided in the dust collection case 13, and only the air filtered by the filter 14 moves to the air passage 16. Part of the air that has moved to the air passage 16 is returned to the dust collecting adapter 20e by the dust collecting fan 15a, and the remaining air is discharged to the outside of the main body through a discharge port (not shown). The recirculated air moves to the blowing channel 32. The blowout flow path 32 is provided inside the slider portion 17 and above the dust flow path 19. The arrangement of the blowout flow path 32 and the dust flow path 19 may be up and down, left and right, or may be coaxial and may be the dust flow path 19 on the inside and the blow flow path 32 on the outside.

The air that has passed through the blowout flow path 32 passes through the rear end side of the dust collection adapter 20e and is guided to the air outlet 36 at the top of the dust collection adapter 20e. The blower outlet 36 is formed in the dust collection adapter 20e. The clean air filtered by the filter 14 by the blower outlet 36 is blown to the tip of the tip tool 11 and / or the vicinity of the work material 29. Since wind can be blown in the vicinity of the tip of the tip tool 11 in this way, the staying dust can be effectively wound up and collected with a relatively small suction force, and the dust collection adapter 20e. It is also possible to suppress the leakage of dust to the outside.

  The shape and installation position of the air outlet 36 will be further described. FIG. 6 is an enlarged cross-sectional view showing details of the dust collection adapter 20e of FIG. The flow path inside the dust collection adapter 20e is divided into two in the front-rear direction, and the dust collection adapter flow path portion 25a is formed on the front side, and the discharge flow paths 35a and 35b are formed on the rear side. The blowout flow path 35 a is connected to the blowout flow path 35 b and is connected to a blowout port 36 provided on the inner peripheral side of the inner peripheral wall 22. The position where the air outlet 36 is provided is arbitrary, but as shown in FIG. 7, the air outlet 36 may be provided inside the inner peripheral wall 22 and at an upper position, preferably at the uppermost position. In this way, the air outlet 36 is not located at the suction port 26 but at a position shifted from the suction port 26 and is provided on the inner peripheral wall 22 on the side away from the dust collecting adapter channel portion 25a. Can be prevented from being immediately sucked from the suction port 26, so that air can be efficiently blown.

  FIG. 8 is a diagram illustrating a state where the tip tool 11 has penetrated the seal 28 in FIG. 7. By comparing FIG. 7 and FIG. 8, it will be understood that the diameter of the hole formed in the seal 28 is smaller than the diameter of the tip tool 11.

  FIG. 9 is a diagram showing a state when a drilling operation is performed with a tip tool. At the time of drilling work, the tip of the air outlet 36 is blocked, so that the air blown toward the tip tool 11 side, that is, toward the center of the through hole flows by the notch formed at the tip of the air outlet 36, and then the surrounding suction port together with dust 26 is aspirated. At the end of the drilling operation, the rotary impact tool 101 is shifted so that the position of the air outlet 36 of the dust collecting adapter 20e matches the drilled hole. The dust can be efficiently discharged from the air, and the discharged dust is efficiently sucked by the surrounding suction port 26.

According to the second embodiment of the present invention, since the air outlet 36 is formed in the dust collecting adapter 20e, it is not necessary to add another member to the dust collecting adapter as the blowing means. Further, since the wind used for blowing is generated by the dust collecting fan 15 used for collecting dust, it is not necessary to newly add a blower such as a blower fan.

Furthermore, since the air used for spraying the interior of the blowout passage 32 which is provided inside the slider portion 17 passes, in order to move the wind of the air used for spraying, provide a new member other than the slider portion 17 There is an effect that it is not necessary.

  Next, a third embodiment of the present invention will be described with reference to FIG. In the dust collection adapter 20, the dust diffuses radially toward the outer peripheral direction of the tip tool 11 by the rotation of the tip tool 11. In the dust collecting adapter 20c according to the third embodiment, a wall 22c is provided in a part between the outer peripheral wall 21c and the tip tool 11, as shown in FIG. The wall 22c forms two suction ports 26c for sucking dust and surrounding air. In the present embodiment, the two suction ports 26c are formed by the wall 22c, but the number is not limited to two, and three or more may be formed.

  As described above, as described based on the embodiment showing the present invention, according to the present invention, it is possible to efficiently collect dust generated during drilling work, and it is possible to improve the work site and the environment of the worker. It becomes. In addition, this invention is not limited to the above-mentioned form, A various change is possible within the range which does not deviate from the meaning.

  For example, each dimension and shape of the dust collection adapters 20 and 20a may be set arbitrarily. Further, instead of the seal 28 provided on the rear wall 23, a radially extending brush may be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view (a part of a cross section is shown) illustrating a drilling tool according to an embodiment of the present invention. It is a figure which shows the partial cross section of the AA part of the dust collecting adapter 20 of FIG. It is a perspective view which shows the assembly structure of the dust collecting adapter 20 of FIG. It is a perspective view which shows the assembly structure of the dust collection adapter 20 which shows the modification of 1st Embodiment. It is a general view (a section is shown in part) showing a drilling tool concerning a 2nd embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view showing details of the dust collection adapter 20e of FIG. It is sectional drawing which shows the cross section of the BB part of the dust collection adapter 20e of FIG. In FIG. 7, it is sectional drawing which shows a state when the front-end tool 11 is inserted. It is a figure which shows a state when performing the drilling | boring operation | work using the dust collection adapter 20e of FIG. It is a figure which shows the dust collection state after a drilling operation | work using the dust collection adapter 20e of FIG. It is a figure which shows the partial cross section of the dust collecting adapter 20 which concerns on the 3rd Embodiment of this invention. It is a general view which shows the conventional drilling tool.

DESCRIPTION OF SYMBOLS 1,101 Rotary impact tool 2 Housing 3 Handle 4 Switch 5 Power cord 6 Mode change switch 7 Motor 8 Rotating shaft 9 Cooling fan 10 Tool holding part 11 Tip tool 11a Tip part 11b Spiral part 12 Tail cover 13 Dust collection case 14 Filter 15 Dust collection fan 16 Air passage 17 Slider part 18 Spring 19 Dust channel 20 Dust collection adapter 20a Dust collection adapter rear part 20b Dust collection adapter front part 21, 21 ', 21c Outer peripheral wall 21a Groove 21b Recessed part 22, 22c Inner peripheral wall 23 Rear wall 24, 24 'Front wall 24a Mounting portion 24b Protruding portion 25 Dust collecting adapter flow path portion 26, 26c Suction port 27, 27c Through portion 27a Through hole 28 Seal 29 Work material
30 (Dust collector) housing 31a Fixed pipe 31b Slider pipe 32 Blowout flow path 36 Blowout opening

Claims (8)

In a drilling tool having a drive source, a transmission drive unit that transmits the rotational force of the drive source to drive the tip tool, and a dust collector that sucks dust generated from the work material drilled by the tip tool,
It said dust collector is provided a through portion through which the said tool bit, the dust generated and the suction port for sucking the ambient air, the dust collecting adapter having channels leading to said suction port,
Two or more suction ports are provided in the penetrating part,
The dust collecting adapter has a front wall and a rear wall in which a through hole is formed, an inner peripheral wall that connects them and is substantially parallel to the rotation axis of the tip tool, and an outer peripheral wall.
The penetrating portion is defined by the inner peripheral wall, wherein the suction port Ri plurality of holes or slits der formed in said peripheral wall,
The inner peripheral wall is formed on an annular member that is detachable from the dust collecting adapter and has a through hole . Before verge member is detachable from the dust collecting adapter or al the drilling tool body,
Drilling tool according to claim 1, wherein the through hole, they characterized in that a sealing member made of an elastic material for closing the gap between the tip tool. Before verge member is drilling tool according to claim 1, characterized in that the said dust collecting adapter or al the drilling tool body is detachably attached to the opposite side. The dust collecting adapter is provided with air outlet for blowing air in the vicinity penetrated tip tool, any of claims 1 to 3, characterized in that it has a blowout passage for delivering clean air to該吹outlet The drilling tool according to claim 1. The drive source is an electric motor, and a fan is provided on a rotating shaft of the electric motor, and suction from the suction port and supply of air for delivery to the air outlet are performed by the rotational force of the fan. The drilling tool according to claim 4 . A plurality of holes or slits formed in said peripheral wall, according to claims 1, characterized in that it is formed so as to uniformly arranged on the circumference of the inner peripheral wall of the cylindrical to any one of the 5 Drilling tools. In a drilling tool having a drive source, a transmission drive unit that transmits the rotational force of the drive source to drive the tip tool, and a dust collector that sucks dust generated from the work material drilled by the tip tool,
The dust collector is provided with a dust collection adapter having a through-portion for penetrating the tip tool, and a flow path for sucking the generated dust and surrounding air,
Walls defining the through portion between the tool bit and the outer peripheral wall of the dust collecting adapter is provided,
Drilling the wall, characterized in Rukoto formed on removable annular member relative to the dust collecting adapter. The front Kikabe, drilling tool according to claim 7, characterized in that suction port for sucking the ambient air and dust is formed.

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