WO2010029687A1

WO2010029687A1 - Dust suction device for electric tool, and electric tool

Info

Publication number: WO2010029687A1
Application number: PCT/JP2009/003941
Authority: WO
Inventors: 小西拓郎
Original assignee: 株式会社マキタ
Priority date: 2008-09-11
Filing date: 2009-08-19
Publication date: 2010-03-18
Also published as: JP5015886B2; JP2010064199A

Abstract

A dust suction device for an electric tool, wherein the dust suction device can provide an existing electric tool with a dust suction function, has excellent versatility, and is configured such that the electric tool and the dust suction device can be reliably operated at the same time to improve convenience of use of the dust suction device. A dust suction device (1) for an electric tool is used by being mounted to the electric tool, such as a vibration drill (40), and is driven by commercial electric power, and a housing (2) of the dust suction device (1) is provided with an electric power supply socket (37) to which the commercial electric power is supplied and into which a plug (47) of the vibration drill (40) can be inserted.

Description

Dust absorbing device for electric tool and electric tool

The present invention relates to a dust collector for an electric tool that is used by being integrally attached to an electric tool such as a hammer drill, and an electric tool equipped with the dust absorber.

A dust suction device used for an electric tool includes a motor, a suction fan that rotates by driving the motor, and a filter that is positioned upstream of the suction fan in a housing. A hose member guided when the tip tool is connected. Therefore, when the suction fan rotates as the motor is driven, the outside air is sucked from the tip of the hose member, guided to the housing, passed through the filter, and discharged to the outside from the exhaust port provided in the housing. Thereby, the dust etc. which generate | occur | produced by the drilling operation | work etc. can be suck | inhaled with external air, and can be absorbed with a filter.
In such a dust suction device, an external power source such as a commercial power source or a battery is often used for driving the motor. For example, in Patent Document 1, a dust suction device is connected to a portable battery to obtain a power source. In particular, here, a contact pair is provided on the main body of the dust suction device, and the main body and the electric tool are connected via the contact pair. Are electrically connected, and the power of the electric tool is also obtained from the battery via the dust suction device.

JP 2002-307332 A

Thus, when the dust suction device is electrically connected to the power tool via the contact pair, it becomes a dedicated product that cannot be used without the other party, and the dust suction device cannot be used by being attached to an existing power tool. Therefore, it becomes necessary to prepare a dedicated electric tool, which increases the cost. Therefore, it is conceivable to eliminate the contact pair so that the power tool also obtains power from the commercial power supply. However, when the power tool and the dust suction device require two outlets, there is only one outlet at the site. Cannot handle.

Therefore, the present invention can easily provide a dust absorbing function to an existing electric tool, is excellent in versatility, and can be used at the same time with the electric tool and the dust absorbing device. And it aims at providing a power tool.

In order to achieve the above object, the invention described in claim 1 is a dust suction device for an electric tool,
A housing that can be mounted on the electric tool, a motor driven by a commercial power source, a suction fan that rotates by driving the motor, a filter located upstream of the suction fan, the commercial power source, and the electric power source A power supply socket into which a power plug of a tool can be inserted, and with the rotation of the suction fan, after sucking outside air from a hose member connected to the housing on the upstream side of the filter and passing through the filter The commercial power is supplied to the electric tool in which the power plug is inserted into the power supply socket while being discharged from an exhaust port provided in the housing.
In this case, in order to improve the usability, the motor is operated in conjunction with the supply of commercial power from the power supply socket, or in a convenient configuration by simultaneous use with the power tool. A mounting means to the electric tool can be provided.
In order to achieve the above object, the invention described in claim 11 is an electric tool, and is characterized in that the dust suction device for an electric tool according to claim 1 is mounted.

According to invention of

Claim

1 and 11, a dust absorption function can be easily provided also to the existing electric tool, and it is excellent in versatility. In addition, for example, even when there is only one outlet of a commercial power source at the site, the power tool and the power tool dust suction device can be reliably used at the same time, which improves usability.
In particular, if the motor is linked to the supply of commercial power, it is not necessary to turn on / off the dust collector for the power tool in accordance with the use of the power tool, making it easier to use and only when necessary. Since the dust suction device for electric tools operates, it leads to saving of electric energy. If the housing is provided with a mounting means, the mounting to the power tool can be easily performed, and the simultaneous use with the power tool becomes convenient.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an example of a dust collector for an electric tool (hereinafter simply referred to as “dust collector”), FIG. 2 is a plan view thereof, FIG. 3 is a front view and a rear view, and FIG. Yes.
The dust suction device 1 includes a drive unit 3 at the rear in the housing 2 whose side view is L-shaped and a dust collection unit 4 at the front. First, in the drive unit 3, a motor 5 with the output shaft 6 facing forward and a controller 7 are accommodated, and a suction fan 8 fixed to the output shaft 6 is accommodated in a housing chamber 9 that is defined at the front end of the drive unit 3. Is placed inside. Reference numeral 10 denotes a partition wall that partitions the drive unit 3 and the dust collecting unit 4. The partition wall 10 is provided with a communication hole 11 that opens toward the center of the suction fan 8. Are formed with a plurality of

exhaust ports

12, 12... Along the outer periphery of the suction fan 8.

Next, in the dust collection part 4, the dust box 13 is accommodated in the housing 2 so that it can be inserted into and removed from the lower side, and the filter 14 is accommodated in the dust box 13 so as to partition the dust collection part 4 forward and backward.
A suction port 15 is formed on the upper side surface of the dust collecting portion 4 in the housing 2 and an elbow 16 is fitted into the elbow 16. A cylindrical dust suction head 19 is connected to the elbow 16 via a flexible hose 17 and a straight hose 18. Is connected. The dust suction head 19 is provided with a ring 20 through which a bit attached to the front end of the electric power tool penetrates at the tip so that outside air can be sucked from the ring 20. The flexible hose 17, the straight hose 18, and the dust suction head 19 are the hose member of the present invention. Further, a mounting cylinder 21 is externally mounted on the rear end of the straight hose 18, and a connecting rod 22 that can be inserted into a stopper pole insertion portion provided on a side handle of the electric tool is held below the mounting cylinder 21. .

Reference numeral 23 denotes an adjuster as a mounting means provided at each of three positions, that is, the upper surface of the driving unit 3 and the front and rear surfaces of the dust collecting unit 4, and as shown in FIG. A pair of

belts

26 and 26 that can be coupled to each other at arbitrary positions are provided at both ends of the mount 25 so as to be rotatable. However, the mount 25 is configured to collect dust so that the V-shaped portion faces the rear in the adjuster 23 on the upper surface of the drive unit 3 and the V-shaped portion faces the upper side in the adjuster 23 on the front surface of the dust collecting unit 4. The adjusters 23 on the rear surface of the portion 4 are connected to the slide plates 24 so that the V-shaped portions face rearward.

The slide plate 24 is fitted with inverted L-

shaped rails

27, 27 provided at both left and right ends of each surface of the housing 2 by

fitting protrusions

28, 28 provided at the left and right ends of the slide plate 24, respectively. The drive unit 3 can slide back and forth, and the dust collection unit 4 can slide up and down. Inside the slide plate 24, as shown in FIG. 6, a pair of

claws

29, 29 whose outer ends are formed in a continuous mountain shape are slidable in the left-right direction and are provided between the

claws

29, 29. 30, the outer end is urged in a direction protruding from the slide plate 24. On the inner surface of each rail 27, continuous mountain-shaped locked

portions

31, 31 that are locked by protruding claws 29 are formed.

Reference numeral 32 denotes a window formed on the slide plate 24 to expose a rectangular operation portion 33 projecting from the upper surface of each nail 29. Each operation portion 33 has a recess 34 that facilitates sliding of the nail 29 with a finger. Is formed. Therefore, when the

claws

29 and 29 are slid so as to be close to each other against the bias of the

coil springs

30 and 30 using the

recesses

34 and 34, the

claws

29 and 29 are separated from the locked portion 31. The plate 24 can be slid to any position along the rail 27. When the finger is released from the

claws

29 and 29 at an arbitrary position, the

claws

29 and 29 slid outward by the bias of the

coil springs

30 and 30 are respectively locked to the locked portions 31, and the slide plate 24 is moved at the position. It will be fixed.

The drive unit 3 is provided with a power cord 35 that is electrically connected to a motor drive circuit in the controller 7, and is pulled out from the rear surface of the housing 2 and is also referred to as a power supply socket (hereinafter simply referred to as “socket”). ) 37 is provided. The socket 37 allows a power plug of the electric tool to be inserted from the back of the housing 2 and is connected in parallel to a motor drive circuit in the controller 7 so that commercial power obtained from the power cord 35 can be supplied. Yes.

Also, an interlocking switch 38 is provided adjacent to the socket 37 on the rear surface of the housing 2. The interlock switch 38 switches between the independent operation of the dust suction device 1 and the interlock operation of the electric tool. The motor drive circuit of the controller 7 is disclosed in Japanese Patent Application Laid-Open No. 2008-36723 according to the prior application of the present applicant. As in the disclosed structure, the current detection unit that detects whether or not the socket 37 is energized via a current transformer, and the changeover switch provided in the motor drive circuit based on the detection result of the current detection unit are turned on. And a control unit for performing an OFF operation.

That is, when the interlock switch 38 is turned on, the control unit turns off the changeover switch. When the electric tool connected to the socket 37 is used, the current detection unit detects the energization, and the control unit turns on the changeover switch. Then, the motor 5 is driven. When the interlock switch is turned off, the control unit turns on the changeover switch and drives only the motor 5 alone.
On the other hand, when the power tool is stopped, the current detection unit detects the power supply stop, but the control unit delays the changeover switch OFF for a predetermined time (several seconds) after the power supply stop. Even if the electric tool stops, the motor 5 does not stop immediately.

The dust suction device 1 configured as described above can be mounted on an existing electric tool driven by a commercial power source. FIGS. 7 to 9 show a state in which the dust suction device 1 is mounted on a vibration drill 40 which is an example of an electric tool. The vibration drill 40 has a housing 41 in which a motor and a rotation / vibration mechanism are installed. The chuck 42 is attached to the front end of the housing 41, and a power cord 44 is provided at the lower end of the handle 43 formed downward from the rear end of the housing 41. A side handle 45 is mounted sideways from the front end of the housing 41.

The vibration drill 40 is arranged so that the front end of the housing 41 is located above the dust collection unit 4 of the dust suction device 1 and the handle 43 is located behind the drive unit 3, and the mount 25 of the adjuster 23 on the front surface of the dust collection unit 4. On the other hand, the front end of the housing 41 is placed, while the front face of the handle 43 is placed on the mount 25 of the adjuster 23 of the drive unit 3, and the belt 26 is wound around and clamped. And the connecting rod 22 provided in the mounting cylinder 21 is inserted into the stopper pole insertion part 46 provided in the upper part of the side handle 45, and the mounting cylinder 21 is fixed. In this state, the straight hose 18 protrudes forward, the ring 20 of the dust suction head 19 is positioned in front of the chuck 42, and the mounting of the dust suction device 1 is completed. Here, the adjuster 23 on the rear surface of the dust collector 4 is not used.
Then, the plug 47 of the power cord 44 is inserted into the socket 37 of the drive unit 3, and the plug 36 of the dust suction device 1 is inserted into a commercial power outlet.

With the dust suction device 1 mounted and the interlocking switch 38 turned on, the switch lever 48 provided on the handle 43 of the vibration drill 40 is turned on by passing the bit attached to the chuck 42 through the ring 20 of the dust suction head 19. Then, the vibration drill 40 operates by obtaining a power source from a commercial power source via the dust suction device 1. When the controller 7 detects the power supply from the socket 37, the motor 5 is driven and the suction fan 8 rotates. Then, outside air is sucked from the dust suction head 19, reaches the dust collecting part 4 through the straight hose 18 and the flexible hose 17, passes through the filter 14, enters the accommodation chamber 9 through the communication hole 11, and passes through the exhaust port 12. Discharged outside. As a result, dust or the like generated in the vicinity of the bit is sucked into the dust suction head 19 together with the outside air, is sent to the dust collecting unit 4, is captured by the filter 14, and is stored in the dust box 13.

When the vibration drill 40 is stopped, the power supply from the socket 37 is stopped and the motor 5 of the dust suction device 1 is also stopped. However, the motor 5 is delayed for a predetermined time from the stop of the vibration drill 40 by the delay circuit described above. Since the operation stops, the dust remaining on the flexible hose 17 and the like is reliably sucked up to the dust collecting section 4.
On the other hand, when the interlock switch 38 is turned OFF, the motor 5 is driven regardless of whether the vibration drill 40 is used or not, and the dust suction device 1 is operated alone.

As described above, according to the dust suction device 1 of the above-described form, the housing 2 is provided with the socket 37 into which the commercial power is supplied and the plug 47 of the vibration drill 40 can be inserted. Can be given a dust-absorbing function and has excellent versatility. Further, for example, even when there is only one outlet of a commercial power source at the site, the vibration drill 40 and the dust suction device 1 can be reliably used at the same time, and the usability is improved.

Further, here, since the motor 5 is operated in conjunction with the supply of commercial power from the socket 37, it is not necessary to perform ON / OFF operation of the dust suction device 1 each time the vibration drill 40 is used. The usability is further improved and the dust suction device 1 is operated only when necessary, which leads to saving of electric energy.
Furthermore, by providing the adjuster 23 in the housing 2, it is possible to easily attach the power drill such as the vibration drill 40 to the power tool, which is convenient for simultaneous use with the power tool. In particular, since the position of the adjuster 23 can be adjusted by sliding, it is possible to mount the adjuster 23 appropriately according to the form of the power tool.

In the dust suction device, the direction of the motor, the position of the suction fan, the filter, and the like are not limited to the above forms. For example, the suction fan may be provided on the second shaft that is transmitted from the output shaft without being provided on the output shaft of the motor. The positions of the socket and the interlock switch can be changed as appropriate.
Also, in conjunction with the motor power tool, the delay time when the power tool is stopped can be appropriately increased or decreased, and the motor can be stopped substantially simultaneously without delay. Of course, it is possible to provide a dedicated operation switch without interlocking and arbitrarily select ON / OFF.

Further, the number and position of the mounting means and the adjusters are not limited to the above-mentioned form, and the structure itself is provided with a belt directly on the housing without slide adjustment, or a pair of clamp bodies that open and close in half instead of the belt. As long as the power tool can be attached to the power tool, it can be appropriately changed. However, the mounting means does not necessarily have to be attached to the dust suction device, and it is of course possible to integrate the electric tool placed on the dust suction device by a mounting means such as a belt separate from the dust suction device.

The electric power tool is not limited to the vibration drill, and other types such as a hammer drill and a driver can be mounted with the dust suction device. For example, in a hammer drill in which the housing is not L-shaped and accommodates an upward motor below the center of the housing, if the hammer drill housing is mounted on the upper surface of the dust collecting part and attached to the dust suction device, it is stable. Integrated in a state. In addition, it is also conceivable to form a recess into which the housing on the power tool side is fitted on the outer surface of the housing of the dust suction device.

It is a side view of a dust suction device. It is a top view of a dust suction device. (A) is a front view of a dust suction device, (B) is a rear view. It is AA sectional view taken on the line. It is explanatory drawing of an adjuster, (A) shows a front surface, (B) shows a side surface, (C) shows a bottom surface, respectively. It is a BB sectional view. It is a side view of the dust suction apparatus with which the vibration drill was mounted | worn. It is a top view of the dust suction device with which the vibration drill was equipped. It is sectional drawing of the dust suction apparatus with which the vibration drill was mounted | worn.

Explanation of symbols

1 .... Dust-absorbing device for electric tool, 2 .... Housing, 3 .... Drive part, 4 .... Dust collecting part, 5 .... Motor, 6 .... Output shaft, 7 .... Controller, 8 .... Suction fan, 9. ..Containment chamber, 12 ..Exhaust port, 14 ..Filter, 15 ..Suction port, 17 ..Flexible hose, 19 ..Dust suction head, 23 ..Adjuster, 24 ..Slide plate, 25. 26 ·· Belt, 29 ·· Claw, 30 · · Coil spring, 31 · · Locked portion, 35 · · Power cord, 36 · · Plug, 37 · · Socket for power supply, 38 · · Interlocking switch, 40 · · · Vibrating drill, 41 · · Housing, 43 · · Handle, 44 · · Power cord, 47 · · Plug.

Claims

A dust collector for an electric tool,
A housing attachable to the electric tool;
A motor driven by a commercial power source;
A suction fan that rotates by driving the motor;
A filter located upstream of the suction fan;
A power supply socket to which the commercial power is supplied and into which a power plug of the electric tool can be inserted, and
Along with the rotation of the suction fan, outside air is sucked from a hose member connected to the housing on the upstream side of the filter, and after passing through the filter, is discharged from an exhaust port provided in the housing,
An electric tool dust suction device for supplying the commercial power to the electric tool having the power plug inserted into the electric power supply socket.
The dust suction device for an electric tool according to claim 1, wherein the motor is operated in conjunction with supply of commercial power from the power supply socket.
3. The dust collecting device for an electric tool according to claim 2, wherein an interlocking switch for switching between an independent operation of the dust collecting device for the electric tool and an interlocking operation with the electric tool is provided in the housing.
4. The dust suction device for an electric tool according to claim 3, wherein when the electric tool is stopped in the interlocked operation state, the motor stops after operating for a predetermined time.
The dust suction device for an electric tool according to claim 1, wherein the housing is provided with means for attaching to the electric tool.
The mounting means includes a slide plate provided slidably on the surface of the housing, a V-shaped mount provided on the slide plate, and belts provided at both ends of the mount. Item 6. A dust collector for an electric tool according to Item 5.
7. The power tool according to claim 6, wherein the slide plate is slidable by fitting protrusions provided at both ends of the slide plate to rails provided at both ends of the housing. Dust absorber.
Inside the slide plate, a pair of claws are urged in a projecting direction from both ends of the slide plate, and a latched portion is provided on the inner surface of the rail to latch the projecting claws. The dust suction device for an electric tool according to claim 7.
The dust collecting device for an electric tool according to claim 8, wherein an operation portion exposed through a window formed in the slide plate is provided on the claw.
The dust suction device for an electric tool according to claim 1, wherein a dust box is detachably provided on the upstream side of the suction fan in the housing, and the filter is accommodated in the dust box.
An electric tool comprising the electric tool dust suction device according to claim 1.