JPH0723209Y2 - Dust collector for drilling tools - Google Patents

Description

[Detailed Description of the Invention] [Field of Utilization of the Invention] The present invention relates to a dust collecting device such as a hammer drill used for boring concrete or the like.

[Background of the invention]

A large amount of dust was generated when drilling holes in concrete such as hammer drills. In order to collect this dust, a dust collecting device has been conventionally attached to the body of a hammer drill or the like. In conventional dust collectors such as hammer drills, since the dust cover with the suction port for sucking dust is made of one molded product, the part that supports the entire suction port with screws and the dust collecting device Since the part having the attachment port of the dust hose was provided separately, it was not possible to reduce the thickness of the inside of the suction port, and it was not possible to provide the dust passage inside the suction port. In order to eliminate such a defect, a dust cover may be divided and molded, but the number of parts is large and the dust cover is expensive.

[Purpose of device]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to prevent the dust collecting cover from coming off and rotating from the dust collecting pipe with a simple structure. Another object of the present invention is to provide an inexpensive dust collecting apparatus for a drilling tool, which can surely fit a separable dust collecting cover with a simple structure and has a small number of parts.

[Outline of device]

According to the present invention, the engaging portion between the dust collecting cover and the dust collecting pipe is provided with unevenness so as to prevent the dust collecting cover from coming off the dust collecting pipe, and the detent portion provided on the outside of the dust collecting pipe inside the dust collecting cover. With a simple structure to securely hold the dust collecting cover against the dust collecting pipe by holding the dust collecting cover, the shape of the dust collecting cover and dust collecting pipe has been devised. is there.

[Example of device]

A dust collecting apparatus for a drilling tool according to the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view showing an embodiment of a hammer drill having a dust collecting apparatus according to the present invention, and FIG. 2 is a plan view showing an embodiment of a hammer drill having a dust collecting apparatus according to the present invention. FIG. 4 is a partially enlarged vertical side view of the dust collecting apparatus according to the present invention, FIG. 4 is a sectional view taken along the line I--I of FIG.
FIG. 5 is a sectional view taken along line II-II in FIG.

1 to 5, a large amount of dust is generated when a drill bit 2 rotated by a motor built in the electric tool main body 1 is pressed against a work material (concrete or the like) while drilling. In addition to the motor, a casing, a fan, etc. (not shown) are built in the electric tool main body 1, and the electric tool main body 1 is configured to suck and discharge air by the rotation of the motor. A side handle 3 is fixedly provided on the power tool body 1, and a dust collecting pipe cover 5 is attached to the side handle 3 via a holder 4. Incidentally, the holder 4 is configured so that the dust collecting pipe cover 5 can be fixed at an arbitrary position. A dust collecting pipe 6 is inserted into the dust collecting pipe cover 5 so as to be movable in the axial direction of the drill bit 2 and non-rotatably, and a spring for constantly urging the dust collecting pipe 6 toward the drill bit 2 side.
16 is disposed between the dust collecting pipe cover 5 and the dust collecting pipe 6, and the rear end of the spring 16 is held by the tail cap 13. In order to prevent the dust collecting pipe 6 from coming off the dust collecting pipe cover 5 due to the urging force of the spring 16, the dust collecting pipe cover 5 and the dust collecting pipe 6 have a retaining means at the abutting portion. Dust collecting covers 8 and 9 which are provided perpendicularly to the axis of the drill bit 2 and which can cover the drill bit 2 are provided at one end of the dust collecting pipe 6. Suction ports 20 for sucking dust are formed in the and 9, respectively. A dust collecting hose 14 is connected to the other end of the dust collecting pipe 6, the other end of the dust collecting hose 14 is connected to the electric tool main body 1, and the dust sucked from the suction port 20 is discharged to the dust bag 15. I'm collecting it.

Next, referring to FIG. 3, the dust collecting cover 8 forming the suction port 20
The configuration of the dust collecting cover 9 will be described. In order to surely fit the dust collecting covers 8 and 9 divided into two from the substantially center, the engaging means of the claw portion 9a and the engaging portion 8a shown in FIGS. 4 and 5 is used. The divided dust collecting cover 9 is provided with a claw portion 9a, and the further divided dust collecting cover 8 is provided with a locking portion 8a for engaging with the claw portion 9a so that both dust collecting covers 8 and 9 are fitted. Can be matched. In the embodiment of the present invention, a screw 10 is used in addition to the above locking means to fit the dust collecting covers 8 and 9 together. Whether the screw 10 is used or not is determined by the arrangement of the claws 9a and the locking portions 8a and the number of locking.

Further, a link 12 is provided in the suction port 20, but this ring 12 is for preventing the suction port 20 from being scraped when the drill bit 12 shakes and is a rubber formed of an elastic body. The cap 11 is provided to improve the dust collection efficiency. Further, the abutting surfaces of the dust collecting covers 8 and 9 can be made into a concave and convex inlay type instead of a flat surface.

Next, the configurations of the retaining portion 21 and the rotation preventing portion 22 of the dust collecting covers 8 and 9 for the dust collecting pipe 6 will be described. By engaging the convex portion 8a formed inside the dust collecting cover and the concave portion 6a formed outside the dust collecting pipe 6, the dust collecting cover 6 is prevented from coming off from the dust collecting pipe 6 and is also covered. By engaging the detent portion 22 formed on the inner side of the dust collecting portion and the detent portion 22 formed on the outer side of the dust collecting pipe, the dust collecting cover can be prevented from rotating against the dust collecting pipe 6. 8 and 9 are holding one end of the dust collecting pipe 6.

[Effect of device]

According to the present invention, by engaging the uneven portion formed inside the dust collecting cover and the uneven portion formed outside the dust collecting pipe, the dust collecting cover is prevented from coming off from the dust collecting pipe, In addition, by engaging the detent portion formed inside the dust collecting cover with the detent portion formed outside the dust collecting pipe, the dust collecting cover can be prevented from rotating against the dust collecting pipe. Since the cover is configured to hold one end of the dust collecting pipe, the dust collecting cover can be reliably prevented from coming off and rotating with respect to the dust collecting pipe with a simple structure.

Further, since the claw portion is provided on one of the divided dust collecting covers, and the engaging portion for engaging with the claw portion is provided on the other divided one, the fitting of the dust collecting cover which can be divided into Since it is not necessary to do everything with screws and the number of screws required for fitting can be reduced, the number of parts can be reduced, and an inexpensive dust collecting apparatus for a drilling tool can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a hammer drill having a dust collecting apparatus according to the present invention, and FIG. 2 is a plan view showing an embodiment of a hammer drill having a dust collecting apparatus according to the present invention. The figure shows a partially enlarged vertical side view of the dust collector according to the present invention.
FIG. 4 is a sectional view taken along the line II of FIG. 3, and FIG. 5 is II of FIG.
It is a II sectional view. In the figure, 1 is a power tool body, 2 is a drill bit, 3
Is a side handle, 4 is a holder, 5 is a dust collecting pipe cover, 6 is a dust collecting pipe, 6a is a recess, 8 is a dust collecting cover,
8a is a convex portion, 8b is a locking portion, 9 is a dust collecting cover, 9a is a claw portion,
Reference numeral 21 is a retaining portion, and 22 is a rotation preventing portion.

Claims (2)

[Scope of utility model registration request] 1. A power tool body to which a drill bit is attached, a side handle fixably provided to the power tool body, a dust collecting pipe cover mounted on the side handle via a holder, and the dust collecting pipe cover. A dust collecting pipe inserted in the dust pipe cover so as to be movable in the axial direction of the drill bit and non-rotatably provided, and provided at one end of the dust collecting pipe and perpendicular to the axis of the drill bit. In a dust collecting device for a drilling tool, comprising: a dust collecting cover that can be freely divided, and a suction port that is provided in the dust collecting cover and covers the drill bit, the uneven portion formed inside the dust collecting cover and the dust collecting cover. Engagement with the uneven portion formed on the outer side of the dust pipe prevents the dust collecting cover from coming off from the dust collecting pipe, and the rotation formed on the inner side of the dust collecting cover. By engaging the stopper portion and the detent portion formed on the outer side of the dust collecting pipe, the dust collecting cover can prevent the dust collecting cover from rotating with respect to the dust collecting pipe. A dust collecting device for a drilling tool, characterized by holding one end. 2. A drilling tool according to claim 1, wherein a claw portion is provided on one of the divided dust collecting covers, and an engaging portion for engaging with the claw portion is provided on the other divided one. Dust collector.