JP2008018525A - Powder dust collecting device of portable boring machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collecting device for a portable punching machine, capable of preventing durability from degrading due to dust generated during punching, attaining preferable visibility, and being applied to a small punching machine. <P>SOLUTION: This device has a flexible pipe 7 which is attached to a top edge portion of the portable punching machine 11 so as to surround the drill from the outside, a retaining ring 2 which is attached at an outer periphery of the top edge portion of the flexible pipe 7, a support body 3 which is jointed with the retaining ring 2 and extended along the outer side of the flexible pipe 7, and an auxiliary ring 4 which is jointed with the support body 3 at the middle portion of the flexible pipe 7 in the longitudinal direction. The flexible pipe 7 is made by transparent material, a base portion thereof is attached at a non-rotating portion of the top edge portion of the portable punching machine 11, and the contraction limit of the flexible pipe 7 is determined by the length of the support body 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dust collecting device to be used by being mounted on a portable drilling machine, and a portable bellows-type collector is attached to the upper end of the portable drilling machine to collect dust generated by the drilling work. By making the drilling machine downward, the collected dust can be discarded at any time.

In general, when various kinds of work such as electrical work, facility work, and steel frame work are performed on a building wall made of concrete, a hole is drilled using a portable drilling machine to which a drill is fastened, and various fixtures are attached to the hole. Fix it.
When drilling holes in the ceiling with a portable drilling machine, dust is generated by the drill cutting the concrete. Accordingly, carelessness can cause dust to enter the eyes, nose, ears, and mouth, which is a health hazard.

  Therefore, a dustproof device to be attached to the punching device has been proposed. For example, the invention described in Patent Document 1 is one of them, and one end of a bellows-like flexible pipe is attached to the chuck portion of the drilling machine so as to cover the outside of the drill attached to the chuck of the drilling machine. . A ball bearing is interposed between the chuck portion and the flexible pipe so that the flexible pipe does not rotate with respect to the rotation of the chuck portion.

  According to the invention described in Patent Document 1, there is a problem that, when trying to correspond to a long drill, the flexible pipe becomes long, which is uneconomical and cumbersome to handle. Therefore, there has been proposed a dustproof cover for a drilling device in which a flexible pipe shorter than the length of the drill is used, and a base portion of the flexible pipe is attached to a middle portion in the length direction of the drill via a bearing (see Patent Document 2). .

Japanese Utility Model Publication No. 6-85711 JP 2001-54837 A

  In both the invention described in Patent Document 1 and the invention described in Patent Document 2, a ball bearing or the like is interposed in order to rotate the chuck portion or the drill relative to the flexible pipe. There is a disadvantage that it penetrates into the interior and is inferior in durability. In addition, the drill cannot be viewed with the flexible pipe during the drilling operation, and the hole position and the depth of the hole are not known. Furthermore, since the invention described in Patent Document 2 connects the flexible pipe to the middle of the length direction of the drill via a bearing so as to be relatively rotatable, it is difficult to apply to a small drilling machine.

  The present invention was invented to solve the above-mentioned problems, and the dust storage device is configured by using a bellows-like flexible pipe. Durability is hindered by dust generated during drilling. It is an object of the present invention to provide a dust collecting device for a portable drilling machine that has good visibility and can be applied to a small drilling machine.

  The present invention relates to a bellows-like flexible pipe that is attached to the tip of a portable drilling machine by enclosing a drill from the outside, a holding ring attached to the outer periphery of the tip of the flexible pipe, and a flexible pipe coupled to the holding ring. A support body extending along the outside of the flexible pipe, and an auxiliary ring coupled to the support body at a longitudinal intermediate portion of the flexible pipe, the flexible pipe being made of a transparent material and having a base end portion Is mounted on a non-rotating portion at the tip of a portable drilling machine, and the main feature is that the reduction limit of the flexible pipe is determined by the length of the support.

  The present invention also provides a bellows-like flexible pipe attached to the tip of a portable drilling machine by enclosing the drill from the outside, a holding ring attached to the outer periphery of the tip of the flexible pipe, and a flexible coupling coupled to the holding ring. A support body extending along the outside of the pipe, and an end plate coupled to the base end portion of the flexible pipe. The flexible pipe is made of a transparent material, and the base end portion is the end plate. At the same time, it is mounted on a non-rotating portion at the tip of the portable punch, and a slit is formed in the length direction of the support, and a guide pin provided on the end plate is fitted into the slit. The reduction limit of the flexible pipe is defined within a range that can move along the slit.

Drilling is performed by rotating the trill while pressing the retaining ring attached to the tip of the flexible pipe against the wall surface. Dust generated by the drilling operation is accommodated in the flexible pipe. Since the base of the flexible pipe is attached to the non-rotating part of the drilling machine, the dust accommodated in the flexible pipe does not hinder the rotation of the drill with respect to the flexible pipe. The structure is simple and easy to manufacture, and the manufacturing cost can be reduced. The position of the drill and the depth of the hole being drilled can be viewed through a transparent flexible pipe. As the depth of the hole increases, the flexible pipe shrinks and does not hinder drilling operations.
In the case of drilling obliquely with respect to the wall surface, the retaining ring tilts and makes a line contact with the wall surface in a circular shape, and the flexible pipe follows this, so that dust generated by the drilling can be effectively stored in the flexible pipe.

Embodiments of a dust collecting device for a portable perforator according to the present invention will be described below with reference to the drawings.
1 to 4, in a collecting apparatus that is attached to the tip of a portable punching machine and collects dust, the dust collecting apparatus main body 1 is mainly composed of a highly durable bellows-like flexible pipe 7. A fixing ring 2 is fixed to one end portion of the flexible pipe 7. The fixing ring 2 is an annular member having a through-hole formed at the center, and the upper end portion of a plate-like support 3 facing in the vertical direction is coupled to the outer surface of the fixing ring 2 by a screw. Two supports 3 are coupled to the outer peripheral surfaces of the fixing ring 2 opposite to each other as a pair. An auxiliary ring 4 having an outer diameter equal to the outer diameter of the fixing ring 2 is fixed to the intermediate portion and the lower end portion of each support 3. The auxiliary ring 4 is on the outer peripheral side of the flexible pipe 7 and surrounds the outer periphery of the flexible pipe 7.

A small-diameter cylindrical portion is integrally formed at the other end of the flexible pipe 7, and at the lower end in the figure, and a fixture 5 for fixing the flexible pipe 7 to the drill chuck is installed on the outer periphery of the cylindrical portion. . The fixture 5 is formed by bending an elastic plate into an arc shape, and by inserting a fixing screw 6 at both ends and screwing a nut into the fixing screw 6, the cylindrical portion of the flexible pipe 7 is drill chucked. It is configured to be coupled to. However, a dust detachment preventing packing 8 is fastened to the inside of the cylindrical portion of the flexible pipe 7, and the packing 8 is in close contact with the drill chuck so that the dust contained in the flexible pipe 7 does not leak outside. . Reference numeral 11 denotes a portable punch. A lower end portion, that is, a base end portion of the flexible pipe 7 is configured to be attached to a non-rotating portion at a distal end portion of the portable punch 11. Therefore, it is not necessary to interpose a ball bearing or the like between the proximal end portion of the flexible pipe 7 and the distal end portion of the portable drill 11. The flexible pipe 7 is mounted so as to surround the drill fastened to the chuck of the portable drilling machine 11. The flexible pipe 7 is made of a transparent material so that the drill can be visually recognized through the flexible pipe 7. ing.
The reduction limit of the flexible pipe 7 is determined by the length of the support 3.

  5 and 6 show another embodiment of the present invention. On the other hand, an end plate 9 is fastened between the fixture 5 and the flexible pipe 7 at the other end (the lower end in FIGS. 5 and 6) of the flexible pipe 7 having the fixing ring 2 at the tip. 9 and the holding ring 2, the support body 3 is arrange | positioned, and the support body 3 and the holding ring 2 are fastened with the fixing screw. The support 3 fastened to the holding ring 2 is formed with slits 10 in the vertical direction, that is, in the vertical direction in the figure, and a guide pin fixed to the end plate 9 penetrates the slit 10 and is integrated with the guide pin. The end plate 9 can move along the slit 10. Therefore, the reduction limit of the flexible pipe 7 is determined within a range in which the end plate 9 integrated with the guide pin can move along the slit 10.

The operation of the embodiment described above is as follows. After fastening and fixing a drill to a drill chuck attached to the tip of the portable punch 11, one end (lower end in the figure) of the flexible pipe 7 constituting the main body of the dust collecting device 1 is fixed to the portable punch 11. Fastened with the tool 5. More specifically, the small-diameter cylindrical portion of the lower end portion of the dust collector main body 1 is fitted into the outer periphery of the non-rotating portion of the distal end portion of the portable drilling machine 11, and then the fixing tool 5 is tightened using the fixing screw 6. The flexible pipe 7 is fastened to the portable punch 11.
Since a packing 8 made of rubber or the like is interposed between the fixture 5 and the portable punch 11 so that dust does not escape, the dust remains inside the flexible pipe 7 without leaking outside. Yes.

  In the state where the dust collecting device 1 is mounted on the portable drilling machine 11 as described above, when the drill tip of the portable drilling machine 11 is applied to the wall or ceiling of the building and the drilling operation is performed, the portable drilling machine 11 is installed. The holding ring 2 of the dust collector main body 1 is in close contact with a surface to be drilled such as a wall or a ceiling. In this state, the portable drilling machine 11 is started and a hole is drilled by rotationally driving the drill. Since the position of the drill and the depth of drilling can be visually recognized through the flexible pipe 7 made of a transparent body, a hole with high positional accuracy and depth accuracy can be drilled.

  As the drilling by the drill proceeds, the tip of the portable drilling machine 11 moves toward the drilling target surface, and the lower end of the flexible pipe 7 moves together, and the space defined by the drilling target surface and the flexible pipe 7 is increased. Maintain a concealed state.

  If the drilling target surface is the ceiling surface of the building and a hole is drilled in the drilling target surface with a drill as described above, the portable drilling machine 11 is pulled back and the drill is pulled out. Depressed. It may be used after throwing away the dust accumulated at the bottom of the flexible pipe 7.

In a state where the dust collecting apparatus main body 1 is mounted, it may be necessary to tilt the portable punch 11 and make a hole obliquely on the drilling target surface. When the drill of the portable drilling machine 11 is applied obliquely to the ceiling of the building or the like, the holding ring 2 installed at the upper end of the flexible pipe 7 comes into close contact with the drilling target surface in a circular line, and at the same time, the support 3 The flexible pipe 7 is pushed in one direction by the auxiliary ring 4 coupled to the, and a portion of the flexible pipe 7 that is not regulated by the auxiliary ring 4 is tilted to prevent the internal space of the flexible pipe 7 from being opened. Therefore, the dust generated by the perforation collects inside the flexible pipe 7 without leaking to the outside.
In the embodiment shown in FIGS. 5 and 6, the bottom plate 9 can change the posture in the slit 10 of the support 3, so that a hole can be formed obliquely on the surface to be drilled.

  On the other hand, the fixture 5 is fastened to the front end portion of the portable drilling machine 11 to which the drill is fastened, with the packing 8 installed on one side of the flexible pipe 7 of the dust collecting apparatus main body 1 interposed. If the portable drilling machine 11 is operated in such a state and drilling is performed on the wall or ceiling of the building with a drill, the retaining ring 2 installed in the dust collector main body 1 installed in the portable drilling machine 11 is placed on the ceiling. The drill that is in close contact and fastened to the portable drilling machine in this state pierces the hole.

  The drill integrated with the portable drill 11 advances while the drill drills a hole in the ceiling or the like, and a guide pin of the base plate 9 is placed on the upper end of the slit 10 of the support 3 installed between the fixing ring 2 and the base plate 9. By hitting, it becomes the advance limit of the portable drill 11 and the drill. In the meantime, the flexible pipe 7 shrinks and the internal space is kept closed. Therefore, the stored dust is prevented from leaking to the outside.

It is a disassembled perspective view which shows one Example of the dust collection apparatus of the portable drilling machine which concerns on this invention. It is a perspective view of the said Example. It is a longitudinal cross-sectional view of the said Example. It is a side view which shows the mode of the drilling operation | work by the portable drilling machine equipped with the dust collecting apparatus concerning the said Example. It is a side view which shows the mode of the drilling operation | work by the portable drilling machine equipped with another Example of the dust collection apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows another Example of the dust collection apparatus of the portable drilling machine which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collector main body 2 Holding ring 3 Support body 4 Auxiliary ring 7 Flexible pipe 8 Packing 9 End plate 10 Slit

Claims (3)

A dust collecting device that can be attached to the tip of a portable punch,
The dust collector is a bellows-like flexible pipe that is attached to the tip of the portable drilling machine by enclosing the drill from the outside, a holding ring attached to the outer periphery of the tip of the flexible pipe, and a flexible coupling coupled to the holding ring. A support extending along the outside of the pipe, and an auxiliary ring coupled to the support at the longitudinal intermediate portion of the flexible pipe;
The flexible pipe is made of a transparent material, and the base end portion is attached to the non-rotating portion of the distal end portion of the portable drilling machine,
A dust collecting apparatus for a portable drilling machine, wherein a reduction limit of the flexible pipe is determined by a length of the support. A dust collecting device that can be attached to the tip of a portable punch,
The dust collector is a bellows-like flexible pipe that is attached to the tip of the portable drilling machine by enclosing the drill from the outside, a holding ring attached to the outer periphery of the tip of the flexible pipe, and a flexible coupling coupled to the holding ring. A support extending along the outside of the pipe, and an end plate coupled to the proximal end of the flexible pipe;
The flexible pipe is made of a transparent material, and the base end portion is attached to the non-rotating portion of the distal end portion of the portable drilling machine together with the end plate,
A slit is formed in the length direction of the support,
Dust collection for a portable drilling machine, characterized in that a guide pin provided on the end plate is fitted into the slit, and the reduction limit of the flexible pipe is determined within a range in which the guide pin can move along the slit. apparatus.   The dust collecting apparatus for a portable drilling machine according to claim 1 or 2, wherein a dust detachment preventing packing that is in close contact with the non-rotating part of the distal end part of the portable drilling machine is attached inside the base end of the flexible pipe.

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