JP2002046075A - Chip suction device for electric driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the efficiency of the operation of driving a tapping screw 9 during roofing work by providing a chip suction device for an electric driver being small, lightweight with excellent portability and facilitating holding of the tapping screw during operation. SOLUTION: The chip suction device 1 for the electric driver comprises a telescopic cylinder 3 detachably attached to the body 21 of the electric driver 2 in such a manner as to surround a drive 22 at the end of the driver 2, and a suction cylinder 4 connected to a side of the telescopic cylinder 3 to communicate with the interior of the telescopic cylinder 3. The telescopic cylinder 3 includes a base cylinder 6 fixed to the body 21 of the driver 2 and an inner cylinder 7 inserted into the base cylinder 6, and the inner cylinder 7 is energized via a coil spring 8 so as to freely move into and out of the base cylinder 6. An air suction type cleaner 5 is connected to the suction cylinder 4 via an appropriate hose 51 or pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip suction device suitable for driving a tapping screw into a metal roofing material using an electric hand driver.

[0002]

2. Description of the Related Art Conventionally, in the roofing work of a general metal roof, a roof base material such as plywood or a roof support material such as a tight frame is arranged and fixed on a structural material of a roof frame. 2. Description of the Related Art There is an operation of driving a metal roofing material placed on a roofing material or a roofing material with a tapping screw (tapping screw) to fix the metal roofing material to a roof base material or a roofing support material.

FIG. 5 shows a tapping screw used by the present inventors for ordinary roofing work. This tapping screw 9
Has a cross-shaped hole 92 in the head 91, and a disc-shaped flange 93 having a larger diameter than the head 91 is integrated with the head 91 below the head 91 in order to enhance waterproofness of the driven portion. Is formed. Further, a cylindrical rubber packing 94 is fitted on the flange 93 side of the screw portion. Such a driving operation of the tapping screw 9 is usually performed using a rechargeable battery type or power supply type hand driver (hereinafter, referred to as an “electric driver”).

[0004]

When a tapping screw 9 is driven into a metal roofing material (hereinafter, simply referred to as a "roofing material"), chips of the roofing material or the roof support material cut by the tip of the tapping screw 9 are removed. If left on the roof, it quickly rusts and spreads rust on the roofing material itself, impairing the aesthetics and waterproofing of the roof. Therefore, an efficient means for removing the chips at the same time as the operation of driving the tapping screw 9 is required.

[0005] As a means for removing chips attached to a cutting tool such as a drill or a milling machine, various means using air suction have been proposed, but most of them are of an installation type, and the apparatus itself is large-sized. Yes, inconvenient to carry. For this reason, it is not suitable for practical use in roofing work that is performed while moving over a large area, particularly on a roof with an unstable scaffold. Further, in the roofing work, since the tapping screw 9 is driven into a thin roof material, less chips are generated compared to drilling or grooving by a drill or a milling machine. For this reason, even if the chip suction performance is low, it is required that the apparatus itself be small and lightweight and have excellent portability.

Further, in the roofing work, since a large number of tapping screws 9 are driven by an electric screwdriver, the tapping screws 9 are often not picked up with a fingertip and dropped. Therefore, a device that can easily hold the tapping screw 9 near the tip of the bit of the electric screwdriver is also required.

The present invention has been made in view of such circumstances, and has been made to improve the efficiency of tapping screw driving work in roofing work, and is small, lightweight, excellent in portability, and easy to hold the tapping screw during work. It is an object of the present invention to provide a chip suction device for an electric screwdriver configured as described above.

[0008]

In order to solve the above problems, a chip suction device for an electric screwdriver according to the present invention is detachably attached to a main body of the electric screwdriver so as to surround a driving portion at a tip of the electric screwdriver. An expansion / contraction cylinder and a suction cylinder connected to the side of the expansion / contraction cylinder and communicating with the interior of the expansion / contraction cylinder. The expansion / contraction cylinder has a base cylinder fixed to the main body of the electric driver and an inner side of the base cylinder. An inner cylinder that is inserted and held so as to be able to protrude and retract with respect to the base cylinder, and a coil spring that urges the inner cylinder toward the distal end of the driving unit.
Irrespective of the state of the inner cylinder appearing and retracting, communication holes communicating with the suction cylinder are always formed respectively, and the suction cylinder is configured to be connected to an air suction type vacuum cleaner via an appropriate hose or pipe. It is characterized by the following.

In the present invention, the driving portion of the electric screwdriver means a chuck portion that rotates at the tip of the electric screwdriver, and a bit (a cutting tool) such as a cross screwdriver bit attached to the chuck portion. However, the shape of the engaging portion between the tapping screw and the bit is not particularly limited to a cross hole.

According to the present invention, the drive unit is attached to the body of the electric driver by surrounding the drive unit by attaching the expandable tube to the drive unit, and connecting the air suction type vacuum cleaner to the suction tube to suck the inside of the expandable tube. Chips generated at the tip of the tapping screw set at the time of driving can be removed by suction from the telescopic cylinder via the suction cylinder. That is, the chip suction device of the electric screwdriver is an attachment that can be attached to and detached from the existing electric screwdriver, and by connecting the existing air suction cleaner through the chip suction device of the electric screwdriver, if necessary, Chips can be easily sucked.
Since the chip suction device has a simple structure including a telescopic tube and a suction tube, it is easy to reduce the size and weight and to enhance the portability. Therefore, it is suitable for practical use in roofing work.

In this chip suction device, the stroke of the inner cylinder is set such that the tip of the inner cylinder reaches the tip of the tapping screw set in the drive unit when it protrudes, and retracts from the tip of the drive unit when immersed. Is preferably set. According to this configuration, from the state where the tapping screw is set at the tip of the driving section and the driving of the tapping screw is completed to the state where the driving of the tapping screw is completed, the tip of the inner cylinder is always applied to the driving portion of the tapping screw. Can be in contact. Therefore, the chips can be reliably sucked without scattering the chips during the driving of the tapping screw.

It is preferable that the inner diameter of the inner cylinder is formed to be 1 mm to 3 mm larger than the maximum outer diameter of the tapping screw set in the driving section. That is, if the inner diameter of the inner cylinder is set to a range that is not too much larger than the outer diameter of the tapping screw, the tapping screw itself can be constantly attracted to the tip of the driving unit by the suction force of the air suction type vacuum cleaner. it can. Thereby, the tapping screw does not fall off during the work, and one hand of the worker is also free, so that the workability of the roofing work is improved.

Regarding the difference between the inner diameter of the inner cylinder and the maximum outer diameter of the tapping screw in the present invention, chips generated at the tip of the tapping screw can be sucked without any trouble, and the tapping screw can be sucked by air suction. It is selected as a size that can be properly suctioned and held by the suction force of the vacuum cleaner, but this size is slightly increased or decreased depending on the suction force of the air suction type vacuum cleaner and the size and weight of the tapping screw used. You may.

In this chip suction device, the telescopic cylinder may be formed so that the inner cylinder can be exchanged. According to this configuration, even when the length of the tapping screw and the length of the bit are different, it is possible to select an inner cylinder having a length that is easy to use according to each.

In this chip suction device, a cushioning material made of a soft resin or synthetic rubber may be attached to a tip of the inner cylinder. According to this configuration, even if the tip of the inner cylinder abuts on the surface of the roofing material, the roofing material is not damaged,
The surface coating and waterproof coating of the roofing material can be protected.

In the chip suction device, the inner cylinder may be made of a transparent synthetic resin. According to this configuration, since the tapping screw driving portion can be seen through the transparent inner cylinder, the operator can easily confirm the driving position and driving status of the tapping screw.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show a chip suction device 1 for an electric screwdriver according to the present invention and a mode of use thereof. 3 and 4 show a chip suction device 1 for an electric screwdriver according to the present invention.
FIG. 3 is an axial sectional view in a use state of FIG.

The chip suction device 1 comprises a telescopic tube 3 attached to a main body 21 of an electric screwdriver 2 and a suction tube 4 connected to the side of the telescopic tube 3.
The air suction type vacuum cleaner 5 is connected via a hose 51, a pipe or the like having appropriate flexibility.

The telescopic cylinder 3 is a member having a double structure consisting of a base cylinder 6 and an inner cylinder 7.
It is detachably attached to the main body 21 of the electric screwdriver 2 so as to surround the (chuck portion 23 and the bit 24).

The base cylinder 6 is formed so that its base end side edge 61 conforms to the shape of the main body 21 of the electric screwdriver 2 and is fitted into the main body 21 of the electric screwdriver 2.
The screwdriver 62 is fixed to the main body 21 of the electric screwdriver 2 by tightening fixing screws 62 attached to three to four places on the outer periphery of the electric screwdriver. An annular rib 63 protruding from the inner surface is formed near the distal end of the base cylinder 6.

The inner cylinder 7 is a cylinder having an inner diameter slightly larger than the maximum outer diameter of the tapping screw 9 used for the driving operation. The outer diameter of the inner cylinder 7 is slightly smaller than the inner diameter of the annular rib 63 of the base cylinder 6. And the inner diameter of the inner cylinder 7 is slightly larger than the outer diameter of the chuck portion 23. The inner cylinder 7 is inserted into the base cylinder 6 and held so as to protrude and retract from the base cylinder 6 in the axial direction. A stepped portion 71 having an increased diameter is formed in the vicinity of the front end side edge of the inner cylinder 7. In addition, a cushioning member 72 made of synthetic rubber is attached to the front end side edge of the inner cylinder 7.

A coil spring 8 is fitted on the outside of the inner cylinder 7. The coil spring 8 has a stepped portion 71 of the inner cylinder 7 at both ends.
And the annular rib 63 of the base cylinder 6 to be held in a compressed state. Thereby, the inner cylinder 7 is urged to protrude toward the distal end with respect to the base cylinder 6.

A guide groove 73 extending in the axial direction is formed on the outer surface of the inner cylinder 7. On the other hand, a guide bolt 64 protruding from the inner surface of the base cylinder 6 is attached to the tip side of the base cylinder 6.
Is engaged. Thereby, the rotation of the inner cylinder 7 around the axis is restricted, and the stroke of the inner cylinder 7 with respect to the base cylinder 6 is restricted within a certain range. In this embodiment, the retracting stroke of the inner cylinder 7 is set such that the distal end of the inner cylinder 7 extends and retracts at least from the distal end of the bit 24 to the distal end of the tapping screw 9 set on the bit 24. However, the retracting stroke of the inner cylinder 7 may be set to be larger than the above-described retracting range.

The suction tube 4 is a tube bent approximately in an elbow shape.
One end is connected to the side surface of the base cylinder 6, and the other end is formed so that the hose 51 of the air suction type vacuum cleaner 5 and the like can be inserted. In the vicinity of the edge on the side where the hose 51 and the like are inserted, a cutout portion 41 for imparting some elasticity to the inserted portion is formed.

A communication hole 65 is formed in the base cylinder 6 so as to face the position where the suction cylinder 4 is connected.
Communicates with the inside of A communication hole 74 is also formed in the inner cylinder 7 at a position overlapping with the communication hole 65 formed in the base cylinder 6, and the inside of the inner cylinder 7, the inside of the base cylinder 6, and the suction cylinder 4 are formed.
Communicates with the inside of The communication hole 74 of the inner cylinder 7 is cut out from the base end side edge of the inner cylinder 7 in a U-shape in a side view.
The communication hole 65 of the base cylinder 6 even when the
Are formed so as to overlap each other with a certain opening area or more.

In order to drive the tapping screw 9 using the chip suction device 1 of the electric screwdriver, first, the telescopic cylinder 3 of the chip suction device 1 is attached to the main body 21 of the electric screwdriver 2 and the suction cylinder 4 Is connected to the air suction type vacuum cleaner 5, and the power supply of the air suction type vacuum cleaner 5 is turned on. Then, the distal end portion of the telescopic cylinder 3 of the chip suction device 1 is always in a negative pressure state. The type of the air suction type vacuum cleaner 5 is not particularly limited, but when working while moving on a roof, a rechargeable battery type is more portable than a power supply type.

When the tapping screw 9 used for the driving operation is set at the tip of the bit 24 of the electric screwdriver 2, the tapping screw 9 is attracted to the tip of the bit 24 by the suction force of the air suction type cleaner 5, so that the tapping screw 9 does not need to be held by the fingertip. Bit 24
Will not fall off the tip.

Then, as shown in FIG. 3, when the tip of the inner cylinder 7 is pressed against the driving position of the tapping screw 9 and the tapping screw 9 is driven while the electric screwdriver 2 is driven, the inner cylinder 7 is driven.
With its tip abutting on the roofing material R, it sinks into the base cylinder 6 according to the driving depth of the tapping screw 9. Since the inside of the inner cylinder 7 is always in a negative pressure state, chips generated by the driving of the tapping screw 9 pass through the gap between the flange 93 of the tapping screw 9 and the inner cylinder 7 and from the inside of the base cylinder 6 to the suction cylinder. 4 and is collected by an air suction cleaner 5.

As described above, the chip suction device 1 of the electric screwdriver 2 of the present invention can be easily used as an attachment that can be attached to and detached from the existing electric screwdriver 2, and is connected to an appropriate air suction cleaner 5. As a result, chips can be reliably sucked. Since the chip suction device 1 has a simple structure including the telescopic tube 3 and the suction tube 4, it is easy to reduce the size and weight. Therefore, it is suitable for use in roofing work requiring portability.

In the chip suction device 1, the stroke of the tip of the inner cylinder 7 is set to be equal to or more than the range from the tip of the bit 24 to the tip of the tapping screw 9 set on the bit 24. From the driving start state of 9 to the driving completed state, the chips can be reliably sucked without scattering the chips.

Further, if the inner diameter of the inner cylinder 7 is formed to be slightly larger than the maximum outer diameter of the tapping screw 9, the tapping screw 9 is always attracted to the tip of the bit 24 by the suction force of the air suction type vacuum cleaner 5. I can put it. Thus, the tapping screw 9 does not fall off during the work, and one hand of the worker is also free, so that the workability of the roofing work is improved. It is practically preferable that the inner diameter of the inner cylinder 7 is formed to be about 1 mm to 3 mm larger than the outer diameter (actually, more than ten millimeters) of the flange 93 of the tapping screw 9.

Further, the inner cylinder 7 of the telescopic cylinder 3 can be exchangeable for one having a different length. According to this configuration, even when the length of the tapping screw 9 and the length of the bit 24 are different, it is possible to select the inner cylinder 7 having a length that is easy to use according to each.

In the above-described embodiment, since the cushioning member 72 is attached to the tip of the inner cylinder 7, even if the tip of the inner cylinder 7 contacts the surface of the roof material R, the roof material R is not damaged. Without attaching, it is possible to protect the surface coating and waterproof coating of the roofing material R.

When the tapping screw 9 is driven into the roofing material R using the chip suction device 1 of the electric screwdriver 2 of the present invention, the driving position of the tapping screw 9 on the surface of the roofing material R is Surrounded by the tip and hidden from the operator. However, the roof base material or the roof support material F for fixing the roof material R is not usually such that the accuracy of the driving position of the tapping screw 9 is strictly determined in mm units. Even if you use
A material width for fixing the roof material R of about several tens mm is secured. Therefore, there is no practical problem even if the tip of the tapping screw 9 is not visible at the time of driving. However, it is also possible to form the inner cylinder 7 from a transparent synthetic resin so that the tip of the tapping screw 9 can be seen by an operator.

A fixing member for fixing the chip suction device 1 to the main body 21 of the electric screwdriver 2 is provided separately from the base cylinder 6 at the base end side edge portion 61 of the base cylinder 6. On the other hand, the entire telescopic cylinder 3 may be formed so as to be rotatable around the axis. According to this configuration, during the operation of driving the self-tapping screw 9, the suction tube 4 and the hose 51 can be appropriately rotated to the side that does not interfere with the operator, so that the workability is further improved.

Although the above description has been made in connection with the roofing work of metal roofing material, the chip suction device 1 of the present invention is
In addition to the roofing work, tapping screws are installed, for example, assembling a wall frame composed of lightweight steel members, attaching a metal outer wall material to an outer wall foundation, and attaching an aluminum fitting to a wall opening. Of course, it can be used for other purposes.

Further, the chip suction device 1 of the present invention can be applied not only to the tapping screw 9 having the shape shown in FIG. 5 but also to other general tapping screws having a cutting edge at a tip end capable of piercing a metal material. It is.

[0039]

According to the chip suction device of the electric screwdriver of the present invention, the expansion / contraction cylinder is attached to the main body of the electric screwdriver to surround the drive unit, and the suction cylinder is connected to the air suction type vacuum cleaner. By sucking the inside, the chips generated at the tip of the tapping screw set in the drive unit at the time of driving can be removed by suction from the telescopic cylinder via the suction cylinder.

The chip suction device of the present invention can be used as an attachment that can be attached to an existing electric screwdriver and an existing air suction type vacuum cleaner, and it is possible to enhance portability by reducing the size and weight. It greatly contributes to improving the workability of roofing work.

Further, by setting the inner diameter of the inner cylinder to an appropriate range which is not too much larger than the outer diameter of the tapping screw, the tapping screw itself is always attracted to the tip of the driving section by the suction force of the air suction type vacuum cleaner. Can be kept. This prevents the self-tapping screw from falling off during the operation, and reduces the burden and labor of the operator.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a disassembled state when a chip suction device of an electric screwdriver according to the present invention is used.

FIG. 2 is an explanatory view showing a state of use of the chip suction device of the electric screwdriver of the present invention in a connected state.

FIG. 3 is an axial sectional view of the chip suction device of the electric screwdriver in use according to the present invention.

FIG. 4 is an axial sectional view of the chip suction device of the electric screwdriver in use according to the present invention.

FIG. 5 is a view showing a form of a tapping screw driven by using the chip suction device of the electric screwdriver of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 chip suction device 2 electric screwdriver 22 drive unit 21 main body of electric screwdriver 3 telescopic cylinder 4 suction cylinder 5 air suction cleaner 51 hose 6 base cylinder 65 communication hole of base cylinder 7 inner cylinder 72 buffer material 74 communication hole of inner cylinder 8 Coil spring 9 Tapping screw

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuo Ikeda 2 Dejima Nishimachi, Sakai City, Osaka Sumitomo Metal Building Materials Co., Ltd. Inside the Housing Roof Business Division (72) Inventor Takashi Imai 2 Dejima Nishimachi Sakai City, Osaka Sumitomo Metal Construction Materials Co., Ltd. Company Housing Roof Division

Claims (6)

[Claims] 1. A telescopic cylinder detachably attached to a main body of an electric driver so as to surround a driving part at a tip of the electric driver, and a suction pipe connected to a side of the telescopic cylinder and communicating with the inside of the telescopic cylinder. The telescopic cylinder comprises a base cylinder fixed to the main body of the electric screwdriver, an inner cylinder inserted inside the base cylinder and held so as to be able to protrude and retract from the base cylinder, and drives the inner cylinder. A coil spring for urging in the direction of the tip of the portion, a communication hole communicating with the suction cylinder is always formed in the base cylinder and the inner cylinder regardless of the state of the inner cylinder being protruded and retracted. A chip suction device for an electric screwdriver, wherein an air suction type vacuum cleaner is connected via an appropriate hose or pipe. 2. The retracting stroke of the inner cylinder is set so that the tip of the inner cylinder reaches the tip of the tapping screw set in the driving part when projecting, and retracts from the tip of the driving part when immersing. The chip suction device for an electric screwdriver according to claim 1. 3. The electric screwdriver according to claim 1, wherein the inner diameter of the inner cylinder is formed to be 1 mm to 3 mm larger than the maximum outer diameter of the tapping screw set in the driving section. Chip suction device. 4. The chip suction device for an electric screwdriver according to claim 1, wherein the telescopic cylinder is formed such that the inner cylinder is exchangeable. 5. A chip suction device for an electric screwdriver according to claim 1, wherein a buffer member made of soft resin or synthetic rubber is attached to a tip of the inner cylinder. 6. The chip suction device for an electric screwdriver according to claim 1, wherein the inner cylinder is made of a transparent synthetic resin.