JP2562109Y2 - Dust absorption device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for discarding fine dust generated from a workpiece in dental shaping and other mechanical grinding and polishing operations.

[0002]

2. Description of the Related Art In the dental tooth forming processing or the processing of small articles by manual processing, in order to perform a processing operation using a grinding / polishing machine, it is necessary to treat the dust generated by the processing so as not to be scattered.

[0003] In particular, dust generated when grinding a processing material having a low specific gravity, for example, dry gypsum, or buffing with an abrasive, is fine and acts on the pneumoconiosis by the respiration of the processor. Not only do it splatter,
They are stagnant in the room and cause damage to their roommates. When this scattered substance is a harmful substance, there is a risk of occupational illness if a large amount is inhaled in the long term, and prevention of scattering of dust is an important issue.

[0004] As a method of preventing this, a portion where dust is generated is covered with a cover to prevent scattering of dust, or a cover is provided partially and a suction hose is connected inside the cover.
There is a method in which dust in the cover is sucked in by a suction hose and discarded.

[0005]

In a conventional dust-absorbing device, a rotary tool such as a brush or a buff is usually installed on a desk, and the rotary tool is operated by hand while visually observing a workpiece from the near side. I do. In this case, in order to provide a dust scattering prevention cover on the outer periphery of the rotary tool, it is necessary to configure the cover in a state where a space for free working is secured on the front side of the rotary tool. The suction hose is provided at one location in the cover, usually at the front of the operator.

However, when machining with a rotating tool such as a brush or buff, dust generated at that time is diffused by centrifugal force in the rotating direction of the tool and scatters in the entire circumferential direction. With such a suction hose, only a part of the dust in the entire circumferential direction is sucked, and the scattering of the dust is incomplete.Especially, when it goes forward, the scattered dust adheres to the cover and contaminates the inner surface of the cover. As a result, there is a problem that it is difficult to visually confirm the processing state.

The present invention has been made in view of the above circumstances, and provides a dust suction device that can cleanly and surely suction a dust generated by grinding and polishing without scattering, and can easily perform a processing operation. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a dust suction device according to the present invention is provided so that the periphery of a rotary tool 2 connected to a driving motor 1 can be used as a machining zone 3 on both front and left and right sides. A cavity 6 surrounding at least the release portion 4 side of the processing zone 3 is provided in an upper portion of a main body cover 5 having a large part of the surface as a release portion 4 in communication with a connection port 7 of a blower. A slit-shaped outlet 8 along
The air outlet 8 is provided below the rear surface of the main body cover 5.
A suction port 10 communicating with a connection port 9 of a suction device for forcibly sucking the positive pressure air sent from the apparatus is provided.

Further, a universal cover 11 which opens and closes the main body cover 5 by surrounding at least a front side surface of the release portion 4 is pivotally provided, and the universal cover 11 is provided with a positive pressure air supplied from the outlet 8. The processing zone 3 is inclined so as to guide air toward the suction port 10 and at least partially.
May be provided with a transparent portion that can see through.

[0010]

In the above configuration, the processing of the workpiece can be performed in the processing zone 3 in the main body cover 5 secured around the rotary tool 2. The rotary tool 2 is connected to a rotary shaft 1a of a drive motor 1 installed on a desk such as a work table, and the rotary tool 2 is brought in by inserting the rotary tool 2 from either the left or right side of the release unit 4 to bring the rotary tool 2 into position. 2 is positioned in the processing zone 3.

When a blower is connected to the connection port 7 and a suction device is connected to the connection port 9, the positive pressure air from the blower passes through the slit-shaped cavity 6 from the blow-out port 8 to form a thin film. Then, the processing zone 3 is surrounded in a rectified state, and the air supplied from the outlet 8 is forcibly sucked by the negative pressure action of the suction device and is sucked into the suction port 10.

At this time, an air curtain is formed by the rectified positive pressure air which is ejected in a thin film form from the outlet 8 and
This not only prevents the dust generated by the use of the rotary tool 2 from being scattered, but also causes the scattered dust to be contained in the negative pressure air to the suction port 10 and carried to the suction port 10 for discharge.

Further, a free cover 11 that opens and closes at least around the front side surface of the release portion 4 with respect to the main body cover 5 is pivotally provided. By inclining the universal cover 11 so as to guide the positive-pressure air sent from the outlet 8 backward and send it toward the suction port 10, a relatively specific gravity that cannot be prevented by the air curtain described above. Dust such as large metals can be shielded by the flexible cover 11.

Further, the forward airflow blown from the outlet 8 is forcibly forced by the suction port 1 due to the inclination of the universal cover 11.
By guiding in the zero direction, the suction efficiency to the suction port 10 can be improved, and the adhesion of dust to the universal cover 11 can be efficiently prevented.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a dust suction device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view in the width direction of the dust suction device shown in FIG. FIG. 3 is a perspective view of a dust suction device according to another embodiment of the present invention. FIG. 4A is a cross-sectional view in the width direction of the dust suction device of FIG. 3, and corresponds to a cross section taken along line BB of FIG. 4B. FIG.
FIG. 4B is a vertical sectional view of the dust suction device of FIG.
(a) corresponds to a cross section along the line AA.

1 and 2, a drive motor 1 is set on a desk, and a rotary tool 2 such as a rotary grindstone is mounted on a rotary shaft 1a. As the rotary tool 2, a brush, a buff, or the like may be attached to a rotary shaft (not shown in the drawing) on the opposite side of the drive motor 1, and can be freely replaced depending on a processing mode. The rotation direction of the drive motor 1 is counterclockwise, and the workpiece 14 for tooth formation and the like is held and held by hand, and the workpiece 14 is applied to the rotary tool 2 to perform a desired machining operation.

A main body cover 5 is provided above the rectangular base 15, and the main body cover 5 is provided with a rear surface 5a of the base 15,
Protruding portions 5b, 5b slightly protruding from both sides from the rear surface and an upper top plate 5c are provided, and the protruding portions 5b, 5b are each formed with an inverted U-shaped concave edge 5d in the middle. In this apparatus, the space between the base 15 and the top plate 5c constitutes the processing zone 3. The concave edges 5d and 5d of the overhang portions 5b and 5b are
Has an effective shape when it is positioned in the processing zone 3.

As shown in FIG. 2, the top plate 5c is provided with a cavity 6 having a rectangular cross section continuously along both sides and a front portion thereof. Is in communication with The cavity 6 is provided with a slit-shaped outlet 8 extending downward along the inner corner of the entire periphery of the cavity 6, and the air blown from a blower (not shown) connected to the connection port 7 is provided. The pressurized air is rectified in the form of a thin film from the outlet 8 in a downward direction around the entire periphery of the cavity 6 and jetted out, and rectified air is applied to the machining zone 3 so as to cover the entire periphery except the rear surface 5 a of the main body case 5. Form a curtain.

Further, a suction port 10 is provided below the rear surface 5a of the main body cover 5, and a suction device (not shown in FIG. 1, but may be the same as the suction device 17 shown in FIG. 3) is provided. Connection port 9 is provided in a communicating state.

In order to perform a desired processing on the workpiece 14 by such a dust-absorbing device, the rotary tool of the drive motor 1 having the processing zone 3 in the main body cover 5 installed on a desk such as a work table is brought. 2, a blower is connected to the connection port 7, a suction device is connected to the connection port 9, the blower and the suction device are operated, the rotary tool 2 is driven to rotate, and the workpiece 14 is held by hand. The desired machining operation is performed by touching the rotary tool 2.

At this time, dust generated by grinding or polishing of the workpiece 14 is scattered all around by the rotation of the rotary tool 2, but is blocked by the rear surface 5 a of the main body cover 5 at the rear and is blocked by the suction port 10. The dust that is sucked and scatters in the other direction is blocked by the positive pressure air curtain formed by the outlet 8 and is sucked by the negative pressure air to the suction port 10 and discharged to the suction device.

3 and FIGS. 4 (a) and 4 (b) show another embodiment of the present invention, which has substantially the same structure as the above-described structure of the dust-absorbing device. The shape, the shape and the installation position of the cavity 6 are changed according to the shape of the main body cover 5, and the universal cover 11 is provided on the front surface of the main body cover 5.
It is in the point that was pivoted.

The shape of the main body cover 5 is such that the upper surface of the rear surface 5a is continuously curved with the top plate 5c, and the rear surface 5a, the overhang portions 5b, 5b, the top plate 5c, and the concave edges of the overhang portions 5b, 5b. 5
The provision of d and 5d is the same as the above configuration.

The cavities 6 are provided with side cavities 6b on both sides in addition to the front cavities 6a, and each cavity 6 is not rectangular in cross section as described above, but is shaped like a gap along the shape of the main body cover 5. The slit-shaped outlet 8 is provided along the tip of the cavity 6, and the outlet 8 of the front cavity 6 a is directed obliquely downward along the inclined shape of the universal cover 11. is there.

The transparent cover 11 may be formed with a transparent part on a part thereof so that an operator can see through the processing zone 3, or the whole surface may be a transparent part. In addition, the universal cover 11
The lower end is pivotally mounted on the front edge of the base 15 by a hinge 11a so as to surround at least the front side surface of the release part 4 with respect to the main body cover 5 so that it can be freely opened and closed. And can be freely opened and closed manually. The shape of the universal cover 11 is
The positive pressure air sent from each of the outlets 8 has a predetermined inclined shape so as to be guided backward and sent toward the suction port 10.

According to this dust suction device, in the above-described embodiment device, relatively large specific gravity metal or the like dust which could not be prevented by the thin film air curtain by the positive pressure air from each outlet 8 is moved forward. When scattered, it is shielded by the universal cover 11, and the inclined positive shape of the universal cover 11 forcibly guides the forward positive pressure air flow sent from the outlet 8 toward the suction port 10, This improves the efficiency of suction into the suction port 10 and prevents dust from adhering to the universal cover 11.

[0028]

[Effect of the Invention] As described above, according to the dust suction device of the present invention, the dust suction device is constituted separately from the drive motor installed on the desk such as a work table, and is connected to the drive motor when used. In addition, the present invention is applied to various rotary tools, and a worker can freely perform a working operation by a release portion near the front of the main body cover.

The rectifying effect of the apparatus and the formation of an air curtain prevent scattering of dust generated by the use of the rotating tool, and efficiently discharge the scattered dust to the suction port, so that the worker or the person in the room can use the tool. Prevents pneumoconiosis and allows work to proceed in a clean state.

Further, when the flexible cover is provided, even if the dust is a fine particle having a large specific gravity such as a metal, the influence of the dust on the worker is reliably prevented by the shielding effect of the flexible cover. The inclination effect of the universal cover can prevent dust from adhering to the universal cover and keep the universal cover clean.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dust suction device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view in the width direction of the dust suction device shown in FIG.

FIG. 3 is a perspective view of a dust suction device according to another embodiment of the present invention.

FIG. 4 (a) is a cross-sectional view in the width direction of the dust suction device of FIG. 3, and corresponds to a cross section taken along line BB of FIG. 4 (b). FIG.
FIG. 4B is a vertical sectional view of the dust suction device of FIG.
(a) corresponds to a cross section along the line AA.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Drive motor, 2 ... Rotary tool, 3 ... Processing zone, 4 ...
Opening portion, 5: body cover, 6: cavity, 7: connection port of blower, 8: outlet, 9: connection port of suction device, 10: suction port, 11: universal cover.

Claims (2)

(57) [Scope of request for utility model registration] An upper portion of a main body cover having a front surface and a large portion of left and right side surfaces as open portions so that a periphery of a rotary tool connected to a drive motor can be used as a machining zone.
A cavity 6 surrounding at least the release portion 4 side of the processing zone 3 is provided in communication with a connection port 7 of the blower,
A slit-shaped outlet 8 is provided along the cavity 6, and suction is provided below the rear surface of the main body cover 5 to a connection port 9 of a suction device for forcibly sucking positive pressure air sent from the outlet 8. A dust suction device provided with a mouth 10. 2. A universal cover 11 which pivotally surrounds at least a front side surface of the release portion 4 with respect to the main body cover 5 and is opened and closed. The dust suction device according to claim 1, wherein the dust suction device is inclined so as to guide air toward the suction port 10, and has a transparent portion at least partially through which the processing zone 3 can be seen.