JPH10315134A - Disc grinder with dust collecting cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc grinder with a dust collecting cover which has good workability in grinding a curved surface and can efficiently collect dust without using a dust collector having an external drive source. SOLUTION: A disc grinder with a dust collecting cover has a grinder body 1 removably provided with a grinding disc 11 on the tip and a dust collecting cover 2 mounted on the grinder body 1 such that it surrounds the grinding disc 11 and collecting dust produced by the contact of the grinding disc 11 and the surface to be ground. The dust collecting cover 2 is mounted on the grinder body 1 via a spring 3 which joins the grinder body 1 to the dust collecting cover 2 such that, when a force vertical to the surface to be ground is applied to the tip of the dust collecting cover 2, the dust collecting cover 2 can be moved in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disc grinder with a dust collecting cover. More specifically, the present invention relates to a disk grinder with a dust collection cover which is excellent in workability in polishing a curved surface and can efficiently collect dust without particularly using a dust collector having an external drive source.

[0002]

2. Description of the Related Art As a conventional disk grinder with a dust collecting cover, various types have been proposed (for example,
Dust collection device for disk grinder
No. 3), a disk grinder with a dust collecting device (Japanese Utility Model Application Laid-Open No. 61-92556), a disk sander with a dust collecting cover (Japanese Utility Model Application Laid-Open No. 2-143157)).

[0003]

However, the dust collecting device of the above-mentioned disk grinder (Japanese Utility Model Laid-Open No. 3-87563).
Japanese Patent Application Laid-Open No. H11-139,1992 discloses a method in which a work site for polishing or grinding (hereinafter referred to as "polishing") is completely sealed and then vacuumed, so that the surface in contact with the dust collecting cover and the surface to be polished are completely closed. It is difficult to obtain an efficient dust-collecting effect with a grinder that tilts the polishing machine, and the dust-collecting cover completely covers the abrasive, making it possible to visually observe the polishing work site. And the workability was poor. Furthermore, since it is necessary to suck up the entire atmosphere, it is necessary to collect the dust using a powerful dust collector, and there is a problem that there is a limit in a centralized dust collecting apparatus such as a large factory. On the other hand, in the disk grinder with the dust collecting device (Japanese Utility Model Application Laid-Open No. 61-92556) and the disk sander with the dust collecting cover (Japanese Utility Model Application Laid-Open No. 2-143157), the direction of the vector in which the abrasive powder is generated is changed. The dust collecting effect is higher than that of the above-mentioned dust collecting device because the suction port is provided, and the workability is good in that the polishing work site can be visually checked, but the polishing dust is removed from the polishing work site along the surface to be polished. In practice, it is necessary to keep the dust collection port always in contact with the surface to be polished because of the discharge.Therefore, there are many restrictions on the position of the polisher during work, and it can be used even when abrasives such as grinding stones wear out. There was a problem that it disappeared. In addition, the shape of the dust collecting port also has a problem that the dust collector is required to have a certain level of dust collecting capability in order to collect the dust after blocking the abrasive dust. The present invention has been made in view of the above problems, and provides a disk grinder with a dust collection cover that is excellent in workability in polishing a curved surface and that can efficiently collect dust without using a dust collector having an external drive source. The purpose is to do.

[0004]

According to the present invention, there is provided the following disk grinder with a dust collecting cover. [1] A grinder main body having a polishing disk that is rotatably driven at its tip is detachably attached, and the grinder main body, a dust collecting cover that collects dust generated by contact between the polishing disk and the surface to be polished are provided. In a disk grinder with a dust collection cover, the dust collection cover was attached to the grinder body via a spring body, and the spring body applied a force in the direction perpendicular to the surface to be polished to the tip of the dust collection cover. A disc grinder with a dust collecting cover, wherein the grinder body and the dust collecting cover are connected so that the dust collecting cover is movable in that direction. [2] The dust collecting cover has an arc shape having a notch partly notched so as to expose a part of the polishing disk, and has a discharge port in a direction opposite to the notch part [1]. ] A disc grinder with a dust collection cover as described in [1]. [3] The disk with a dust collection cover according to [1] or [2], wherein the dust collection cover has a lower surface wall in surface contact with the surface to be polished, an upper surface wall opposed to the lower surface wall, and an outer peripheral side wall connecting both surfaces. grinder.

[0005]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view schematically showing one embodiment of a disc grinder with a dust collection cover of the present invention. FIG. 2 is a perspective view schematically showing one embodiment of a disc grinder with a dust collection cover of the present invention when viewed from a direction different from FIG.

A disk grinder with a dust collecting cover according to the present invention has a grinder main body 1 having a rotatingly driven polishing disk 11 removably attached to the tip thereof, and a grinding disk 11 attached to the grinder main body 1 so as to surround the grinding disk 11. And a dust collecting cover 2 for collecting dust generated by the contact between the polishing disk 11 and the surface to be polished. The dust collecting cover 2 is attached to the grinder body 1 via a spring body 3. Installed. This spring body 3
The grinder main body 1 and the dust collecting cover 2 are connected so that the dust collecting cover 2 is movable in the direction perpendicular to the surface to be polished when a force is applied to the tip of the dust collecting cover 2. I have. The force in the direction perpendicular to the surface to be polished is not limited to the strict sense of the vertical direction, but also includes a case where a predetermined angle is formed from the vertical direction.

The spring body 3 has a coil spring shape,
A leaf spring can be used. FIG. 1 shows an embodiment using a leaf-shaped spring body. The spring body 3 has, for example, one end sandwiched between a first support member 31 and a second support member 32 and is fixed to the dust collection cover 2, and the other end includes a third support member 33 and a fourth support member 33. And is fixed to the grinder body 1. With such a configuration, when a force in a direction perpendicular to the surface to be polished is applied to the tip 21 of the dust collection cover 2, the tip 21 is moved in that direction.
It becomes movable with the third support member 33 as a fulcrum. By making the tip 21 movable as described above, the polishing disc 1
1 is tilted (with an angle) to make contact with the surface to be polished, and when performing a polishing operation, the tip 21 of the dust collecting cover comes into contact with the surface to be polished first, and the polishing disk 11 comes into contact with the surface to be polished. Can be prevented from being hindered, and efficient polishing can be performed. This makes it possible to follow even when the polishing disk 11 is worn, and it is possible to suitably maintain the contact with the polished surface of the dust collecting cover 2. It is to be noted that, when actually performing the polishing operation, the polishing disk 11 is tilted and used because if the entire surface of the polishing disk 11 is brought into contact with the surface to be polished, the polishing disk 11 is not stable on the surface to be polished, This is because the work moves irregularly, which is not preferable.

The shape of the dust collecting cover 2 is preferably an arc shape, and it is further preferable that the dust collecting cover 2 has a C-shape having a cutout portion 25 in which a part thereof is cut out so as to expose the polishing disk 11. preferable. With such a configuration, it is possible to observe a polishing work site during the polishing work.

The dust collecting cover 2 has the notch 2
It is preferable to provide the outlet 26 in the direction opposite to the direction 5. That is, as shown in FIG. 3A, the dust generated at the polishing work site is carried in the direction indicated by the dotted line along the airflow (the direction of the kinetic energy) due to the rotation of the polishing disk. Preferably, it is provided at the position shown in FIG. By doing so, the dust is automatically carried to the discharge port 26, so there is no need to use a dust collector having an external drive source, etc., so that the dust can be collected efficiently, and sanitary, environmental, and energy saving measures can be taken. Etc. can be contributed.

Further, the shape of the dust collecting cover 2 is changed to a lower surface wall 22 in surface contact with the surface to be polished and an upper surface wall 2 opposed to the lower surface wall.
3 and the outer peripheral side wall 24 connecting the both, the front end portion 21 is made movable, and the lower surface wall 22 is covered regardless of the inclination angle of the polishing disk 11. Even if the polished surface is flat, even if it is a curved surface, good surface contact with the surface to be polished is always possible, so that the dust does not escape from the lower surface side of the dust collecting cover 2 and the polishing work is performed. It enables efficient dust collection with improved properties. In addition, as can be seen from the scattering state of the dust indicated by hatching in FIG. 3B, the dust is scattered at a predetermined distance from the surface to be polished, and the lower surface wall 22 is effectively in contact with the surface to be polished. Because it makes contact, the outer peripheral side wall 2
The weight of the dust collecting cover 2 can be reduced by making the diameter 4 sufficient to cover the scattering distance and as low as possible. This is particularly effective for a hand-held grinder.

As described above, in the disk grinder with a dust collecting cover of the present invention, the grinder main body and the dust collecting cover are connected via a spring body so that their relative positions are variable, and the surface of the surface to be polished is formed. The work efficiency of the grinder is improved by being able to appropriately cope with the shape. In addition, by using the air current (kinetic energy for dust) generated by the rotation of the disk during polishing as the driving force for dust collection, dust can be efficiently collected without using a dust collector. Further, the shape of the wall of the dust collecting cover is made into a shape (ie, a C-shape and a wrap angle of about 270 degrees) so that the dust can always be collected in consideration of the scattering direction of the dust. The shape is such that the dust itself can reach the discharge port by continuous collision or rebound against the wall. Also,
A cutout portion is provided in a part of the dust collection cover within a range that does not affect the dust collection efficiency, so that the work site can be observed during the polishing operation.

[0012]

EXAMPLES The present invention will be described more specifically with reference to the following examples. [Example 1] As a dust collecting cover, a metal plate material such as an iron-based or aluminum-based material was bent by sheet metal so as to have a shape (disc wrap angle of 180 to 270 degrees) shown in Figs. Produced. FG-4CX manufactured by Fuji Air Machine Co., Ltd. was used as the grinder body. Also, as a spring body,
Leaf spring material such as spring steel or phosphor bronze (thickness 1.5mm,
(Width 20 mm, length 30 mm). The support member was manufactured in the same manner using the same material as the spring body except for the one attached to the grinder body. The support member attached to the grinder body was made of aluminum and was formed into a ring shape by cutting, and was fastened to the grinder body with bolts and nuts. The joining between these supporting members and the leaf springs was performed by a method of fixing with bolts via a contact plate. As a polishing disk, a CNS bevel or Metacon disk manufactured by Sumitomo 3M Limited was used. When the curved surface of the automobile bonnet painted as the surface to be polished was polished using this grinder, the dust collection cover followed the curved surface to be polished well, collected the dust without missing it, and the dust Was efficiently collected by the dust collection hose connected to

[0013]

As described above, according to the present invention, there is provided a disk grinder with a dust collecting cover which is excellent in workability in polishing a curved surface and can efficiently collect dust without particularly using a dust collector having an external drive source. And can contribute to sanitation, the environment, energy conservation measures, etc.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing one embodiment of a disc grinder with a dust collection cover of the present invention.

FIG. 2 is a perspective view schematically showing one embodiment of a disc grinder with a dust collection cover of the present invention when viewed from a direction different from FIG.

FIGS. 3A and 3B are diagrams schematically showing a state of scattering of dust in a dust collecting cover used in the present invention, wherein FIG.
(B) is a front view, and (c) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grinder main body 2 Dust collection cover 3 Spring body 11 Polishing disc 21 Dust collection cover tip 22 Dust collection cover lower wall 23 Dust collection cover upper wall 24 Dust collection cover outer peripheral side wall 25 Dust collection cover notch 26 Dust collection cover outlet 31 first support member 32 second support member 33 third support member 34 fourth support member

Claims (3)

[Claims] 1. A grinder main body having a rotatingly mounted polishing disk detachably attached to a tip thereof, and a grinding disk mounted on the grinder body so as to surround the polishing disk, by contact between the polishing disk and a surface to be polished. In a disc grinder with a dust collecting cover having a dust collecting cover for collecting generated dust, the dust collecting cover is attached to the grinder body via a spring body, and the spring body is connected to a tip portion of the dust collecting cover. A disc grinder with a dust collecting cover, wherein the grinder body and the dust collecting cover are connected so that the dust collecting cover is movable in the direction perpendicular to the surface to be polished in the direction. . 2. The dust collecting cover has an arc shape having a notch partly notched so as to expose a part of the polishing disk, and has a discharge port in a direction opposite to the notch part. The disk grinder with a dust collection cover according to claim 1. 3. The disk with a dust collecting cover according to claim 1, wherein the dust collecting cover has a lower surface wall in surface contact with the surface to be polished, an upper surface wall facing the lower surface wall, and an outer peripheral side wall connecting both surfaces. grinder.