JP3138093U - Rotary tool cover mounting structure - Google Patents

Abstract

The present invention provides a cover for collecting dust generated by a rotary blade and a cover for ensuring safety, which can be easily applied to rotary tools of different sizes or tools from different manufacturers. Provided is a rotating tool cover mounting structure that can be mounted. A mounting block 5 is attached by a fastening means 4 to a cylindrical bush 3 from which a rotating shaft 2 to which a rotary blade 17 of a tool body 1 is coupled is projected, and a long hole 8 formed in an annular adapter 7 is used. By attaching the annular adapter 7 to the cylindrical bush 3 with the screw 9 and attaching the cover 10 covering the outer periphery of the rotary blade 17 to the annular adapter 7, the annular adapter 7 It can be accommodated by absorbing with the long holes 8.
[Selection] Figure 1

Description

The present invention provides a cover that collects the dust generated by the rotary blades and a cover for ensuring safety that can be easily mounted on different-sized or different-manufactured tools. The present invention relates to a cover mounting structure for a tool.

Conventionally, rotary tools such as hand-held grinders and sanders sprinkle cutting waste during cutting, adversely affecting the human body and damaging the work environment. The forced exhaust is done at. Alternatively, a cover for preventing injury from a rotating blade that rotates at high speed may be attached. In either case, the cover is generally mounted using a cylindrical bush around the rotating shaft, but the thickness of the cylindrical bush varies depending on the size of the rotating tool and the manufacturer. In addition, there is a disadvantage that it is inconvenient and costly to deal with each.
Japanese Utility Model Publication No. 5-88865

The present invention is intended to provide a cover mounting structure for a rotary tool that can be mounted with a common cover regardless of size and manufacturer.

The main feature of the present invention is that a mounting block 5 is attached by a fastening means 4 to a cylindrical bush 3 from which a rotary shaft 2 to which a rotary blade 17 of a tool body 1 is coupled is projected, and a long hole formed in an annular adapter 7. 8, the annular adapter 7 is attached to the cylindrical bush 3 with screws 9, and the cover 10 covering the outer periphery of the rotary blade 17 is attached to the annular adapter 7.

In the present invention, as described above, even if the thickness of the cylindrical bush 3 from which the rotary shaft 2 protrudes slightly changes, it can be absorbed by the elongated hole 8 of the annular adapter 7 to cope with it. There is an advantage that a single type of cover 10 can cope with different sizes and manufacturers.

In addition, since the cover 10 can be attached to and detached from the annular adapter 7, the cover 10 can flexibly cope with a cover that covers the entire rotary blade 17, or a part that is notched and protrudes. Moreover, there is an advantage that it can be applied to either the dust collection cover or the safety cover by simply attaching and detaching it to the annular adapter 7.

FIG. 1 shows an outline of an embodiment of the present invention. A rotary blade 17 of a tool body 1 is driven by a well-known direct connection or transmission by a rotary drive unit such as a motor and protrudes from a cylindrical bush 3. The rotary blade 17 is attached to the drive shaft 2 directly or via the adapter 14.

The cover 10 is attached to the cylindrical bush 3, but in the present invention, an annular adapter 7 is interposed. A plurality of long holes 8 that are sufficiently long toward the center of the circle are formed on the annular mounting surface of the annular adapter 7. On the other hand, a plurality of mounting blocks 5 are attached to the outside of the cylindrical bush 3 by appropriate fastening means 4 such as an elastic band. This mounting block 5 has a mounting hole 6 formed in a horizontal piece projecting outward from the lower end of a vertical hanging piece, and a bolt 9 inserted through the long hole 8 of the annular adapter 7 is screwed into the mounting hole 6. Thus, the annular adapter 7 is attached to the cylindrical bush 3. Here, the bolt 9 may pass through the long hole 8 and the mounting hole 6 and be tightened with a nut.

The cover 10 can be attached to the mounting portion 11 provided at the center portion by any means such as fitting, screwing, screwing, fitting between the claw and the recess, etc. An exhaust duct 12 is continuously extended from the cover 10, and an intake hole 13 is also provided at an appropriate position as necessary. In the illustrated example, the outer periphery of the annular adapter 7 is fitted into the mounting portion 11, and the outer periphery is fastened by a fastening means 24 such as an expansion band.

The rotary blade 17 is a disc-shaped object such as a grinder or a sander, a circular saw, or the like, and the degree of protrusion of the rotary blade 17 from the cover 10 can be adjusted via the adapter 14 as necessary in relation to the cover 10. . In this case, the adapter 14 is provided with a screw hole 15 screwed into the rotary shaft 2 on the upper surface, the mounting screw portion 16 hanging from the lower end passes through the central hole of the rotary blade 17, and the screw hole 19 of the stop plate 18 is screwed. .

(Description of action)
FIG. 2 shows how to use the present invention. (A) is a case where the diameter of the cylindrical bush 3 is thin, the diameter thereof is a, and (b) is a case where the diameter of the cylindrical bush 3 is large. It becomes ba. Then, the mounting position of the mounting block 5 in (b) is mounted on the outer periphery of the thick cylindrical bush 3 at a position moved outward from the case of (a) by the dimension c, along the elongated hole 8 of the annular adapter 7. The mounting position of the bolt 9 is slid outwardly by the dimension c.

Therefore, a change in the radius of the cylindrical bush 3 can be absorbed by the length of the long hole 8. Here, when the diameter of the cylindrical bush 3 is increased, the inner edge of the annular adapter 7 goes around the inner side of the cylindrical bush 3. Even if the thickness of the cylindrical bush 3 changes, the rotating shaft There is no problem because the thickness of is generally not changed.

Thus, the cover 10 covering the outer periphery of the rotary blade 17 collects and removes dust generated by the rotary blade 17 from the duct. In the case of a grinder or the like, the cover 10 has a circular shape as shown in the figure, but in the case of a rotary saw, a part of the cover 10 is cut and a part of the rotary blade 17 is removed from the cover 10 as shown in FIGS. It can be exchanged for something that makes it protrude. When the rotary blade 17 is partly protruded and used in this way, the opposite side of the cover 10 of the rotary blade 17 can be covered with a removable auxiliary cover 25 as necessary.

In the present invention, in the electric rotary tool such as a grinder or a rotary cutter, the diameter of the cylindrical bush 3 is changed by the long hole 8 of the annular adapter 7 even if the manufacturer or size is changed and the diameter of the cylindrical bush 3 is variously changed. It can be absorbed and can be handled by the same type of cover 10 to reduce costs.

Also, even if the dust collection is the same and the safety is the same and safe, the annular adapter 7 is shared and the cover 10 is variously modified, for example, the cover 10 is entirely covered, or a part of the blade edge protrudes. The cover 10 suitable for the application of the rotary blade 17 can be selected by replacing the notch. Furthermore, although the cover 10 is also used for dust collection and safety, the material of the cover 10 is different.

1 is a schematic exploded perspective view of an embodiment of the present invention. In the operation explanatory view of the above, (a) is when the cylindrical bush is thin, and (b) is when the cylindrical bush is thick. The top view of the modification of a cover same as the above. The front view same as the above.

Explanation of symbols

1 is a tool body 2 is a rotary shaft 3 is a cylindrical bush 4 is a fastening means 5 is a mounting block 6 is a mounting hole 7 is an annular adapter 8 is a long hole 9 is a screw 10 A cover 11 is a mounting blade 17 is a rotary blade

Claims (1)

A mounting block 5 is attached by a fastening means 4 to a cylindrical bush 3 from which a rotary shaft 2 to which a rotary blade 17 of a tool body 1 is connected, and an annular adapter 7 is inserted through a long hole 8 formed in the annular adapter 7. Is attached to the cylindrical bush 3 with the screw 9 and the cover 10 is attached to the annular adapter 7 to cover the outer periphery of the rotary blade 17.