JP3125166U - Rotating tool for processing plasterboard - Google Patents

Abstract

A rotary tool for processing a gypsum board is a rotary tool in which a rotary shaft extends perpendicularly to an upper surface of a gypsum board, and includes at least one side blade and at least one chip discharge groove. And a shank portion 17 extending from the cone portion 16. And both taper angles (theta) of the cone part were set to 90.5 degrees-91.5 degrees.
[Effect] Protrusions are generated on the wall of the V-shaped cross-sectional groove due to rough cutting surfaces. This protrusion is housed in a gap of about 1 ° generated at the mating portion. Even if the cutting surface is rough, the gypsum board can be bent accurately at 90 °, and the finishing accuracy is improved.
[Selection] Figure 1

Description

  The present invention relates to a rotary tool for processing a gypsum board.

  The gypsum board is also called a plaster board, and is a plate-like molded article in which both sides of gypsum are covered with base paper for board. Since gypsum exhibits fireproof performance, sound insulation performance, and heat insulation performance, gypsum board is preferably used as a base material for building interior materials.

Since the gypsum board is commercially available with a fixed size of 0.91 m × 1.82 m, the gypsum board is appropriately cut and attached to the fuselage wall or ceiling.
This cutting can be performed with a cutter knife, but when the cutting portion is long, a rotary saw is used (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-32004 (FIG. 1)

On the other hand, the part that becomes a problem in the foundation construction is a protruding corner portion that projects locally into the room. A conventional base construction method for the protruding corner will be described with reference to the drawings.
FIG. 7 is an explanatory view of a conventional base construction method. As shown in FIG. 7A, when the H-shaped steel 102 is exposed on the fuselage wall 101, a thin lightweight channel is formed on the H-shaped steel 102. 103 ... (... indicates a plurality. The same applies hereinafter).

  Further, gypsum board strips 104, 105, and 106 are cut out from a commercially available gypsum board using the rotary saw disclosed in Patent Document 1. Then, these strips 104, 105, 106 are applied to the lightweight channels 103... As indicated by arrows.

Next, as shown in (b), the strips 104, 105, 106 are fixed to the lightweight channels 103... With screws 107.
The end surface 108 of the band plate 105 at the portion where the band plate 105 overlaps the band plate 104 is aligned with the outer surface of the band plate 104 by sanding. Similarly, the end surface 109 of the band plate 106 where the band plate 106 overlaps the band plate 105 is aligned with the outer surface of the band plate 105 by sanding.

The conventional base construction method described above has the following drawbacks.
When the end face 108 or the end face 109 is filed in the state of FIG. 7B, the gypsum powder rises and the working environment deteriorates. From the viewpoint of the work environment, it is desirable to abolish file hooking at the ground construction site.

  This invention makes it a subject to provide the rotary tool for gypsum board processing which can abolish file hooking in a base construction site.

  The invention according to claim 1 is a rotary tool for processing a gypsum board in which a rotary shaft extends perpendicularly to the upper surface of the gypsum board and has a V-shaped cross-sectional groove in the gypsum board, and the rotary tool includes a side blade. It consists of a cone part and a shank part extended from this cone part, The both taper angles of the said cone part are set to 90.5 degrees-91.5 degrees, It is characterized by the above-mentioned.

  The invention according to claim 2 is characterized in that the cone portion is provided with a chamfering blade for chamfering an upper corner portion where the upper surface of the gypsum boat and the wall of the V-section groove intersect.

  In the device according to claim 1, a V-shaped cross-sectional groove is made in the gypsum board with the rotary tool for gypsum board processing. H-shaped steel or the like can be enclosed by bending the gypsum board along this groove. At the ground construction site, the plaster board can be folded and the end face of the strip is not exposed. Therefore, no file is required.

When a V-shaped groove is drilled with a rotary tool in which both taper angles of the cone are set to 90.5 ° to 91.5 °, the V-shaped groove has an opening angle of 90.5 ° to 91.5 °. Finished with.
On the other hand, protrusions due to rough cutting surfaces are generated on the walls of the V-shaped cross-sectional grooves. This protrusion is stored in a gap of about 1 ° generated at the mating portion. As a result, even if the cutting surface is rough, the gypsum board can be accurately bent at 90 °, and the finishing accuracy is improved.

  In the device according to claim 2, the upper corner portion of the V-shaped cross-sectional groove is chamfered. In gypsum board, the upper and lower surfaces of the gypsum layer are covered with base paper. When processing the V-shaped cross-sectional groove, the cut surface of the base paper on the upper surface side becomes fuzzy and burrs are generated. However, by chamfering the upper corner portion, the adverse effects of burrs can be eliminated.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a side view of a gypsum board processing rotary tool according to the present invention. A gypsum board processing rotary tool 10 is a rotary tool in which a rotary shaft 11 extends perpendicularly to an upper surface 13 of a gypsum board 12, It comprises a conical portion 16 having one or more side blades 14 and one or more chip discharge grooves 15, and a shank portion 17 extending from the conical portion 16.

In general, a tool having four or more blades is called a cutter, and a tool having three or less blades is called a router or router pit. The rotary tool 10 of the present invention is a general term for rotary cutters including a cutter, a router, or a router pit. However, the rotary saw does not include the rotary saw because the rotary shaft extends parallel to the upper surface of the gypsum board.
Further, the material of the rotary tool 10 is preferably cemented carbide, but any material can be used as long as it is a material generally used for tools such as tool steel.

  The gypsum board 12 is formed by pasting a base paper 19 on the lower surface of a plate-like gypsum layer 18 and a base paper 21 on the upper surface. The cone portion 15 has a height that allows the gypsum layer 18 to be cut leaving the base paper 19 on the lower side of the drawing. And both taper angles (theta) of the cone part were set to 90.5 degrees-91.5 degrees. The reason for this setting will be described later.

  FIG. 2 is an enlarged view of two parts of FIG. 1. Preferably, a chamfering blade 23 for chamfering an upper corner portion where the upper surface 13 of the gypsum boat and the wall 22 of the V-shaped crossing groove are chamfered (see FIG. Prepare for 1). When the angle formed by the chamfering blade 23 with the extension line of the side blade 14 is α and the angle formed by the chamfering blade 23 with the upper surface 13 is β, α + β is approximately 44 °. Α is set to 20 ° to 24 °, which is about half of (α + β).

Next, the operation of the gypsum board processing rotary tool described above will be described.
FIG. 3 is an operation explanatory view of the rotating tool for processing a gypsum board of the present invention. In FIG. 3A, the rotating tool 10 is attached to the electric motor 25 and rotated at a speed of several thousand revolutions per minute. And it is made to face to the gypsum board 12 like a white arrow. Then, as shown in (b), the V-shaped cross-sectional groove 26 can be bored. Chamfered portions 27 are formed at the upper corner portion of the V-shaped cross-sectional groove 26.

  If dust is processed with a dust collector, it is possible to perform grooving in an empty space at the base construction site. However, it is desirable to perform grooving in an empty room near the base construction site.

FIG. 4 is a diagram showing an example of the base construction method. As shown in FIG. 4A, when the H-shaped steel 29 is exposed on the body wall 28, a thin lightweight channel is formed on the H-shaped steel 29. Install 31 ... And the gypsum board 12 provided with the V-shaped cross-sectional groove | channels 26 and 26 is made to face.
And as shown in (b), the gypsum board 12 is wound around the H-section steel 29 and fixed with screws 32.

The gypsum board 12 may be bent and the end face is not exposed. Therefore, no file is required.
Next, the reason why both taper angles θ of the cones are set to 90.5 ° to 91.5 ° will be described.

  FIG. 5 is a view for examining a V-shaped cross-sectional groove. As shown in FIG. 5A, a gypsum board 12 in which a V-shaped cross-sectional groove 26 having a spread angle θ1 is processed is prepared. On the wall 22 of the V-shaped cross-sectional groove 26, the protrusion 33 due to the roughened cutting surface remains. If both taper angles of the cone are 90 °, the groove θ1 is also 90 °, and if both taper angles of the cone are 91 °, the groove θ1 is also 91 °.

(B) shows a comparative example in which the θ1 of the groove was 90 °, and since the protrusion 33 obstructed, the angle δ1 after bending was 91 °.
(C) shows an example in which the θ1 of the groove was 91 °. Since there was a margin of 1 °, the angle δ2 could be easily and reliably maintained at 90 ° even with the protrusion 33.

Next, the effect of chamfering will be described.
FIGS. 6A and 6B are diagrams for explaining the effect of chamfering, in which FIGS. 6A and 6B show examples without chamfering, and FIGS. 6C and 6D show examples in which chamfering is performed.

As shown to (a), the cut surface of the base paper 21 becomes fluffy, and the burr | flash 34 generate | occur | produces. Then, as shown in (b), the burr 34 is sandwiched between the base paper 21 and the base paper 21, and the angle δ1 after bending may not be 90 °.
As a countermeasure, a chamfered portion 27 is applied to the upper corner portion as shown in FIG. Then, as shown in (d), the burr 34 was settled, and the angle δ1 after bending could be set to 90 °.

  The rotating tool for processing a gypsum board according to the present invention is suitable for processing a gypsum board having a V-shaped cross-sectional groove.

It is a side view of the rotary tool for gypsum board processing concerning the present invention. FIG. 2 is an enlarged view of part 2 of FIG. 1. It is operation | movement explanatory drawing of the rotary tool for gypsum board processing of this invention. It is a figure which shows an example of a base construction method. It is an examination figure about a V-shaped section groove. It is a figure explaining the effect of chamfering. It is explanatory drawing of the conventional base construction method.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Rotary tool for gypsum board processing, 11 ... Rotary axis, 12 ... Gypsum board, 13 ... Top surface of gypsum board, 14 ... Side blade, 16 ... Conical part, 17 ... Shank part, 23 ... Chamfering blade, 26 ... V-shape Cross-sectional groove, θ ... both taper angles of the cone.

Claims (2)

  A rotary tool for processing a gypsum board in which a rotary shaft extends perpendicularly to the upper surface of the gypsum board and has a V-shaped groove in the gypsum board. A rotating tool for processing a gypsum board, comprising an extended shank portion, wherein both taper angles of the cone portion are set to 90.5 ° to 91.5 °. 2. The rotary tool for processing a gypsum board according to claim 1, wherein a chamfering blade for chamfering an upper corner portion where an upper surface of the gypsum boat and a wall of a V-section groove intersect is provided in the cone portion.

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