JPS6220249Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a plane blade attachment device for an electric plane.

Conventionally, the plane blade of an electric plane has a plane blade presser plate with a lower curved piece at the base end fixed to the plane blade with a set screw so that the blade tip is in a constant protruding state, and the lower curved piece is attached to the plane body. After being fitted into the positioning groove and positioned, the plane blade and plane blade presser plate are attached to the plane body using mounting screws.

However, according to the above-mentioned conventional plane blade attachment means, the plane barrel rotates at high speed, so if the mounting screws for the plane body and the set screws between the plane blade and the plane blade holding plate are not fully tightened, the plane body may The plane blade may fly out during drive rotation, which is very dangerous, and this causes problems such as damage to the plane blade and the machine. Incidentally, as shown in Utility Model Publication No. 36-14197, it was known to provide a tapered counterbore surface directly on the plane blade, but in this case, since it was provided directly on the plane blade with high mechanical strength, the machining was difficult. It was not easy and troublesome.

Therefore, as a result of studies in view of the above-mentioned conventional problems, the present invention is a plane blade mounting device in which a plane blade is attached to a plane body using a plane blade holding plate using a set screw and a mounting screw. This is done by forming a plane blade holding plate with a length and width equivalent to the length and width of the plane blade, and inserting an appropriate number of set screw insertion holes long in the width direction to match the screw holes of the plane blade. The seat part of the set screw is formed in the surface of the plane blade holding plate along the elongated hole as a gentle slope that slopes downward from the tip side to the base side, and By configuring the planer blade and the planer blade retaining plate to be screwed together with the set screw in a state where the surface and the set screw head are butted, the tightening of the set screw and the mounting screw is incomplete. In addition to reliably preventing the plane blade from flying out in the event of a wedge effect, in particular,
Machining is easy because the set screw seat and the inclined surface are provided on the plane blade holding plate, which has lower mechanical strength than the plane blade. Therefore, by tightening the screws, the planer blade can be attached stably and robustly, and it can be manufactured easily and at low cost.

The present invention will be described in detail below based on the illustrated embodiment. In the figure, 1 is a plane blade 1, and the plane blade 1 is made of a band-shaped plate having a constant wall thickness, and one end of the plane blade 1 is formed in the longitudinal direction. A cutting edge 1a is provided at the cutting edge 1a, and a plurality of mounting holes 1b, which are long in the width direction, are formed through the cutting edge 1a at appropriate intervals in the longitudinal direction, approximately in the middle portion thereof in the width direction.

Further, in addition to the mounting holes 1b, two screw holes 1c are formed through the planer blade 1 near both ends in the longitudinal direction.

2 indicates a plane blade holding plate. The plane blade holding plate 2 is made of a band-shaped plate having a constant thickness like the plane blade 1, and is formed to have the same length as the plane blade 1. A downward positioning lower curved piece 2b is curved at the base end of the presser part 2a in the width direction, and the overall dimension in the width direction is formed to be approximately the same as that of the plane blade 2. Further, the holding part 2a has mounting holes 1b, 1b for the plane blade 1.
The screw holes 2c, 2c corresponding to the screw holes 1c are passed through, and long holes 2d for inserting setscrews corresponding to the respective screw holes 1c are formed to be long in the width direction.

3 indicates a plane body, and the plane body 3 has a plane blade mounting surface 3a,
3a are provided symmetrically, and each plane blade mounting surface 3
A, 3a have positioning grooves 3b recessed in the longitudinal direction from the base end thereof in the width direction, into which the lower curved piece 2b can be fitted without play, and each of the mounting holes 1b... , screw holes 3c for mounting screws, which will be described later, are provided at positions corresponding to the respective mounting holes 1b of the plane blade 1 and the screw insertion holes 2c of the plane blade holding plate 2, and the screw holes 3c... In addition to the above screw holes 1c of the plane blade 1 and the long holes 2 of the plane blade holding plate 2.
Recessed portions 3d are provided at positions corresponding to d. Thus, before the plane blade 1 is attached to the plane body 3, it is fixed and integrated with the plane blade holding plate 2 and the setscrew 4 to have a constant protruding length of the blade, and this is fixed to the plane body 3 with the mounting screw 5. The long hole 2d of the plane blade holding plate 2 is for fixing...
The planer blade 1 and the planer blade retainer plate 2 are fixed by inserting them into the screw holes 1c of the plane blade 1, respectively, and fixing them by screwing them into the screw holes 1c of the plane blade 1, respectively. Screw insertion hole 2c... and mounting hole 1 of plane blade 1
It is attached to the plane body 3 by inserting it from b... and screwing it into the screw hole 3c of the plane body 3. Furthermore, on the surface of the plane blade holding plate 2, a seat portion 6 of the head 4a of the set screw 4 is located around the elongated hole.
are provided for each. The seat abutting portion 6 is formed into a gentle slope 7 that slopes downward at a small angle from the tip 2e side of the plane blade holding plate 2 to the base end 2f side, thereby forming the set screw seat abutting portion 6 tip 2
The e side is provided in the thick part 6a, and the proximal end 2f side is provided in the thin part 6b, and the head 4a of the set screw 4 is provided on the inclined surface 7.
The planer blade holding plate 2 itself is configured to act as a wedge when it is seated.

As explained above, according to the electric plane blade mounting device of the present invention, the plane blade 1 is fixed and integrated with the plane blade holding plate 2 by the set screw 4, and the plane blade holding plate 2 is bent downward for positioning. A plane blade mounting device in which a plane blade 1 and a plane blade presser plate 2, which are integrated with a piece 2b and a positioning groove 3b of a plane body 3 are engaged and positioned, are fixed to a plane body 3 with a mounting screw 5. In this, the length and width of the plane blade holding plate 2 are formed to be the same as those of the plane blade 1, and a lower curved piece 2b for positioning is formed along the base end 2f, and a suitable number of lengths are formed in the width direction. The long hole 2d for inserting the set screw in the section is inserted into the screw hole 1c of the plane blade 1...
The seat part 6 of the set screw 4 along the elongated hole 2d is formed corresponding to the long hole 2d... on the surface of the plane blade holding plate 2, and is loosely inclined downward from the tip 2e side to the base end 2f side. The sloped surface 7 is formed on the sloped surface 7, and the sloped surface 7 and the set screw abutting portion 4a are abutted against each other, and the plane blade and the plane blade holding plate 2 are screwed into one body with the set screw 4. As a result, the plane blade holding plate 2 is located between the plane blade 1 and the set screw head 4a and acts as a wedge, so that when the set screw 4 is fully tightened,
When the set screw 4 is incompletely tightened, the plane blade 1 moves in the direction of its base end and does not move in the direction of its cutting edge 1a.
It is possible to prevent the cutting edge 1a from protruding outward from the surface of the plane body 3, which has an excellent effect in terms of safety in cutting work, and prevents interference with the plane blade 1 and the plane blade 1. Accidents due to machine damage etc. can be eliminated. In addition, especially in accordance with the present invention, the length and width of the plane blade presser plate 2 are formed to be the same as those of the plane blade 1, and all the other parts except the cutting edge 1a of the plane blade 1 are formed on the plane blade presser plate 2. to fix the plane blade 1 in a stacked state with respect to the plane body 3, and provide a lower curved piece 2b along the base end 2f of the plane blade holding plate 2,
Since this is engaged with the positioning groove 3b provided long in the length direction of the plane body 3, the plane blade 1 is connected to the plane body 3.
can be mounted safely and robustly without shifting the position.Furthermore, the set screw seat part 6 and the inclined surface 7 can be attached to the plane blade holding plate 2, which has lower mechanical strength than the plane blade 1. Since it is provided, it is easy to process, and since no members other than the plane blade holding plate 2 are required, the structure is extremely simple, and together with this, it can be manufactured at low cost.

[Brief explanation of the drawing]

The accompanying drawing is a cross-sectional view showing an embodiment of a plane blade attachment device for an electric plane according to the present invention. 1... Planer blade, 1c... Screw hole, 2... Planer blade holding plate, 2b... Lower curved piece, 2d... Long hole, 2e... Tip, 2f... Base end, 3... Planer body, 4... Set screw, 4a... Head, 5... Mounting screw, 6... Set screw seat portion, 7... Inclined surface.

Claims (1)

[Scope of utility model registration request] A plane blade 1 is fixed and integrated with a plane blade holding plate 2 using a set screw 4, and a lower bent piece 2 for positioning the plane blade holding plate is attached.
In a plane blade mounting device for an electric plane, the plane blade and plane blade presser plate integrated with each other are fixed to the plane body with mounting screws 5 while the positioning groove 3b of the plane body 3 is engaged with the positioning groove 3b of the plane body 3 and positioned. , the length and width of the plane blade holding plate are formed to be the same as those of the plane blade, and a lower curved piece 2b for positioning is formed along the base end 2f of the plane blade holding plate. Several long holes 2d for inserting set screws are formed corresponding to the screw holes 1c of the plane blade, and the seat portions 6 of the set screws are placed along the long holes on the tip 2e side of the plane blade holding plate. From proximal end 2
A gently sloped surface 7 is formed that slopes downward toward the f side, and the sloped surface and the set screw head 4a are butted together so that the plane blade and the plane blade presser plate are screwed together with the set screw. A plane blade attachment device for an electric plane featuring: