JP4195567B2 - Rotating spear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a field in which the precision of a rotary scissors used for a ladle is to be kept constant and robust even after the tool is polished.
[0002]
[Prior art]
In conventional rotary rods, a plurality of blade grooves are formed at equal intervals on the outer periphery of the rotary cylinder, a blade inner end support step is formed on the blade receiving inner wall, and the back blade is fixedly supported on the inner end surface of the back blade space. Met.
[0003]
Therefore, as the single blade surface of the blade is polished, the blade edge of the blade becomes closer to the tip of the back blade or the outer periphery of the rotating cylinder, and the distance between the blade edge of the blade and the blade edge of the blade is reduced, so that the blade edge of the blade is kept accurate and robust. There was a defect that it was difficult.
[0004]
[Problems to be solved by the invention]
In the present invention, the distance t between the blade edge of the blade and the blade edge of the back blade protruding at equal intervals on the outer periphery of the rotary rod can be kept constant even after the blade is polished, thereby maintaining the accuracy of the blade edge robustly and constantly. The purpose is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention firstly forms a plurality of blade grooves on the outer periphery of the rotating cylinder at equal intervals, and presses the back blade toward the blade groove from the recesses cut between the blade grooves on the outer periphery. An inclined groove that has a female screw hole for support, presses and supports the back blade and the cutter against the outer facing wall of the blade groove by a bolt screwed into the female screw hole, and faces the counter-rotating direction at the bottom of the groove Forming a back blade support inclined surface in the inclined groove, slidably supporting the inner inclined surface of the rectangular bent back blade along the inclined surface, and in the blade support step formed in the blade groove. A rotary rod whose inclination angle of the outer edge single blade surface of the blade supporting the end and the inclination angle of the back blade support inclined surface is the same angle ,
Secondly, the rotary rod according to the first invention, wherein the sliding range of the inner inclined surface of the back blade is until the outer back surface of the back blade contacts the front surface of the blade support stage ,
Consists of.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A rotation driving through hole 1 ′ is formed in the center of the rotating cylinder 1, and a plurality (four) of the cutter grooves 2 are formed on the outer periphery at every opening angle of 90 degrees (equal intervals).
[0007]
The blade groove 2 is inclined in the direction opposite to the direction of rotation of the rotary cylinder 1 (the direction of arrow A, FIG. 1) to form the bottom groove as an inclined groove 2 ′, and the blade groove 2 is bent into a rectangular shape. The blade groove 2 is defined.
[0008]
A back blade supporting inclined surface 2 ″ is formed in the inclined groove 2 ′, and the internal inclined surface 3 ′ of the rectangular bent back blade 3 along the inclined surface 2 ″ is shown in FIG. Support slidable to position.
[0009]
Further, a support step 4 ′ of the cutter 4 is formed in the cutter groove 2, the inner end 4 ″ of the cutter 4 is supported on the step 4 ′, and the single blade surface 5 at the outer end of the cutter 4 protrudes from the outer periphery, The inclination angle α of the single blade surface 5 and the inclination angle β of the back blade support inclined surface 2 ″ and the internal inclined surface 3 ′ of the back blade 3 are made to coincide with each other and are held parallel to each other (FIG. Figure)
[0010]
The sliding range of the inner inclined surface 3 ′ of the back blade 3 is until the outer upright back surface 3 ″ of the back blade 3 comes into contact with the front surface 6 of the blade support stage 4 ′. It is possible to slide from the position shown in FIG. 3A to the position shown in FIG.
[0011]
The outer facing walls 2a and 2b of the blade groove 2 are formed at positions slightly parallel to the diameters X and Y of the rotary cylinder 1 in FIG. A female screw hole 8 for supporting the back blade pressing toward the blade groove 2 from the concave portion 7 cut between the blade grooves 2 and 2 is formed, and the bolt 9 screwed into the female screw hole 8 is used for FIG. (B) As shown in the figure, the back blade 3 and the blade 4 can be pressed and supported on the opposing wall 2b.
[0012]
However, the blade 4 and the back blade 3 are used by being silver-plated. When the cutting edge a of the blade 4 is worn, the blade 4 and the back blade 3 are separated by heating and melting the silver blade, and the front surface 4a of the blade 4 is separated. Is ground in the thickness direction, and the tip (blade edge a) of the single blade surface 5 is sharply polished.
[0013]
Although the thickness w of the blade 4 is gradually reduced by the above polishing, the inner inclined surface 3 ′ of the back blade 3 extends along the back blade support inclined surface 2 ″ from the position of FIG. 3 (b) to FIG. 3 (b). Is shifted (sliding) to the position of 2 and is stopped by hitting the end surface 2c of the back blade support inclined surface 2 ″ and the external upright back surface 3 ″ of the back blade 3 is connected to the front surface 6 of the blade support stage 4 ′ and the blade 4 The front surface 4a is stopped in contact with the front surface 4a, while the front surface 3a of the back blade 3 is pressed and supported by the bolt 9.
[0014]
The protrusion difference t between the blade edge a of the blade 4 and the blade edge b of the back blade 3 is the same as that of the back blade support inclined surface 2 ″, regardless of the decrease in the thickness of the blade 4 due to the above polishing. The blade 4 can be adjusted to a certain level by sliding (sliding) along the blades, and the sharpness of the blade 4 due to the protrusion difference t can be maintained.
[0015]
This is because the inclination angle α of the single blade surface 5 of the blade 4 is parallel to the internal inclined surface 3 ′ and the back blade support inclined surface 2 ″ of the back blade 3 (FIGS. 3A and 3B).
[0016]
In the figure, reference numeral 10 denotes a bolt hole for supporting both sides of the back blade 3, 10 ′ is a bolt head of a bolt screwed into the bolt hole 10, and both side surfaces 11, 11 of the back blade 3 are connected to the bolt head. 10 'and 10' are clamped and fixed from both sides.
[0017]
Accordingly, the top surface of the wood fixed on the grid is rotated at a high speed in the direction of arrow A with the rotary rod sliding on the grid, and the surface of the wood is shaped into the shape of the blade edge a by the cutting edge a of the cutter 4 by the above-described protrusion difference t. Can be cut.
[0018]
【The invention's effect】
Since the present invention is configured as described above, the cutting edge of the blade can be protruded from the rotating blade by a certain distance from the cutting edge of the back blade to keep the difference in protrusion constant, and the front surface of the cutting tool can be cut from the cutting edge of the single blade of the cutting tool. By sharply polishing the cutting edge, the difference in protrusion between the cutting edge and the cutting edge of the back blade can be kept constant by adjusting the internal inclined surface of the back blade along the back blade supporting inclined surface. Can be held sharply and firmly, and the grindability and grinding accuracy of the workpiece can be maintained well.
[Brief description of the drawings]
FIG. 1 is a side view of a rotary rod according to the present invention.
FIG. 2 is a front view of FIG. 1;
FIG. 3A is an arrangement side view of a cutter and a back blade.
(B) The figure is a side view of the cutting state of the cutter.
FIG. 4A is a side view of the cutter.
(B) is a rear view of (b) viewed from the right.
FIG. 5A is a front view of a back blade.
(B) is a side view of (b) viewed from the right.
FIG. 6 is a perspective view of a rotating cylinder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating cylinder 2 Cutter groove | channel 2 'Inclined groove | channel 2 "Back blade support inclined surface 3 Rectangular bending back blade 3' Internal inclined surface 3" External back surface 4 Cutter 4 'Cutter support step 4 "Inner end 5 Outer end single blade surface α, β Inclination angle 6 Front

Claims (2)

A plurality of blade grooves are formed at equal intervals on the outer periphery of the rotating cylinder,
A back blade pressing support female screw hole is formed in the outer periphery from the recess cut between the blade grooves toward the blade groove, and the back blade and the cutter are screwed into the blade groove by a bolt screwed into the female screw hole. An inclined groove that is pressed and supported on the outer facing wall and that faces in the counter-rotating direction is formed at the bottom of the groove,
Forming a back blade support inclined surface in the inclined groove;
The angle of inclination of the outer edge of the blade having the inner end supported by the blade support step formed in the blade groove and supporting the inner inclined surface of the rectangular bent blade along the inclined surface, and the above blade A rotary rod having the same inclination angle as the support inclined surface .   The rotary rod according to claim 1, wherein the sliding range of the inner inclined surface of the back blade is until the outer back surface of the back blade contacts the front surface of the blade support stage.

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