JPH0410979Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] The present invention uses an angle material wound into a coil shape.
This invention relates to a cutter that can cut easily and reliably.

[Conventional technology]

For example, flanged rings used to connect cylindrical bodies in series are usually manufactured by cutting an angle material wound into a coil of a predetermined diameter each round and welding the cut surfaces together. Ru.

This angle material has conventionally been cut using a high-speed saw or gas cutting.

[Problem that the invention attempts to solve]

However, using a high-speed saw to cut angle materials takes time and has poor dimensional accuracy; gas cutting also has poor dimensional accuracy;
Moreover, since the cut is irregular, it takes time to finish and requires skill.

Straight strips and angle materials can be cut quickly and accurately with a cutter consisting of a fixed blade and an elevating blade, but when cutting angle materials wound around coil material, it is necessary to Since parts other than the cutting part come into contact with the angle material, it is not possible to cut it effortlessly, smoothly, and efficiently.

Therefore, an object of the present invention is to provide a cutter that can cut an angle material wound into a coil shape easily and efficiently.

[Means for solving problems]

In the present invention, the cutter can be inserted into the lower surface, that is, the inner surface, of the uppermost coil 1b of the angle material 1 which is superimposed and wound into a coil shape with the ridge line as the centripetal side, and the cutter is inserted into the upper surface of the uppermost coil 1b. The uppermost coil 1 has a chevron-shaped cutting edge 2a that can come into contact with the inner corner of the coil 1b, and the outer surface 2c, that is, the side surface adjacent to the next coil 1c, is inclined inward and downward.
When cutting b, this outer surface 2c is the next coil 1c.
By contacting the upper surface of the uppermost coil 1
The fixed blade 2 is arranged to be slightly spaced apart from the next coil 1c, and the fixed blade 2 is movable up and down along the front surface of the fixed blade 2. It has a cutting edge 3a, and the intersection line 3c where the slopes 3b and 3b' on both sides forming the cutting edge 3a intersect,
Depending on the winding diameter of the angle material 1 to be cut,
By raising it as you go forward, when cutting, the parts other than the rearmost end of the intersection line 3c are connected to the uppermost coil 1.
At the time of cutting, by avoiding contact with the ridgeline 1a of ridge line 1b and deflecting the slope 3b' on the centripetal side among the slopes 3b and 3b' toward the front and toward the centripetal side,
The above-mentioned problem is solved by forming the movable blade 3 so that the slope 3b' does not come into contact with the centripetal side surface of the uppermost coil 1b.

[Effect]

Since the fixed blade and the movable blade are shaped as described above, even if the angle material is wound with a fairly small curvature, as it is cut, the line of intersection of the cutting edge of the movable blade will align with the ridgeline of the uppermost coil. Furthermore, the slope of the cutting edge on the centripetal side never comes into contact with the centripetal side surface of the coil to be cut.

〔Example〕

Figures 1 to 4 show the topmost part of an angle member 1 that is wound in a coiled manner with the ridge line 1a as the centripetal side, and is held with the axial direction facing obliquely upward at an angle of approximately 45°. By inserting the fixed blade 2 into the lower surface of the upper coil 1b, that is, at a key point on the inner surface, and lowering the movable blade 3 along the front surface of the fixed blade 2, a state in which a part of the coil 1b is about to be cut can be avoided. It shows.

The fixed blade 2 has a chevron-shaped cutting edge 2a at the upper end.
The front shape is pentagonal, and the cutting edge 2a is in contact with the inner corner of the cut portion of the uppermost coil 1b of the angle member 1.

slopes 2b on both sides forming the cutting edge 2a of the fixed blade 2;
2b is substantially parallel to the inner surface of the angle member 1.

The outer surface 2c of the fixed blade 2, that is, the side surface close to the next coil 1c, is inclined downward from the inner surface, and the third
As clearly shown in the figure and FIG. 4, when cutting the uppermost coil 1b, this inclined outer surface 2c
However, by contacting the upper surface of the next coil 1c, the uppermost coil 1b is made to be slightly spaced apart from the next coil 1c.

The movable blade 3 is adapted to be moved up and down along the front surface of the fixed blade 2, and has a cutting edge 3a cut in an upward right-angled V shape on the lower surface of a rectangular parallelepiped block.

The line of intersection 3c where the slopes 3b and 3b' intersect on both sides forming the cutting edge 3a is raised as it goes forward, depending on the winding diameter of the angle material 1 to be cut.
At the time of cutting, the intersection line 3c is made so that any part other than the rearmost end does not hit the ridgeline 1a of the uppermost coil 1b.

In addition, the slope 3b' on the centripetal side of the cutting edge 3a is
By biasing it toward the centripetal side as it goes forward, the slope is prevented from coming into contact with the centripetal side surface of the uppermost coil 1b at the time of cutting, except for the rear end of this slope.

[Effect of idea]

In the present invention, since the fixed blade 2 and the movable blade 3 are shaped as described above, the angle material 1
However, even if it is wound with a fairly small curvature, the intersection line 3c of the cutting edge 3a of the movable blade 3 does not come into contact with the ridgeline 1c of the uppermost coil 1b during cutting, and the centripetal line at the cutting edge 3a side slope 3a
However, it does not come into contact with the centripetal side surface of the coil 1b to be cut.

Therefore, the coiled angle material can be cut smoothly and reliably, and the cut surface is clean.

[Brief explanation of the drawing]

FIG. 1 is a front view showing how the cutter of the present invention is used, FIG. 2 is a side view of FIG. 1 seen from the right, and FIG. Fourth
The figure is a longitudinal sectional view taken along the line B-B in Figure 2, Figure 5 is a perspective view of the lifting blade of the cutter of the present invention seen from the lower left, and Figure 6 is the same fixed blade seen from the upper left. FIG. 1...Angle material, 1a...Ridge line, 1b...Top coil, 1c...Next coil, 2...Fixed blade, 2a...Blade tip, 2b...Slope, 2c...Outside surface, 3 ...Elevating blade, 3a...Blade tip, 3b, 3
b′...Slope, 3c...Intersection line.

Claims (1)

[Scope of Claim for Utility Model Registration] The lower surface of the uppermost coil 1b of the angle material 1 that is superimposed and wound into a coil shape with the ridgeline as the centripetal side;
That is, it can be fitted into the inner surface, has a chevron-shaped cutting edge 2a on the upper surface that can come into contact with the inner corner of the uppermost coil 1b, and has an outer surface 2c, that is, a side surface close to the next coil 1c, on the inner side. When the uppermost coil 1b is cut by tilting it downward, the outer surface 2c comes into contact with the upper surface of the next coil 1c, thereby cutting the uppermost coil 1b into the next coil 1.
Fixed blade 2 that is spaced slightly apart from c
The fixed blade 2 is movable up and down along the front surface, and has a cutting edge 3 cut into an upper V-shape on the lower surface.
a, and both side slopes 3b, 3 forming the cutting edge 3a.
By raising the intersection line 3c where b' intersects toward the front according to the winding diameter of the angle material 1 to be cut, the ends of the intersection line 3c other than the rear end of the uppermost coil are cut. 1b, and by deflecting the slope 3b' on the centripetal side of the slopes 3b and 3b' forward and toward the centripetal side, this slope 3b' is placed on the topmost surface during cutting. A cutter made of an angle material wound into a coil and consisting of a movable blade 3 that does not come into contact with the centripetal side surface of the coil 1b.