JPH09136212A - Shape steel cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a pressing force to be efficiently used by decreasing the number of parts in a shape steel cutter. SOLUTION: A moving blades 11 is dropped vertically to cut a shape steel from a slant direction of its sectional form by providing a moving blade 11 having a cut-in part 2 formed by slantly cutting the sectional form of the shape steel to be cut and a fixed blade 14, a guide member 15 for guiding, in the vertical direction, the moving blade 11 in contact with the surface of the fixed blade 14 so that the cut-in part 2 of the moving blade 11 may be aligned with the cut-in part of the fixed blade 14, and a pressing segment 25 for pressing the moving blade 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die steel cutting device for cutting die steel such as C-shaped steel, H-shaped steel and grooved steel.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view showing a C-shaped steel 1 as an example of a shaped steel, and an example of a conventional shaped-steel cutting device used for cutting the C-shaped steel 1 into a required length. Explaining it, as shown in FIG. 7, a cut portion 2 having a cross-sectional shape of C-shaped steel 1 is provided, and a movable blade 3 in which four corners are cut off diagonally,
The cut portion 4 having the same sectional shape of the C-shaped steel 1 is provided as shown in
A fixed blade 5 having a quadrangular shape having a slightly larger outer dimension than the movable blade 3 is prepared, and the movable blade 3 and the fixed blade 5 are
As shown in the vertical front view of FIG. 9 and the XI-XI cross-sectional view of FIG. 9, the cutting device is mounted in the mounting frame 6 in a vertical posture in a state of being vertically stacked.

The inner dimension of the mounting frame 6 is such that the fixed blade 5 in the vertical posture is tightly held, and the fixed blade 5 mounted in the mounting frame 6 is fixed vertically. It is held by the mounting frame 6.

On the other hand, the movable blade 3 has a smaller size than the inside of the mounting frame 6, and the diagonal portions of the upper right and lower left in FIG. The diagonal portion is in contact with the inclined portion of the pressing piece 8 that can slide horizontally, and the upper left diagonal portion is in contact with the inclined portion of the pressing piece 9.

The pressing piece 8 is biased to the upper left by the restoring spring 10 via the lower mounting frame 6, and the pressing piece 9 can be vertically pushed down from the outside of the mounting frame 6.

When the pressing piece 9 is not pushed down, the moving blade 3 is pushed to the upper left of FIG. 9 by the pressing piece 8 and the restoring spring 10, and the upper edge and the left edge of the moving blade 3 are placed inside the mounting frame 6. Holds in contact.

Since the notch 2 of the movable blade 3 and the notch 4 of the fixed blade 5 which are held by the mounting frame 6 are arranged so as to overlap each other in a straight line, the notches which overlap in a straight line. After inserting the C-shaped steel 1 of FIG. 6 into the parts 2 and 4 and arranging the cutting point of the C-shaped steel 1 at the boundary where the movable blade 3 and the fixed blade 5 of FIG. When the push-down piece 9 of FIG. 9 is pushed down vertically from the outside of the mounting frame 6, the moving blade 3 remains in contact with the surface of the fixed blade 5 and the guide piece 7
Then, the C-shaped steel 1 is cut by the force of the restoring spring 10 being pushed downward in the lower right direction along the inclination of, and the shearing between the movable blade 3 and the fixed blade 5 is performed.

When cutting the mold steel in this manner, the mold blade can be cut with a sharp cut surface by moving the movable blade 3 in an oblique direction with respect to the sectional shape of the mold steel.

[0009]

However, in the conventional die steel cutting device shown in FIG. 9, in addition to the movable blade 3, the fixed blade 5, and the mounting frame 6, a pair of guide pieces corresponding to the shape of the movable blade 3 is used. 7
In addition, since the pressing piece 8 is required, there is a problem that the number of parts increases and the price increases.

Further, since the movable blade 3 is moved in an oblique direction by the vertical pushing force, a large loss of force is required and a large wasted pushing force is required. Therefore, a ram or the like having a large capacity must be used. There was a problem to be solved.

It is an object of the present invention to solve the above problems and to provide a low-cost die steel cutting device which has a small number of parts and can effectively utilize the pushing force.

[0012]

According to the present invention, there are provided a movable blade and a fixed blade each having a cut portion formed by cutting a sectional shape of a die steel to be cut obliquely, and the cut portion of the movable blade is a cut portion of the fixed blade. And a guide member for vertically guiding the movable blade in contact with the surface of the fixed blade so as to be aligned with the fixed blade, and a pressing piece that pushes down the movable blade, to a mold steel cutting device characterized in that With this, when the push-down piece is pushed down vertically, the moving blade is also pushed down vertically,
The section steel inserted in the notched part that is obliquely cut is cut between the notched part of the movable blade and the notched part of the fixed blade with a sharp cutting surface in the oblique direction.

Further, a guide member is vertically fixed to both sides of the surface of the fixed blade, and a groove along the edge of the guide member is provided on the surface of the fixed blade to polish the cut surface without removing the guide member. You can

[0014]

Embodiments of the present invention will be described below.

FIG. 3 is a front view showing an example of the embodiment of the movable blade 11 used in the present invention. The movable blade 11 formed in a quadrangle has a C-shaped steel 1 to be cut.
With the cross-sectional shape of C at an angle of approximately 45 degrees, C
A cut portion 2 having the same shape as the sectional shape of the shape steel 1 is provided.

On the upper surface of the movable blade 11, there is formed a recess 12 into which the lower end portion of a pressing piece described later is fitted, and on the lower surface of the movable blade 11, a spring fitting into which the upper end portion of a restoring spring described later is fitted. A recess 13 is formed.

FIG. 4 is a front view showing an example of an embodiment of the fixed blade 14 used in the present invention, and FIG. 5 is a sectional view taken along line VV of FIG. 4, in which the fixed blade 14 has vertical and horizontal dimensions. Is manufactured in a rectangular plate shape slightly larger than the moving blade 11 described above, and the plate-shaped fixed blade 14 has the same sectional shape of the C-shaped steel 1 to be cut as the moving blade 11 has. In the state, the cut portion 4 having the same shape as the cross-sectional shape of the C-section steel 1 is provided.

Guide members 15 having a quadrangular cross section as shown in FIG. 5 are fixed to the left and right sides of the surface of the fixed blade 14 by screws 16 and the like. The inner spacing between the guide members 15, 15 on both the left and right sides when fixed to the left and right sides of the surface of the fixed blade 14 may be inserted on both sides of the movable blade 11 described above so as to be densely and slidably in the vertical direction. The thickness of the guide member 15 (dimension in the vertical direction in FIG. 5) is extremely larger than the thickness of the movable blade 1.

Grooves 17 having a semicircular cross section are provided near the left and right sides of the surface of the fixed blade 14 so that the centers thereof are along the inner edges of the left and right guide members 15, 15.

FIG. 1 shows the movable blade 11 and the fixed blade 1 described above.
4 is a front view of the mounting frame 18 on which the 4 is mounted, and FIG. 2 is a plan view of FIG. 1. The mounting frame 18 includes a plate-shaped base 19 and a base 1.
The vertical frame 20 has a pair of right and left vertical frames 20 vertically fixed to the upper surface of the vertical frame 9, and an upper lid 22 fixed horizontally to the upper ends of the pair of vertical frames 20 with bolts 21. A spring fitting recess 24 into which the lower end of the restoring spring 23 is fitted is formed on the upper surface of the pedestal 19, and a through hole 26 through which the pressing piece 25 is inserted is formed in the center of the upper lid 22. .

The movable blade 11 and the fixed blade 14 are attached to the mounting frame 18.
When mounting it inside, the bolt 21 and the upper lid 22 are removed from the upper end of the vertical frame 20, and the lower end of the restoring spring 23 is fitted into the spring fitting recess 24 (see FIG. 1) on the upper surface of the base 19.

Then, the movable blade 11 is inserted between the guide members 15, 15 which are fixed to the left and right sides of the surface of the fixed blade 14 so that the back surface of the movable blade 11 is in close contact with the surface of the fixed blade 14 and the movable blade 11 When the stationary blade 14 and the fixed blade 14 are placed between a pair of left and right vertical frames 20 having a U-shaped cross section and slid downward, the lower end of the restoring spring 2 fitted in the spring fitting recess 24.
The fitting recess 13 on the lower surface of the movable blade 11 is fitted to the upper end portion of 3.

When the pressing piece 25 is inserted into the through hole 26 of the upper lid 22 and the upper lid 22 is fixed to the upper end of the vertical frame 20 with the bolt 21, the upper surface and the lower surface of the fixed blade 14 are respectively the base 1
9 is in close contact with the upper surface of 9 and the lower surface of the upper lid 22,
The fixed blade 14 is fixedly held by the mounting frame 18 in a vertical posture. Then, the movable blade 11 is biased upward by the restoring spring 23, and the upper edge of the movable blade 11 is held in a vertical posture in a state of being in contact with the lower surface of the upper lid 22.

When the movable blade 11 and the fixed blade 14 are held in the mounting frame 18 as described above, the movable blade 1
Since the notch 2 of 1 and the notch 4 of the fixed blade 14 are arranged so as to overlap with each other on a straight line, the C-shaped steel 1 of FIG. After the cutting portion of the mold steel 1 is positioned at the boundary where the movable blade 11 and the fixed blade 14 are in contact with each other, the pressing die 25 is vertically pushed down from the outside of the mounting frame 18 by a ram (not shown),
The movable blade 11 vertically descends along the guide member 15 while being in contact with the surface of the fixed blade 14.

As a result, the C-shaped steel 1 inserted into the notches 2 and 4 is cut by the cutting action of the movable blade 11 and the fixed blade 14 from the diagonal direction of the cross-sectional shape with a sharp cutting surface. Become.

The cutting surface on the back side of the movable blade 11 and the fixed blade 1
When polishing the cut surface on the front surface side of No. 4, the bolt 21 and the upper lid 22 are removed from the upper end of the vertical frame 20, and the movable blade 1
1 and the fixed blade 14 are pulled out from between a pair of left and right vertical frames 20 having a U-shaped cross section.

Since the movable blade 11 is manufactured in a plate shape,
The back cut surface can be easily polished.

The fixed blade 14 has guide members 15 and 15 fixed to the left and right sides of the surface thereof.
A groove 17 is formed on the surface of the fixed blade 14 along the inner edge of the groove 5, and the back surface of the movable blade 11 does not slide against the groove 17 so that no cutting action is performed. Therefore, the cut surface on the surface side of the fixed blade 14 is irrelevant to the portion of the groove 17, and by making this portion an escape of the abrasive, it is not necessary to remove the guide member one by one and grind unlike the conventional case, and the guide member 1
With 5 fixed, the polishing can be carried out easily.

Although the above-described embodiment of the present invention has been described with respect to the case of cutting the C-shaped steel, the shape-steel cutting device of the present invention is used for cutting the H-shaped steel, grooved steel, etc. It is also possible to use the same line to cut from a diagonal direction with a sharp cutting surface.

[0030]

According to the present invention, since the guide piece and the pressing piece are unnecessary, the number of parts is reduced and the cost is reduced, and the moving blade is vertically lowered as it is by the vertical pressing force.
Since the pressing force is effectively used to sharply cut the shape steel, it is possible to use a ram or the like having a small ability.

Further, the invention of claim 2 has an effect that the cutting surface on the surface side of the fixed blade can be easily polished with the guide member fixed.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing an example of an embodiment of a movable blade used in the present invention.

FIG. 4 is a front view showing an example of an embodiment of a fixed blade used in the present invention.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a cross-sectional view of C-type steel.

FIG. 7 is a front view of a conventional moving blade.

FIG. 8 is a front view of a conventional fixed blade.

FIG. 9 is a vertical sectional front view of a conventional die steel cutting device.

10 is a sectional view taken along line XI-XI in FIG.

[Explanation of symbols]

 2 notch part 4 notch part 11 moving blade 14 fixed blade 15 guide member 17 groove 25 pressing piece

Claims (2)

[Claims] 1. A movable blade and a fixed blade each having a cut portion formed by cutting the section steel of the die to be cut with an oblique cross-section, and the cut portion of the movable blade is aligned with the cut portion of the fixed blade. A model steel cutting device comprising: a guide member that vertically guides the movable blade that is in contact with the surface of the fixed blade; and a pressing piece that pushes down the movable blade. 2. The mold steel cutting according to claim 1, wherein guide members are vertically fixed to both sides of the fixed blade, and grooves along the edges of the guide member are provided on the surface of the fixed blade. apparatus.