JP6069252B2 - Scrap chopper - Google Patents

Description

  The present invention relates to a scrap chopper that shears belt-shaped scrap with a fixed blade body and a movable blade body.

  As this kind of scrap chopper used conventionally, the structure shown by the following patent document 1 etc. can be mentioned, for example. That is, in the conventional configuration, the strip-shaped scrap supplied between the movable blade body and the fixed blade body fixed to the base is sheared by the movable blade body and the fixed blade body. The fixed blade body is composed of a rectangular member provided with a blade at one corner extending along the width direction, and is fixed to the base at a plurality of locations by a plurality of fastening members.

JP-A-8-90329

The blade of the fixed blade body is worn as the strip scrap is repeatedly sheared. In the conventional scrap chopper as described above, the blade is provided only at one corner extending along the width direction of the fixed blade body. For this reason, when a certain fixed blade is used for a certain period of time, it is necessary to replace the fixed blade with another fixed blade. Each fixed blade body has a dimensional tolerance or dimensional difference due to reuse after cutting, etc., so when replacing the fixed blade body with another fixed blade body, use an adjustment member called shim etc. It is necessary to finely adjust the fixed position of the fixed blade. Since this adjustment work requires an appropriate amount of time, it is necessary to stop the strip scrap shearing process for a predetermined time each time the fixed blade is used for a certain period .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a scrap chopper that can shorten the time for stopping the shearing treatment of the strip-shaped scrap.

A scrap chopper according to the present invention includes a movable blade body and a fixed blade body fixed to a base, and the strip scrap supplied between the fixed blade body and the movable blade body is fixed to the fixed blade body and the movable blade body. The fixed blade body is formed of a rectangular member having blades provided at four corners extending along the width direction, and is fixed to the base by the fastening member. Is fixed, and the direction of the fixed blade body is reversed in the vertical direction and the front and back direction, so that the blades at the four corners are used for shearing the strip scrap, and the movable blade body is The four corners are provided with a plurality of curved portions having the same radius of curvature as the rotation radius of the movable blade body arranged in the width direction, and a fixed blade for the base by the fastening member. The body is released and the fixed blade By being displaced in the width direction, it is configured so as blade located at each curved portion is used to shear the strip scrap.

According to the scrap chopper of the present invention, the fixed blade body is composed of a rectangular member provided with blades at four corners extending along the width direction, and the fixed blade body is fixed to the base by the fastening member. Since the fixed blade body is released and the direction of the fixed blade body is reversed in the vertical direction and the front and back direction, the blades at the four corners are configured to be used for shearing the strip scrap. Time to stop processing can be shortened.

It is a side view which shows the scrap chopper by Embodiment 1 of this invention. It is a front view which shows the movable blade body and fixed blade body of FIG. It is a perspective view which shows the fixed blade body of FIG. It is a perspective view which shows the fixed blade body of the scrap chopper by Embodiment 2 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a side view showing a scrap chopper according to Embodiment 1 of the present invention, FIG. 2 is a front view showing a movable blade body 1 and a fixed blade body 2 in FIG. 1, and FIG. 3 is a fixed blade in FIG. 3 is a perspective view showing a body 2. FIG. As shown in FIGS. 1 and 2, the scrap chopper of the present embodiment includes two movable blade bodies 1 and a fixed blade body 2. The number of movable blades 1 may be 1 or 3 or more.

  As shown in FIGS. 1 and 2, each movable blade body 1 is formed of a metal disk-like member and is pivotally supported by a rotating body 10. That is, each movable blade body 1 is provided so as to be rotatable about the shaft body 10a of the rotating body 10, and is provided so as to be capable of rotating about the shaft body 1a of each movable blade body 1. The rotation radius of the movable blade body 1 is a value obtained by adding the distance D between the center position of the shaft body 10 a of the rotation body 10 and the center position of the shaft body 1 a of the movable blade body 1 and the radius d of the movable blade body 1. (See FIG. 2).

The fixed blade body 2 is composed of a metal rectangular member shown in FIG. The four corners 2co _{1 to} 2co ₄ (upper surface angle 2co ₁ , upper back corner 2co ₂ , lower surface angle 2co ₃ and lower back corner 2co ₄ ) extending along the width direction 2w are provided with blades. At least the surfaces of these blades are nitrided. The width direction 2w is a direction parallel to the surface on which the movable blade body 1 is displaced, and is a direction orthogonal to the height direction in which the movable blade body 1 contacts and separates from the fixed blade body 2. The blade is provided at the four corners _2co 1 _{~2co 4,} the angle between the two surfaces forming each corner _2co 1 _{~2co 4} which means that there is a right angle. The nitriding treatment on the blade surface means that the blade surface is cured by allowing nitrogen to penetrate into the blade surface.

The four corners 2co _{1 to} 2co ₄ are respectively formed with curved portions 2cu having the same radius of curvature as the rotational radius (distance D + radius d) of the movable blade body 1. Of course, cutting the four corners _2co 1 _{~2co 4} is also provided in the curved portion 2Cu.

  One fastening hole 2h communicated to the back surface is provided on the front surface of the fixed blade body 2. The front and back surfaces of the fixed blade 2 have a point-symmetric shape, and the fastening hole 2h is provided at the center position of the front and back surfaces. As shown in FIG. 1, the fixed blade body 2 is fixed to the base 21 at one place by a fastening member 20 (bolt 20a and nut 20b). A bolt 20a constituting the fastening member 20 is inserted into the fastening hole 2h. An adjusting member 22 called a shim or the like is interposed between the fixed blade body 2 and the base 21. The adjustment member 22 is for adjusting the fixed position of the fixed blade body 2 so as to correct the dimensional difference for each fixed blade body 2.

A strip-shaped scrap 3 is continuously supplied between the movable blade 1 rotating with the rotating body 10 and the fixed blade 2 fixed to the base 21. The strip-shaped scrap 3 is constituted by, for example, trim scraps or the like cut off on both sides in the width direction of the cold-rolled steel strip. The strip-shaped scrap 3 is sheared to a predetermined length by the movable blade body 1 and the fixed blade body 2. Specifically, the strip scrap 3 is sheared by _{one of the four} corners 2co _{1 to} 2co ₄ and the outer edge of the movable blade 1 that rotates and moves.

Here, the blade currently used for shearing the strip-shaped scrap 3 is a blade having an upper surface angle 2co ₁ (see FIG. 3). At this time, when the fixed blade body 2 is fixed to the base 21 by the fastening member 20 and the direction of the fixed blade body 2 is reversed in the vertical direction, the blade of the lower surface angle 2co ₃ is used to shear the strip scrap 3. Can be used. Similarly, when the blade having the upper front angle 2co ₁ is used, the blade having the upper back angle 2co ₂ can be used for shearing the strip scrap 3 by reversing the direction of the fixed blade body 2 in the front / back direction. Further, when the blade having the upper front angle 2co ₁ is used, the blade of the lower back angle 2co ₄ is used for shearing the strip scrap 3 by reversing the direction of the fixed blade body 2 in the front and back direction and the vertical direction. be able to. That is, the blades of the four corners 2 co _{1 to 2} co ₄ of the fixed blade 2 can be used for shearing the strip scrap 3 by reversing the direction of the fixed blade 2 in the vertical direction and the front and back direction. Thereby, compared with the conventional structure in which the blade is provided only at one corner of the fixed blade body, the period of use of one fixed blade body can be quadrupled. For this reason, the effort which changes the adjustment member 22 can be reduced, and the time which stops the shearing process of the strip-shaped scrap 3 can be shortened. Further, since the fixed blade body 2 is fixed to the base 21 at one place by the fastening member 20, the fixing blade body 2 can be easily fixed, and the time for stopping the shearing treatment of the strip scrap 3 can be shortened. .

According to such a scrap chopper, the fixed blade body 2 is constituted by a rectangular member in which blades are provided at _four corners 2co _{1 to} 2co ₄ extending along the width direction 2w, and the fastening member 20 The fixed blade body 2 is fixed to the base 21 at one location by the fastening member 20, and the fixed blade body 2 is fixed to the base 21 by the fastening member 20, and the orientation of the fixed blade body 2 is reversed in the vertical direction and the front-back direction. Since the blades of the _four corners 2co _{1 to} 2co ₄ are configured to be used for shearing the strip scrap 3, the time for stopping the shear treatment of the strip scrap 3 can be shortened.

  Moreover, since the nitriding process is performed on the surface of the blade, the wear of the blade can be slowed, and the period during which one blade can be used for shearing the strip scrap 3 can be increased. Thereby, the time which stops the shearing process of the strip-shaped scrap 3 can be shortened.

Embodiment 2. FIG.
FIG. 4 is a perspective view showing a fixed blade body 2 of a scrap chopper according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to the same or similar structure as Embodiment 1. FIG. As shown in FIG. 4, the four corners 2co _{1 to} 2co ₄ of the fixed blade body 2 of the present embodiment have a plurality of curves having the same radius of curvature as the rotational radius (distance D + radius d) of the movable blade body 1. The part 2cu is provided side by side in the width direction 2w. Specifically, two curved section 2cu are provided in each corner _2co 1 _{~2co 4.}

The fixed blade body 2 is released from the base 21 by the fastening member 20 and the fixed blade body 2 is displaced in the width direction 2w, so that the blades located at the curved portions 2cu are used for shearing the strip scrap 3. Is done. That is, the fixed blade body 2 of the embodiment (each corner 2co ₁ ~2co ₄ into two curved portions 2cu fixed blade body 2 is provided with) is the one as compared with the configuration of the first embodiment fixed The usage period of the blade can be doubled, and the usage period of one fixed blade can be increased by 8 times compared to the conventional configuration. Each corner _2co 1 _{~2co 4} by the provision a number of curved portions 2Cu, it is possible to further lengthen the one period of use of the fixed blade body. In addition, although the fixed blade body 2 of FIG. 4 is provided with a plurality of fastening holes 2 h, the fixed blade body 2 is fixed to the base 21 at one place by the fastening member 20. Other configurations are the same as those of the first embodiment.

In such a scrap chopper, the four corners 2CO ₁ ～2Co _4, a plurality of curved portions 2cu having the same radius of curvature as the radius of rotation of the movable cutter blade 1 (the distance D + radius d) are provided side by side in the width direction 2w The fixed blade body 2 is released from the base 21 by the fastening member 20 and the fixed blade body 2 is displaced in the width direction 2w, so that the blades positioned at the curved portions 2cu are sheared by the strip scrap 3. Therefore, the use period of one fixed blade body can be extended as compared with the configuration of the first embodiment, and the labor for changing the adjustment member 22 can be further reduced. Thereby, the time which stops the shearing process of the strip-shaped scrap 3 can further be shortened.

1 the movable cutter blade 2 fixed cutter blade 2co ₁ ~2co _{4 4} one corner 2cu curved section 20 the fastening member 21 base plate 3 strip scrap

Claims (3)

A movable blade body and a fixed blade body fixed to a base are provided, and the strip scrap supplied between the fixed blade body and the movable blade body is sheared by the fixed blade body and the movable blade body. A scrap chopper,
The fixed blade body is constituted by a rectangular member provided with blades at four corners extending along the width direction ,
The fixation of the fixed blade body with respect to the base by the fastening member is released, and the direction of the fixed blade body is reversed in the vertical direction and the front and back direction, so that the four corner blades shear the strip scrap. It is configured to be used,
The movable blade body is provided so as to be able to rotate and move,
At the four corners, a plurality of curved portions having the same radius of curvature as the rotation radius of the movable blade body are provided side by side in the width direction,
When the fixed blade body is fixed to the base by the fastening member and the fixed blade body is displaced in the width direction, the blades located at the curved portions are used for shearing the strip-shaped scrap. A scrap chopper characterized by being configured as described above . The scrap chopper according to claim 1 , wherein the fixed blade body is fixed to the base at one place by a fastening member . The scrap chopper according to claim 1 or 2, wherein a surface of the blade is nitrided.

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