JP2001224975A - Cutting treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting treatment device which is capable of finely cutting and discharging materials to be cut without further adding a cutter unit to the device. SOLUTION: The device is so constituted that the discharged materials to be cut are once accepted at a flat part 53 of a fixing jig 5 and that the materials to be cut are again cut by a top end edge 52a and a blade edge of a cutter plate 4 and are discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus for cutting metal scraps, which are objects to be cut, generated in various factories.

[0002]

2. Description of the Related Art As the above-mentioned conventional cutting apparatus, for example, Japanese Utility Model Publication No. 5-43861 discloses a disk-shaped cutter section provided with a plurality of blade sections at equal intervals on the outer periphery and a blade of the blade section. A pair of cutter units having a smaller diameter than the bottom circle and a collar portion slightly thicker than the thickness of the cutter alternately attached to the rotation shaft are engaged with each other so that the cutter portions of both cutter units are alternately positioned, And it was mounted between the two cutter units by rotating the rotating shafts of the two cutter units in opposite directions so that no gap was formed between the cutting edge circle of one cutter unit and the other collar unit. 2. Description of the Related Art There is known a cutting processing device which grips and cuts an object to be cut by each blade portion, and discharges the cut object from between both cutter units.

[0003]

In the above-mentioned conventional cutting apparatus, for example, when slender metal chips are put between the cutter units in a posture substantially parallel to the rotation axis, the metal chips are removed from the two cutter units. Is cut by the blade portion, and cut into a length approximately equal to the thickness of the cutter portion and discharged. However, when the elongated metal scraps are gripped by the blade from the end in a posture perpendicular to both rotating shafts, they are discharged between the tip of the blade and the collar without being cut finely. Occurs.

[0004] As described in Japanese Utility Model Publication No. 5-32194, by arranging two pairs of cutter units up and down, an object to be cut that has not been finely cut by the first stage cutter unit is reduced to two stages. It is conceivable to cut again with an eye cutter unit. However, if a further pair of cutter units are provided in this way, the number of parts is greatly increased and the cost is increased.

[0005] In view of the above problems, an object of the present invention is to provide a cutting apparatus capable of finely cutting and discharging an object to be cut without further adding a cutter unit.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a disk-shaped cutter having a plurality of blades at equal intervals on the outer periphery and a blade bottom circle of the blades. A pair of cutter units, each having a small diameter and a collar portion slightly thicker than the thickness of the cutter, alternately attached to the rotation shaft, are engaged with each other so that the cutter portions of both cutter units are alternately positioned, and Attachment is made so that there is almost no gap between the cutting edge circle of the cutter part and the other collar part, and the cuts put between both cutter units by rotating the rotation axes of both cutter units in opposite directions. In a cutting apparatus for gripping and cutting an object with each blade portion and discharging the object from between the cutter units, the cutter is inserted between the cutter portions of the cutter units from the dispensing side of the object to be cut, and The collar portion located between the portions and the cutting edge circle of the cutter portion of the other cutter unit opposed to the collar portion are close to each other with almost no gap, and a substantially closed space is formed between the collar portion and the cutting edge circle. A fixing jig is provided. Here, the expression “a pair of cutter units is attached so that there is substantially no gap between the cutting edge circle of one cutter portion and the other collar portion”.
The term "almost" means that there may be some gaps between the cutting edge circle of one cutter section and the other collar section, as well as a case where there is no gap completely. This gap may be caused by wear of the cutting edge of the cutter portion, or may be intentionally formed. The point is that the object to be cut can be pushed or cut off by the cutting edge of one cutter portion and the other collar portion.
However, ideally, it is preferable that there is no gap between the cutting edge circle of one cutter portion and the other collar portion. Also,
Here, "almost" in the expression "approximately" is completely close to the collar portion located between the cutter portions and the cutting edge circle of the cutter portion of the other cutter unit facing the collar portion with almost no gap. This means, of course, that there is no gap, and that the fixing jig may be close to the cutting edge of the collar portion and the cutter portion with some gap. In particular, the gap between the fixing jig and the cutting edge of the cutter portion may be caused by wear of the cutting edge of the cutter portion, or the gap may be intentionally formed. However, ideally, the fixing jig preferably has no gap between the cutting edge circle of one of the cutting edges of the collar portion and the cutting portion and the other collar portion.

An object to be cut, which is discharged without being finely cut by the two cutter units, is sandwiched between the tip of the blade portion of one of the cutter units and the collar portion of the other cutter unit, and is discharged without applying a shearing force. You. However, since the fixing jig is close to the collar portion without any gap, the cut object that has not been finely cut is blocked by the fixing jig and is not discharged straight, but stays in the space. Since the object to be cut is continuously pushed into the space, the object to be cut in the space moves to the cutter portion side facing the collar portion. Since the blade portion of the cutter portion is constantly moving while facing the space, the object to be cut is slightly caught by the blade portion that has moved next when it comes into the cutting edge circle, and is likely to be dragged out of the space. Since the fixing jig is close to the cutting edge circle without any gap, the object to be cut is sandwiched between the cutting edge and the fixing jig when it is caught by the blade portion and dragged out of the space, so that the shearing force acts to cut the fixing jig.

Incidentally, a large gap is formed between the fixing jig and the cutter section between the blade sections, and it is conceivable that an object to be cut spills out through the gap without being cut. In this case, the fixing jig is formed with an arc-shaped portion extending in the moving direction of the blade portion along the cutting edge circle of the cutter portion, and the length of the arc-shaped portion is longer than the mutual interval of the blade portions. By doing so, the gap between the blade portions is closed by the arc-shaped portion, and the object to be cut is prevented from spilling out.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a cutting apparatus according to the present invention. A pair of rotating shafts 2a and 2b arranged in parallel to each other are rotatably supported in the cutting apparatus 1. A V-pulley is attached to the right end of one of the rotating shafts 2a in the drawing, and is connected to a driving motor (not shown) via a V-belt 22. On the other hand, the left ends of the two rotating shafts 2a and 2b in the figure are interconnected by a pair of gears (not shown). Therefore, when one of the rotating shafts 2a is rotated by the driving motor, 1
The rotational force is transmitted to the other rotating shaft 2b via the pair of gears, and the other rotating shaft 2b rotates in the opposite direction in synchronization with the one rotating shaft 2a. A plurality of cutter blocks 3 are attached to each of the rotating shafts 2a and 2b so as to rotate together with the rotating shafts 2a and 2b. Each cutter block 3 includes four cutter plate portions 4, three collar portions 30 a sandwiched between the cutter plate portions 4, and three collar portions 30 a slightly wider than the thickness of the cutter plate portion 4, and a collar portion 30 b having half the thickness of the collar portion 30 a. Are integrally formed. 1 on the outer periphery of each cutter plate 4
Six blade portions are formed, and as shown in FIG. 2, the blade edge 41 of the blade portion is formed to be inclined by 20 degrees with respect to a direction parallel to the rotation axis. The rake face 42 is formed in an arc shape. Further, the four blade portions are formed so as to be out of phase by 2.5 degrees in order, and the blade edges 41 are set so as to be spirally arranged with respect to the rotation axis as shown in FIG. . The left and right sides of the cutter unit 3 attached to the rotating shaft 2a and the cutter unit 3 attached to the rotating shaft 2b are reversed. 42 was set so as to face the rotation direction. In addition, a cutter unit is constituted by the rotating shaft 2 a or the rotating shaft 2 b and the cutter block 3.

Referring to FIGS. 3 and 4, in the present invention, a fixing jig 5 is provided below the left and right cutter units. The fixing jig 5 is configured by arranging a pair of jig blocks 5a and 5b along the cutter unit and fastening them to each other via a jig plate 5c. Jig block 5
The arc-shaped portion 52 corresponding to the cutting edge circle drawn by the trajectory of the cutting edge 41 and the corner portion 51 corresponding to the collar portions 30a and 30b are provided at a.
Are provided alternately. In addition, the flat part 5 is
3, the leading edge of the flat portion 53 is made to coincide with the upper edge 52a of the other arc-shaped portion 52. And the corner 51
The fixing jig 5 was attached so that the fins were close to the collar parts 30a and 30b without any gap, and the arc-shaped part 52 was close to the cutting edge circle of the blade part without any gap.

Then, as shown in FIG. 4, a substantially triangular space 6 surrounded by the cutting edge circle of one of the cutter units, the collar portions 30a and 30b of the other cutter unit, and the flat portion 53 of the fixing jig 5 is formed. Is done. The object to be cut is supplied from above in this figure, sheared between the cutter plates 4 of both cutter units, and discharged into the space 6. In addition, cutting edge 4
The object to be cut which is not cut finely and is caught between the first and the collar portions 30a and 30b is also discharged into the space 6.
The cut object discharged into the space 6 has the
Since it is closed by the a.30b and the flat part 53, it is pushed out toward the cutter plate part 4. Then, the object to be cut is sandwiched between the cutting edge 41 and the upper edge 52a of the arc-shaped portion 52 and cut. In addition, the length of the arc-shaped portion 2 is set longer than the interval between the blade portions,
Before the object to be cut in the space 6 is cut by the cutting edge 41 and the upper end edge 52a, the object is prevented from slipping on the arc-shaped portion 52.

[0012]

The effect of a typical example of the present invention will be described. A disk-shaped cutter portion having a plurality of blade portions at equal intervals on the outer periphery and a smaller diameter than the blade bottom circle of the blade portion. There is a pair of cutter units in which collar parts slightly thicker than the thickness of the cutter are alternately attached to the rotating shaft so that the cutter parts of both cutter units are alternately positioned,
Attach so that there is almost no gap between the cutting edge circle of one cutter unit and the other collar unit, and rotate the rotating shafts of both cutter units in opposite directions to insert them between both cutter units. In a cutting processing device that grips and cuts the cut object with each blade portion and discharges the cut object between the cutter units, the cut object is inserted between the cutter units of each cutter unit from the payout side of the cut object,
A space substantially close to the collar portion located between the cutter portions and the cutting edge circle of the cutter portion of the other cutter unit facing the collar portion with substantially no gap, and substantially closed between the collar portion and the cutting edge circle. Is provided, the object to be cut can be finely cut and discharged without further adding a cutter unit.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an embodiment of the present invention.

FIG. 2 is a partial perspective view showing details of a blade portion.

FIG. 3 is a perspective view showing the shapes of a cutter unit and a fixing jig.

FIG. 4 is a diagram showing a positional relationship between a cutter unit and a fixing jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting processing apparatus 4 Cutter plate part 30a Collar part 30b Collar part 5 Fixing jig

Claims (2)

[Claims] 1. A disk-shaped cutter portion provided with a plurality of blade portions at equal intervals on an outer periphery and a collar portion having a diameter smaller than a blade bottom circle of the blade portion and slightly larger than a thickness of the cutter are rotated. A pair of cutter units alternately mounted on the shaft are meshed with each other so that the cutter portions of both cutter units are alternately positioned, and a gap between the cutting edge circle of one cutter portion and the other collar portion is provided.取 り 付 け Mount so that there is no gap,
A cutting processing device for rotating the rotating shafts of both cutter units in opposite directions to grip and cut the object to be cut between the cutter units with each blade, and discharging the cut object from between the cutter units. In the above, the cutting part is inserted between the cutter parts of each cutter unit from the dispensing side of the object, the collar part located between the cutter parts and the cutting edge circle of the cutter part of the other cutter unit facing the collar part. A cutting jig provided with a fixing jig which is substantially close to and has a substantially closed space between the collar portion and the cutting edge circle. 2. The fixing jig has an arc-shaped portion extending in the direction of movement of the blade portion along the cutting edge circle of the cutter portion, and the length of the arc-shaped portion is longer than the mutual interval of the blade portions. The cutting apparatus according to claim 1, wherein the cutting processing is performed.