JP2949468B2 - Shredding device with rotary blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for shredding swarf such as chips generated by cutting and waste such as empty cans.

[0002]

2. Description of the Related Art A conventional shredding device having a rotary blade is shown in FIG.
As shown in the figure, the drive rotary shaft 2 is inserted through the opposite side wall of the housing 1 having an input opening at the upper part and a discharge opening at the lower part, and a number of rotary blades 3 are fixed on the shaft by a key groove. A shredded object input hopper 4 surrounding the blade 3 from below and expanding upward is provided, and a number of screen holes 5 for the shredded shredded object are provided at the bottom of the hopper 4.

A fixed blade 7 is attached to a fixed blade mounting base 6 which is mounted in the longitudinal direction in parallel with the rotary shaft 2 at a position at a rotation angle of substantially 90 ° from the vertex of the blade orbit circle of the blade of the rotary blade. 8A and 8B are attached so as to be able to advance and retreat horizontally in the radial direction with respect to the axis of the rotating shaft 2 to adjust the clearance between the fixed blade and the rotating blade. The cutting portion 9 is constituted by the cutting edge.

[0004] When an object to be shredded, for example, a wound cutting chip C, is thrown in from an input hopper 4, the object C is conveyed to a cutting section 9 by a rotary blade 3 rotating in the direction of an arrow, and cut. Then, it is discharged below the screen hole 5 and discharged.

[0005]

In the above-mentioned prior art, the adjustment of the cutting edge of the fixed blade is performed by reciprocating horizontally in the radial direction at a rotation angle of approximately 90 ° from the vertex of the cutting edge rotation path of the rotary blade. Since the cutting portion 9 is formed at a position tangential to the cutting edge rotation orbit circle of the rotary blade in the vertical direction, the retention space A of the chopped object formed immediately above the cut portion 9 of the chopped object C has a bottom. Therefore, a state in which the objects to be cut are suspended in the shelves appears in the retaining space A, which hinders the smooth flow of the objects to be cut C to the cutting section 9.

Even if the above-mentioned hanging state of the shelf does not appear, if the chopped material is supplied in a deep funnel shape, the weight of the chopped material in the hopper increases when the amount charged into the hopper increases. There is a problem in that the material to be cut in the funnel-shaped retention space A is weighted and compressed downward, and is excessively supplied to the cutting portion 9 so that the rotating blade is overloaded and the rotation is stopped. ing.

Further, when a lump of foreign matter B which is difficult to cut is mixed, the rotating blade 3 is overloaded at the cutting portion 9 and the rotating shaft 2 is stopped. Breakage of the fixed blade edge occurs.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a fixed blade so that the space above a cut-piece storage space formed immediately above a cutting portion is expanded. disposed in the upper range rotational angle approximately s 60 ° the apex of the semicircular portion of the cutting edge rotational trajectories circle of the rotary blade, the to-be shred residence space formed cut portion directly by times Utateha the fixed blade An inverted recirculation guide plate for shredded material is provided, and a hard foreign matter discharge port is provided on a flow-down guide plate on the side opposite to the fixed blade mounting side of the input hopper.

[0009]

Since the fixed blade is disposed at an angle of rotation of approximately 60 ° from the vertex of the rotary orbit circle of the rotary blade, the tangential direction of the rotary blade at the cutting portion with respect to the cutting edge rotary orbit circle is substantially equal to the vertical direction. Since it is inclined by 30 ° or more, the shredded material staying space is formed in a funnel shape having a large opening degree with a shallow bottom,
The load due to the weight of the shredded object in the hopper is reduced, and the flow of the shredded object in the space is facilitated. The provision of the reversing reflux guide plate promotes fluidization and overloads the rotary blade. Is eliminated. Then, the mixed hard foreign matter is carried to and discharged from the hard foreign matter discharge port on the opposite side of the cut portion by reversing the rotary blade.

[0010]

FIG. 1 is a sectional view of the present invention, in which a plurality of rotary blades 3 are attached to a drive rotary shaft 2 which is inserted between opposing side walls of a housing 1 and is rotatably supported by key grooves. A loading hopper 10 is mounted on an upper portion of the rotary blade 3, a screen hole 5 is provided on a lower portion, and the fixed blade 11 has an arc surface having a rotation angle of approximately 60 ° from the vertex of the cutting edge rotation orbit circle of the rotary blade 3. Is fixed to the fixed blade mounting base 12 so as to be movable in the tangential direction, and the fixed blade 11 shown is mounted in the tangential direction at a rotation angle position of approximately 45 °.

Therefore, the staying space 14 in the cut portion 13 of the chopped object C is formed in the shape of an expanding funnel having a shallow bottom, and the reversal reflux guide plate 15A also serves as the flow-down guide plate of the hopper 10, but is separate. It may be provided, and the reverse reflux guide plate 15A
Is desirably experimentally set to be in the range of 30 ° to 45 ° from the horizontal plane. Although the fixed blades are arranged in the tangential direction in the above embodiment, they may be arranged in the radial direction. Further, a discharge port 16 for the hard foreign matter B is provided on the flow-down guide plate 15B on the opposite side of the hopper 10 from the fixed blade mounting side.

FIG. 2 is a cross-sectional view of a second embodiment of the present invention. The object C has a high rigidity or elasticity and may be repelled and repelled from a stay space having the shape shown in FIG. 1 is different from FIG. 1 in that a shatterproof plate 17 is provided near the cut portion of the stay space 14A so that the shredded object C is not scattered out of the stay space by the prevent plate 17. It was done.

As shown in FIG. 3, when the hard foreign matter B bites into the cut portion while the rotary blade 3 is rotating forward in the direction of the arrow, an overload acts on the rotary shaft 2. When the rotation of the rotary shaft 2 is stopped in the direction of the arrow as shown in FIG. 4 after the rotation of the rotary shaft 2 is stopped in the direction of the arrow as shown in FIG. It is discharged out of the discharge port 16 and removed from the hopper. After discharging the foreign matter, the rotary blade 2 is driven to rotate forward again to start shredding.

[0014]

According to the present invention, since the fixed blade is provided at a position within a range of a rotation angle of about 60 ° from the vertex of the cutting edge orbit circle of the rotary blade, the tangent to the arc surface in the range is not perpendicular but inclined. Since the space for storing the object to be cut just above the cut portion formed along the inclined tangent line can have a shape with a shallow bottom and an expanded upper portion, the weighted compression of the object to be cut in the space can be achieved. The effect is reduced and fluidization is facilitated, and by providing a reversal reflux guide plate in the space, the reversal reflux of the shredded material that has become easily fluidized is forcibly performed, so that an overload acts on the cutting portion. Instead, an appropriate amount of the object to be shredded is always refluxed to the cutting section, and the shredding efficiency can be improved.

Further, even if hard foreign matter that is difficult to cut is mixed into the hopper and bites into the cut portion, the rotary blade is rotated in the reverse direction, so that the hopper is easily discharged out of the hopper through the discharge port provided on the side surface of the hopper. This eliminates the need for foreign matter removal work, thereby achieving labor savings.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of a second embodiment of the present invention.

FIG. 3 is an explanatory sectional view when a hard foreign object is caught.

FIG. 4 is an explanatory sectional view when a hard foreign object is discharged.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Rotating shaft 3 Rotating blade 8A, 8B Fixed blade fine-adjustment bolt 10, 10A Input hopper 11 Fixed blade 12 Fixed blade mounting base floor 13 Cutting part 14, 14A Retention space 15A, 15B Reverse reflux guide plate B Hard foreign matter C Shredded object

Claims (1)

(57) [Claims] 1. A shredder with a fixed blade and a rotary blade
And rotate the fixed blade from the top of the circle
Arranged in the range of 60 °, just above the cutting part of fixed blade and rotary blade
Reversal reflux guide of the shredded object in the formed shredded material retention space
A plate is provided, and further, the object to be cut is supplied downward on the rotary blade.
On the downflow guide plate on the side opposite to the fixed blade mounting side of the charging hopper
Equipped with a rotary blade characterized by an outlet for hard foreign matter
Shredding device.