JP3240215U - rotor and cutter blade - Google Patents

Abstract

A cutting rotor and a cutter blade are provided that reduce running costs as much as possible. A cutting rotor (3) has a plurality of rotor blades (33), each of which has a cutter blade (43) detachably attached to a leading edge (33f) in the direction of rotation. extends over the entire leading edge of the rotor and is characterized by having two cutting edges on the side facing in the direction of rotation. [Selection drawing] Fig. 3

Description

The present invention relates to a waste paper dissolving apparatus for dissolving collected waste paper for reuse of waste paper. The present invention relates to a used paper cutting rotor for finely cutting mixed and dissolved used paper and a cutter blade attachable to and detachable from the rotor.

2. Description of the Related Art Conventionally, a pulper (waste paper dissolving apparatus) is known which has a cylindrical raw material receiving tank and a rotor provided at the center of the horizontal bottom of the tank. The stock receiving tank is continuously supplied with water from a water supply pipe, and stock such as waste paper is supplied in the supplied water (see, for example, Patent Document 1).

The rotor has a drive shaft, and a drive pulley or a speed reducer is attached to the lower end of the drive shaft, and is rotated by the motor to rotate the paper material pulverizing rotor. When the rotor is rotated, the water supplied into the stock receiving tank is swirled around the central axis of the stock receiving tank, and the stock such as used paper is swirled accordingly.

JP 2003-049376 A

By the way, the conventional rotor finely cuts waste paper or the like at the leading edge of the rotor on the leading end side in the rotating direction, but the leading edge of the rotor may be damaged or worn due to factors such as long-term use. When the leading edge of the rotor is damaged or worn, the entire rotor must be replaced, and therefore the running cost of the rotor for cutting waste paper becomes extremely high.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of reducing the running cost of a rotor.

In order to achieve the above object, a rotor for cutting according to the present invention comprises a plurality of rotor blades, each of which has a cutter blade detachably attached to a leading edge in the direction of rotation. wherein the cutter blade extends over the entire leading edge of the rotor and has two cutting edges on the side facing in the direction of rotation.

According to the present invention, the running cost of the rotor can be reduced as much as possible.

It is a figure which shows a used paper dissolving apparatus. Fig. 4 is a vertical cross-sectional view of the bottom portion of the dissolving tank of the used paper dissolving apparatus; 2 is a plan view of a rotor according to the embodiment; FIG. It is a rear view of the rotor according to the present embodiment. FIG. 4 is a cross-sectional view taken along line VV in FIG. 3; 1 is a plan view of a cutter blade according to this embodiment; FIG. FIG. 4 is a rear view of the cutter blade according to the embodiment; It is a figure which shows the state where one cutting blade part was worn. FIG. 4 is a diagram showing a state in which the cutter blade is removed from the front blade; It is a figure which shows the state which turned upside down the cutter blade. It is a figure which shows the state which attached the cutter blade to the front blade.

First, an outline of a representative embodiment of the present invention will be described. In the following description, as an example, the reference numerals on the drawings corresponding to the constituent elements of the device are described with parentheses.

[1] The rotor (3) for cutting according to the present embodiment includes a plurality of rotor blades (33), and each of the plurality of rotor blades (33) has a leading edge (33f) in the direction of rotation (R). having one detachably mounted cutter blade (43), the cutter blade (43) extending over the entire leading edge (33f) of the rotor (33) and facing in the direction of rotation (R); It is characterized by having two cutting blades (431, 432) in the.

[2] In one aspect of the rotor (3) described in [1] above, the cutter blades (43) are formed line-symmetrically with respect to the center line (CL) in the extending direction along the leading edge (33f). It is

[3] The cutter blade (43) according to the present embodiment is detachably attached to each of a plurality of rotor blades (33) provided on the rotor (3) for cutting, and (33) on the front edge (33f), extending over the entire front edge (33f) and provided with two cutting blades (431, 432) on the side facing the direction of rotation (R) It is characterized by

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the drawings are schematic, and it should be noted that the dimensional relationship of each element, the ratio of each element, and the like may differ from reality. Even between the drawings, there are cases where portions having different dimensional relationships, ratios, etc. are included.

<Rotor configuration>
FIG. 1 is a diagram showing a used paper dissolving apparatus 1. As shown in FIG. The used paper dissolving apparatus 1 includes a dissolving tank 2 , a used paper cutting rotor 3 , a screen plate 6 , and a rotation drive section 7 . The dissolution tank 2 is formed in a D-shape in plan view, and accommodates collected used paper, water for dissolution, chemicals, and the like. The dissolving tank 2 has an opening 21 formed in the upper part. Through the opening 21 , waste paper or a bale of stacked and compressed waste paper conveyed by the conveyor C, water, and the like are introduced into the dissolving tank 2 . In this embodiment, the dissolving tank 2 is formed in a D shape when viewed from above, but the shape of the dissolving tank 2 when viewed from above is not limited to the D shape, and may be other shapes such as an O shape and a rectangle. may

FIG. 2 is a longitudinal sectional view of the bottom portion of the dissolving tank 2 of the used paper dissolving apparatus 1. As shown in FIG. The rotor 3 according to the present embodiment is provided at the center of the bottom surface of the dissolving tank 2 to create a swirling flow and cut the dissolved used paper. The screen plate 6 is provided below the rotor 3, and is formed with a plurality of round holes or the like for filtering cut pieces of waste paper. The rotary drive unit 7 is formed of, for example, a rotary motor or the like, is connected to the rotor 3 via a rotary shaft, and transmits rotary power to the rotor 3 .

The rotor 3 according to the present embodiment is a part of the used paper dissolving apparatus 1 that cuts the used paper or the like that has been put into the dissolving tank 2 into fine pieces. It should be noted that the rotor 3 according to the present embodiment is not provided in a specific used paper dissolving apparatus 1, but can also be provided in a known used paper dissolving apparatus.

FIG. 3 is a plan view of the rotor 3 according to this embodiment. FIG. 4 is a rear view of the rotor 3 according to this embodiment. FIG. 5 is a cross-sectional view taken along line VV in FIG. The rotor 3 includes a rotor body 31 , six rotor blades 33 and pumping vanes 35 .

For convenience of explanation, when the rotor 3 is attached to the dissolving tank 2, the upper surface 3u of the rotor 3 faces upward, and the lower surface of the rotor 3 faces downward (the screen plate 6 and the rotary drive unit 7). 3d. The rotor 3 rotates relative to the dissolving tank 2 around an axis 3x serving as the center of rotation.

The rotor main body 31 is a portion that constitutes the center of rotation of the used paper dissolving apparatus 1 and is circular in plan view. The rotor body 31 has a fixing portion 311 , a rotary blade mounting portion 313 and a cap 315 . The fixed portion 311 has a portion formed in a cylindrical shape, and is fixed to, for example, the rotary drive portion 7 such as a motor.

The rotary blade mounting portion 313 is a circular member in a plan view that is fixed to the fixing portion 311 with a mounting bolt B or the like. Six rotor blades 33 are attached to the outer peripheral portion of the rotor blade mounting portion 313 at predetermined intervals in the circumferential direction, for example, by welding or the like.

The cap 315 is circular in plan view and concentrically attached to the fixing portion 311 from the upper surface 3u side with a bolt B1. The cap 315 is formed in a hemispherical shape with the apex of the axis 3x.

The rotor blade 33 is attached so as to radially extend from the rotor blade attachment portion 313 . . A cutter blade 43, which will be described later, is attached to a front edge 33f, which is an edge facing the rotation direction R of the rotor 3. As shown in FIG. In the present embodiment, six rotor blades 33 are attached to the rotor blade mounting portion 313, but the number of the rotor blades 33 is not particularly limited. It may be attached to the attachment portion 313 .

Each rotor blade 33 has a front blade 41 and a cutter blade 43 . The front blade 41 is attached to the front edge 33f by, for example, bolts B2. The front blade 41 extends from the root of the rotor blade 33 to the rotor blade mounting portion 313 to the tip of the rotor blade 33 in the radial direction. The front blade 41 projects toward the lower surface 3 d of the rotor blade 33 when attached to the rotor blade 33 .

The front blade 41 has recesses 42 . The concave portion 42 is formed concavely in a portion facing the rotation direction R on the side of the lower surface 3 d when the front blade 41 is attached to the rotor blade 33 . The front blade 41 is L-shaped or substantially L-shaped in a cross-sectional shape that intersects the extending direction. A cutter blade 43 , which will be described later, is detachably attached to the concave portion 42 . A plurality of through holes 41 h are formed in the surface of the recess 42 of the front blade 41 that contacts the cutter blade 43 . The holes 41h are provided at predetermined intervals from each other in the extending direction of the front blade 41. As shown in FIG. The front blade 41 is formed with a hole (not shown) in which a knock pin for alignment of the cutter blade 43 is attached.

6 is a plan view of the cutter blade 43. FIG. FIG. 7 is a front view of the cutter blade 43. FIG. The cutter blade 43 is made of, for example, steel, and the front surface 43f facing the direction of rotation is formed in a convex curved shape (arc shape) so that each rotor blade 33 has a curved shape (arc shape). there is The cutter blade 43 is provided over the entire front edge 33 f of the rotor blade 33 . The cutter blade 43 is formed line-symmetrically with respect to the center line CL in the extending direction. Both ends of the cutter blade 43 in the extending direction are chamfered.

A plurality of holes 43h and a hole 43h' are formed in the back surface 43b of the cutter blade 43 that contacts the front blade 41, that is, the surface facing away from the rotating direction of the rotor 3. As shown in FIG. The holes 43 h are provided at predetermined intervals in the extending direction of the cutter blade 43 . One hole 43h of the plurality of holes 43h is formed on the center line CL of the cutter blade 43, and the other holes 43h are formed at positions symmetrical to the hole 43h on the center line CL. there is The cutter blade 43 is fastened to the front blade 41 by aligning the holes 41h and 43h in the concave portion 42 of the front blade 41 and inserting the bolt B2. The hole 43h' is aligned with a hole (not shown) formed on the front blade 41 side and fitted with a dowel pin.

The cutter blade 43 has two cutting edge portions 431 and 432 . The cutting blades 431 and 432 are formed on the top and bottom of the rotor 3 when attached to the recess 42 of the front blade 41, that is, on the corners of the cutter blade 43 on the upper surface 3u and the lower surface 3d. More specifically, when the cutter blade 43 is attached to the front blade 41, the cutting blade 431 is formed at an angle formed by one surface 43u facing the front blade 41 and the front surface 43f. 432 is formed at an angle formed by the front surface 43f and the other surface 43d facing away from the one surface 43u when the cutter blade 43 is attached to the front blade 41. As shown in FIG.

The pumping vane 35 is integrally provided on the upper surface 3u side of the rotor 3 by, for example, welding, in order to agitate the water and the like in the dissolving tank 2 and the used paper. The pumping vanes 35 protrude from the upper surface 3u along the axis 3x. The pumping vanes 35 extend radially and circumferentially from the rotor body 31 in an arc. In the present embodiment, the pumping vanes 35 are provided on every other rotor blade 33 , but the present invention is not limited to this, and the pumping vanes 35 may be provided on all the rotor blades 33 .

The pumping vanes 35 extend from the rotor body 31 to the tip of the rotor blades 33 in the radial direction. The pumping vane 35 extends in an arc from the leading edge 33f on the root side of the rotor blade 33 with respect to the rotor body 31 to the trailing edge 33b on the tip 33t side of the rotor blade 33 (Fig. 3).

The used paper dissolving apparatus 1 conveys the used paper or the bale in which the used paper is laminated and compressed by the conveyor C, and throws it into the dissolving tank 2 from the opening 21 formed in the upper part of the dissolving tank 2 . A dissolving liquid such as water is separately introduced from the opening 21 . The used paper and water charged into the dissolving tank 2 are circulated around the axis 3x of the rotor 3 by the rotation of the rotor 3 causing a swirling flow.

The used paper and water charged into the dissolving tank 2 are mixed by turning the rotor 3 into a swirling flow, whereby the used paper is separated into fine pieces of used paper and sucked downward by the vortex at the center. After that, the separated pieces of used paper are further finely cut and dissolved by a cutter blade 43 which is a rotating blade provided on the rotor 3 .

The waste paper pieces further finely cut in the dissolving tank 2 are dissolved into a slurry, and then filtered through a large number of holes formed in a disk-shaped screen plate 6 provided below the rotor 3. be done.

When the cutter blade 43 cuts waste paper pieces for a long period of time, the cutting blade portion 432 wears and the function as a cutting blade deteriorates. When the cutting blade portion 432 is worn out, it is usually necessary to prepare a new cutter blade 43 and replace it. However, in the rotor 3 according to this embodiment, it is not necessary to prepare a new cutter blade 43 .

FIG. 8A is a diagram showing a state in which one of the cutting blades 432 is worn. 8B is a diagram showing a state in which the cutter blade 43 is removed from the front blade 41. FIG. FIG. 8C is a diagram showing a state in which the cutter blade 43 is turned upside down. 8D is a diagram showing a state in which the cutter blade 43 is attached to the front blade 41. FIG.

When wear of the cutting edge portion 432 of the cutter blade 43 of the rotor blade 33 is confirmed, the bolt B2 connecting the front blade 41 and the cutter blade 43 is removed. Next, the cutting edge portion 432 of the cutter blade 43 and the cutting edge portion 431 are turned upside down so that the cutting edge portion 431 of the cutter blade 43 is positioned on the lower surface 3d side of the rotor 3, A cutter blade 43 is installed in the recess 42 of the front blade 41 .

In this state, the hole 41h of the front blade 41 and the hole 43h of the cutter blade 43 are aligned, and the front blade 41 and the cutter blade 43 are fastened with the bolt B2. As a result, the unworn cutting edge 431 is located on the side of the lower surface 3d of the rotor 3, and the used paper pieces can be cut again.

According to the rotor 3 of this embodiment, the cutter blade 43 is detachably attached to the front blade 41 and has two cutting blades 431 and 432 . As a result, when one of the cutting blades 431; 432 is worn out and cannot fully exhibit its cutting function, the cutter blade 43 can be removed from the front blade 41 and turned upside down. The used paper pieces can be cut again by the cutting blades 432 and 431 of the . That is, even if one of the cutting blades 431; 432 wears out, it is not necessary to replace the entire cutter blade 43, and the running cost can be reduced compared to a cutter blade having only one cutting blade.

Further, since the cutter blade 43 is formed symmetrically with respect to the center line CL, it can be attached to the front blade 41 even if the cutter blade 43 is removed and turned over.

<Others>
Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes all aspects included in the concept of the present invention and the scope of utility model registration claims. Moreover, each configuration may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. Further, for example, the shape, material, arrangement, size, etc. of each component in the above-described embodiment may be appropriately changed according to the specific usage of the present invention.

DESCRIPTION OF SYMBOLS 1... Waste paper dissolving apparatus 2... Dissolving tank 3... Rotor 33f... Front edge 43... Cutter blade, 431... Cutting blade part, 432... Cutting blade part

Claims (3)

Equipped with multiple rotor blades,
Each of the plurality of rotor blades has one cutter blade detachably attached to the leading edge in the direction of rotation,
The cutter blade is
A rotor for cutting, characterized in that it extends over the entire leading edge of the rotor blade and has two cutting edges on the side facing in the direction of rotation. 2. The rotor according to claim 1, wherein the cutter blade is formed line-symmetrically with respect to a center in an extending direction along the leading edge. Detachably attached to each of the plurality of rotor blades provided on the rotor for cutting,
A cutter blade formed on the leading edge of the rotor blade in the direction of rotation so as to extend over the entire leading edge, and comprising two cutting edges on the side facing the direction of rotation.

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