JP5089242B2 - Fixed blade of shear crusher - Google Patents

Description

  The present invention relates to a fixed blade of a shear crusher that shears and crushes an object to be processed such as industrial waste with a rotary blade and a fixed blade, and a method for manufacturing the fixed blade of the shear crusher.

  In general, a shear crusher that shears and crushes an object to be processed such as industrial waste includes a hopper for storing the object to be processed, a crushing chamber formed below the hopper, and a cylindrical shape disposed in the crushing chamber. A rotor rotary blade having a rotary blade fixed to the circumferential surface of the rotor, a fixed blade cooperating with the rotor rotary blade, a pusher storage frame body provided in communication with the crushing chamber, and along the pusher storage frame body And a pusher that pushes the workpiece to the rotor rotary blade and the fixed blade side (see, for example, Patent Documents 1 and 2).

  This shearing crusher collaborates by shearing and crushing an object to be processed when the rotary blade and the fixed blade have a predetermined clearance during shearing. Since the shearing crusher is fixed in a state where the fixed blade is inclined at a predetermined angle with respect to the installation surface, the clearance does not become constant at the same time in the entire blade area of the rotary blade and the fixed blade. The predetermined clearance is set to move continuously toward the original. Therefore, in the shear crusher, a small irregular clearance is generated in the entire blade area, and as a result, for example, a wrap film or a film sheet-like workpiece cannot be sheared and the shear crushing efficiency is improved. In some cases, it may be lowered.

  Therefore, a uniaxial shearing type crusher has been proposed as a shearing crusher that can keep the clearance between the rotary blade and the fixed blade constant during shearing (see Patent Document 3). As shown in FIG. 9, the rotary blade 100 of this uniaxial shear crusher is formed in a square column shape having a square cross section, and the two ridge lines adjacent to each other in a substantially V shape among the four ridge lines are cut into the blade portion 101. , 101. The angle φ formed by the two ridge lines of the blade portions 101 and 101 is 90 degrees. The rotary blade 100 is fixed to the circumferential surface of the rotor.

  The fixed blade 110 is formed in a long plate shape, and is adjacent to each other in a substantially V shape corresponding to the blade portions 101 and 101 formed by two adjacent ridge lines in the substantially V shape of the plurality of rotary blades 100. The blade portion 111 is composed of two ridge lines. Since the two ridge lines as the blade portions 101 and 101 of the rotary blade 100 are straight lines having an angle of φ = 90 degrees, the rotary blade on the rake face 112 that is the surface of the fixed blade 110 is used. The trajectory P of 100 blade portions 101 is obtained by analysis, and the trajectory P is set to an angle β (β <φ) that changes smaller than the angle φ. In this case, since φ = 90 degrees, it is smaller than 90 degrees (β = about 80 degrees <90), and the locus P has a concave curve shape. Adjacent ridge lines that can be held form a blade portion 111 having a concave curve shape.

  Therefore, as shown in FIG. 9, on the rake face 112 of the fixed blade 110, the blade portion 101 formed of the linear ridge line of the rotary blade 100 has a certain clearance C with respect to the blade portion 111 of the fixed blade 110. It will be in a state where it can be held.

  Therefore, the blade portion 101 of the rotary blade 100 and the blade portion 111 of the fixed blade 110 are subjected to linear crushing when the blade portion 101 of the rotary blade 100 and the blade portion 111 of the fixed blade 110 are close to each other at the time of shearing. The crushing resistance is smaller than the accompanying large crushing resistance.

  Therefore, on the rake face of the fixed blade that is sheared and crushed, the blade portions 101 and 101 formed of the linear ridge line of the rotary blade 100 maintain a certain clearance with respect to the blade portions 111 and 111 of the fixed blade 110. It is possible to form a uniform and uniform clearance at the cutting edge, middle part and cutting edge. Therefore, for example, it is possible to satisfactorily perform shearing and crushing of a wrap film or a film sheet-like workpiece, and to improve the shearing and crushing efficiency accordingly.

JP 2000-325807 A JP 2000-325811 A Japanese Patent Laid-Open No. 11-244720

However, there are the following problems in the configuration of the fixed blade and the rotary blade of the conventional shear crusher.
The conventional shearing crusher receives the stress during crushing at the ridgeline on the surface of the fixed blade, so the stress on the ridgeline concentrates and the ridgeline part of the fixed blade wears quickly, so the shearing crushing efficiency tends to decrease. I have.
In addition, when an impact force is applied to the fixed blade due to the mixing of foreign matter, it becomes a starting point of cracking and causes the entire fixed blade to crack.
Furthermore, since it is necessary to process the fixed blade into a concave curve shape that matches the locus of the ridgeline of the rotary blade, the processing is complicated and the processing cost of the fixed blade is high.

  The present invention has been devised in view of the above-described problems, and it is difficult to wear the fixed blade, the crushing efficiency does not decrease, and it does not become a starting point for cracking of the fixed blade. It is an object of the present invention to provide a fixed blade for a shear crusher and a method for manufacturing the fixed blade for a shear crusher, in which the processing of the blade is not complicated and does not increase the processing cost.

In order to solve the above-described problem, the fixed blade of the shear crusher according to the present invention is a blade portion that forms a triangular blade using two sides of a quadrangular prism, and includes a cutting edge at a central top portion, and the top portion. A cutting edge having a left and right cutting edge formed in a straight line from the cutting edge to the left and right, the cutting edge at the top being a cutting edge, and a blade portion having an end far from the top at the left and right cutting edges as a cutting edge A fixed blade of a shear crusher that is installed in a crushing chamber of a shear crusher having a rotating blade and crushes and crushes an object to be crushed in cooperation with the rotating blade while maintaining a predetermined clearance. The fixed blade includes a thick plate-shaped main body portion and a fixed blade portion formed in a triangular concave and convex shape by continuously forming a triangular prism-shaped blade portion provided on an end surface of the main body portion, On the top surface against a horizontal plane A rake face having an angle of 45 to 45 degrees is formed, and the fixed blade is formed along a rotation trajectory of the rotary blade from cutting edges formed at both ends of a V-shape forming an edge of the rake face. The shear trajectory surface is formed so that the width becomes wider from the blade edge toward the blade edge, and the cutting edge of the fixed blade is formed to be equal to or shorter than the cutting edge of the rotary blade It was.
With this configuration, the fixed blade of the shear crusher is covered with a clearance for performing shearing in a range where the cutting edge of the rotary blade faces the shear locus surface continuous with the cutting edge of the fixed blade. The processed material is sheared and crushed.

Further, in the fixed blade of the shear crusher, the shear locus surface is formed so as to increase in width from the blade tip of the fixed blade toward the blade base.
By configuring in this way, the fixed blade of the shear crusher can maintain a predetermined clearance for the tip of the cutting edge of the rotary blade to be long for shearing the workpiece, and shear the workpiece. It can be done reliably.

And in the fixed blade of the shear crusher, the rake face of the fixed blade portion is formed in parallel to the installation surface of the fixed blade, or the rake surface of the fixed blade portion is the installation surface of the fixed blade. It was set as the structure formed inclining in the range of 5-45 degree | times with respect to it. In addition, it is preferable to set a fixed blade part so that a rake surface may be inclined in the range of 5-45 degree | times with respect to a horizontal surface.
By configuring in this way, the fixed blade of the shear crusher operates so as to have a predetermined clearance gradually and continuously from the cutting edge of the rotating blade to the blade edge when cooperating with the rotating blade. Mitigates impact when shearing objects.

Furthermore, in the method for manufacturing the fixed blade of the shear crusher, a first step of forming a rectangular parallelepiped with the metal serving as the fixed blade, and a rotary blade cooperating with the fixed blade at a position along the long piece of the rectangular parallelepiped And a third step of forming a shear trajectory surface along the rotation trajectory of the rotary blade over a required width from the cutting edge of the fixed blade portion. Is.
By doing in this way, in the manufacturing method of the fixed blade of a shearing crusher, since the shear locus surface which cooperates with the cutting edge of a rotary blade is surface shape, it is easy to manufacture.

  Moreover, it is a manufacturing method of the fixed blade of the shear crusher described in Claim 1, Comprising: The 1st step which forms a rectangular parallelepiped with the metal used as the said fixed blade, and the said fixation in the position along the long side of the said rectangular parallelepiped A second step of forming a fixed blade portion corresponding to the rotary blade cooperating with the blade, and along a rotation locus of the rotary blade over a required width from the cutting edge of the fixed blade portion in the rotation direction of the rotary blade. A rake face forming step of forming a rake face in a range of 5 to 45 degrees on the upper end face of the fixed blade portion, and a third step of forming a shear locus surface. Or between the second step and the third step.

  As a result, in the method of manufacturing the fixed blade of the shear crusher, even if the rake face is formed, the shear locus surface cooperating with the cutting edge of the rotary blade is formed in a plane shape. Cheap.

The fixed blade of the shear crusher according to the present invention has the following excellent effects.
Since the fixed blade of the shear crusher forms a shear locus surface along the rotation locus of the rotary blade from the cutting edge of the fixed blade portion, it rotates the clearance for shearing in cooperation with the cutting edge of the rotary blade. A certain length can be secured along the trajectory.
For this reason, the fixed blade of the shear crusher suppresses the progress of wear, suppresses the decrease in shear efficiency, prevents the occurrence of cracks, extends the service life of the fixed blade, and is compared with conventional processing. The cutting edge can be machined at a low machining cost.

  Further, in the method for manufacturing the fixed blade of the shearing crusher, the shear locus surface cooperating with the cutting edge of the rotary blade has a surface shape, so that it is easy to manufacture and the processing cost is low.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view schematically showing the overall configuration of a shear crusher with a part thereof in cross section, FIG. Is a plan view showing the relationship between a fixed blade and a rotary blade of the shearing crusher with a part omitted, FIG. FIG. 5C is a perspective view of the shear crusher with a part of the fixed blade omitted, and FIGS. 5A to 5D are fixed blades of the shear crusher. It is a schematic diagram which shows typically the shearing state by a rotary blade.

  As shown in FIGS. 1A and 1B, the shear crusher 20 includes a storage hopper 21 that stores a workpiece W to be sheared and crushed, and a crushing chamber H provided on the lower side of the storage hopper 21. A pusher storage frame body 22 installed in communication with the crushing chamber H, a pusher 23 provided so as to reciprocate within the pusher storage frame body 22, and a driving means 24 for reciprocating the pusher 23. A fixed pedestal 25 installed in the crushing chamber H on the moving end side of the pusher 23 moved by the driving means 24, a fixed blade 1 detachably installed on the fixed pedestal 25, and the fixed blade 1, a rotor rotary blade 10 rotatably provided in the crushing chamber H at a position cooperating with 1, a sieve mesh portion 26 disposed below the rotor rotary blade 10 and the fixed blade 1 (shear blade), and the sieve mesh Breaks placed below the portion 26 And a transport mechanism 27 pieces Wh.

  The shear crusher 20 shears the workpiece W stored in the storage hopper 21 and stored in the crushing chamber H by the fixed blade 1 that cooperates with the rotary blade 14 of the rotor rotary blade 10 rotated by the drive motor 19. Then, it is crushed to form a crushed piece Wh having a predetermined size and conveyed to a predetermined position by the conveying mechanism 27. Note that when the workpiece W is sheared and crushed by the rotor rotary blade 10 and the fixed blade 1, the shear crusher 20 crushes the workpiece W with a pusher 23 in a preset pressing state. .

As shown in FIGS. 2 and 3, the rotor rotary blade 10 of the shear crusher 20 forms a rotor 11 provided on a rotating shaft that is rotated by a drive motor 19, and a recess 12 at a predetermined position on the circumferential surface of the rotor 11. And a rotary blade 14 that is detachably attached by attachment means 13 such as a bolt.
The rotary blade 14 is arranged so as to be appropriately shifted in the rotational direction with respect to a straight line parallel to the axial direction of the rotor 11, and is provided at a position where the adjacent rotary blade 14 cooperates with the fixed blade with a time difference. ing. Here, the rotary blade 14 is formed in a quadrangular prism shape, and the column angle of the quadrangular prism is fixed along the recess 12 formed on the surface of the rotor 11. The rotary blade 14 has a square thick plate-like (flat rectangular parallelepiped) blade portion 15 fixed to the one end side thereof by the attachment means 13a.

  The blade portion 15 of the rotary blade 14 forms a triangular blade using two sides of a square, and a cutting edge 15a at the top of the center, and left and right cutting edges formed linearly from side to side from the cutting edge 15a. 15b and 15c, the cutting edge 15a at the top is the cutting edge, and the ends far from the top of the left and right cutting edges 15b and 15c are the cutting edge. Cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14 are formed to be equal to or longer than a cutting edge Eg of the fixed blade 1 described later. Since the cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14 are longer than the cutting edge Eg of the fixed blade 1, the cutting edge Eg of the fixed blade 1 can be used as a shearing region during shearing over the entire region. Efficiency can be improved.

  As shown in FIGS. 2 and 3, the fixed blade 1 of the shear crusher 20 is installed at a position where the blade portion 15 of the rotary blade 14 has a predetermined clearance. Here, the fixed blade 1 is detachably attached to a fixed base 25 of the shear crusher 20 with a bolt or the like.

  The fixed blade 1 includes a thick plate-shaped main body portion 2 and a fixed blade portion 3 in which one blade portion 3A formed in the shape of a triangular prism provided on the end face of the main body portion 2 is continuously formed in a triangular uneven wave shape. ing. As shown in FIG. 3, the fixed blade 1 has five blade portions 3 </ b> A and two triangle halves as one unit length, and the one unit length is the length of the rotary blade 14. It is arranged and used in a straight line so as to correspond to this.

  Here, as shown in FIG. 7 (a), the fixed blade 1 has a fixed blade portion 3 formed on one end of the main body portion 2, and when the fixed blade portion 3 is worn, The fixed blade 1 is exchanged.

  4A, 4B, and 4C, the blade portion 3A of the fixed blade 1 is formed such that the rake face 5 of the upper surface (upper end surface) has an inclination angle α with respect to the horizontal plane. Yes. The inclination angle α is desirably set in the range of 5 to 45 degrees, preferably in the range of 7 to 15 degrees, and will be described as a configuration set to 7 degrees as an example.

  When the fixed blade 1 is set to be horizontal and the inclination angle α is less than 5 degrees, the state in which the fixed blade 1 and the rotary blade 14 are gradually approaching cannot be secured, and when the inclined angle α exceeds 45 degrees, The range in which the fixed blade 1 and the rotary blade 14 cooperate is too narrow. Therefore, it is desirable that the inclination angle α is in the range of 5 to 45 degrees, more preferably in the range of 7 to 15 degrees.

  The fixed blade 1 forms a cutting edge Eg between the blade portions 3A and 3A at V-shaped positions that are both end portions of the rake face 5, and from the cutting edge Eg along the rotation locus of the rotary blade 14. A shear locus surface 4 is formed with a predetermined width. The blade portion 3A has a vertical surface 6 continuously downward from the cutting edge Ee at the lower end of the shear locus surface 4.

  As shown in FIG. 4, the shear trajectory surface 4 is formed such that the width interval increases from the top (blade edge) side of the triangular prism of the blade portion 3 </ b> A toward the main body portion 2 side (blade base side). The shear locus surface 4 is composed of left and right locus side surfaces 4b and 4c between the blade portions 3A and 3A, and the position on the blade base side (main body portion side) with which the locus side surfaces 4b and 4c come into contact is determined. The locus 4a will be described, and the blade edge side of the locus side surfaces 4b and 4c will be described as the blade edge locus 4d.

  As shown in FIGS. 4 (a), 5 (b), and 5 (c), the shear locus surface 4 is formed along the rotation locus of the cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14 with the cutting edge 15b. , 15c and a curved surface in the rotational direction of the rotary blade 14 so as to maintain a clearance of a predetermined interval.

  As shown in FIG. 5C, the shear locus surface 4 is such that the height of the tip Ka of the cutting edge 15 a at the top of the rotary blade 14 is such that the end Se in the blade root locus 4 a of the cutting edge Eg of the fixed blade 1. The width of the cutting edge locus 4a in which the height of the trailing edge Ke of the cutting edge of the rotary blade 14 is the same as the height of the starting edge Es of the cutting edge Eg in the cutting edge locus 4d of the fixed blade 1 Is set as The width of the cutting edge locus 4d of the shear locus surface 4 is set to be smaller than the cutting edge locus 4a. Therefore, the shear locus surface 4 is formed to have a width that continuously spreads from the width of the blade locus 4d toward the width of the blade locus 4a.

As shown in FIG. 5, the cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14 are formed longer than the cutting edge Eg of the fixed blade 1, so that the entire region of the cutting edge Eg of the fixed blade 1 is a shear region. Can be used as
In addition, when the position of the rear ends Ke of the cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14 is set to the position of the top portion that divides the two ridge lines of the square portion of the blade portion 15, the cutting edge 15b 15c and the cutting edge Eg are set to have the same length.

The shear locus surface 4 of the fixed blade 1 described here only needs to have a wide width with respect to the cutting edges 15b and 15c in the blade portion 15 of the rotary blade 14, and the widths of the blade edge locus 4d and the blade root locus 4a are set to be different. The width may be the same.
Next, the operation of shearing and crushing the workpiece W (see FIG. 1) with the fixed blade 1 and the rotary blade 14 will be described with reference to FIG.

As shown in FIG. 5A, when the workpiece 14 is between the rotary blade 14 and the fixed blade 1 when the rotary blade 14 approaches the fixed blade 1 by the rotation of the rotor 11, the rotary blade 14 further It is sandwiched between the fixed blade 1 and the rotary blade 14 in the vicinity of the fixed blade 1.
Then, as shown in FIG. 5B, the tip Ka of the cutting edge 15a in the blade portion 15 of the rotary blade 14 is as shown in FIG. 5C from the blade base start end Ss of the cutting edge Eg of the fixed blade 1. Furthermore, the state of the set clearance is maintained until the cutting edge 15a, 15b, 15c in the blade portion 15 of the rotary blade 14 exceeds the cutting edge Ee of the fixed blade 1 after rotating to the end Se of the fixed blade 1. It maintains and acts so that the to-be-processed object W (refer FIG. 1) may be sheared.

Note that the rotary blade 14 has cutting edges 15a, 15b, 15c in the blade portion 15 having a rake face 5 on the fixed blade 1, so that the cutting edge Ee of the fixed blade 1 and the blade edge side gradually toward the blade base side. It operates to have a predetermined clearance.
As shown in FIG. 5D, when the rotary blade 14 further rotates, when the cutting edges 15a, 15b, 15c in the blade portion 15 exceed the cutting edge Ee of the fixed blade 1, the fixed blade 1 and the clearance between the rotary blades 14 are increased.
As shown in FIGS. 5A to 5D, the fixed blade 1 and the rotary blade 14 cooperate to shear and crush the workpiece W.

In addition, when the fixed blade 1 is manufactured, it is preferable that the fixed blade 1 is manufactured in the order shown in FIG.
As shown in FIG. 6A, first, a rectangular parallelepiped A3 in which a thick plate, an ingot, or a forged piece is cut out to a predetermined size is formed from a suitable metal or metal alloy as the fixed blade 1 (first step). Then, as shown in FIG. 6 (b), a formed body A2 is formed by cutting the rectangular parallelepiped A3 to form a portion equivalent to the main body 2 and the rake face 5 (rake face forming step). Furthermore, as shown in FIG.6 (c), while forming the part used as the fixed blade part 3 along the long side of the one side of the main-body part 2 (2nd step), the formation body which formed the attachment hole for attachment Let A1. Note that the attachment holes may be formed in the process of FIG. Further, when the rake face 5 is not formed, the fixed blade 1 is formed by performing the first step to the third step.

Next, as shown in FIG.6 (d), it cuts so that the shear locus surface 4 may be formed from the scoop surface 5 of the fixed blade part 3 (3rd step). Thus, if the shear locus surface 4 is provided and the blade portion 3A is formed, the fixed blade 1 is manufactured by performing finishing processing such as deburring and carburizing and quenching.
Note that the rake face 5 may be formed after the fixed blade portion 3 is formed and before the shear locus surface 4 is formed.

Next, a procedure for crushing the workpiece W using the shear crusher 20 will be described.
As shown in FIG. 1, first, a workpiece W is put into a storage hopper 21 of a shear crusher 20 to store a predetermined amount. Then, the workpiece W is pressed against the crushing chamber H with a predetermined pressure by the pusher 23, and the rotor rotary blade 10 is rotated at a predetermined rotation speed by driving the drive motor 19 to cooperate with the fixed blade 1. The work W in the crushing chamber H is crushed sequentially. Then, when the workpiece W is crushed to become a crushed piece Wh and has a size that can pass through the sieve mesh part 26, it falls downward from the sieve mesh part 26 and is conveyed by the conveying mechanism 27. If the crushed crushed pieces Wh cannot pass through the sieve mesh portion 26, the crushed pieces Wh are returned to the crushing chamber H by the rotary blade 14 and pulverized again.

When the workpiece W is sheared by the fixed blade 1 and the rotor rotary blade 10, the cutting edges 15a, 15b, 15c of the blade portion 15 of the rotary blade 14 are within the range where the shear locus surface 4 of the fixed blade is the region. A predetermined clearance for shearing the workpiece W is maintained.
In addition, the inclination angle α of the rake face 5 of the fixed blade 1 is preferably set in the range of 5 to 45 degrees. In particular, the fixed blade 1 is set parallel to the horizontal plane as shown in FIG. Is convenient in relation to the rotary blade 14. This is because when the rotary blade 14 becomes a preset clearance when the fixed blade 1 and the workpiece W are sheared, it gradually gradually continues from the front end of the blade portion 15 of the rotary blade 14 toward the rear end. Since the blade 3A of the fixed blade 1 approaches the blade edge from the blade base, the workpiece W is easily sheared.

  Therefore, the fixed blade 1 and the rotary blade 14 improve the shearing ability with respect to the workpiece W. Since the fixed blade 1 faces the blade portion 15 of the rotary blade 14 as a surface to ensure clearance, the fixed blade 1 is unlikely to become a starting point of wear and cracking, and the service life can be extended without lowering the shear efficiency. It becomes possible.

  As described above, the fixed blade 1 of the shear crusher 20 has a configuration in which the fixed blade portion 3 is integrally formed with the main body portion 2, but the portion where the shear locus surface 4 of the fixed blade 1 is formed is a separate body. (It is configured as the blade portion 15 of the rotary blade 14), and may be configured to be detachably attached by a bolt or the like.

  Moreover, the structure of the fixed blade 1 may be as shown in FIGS. In FIG. 7, the components already described are denoted by the same reference numerals and description thereof is omitted. That is, as shown in FIG. 7B, the fixed blade 30 may have a configuration in which the fixed blade portions 3 and 3 are provided on the upper portions on both sides of the main body portion 2. With this configuration, the fixed blade 30 can be replaced with a worn blade by changing the direction to the fixed blade portion 3 on the opposite side.

Further, as shown in FIG. 7C, the fixed blade 40 may have a configuration in which the fixed blade portions 3 and 3 are provided on the upper and lower portions on the side of the main body portion 2. With such a configuration, the fixed blade 40 can be replaced with a new fixed blade portion 3 by reversing the front and back.
Further, as shown in FIG. 7 (d), the fixed blade 50 may have a configuration in which fixed blade portions 3, 3, 3, 3 are provided on the upper and lower portions on both sides of the main body portion 2. With such a configuration, one fixed blade 50 can use the fixed blade portion 3 four times.

  Further, the shear crusher 20 has been described with the pusher 23 being arranged in parallel to the horizontal device installation surface, but it may be configured as shown in FIG. FIG. 8A is a cross-sectional view schematically showing another configuration of the shear crusher with a part in cross section, and FIG. 8B is a side view showing the arrangement of the rotary blade and the fixed blade. In addition, the same structure as already demonstrated attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 8A, the shear crusher 20A is arranged with the pusher storage frame body 22A inclined. And the fixed blade 1 is being fixed with the volt | bolt etc. to the fixed base 25A which makes the attachment surface of the crushing chamber H an inclined surface. When the fixed blade 1 is installed in an inclined state, as shown in FIG. 5, the cutting edges 15 b and 15 c in the blade portion 15 of the rotary blade 14 that secures the shear locus surface 4 and a predetermined clearance are provided at the tip ends thereof. When Ka rotates beyond the end Se of the shear locus surface 4, the height is located at the start edge Es of the cutting edge Eg in the blade locus 4d of the fixed blade 1.

  In the shear crusher 20A, the inclination angle α (see FIG. 4) of the rake face 5 of the fixed blade 1 is set to 0 degree, that is, the rake face 5 of the fixed blade 1 is formed parallel to the installation surface. 1 can be brought close to the state of the rotary blade 14 and the fixed blade 1 configured as shown in FIG. That is, even if the rake face 5 is parallel to the installation surface, the installation surface is in an inclined state, and therefore the fixed blade of the fixed blade 1 gradually gradually from the blade tip of the blade portion 15 of the rotary blade 14 to the blade edge. It comes close to the part 3, and the impact of the shearing of the fixed blade 1 and the rotary blade 14 can be reduced.

  In the fixed blade according to the above-described embodiment, the main body portion and the fixed blade portion are integrally formed of the same material, but the fixed blade according to the present invention is not limited to this. For example, the fixed blade may be formed by forming a part of the fixed blade including the cutting edge and the shear locus surface separately, and fixing the fixed blade to the other part of the fixed blade by brazing or bolting. Accordingly, a part of the fixed blade including the cutting edge and the shear locus surface can be formed of a hard material having excellent wear resistance, and the other part can be formed of a material that can be easily processed.

It is sectional drawing which shows typically the whole structure of the shearing crusher which concerns on this invention, making a part a cross section. It is a perspective view which shows the relationship between the fixed blade and rotary blade of the shear crusher which concerns on this invention in a partial cross section. It is a top view which abbreviate | omits and shows the relationship between the fixed blade and rotary blade of the shearing crusher which concerns on this invention. (A) is a side view showing a part of the fixed blade of the shear crusher according to the present invention in a sectional view, (b) is a plan view showing a part of the fixed blade of the shear crusher according to the present invention, (c) ) Is a perspective view showing a part of the fixed blade of the shear crusher according to the present invention. (A)-(d) is a schematic diagram which shows typically the shearing state by the fixed blade and rotary blade of the shearing crusher which concerns on this invention. (A)-(d) is a schematic diagram which shows typically the process of manufacturing the fixed blade of the shearing crusher which concerns on this invention. (A) is the top view and sectional drawing which show the fixed blade of the shearing crusher which concerns on this invention, (b)-(d) is the top view and sectional drawing which show the other structure of a fixed blade, respectively. (A) is sectional drawing which shows typically the other structure of the shearing crusher which concerns on this invention by making a part into a cross section, (b) is a side view which shows arrangement | positioning of a rotary blade and a fixed blade. It is a schematic diagram which shows the state of the clearance of the fixed blade and rotary blade of the conventional shearing crusher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed blade 2 Main body part 3 Fixed blade part 3A Blade part 4 Shear locus surface 4a Blade root locus 4b Track side surface 4d Blade edge locus 6 Vertical surface 10 Rotor rotary blade 11 Rotor 12 Recessed portion 13 Attachment means 13a Attachment means 14 Rotary blade 15 Blade part 15a Cutting edge 15b Cutting edge 19 Drive motor 20 Shear crusher 20A Shear crusher 21 Storage hopper 22 Pusher storage frame body 22A Pusher storage frame body 23 Pusher 24 Drive means 25 Fixed base 25A Fixed base 26 Sieving net section 27 Conveying mechanism A1 formation Body A2 Forming body A3 Rectangular body Eg Cutting edge Es Start edge Ee Cutting edge H Crushing chamber Ka Tip Ke Rear edge Se End Ss Blade base start W W Processed object Wh Fragmented piece

Claims (2)

A blade portion that forms a triangular blade using two sides of a quadrangular prism, and has a cutting edge at the top of the center, and left and right cutting edges that are linearly formed to the left and right from the cutting edge of the top. and, wherein the cutting edge of the top and the cutting edge, is installed in the crushing chamber of a shear crushing machine having a rotary blade having a blade portion to the blade source to the end which is further from the top of the left and right cutting edge, the to be crushed treated with a fixed blade of the shearing crusher for crushing and shearing cooperate keeping the rotary blade and a predetermined clearance,
The fixed blade includes a thick plate-shaped main body portion and a fixed blade portion formed in a triangular concave and convex shape continuously by a triangular column-shaped blade portion provided on an end surface of the main body portion, and an upper surface of the fixed blade portion A rake face having an angle of 5 to 45 degrees with respect to the horizontal plane,
A shear trajectory surface is formed so that the width becomes wider from the cutting edge of the fixed blade along the rotation trajectory of the rotary blade from the cutting edge formed at both ends of the V-shape forming the edge of the rake face toward the base of the blade. A fixed blade of a shear crusher , wherein the fixed blade is formed and a cutting edge of the fixed blade is equal to or shorter than a cutting edge of the rotary blade. The shear trajectory surface is formed after the cutting edge of the rotary blade when the tip height of the cutting edge at the top of the rotary blade is the same as the end height of the cutting edge of the fixed blade. The fixed blade of the shear crusher according to claim 1 , wherein the width of the blade root locus is set so that the height of the edge is the same as the height of the starting edge of the cutting edge in the blade edge locus of the fixed blade. .

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