JP2007044581A - Two-stem type crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-stem type crusher which enables a recovery of a shearing force at low cost and easily corresponding to an abrasion of a rotary blade accompanied with crushing works. <P>SOLUTION: The two-stem type crusher 1A has a constitution that two rotary shafts 3 and 4 in which a plurality of rotary blades 3a or 4a are continuously arranged axially are provided in reverse and parallelly, blade edge surfaces of the opposed rotary blade 3a and 4a edges are mutually lapped and are rotated by the predetermined engine to shear and crush a sandwiched target. In the crusher, a shearing system is to be a one-sided shearing using only one edge of the rotary blade, at the same time, a shaft position adjusting means 30 carrying out the position adjustment of the axial direction is provided on one shaft-end side of the rotary shaft 3, and the rotary shaft 3 is slid in the axial direction by the operation of the means. The rotation of both rotary shafts 3 and 4 in a state that the blade edge surface of the rotary blade 3a is pressed against the opposed blade edge surface of the rotary blade 4a produces a self-grinding of the edge surfaces. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a twin-screw crusher that crushes wastes and the like by the shearing force of blade members provided on two rotary blades, particularly when the blade part is worn and the shearing force is reduced. The present invention relates to a twin-screw crusher that can be recovered.

  The crusher is used to reduce volume and reuse by crushing industrial waste etc. into sections of a predetermined size or less, and this includes crushing rotary blades of one-shaft type and two-shaft type. Is known. As shown in FIG. 3, the single-shaft crusher shears between a blade portion 40 provided on each of a plurality of rotating plates 4 a provided continuously at a predetermined interval on a single rotating blade 5 and a fixed blade 41 provided on the main body side. The object is crushed by force.

  On the other hand, as shown in FIG. 4, the biaxial crusher is provided horizontally so that the blade tips of a plurality of blade portions 3a and 4a that are connected to the two rotary blades 3 and 4 respectively at predetermined intervals alternately engage with each other. There is known a biaxial crusher 1B that crushes an object with a shearing force between meshing cutting edges. In addition, there are two types of shearing, one using the blades on both sides of the rotating blades 3a and 4a and the other using only the blades on one side. One side shearing method using only

  In such a biaxial crusher, the blade portion gradually wears and the corners forming the blade edge become rounded by using for a predetermined period, and the gap between the meshing blade edges increases and the shearing force gradually decreases. come. This phenomenon is said to be particularly noticeable with the two-side shear type, but when replacing worn blades, both the single-shaft type and the bi-axial type require a lot of work to remove and attach, The cost of obtaining a new rotary blade is likely to be a problem.

  Also, when dealing with the blade edge by polishing the blade edge, it takes time and labor to polish each blade edge in addition to the removal and installation work, and the crushing machine cannot be driven during that work, resulting in reduced work efficiency. In addition, the gap between the cutting edges that mesh with each other is expanded by polishing the cutting edges, and it becomes more difficult to secure a shearing force.

  In order to solve this problem, Japanese Patent Application Laid-Open No. 6-296891 discloses that hydraulic oil is press-fitted to loosen the close contact between the cap and the rotary shaft constituting the rotary blade, and the rotary blade around the rotary shaft can be easily slid. A simplified version of the new and old renewal of rotating blades is presented. However, even in such a technique, the problem of an increase in running cost caused by exchanging the blade portion at every wear has not been solved.

  On the other hand, in JP-A-8-323233 and JP-A-10-137613, the blade member is divided into a blade base portion and a blade edge (blade piece) portion, and only the blade edge portion is detachable. A technique has been proposed in which only the blade edge is replaced to recover the shearing force when worn. This eliminates the trouble of removing the rotating shaft as in the case of exchanging the entire rotary blade, facilitating the work and keeping the running cost relatively low. In addition, there is no concern that the gap between the cutting edges that mesh with each other as in the case of polishing the rotary blade will be enlarged.

However, even in these two techniques, since the number of cutting edge parts to be replaced becomes large, the cost for obtaining a large number of cutting edge parts is required, and therefore the running cost is not sufficiently reduced. In addition, it takes a relatively long time to replace all the blade tips, but the period during which the crusher is stopped is lengthened and the work efficiency of the entire crushing operation is reduced.
JP-A-6-296891 JP-A-8-323233 Japanese Patent Laid-Open No. 10-137613

  The present invention has been made to solve the above-described problems, and it is possible to easily recover the shearing force at a low cost in response to the wear of the blade portion due to the crushing operation of the biaxial crusher. The challenge is to make it.

  Therefore, in order to overcome the above-mentioned problems, the present invention provides two rotary blades in which a plurality of blade portions are arranged in the axial direction in opposite directions and in parallel to each other, and the blade end surfaces of the blade portion end surfaces are overlapped with each other. At the same time, for a biaxial crusher that rotates in opposite directions with predetermined power and shears and crushes the sandwiched object, the shearing method is one-side shearing using only one end face of the blade, and at least one of A shaft position adjusting means is provided on the shaft end side of the rotary blade to adjust the position of the rotary blade in the axial direction. The shaft position adjusting means is operated to slide the rotary shaft in the axial direction. The blade edge was self-polished by rotating both rotary blades while pressing the blade edge surface of the blade edge against the blade edge surface of the opposite blade part.

  With this configuration, when the blade part wears and meshes with each other due to use and a gap is generated between the cutting edges and the shearing force is reduced, the outer peripheral sides of the rotating blades forming the cutting edge surfaces are brought into close contact with each other. And reducing the gap of the cutting edge easily without the trouble of removing the blade part or polishing a large number of cutting edges or the cost of replacing the entire rotating blade or a large number of cutting edge parts, The end surfaces of the blade portions that are in close contact with each other in the pressed state are self-polished by the rotation of the rotation shaft, and the shearing force is easily recovered.

  Further, the shaft position adjusting means is provided in a state that does not hinder the rotation of the rotary blade, and includes a screw-like member having a shaft portion and a screw head, and a main body side member having a screw hole into which the shaft is screwed. By rotating and operating the screw head exposed outside the main body, the rotary blade is slid in the axial direction and fixed at a predetermined position.

  By adopting such a configuration, it is possible to adjust the position of the rotary blade so that the blade portions can be self-polished with a simple procedure without complicating the configuration of the biaxial crusher. it can.

  According to the present invention, the blade portion can be self-polished while continuing the crushing operation in response to the wear of the blade portion due to the crushing operation, and the shearing force can be easily recovered at a low cost.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 and FIG. 2 are partial cross-sectional views of a biaxial crusher 1A showing an embodiment of the present invention. As in the conventional biaxial crusher 1B, each has a substantially disk-shaped blade. The two rotary blades 3 and 4 in which the portions 3a and 4a are alternately fitted are horizontally provided so that the blade edges of the blade portions 3a and 4a are alternately engaged with each other.

  In addition, a screen-like grill (not shown) is disposed below the rotations 3 and 4 of the two rotations, and the crushed material crushed by the blade edges of the blade portions 3a and 4a meshing with each other does not pass through the grill. What is left on the grill surface is rolled up by a hook shape (not shown) protruding on the outer peripheral side of the blade portions 3a, 4a and conveyed above the blade portions 3a, 4a meshing with each other to be crushed again. In addition, a section having a width less than the grill width is obtained.

  The present invention is characterized in that the shaft position adjusting means 30 for adjusting the position in the axial direction is provided at the shaft end of one rotary blade 3. For example, when a drive mechanism such as a motor is provided at one end of the rotary blade 4 (not shown) to serve as a drive shaft, the rotary blade 3 becomes a driven shaft having a power transmission mechanism such as a gear at one end (not shown). The rotary blade 3 provided so as to be slidable within a predetermined range in the axial direction can be adjusted in its axial position by the shaft position adjusting means 30 provided on the shaft end side opposite to the power transmission mechanism. Is.

  The shaft position adjusting means 30 is provided on the main body side and has a bearing structure 310 between the inner periphery of the through-hole 31a and the rotary blade 3 and has an opening side as a screw hole 311. A substantially cylindrical shaft support member 31 that rotatably supports the end side, a shaft portion 32a provided with a screw thread 321 on the outer periphery, and a screw head portion 32b are provided with a through hole 32c in the center. It has a hollow screw shape or bolt shape, is screwed into the screw hole 311 of the shaft support member 31 from the outside, and the thinnest end portion of the rotation shaft 3 is inserted into the through hole 32c so that the rotation shaft 3 cannot slide outward. A screw-like member 32 is provided. Note that a bearing structure 312 is also provided at the contact point with the rotating shaft 3 side pressed by the tightening operation of the screw-like member 32, and this portion does not become a resistance of shaft rotation.

  As shown in FIG. 1, the cutting edge surface of the blade portion 3 a and the cutting edge surface of the blade portion 4 a opposed to the blade portion 4 a are worn and a gap is formed between them, and the shearing force is reduced. And, there is a tightening margin of a width α between the screw-like member 32 into which the thinnest end portion of the rotary shaft 3 is inserted and the shaft support member 31, and a shape in which the tool can be engaged with a hexagonal shape in a side view. By rotating and tightening the screw head 32b that has been set with a predetermined tool, the rotary blade 3 can be slid leftward in the figure and the axial movement can be fixed at that position.

  Then, as shown in FIG. 2, by rotating the screw head 32 b, the blade edge surface formed on the outer peripheral side of the end surface of the blade member 3 a provided on the rotary blade 3 is the surface of the rotary blade 4 facing this. It presses in the state which contact | connected the blade edge | tip surface of the blade member 4a. In this state, the gap between the cutting edges is eliminated and the shearing force is improved. Further, by rotating the rotary blades 3 and 4 with each other while adhering an abrasive or the like to the meshing part, the blade The self-polishing action in which the cutting edge surfaces of the members 3a and 4a are polished together is exerted, and after a predetermined time, the cutting edges adhere to each other without any gap, and the recovery of the shearing force is further improved.

  In this way, the axial position of the rotary blade 3 can be adjusted to adjust the axial position of the rotary blade 3 with a simple procedure of rotating the shaft position adjusting means 30 from the outside without the need to remove the rotary blades 3 and 4. By simply rotating it, self-polishing action can be achieved, and shearing force can be applied easily and reliably without the cost of replacing the blade portions 3a, 4a or the blade edge portion and the trouble of polishing the blade edge. It can be recovered. Furthermore, since the self-polishing action can be exerted during the shearing operation, it is not necessary to stop the drive of the biaxial crusher, and there is no fear of reducing the working efficiency.

  In the above-described embodiment, the case where the shaft position adjusting means is provided on the driven shaft on the side opposite to the side on which the power transmission mechanism is disposed has been described. Alternatively, it can be carried out even if arranged on the drive shaft side. Moreover, although the case where the shaft position adjusting means presses the rotating shaft and presses the rotating blades has been described, it goes without saying that the rotating blade may be pulled to press the rotating blades.

  Furthermore, a plurality of substantially disk-shaped rotating blades connected to the rotating shaft are pushed by a rotating blade fixed in the axial direction as an axially slidable blade or a rotating blade or the like facing each other. It may be configured to be pressed, or an elastic member such as a coil spring may be interposed between the screw-like member of the shaft position adjusting means and the rotating shaft side to elastically press the rotating blades. This is possible, and this makes it easy to cope with variations in the width of the gap between the rotary blades.

The partial cross-sectional view of the biaxial crusher which shows embodiment of this invention. The partial cross-sectional view which shows the state at the time of operating the axial position adjustment means of the biaxial crusher of FIG. The longitudinal cross-sectional view which shows a uniaxial crusher. The longitudinal cross-sectional view which shows the biaxial crusher of a prior art example.

Explanation of symbols

1A Two-shaft crusher, 3, 4 rotary blade, 3a, 4a blade, 30 shaft position adjusting means, 31 shaft support member, 32 screw member, 32a shaft portion, 32b screw head, 311 screw hole

Claims (2)

  Two rotary blades having a plurality of blade portions arranged in an axial direction are arranged in opposite directions and in parallel with each other, and the blade end surfaces of the opposed blade portion end faces are overlapped with each other, and the two rotary blades are In the biaxial crusher that shears and crushes the object sandwiched by rotating with a predetermined power, the shearing method is one-side shear using only one end face of the blade part, and at least one of An axial position adjusting means for adjusting the axial position of the rotary blade is provided on the axial end side of the rotary blade, and the rotary blade is slid in the axial direction by operating the axial position adjusting means. As mentioned above, the cutting edge is self-polished by rotating both rotary blades with the cutting edge surface of the cutting edge portion provided on the rotating blade pressed against the cutting edge surface of the opposing cutting edge portion. Machine. The shaft position adjusting means includes a screw-like member having a shaft portion and a screw head, and a body-side member having a screw hole into which the screw-like member is screwed. The biaxial crusher according to claim 1, wherein the screw head exposed outside the main body is rotated and operated to slide the rotating shaft in the axial direction and fix it at a predetermined position.

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