JP2000301015A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically strip off materials to be crushed even if asphalt is fed by providing a crusher in which an engagement spacing between a pair of crushing blades is set at reproducing size with material to be crushed stripping means, making the stripping means scrapers, and providing the scrapers so that clearances between adjacent crushing blades are filled and the tips thereof come into contact with the side of the rotating shafts. SOLUTION: When right and left crushing blades 11, 12 are subjected to rotary driving clockwise and anticlockwise, respectively and material to be crushed such as concrete is fed from above, materials to be crushed is crushed one by one from the intermediate side of the right and left crushing blades 11, 12 and they fall downward so as to have prescribed grading. At this time, clearance parts of the crushing blades 11, 12 each are provided with scrapers 13 as the material to be crushed stripping means. The scrapers 13 also have a function of a fixed tooth and are, adjustably by shifting, fitted so that they are positioned below the center of the rotating shafts of the crushing blades 11, 12 and their tips 13a almost come into contact with the rotating shaft parts of the crushing blades 11, 12. The shape of the scrapers 13 is formed in a straight line along the outer peripheral locus of the crushing blades 11, 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a crusher suitable for application to, for example, a twin-screw crusher.

[0002]

2. Description of the Related Art Conventionally, the structure of the blade of a twin-screw crusher has been variously changed depending on the nature of the material to be crushed. Generally, in order to crush and regenerate concrete waste, a crusher having a special blade characteristic is used (for example, Japanese Patent Laid-Open No. 10-337).
490).

However, processing of concrete and asphalt having different hardness and viscosity with a single crusher means that if the hardness is as high as concrete, the processing is interrupted by crushing blades of high viscosity such as asphalt. It is not efficient because of poor efficiency.

[0004]

In view of the foregoing, the present invention can effectively treat even raw materials having different hardness and viscosity such as concrete and asphalt,
Another object of the present invention is to propose a crusher having a means for keeping the distance between the crushing object separating means and the shaft constant even when the distance between the two-shaft crushing shafts is changed.

[0005]

According to the present invention, first, there is provided a crushing machine in which a pair of crushing blades provided on two shafts are meshed to form a plurality of rows and a meshing interval is set to a regeneration size. And a peeling means is a scraper, which is a crusher provided so as to fill a gap between adjacent crushing blades so that the tip of the scraper is almost in contact with the rotating shaft side. It is.

The present invention secondly provides a crusher in which a large number of rows of crushing blades provided on two axes are engaged with each other and a meshing interval is set to a regenerating size. Means for peeling the crushed object is a side plate fitted with both side portions fitted to both end shaft portions of the crushing blade, a scraper that has entered a gap between the crushing blades, and each scraper and both side portions. It is a crusher composed of:

Thirdly, the present invention is a crusher in which holes are formed on both sides, each having an inner diameter slightly larger than the outer diameter of the shaft of the crushing blade.

[0010] Fourth, the present invention is a crusher in which the means for peeling the crushed object is prevented from rotating by a stopper provided in the crusher main body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Even when asphalt is caught by a crushing blade and eaten without being peeled off, the asphalt hits a scraper after about half a round and is forcibly peeled off.

When the space between the crushing shafts of the twin-screw crusher is widened or narrowed in accordance with the change in the regeneration size, the crushing object peeling means mounted coaxially with the crushing shaft also moves integrally with the movement of the crushing shaft. Therefore, it is not necessary to adjust the distance between the means and the crushing shaft again, so that the working time is shortened and a specialized engineer is not required.

[0011]

FIG. 1 is a plan view showing the structure of a crushing blade of a crusher according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. In this example, a two-shaft crusher arranged horizontally is shown. The left and right crushing blades 11 and 12 are driven to rotate clockwise and counterclockwise by a driving source, respectively. Then, an object to be crushed such as concrete is thrown in from the upper side, crushed sequentially from the middle side between the crushing blades 11 and 12 on the left and right sides, and falls down to a lower side with a predetermined particle size. A scraper 13 is provided corresponding to a gap between the crushing blades 11 and 12 as means for separating the crushed object. The scraper 13 also has a function of a fixed blade, and is mounted so as to be located below the center of the rotating shafts 11a and 12a and to have the tip 13a almost in contact with the rotating shaft portions of the crushing blades 11 and 12 and to be movable. Have been.

The shape of the scraper 13 is such that the crushing blades 11 and 12
Are formed in a straight line along the locus of the outer circumference of the rotating shaft.
As another example, as shown in FIG. 3, the crushing blades 11 and 12 can be formed into a concave arc shape along the outer peripheral trajectory of the rotating shaft. Usually, the gap between the crushing blades 11 and 12 and the tip of the scraper 13 is preferably about 1 to 5 mm, but differs depending on the actual material to be crushed.

The scraper 13 is fixedly attached to the frame 10, as shown in FIG. Further, by providing the clearance angle α, the degree of peeling of the crushed object, for example, asphalt can be improved.

FIG. 3 is a perspective view showing another example of the scraper 13 as the crushed object peeling means. In this example, the gap between the scraper 13 and the rotating shaft of the crushing blade is prevented from shifting when the interval between the rotating shafts of the crushing blades 11 and 12 is increased or reduced in order to adjust the particle size of the crushed object. Both sides 32 are fitted on the rotating shafts on both sides of the crushing blade, and a scraper portion 13 is provided which is inserted into a gap between the adjacent crushing blades 11 and 12. Holes 31 into which the rotating shafts of the crushing blades are fitted are formed at both ends, and scraper portions 13 are provided at regular intervals in the middle. Scraper unit 13
The tip of the is almost the same as the outer diameter of the rotating shaft, about 1-5mm
A gap of the order is formed. The material is wear-resistant steel.

Therefore, since the both sides 32 are fitted to the rotating shaft, the spacing between the rotating shaft and the scraper portion 13 is kept constant even if the axial spacing between the crushing blades 11 and 12 is adjusted. . A stopper 42 is attached to the frame 41 so that the scraper 13 does not rotate with the rotation of the crushing blade.
Is provided. The frame 41 and the back surface 33 of the scraper 13 are attached at a constant distance so that they do not come into contact with each other even by adjusting the distance between the crushing blades. Since the rear portion 33 projects vertically from other members, the contact with the stopper 42 abuts only on the rear portion 33, so that the other members are not affected.

Table 1 shows the processing time and the processing particle size as a processing result with respect to the input amounts of asphalt glass and concrete glass obtained using an actual crusher.
The gap between the crushing blades is set to 28 to 25 mm, and a 19 mm thick scraper 13 is employed. Therefore, the gap is 3 ~
It becomes about 4.5 mm.

[0017]

[Table 1]

Conventionally, since there was no scraper 13,
When the asphalt glass was treated after the concrete glass was crushed, asphalt glass pieces were eaten on the crushing blades 11 and 12, but in this example, the scraper 13 as shown in FIG. And the number of reversals of the crushing blades 11 and 12 became zero. The particle size obtained when the original set particle size is under 40 mm is asphalt gala of 8
4% and 88% with concrete gala showed good results.

[0019]

As described above, according to the present invention, the crushing object separating means is provided in a crushing machine in which a pair of crushing blades provided on two axes are engaged with each other and a plurality of crushing blades are provided and the engagement interval is set to the regeneration size. The scraping means is a scraper, and the gap between adjacent crushing blades is filled, so that the tip of the scraper is almost in contact with the rotating shaft side. Is automatically peeled off even if is supplied, which has the effect of eliminating or reducing maintenance.

Further, according to the present invention, in a crusher in which a pair of crushing blades provided on two axes are engaged with each other and a plurality of crushing blades are provided and a meshing interval is set to a regenerating size, a crushing blade provided in a gap between adjacent crushing blades. The means for peeling the crushed material includes a side plate fitted to both shaft portions of the crushing blade, a scraper that has entered a gap between the crushing blades, and a back plate unit that integrates each scraper and both side portions. With this configuration, even if the distance between the axes of the crushing blades is adjusted, there is an effect that the gap between the crushing blades and the crushing blades is kept constant.

Further, according to the present invention, since the scraper is formed in a concave arc shape along the outer trajectory of the crushing blade, the gap between the scraper and the crushing blade is kept constant, so that the scraper is separated while passing through the scraper. Promoted.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an example of the present invention.

FIG. 2 is a schematic sectional view showing an example of the present invention.

FIG. 3 is a perspective view showing the structure of a scraper.

[Explanation of symbols]

 10 frame 11,12 crushing blade 13 scraper

Claims (6)

[Claims] 1. A crushing machine in which a pair of crushing blades provided on two axes are engaged with each other and a plurality of crushing blades are provided and a meshing interval is set to a regenerating size. 2. The crusher according to claim 1, wherein the crusher is provided so as to fill a gap between the crushing blades and a tip of the scraper is almost in contact with the rotating shaft. 2. The crusher according to claim 2, wherein the tip of the scraper is formed in a concave arc shape substantially along the outer trajectory of the crushing blade. 3. A crushing machine in which a pair of crushing blades provided on two axes are engaged with each other to form a plurality of rows and a meshing interval is set to a regenerating size, and a crushed object provided in a gap portion between adjacent crushing blades is separated. The means to perform is constituted by both side portions fitted to both end shaft portions of the crushing blade, a scraper that has entered a gap between the respective crushing blades, and a back plate portion that integrates each scraper and both side portions. Crusher characterized by. 4. A crusher according to claim 3, wherein holes are formed on both sides of the crushing blade so that the inner diameter is slightly larger than the outer diameter of the shaft of the crushing blade. 5. The crusher according to claim 3, wherein the means for peeling the crushed object is prevented from rotating by a stopper provided on the crusher main body. 6. A crusher according to claim 5, wherein holes are formed on both sides of the crushing blade so that the inner diameter is slightly larger than the outer diameter of the shaft.