JP2798642B2 - Roll crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of directly crushing large lumps of concrete such as concrete mass by a pair of rollers having a relatively small outer diameter or by improving the durability of crushed teeth. A roll crusher that maintains the uniformity of the particle size of the crushed material over a long period of time, and furthermore, a four-axis roll that can consistently crush primary crushed large waste into fine particles of a size that can be reused as aggregate resources. It relates to a crusher.

[0002]

2. Description of the Related Art In the civil engineering and construction industry, in addition to concrete lumps generated by demolition of concrete buildings, asphalt lumps generated by demolition of roads and the like, fragments of blocks, tiles, bricks, tiles, ceramics, and the like, and steel slag of steelworks. Lumps are called "gala". Gala crushed by a primary crusher at a demolition site is usually about 30 cm in diameter from a fist size, so if it is to be reused as aggregate resources, it should be about 4 cm or less in size. It needs to be crushed into fine granules.

[0003] On the other hand, the conventional roll crusher is suitable for making the particle size of the crushed material uniform, but is not suitable for crushing large structural waste. When crushing large-sized loose pieces with this type of roll crusher, it is necessary to use a roll crusher having a large roller diameter and a large roller interval in accordance with the size of the loose pieces to be crushed. Cannot be efficiently cut between the rollers. That is, it is generally known that when a large sized lash is thrown into the roll crusher of the small-diameter roller, the lash is not bitten between the rollers, causing slipping or an arch phenomenon on both rollers, and the crusher cannot be crushed. ing.

[0004] In order to directly crush large sized wastes coming out of the demolition site of a building with a conventional roll crusher, use a large roll crusher in which both rollers have a remarkably large diameter, or use a normal roll crusher. It is necessary to widen the gap between both rollers extremely to encourage biting. A roll crusher having a remarkably large roller diameter has a problem that the size and weight are increased, the manufacturing cost is increased, and versatility is lacking. On the other hand, in a normal roll crusher, if the distance between the two rollers is too large, the crushed material cannot be refined, and it is difficult to keep the crushed particle size constant. Then, of course, the cost increases.

[0005]

In the prior art, when large sized wastes are directly crushed by a crusher, they are processed in two stages. In the first stage, a jaw crusher suitable for crushing large sized wastes is provided. , And then, in the second stage, fine division using a roll crusher suitable for keeping the particle size more uniform. In this case, since the upper and lower two crushers are independent crushers, the apparatus becomes large as a whole, and the equipment cost is high, and the installation and moving and moving are troublesome.

[0006] Moreover, the first-stage jaw crusher is:
Due to structural limitations, the particle size after the crushing process is not uniform, and long wastes are likely to remain in the crushed material. If this is relayed to the second-stage roll crusher as it is, the gap between the crusher rollers They do not bite and tend to cause the same arch phenomenon as described above. If this arch phenomenon occurs, the crushing operation must be stopped, and the long lashes that cause clogging must be removed, resulting in a loss of operation time.

Further, the roll crusher used in the second stage has a feature that the particle size of the crushed material can be kept uniform, but the crushed particle size gradually becomes coarse as the wear of the crushed teeth progresses. In the conventional roll crusher, the wear of the crushed teeth progresses relatively quickly, and replacement and adjustment of the crushed teeth requires much cost and time.

The present invention has been proposed in order to improve the above-mentioned problem relating to a mechanism for crushing waste such as waste concrete to a particle size that can be used as recycled aggregate. It is an object of the present invention to provide a roll crusher that can reliably and efficiently perform a crushing process even if it is charged as it is. Another object of the present invention is to provide a roll crusher in which a super-hard tip for preventing abrasion is attached to a crushing tooth so that the crushed material has a stable particle size over a long period of time. Another object of the present invention is to provide a four-shaft roll crusher which can achieve medium-size or small-size to fine-size splitting with a single unit and is easy to transport and install.

[0009]

In order to achieve the above-mentioned object, a roll crusher according to the present invention comprises a pair of crushing rollers 1, 1 or 2, arranged at a predetermined interval as shown in FIG. And are horizontally opposed to each other, and both rollers rotate inward with respect to each other. FIG. 1 exemplifies a four-axis roll crusher A having a two-stage configuration in the upper and lower stages for convenience, and an actual two-axis roll crusher includes a pair of crush rollers 1, 1 or 2 in FIG.
2 is used alone.

In the first roll crusher of the present invention, as shown in FIG. 2 and FIG.
Is a long tooth 24 having a sharp tip, which is a relatively large tip circle P1.
Are arranged at substantially equal intervals along the circumferential direction, and the row portions, which are the long teeth disks 21 arranged at substantially equal intervals, and the short teeth 27, which are relatively small tip circles P2, are arranged at substantially equal intervals along the circumferential direction. The short teeth disk 22 and the row portion are alternately arranged in the axial direction. In the present specification, the long tooth portion and the short tooth portion of the roller 1 and the crushing tooth portion of the roller 2 are not limited to a mode in which the roller is configured by a combination of a large number of disks as illustrated. And a mode in which a large number of annular tooth rows are engraved in parallel on the peripheral surface of the integrated roller. Hereinafter, only a mode in which a large number of discs are combined will be described.

As is apparent from FIG.
In 1, one long tooth disk 21 faces the other short tooth disk 22. In the long tooth disk 21, the base 25 of each long tooth 24 bulges radially outward, and its tip 29 is inclined forward so as to protrude forward from the rotation side surface 28 of the base. .

According to the above-described configuration, the large rattle that has reached both rollers 1 and 1 has the long teeth 24 of the adjacent disks 21 and 21 of one roller and the disk 21 that is located almost in the middle of the other roller. Is fitted in the valley with the long tooth 24 of the first embodiment, and is received as if embraced here. In this state, the opposing long teeth 24, 24, and 24 advance in the direction in which the distance between the tooth tips 29 decreases with the rotation of the rollers 1, 1, so that the held tooth is removed from the tooth tips 29 of the long teeth 24. , And the tip 29 of each long tooth bites into the rag to generate a crack, which is forcibly pushed between the rollers 1 and 1 while being crushed.

In order to more surely generate cracks in the pieces held by the three long teeth 24 and crush them into small pieces, in the long tooth disc 21, the long teeth 24, 2 are used.
It is preferable to arrange the short teeth 26 of the chevron side in the middle of the circumferential direction of No. 4. In this case, the tip circle of the intermediate short tooth 26 is set to be substantially the same as the tip circle P2 of the adjacent short tooth disk 22. Further, in the long tooth disk 21, the forward inclination angle of the tooth tip 29 of the long tooth 24 is set in a range from the same angle as the tangent to the root circle to an angle outward by about 50 degrees with respect to the tangent. It is preferable.

Adjacent disks 21, 2 on roller 1
The phases of the long teeth 24 may be matched with each other as shown in FIG. 2 or may be shifted back and forth within a range of less than about half a pitch in the circumferential direction without matching the phases. In this case, the force acting on the rattle held by the three long teeth 24 sequentially concentrates on the tip 29 of one of the long teeth 24, so that a greater bite crushing force acts on the rattle. It can be crushed efficiently. Since the cross section of the drive shaft 13 of the roller is, for example, hexagonal, as described later, the phase of each long tooth 24 of one roller 1 is adjusted by a method of slightly displacing the roller chain when assembling the roller. It may be designed slightly shifted from the other.

In the second roll crusher of the present invention, as shown in FIGS. 3 and 5, the pair of crushing rollers 2 and 2 crush teeth 33 having a relatively small tip circle P3 in the circumferential direction. Crushed tooth disks 31 arranged at substantially equal intervals along the axis are arranged at appropriate intervals in the axial direction, and for this purpose, sleeve spacers 32 are arranged between the disks 31, 31. As is apparent from FIG. 3, one of the crushing tooth disks 31 faces the gap between the other crushing tooth disks, ie, the spacer 32, between the two rollers 2, 2. In the crushed tooth disk 31, each crushed tooth is provided with a notch 45 (FIG. 6) on the side of the tooth tip facing the rotation direction of the roller, and a rectangular chip 46 made of a super-hard material is fitted into the notch. The tip is fixed so as to form the tip side surface. Generally, the base material of the disk tip is a wear-resistant high-tensile steel, and the super-hard tip 46 is made of, for example, a tungsten-based alloy.

In the above configuration, the crushing rollers 2, 2
Is substantially the same as the conventional roll crusher for the subdivision of crushing, in which the lashes introduced between the rollers 2 and 2 are bitten, and the crushing is reliably and efficiently subdivided to a predetermined particle size or less. Discharge as aggregate. At the time of this subdivision, in the crushing teeth 33, the tip of the crushing tooth and the side of the tip of the crushing tooth facing in the rotation direction participate in the main crushing,
This part is severely worn. For this reason, as shown in FIG. 6, when a notch 45 having a rectangular side face is provided on the side face of the tooth tip facing the rotation direction of the tooth tip, and an ultra-hard tip 46 having substantially the same width as the crushed tooth is fixed thereto. This portion is less likely to be worn, the durability of the crushed teeth is significantly improved, and the particle size of the crushed particles can be kept constant over a long period of time.

As shown in FIG. 5, the crushed tooth disk 31 is provided with a cut 34 at each tooth tip in the axial direction of the roller or slightly rearward thereof, and the cut has substantially the same width as the crush tooth 33. May be fitted and fixed. Since the tip 35 is fixed so that the head constitutes the tip of the tooth tip, the tip of the tip directly receives the crushing force when the head is crushed. Therefore, chip 3
5 prevents the wear of the tooth base material of the crushed teeth 33 from remarkably progressing, improves the durability of the crushed teeth, and maintains the sharpened tip without abrasion even when the base material is worn to some extent. And the crushing effect can be maintained for a long time.

5 and 6, the crushing teeth 33 or 43 in the crushing tooth disks 31 and 41 may have a trapezoidal shape or a trapezoidal shape with a forward inclination, instead of the side surface as shown in the figure. In the fractured tooth of the trapezoidal side surface, if the same notch or notch as described above is provided at the corner of the side surface facing in the rotation direction, and a super hard tip is fitted and brazed, almost the same effect can be obtained It is.

A four-axis roll crusher A having a two-stage configuration shown in FIG. 1 constitutes a main part of a stationary crusher shown in FIG. 7 and FIG. In the four-axis roll crusher A, the lashes having a diameter of about 30 cm are crushed and crushed by the upper rollers 1, 1 and crushed to a size smaller than a fist size, sent to the lower rollers 2, 2 and then to the roller. Approx. 4c for 2,2
Subdivide to less than m. The crushing apparatus of FIGS. 7 and 8 is installed at the demolition site of a building and has a diameter of 30c which is first crushed by a small crusher (not shown).
Approximately m pieces are consistently crushed to fine particles of about 4 cm or less. In this crushing apparatus, the waste put into the hopper 12 is made into fine particles having a uniform particle size, and then the fine particles are discharged and dropped onto the conveyor 52, and further discharged from the tip of the conveyor 52.

The four-axis roll crusher A shown in FIG. 1 can be mounted on a crawler or a self-propelled trolley driven by wheels. In this case, the work place can be freely moved by freely moving within the work site. Can be changed. In FIG. 9, the four-axis roll crusher A is mounted on the crawler bogie 61. However, the self-propelled bogie may be mounted with a one-stage, two-axis roll crusher that is the upper or lower tier of the roll crusher A. The self-propelled trolley is not limited to a crawler, and may be a wheel-driven trolley.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 illustrates a four-shaft roll crusher A having a two-stage upper and lower configuration. In this configuration, two roll crushers are combined vertically. In crusher A,
A pair of crushing rollers 1, 1 and 2, 2 are distributed in crushing chambers 9 and 11 each having a rectangular plane, and all four axes are driven by a single driving device 3 via an idler 7 by a roller chain 8. is there.

An upper stage of the roll crusher A is a crushing chamber 9 having a rectangular cylindrical shape, and a lower portion of the crushing chamber becomes a guide portion 10 narrowed in a funnel shape as shown in the drawing, leading to a smaller crushing chamber 11. . At the upper end opening of the crushing chamber 9, a funnel-shaped hopper 12 for charging waste and the like is attached. In the crushing chamber 9, a pair of crushing rollers 1 and 1 are horizontally arranged at a predetermined interval, and both rollers are rotatably supported by bearings 14 and 14 installed on front and rear walls of the crushing chamber 9. The chain sprocket 5 is fixed to the rear shaft end of the drive shaft 13 of each crushing roller 1. Each crushing roller 1 has a structure in which long tooth disks 21 and short tooth disks 22 are alternately mounted.

The lower stage of the roll crusher A is a rectangular cylindrical crushing chamber 11, in which a pair of crushing rollers 2 and 2 are horizontally arranged at a predetermined interval, and both rollers are connected. It is rotatably supported by bearings 16 and 16 installed on the front and rear walls of the crushing chamber 11. A chain sprocket 6 is fixed to the rear shaft end of each drive shaft 15 of each crushing roller 2. Each crushing roller 2 has a structure in which crushing tooth disks 31 in which crushing teeth 33 having a mountain-like side surface are arranged at substantially equal intervals along the circumferential direction are arranged at appropriate intervals.

As shown on the right side of FIG.
In the driving machine room 18 adjacent to 1, the driving machine 3 is installed on the gantry 17, and the chain sprocket 4 is mounted on the shaft end of the driving machine.
Is fixed. The roller chain 8 is wound around the sprockets 6 and 6 and 5 and 5 at the shaft end of the crushing roller in a cross direction from the sprocket 4 through an idler 7 installed below the mount 17 as shown by a chain line in FIG. Thus, the upper and lower opposed rollers are determined to rotate inward each other. The roller chain 8 and the sprockets 6, 6 and 5, 5 are protected by being housed in a chain guard 19 attached to the rear wall of the crushing chambers 9, 11.

As shown in FIGS. 2 and 4, the crushing rollers 1 and 1 at the upper stage have long teeth (long crushing teeth) whose tooth tips 29 protrude forward in the rotation direction from the end surface 28 of the base 25. ) 24 are arranged at substantially equal intervals in the circumferential direction, and long teeth disks 21 and short teeth (short crushing teeth) 27 projecting outward in the shape of a mountain are formed at substantially equal intervals in the circumferential direction. And a short tooth disk 22 to be disposed. The disks 21 and 22 each having a hexagonal center hole are alternately fitted to the drive shaft 13 having a hexagonal cross section between the wall surfaces, with a sleeve spacer 23 also having a hexagonal center hole interposed therebetween. Axis 1
3 and rotate together.

The tip circle P 1 of each long tooth 24 is larger in diameter than the tip circle P 2 of the short tooth disk 22, and the tip 29 of each long tooth 24 is the tip circle of the short tooth 27. Projects more than P2. The forward inclination angle of the tip 29 of each long tooth 24 is about 5 ° from the same angle as the tangent to the root circle.
Set the range up to 0 degrees outward angle. In the long tooth disk 21, the short teeth 26 of the chevron shape are arranged in the middle of the long teeth 24, 24 in the circumferential direction, and the tip circle of the short tooth is adjacent to the short tooth disk 22. Is substantially the same as the tip circle P2. The outer diameter of the spacer 23 is determined to be equal to or smaller than the base trough diameter of the short teeth 27.

When viewed from a horizontal plane as shown in FIG. 2, one of the long tooth disks 21 is associated with the pair of crushing rollers 1 and 1.
Face the other short tooth disk 22. The long tooth disk 21 of one roller is disposed so as to enter between the long tooth disks 21 and 21 of the other roller.

In the crushing rollers 1 and 1, for example, a diameter 30
cm, a large tooth of about 24 cm is inserted, and the large tooth of the adjacent disk 21, 21 of one roller is removed.
And the other roller is fitted into the valley between the long teeth 24 of the disk 21 located substantially in the middle of the disk 21 and received by being embraced here. Opposite long teeth 24
As the rollers 1 and 1 rotate, the gap between the tips 29 narrows, so that the held teeth are restrained and held by the tips 29 of the long teeth, and the tips 29 bite into the teeth and crack. And forcibly press it between the rollers 1 and 1 while crushing it.

The short teeth disk 22 is opposed to the long teeth disk 21 of the other roll, so that the long teeth 24
In addition to effectively cutting and breaking the pieces held by the tooth tip 29, the pieces are broken into small pieces by the short teeth 27 facing the long teeth 24 and reliably pushed between the rollers to be discharged downward. The size of the crushed particles due to this crushing action is determined by the size of the pocket-like void generated by the valley between the front pitches of the opposing long teeth 24, 24, and therefore the circumference of the long teeth 24, 24 If the short teeth 26 on the chevron side are arranged in the middle of the direction, smaller crushed particles can be obtained. The size of the crushed particles is also determined by the size passing through the side gap between the discs 21 and 22 that have entered, and the maximum particle size of the crushed material can be adjusted by appropriately setting the interval between the rollers 1 and 1. .

As shown in FIGS. 3 and 5, in the crushing rollers 2 and 2 at the lower stage, the crushing tooth disk 31 in which crushing teeth 33 having a mountain-like side surface are arranged in a sawtooth shape at substantially equal intervals along the circumferential direction. And the small-diameter sleeve spacer 32 are alternately fitted to the drive shaft 15, and an intermediate portion of the drive shaft, that is, a portion between wall surfaces has a hexagonal cross section. The center hole 36 of the disk 31 and the sleeve spacer 32 is a hexagon that matches the cross section of the drive shaft 15, and is configured to rotate integrally with the drive shaft 15 when mounted on the drive shaft 15. I have.

The outer diameter of the spacer 32 is determined to be equal to or smaller than the root of the crushing teeth 33 of the disk 31. When viewed from a horizontal plane as shown in FIG. 3, one crushing tooth disk 31 faces the other spacer 32 in the pair of crushing rollers 2 and 2, and the disks 31 are arranged so as to enter each other.

In the crushing tooth disk 31 shown in FIG. 5, the crushing teeth 33 formed in a saw blade shape along the circumference thereof have a mountain shape whose side shape is slightly inclined forward in the rotation direction, and has a top portion. A notch 34 is formed over the entire tooth width in the axial direction of the roller or slightly behind it. A chip 35 made of a carbide material having substantially the same width as the crushing teeth 33 is fitted into the cut 34, and the head of the chip is attached so as to be seen from the top of the crushing teeth 33 and fixed by brazing or the like.

When the crushed material is crushed, the crushed tooth disk 31 abuts against the crushed material at the top of the cemented carbide tip 35 and crushes the crushed material, thereby protecting the tooth tip base material of the crushed teeth 33 from abrasion. Therefore, the tip 35 enhances the durability of the crushed tooth disk 31, prevents the tooth height from being reduced early due to wear, and keeps the particle size of the crushed material constant for a long time.

In the modification shown in FIG. 6, the crushed teeth 4 formed in a saw blade shape along the circumference of the crushed tooth disk 41 are formed.
3, a notch 45 is formed over the entire tooth width on a tooth tip side surface 44 facing the rotation direction of the tooth tip of each crushing tooth 43, and has a mountain shape whose side shape is slightly inclined forward in the rotation direction. I do. A chip 46 made of a cemented carbide material having substantially the same width as the crushing teeth 43 is attached to the notch 45 and fixed by brazing or the like.

When the crushed tooth disk 41 is divided into small pieces, the front surface and the top of the super-hard tip 46 abut on the crushed material to crush the crushed material, and the tip faces the rotation direction of the crushed tooth 43. The cover 44 covers a wide area and protects the base material of the tip of the crushed tooth 43 from wear. Therefore, chip 46
Improves the durability of the crushed tooth disk 43 and prevents the tooth length and tooth shape from being changed early due to wear, and the tip 3
Even more effectively than 5, keep the size of the crushed material constant over a long period of time.

In the stationary roll crusher shown in FIGS. 7 and 8, a funnel-shaped hopper 12 for charging crushed material is attached to the upper end opening of the upper crushing chamber 9, and the lower crushing chamber 11 is provided.
A chute 50 for guiding crushed material is installed at the lower end opening of the
Further, a carry-out conveyor 52 is disposed below the conveyor. In the stationary type roll crusher, a crushed material 70 such as a large waste put into the hopper 12 is divided into small pieces by the upper crushing rollers 1 and 1, and the crushed material 71 is divided into lower crushing rollers. 2, and crushed into fine particles by the rollers 2, 2. The finely crushed material 72 is guided by the chute 50, dropped on the center of the fender 51 near the base end of the conveyor 52, conveyed by the conveyor 52, and discharged from the tip of the conveyor.

FIG. 9 shows an example in which the four-axis roll crusher A is mounted on a crawler truck 61, and a pay-out conveyor 69 is mounted below the truck. In FIG. 9, a four-axis roll crusher A is installed on an upper frame 62 of a crawler truck 61, and a cab 67 and a magnetic separator 6 are provided in front of the crusher.
8 while the engine room 6 behind the crusher
3 is installed. The paying-out conveyor 69 is housed in the lower part of the crawler cart 61 so as to be able to be raised and lowered. With regard to the conveyor 69, FIG.
Reference numeral 9 'denotes a state in which the conveyor 69 is tilted horizontally, and reference numeral 69''denotes a state in which the conveyor 69 is stored rearward.

In the engine room 63, an engine-driven hydraulic pump unit 64 and a control panel 65 are housed, and hydraulic oil delivered from the hydraulic pump unit 64 is supplied to a traveling drive motor (not shown) of the crawler truck 61 and a roll. The power is supplied to a hydraulic motor (not shown) for the driving device 3 (FIG. 1) of the crusher A. The cab 67 is supported by the frame 62 and the crushing chamber 9 and is mounted above and in front of the crusher A. In the cab, the four-axis roll crusher A, the crawler truck 61, the engine, the magnetic separator 68, the conveyor All 69 operation controls are possible.

In the self-propelled roll crusher shown in FIG. 9, the crushing process of the four-axis roll crusher A is the same as described above, and the crusher A can be moved by the crawler truck 61. Since this roll crushing device has a compact structure and a low height, it can be mounted on a trailer or the like and transported on public roads. This roll crusher can be easily transported, set up and moved in the yard, and is not only excellent in mobility, but also it is not necessary to work by relaying two devices with a relay conveyor as in the past. Since large garbage can be consistently processed up to subdivision, equipment costs and maintenance costs can be greatly reduced as a whole apparatus.

[0040]

According to the roll crusher of the present invention, a pair of crushing rollers can form the tip circle of a long tooth in a long tooth disk to be sufficiently large, and the tip of a long tooth can be made adjacent to a short tooth. Since the tooth disk is made to protrude more than the tip circle, the tip of the tooth bites into a large sized piece and acts to crush the piece and push it between the rollers.
In addition, since the long teeth agitate the looseness by rotating both rollers, the short teeth then bite into the looseness pushed between the two rollers and are broken into small pieces. Therefore, in this roll crusher, even if the body diameters of both rollers are designed to be relatively small, it is possible to crush even if a large sized crush that is crushed by the small crusher is directly supplied. .

The roll crusher of the present invention prevents wear of the crushed teeth and improves the durability of the crushed tooth disk by attaching a tip made of a super-hard material to the tooth tip. This roll crusher can maintain the uniformity of the particle size of the crushed material, which is the original characteristic of the roll crusher, for a long period of time, and easily crushes uniform fine particles of about 4 cm or less, which can be reused as aggregate resources. it can.

The four-shaft roll crusher of the present invention is capable of reducing the size of large-sized rags, which has been difficult in the past, by installing crushing rollers having different shapes in the upper and lower stages.
Can be performed consistently on one machine. For this reason, compared to the conventional method of combining a jaw crusher and a roll crusher to reduce the size of a large lash, the four-axis roll crusher has a lower machine manufacturing cost, and can be transported and moved by reducing the size. Not only can it be easily installed, but also noise during crushing can be reduced.

Further, the four-axis roll crusher of the present invention has a structure in which the crushing sections are arranged in two upper and lower stages and integrated, but the overall height is reduced by configuring the upper and lower two stages with a roll crusher. It can be mounted on a trailer with the same structure and transported by road. Therefore, in this roll crushing apparatus, ancillary equipment such as a conveyor for relaying between crushers is not required, and installation at a work site is not troublesome. Further, when the roll crusher is mounted on a self-propelled bogie, the mobility is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a partial side sectional view showing an example of a four-axis roll crusher of the present invention.

FIG. 2 is a horizontal sectional view of the roll crusher of the present invention, taken along line YY of FIG. 1;

FIG. 3 is a horizontal sectional view taken along the line ZZ of FIG. 1 which constitutes another roll crusher of the present invention.

FIG. 4 shows a long tooth disk used in the present invention,
It is an expanded side view shown along an X-ray.

FIG. 5 shows a short tooth disk used in the present invention,
It is an expanded side view shown along an X-ray.

FIG. 6 is an enlarged side view showing a modified example of the short tooth disk.

FIG. 7 is a partial front view showing an operating state of the stationary roll crusher with a part cut away.

FIG. 8 is a partial side view of the roll crusher of FIG. 7;

FIG. 9 is a partial side sectional view showing an example of a self-propelled roll crusher.

[Explanation of symbols]

 A 4-axis roll crusher 1, 2 Crush roller 13, 15 Drive shaft 21 Long tooth disk 22 Short tooth disk 24 Long tooth 27 Short tooth 31 Crushed tooth disk 33 Crushed tooth 35, 46 Super hard tip

Claims (8)

(57) [Claims] 1. In a roll crusher in which a pair of crushing rollers are horizontally opposed to each other at a predetermined interval and both rollers rotate inward each other, the pair of crushing rollers has a relatively large tip circle. Long tooth rows where sharp long teeth are arranged at substantially equal intervals along the circumferential direction, and short teeth where relatively small short teeth with a tip circle are arranged at almost equal intervals along the circumferential direction. Along with the configuration in which the dimensional teeth are alternately arranged in the axial direction,
In both rollers, one long tooth row faces the other short tooth row. In the long tooth row, the base of each long tooth bulges outward in the radial direction, and the tooth tip is the base. The roll crusher is inclined forward so that it protrudes forward from the side in the rotation direction. 2. The roll crusher according to claim 1, wherein, in the long tooth row portion, short teeth whose tip circle is smaller than that of the long teeth are arranged between the long teeth in the circumferential direction. 3. In the long tooth row portion, the forward inclination angle of the tooth tip of the long tooth ranges from the same angle as a tangent line in the root circle to an angle outward by about 50 degrees with respect to the tangent line. The roll crusher according to claim 1, wherein the roll crusher is set. 4. In a roll crusher in which a pair of crushing rollers are horizontally opposed to each other at a predetermined interval and both rollers rotate inward each other, the pair of crushing rollers has a relatively small tip circle. The crushing teeth row portion in which the crushing teeth are arranged at substantially equal intervals along the circumferential direction is arranged at an appropriate interval in the axial direction, and one crushing tooth row portion of the two rollers is replaced with the other crushing tooth row. In the crushing teeth row portion, a notch is provided on the side of the tooth tip facing the roller rotation direction, and a rectangular chip made of a super hard material is fitted into the notch. A roll crusher for fixing the tip so as to form a tooth tip side surface. 5. A roll crusher in which a pair of crushing rollers are horizontally opposed at a predetermined interval and both rollers rotate inward each other, the pair of crushing rollers has a relatively small tip circle. The crushing teeth row portion in which the crushing teeth are arranged at substantially equal intervals along the circumferential direction is arranged at an appropriate interval in the axial direction, and one crushing tooth row portion of the two rollers is replaced with the other crushing tooth row. In the crushed tooth row, a cut is made in each tooth tip in the direction of the axis of the roller, and a chip made of a super-hard material is fitted into the cut, and the tip of the tip is A roll crusher that sticks to form the tip of the part. 6. In a roll crusher in which a pair of crushing rollers are arranged in two upper and lower stages, a pair of crushing rollers in an upper stage form a long tooth having a relatively large addendum circle along a circumferential direction. Long tooth disks arranged at substantially equal intervals and short tooth disks having relatively small tip teeth arranged at substantially equal intervals along the circumferential direction are alternately arranged in the axial direction. In addition, one long tooth disk faces the other short tooth disk in both rollers, while a pair of crushing rollers in the lower stage apply crushing teeth having a relatively small tip circle in the circumferential direction. Along with the crushed tooth disks arranged at approximately equal intervals along the axial direction at appropriate intervals,
A four-axis roll crusher in which one crushing tooth disk faces a gap between the other crushing tooth disks at both rollers. 7. A stationary type hopper for feeding waste, which is installed above the four-shaft roll crusher according to claim 6, and a pay-out conveyor is mounted below the crusher, and which is installed at a demolition site of a building. Roll crusher. 8. A self-propelled roll crusher in which the four-axis roll crusher according to claim 6 is mounted on a crawler trolley having a pay-out conveyor stored in a lower central part of the vehicle body or mounted on a vehicle body of a wheel driven trolley. apparatus.