JPH116309A - Crusher with rotating crushing teeth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively split a crushed piece by forming and installing a split portion having rotary crushing teeth in a concrete crusher having a movable jaw. A rotating shaft (14) is provided at the base of a fixed jaw (3), and one or more rotary crushing teeth (1) are provided on the rotating shaft (14).
3 is fixed. The fixed tooth 16 is provided at the base of the rotary crushing tooth 4 at a position facing the installation position of the rotary crushing tooth 13, so that the small split portion 12 is formed in the crusher base. In crushing the large pieces, first, the opening between the movable jaw 4 is set to a predetermined value to set the clearance between the rotary crushing teeth 13 and the fixed teeth 16 to a predetermined value. To rotate. Due to this rotation, the large pieces are crushed into small pieces having a predetermined particle size due to the relative rotational displacement between the rotary crushing teeth 13 and the fixed teeth 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher attached to a construction machine typified by a power shovel and crushing an object by opening and closing a jaw. Relates to a crusher having a split mechanism operated by another driving device.

[0002]

2. Description of the Related Art A method of sequentially crushing and dismantling concrete structures, such as the dismantling of a reinforced concrete building, using a jaw-opening and closing crusher attached as one of attachments of a power shovel, is a method of crushing and dismantling. It is frequently used recently because of low noise generation. As one of such jaw opening / closing type crushers, one is a fixed jaw connected to an arm of a power shovel, and the other is a movable jaw that opens and closes the fixed jaw. There is.

[0003] The crusher having the movable jaw crushes and disassemble the object in order to directly bite the object to be crushed such as a concrete wall by opening and closing operation of the movable jaw. In this case, the crushed concrete pieces are conveyed to a dedicated crusher configured as a stationary type device and crushed, that is, divided into small pieces having a predetermined particle size. As described above, in many cases, the direct crushing (large division) by the crusher and the small division are conventionally performed by different devices in many cases.

[0004]

As described above, it is uneconomical to construct a crusher for directly crushing an object and a splitter as separate devices. A crusher with a subdivision function has been proposed so that subdivision is possible. This crusher bites the crushing target and crushes and removes the crushing target from the crushing target, that is, the tip portions of the upper and lower jaws corresponding to the front teeth of a human jaw, and connected to the tip portion. It consists of wedge-shaped teeth implanted in the movable jaw, or small splits consisting of tongue-like projections.

[0005] In the crushing machine having the above-mentioned small splitting function, the object is first divided into a large part in the process of closing the movable jaw toward the fixed jaw, and then the crushed pieces that are largely divided by further closing the movable jaw become small. Will be split. Here, since the opening degree of the movable jaw and the fixed jaw is small at the subdivision stage, the crushing surfaces of the fixed jaw and the movable jaw are located substantially in parallel, and by bringing the parallel crushing surfaces close to each other, Subdivision is performed. In other words, in the subdivision stage, the crushed pieces are crushed so as to be crushed, so that very large driving energy is applied to the movable jaw to crush the pieces widely dispersed in the space between the movable jaw and the fixed jaw. Is required.
In addition, due to such a crushing operation, a part of the crushed pieces is crushed more than necessary and becomes fine particles, and it becomes impossible to reuse the crushed pieces, and extra work is required for collecting the fine particles. There are also problems such as this.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a crushing machine constructed in view of the above-mentioned problems, wherein a crushing means is provided at the base of a movable jaw and a fixed jaw. The splitting means has rotating crushing teeth arranged at least at the base of the fixed jaw among the bases of the fixed jaw and the movable jaw, and in a configuration in which the rotating crushing teeth are arranged only on the fixed jaw side, this rotation means When fixed teeth are provided at the base of the movable jaw facing the mold crushing teeth, and when rotating crushing teeth are also provided on the movable jaw side, the rotating crushing teeth are substantially the same as the rotating crushing teeth on the fixed jaw side. It is configured to be able to obtain small pieces of the desired particle size by adjusting the clearance of each crushing tooth of the small part by adjusting the degree of opening of the movable jaw by being arranged at the opposing position. It is characterized by being a crushing machine.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A crusher for crushing an object by a relative opening / closing operation of a pair of jaws caused by a movable jaw opening / closing operation with respect to a fixed jaw, wherein at least a base of the fixed jaw is provided. Rotary crushing teeth are provided. One or more of the rotary crushing teeth are fixed to a rotating shaft arranged in the width direction of the fixed jaw, and the rotating shaft uses a part of the hydraulic pressure of a driving device, particularly a hydraulic cylinder for opening and closing the movable jaw. Driven by a rotating hydraulic motor.

On the other hand, fixed teeth or rotary crushing teeth having the same configuration as the rotary crushing teeth are provided on the movable jaw base at positions facing the rotary crushing teeth so as to face the rotary crushing teeth. ing. The subdivision work of this device is performed by the following operation. This will be described by taking a case where fixed teeth are implanted on the movable jaw side as an example. Depending on the work procedure, the subdivision work is performed following one large division work, or only the large division work is performed to a certain degree continuously, and the large crushed pieces generated by the continuous large division work are continuously reduced. In some cases, the latter case will be described below. First, a large crushed piece generated by the splitting operation is held by both jaws by opening and closing operation of the movable jaw, and the crushed piece is moved to the base of the both jaws provided with the small splitting means. This movement can be easily performed by turning the entire crusher upward.

When the fragments are located at the bases of both jaws, the movable jaw is set to a preset opening degree, and this state is maintained. As a result, the clearance between the rotary crushing tooth on the fixed jaw side and the fixed tooth on the movable jaw side is determined, and in this state, the driving device for the rotary crushing tooth is operated to determine the relative displacement between the rotary crushing tooth and the fixed tooth. Then, the crushed pieces are crushed into small pieces having a predetermined particle size corresponding to a predetermined clearance. That is, the object to be crushed is crushed by being sheared by the relative rotational displacement between the rotary crushing teeth and the fixed teeth. In the configuration of the present invention, the crushed pieces are not crushed, but are broken by being sheared or cut, so that there is no problem such as pulverization due to crushing as in the related art, and the crushing energy is small. I can do it. Also, by setting the opening of the movable jaw to a desired angle, the clearance between the rotary crushing teeth and the fixed teeth can be freely set, so that it is possible to obtain small pieces of a desired particle size.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. First, the overall configuration of the crusher is shown in FIG. Reference numeral 1 denotes a main body of the crusher. A bracket 2 for connecting to an arm of a power shovel is formed at one end, and a fixed jaw 3 is formed at the other end so as to be integrated with the main body 1. ing. Reference numeral 4 denotes a movable jaw rotatably provided with respect to the fixed jaw 3. The movable jaw 4 rotates around a rotation shaft 6 inserted through the base of the movable jaw 4 by the driving force of a hydraulic cylinder 5. The fixed jaw 3
It is configured to open and close with respect to. That is, the hydraulic cylinder 5 is movable by the expansion and contraction of the cylinder rod 5a by the cylinder body being provided on the crusher body 1 side and the tip of the cylinder rod 5a being connected to the support shaft 11 provided on the movable jaw 4. The jaw 4 is configured to open and close.

Reference numeral 7 denotes a fang member fixed to the tip of the movable jaw 4. At the tip of the fixed jaw 3 facing the fang member 7, the fang member 7 is attached when the movable jaw 4 is closed. A fork portion 8 having a meshing space portion at the insertion position is formed. Reference numeral 9 denotes a conventional small-sized tooth protruding from the engagement surface of the movable jaw 4, and an opening portion (shown in the drawing) formed at a position facing the tooth 9 on the crushing surface of the fixed jaw 3. And shreds a part of the crushed pieces. However, the teeth 9 are not indispensable to the configuration of the present invention, and it is naturally possible to eliminate such a small portion and to use only a small portion described later.

Next, an arrow 12 indicates a small split portion. The small split portion 12 is formed by forming respective members on both the movable jaw 4 side and the fixed jaw 3 side, and the formation position is a crushing portion corresponding to a throat portion if the whole crusher is compared to a human mouth. It is formed deep inside the machine.

The structure of the small part 12 will be described with reference to FIG. FIG. 2 shows a cross section in a state where the movable jaw 4 is in a position close to the fixed jaw 3 (the position indicated by reference numeral 4 'in FIG. 1). Reference numeral 13 denotes a rotary crushing tooth provided at a base of the fixed jaw 3, that is, at a portion where the fixed jaw 3 moves to the main body 1. 1
Reference numeral 4 denotes a rotary shaft provided with the rotary crushing teeth 13, which is pivotally supported by both side walls 3a and 3b of the fixed jaw 3 in the width direction of the fixed jaw 3 as shown in FIG. FIG.
As is apparent from FIG.
Are fixed to the rotating shaft 14.

Reference numeral 15 denotes a hydraulic motor as a drive source for driving the rotary shaft 14 to rotate. The rotary motor 14 is configured to rotate the rotary shaft 14 using a part of the hydraulic pressure supplied to the hydraulic cylinder 5. On the other hand, in the movable jaw 4, a fixed tooth 16 is provided at a position facing the installation portion of the rotary crushing tooth 13.
Is protruding. As shown in FIG. 2, the fixed teeth 16 are displaced from the position where the rotary crushing teeth 13 are arranged in the width direction of the movable jaw 4 (the left-right direction in FIG. 2). That is, the fixed teeth 16 are arranged so as to oppose the arrangement space portions of the rotary crushing teeth 13 which are individually arranged via a certain space in the axial direction of the rotating shaft 14. FIG. 2
As shown in FIG. 5, a clearance W is formed between the rotary crushing teeth 13 and the fixed teeth 16 even when the movable jaw 4 is fully closed. The value of the clearance W can be changed by adjusting the opening of the movable jaw 4 as described later.

Next, the operating state of the crusher according to the present invention will be described. First, when a concrete structure is crushed, a crusher attached to an arm of a power shovel is appropriately operated in accordance with an arrangement state of a ceiling surface, a floor surface, a wall, or the like of the structure. The target object is crushed (divided roughly) so as to bite the target object with the fork portion 8 corresponding thereto. After crushing to a certain extent in this way, the large crushed pieces are subdivided.

In performing the subdivision, as shown in FIG. 5, the movable jaw 4 is widely opened with the opening degree α1, and the fork portion 8 of the fixed jaw 3 is slightly downward, and the crushed pieces CB are picked up by the fixed jaw 3. In this state, the crushed pieces CB scooped with the fork 8 facing upward are moved to the small splitting section 12 side of the crusher 1. Next, the movable jaw 4 is set to a predetermined degree of opening corresponding to the size of the small pieces, and this state is maintained. That is, FIG. 3 shows a state where the opening degree α2 is set relatively large, and FIG. 4 shows a state where the opening degree α3 is set smaller.

Since the clearance W between the rotary crushing teeth 13 and the fixed teeth 16 changes in proportion to the degree of opening of the movable jaw 4, if the degree of opening α is increased, the split pieces are correspondingly increased. CBa
Becomes smaller, and conversely, if the opening degree α is made smaller, the particle size of the small pieces becomes smaller.

Referring mainly to FIG. 3 as an example of the state in which the subdivision is performed, FIG. 3 shows that the opening of the movable jaw 4 is relatively large α
By setting to 2, the rotary crushing teeth 13 and the fixed teeth 16
Is set to a relatively large Wa. The hydraulic motor 15 is operated in this state. By the operation of the hydraulic motor 15, the rotary crushing teeth 13 rotate in the direction of the arrow via the rotary shaft 14, and the crushed pieces CB are compared with each other by the rotation of the rotary crushing teeth 13 and the relative rotational displacement of the fixed teeth 16. It is crushed into very large small pieces CBa.

The crushed small pieces CBa are discharged to the outside of the crusher through an opening 20 formed in a connection portion between the fixed jaw 3 and the main body 1. In addition, opening and closing means such as a shutter is provided for the opening 20 and the subdivision work is repeated to some extent.
It is also possible to adopt a configuration in which a certain amount of the small pieces CBa is discharged at a stretch after being accumulated. FIG. 4 shows a state in which the clearance between the rotary crushing teeth 13 and the fixed teeth 16 is set to a small value Wb by setting the movable jaw 4 to a small opening α3. Thereby, the small pieces C having a smaller particle size than the case of FIG.
Bb can be obtained. In addition, by changing the opening degree α of the movable jaw 4 while the rotary crushing teeth 13 are rotating, it is possible to obtain small pieces having different particle diameters by one small work.

FIG. 6 shows another embodiment. In this embodiment, in addition to the fixed jaw 3, the rotary crushing teeth are installed on the movable jaw 4 side. That is, reference numeral 21 in the figure denotes a rotary crushing tooth provided on the movable jaw 4 side, and is disposed at a base portion of the movable jaw 4 at a position substantially opposed to the rotary crushing tooth 13 provided on the fixed jaw 3 side. Reference numeral 22 denotes a rotating shaft supported by the movable jaw 4, and the rotating shaft 22 is also driven to rotate by a hydraulic motor (not shown) similarly to the rotating shaft 14 on the fixed jaw 3 side. Further, a plurality of rotary crushing teeth 21 are also fixedly provided in the axial direction of the rotary shaft 22, and the arrangement position thereof is as shown in FIG.
Similarly to the fixed teeth 16 shown in FIG. Although the rotary crushing teeth 13 and 21 basically rotate at the same rotation speed, crushing may be performed by intentionally changing the rotation speed. By adjusting the opening degree α of the movable jaw 4 as in the above-described embodiment, the particle size of the small pieces can be easily adjusted.

[0021]

According to the present invention, as specifically described above,
Since the rotary crushing teeth are provided at least to the movable jaw of the movable jaw and the fixed jaw to form the small portion, the crushing target is crushed by the rotary driving of the rotary crushing teeth to the small pieces having a predetermined particle size. Can be effectively crushed.

Further, by setting the degree of opening of the movable jaw to a predetermined size in the small-piece work, small pieces having a desired particle size can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a crusher according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially cutaway side view of the crusher in a state where the opening of the movable jaw is set to a relatively large α2.

FIG. 4 is a partially cutaway side view of the crusher in a state in which the opening of the movable jaw is set to a smaller α3.

FIG. 5 is a partially cutaway side view of the crusher in a state where the opening of the movable jaw is set to almost the maximum α1.

FIG. 6 is a partially cutaway side view of a crusher showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crusher main body 3 Fixed jaw 4 Movable jaw 5 Hydraulic cylinder 6 Rotating shaft 7 Fang member 8 Fork part 12 Small split part 13 Rotary crushing tooth 14 Rotary shaft 15 Hydraulic motor 16 Fixed tooth 21 Rotary crushing tooth 22 Rotating shaft CB Large split pieces CBa, CBb Small split pieces

Claims (6)

[Claims] In a crusher having a fixed jaw and a movable jaw that rotates with respect to the fixed jaw, a splitting means is provided at a base of the fixed jaw and the movable jaw, and the splitting means includes a fixed jaw. A rotary crushing tooth provided at the base of the rotary jaw, and a fixed tooth provided at the base of the movable jaw or a rotary crushing tooth similar to the rotary crushing tooth. Having a crusher. 2. A rotating shaft, which is rotationally driven by a driving means, is provided for the fixed jaw.
The rotating rotary crushing tooth is provided, and one or more fixed teeth are provided on a base of the movable jaw facing the installation position of the rotary crushing tooth. Crusher with mold crushing teeth. 3. A fixed shaft is provided with a rotating shaft which is rotationally driven by a driving means, and the fixed jaw is provided with one rotating shaft.
The above rotary crushing teeth are provided, and also for the base of the movable jaw facing the installation position of the rotary crushing teeth, a rotation axis,
The crushing machine having rotary crushing teeth according to claim 1, wherein the rotary crushing teeth provided on the rotary shaft are provided. 4. The small splitting means provided on the fixed jaw and the movable jaw are configured such that the clearance between them is changed in accordance with the opening of the movable jaw, and it is more desirable to adjust the opening of the movable jaw. The crushing machine having rotary crushing teeth according to any one of claims 1 to 3, characterized in that the crushing machine is configured to be able to obtain small pieces having a particle size of (1). 5. The crusher having rotary crushing teeth according to claim 1, wherein the driving means for the rotary crushing teeth is a hydraulic motor. 6. The small-piece discharge opening formed at the lower part of the small-piece part is provided with an opening / closing means, so that the small-piece can be temporarily stored. A crusher having the rotary crushing tooth according to any one of the above.