JPS5910280Y2 - Shredder with variable maximum opening width - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a crusher that can change the maximum opening width of both rotary arms depending on the width of the object to be crushed.

A crusher with a pair of rotating arms is mounted on a work cart such as a power shovel to dismantle concrete structures.

In this case, the width of the walls and columns of the concrete structure to be demolished is uneven, and some of them are quite wide.

For this reason, if all the crushing operations are to be performed using as few crushers as possible, it is desirable to design the maximum opening width of both rotary arms in this crusher to be as large as possible.

However, in order to increase the maximum opening width, it is necessary to lengthen the rotary arm, and at the same time, in order to maintain a certain strength of the rotary arm and support plate, the wall thickness must also be increased, and the overall crusher The weight will increase significantly.

On the other hand, there is a certain limit to the weight that can be loaded onto a power shovel, which is a work cart, and even if it could be loaded, it would be inefficient because it would be difficult for a heavy breaking machine to perform small turning operations.

Therefore, at present, several types of crushers with different sizes are used to break down a single concrete structure into a predetermined shape, or they are used in conjunction with other crushing devices such as a play force.

The purpose of this invention is to provide a crusher in which the maximum opening width can be changed by changing the mounting position of at least one rotary arm, in order to improve the above-mentioned problems regarding the crusher.

In order to achieve this purpose, the crusher according to this invention is
In the support plate, at least one of the through holes for inserting the rotating shaft of each rotary arm is further provided with a third through hole juxtaposed, or a long hole is provided with the juxtaposed through holes communicating with each other. .

Next, the embodiment of this invention will be explained based on the drawings.
In the figure, a crusher 2 according to this invention is schematically shown in longitudinal section.

The crusher 2 has two support plates 4 with rectangular planes arranged in parallel in the vertical direction (see Fig. 3), and two rotating arms 6, 6 and a double-acting cylinder 8 are arranged between the support plates. are doing.

Although the rotating arms 6,6 are normally symmetrical, they may be asymmetrical for special applications.

The rotating arm 6 generally has an elongated planar shape, and is partially thin-walled to reduce weight (see FIG. 3).

The tip of the rotary arm 6 is bent inward to form a crushing tooth 10, and both crushing teeth are usually wedge-shaped and facing each other.

In addition, the cylinder case of a double-acting cylinder 8 is pivotally attached to the rear end of one rotary arm 6, and the piston rod of the double-acting cylinder is pivotally attached to the rear end of the other rotary arm 6. Double-acting cylinder 8 between the rear ends of arms 6, 6
Set up.

The double-acting cylinder 8 is, for example, a large hydraulic cylinder with a diameter of 35 cm, and it is preferable to use the hydraulic circuit of a power shovel, which is an operating truck, for driving the double-acting cylinder 8.

Furthermore, the vertical center portion of the rotating arm 6 bulges slightly inward,
A shaft hole 12 is provided in this portion.

As shown in FIG. 3, the rotating shaft 14 of the rotating arm 6 passes through the through hole 16 and the shaft hole 12 of the support plate 4, and the split pin 18 is inserted into a diametrical hole provided at the rear end.

As a result, the rotating shaft 14 is fixed, and each rotating arm 6 is rotatably supported between the support plates 4 .

In the support plate 4, a third through hole 20 is further provided outwardly at a predetermined interval in one of the two through holes 16 into which the rotating shafts 14 are respectively inserted.

Therefore, the support plate 4 is wider than the support plate of a normal crusher.

The third through-hole may be further provided in parallel to the other of the through-holes, or two or more third through-holes may be provided in one of the through-holes.

In this case, the distance between the two through holes 16.16 is determined so that the crushing teeth 10.10 of both rotating arms can approach each other when the double-acting cylinder 8 is extended (see the dashed line in No. 2). .

A stopper 22 is arranged at the lower end of the support plate 4, and the stopper is fixed between the support plates 4, 4.

The stopper 22 prevents the rotating arms 6, 6 from shaking more than necessary when they are opened.

Although not shown, it is preferable to attach cushioning members such as rubber to both end surfaces of the stopper 22 to prevent noise from being generated when the rotary arm 6 comes into contact with the stopper 22.

Further, a disk 24 is fixed perpendicularly to the rear end of the support plate 4, and this disk is fitted with a disk 28 fixed to the lower end of the bracket part 26.

A bolt 30 is inserted into the center of the disk 24, 28, and the bolt is tightened with a nut 32 to rotatably install the support plate 4 with respect to the bracket part 26.

If desired, the support plate 4 may be formed integrally with the bracket portion 26.

The bracket part 26 has a mounting hole 34 for a work trolley. 3
The crusher 2 according to this invention preferably has one mounting hole 36 so that its position can be changed depending on the type and size of the workbench, as illustrated in FIG. 38, however, in addition to a power shovel, a crawler crane, bulldozer, forklift truck, etc. may also be used as the work vehicle.

When dismantling an object to be crushed by the crusher 2, if the width of the object to be crushed is narrower than the maximum opening width between the crushing teeth 10 and 10 of both rotary arms when the double-acting cylinder 8 is retracted (No. 1
(See the solid line in the figure), the crusher 2 is used as it is in the state shown in Figure 1 to disassemble objects to be crushed.

On the other hand, if the width of the object to be crushed 40 is larger than the maximum opening width between the crushing teeth 10, 10, as illustrated in FIG. 4, it is necessary to change the mounting position of one of the rotary arms 6.

In this case, with the crusher 2 standing on the ground, remove the split pin 18 from the rotating shaft 14 of one rotating arm 6,
The rear end surface of the rotating shaft is struck with a hammer and pulled out from the through hole 16.

After shifting the position of this rotating arm, the rotating shaft 1
4 into the third through hole 20 and the shaft hole 12 and fixed again with the split pin 18.

As a result, one rotary arm 6 is in the mounting position shown in FIG. 2, so when the double acting cylinder 8 is retracted, the crushing tooth 10
．． The maximum aperture width between 10 and 10 is considerably larger than in FIG. 1 (see solid line in FIG. 2).

In this state, when the object to be crushed 40 is held between the crushing teeth 10 and 10 of both rotating arms and the double-acting cylinder 8 is extended,
Both rotary arms 6, 6 rotate to the position indicated by the dashed-dotted line in FIG. 2, and partially crush the object 40 as shown in FIG. 4.

Next, when the rotating shaft 14 of one of the rotating arms 6 is returned to the position of the through hole 16, the partially disassembled object 40 can be sandwiched between the rotating arms 6 and 6 and completely crushed, as shown in FIG. I can do it.

FIG. 5 shows this modification, in which the same parts are given the same reference numerals.

In the crusher 42, a long hole 44 is provided in the support plate 4 so that the through holes 16 and 20 shown in FIG. 1 communicate with each other.

The width of the elongated hole 44 is approximately equal to the diameter of the rotating shaft 46, and the rotating shaft is preferably fixed by tightening a nut, and is longer than the rotating shaft 14.

Although there is one elongated hole 44 in FIG. 5, which is straight, two elongated holes may be provided symmetrically, or may be curved or curved in a U-shaped plane.

A shaft fixing plate 48 is attached to the elongated hole 44, and the elongated hole 44 is closed by the fixing plate, leaving a portion where the rotating shaft 46 is inserted.

The shaft fixing plate 48 has two parts on the front and back surfaces of the support plate 4.
The shaft fixing plate 48 is attached by using two screws, for example, by attaching it removably to the support plate 4 using bolts 1-50.50, or by using other fixing means.

The specific shape of the shaft fixing plate 48 is illustrated in FIG.

The shaft fixing plate 48 has a protruding elongated hole insertion portion 52 at its center, and the planar shape of the insertion portion is approximately equal to that of the elongated hole 44, and the height of the insertion portion is approximately the same as the thickness of the support plate 4. equal.

The circumferential wall of the elongated hole insertion portion 52 is inclined upward and slightly inward, and one end wall thereof is recessed into a semi-cylindrical shape, and a surface 54 of the end wall is a contact surface with the rotating shaft 46.

The base 56 of the shaft fixing plate 48 is flat and has a slot 57 of the same width as the insert 52, the surface of which contacts the support plate 4.

A bolt hole 58 is provided in the horizontal center of the base 56 symmetrically about the vertical center line.

In the crusher 42 shown in FIG.
To narrow the distance between the two, first loosen the nut on the rotating shaft 46 and partially pull out the rotating shaft.

In this state, the shaft fixing plate 48 is removed from the support plate 4 by removing the bolt 50.50.

Next, when the double-acting cylinder 8 is appropriately contracted, the rotating shaft 46
slides inwardly along the elongated hole 44 until it contacts the opposite circumferential wall of the elongated hole 44, resulting in a change in the position of one of the rotary arms 6.

After this, the shaft fixing plate 48 is turned left and right and the slot 57
is fitted onto the rotating shaft 46, and the insertion portion 52 is fitted into the elongated hole 44.

After the shaft fixing plate 48 is dried again with a bolt of 50.50, the nut of the rotating shaft 46 is tightened to completely fix the rotating shaft.

In the same manner as described above, it is also easy to widen the maximum opening width between the crushing teeth 10, 10 again.

Use of this crusher 42 is advantageous because the position of the rotating arm 6 can be changed without completely pulling out the rotating shaft 46 from the support plate 4.

FIG. 7 shows a modified example of the shaft fixing plate, in which the shaft fixing plate 60 has an elongated hole insertion portion 62 with a bent plane.

Both end surfaces 64 of the elongated hole insertion portion 62. 66 is a contact surface with the rotating shaft, and a predetermined number of bolt holes 68 are provided.

In a crusher using this shaft fixing plate 60, the support plate is provided with a long hole in a bent plane, and the shaft fixing plate is always inserted from above.

By using the crusher according to this invention, even if the width of the object to be crushed is partially large, it can be crushed by simply changing the mounting position of the rotating arm, so the number of crushers used at the demolition site can be reduced. It is economically advantageous to do so.

In particular, even if the entire concrete structure to be demolished is huge, there is no need to increase the size of the entire crusher accordingly, and it is sufficient to simply design the support plate to be wide and add through holes.

Therefore, the overall weight of the crusher does not increase significantly, so even a crusher with a larger maximum opening width than conventional crushers can be mounted on a work cart such as a power shovel.

Since the weight of the crusher is small in spite of its large maximum opening width, it has the advantage of being able to easily make small turns even in narrow demolition sites.

[Brief explanation of drawings]

Figure 1 is a schematic vertical cross-sectional view of the crusher according to this invention, Figure 2 is a front view showing the crusher in Figure 1 with the rotating arm installed in a different position, and Figure 3 is the III in Figure 2. Fig. 4 is a side view showing the state in which the crusher of this invention is mounted on a power shovel, Fig. 5 is a front view showing a modified example of this invention, and Fig. This figure is a perspective view of the shaft fixing plate used in the modification of FIG. 5, and FIG. 7 is a back view of the modification of the shaft fixing plate. 2... Crusher, 4... Support plate,
6, 6...Rotating arm, 8...Double acting cylinder, 10.10...Crushing tooth, 14,14.
...Rotating shaft, 16.16...Through hole, 2
0...Third through hole, 38...Power shovel, 44...Long hole, 48...Shaft fixing plate.

Claims (3)

[Scope of utility model registration request] 1. A support plate that has a bracket section for mounting on a work cart, and 2 that is rotatably attached between the support plates.
In a crusher equipped with a rotary arm and a double-acting cylinder installed between the rear ends of both rotary arms, a third By providing through holes in parallel or by providing a long hole in which the parallel through holes communicate with each other, the position of the rotation axis of at least one rotary arm can be changed, and the maximum opening width of both rotary arms can be changed. A crusher characterized by variable. 2. A third through hole is further provided in one of the through holes in the support plate.
If one or more through holes are provided, the mounting position of the rotating arm can be adjusted by removing the rotating shaft inserted into one of the through holes provided in parallel and reinserting it into the other through hole. The crusher according to claim 1 of the utility model registration claim, characterized in that: 3. Utility model registration claim 1, characterized in that when a straight or bent long hole is provided in the support plate, a shaft fixing plate is attached to close the long hole, leaving an insertion portion for the rotating shaft. The crusher described in section.