JPS5947790B2 - Crushing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crusher for crushing and removing reinforced concrete structures such as concrete roadbeds.

Conventionally, in order to remove reinforced concrete concrete 1, roadbed, and structure foundations that have already been laid for aging or new construction, it is common to use a drilling machine to drill holes at regular intervals along the dividing position. Cracks were created by bending the steel with a power shovel, and then the reinforcing bars exposed through the cracks were burned off with a gas burner to form blocks and be removed.

However, this work required separate and alternating processes of breaking the concrete using a power shovel and cutting the reinforced concrete using a gas burner, resulting in very poor work efficiency.

In addition, since the crushed materials are in large chunks, it is difficult to transport them, and secondary crushing is required to further divide them into smaller pieces, so they must be re-processed by the crushing equipment at another work site, which is extremely difficult. This required time and effort and increased the crushing cost.

Therefore, in view of the above-mentioned drawbacks, this invention improves this, and
This provides a shredding machine that can directly and continuously shred into small pieces.

The present invention will be explained below using an example of crushing a reinforced concrete roadbed.

In Figure 1, 1 is the ground, 2 is the concrete roadbed which is the material to be crushed, 3 is the power shovel car, 4 is the first arm of the power shovel, 4a is the hydraulic cylinder that drives the first arm 4, 5 is the power shovel 3 second arm, 5a
is a hydraulic cylinder that drives the second arm, 6 is a crusher,
7 is an attachment part of the crusher 6 to the second arm 5, 7a is a hydraulic cylinder that swings the crusher 6, 8 is a casing of the crusher, 9 is a lower jaw part provided at the bottom of the casing 8, 9a
is provided at the tip of the lower jaw part and is used for stripping and crushing the concrete roadbed 2; 9b is a cutting blade provided inside the lower jaw part for cutting reinforcing steel; 10 is a claw that faces the lower jaw part 9 so that it can be engaged with the lower jaw part 9; an upper jaw portion rotatably pivoted to the casing 8;
0a is a concrete crushing claw provided opposite the claw 9a of the lower jaw portion 9; 10b is a cutting blade for cutting reinforcing bars provided opposite the cutting edge 9b of the lower jaw portion 9 at different positions; It is the rotation axis of the upper jaw.

゛The operation of the above-mentioned configuration device will be explained.

Drive the power shovel car 3 and clear the concrete roadbed 2
By arranging the openings formed by the upper jaw part 10 and lower jaw part 9 of the crusher 6 to face each other at the end of the crusher 6, and driving the hydraulic cylinder 4a,
The first arm 4 is moved to position the lower jaw part 9 at the surface level of the ground l.

Then, with the upper jaw 9 open, the hydraulic cylinder 5a is driven to swing the second arm 5, thereby opening the claw 9a of the lower jaw 9.
is inserted between the ground 1 and the concrete roadbed 2, and the end portion 2 of the concrete roadbed 2 is rolled up so as to be peeled off.

Next, a hydraulic cylinder (described in detail later) built into the crusher 6 is driven to cause the upper jaw part 10 to mesh with the lower jaw part 9.

Then, the claw 10a at the tip of the upper jaw part 10 crushes the concrete at the end 2' of the concrete roadbed 2, which is sandwiched between the jaw part 10 and the lower jaw part 9, into small pieces, drops the concrete pieces, and breaks the reinforcing bars. expose.

Then, by operating the power shovel car 3, the hydraulic cylinder 5a, the second arm 5, etc., the claw 9a at the tip of the lower jaw part 9 is penetrated deeper between the concrete roadbed 2 and the ground, and a new part of the concrete roadbed 2 is created. Roll up the part as if peeling it off and insert it between the upper jaw part 10 and the lower jaw part 9.

At the same time, the ends 2', which had been pinched and crushed to just the reinforcing bars, are cut into the cutting edges 9b of the upper jaw part 10 and lower jaw part 9.

10b.

Next, when the hydraulic cylinder built into the crusher 6 is operated to cause the upper jaw part 10 to engage with the lower jaw part 9, the concrete is crushed into small pieces by the claws 10a and at the same time the cutting blades 10b, The reinforcing bar is cut by 9b.

The thus crushed concrete pieces 2a and divided reinforcing bars 2b are left behind as the crusher 6 moves forward, and the crushing operation including cutting of the reinforcing bars can be performed continuously.

In this way, all the reinforced concrete structures crushed by the crusher 6 of the present invention are broken into small pieces, and there is no need for secondary crushing.

Note that when installing the crusher 6 on the arm, in addition to fixing it with the opening facing the power shovel car 3 side as shown in the example shown, for example, if the object to be crushed is concrete 1/wall, the It can also be used fixedly with the opening facing outward as shown at 6'.Next, a structural example of the crusher 6, which is the main component of the present invention, will be explained in detail.

In the following description, the same reference numerals as in FIG. 1 indicate the same parts.

As shown in FIG. 2, the crusher 6 is provided with a lower jaw part 9 on a casing 8 having an attachment part 7 to the power shovel arm, and the upper lug 10 that faces and engages with the lower jaw part 9 is shown in cross section in FIG. As shown, it is pivoted by a rotating support shaft 11 and driven by a cylinder mechanism.

The cylinder mechanism has a main cylinder 12 with a large diameter and high output,
It consists of a combination with an auxiliary cylinder 13 with a small diameter and low output, which is attached to move the upper jaw part 10 quickly.

The main cylinder 12 has an end on the cylinder body 12a side rotatably attached to and held by the casing 8 by a pivot 14, and an end on the rod 12b side as shown in FIG.
is rotatably attached to the first force point hole 10c by a pivot 15.
Retained.

In addition, the auxiliary cylinder 13 has its cylinder main body 13a side end connected to a bracket 16 fixed to the casing 8 with a pivot 17.
The end portion of the rod 13b is rotatably connected and fixed to the second force point hole 10d of the two-jaw portion by a pivot shaft 18.

A first force point hole 10 provided in the upper jaw part 10 as shown in FIG.
The distance from c to the fulcrum hole 10e into which the rotational support shaft 11 is fitted is considerably longer than the distance l between the second force point hole 10d and the fulcrum hole 10e, and the auxiliary cylinder 13 is connected to the main cylinder. Compared to No. 12, a large rotation angle can be given with a small stroke.

Further, as shown in FIG. 4, the claws 10a of the upper jaw part 10 are fixedly installed so as to bite slightly inwardly than the claws 7a at the tip of the lower jaw part 9, making it easier to crush concrete.

As shown in FIGS. 5 and 6, the cutting blade Ob and the cutting blade 9b are fastened to the lower jaw part 10 and the upper jaw part 9 with pins 1-19.20 so that they can be replaced. .

The positional relationship between the cutting blade 10b and the cutting blade 9b is such that they face each other and rub against each other in order to cut the reinforcing steel.

As shown in FIG. 2 and FIG. 8, which is a right side view thereof, the mounting portion 7 has a reinforcing plate 7a fixed to the casing 8 of the crusher 6, and four mounting rings attached to an extension of the reinforcing plate 7b. 7b is fixedly installed.

This attachment ring 7b allows the crusher 6 to be rotatably attached to the tip of the power shovel arm.

Next, the meshing operation of the upper jaw portion 10 of this crusher 6 will be explained.

In the open state shown by the solid line in FIG. 2, the main cylinder 12 is contracted and the auxiliary cylinder 13 is extended.

At this point, the hydraulic pump (not shown) is pumped once to supply hydraulic pressure to extend the main cylinder 12 and retract the auxiliary cylinder 19.

Then, the main cylinder 12 is inserted into the first force point hole 1 of the upper jaw part 10.
At 0c, the auxiliary cylinders 13 act on the second force point holes 10d of the upper jaw part 10, respectively, and rotate the upper jaw part 10 in the counterclockwise direction in the figure about the rotation support shaft 11.

Then, the upper jaw portion 10 is rotated counterclockwise in the figure.

Then, the upper jaw part 10 is moved to the position shown by the two-dot chain line.

Furthermore, when the main cylinder 12 is contracted and the auxiliary cylinder 13 is extended by a hydraulic pump, the upper jaw portion 10 rotates in the opposite direction and returns to its original state as shown by the solid line.

By repeating such opening and closing operations, crushing work can be performed continuously.

In addition, to describe the individual actions of the main cylinder 12 and the auxiliary cylinder 13 in the opening/closing operation described in 1., the main cylinder 12 has a large diameter and a large output, and the first cylinder on which it acts
Since the distance between the force point hole 10c and the rotational support shaft 11 is large, the speed is slow but a large crushing force is generated.
Can be given to 0.

In addition, the distance l between the second force point hole 10d on which the auxiliary cylinder 13 acts and the rotation support shaft 11 is larger than the distance between the first force point hole 10c on which the main cylinder 12 acts and the rotation support shaft 11. Since it is quite small, a large rotation angle can be obtained with a small process, and since it is small in diameter and has a small oil chamber capacity, the upper jaw part 10 can be engaged at a high speed.

Next, let's consider the actual crushing work.

In the open state shown in FIG. 2, the object to be crushed (not shown) is inserted between the upper jaw part 10 and the lower jaw part 9, and the hydraulic pump is driven to operate the main cylinder 12 and the auxiliary cylinder 13. Since no load is applied to the upper jaw part 10 until the claws 10a of the upper jaw part 10 come into contact with the object to be crushed, a light force is sufficient for operation.

Therefore, the two-jaw portion 10 operates at a high speed due to the contraction force of the auxiliary cylinder 13, which has a small output but can provide a high driving force.

At this time, the main cylinder 12 does not need to apply a crushing force to the upper jaw portion 10, so it expands following the operating speed of the auxiliary cylinder 13.

Next, when the claws 10a of the upper jaw part 10 come into contact with the object to be crushed, a large negative force exceeding the contraction force of the auxiliary cylinder 13 is applied to the upper jaw part 10.

Then, the stretching force of the main cylinder 12 counteracts this,
The object to be crushed is crushed at a small speed and any reinforcing bars are cut.

Furthermore, the upper jaw part 9 starts from the dotted chain line position in Figure 2 where the occlusion is completed.
Drive the hydraulic pump to open the main cylinder 1
2 is contracted and the auxiliary cylinder 13 is expanded.

At this time, since no large load is acting on the upper jaw part 10, the contraction force of the auxiliary cylinder 13 is sufficient to operate the upper jaw part 10.

Then, the main cylinder 12 follows the rapid movement of the auxiliary cylinder 13 and returns to the open state shown by the solid line in FIG.

In other words, the upper jaw part 9 can be opened and closed by the fast movement of the auxiliary cylinder 13, except during the actual crushing operation which requires a large force from the main cylinder 12.10 Working hours can be shortened and work can be carried out efficiently. I can do it.

In the above embodiment, an embodiment is shown in which there is one main cylinder 12 for crushing operation and one auxiliary cylinder 13 for opening/closing operation, but two or more cylinders 12 and 13 may be provided in parallel. .

As explained above, according to the present invention, concrete I
- In the crushing and removal work of reinforced concrete structures such as roadbeds, concrete foundations, and concrete walls, crushing of concrete and cutting of reinforcing bars can be carried out simultaneously and continuously using only one crusher.

Moreover, it can be crushed into small pieces with only one crushing operation, and secondary crushing is not required, so the crushing cost can be reduced.

In addition, the cylinder mechanism that operates the two-jaw section is composed of a high-output main cylinder for crushing operations and a fast-moving auxiliary cylinder for opening and closing operations, so there is less waiting time during work. Improves efficiency.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a concrete roadbed crushing operation using the crusher of the present invention, Fig. 2 is a side view of the crusher, Fig. 3 is a side view of the upper jaw, and Fig. 4 is a plan view of the lower jaw. , FIG. 5 is a cross-sectional view taken along line A-A in FIG. 3, and FIG. 6 is a cross-sectional view taken along line A-A in FIG.
7 is a cross-sectional view taken along the line C-C in FIG. 2.
The h-side view and FIG. 8 are rear views of the crusher. 1... Ground, 2... Concrete 1 roadbed, 2... Edge of concrete roadbed, 3...
...Power shovel car, 4...First arm, 4a...Hydraulic cylinder, 5...Second arm, 5a...Hydraulic cylinder, 6 ...
...Crushing machine, 7...Mounting part, 8...
Casing, 9... Lower jaw part, 9a...
Claw, 9b... Cutting blade, 10... Maxillary part,
10a...,...claw, 10b...cutting blade, 1
1...Rotation shaft, 12...Main cylinder, 13...Auxiliary cylinder, 14.15.1
Otsu 18... Axis, 16... Brackets I
・.

Claims (1)

[Claims] 1. A casing having an attachment part to the power shovel arm on the upper part, a lower jaw part provided at the lower part of the casing having a claw at the front end and a cutting blade inside, and a claw at the front end opposite to the claw and cutting blade of the lower jaw part, The upper jaw part has a cutting edge inside and is rotatably pivoted to the casing so as to be able to engage with the lower jaw part, and the upper jaw part is provided between the casing and the upper jaw part so that the upper jaw part can reciprocate with respect to the lower jaw part. A crusher characterized in that it is equipped with a main cylinder with a large output that is attached and can provide a large crushing force, and an auxiliary cylinder with a small output that is also attached between the cage ring and the upper jaw and allows the upper jaw to move quickly.