JPS6052242B2 - 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 an already laid reinforced concrete roadbed or structure foundation for aging or new construction, a drilling machine is generally used to make holes at regular intervals along the dividing point and the material is stripped using a power shovel, etc. Cracks were created by bending the steel, and the reinforcing bars exposed through the cracks were burnt off with a gas burner or the like to form a head and be removed.

However, this work was extremely inefficient, as it was necessary to perform the breaking of the concrete part with a power shovel and the cutting of the reinforced concrete with a gas burner separately and alternately.

Furthermore, since the crushed material is in large chunks, it is difficult to transport it, and this requires secondary crushing to further divide it into smaller pieces, so it 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, the present invention provides a crusher that can directly and continuously crush materials into small pieces by improving this. The present invention will be explained below using an example of crushing a reinforced concrete roadbed. 1st
In the figure, 1 is the ground, 2 is the concrete roadbed that is the object 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, and 5 is the first arm of the power shovel 3. 2 arms, 5a is the second
A hydraulic cylinder that drives the arm, 6 a crusher, 7 an attachment part of the crusher 6 to the second arm 5, 7a a hydraulic cylinder that swings the crusher 6, 8 a casing of the crusher, '9
9a is a claw provided at the tip of the lower jaw and used for stripping and crushing the concrete roadbed 2; 9b is a cutting blade for cutting reinforcing bars provided inside the lower jaw; 10 10a is a concrete crushing claw provided opposite to the claw 9a of the lower jaw portion 9; A cutting blade 11 for cutting reinforcing bars is provided opposite to the cutting blade 9b of the lower jaw part 9 at different positions, and reference numeral 11 is a rotation support shaft of the upper jaw part. The operation of the above-mentioned component 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 1. Then, by driving the hydraulic cylinder 5a and swinging the second arm 5 with the upper jaw 9 open, the claws 9a of the lower jaw 9 enter between the ground 1 and the concrete roadbed 2, and the end 2 of the concrete roadbed 2 Next, the hydraulic cylinder built into the crusher 6 (described in detail later) is driven to engage the upper jaw part 10 with the lower jaw part 9. Then, the claw 10a at the tip of the upper jaw part 10 The concrete at the end 2'' of the concrete roadbed 2 sandwiched between the upper jaw part 10 and the lower jaw part 9 is crushed into small pieces, and the concrete pieces are dropped to expose the reinforcing bars. 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 made to penetrate deeper between the concrete roadbed 2 and the ground 1, and the new concrete roadbed 2 is created. The part is peeled off and rolled up and inserted between the upper jaw part 10 and the lower jaw part 9. At the same time, the end portion 2'', which had been previously pinched and crushed into only the reinforcing bars, is pushed between the cutting blades 9b and 10b of the upper jaw portion 10 and the lower jaw portion 9. When the upper jaw part 10 is engaged with the lower jaw part 9 by operating the hydraulic cylinder, the concrete is crushed into small pieces by the claws 10a, and at the same time, the cutting blades 10b and 9b break the concrete into small pieces. The small concrete pieces 2a and the divided reinforcing bars 2b thus crushed are left behind as the crusher 6 moves forward, and the crushing operation including cutting of the reinforcing bars continues. 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.The attachment of the crusher 6 to the arm is shown in the figure. In addition to fixing it with the opening facing the power shovel car 3 side as shown in the example, if it is a concrete wall that is to be crushed,
It can also be used by fixing it so that the opening faces outward as shown in .

Next, a structural example of the crusher 6, which is the main component of the present invention, will be described 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 a power shovel arm, and an upper jaw part 10 that faces and meshes 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 consists of a main cylinder 12 with a large diameter and high output, and an auxiliary cylinder 13 with a small diameter and low output attached to move the upper jaw part 10 quickly. The main cylinder 12 connects the cylinder body 12a side end to the casing 8 with a pivot 1.
As shown in FIG.
It is rotatably mounted and held by a pivot 15 on the holder. Further, the auxiliary cylinder 13 has its cylinder body 13a side end rotatably connected and held by a bracket 16 fixed to the casing 8 by a pivot 17, and its rod 13b side end connected to a second force point hole 10d in the upper jaw. It is rotatably attached and fixed by a pivot 18. As shown in FIG.
The distance L from the first force hole 10c provided in the fulcrum hole 10c to the fulcrum hole 10e into which the rotation support shaft 11 is fitted is considerably longer than the distance 1 between the second fulcrum hole 10d and the fulcrum hole 10e. Compared to the main cylinder 12, the auxiliary cylinder 13 can provide a large rotation angle with a small stroke. Further, as shown in FIGS. 4 and 4a, the nails 10a of the upper jaw part 10 are fixed with a narrow width so as to bite into a position slightly inside the nails 9a at the tip of the lower jaw part 9, and the nails 10a of the upper jaw part 10 are fixed with a narrow width so as to bite into the nails 9a at the tip of the lower jaw part 9. The shearing force caused by the edge effect makes it easier to chew in the width direction. The cutting blade 10b and the cutting blade 9b are connected to the lower jaw part 9 and the upper jaw part 10, respectively, as shown in FIGS. 5 and 6.
It is fastened and fixed with bolts 19 and 20 so that it 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 attachment part 7 is attached to a reinforcing plate 7 on the casing 8 of the crusher 6.
A is fixed to the reinforcing plate 7a, and four mounting rings 7b are fixed to the extension of the reinforcing plate 7a. This mounting ring 7b
The crusher 6 is rotatably attached to the tip of the power shovel arm. Next, the upper jaw part 10 of this crusher 6
The meshing operation 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 expanded. Here, a hydraulic pump (not shown) is driven to supply hydraulic pressure to extend the main cylinder 12 and contract the auxiliary cylinder 13. Then, the main cylinder 12 acts on the first force point hole 10c of the upper jaw part 10, and the auxiliary cylinder 13 acts on the second force point hole 10d of the upper jaw part 10, respectively, and rotates the upper jaw part 10 counterclockwise in the figure about the rotation support shaft 11. Rotate in the circular direction. and,
The upper jaw part 10 is moved to the position shown by the two-dot chain line. Further, 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 the above embodiment, the main cylinder 12 is used as the cylinder mechanism for opening and closing the upper jaw part 10.
Although a combination of a main cylinder 12 and an auxiliary cylinder 13 was used, it may be operated with only one main cylinder 12, or a plurality of cylinders may be installed in parallel.

As explained above, the present invention includes a casing having an attachment part to a power shovel arm at the upper part, and a lower end of the casing extending in a substantially L-shape in one direction in the front-rear direction and gradually becoming sharper toward the distal end. The lower jaw has a concave cross section, has a claw at the tip, and a cutting blade inside; The maxillary part has a width narrower than that of the maxillary part, and is pivotally connected to the casing so as to be pivotable in the vertical direction so as to be able to engage from above to the inner side in the width direction of the lower jaw part, and one end is connected to the upper surface near the tip of the maxillary part, and the other end is was pivotally attached to the upper part of the casing, and was equipped with a cylinder that could be expanded and contracted in the vertical direction so as to apply downward crushing force to the upper jaw from above, so that the plate-shaped concrete that peeled and broke at the lower jaw. By using the concave lower jaw and the upper jaw that engages with the inner side of the upper jaw, the edge effect allows the lump to be crushed laterally by shearing force, and the direction of the force acting on the cylinder is By acting downward from above, the crushing force acts directly on the concrete mass, and the entire cylinder acts as a reinforcing beam to directly receive the crushing reaction force of the concrete mass acting on the upper jaw, making it effective and effective. It is possible to apply a strong crushing force, and of course, it has the effect of being able to exert a strong cutting force when cutting reinforcing bars.

[Brief explanation of drawings]

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. 4a is an explanatory diagram of the concrete crushing state of the upper and lower jaw parts, FIG.
7 is a sectional view taken along line B, FIG. 7 is a sectional view taken along line CC in FIG. 2, and FIG. 8 is a rear view of the crusher. 1... Roadbed, 2... Concrete roadbed,
2″... End of concrete roadbed, 3... Power shovel car, 4... First arm, 4a.
... Hydraulic cylinder, 5 ... Second arm, 5a ... Hydraulic cylinder, 6 ... Crusher, 7 ... Mounting part, 8 ...Casinong, 9...Mandible, 9a...Claw, 9
b... Cutting blade, 10... Maxillary part, 10a
...Claw, 10b...Cutting blade, 11...
・Rotation shaft, 12...Main cylinder, 13...
...Auxiliary cylinder, 14, 15, 17, 18...
...Axis, 16...Bracket.

Claims (1)

[Claims] 1. A casing with an attachment part to the power shovel arm on the upper part, and an approximately L length at the lower end of the casing in one direction in the front and back
A lower jaw part that extends into a shape and gradually becomes sharper toward the tip side, has a concave cross section, has a claw at the tip, and has a cutting blade inside; an upper jaw part having a claw at the tip and a cutting blade inside, having a width narrower than the lower jaw part, and pivotally mounted to the casing so as to be pivotable in the vertical direction so as to be able to engage from above to the inside in the width direction of the lower jaw part; One end is connected to the upper surface near the tip of the upper jaw, the other end is pivotally connected to the upper part of the casing, and the cylinder is installed so as to be extendable and retractable in the vertical direction so as to apply a crushing force downward from above to the upper jaw. A crusher characterized by: