JPH042270Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a crusher that crushes reinforced concrete or the like by sandwiching it, particularly a crusher that uses water pressure.

[Conventional technology]

Various types of crushers have been proposed for crushing concrete lumps produced by demolition of concrete buildings, or for peeling off and crushing old asphalt boards for road pavement renovation.

For example, the invention described in Japanese Utility Model Publication No. 54-143022 crushes concrete using a fixed arm fixed to a frame and a movable arm rotatably attached to the same frame, and also has a sprinkler for dust prevention. It is something.

[Problem that the invention attempts to solve]

The above-mentioned known example has a fixed blade fixed to the frame on one side, so if a turning mechanism is attached, which is essential for this type of machine, there is a problem that the balance is poor and it is difficult to use. Since there are limits to crushing concrete with just one machine, a significantly larger crusher is required to crush large concrete blocks. Also, sprinklers only prevent the generation of dust by sprinkling water.

[Means for solving problems]

In order to solve the above problems, this invention consists of a pair of crushing arms attached to a frame that can be rotated freely by a drive means, and a water injection nozzle is installed at the tip of the claw provided on each crushing arm, so that water pressure A water pressure supply path leading to the source is communicated with each of the nozzles.

[Effect]

Since this device has the above-mentioned configuration, when concrete, etc. is placed between the crushing arms and the claws of both crushing arms are pressed against the concrete, etc. by the action of the cylinder, both crushing arms rotate evenly to crush the concrete, etc. Crush.

At this time, while pressing the water jet nozzle at the tip of the claw provided on both crushing arms against the concrete etc.
When high-pressure water is injected onto concrete from the same nozzle, high water pressure acts on the cracks created by the pressure of the nails, causing the cracks to grow due to the wedge effect.
Large concrete lumps that cannot be broken by crushing alone can be easily crushed, and at the same time, the generation of dust can be prevented by jetting water.

〔Example〕

In the embodiment shown in FIGS. 1 and 2, 1
is a mounting frame, which is equipped with a mounting hole for mounting on an arm such as a power shovel or a hoisting cylinder, and this mounting frame 1
Frame 2 is connected to. Although the frame 2 can be attached to the mounting frame 1 in any manner, it is preferable that the frame 2 is rotatably supported so that its direction can be arbitrarily changed by the action of a rotational drive device.

The frame 2 has a pair of side plates 4 fixed to both ends of an end plate 3 connected to the mounting frame 1, and a pair of crushing arms 6 supported by a pair of support pins 5 passed between the side plates 4.
The central part of the frame is swingably supported. A cylinder 7 for opening and closing the arm passed between the rear ends of the crushing arms 6 is disposed between the opposing side plates 4, and one end of this cylinder 7 is an extension extending rearward of one crushing arm 6. It is connected to the rear end of section 9 with a pin 10.

The tip of the piston rod 8 protruding from the other end of the cylinder 7 is connected to an extension 9 extending rearward of the other crushing arm 6 by a pin 11.

Each crushing arm 6 is provided with a connecting portion extending from the inner central portion to the other crushing arm 6, and this connecting portion is rotatably connected to both ends of the link 13 by pins.

Reference numerals 14 and 15 designate claws provided at the distal end and intermediate portion of each crushing arm 6 on opposing sides, respectively. Water injection nozzles 16 are provided at the tips of the claws 14 at the tips, respectively.

The nozzle 16 may be formed integrally with the tip of the claw 14 of the crushing arm 6, but in the illustrated example, the nozzle 16 made of another material is fixed to the tip of the claw 14.

The nozzle 16 is made of a hard material such as a hard metal such as cemented carbide.

The nozzle 16 may be fixed to the tip of the claw 14 by brazing, or by press-fitting the chip-shaped nozzle 16 into a hole at the tip of the claw 14 as shown in FIG.

Further, the nozzle 16 is shaped to form a part of the claw 14 at the tip as shown in FIG.
8 is removably fitted into the receiving hole 19 provided in the claw 14, and a horizontal hole is provided in the claw 14 so as to cover both the small diameter portion 18 and the receiving hole 19, and a taper pin, spring pin, etc. There are some that are fixed by driving in a stop pin 20. In this case, pin 2
When the nozzle 16 is removed, the nozzle 16 can be easily removed and replaced.

Each claw 14 is provided with an insertion hole leading to a nozzle 16, and a hydraulic hose 21 connected to the nozzle 16 is connected to this hole.
The hose 21 is inserted through the back of each arm 6 and connected to the joint 22 through a hole provided in the extension 9 of each arm 6, thereby forming a water pressure supply path.

A hydraulic hose 23 connected to the joint 22 is connected via a running joint 25 to a hydraulic hose 26 communicating with a water pressure source.

The hydraulic hose 21 that runs along the back surface of each crushing arm 6 is protected by being embedded in a groove provided on the back surface of the crushing arm 6, or by covering the outside of the hose 21 with a hard cover 27.

In the above embodiment, as shown in FIG. 1, the object 28 to be crushed, such as concrete, is put between the two arms 6 in the open state, and the cylinder 7 is operated by hydraulic pressure, etc., so that each The claw 14 at the tip of the arm 6 is brought close to the object 28, and the claw 14 and the nozzle 16 are strongly pressed against the object 28, as shown in FIG.

On the other hand, high-pressure water from a water pressure source such as a water pressure pump (not shown) is supplied from the water pressure hose 26 → running joint 25 → water pressure hose 23 → joint 2.
2 → Since the water flows through the water pressure hose 21 and is injected from the nozzle 16, high pressure water is injected into the crack created in the object 28 as shown in FIG. The wedge effect caused by the water pressure pushes the cracks apart and causes them to grow rapidly, which also promotes the crushing of the object 28.

Further, as shown in FIG. 6, the concrete 30 attached to the reinforcing bars 29 is finely crushed by the claws 14, and the crushed concrete pieces are blown away by the water jetted from the nozzle 16, and at the same time, the scattering of dust is also prevented.

[Effects] As mentioned above, this device connects a pair of cutter arms attached to the frame with a link so that they rotate in almost the same way so that they overlap at the center, resulting in good weight balance during crushing and smooth turning. I can do it. Furthermore, when cutting concrete, etc., the concrete, etc. is crushed near the center, so that no large reaction force is applied to the arm of the power shovel to which it is attached or its drive cylinder.

In addition, since high-pressure water is injected from the nozzle at the tip of the claw of the crushing arm, the wedge effect of the pressure water acting on the cracks formed in concrete due to the pressure of the claw will cause the cracks to grow, improving the crushing effect. Wetting with water prevents the generation of dust, and water jetting can also remove concrete pieces attached to reinforcing bars that cannot be removed by crushing with nails. Other thin structures such as walls and slabs can be easily cut by water jets from both sides.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the crusher of this invention, Fig. 2 is a plan view of the same as above, and Figs. 3 and 4 are partially cutaway enlarged vertical sectional side views showing examples of the nozzle attachment part. FIGS. 5 and 6 are partially cutaway longitudinal side views showing the crushed state. 2...Frame, 6...Crushing arm, 7...Cylinder, 13...Link, 14, 15...Claw, 1
6... Water injection nozzle, 20... Locking pin, 21,
23, 26...Hydraulic hose.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of crushing arms attached to a frame are configured to be rotatable by a drive means, and a water jet nozzle is provided at the tip of the claw provided on each crushing arm, and a water pressure source is connected to the crushing arm. A hydraulic crusher in which a hydraulic supply path is connected to each of the nozzles. (2) The hydraulic crusher according to claim 1, wherein the nozzle at the tip of the claw of the crushing arm is made of cemented carbide metal and is fixed to the tip of the claw. (3) The combined hydraulic crusher as claimed in claim 1 or 2, wherein the nozzle at the tip of the claw of the crushing arm is detachable from the tip.