JPS6043513B2 - Movable blade tip device in crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tip device for a movable blade in a crusher that can most efficiently crush concrete walls and the like.

BACKGROUND ART Conventionally, a crusher has been developed in which a movable blade and a fixed blade are opened and closed by a hydraulic cylinder, and the two blades crush concrete walls, columns, etc. while gripping them.

To make the crushing more effective, Dekajin installed a sharp protrusion inside the tip of the movable blade. Although it became possible to crush it while grasping it with its sharp protrusion, there were problems such as the crushing resistance force when pushing and breaking was large, a large pressing force was required, and the hydraulic cylinder became large. Therefore, the present invention provides a crusher in which a movable blade and a fixed blade are installed so that they can be opened and closed by a hydraulic cylinder. By fixing the upper surface of the protrusion whose lower side is an arcuate edge to the inside of the tip of the movable blade, the apex angle decreases toward both sides, and the wall thickness also becomes thinner. The crushing force is gradually increased and the crushing resistance is decreased, and
Initially, a concentrated load is applied at the center of the arcuate edge, so the pressing force can be very effectively generated as crushing force, and a movable blade tip device with a large crushing force can be provided, and the hydraulic cylinder can be made smaller. This is a major improvement over the above-mentioned problems.

Its structure will be explained with reference to the drawings.

Reference numeral 1 denotes an outer casing, which has a substantially Ξ-gonal shape when viewed from the side, and is hollow inside.

An opening 2 is formed on the front side of this outer casing 1, and the base side of the movable blade 3 is inserted into the inside of the outer casing 1 through the opening 2, and the base is pivotally supported. The fixed blade 4 corresponding to the movable blade 3 is also inserted with its base side into the interior of the outer casing 1 through the opening 2, and its base is fixed to a reinforcing seat or the like fixed within the outer casing 1. The movable blade 3 and fixed blade 4 can be opened and closed freely,
and is configured to perform a shearing action. The tip of the movable blade 3 and fixed blade 4 is formed into a sharp point. An arm 5 fixed to the base of the movable blade 3 is pivotally connected to an end of a piston rod 7 of a hydraulic cylinder 6 provided in the outer casing 1, and the piston rod farm 5 is driven by the hydraulic cylinder 6. The movable blade 3 is configured to be swingable through the movable blade 3. Reference numeral 8 denotes a protrusion, and its front and rear (left and right sides in Figs. 2, 5 to 8) are formed as conical outer surfaces Ba, Ba, which become sharper as they move downward. It is formed as vertical surfaces (including steeply inclined surfaces) 8b, and the lower side is formed as an arcuate edge 8c.

As shown in Fig. 3, this specific manufacturing process involves first cutting an abacus bead-shaped metal material of an appropriate size in half, and then
The upper surface is formed, and both sides thereof are cut vertically to form vertical surfaces 8b, 8b. Parts of both conical surfaces of the abacus bead are configured as conical outer surfaces 8a, 8a, and a part of the outer peripheral edge of the abacus bead is configured as an arcuate edge 8c. The upper surface of the projection 8 thus constructed is fixed to the inside of the tip of the movable blade 3 by welding or the like. The length of the movable blade 3 is formed to be slightly longer than the length of the fixed blade 4, and even if the protrusion 8 is provided, the movable blade 3 and the fixed blade 4 are completely closed off as shown in FIG. It is configured. Next, the effects will be explained.

First, the process of crushing a concrete wall etc. with the protrusion 8 will be described. First, the center of the arcuate edge 8c intensively presses the wall etc., and then gradually the conical outer surfaces 8a, Press and crush at step 8a.

The conical outer surface 8a of the protrusion 8 in the end view taken along the line ■-■ in FIG. 4 (see FIG. 5) is represented as a straight line, and (See Figure 8) conical outer surface 8
a is expressed as a curved line, and its conical outer surface 8a, 8a
The wall thickness between the two ends also decreases toward both ends. That is, the apex angle of the protrusion 8 gradually becomes smaller toward both ends, and is formed into a more pointed shape. Then, a reaction force acts on both conical outer surfaces 8a, 8a of the protrusion 8 as a reaction from the concrete wall being crushed, and a crushing resistance force acts along this contact surface. The crushing resistance force is a resistance force when the protrusion 8 is pressed into the projection, and is different from the frictional force! Ru. The reaction force acts as a force that crushes concrete walls and the like. Furthermore, since the wall thickness of the protrusion 8 becomes thinner as it goes to both sides, the crushing resistance is reduced as it goes to both sides, making it easier to enter. On the other hand, the protrusion a shown in FIG. Since the fracture resistance is also constant, the crushing resistance is also constant, making it extremely difficult to penetrate to crush it.
4. As described above, in the present invention, the front and back are conical outer surfaces 8a, 8a which become sharper as they go downward, and both sides are vertical surfaces 8b, 8b, and the lower side is an arcuate edge 8.
By fixing the upper surface of the protrusion 8 formed as c to the inside of the tip of the movable blade 3, the arcuate edge 8c can initially be crushed under concentrated load. Since the thickness of the material is constant, the material to be crushed (
It is extremely easy to press into concrete walls, etc.). )Furthermore, at the conical outer surfaces 8a, 8a whose wall thickness gradually decreases toward both ends and whose apex angle also becomes approximately smaller, the crushing force increases toward both ends, and the crushing resistance force increases. It can be made small so that it can easily enter the object to be crushed. In other words, unlike the protrusion a shown in FIG. 10 where a constant reaction force is applied, in the present invention, the crushing force can be substantially increased toward both ends. 2. Its cross section is elliptical, and crushing force is applied radially.

3. The wall thickness becomes thinner toward both ends, and the crushing resistance force can be reduced. This makes it extremely easy for the protrusion 8 to enter the object to be crushed, resulting in the most efficient crushing. 6 can also be made smaller.

As described above, although the protrusion 8 of the present invention has a simple structure in which an abacus bead shape is suitably processed, it has an epoch-making effect of increasing the crushing force.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
The figure is a perspective view of the present invention, Figure 2 is a side view of the main part of the present invention, Figure 3 is a perspective view of the protrusion, Figure 4 is a front view of the protrusion, and Figure 5 is a perspective view of the present invention.
The figure is an end view taken along the line V-■ in Figure 4, Figure 6 is an end view taken along the line ■-■ in Figure 4, Figure 7 is an end view taken along the line Figure 4 ■-■, and Figure 8 is an end view taken along the line Figure 4 ■-■. 9 is a sectional view of the protrusion of the present invention, FIG. 10 is a perspective view of a conventionally known protrusion, and FIG. 11 is a sectional view of the protrusion of the present invention.
FIG. 3...Movable blade, 4...Fixed blade, 6...
...Hydraulic cylinder, 8...Protrusion, 8a.
...Conical outer surface, 8b...Vertical surface, 8c.
......Arc-shaped edge.

Claims (1)

[Claims] 1 In a crusher in which a movable blade and a fixed blade are installed so that they can be opened and closed by a hydraulic cylinder, the front and back have a conical outer surface that becomes sharper as it goes downward, both sides are vertical surfaces, and the lower side is arcuate. A tip device for a movable blade in a crusher, characterized in that an upper surface of a protrusion formed as an edge is fixed inside the tip of the movable blade.