JP2989196B2 - Expanding structure of crushing blade - Google Patents

Description

The present invention relates to an expanding structure of a crushing expanding blade.

(B) Conventional technology Conventionally, for example, a casting product is provided with a spout,
The gate is cut by a crusher. In this crusher, left and right expanding blades are attached to the lower part of a cylindrical machine frame so as to be freely expandable in the left and right direction, and a hydraulic cylinder is mounted on the upper part thereof, and the hydraulic cylinder is disposed between the expanding blades by the same cylinder. It is configured to operate the core rod.

Further, the expanding structure of the expanding blade of such a crusher is such that the whole of the upper and lower portions of the core bar is formed in a tapered shape, and the surfaces where the core bars of the left and right expanding blades come into contact are also formed in a tapered shape. .

When the core rod is lowered by the hydraulic cylinder, the taper surface of the core rod pushes the left and right expanding blades outward to crush and cut the pouring gate.

(C) Problems to be Solved by the Invention However, the expanding structure of the crushing expanding blade has the following disadvantages.

In other words, the crusher forms the core rod and the left and right expanding blades in the same plane in a tapered shape over the entire upper and lower sides, respectively.
Because the expanding blade is expanded by the raising and lowering operation of the concentric rod, when the expanding blade is pushed and expanded by all the contact surfaces of the core rod,
Due to the friction between the coaxial rod and the surface of the expanding blade, a large frictional resistance is generated in the operation of the core rod, and a smooth sliding action is not performed. In some cases, the wedge function of the core rod did not work sufficiently, and the entire expanding blade could not be expanded at the same angle.

(D) Means for Solving the Problems According to the present invention, a left and right expanding blade for crushing, a core bar sandwiched between the left and right expanding blades for expanding the expanding blade, and a hydraulic cylinder for moving the core bar forward and backward are provided. In addition, the base end and the tip end of the concentric rod are provided with tapered surfaces of the same inclination that are sharpened toward the tip end respectively, and the middle part between the tapered surfaces is a parallel straight line. At the same time,
It is an object of the present invention to provide an expanding structure of a crushing expanding blade characterized in that a tapered surface having the same shape as the tapered surface at the tip of the concentric rod is provided.

(E) Action In the present invention, a core rod is interposed between the two expanding blades, and the expanding blade is operated to expand in the left-right direction by raising and lowering the core rod, and the opening force is cut by the expanding force. When raising and lowering the core rod, the expanding blade is pushed and expanded by the base end and the distal end of the core rod, and furthermore, the base end and the distal end are provided with the same angled taper surface. Because of this, the expanding blade can easily perform the expanding operation by the respective tapered surfaces.

As described above, according to the present invention, the two tapered surfaces provided on the upper and lower sides of the core rod simultaneously push and open the two upper and lower portions of the expanding pieces at the same angle, thereby reducing friction and facilitating the crushing operation. Can be.

(F) Embodiment An embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2, (A) shows a gate crusher to which the expanding structure of the crushing blade of the present invention is applied, and the gate crusher (A) has a cylindrical shape. Machine frame (a)
The left and right expanding blades (4) and (4 '), which will be described later, are protruded from the lower end of the frame, and the expanding blades (4) and (4') are operated at the upper end of the machine frame (a). Hydraulic cylinder (1) is mounted.

In addition, the right and left expanding blades (4) are connected to the rod (1a) of the hydraulic cylinder (1) via a connecting fitting (2).
The core rod (3) arranged between (4 ') is connected.

Then, the core rod (3) is vertically moved up and down by the hydraulic cylinder (1), and the left and right expanding blades are expanded by the concentric rod (3).

In this embodiment, as shown in FIGS. 1 and 3, the core rod (3) is provided with a connection hole (5) at the upper end thereof, and is connected to the hole (5) via a pin (6). It is attached to the bracket (2).

Further, as shown in FIGS. 3 and 4, the core rod (3) is formed in a flat plate shape having a certain thickness and a certain length, and its base end is formed in a fan shape. And a tip portion thereof is sharply formed to form a two-stage tapered surface.

In addition, on the left and right side surfaces of the base end portion and the distal end portion of the core rod (3), tapered surfaces of the same angle (θ) that are sharpened in the distal end direction are formed, and the intermediate portion is formed into a parallel straight line.

 Next, the expanding blades (4) and (4 ') will be described.

That is, as shown in FIG. 5 and FIG. 6, a thick shoulder (4a) is provided on the upper part of the elongated expanding blade (4) (4 '), and the shoulder (4a) is provided. 4a) is attached to the lower part of the machine frame (a).

Further, as shown in FIG. 1, a widening blade insertion hole (a-1) is provided on the left and right side surfaces of the machine frame (a), and the widening blade (4) is inserted into the insertion hole (a-1). ) And (4 ') are inserted so that the expanding blades (4) and (4') can be expanded in the left-right direction.

Further, as shown in FIGS. 5 and 6, the expanding blades (4) and (4 ') have mounting holes (7) for mounting a spring (8) on the outer surface of the shoulder (4a). As shown in FIG. 1, a spring (8) is inserted into the mounting hole (7), and the other end of the spring (8) is inserted into the insertion hole (a-) of the machine frame (a). The right and left expanding blades (4) are urged inwardly by the springs (8) through the engagement of the push plate (19) attached to (1).

Also, as shown in FIGS. 5 and 6, a vertical groove (9) slightly wider than the thickness of the core rod (3) is formed on the inner surface of the expanding blade (4). The shape of the vertical groove (9) is linear from the base end to the middle, and the tip (9a) is inclined to be tapered.

The core rod (3) is interposed between the left and right expanding blades (4) and (4 '), and is loosely fitted into the vertical groove (9) of each of the expanding blades (4) and (4'). ing.

In addition, the right and left widening blade (4) via the spring (8)
In the contracted state of (4 '), each expanding blade (4)
The both sides of the core rod (3) are brought into contact with the vertical groove (9) of (4 '), and the tapered end surface (3c) of the core rod (3) is connected to each of the expanding blades (4) (4'). ), The core rod (3) and the right and left widening blades (4) and (4 ') are in close contact with each other by being positioned at the tapered tip (9a) of the vertical groove (9) provided in the vertical groove (9).

Further, the base tapered surface (3b) of the core rod (3) protrudes above the left and right expanding blades (4) and (4 '), and presses the core rod (3) by the operation of the hydraulic cylinder (1). Then
The left and right expanding blades (4) and (4 ') are configured to expand in parallel with the base tapered surface (3b) and the distal tapered surface (3c) of the core rod (3).

A guide rail (11) is provided on the machine frame (a) supporting the expanding blades (4) and (4 '), and the sluice crusher (A) moves on the guide rail (11). It is configured to be able to.

In the case of using the sprue crusher (A) using the expanding structure of the present invention instead of the conventional crusher, the hydraulic cylinder (1) is lowered, and the core rod (3) is lowered. The tapered surfaces (3b) and (3c) at the base end and the tip end of 3) are the base straight portion and the tip end tapered surface (8a) of the two expanding blades (4) and (4 ').
Push in both directions.

For this reason, since the both expanding blades (4) and (4 ') simultaneously expand the base portion and the distal end portion in synchronization, the distal end of the core rod (3) can be protruded smoothly and the both expanding blades (4) and (4') can be smoothly extended. 4)
Since the base end and the front end of (4 ') are simultaneously expanded with the same expansion width, the expansion stress of both expansion blades (4) and (4') can be made uniform as a whole, and the crushing ability can be improved.

Therefore, the casting is placed in the lower part of the above-mentioned guide rail (11), and the sluice crusher (A) is placed on this guide rail (1).
1) If the core rod (3) is moved up and down by operating the hydraulic cylinder (1) while moving upward, the gate remaining in the casting can be continuously crushed.

As described above, according to the present invention, both the expanding blades (4) and (4 ') can be expanded to the left and right in synchronization with the vertical movement of the core bar (3). With the base end of the core rod (3), there is no need to pry the two expanding blades (4) and (4 '),
The operation is very easy, and the tapered surface is formed in two steps at the base end and the tip of the core rod (3). The overall shape is compact, and the external structure is easy to handle during crushing work.

Also, when the expanding structure of the present invention is used for a sprue crusher (A), the core rod (3) and both expanding blades (4) and (4 ') are moved along the guide rail (11). By doing so, it becomes possible to continuously perform the crushing operation of the sprue of the casting, and the working efficiency is remarkably improved, which can greatly contribute to the reduction of the molding cost.

[Brief description of the drawings]

FIG. 1 is a front view of a sprue crusher using the spread structure of the present invention, FIG. 2 is a side view of the sprue crusher, and FIGS. 3 and 4 are the cores of main parts of the spread structure of the present invention. FIGS. 5 and 6 are a front view and a side view, respectively, of a main part of the expanding blade according to the present invention. (A): Sluice crusher (1): Hydraulic cylinder (3): Core rod (4) (4 '): Spread blade (8) (8'): Spring

Claims (1)

(57) [Claims] The right and left widening blades (4) and (4 ') for crushing are sandwiched between the right and left widening blades (4) and (4').
It comprises a core rod (5) for expanding the (4 ') and a hydraulic cylinder (1) for moving the core rod (3) forward and backward. A tapered surface of the same inclination, which is sharpened toward each direction, is provided, and a halfway portion between the tapered surfaces is made a parallel straight line. And a conical rod (3) having a tapered surface having the same shape as the tapered surface at the tip of the concentric rod (3).