JP2589879B2 - Jaw tip device of crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dismantling a structure (building or the like) made of reinforced concrete or for separating and crushing an object to be crushed such as a roadbed made of concrete or the like. The present invention relates to a jaw tip device of a crushing machine that can grip a crushed object without the distal ends of the fixed jaw main body and the movable jaw main body pressing each other at the top dead center position of the opening / closing hydraulic cylinder. .

[0002]

2. Description of the Related Art Recently, a crushing machine used as a main part for dismantling and crushing structures made of concrete or the like (buildings, etc.) or peeling and crushing roadbeds made of concrete or asphalt has been developed for workability, noiseless, vibrationless, etc. It is actively developed for the purpose. In many of the crushers, the fixed jaw and the movable jaw are opened and closed to crush the object to be crushed, and the opening and closing are mainly performed by a hydraulic cylinder.

[0003]

When the fixed jaw main body and the movable jaw main body are configured to be opened and closed with such an opening / closing hydraulic cylinder, the fixed jaw main body and the movable jaw main body are moved at the top dead center of the opening / closing hydraulic cylinder. Even if the movable jaw body is closed and its tips are exactly aligned and set so that they touch each other, the working accuracy of the crusher itself deteriorates during prolonged use, and the hydraulic cylinder for opening and closing At the top dead center position, the fixed jaw main body and the movable jaw main body may come into abnormal contact with each other, and the crusher itself may be broken by the mutual pressing force.

[0004]

The inventor of the present invention has made intensive studies to solve the above-mentioned problems, and as a result, the present invention relates to a fixed jaw body formed on an outer casing of a crusher and a fixed jaw body. The movable jaw body is pivotally supported on the outer casing of the crusher, a fixed ridge is formed at the tip of the fixed jaw body, and a pressing ridge is formed at the tip of the movable pressing portion. At the top dead center position of the cylinder, the fixed ridge and the pressing ridge are in an engaged state, and the jaw tip device of the crusher having a predetermined gap between the engaged portions as a whole, The problem is solved by preventing the fixed jaw main body and the movable jaw main body from being brought into abnormal contact with each other and destroying the crusher itself by the mutual pressing force.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. The crusher A mainly comprises a crusher outer casing 1, a fixed jaw main body 3, and a movable jaw main body 4.

There are various embodiments of the crusher A,
In the first embodiment, the crusher outer casing 1 is specifically formed in a hollow shape having a substantially inverted L-shape (in FIG. 1), and is provided at a front position (right front in FIG. 1). , An opening 2.

The fixed jaw main body 3 is provided with an opening 2
The fixed jaw main body 3 is integrally formed so as to protrude outward at the lower end of the side, and has a knife shape.

The movable jaw main body 4 is formed in a substantially half-moon shape, a base 4a is formed at the center thereof, inserted into the crusher outer casing 1 through the opening 2, and the base 4a is pivotally supported. It is configured to open and close corresponding to the fixed jaw main body 3.

The movable jaw body 4 is opened and closed by a hydraulic cylinder 7 for opening and closing provided inside the crusher outer casing 1 as shown in FIG. 1. More specifically, as shown in FIG. 4
The movable jaw tip shaft 6 provided at one end of the opening and closing is connected to the piston rod 7a of the opening and closing hydraulic cylinder 7, and is opened and closed by pushing and pulling the piston rod 7a of the opening and closing hydraulic cylinder 7.

Next, in a second embodiment of the crusher A, as shown in FIG. 5, the crusher outer casing 1 is formed in a substantially inverted L-shaped box shape, and an opening 2 is formed on the front surface. A fixed jaw main body 3 is formed at the lower end of the portion 2.

The fixed jaw main body 3 has a long supporting blade 3a, which extends along the longitudinal direction at an intermediate position in the longitudinal direction of the fixed jaw main body 3 on an upper surface (a surface facing the movable jaw main body 4 described later). 3
are formed substantially in parallel.

The supporting blades 3a, 3a,.
A connecting portion 3b, which is perpendicular to the connecting portion 3b and has the same height as that of the connecting portion 3b, is fixed to the distal end side. Is formed.

The upper surface of the tip of the fixed jaw body 3 is
It is formed as a flat end surface 3c.

The movable jaw main body 4 has a human foot shape, and is formed in a box shape from a steel plate in the embodiment having the human foot shape. More specifically, the base 4a of the movable jaw main body 4
Is supported by a shaft 5 provided at the lower end of the opening 2 of the crusher outer casing 1 and swings on the vertical surface of the fixed jaw main body 3.

On the lower surface side of the movable jaw main body 4 (the surface facing the fixed jaw main body 3), a predetermined interval is provided behind a plurality of horizontal splitting blades 8, 8,. ing.

In the first and second embodiments, the fixed jaw main body 3 is configured as a fixed pressing portion 9 on the top surface of the distal end portion thereof, and the distal end of the movable jaw main body 4 is configured as a movable pressing portion 10.

A fixed ridge 9 is provided on the upper surface of the fixed pressing portion 9.
a, 9a,... are formed on the lower surface of the movable pressing portion 10 with pressing ridges 10a, 10a,.

The fixing ridges 9a, 9a,... Have, for example, a plurality of groove-like portions formed continuously on the upper surface side of the fixing pressing portion 9, and the portions between the adjacent groove-like portions also have the fixing ridges 9a, 9a. ,
The same applies to the pressing ridges 10a, 10a,.

The piston rod 7a of the opening / closing hydraulic cylinder 7 is completely pushed out of the cylinder body 7b, that is, the piston rod 7a is in a top dead center state, and the movable jaw main body 4 and the fixed jaw main body 3 are completely closed. , And the pressing ridges 10a, 10a,.
Are engaged with each other.

The engaged state is a state in which the pressing ridge 10a enters the inside of the adjacent fixed ridges 9a, 9a from the tops thereof. More specifically, as shown in FIG. When the virtual neutral line nn is provided between the body 4 and the main body 4 in the closed state, the tops of the fixed ridge 9a and the pressing ridge 10a both exceed the virtual neutral line nn. (See FIG. 3).

In addition, when the piston rod 7a of the opening / closing hydraulic cylinder 7 is at the top dead center position, an appropriate gap d is provided between the tip of the fixed jaw main body 3 and the movable pressing portion 10 (see FIG. 3).
Specifically, the fixed ridges 9a, 9a,... And the pressing ridges 10a, 10a,. I have.

In the crusher A of the second embodiment, the movable pressing portion 10 is provided as a separate member at the tip of the movable jaw main body 4.

Further, the movable pressing portion 10 provided as a separate material is provided on the lower surface of the distal end of the movable jaw main body 4 and separated on both sides in the width direction. The split large blade 11 may be provided. When the vertically split large blade 11 is formed, the fixed jaw body 3
A U-shaped storage portion 3d is formed in the widthwise middle of the leading end of the U-shaped portion, and the vertically divided large blade 11 is stored in the U-shaped storage portion 3d.

[0024]

According to the first aspect of the present invention, a fixed jaw main body 3 formed on the crusher outer casing 1 and a movable jaw main body 4 corresponding to the fixed jaw main body 3 are pivotally supported on the crusher outer casing 1, .. Are formed at the distal end of the fixed jaw main body 3, and pressing ridges 10 a, 10 a,... Are formed at the distal end of the movable jaw main body 4. , And pressing ridges 10a,
Are engaged with each other, and the jaw tip device of the crusher has a predetermined gap d as a whole between the meshing points. At the dead center position, it is possible to prevent the distal ends of the fixed jaw main body 3 and the movable jaw main body 4 from pressing abnormally, and to prevent the crusher itself from being destroyed. This also has an effect that this can be grasped strongly.

These effects will be described in detail. The piston rod 7a of the opening / closing hydraulic cylinder 7 has a maximum extension Lma.
The fixed jaw main body 3 and the movable jaw main body 4 are closed at the top dead center position x, and at this time, a predetermined gap d is provided between the meshing portions as a whole. It is.

For this reason, even if the tips of the fixed jaw main body 3 and the movable jaw main body 4 are abnormally close to each other when the working accuracy is deteriorated by using the crusher A for a long time, the existence of the gap d is not considered. The fixed jaw main body 3 and the movable jaw main body 4 do not come into contact with each other, and even if they are in contact with each other, the fixed jaw main body 3 and the movable jaw main body 4 are subjected to an abnormal pressing force. It is possible to prevent the crushing machine A itself from being destroyed without pressing each other.

Also, a fixing ridge 9 formed on the fixed jaw main body 3.
a and the pressing ridge 10a formed on the movable jaw main body 4 are in mesh with each other, and a predetermined gap d exists between the meshing portions as a whole, as shown in FIG. Due to the presence of the meshing portion and the interval d, a relatively small crushed object can be satisfactorily grasped without cutting or the like.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a side view showing a partial cross section of FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of the present invention.

FIG. 4 is a sectional view of a main part showing an operation state of the present invention.

FIG. 5 is a sectional view showing an operation state of the present invention.

FIG. 6 is a sectional view of a jaw tip portion according to the present invention.

FIG. 7 is a perspective view of a tip portion of the movable jaw main body.

FIG. 8 is a perspective view of a distal end portion of the fixed jaw main body.

FIG. 9 is a cross-sectional view of a tip portion of another embodiment.

FIG. 10 is a perspective view of a tip portion of the movable jaw main body of FIG. 9;

FIG. 11 is a perspective view of a distal end portion of the fixed jaw main body of FIG. 9;

[Explanation of symbols]

 d ... gap 1 ... crusher outer casing 3 ... fixed jaw main body 4 ... movable jaw main body 7 ... opening and closing hydraulic cylinder 9 ... fixed pressing portion 9a ... fixed protrusion 10 ... movable pressing portion 10a ... pressing protrusion

Continued on the front page (72) Inventor Yuji Nagasawa 1590-60 Hanazonocho, Chiba City High Green Corp. 106 (72) Inventor Yoichiro Kuwahara 366-4 Chigusacho, Chiba City (72) Inventor Tomoaki Yamada Tokyo 5-18-3, Toyocho, Shinagawa-ku, Tokyo (56) References Japanese Utility Model 1988-61-117956 (JP, U)

Claims (1)

(57) [Claims] 1. A fixed jaw main body formed on an outer housing of a crusher and a movable jaw main body corresponding to the fixed jaw main body are supported by the outer housing of the crusher, and a fixed ridge is formed at a tip end portion of the fixed jaw main body. A pressing ridge is formed at the distal end of the movable pressing portion, and the fixed ridge and the pressing ridge are engaged with each other at the top dead center position of the opening / closing hydraulic cylinder of the movable jaw main body.
A jaw tip device for a crusher, characterized by having a predetermined gap therebetween.