JPH04225846A - Crusher - Google Patents

Abstract

PURPOSE:To efficiently carry out 3 kinds of works on the crush, i.e., in a big size crushing and in a small size crushing of an object such as in ferro-concrete case and on cutting of a steel rod, etc., with one device. CONSTITUTION:With tusk parts 8a, 8b of a stationary jaw 1 and a beak part 15 of a movable jaw 3, the crushing in a big size is performed so as to break off the crushing object and, consequently, with the crushing teeth 17a, 17b of the movable jaw 3, the block crushed in a large size is crushed in a small size. Besides, each of the crushing faces 6, 16 of the stationary jaw 1 and the movable jaw 3 are formed flat, thus when both jaws are further engaged, the crushed piece can be made further smaller at the flat parts. Since the edges 20, 13 for metal cutting use are present nearly in the center in the width direction of both jaws, the stress generating on the rotary shaft 4 by cutting is dispersed and the rotary shaft does not generate the clattering.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher, and more particularly to a general-purpose crusher capable of dividing objects into large or small pieces and cutting reinforcing bars, metal plates, etc.

0002

2. Description of the Related Art A device attached to an arm of a construction machine, etc., consisting of a fixed jaw and a movable jaw rotatably attached to the fixed jaw by a drive device such as a hydraulic cylinder. BACKGROUND ART A type of crusher that crushes objects such as concrete structures by meshing a movable jaw and a fixed jaw is widely used. Among these crushers, a metal cutting blade is attached to each jaw, and by meshing both jaws, the blades can be used to cut reinforcing bars, etc. in addition to the above-mentioned crushing work.It has also been put into practical use. has been done.

0003

[Problems to be Solved by the Invention] When the interlocking type crusher is used to crush, for example, a structure made of reinforced concrete, the operations are generally performed in the following order.

[0004] First, the object is crushed into large blocks using a crusher dedicated to large-sized pieces, and the exposed reinforcing bars are cut using a blade for cutting the reinforcing bars. Once the large-splitting and reinforcing bar cutting operations have been completed in this manner, each large-split concrete block is crushed into small pieces using a crusher dedicated to small-splitting to facilitate post-processing such as transportation and disposal. That is, conventionally, separate devices were required for large and small slicing. However, although there were some crushers that could do both large and small pieces, they were not able to do both jobs efficiently, and being good at one job would be less efficient at the other. That is the reality.

Next, the blades for cutting reinforcing bars, iron plates, etc. are arranged only on one side edge of the movable jaw and the fixed jaw, so that the object can be cut to an appropriate length using this set of blades. It has become. Incidentally, if blades are provided on both sides of both jaws, the object will be cut by these two sets of blades to a length corresponding to the spacing between these two sets of blades, and it will not be possible to cut the object to any length. I become unable to do so.

However, by arranging the blade only on one side edge in this way, a moment is generated that causes the blade to be eccentric from the axis of rotation, which is the rotation center of the movable jaw, during cutting work. However, this moment acts to loosen the attachment of the movable jaw. As a result, over time, the attachment of the movable jaws becomes loose, creating a gap between the blades of both jaws during cutting, making it difficult or even impossible to cut the object. There is.

[0007]

SUMMARY OF THE INVENTION The present invention is constructed to solve the problems of the conventional apparatus described above. That is, the present invention is a crusher comprising a fixed jaw and a movable jaw rotatably attached to the fixed jaw, and the distal end of the fixed jaw has a shaft extending toward the rotating shaft supporting the movable jaw. A movable recess is formed, a pair of fangs separated by the formation of the recess, and a protrusion adjacent to the recess and protruding almost orthogonally to the fracture surface. The tip of the jaw has a beak that is located in this recess when the jaw engages, and these recesses,
The fangs and beak form a large part.

[0008] Furthermore, a flat portion is formed on the fixed jaw in connection with this recess, and an opening is formed in this flat portion. A crushing tooth is provided protruding from the movable jaw at a position corresponding to this opening, and the crushing tooth is positioned within the opening when the two jaws are engaged, and the small Form a split part.

Furthermore, an opening is formed in connection with the flat part,
A blade (lower blade) for cutting reinforcing bars, metal plates, etc. is attached to the approximate center of this opening, and the lower blade is attached to the movable jaw at the part that corresponds to the attachment position of this lower blade. An engaging blade (upper blade) is attached.

0010

[Operation] After placing the crusher on the object to be crushed, by closing the movable jaws, a force is applied to the object to be crushed at the large part, and as a result, the object is divided into two or several blocks. divided. Furthermore, by closing the movable jaws, each block is crushed into small blocks by the crushing teeth of the movable jaws, and further crushed into smaller blocks by the flat portions of both jaws.

[0011] Also, exposed reinforcing bars and metal plates are cut by upper and lower blades located deep in both jaws. In this case, since the blade is located approximately at the center in the width direction of the jaw, the force required for cutting does not act as bending stress on the rotation axis.

0012

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the outline of the configuration of the present invention will be explained with reference to FIG.

Reference numeral 1 denotes a fixed jaw, and 2 denotes a bracket for connecting the entire crusher including the fixed jaw 1 to an object to be mounted such as an arm of a construction machine.
The main body of the crusher is composed of the brats 2 connected to the main body of the crusher.

Reference numeral 3 denotes a movable jaw which is rotatably attached to the fixed jaw 1 by a rotation shaft 4 disposed at the base of the fixed jaw 1. Reference numeral 5 denotes a hydraulic cylinder for operating the movable jaw 3, and by opening and closing the movable jaw 3 using the driving force of the hydraulic cylinder 5, the object is crushed or cut.

Next, details of the structure of each part constituting the crusher will be explained.

FIGS. 2 and 4 show the structure of the fixed jaw 1. FIG.

The crushing surface 6 of the fixed jaw 1, that is, the surface that faces the crushing surface of the movable jaw 3 when engaged with the movable jaw 3, is formed flat so that the entire crushing surface is located on a specific virtual plane P. . Reference numeral 7 denotes a recess formed at the tip of the fixed jaw 1, and by forming the recess 7, a pair of fangs 8a and 8b are protruded from both sides of the recess 7. 9 is the fracture surface 6
It is a convex body disposed so as to protrude upward from the crushing surface 6 at a portion connected to the recess 7, and in the illustrated configuration, the side surface shape is approximately semicircular. The planar portion having the fangs 8a, 8b and the convex body 9, together with the corresponding portion of the movable jaws described later, constitutes a large dividing portion that roughly divides the object to be crushed.

Next, openings 10a and 10b are formed in a portion of the crushing surface 6 that is connected to the large portion. These openings 10a and 10b are for inserting crushing teeth protruding from the crushing surface of the movable jaw 3 when the movable jaw 3, which will be described later, comes into close contact with the fixed jaw 1. This opening 10a,
The portion forming 10b, together with the corresponding portion of the movable jaw 3, serves as a small-splitting portion for further crushing the large-split object into smaller pieces.

A large opening (hereinafter referred to as "large opening") 11 is formed at the throat portion, ie, the base, of the movable jaw 1 following the small split portion. A support beam 12 is formed approximately in the center of this large opening 11 in the longitudinal direction of the fixed jaw 1 so that its upper end edge is located on the virtual plane P. A blade (hereinafter referred to as "lower blade") 13 for cutting metal materials such as reinforcing bars is attached to the support beam 12 by a removable fixing means such as a bolt 14. The fixing means is bolt 1.
4, the top of the bolt 14 is embedded in the side edge of the lower blade 13, so that it is possible to rub the side edge of the upper blade and this lower blade side, which will be described later. It has become.

3 and 5 show details of the construction of the movable jaw 3.

The distal end portion of the movable jaw 3 is tapered, and the distal end of this tapered portion becomes a beak portion 15. When the movable jaw 3 is closed, the beak portion 15 is shaped like the fixed jaw 1. It is arranged to be located within the recess 7 of. Reference numeral 15a denotes a recess formed inside the beak 15, and the convex body 9 of the fixed jaw 1 is located in this recess 15a when both jaws are closed. This beak portion 15 corresponds to the large portion of the fixed jaw 1 and is a portion that functions as the large portion of the movable jaw 3.

Next, the surface connected to the tapered part and facing the crushing surface 6 of the fixed jaw 1 is a flat crushing surface 16 whose entire surface is located on a specific virtual plane similarly to the crushing surface 6. It has become. For the crushing surface 16, a pair of crushing teeth 17a,
17b is provided protrudingly. Although the illustrated crushing teeth are formed into a substantially conical shape, the shape is not limited to this shape, and it is sufficient that the crushing teeth protrude in a shape that crushes the object. The crushing teeth 17a, 17b are arranged so as to be located within the openings 10a, 10b of the fixed jaw 1, respectively, when both jaws are closed. That is, this crushing tooth protruding portion forms a small division in the movable jaw 3.

Reference numeral 18 denotes a large opening on the movable jaw side corresponding to the large opening 11 of the fixed jaw 1. Reference numeral 19 denotes a support beam provided in this large opening 18, and an upper blade 20 is attached to this support beam 19 via attachment means 21 such as bolts. Note that, unlike the lower blade 13, the upper blade 20 is positioned to protrude from the crushing surface 16. This upper blade 20 engages with the lower blade 13 of the fixed jaw 1, and when the two jaws are closed together, the double blades 13 and 20 close together like scissors to cut the object.

Next, the operating state of this crusher will be explained.

When the object to be crushed is a concrete wall, the object to be crushed is placed in both jaws with both jaws open so that the object is located in the large part. When the movable jaw 3 is closed in this state, the beak 15 of the movable jaw 3 first presses a part of the object to be crushed toward the recess 7 of the fixed jaw 1. As a result, the object to be crushed is crushed so as to be bent around the beak 15. Further, at almost the same time as this crushing, the crushing is also performed by the engagement of the recess 15a of the beak portion 15 with the convex body 9 of the fixed jaw 1. As a result, the object to be crushed is first crushed into a plurality of large blocks. When the movable jaw 3 is further closed, the movable jaw 3
The crushing teeth 17a, 17b further crush this block into small pieces to perform small division. Note that part of the small split is also performed in the large split by closing both jaws. The object finally crushed into small pieces passes through the openings 10a and 10b, the recess 7, and a part of the object falls through the large opening 11 to the lower part of the crusher.

On the other hand, when cutting reinforcing bars exposed by crushing, discarded iron plates, etc., the crusher is arranged so that the object is located between the upper and lower blades, and the cutting operation is performed in this state. That is, by closing the fixed jaw 4, the upper blade 20 and the lower blade 13 are closed together like scissors to cut the object. In this case, since the upper and lower blades are located approximately at the center in the width direction of the movable jaw 3 and fixed jaw 1, the force associated with cutting is approximately dispersed in the width direction. As a result, even if a large force is applied during cutting, bending stress is not generated on the rotating shaft 4, and wobbling around the rotating shaft portion can be prevented from occurring.

[0028]

[Effect] As explained in detail above, the present invention consists of a fixed jaw and a movable jaw that is rotatably attached to the fixed jaw. A concave part is formed in the recess, and a convex part protrudes adjacent to the concave part.The distal end of the movable jaw is formed with a beak part that is located in this concave part when engaged. A large part is formed by the beak, and a flat part is formed in the fixed jaw in connection with this recess, and an opening is formed in this flat part, and the movable jaw corresponds to this opening. Since the crushing teeth are provided protrudingly at the positions where the crushing teeth are formed to form the small dividing portions, large and small dividing operations can be performed efficiently with one crusher.

[0029] Furthermore, since the blade for cutting metal materials is provided approximately at the center in the width direction of the fixed jaw and the movable jaw, stress is distributed over the entire rotating shaft that supports the movable jaw when cutting the object. , it is possible to effectively prevent rattling of the rotation shaft portion.

[Brief explanation of the drawing]

FIG. 1 is a side view of a crusher.

FIG. 2 is a perspective view of a fixed jaw.

FIG. 3 is a perspective view of the movable jaw.

FIG. 4 is a partial plan view of the fixed jaw.

FIG. 5 is a partial plan view of the movable jaw.

[Explanation of symbols]

1 Fixed jaw 2 Bracket 3 Movable jaw 4 Rotation axis 5 Hydraulic cylinder 6 Fracture surface 7 Recess 8a, 8b Fang part 9 Convex body 10a, 10b opening 13 Lower blade 15 Beak 16 Fracture surface 17a, 17b Crushing teeth 20 Upper blade

Claims (3)

[Claims] [Claim 1] Consists of a fixed jaw and a movable jaw rotatably supported on the fixed jaw, and a blade for cutting metal materials is attached to the fixed jaw and the movable jaw. Therefore, the crushing surfaces of the fixed jaw and the movable jaw are formed flat so that the entire surface is located on a specific virtual plane, and the fixed jaw is provided with a recess at the tip and a pair of fangs separated by the recess. , and a convex body is formed on the fracture surface connected to the recess to constitute a large part, a small part having an opening is connected to this large part, and further connected to this small part. A lower blade for cutting metal materials is attached to the fixed jaw at approximately the center in the width direction, and the movable jaw has a beak formed at a position corresponding to the recess to form a part of the large split part. A crushing tooth is provided protruding from the crushing surface connected to the beak at a position corresponding to the opening of the fixed jaw, forming a part of the small splitting part, and a crushing tooth is provided at a position corresponding to the lower blade. A crusher characterized in that an upper blade that engages with the blade is attached. 2. The crusher according to claim 1, wherein the crushing surface of the movable jaw is also formed flat so that the entire surface is located on a specific virtual plane. 3. Of the upper and lower blades for cutting metal materials, the lower blade on the fixed jaw side is attached to the fixed jaw such that the upper edge of the cutting portion coincides with the fixed jaw plane, and the upper blade on the movable jaw side is attached to the fixed jaw side. The crusher according to claim 1 or 2, wherein the crusher is attached to the movable jaw so that its upper edge protrudes from the crushing surface of the movable jaw.