JPH08165804A - Concrete crushing device - Google Patents

Abstract

PURPOSE: To improve crushing efficiency by rockably supporting a cylinder driving a moving edge holding and crushing a lump, supporting a pivotal support section with a spherical surface bearing, and facing the moving edge nearly perpendicularly to a collapse face. CONSTITUTION: A cylinder 5 driving the moving edge 4 of a concrete crushing device 1 fitted at the tip of a work machine arm is rockably fitted to a spindle 18, the spindle 18 is supported by a spherical surface sliding bearing, and the cylinder 5 is made tiltable in the width direction. A concrete lump is held between a fixed lower edge 3 and the moving edge 4 provided with a middle tooth 12 and a cutter 13, and the cylinder 5 is hydraulically driven to collapse the concrete lump. When the concrete lump is held for a collapse, a moving arm 14 is set so that the moving edge 4 is faced to the collapse face nearly perpendicularly, and the concrete lump can be easily crushed while the oil pressure is not increased. Thereby the crushing efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete crushing apparatus for crushing a concrete structure at a work site for demolishing a building or the like.

[0002]

2. Description of the Related Art Conventionally, concrete used in buildings, roads, etc. has been destroyed by a concrete crushing device called a breaker. This concrete crushing device has been proposed in Japanese Utility Model Publication No. 61-28839 in order not only to crush concrete but also to make a large lump of crushed concrete into a relatively small lump. In this device, as shown in FIG. 5, a body 53 is provided at the tip of an arm 51 provided in a working machine via a bracket 52, and a fixed lower blade 54 and a fixed lower blade 54 are provided below the body 53. A movable upper blade 55 pivotally supported by the upper blade 55 is provided, and an upper blade driving cylinder 56 is provided above the movable upper blade 55.

The tip of the fixed lower blade 54 is provided with a pointed tip, and a wedge-shaped blade 57 is formed on the upper surface extending from the tip to the rear part. A plurality of auxiliary blade rows are attached in a direction orthogonal to the blades 57, and a space serving as a hole 58 is provided between the auxiliary blade rows. The movable upper blade 55
Has a pyramid-shaped long tooth 59 and a short tooth 60 on the surface which meshes with the fixed lower blade 54, and is opened and closed with respect to the fixed lower blade 54 about the shaft 61 by the operation of the upper blade driving cylinder 56. It is designed to rotate.

In the concrete crushing apparatus 50 having the above-mentioned structure, concrete is scooped up on the fixed lower blade 54 with the movable upper blade 55 being lifted upward, and the upper blade driving cylinder 56 is operated to fix the concrete to the movable upper blade 55. The crushing work is performed so as to bite with the lower blade 54, and the hole 58 of the fixed lower blade 54
The more crushed concrete was dropped and crushed into fine lumps.

[0005]

However, in the concrete crushing device 50 described above, since the tooth top of the movable upper blade 55 always acts in the vertical direction with respect to the fixed lower blade 54, the crushing force can be increased. It is necessary to increase the acting force of the upper blade driving cylinder 56. In particular, since concrete is made by adding sand, gravel, etc. to cement, when the tooth tip of the movable upper blade 55 hits a gravel such as gravel, the crushing force sharply decreases and it becomes impossible to crush. An object of the present invention is to provide a concrete crushing device that can crush even if it comes into contact with gravel or the like without increasing the pressing force of the upper blade driving cylinder.

[0006]

The above object of the present invention is achieved by the following constitution. A concrete crushing device (1) for crushing a lump of concrete by sandwiching it with a pair of blades (3, 4), a surface including a direction in which at least one blade (4) is brought into contact with and separated from both blades (3, 4). A concrete crushing device characterized by pivotally supporting in a plane different from that of. A bucket-shaped main body (2) that is provided at the tip of the arm of the working machine and scoops a lump of concrete, and a plurality of pieces that are provided at the tip of the lower end of the front surface of the main body (2) and that are extended on the bottom surface of the main body (2) Fork-shaped frames (8), fixed lower blades (3) provided on the upper surfaces of these frames (8) for mounting the concrete blocks, and the other end that is pivotally supported by the main body (2) A concrete crushing device (1) comprising: a movable upper blade (4) connected to a cylinder (5) and cooperating with the fixed lower blade (3) to crush the lump of concrete. Attachment of a support shaft (15) for rotatably supporting the upper blade (4) and a drive cylinder (5) for driving the movable upper blade (4) vertically with respect to the fixed lower blade (3). The movable upper blade (4) is attached to the cylinder support shaft (18) provided at the position. Teishitaha arcuate swinging to pivot the support means in the widthwise direction with respect to the upper surface of (3) (2
A concrete crushing device characterized by being provided with 1).

[0007]

In the concrete crushing device configured as described above, one of the pair of blades for sandwiching the lump of concrete oscillates, so that the action direction of the blade is not constant and the crushing progresses. Along with this, the direction of the blade can be changed to a direction that effectively acts on the crushing, and the crushing can easily proceed. In the concrete crushing device configured as described above, the movable upper blade starts to bite vertically on a large block of concrete placed on the fixed lower blade to start biting into hard objects such as gravel. When it hits, the direction of the movable upper blade is swung to the left or right in the width direction, avoiding the gravel or the like and entering the concrete side so that the crushing can be easily progressed. Further, by slightly returning the driving cylinder and slightly lifting the movable upper blade, the movable upper blade and the driving cylinder are operated by the swing support means and the supporting device.
It becomes possible to proceed with the crushing by following the cracks formed in the concrete lumps and gravel. As the rocking support means in the present invention, a spherical plain bearing, a universal joint or the like can be used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. 1 is a side view of the concrete crushing device, FIG. 2 is a plan view of the same, FIG. 3 is a first operation diagram of a movable upper blade,
FIG. 4 is a second operation diagram of the movable upper blade. In FIG. 1, a concrete crushing device 1 includes a bucket-shaped main body 2 attached to an arm tip of a working machine such as a tractor,
A plurality of fixed lower blades 3 projecting from the bottom surface of the main body 2 to the front side of the lower end, a movable upper blade 4 rotatably supported by the main body 2, and the movable upper blade 4 are bitten by the fixed lower blade 3. It is composed of a drive cylinder 5 for matching.

The main body 2 is a steel bucket-like member having a substantially triangular shape when viewed from the side, and the front side has an opening 6 on the entire surface, and the back side of the opening 6 (left side in FIG. 1). Is attached to the arm tip of the working machine via a bracket (not shown). A shovel-shaped scooping portion 7 projecting from the opening 6 is provided on the lower side of the main body 2, and a frame 8 projecting like a fork is provided on the upper surface of the scooping portion 7. As shown in FIG. 2, the frames 8 are provided on both sides and the center of the main body 2, and the rear of each frame 8 is provided with an inclined surface 9 on the inside of the main body 2 so that the frame 8 rises and the reinforcing member 10 is interposed therebetween. Is fixed to the main body 2. A piercing portion 11 is provided at the tip of the frame 8 so that a lump of concrete placed on the ground is scooped up on the frame 8.

On the upper surface of the frame 8, the piercing part 11 is formed.
A fixed lower blade 3 composed of an uneven portion is provided from the position flush with the upper surface of the above to the inner side of the inclined surface 9. Each of the protrusions has a wedge shape when viewed from the front side. Since all of these fixed lower blades 3 are provided on each frame 8, three fixed lower blades 3 are provided at a predetermined interval in the embodiment shown in FIG. The movable upper blade 4 is a blade that is inserted between the rows formed by the fixed lower blade 3, and the outer peripheral portion has an eccentric elliptical shape, and two large ones are provided at the front and rear, and at the tip end side. A canine tooth 12 is provided, and a cutter 13 is provided at the rear end. In particular, the large upper blade 4 and the middle tooth 12 have wedge-shaped tips when viewed from the front side.

The above-mentioned movable upper blade 4, the intermediate teeth 12, and the cutter 13 are all provided on the lower surface of the movable arm 14 corresponding to the upper jaw that meshes with the fixed lower blade 3 corresponding to the fixed lower jaw. One end of the movable arm 14 is rotatably locked to a support shaft 15 provided in the vicinity of the reinforcing member 10 on the back side of the frame 8 provided with the fixed lower blade 3, and the other end of the movable arm 14 is an arm. Locking shaft 16 provided on the upper part of the
It is connected to the driving cylinder 5 via.

The drive cylinder 5 is for moving a piston in the cylinder in the left-right direction in FIG. 1 by hydraulic pressure. The locking shaft 16 is engaged with the tip of a piston rod 17 of the drive cylinder 5. The movable arm 14 having the movable upper blade 4 is rotated about the support shaft 15. The opposite side of the drive cylinder 5 on which the piston rod 17 is provided is rotatably provided on a cylinder support shaft 18 provided on the main body 2.

The support shaft 15 of the movable arm 14 and the cylinder support shaft 18 of the drive cylinder 5 are both shown in the center of FIG.
2 (only one of which is shown in FIG. 2) is integrally provided. On the other hand, the movable arm 14 and the engaging portion 20 on the driving cylinder 5 side, which are fitted to the spherical body 19, are provided with the spherical body 19. A spherical plain bearing 21 is provided on the inner surface. The spherical plain bearing 21 makes sliding contact along the surface of the spherical body 19, and the outer periphery of the driving cylinder 5 and the movable arm 14 are arranged in the width direction (direction orthogonal to the plane of the drawing) with respect to the mounting direction of the support shaft 15. It is possible to swing in an arc shape. In general, it is desirable that the rocking is rocked by 5 ° to the left and right with respect to the center position (vertical direction), as shown in FIG.

In the concrete crushing apparatus 1 of the present embodiment constructed as described above, the movable arm 14 is pulled by the piston rod 17 and the fixed lower blade 3 by releasing the urging of the drive cylinder 5. Above (the position indicated by the phantom line in FIG. 1). In this state, the arm of the working machine is actuated to scoop up the concrete block via the piercing part 11 and place it on the fixed lower blade 3. Next, when the driving cylinder 5 is urged, the movable arm 14 pushed by the piston rod 17 rotates about the support shaft 15 in the clockwise direction in FIG. 1, and the movable upper blade provided on the movable arm 14 is rotated. 4 abuts on the concrete block in the vertical direction.

At this time, the concrete block and the movable upper blade 4
If the concrete side is fragile at the contact point, the movable upper blade 4 crushes the concrete by inserting it into the concrete. If the movable upper blade 4 is in contact with gravel contained in concrete,
As shown in FIG. 4, the movable upper blade 4 bends from the vertical position to the left or right by the action of the spherical plain bearing 21 and hits the crushed surface of the lump of concrete at a substantially right angle to avoid gravel and the like. Crush into the fragile part by biting.

As shown in FIG. 2, the biting by converting the angle is performed between each of the plurality of fixed lower blades 3, so that the crushing of the concrete block is facilitated. Further, by repeatedly moving the movable upper blade 4 side up and down by driving the drive cylinder 5, the movable upper blade 4 is moved by the action of the spherical slide bearing 21 provided on the support shaft 15 and the cylinder support shaft 18 to the right side in the width direction or Crushing is easy because the point of action is converted to the left side. In the above embodiment, the bucket-shaped main body 2 provided with the fixed lower blade 3 scoops up concrete lumps, and then the fixed lower blade 3 and the movable upper blade 4 sandwich and crush the concrete lumps. The invention is not limited to the above embodiment. For example, the structure may be such that a pair of movable blades clamps a concrete block, and in this case, the surface on which the pair of movable blades swings is not limited to the vertical plane, but may be in a horizontal plane or an arbitrary inclined plane. Good. In the above embodiment, a universal joint may be used instead of the spherical plain bearing 21 so that the support shafts 15 and 18 can swing.

[0017]

As described above in detail, in the concrete crushing device of the present invention, the concrete lump placed on the fixed lower blade is passed through the rocking support means such as the spherical slide bearing or the universal joint. Since the movable upper blades provided are adapted to change the angle and engage with each other, it is possible to realize a concrete crushing device that can easily crush even if it comes into contact with gravel in concrete without increasing the pressing force. You can

[Brief description of drawings]

FIG. 1 is a side view of a concrete crushing device according to an embodiment of the present invention.

FIG. 2 is a top view of FIG.

3 is an operation diagram showing a first operation of the upper blade in the concrete crushing device of FIG. 1. FIG.

FIG. 4 is an operation diagram showing a second operation of the upper blade in the concrete crushing device of FIG. 1.

FIG. 5 is a side view of a conventional concrete crushing device.

[Explanation of symbols]

 1 Concrete crushing device 2 Main body 3 Fixed lower blade 4 Movable upper blade 5 Driving cylinder 8 Frame 15 Support shaft 18 Cylinder support shaft 21 Spherical plain bearing

Claims (2)

[Claims] 1. A concrete crushing device (1) for holding and crushing a lump of concrete with a pair of blades (3, 4), wherein both blades (3, 4) separate at least one blade (4). A concrete crushing device, which is pivotally supported in a plane different from a plane including a contact direction. 2. A bucket-shaped main body (2) provided at the tip of an arm of a working machine for scooping a lump of concrete, and a front end of the main body (2) at the lower end of the front surface of the main body (2). A plurality of stretched fork-shaped frames (8), a fixed lower blade (3) provided on the upper surface of these frames (8) for mounting the concrete block, and pivotally supported by the main body (2). In a concrete crushing device (1), the other end of which is connected to a driving cylinder (5), and which comprises a movable upper blade (4) for crushing the concrete block in cooperation with the fixed lower blade (3). A support shaft (15) for rotatably supporting the movable upper blade (4)
And a cylinder support shaft (18) provided at a main body mounting position of a drive cylinder (5) for vertically driving the movable upper blade (4) with respect to the fixed lower blade (3). A concrete crushing device comprising swing support means (21) for swinging (4) in an arc shape in the width direction with respect to the upper surface of the fixed lower blade (3).