JPH02200974A - Crushing device - Google Patents

Abstract

PURPOSE:To improve flexibility and workability by pivotally mounting the intermediate part of a pair of opening and closing bodies having crushing blades, connecting the upper end parts of each opening and closing body with a hydraulic cylinder, and providing a spring device between the opening and closing bodies and a frame. CONSTITUTION:A bracket 11 is fitted to the arm 9 of a working gear such as a hydraulic shovel, and also the frame 2 having a pair of side plates 1 is rotatably attached to the bracket 11. Then the intermediate part of an opening and closing body 3 is inserted between side plates 1 and 1 of the frame 2, the tube 6a of a hydraulic cylinder 6A for opening and closing the body 3 is connected to the upper part of one side body 3, and a piston rod 6b is linked to the other side of the body 3. And a spring device 23 for opening and closing body energizing, which is pressing the receiving surface 3a of the body 3 uniformly left and right, is provided between the frame 2 and the body 3 by providing pushing springs 33 and 34 between vertical plates 26 and 25. This enables the balanced opening of the bodies 3 left and right by the action of the device 23.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a crushing apparatus for crushing reinforced concrete structures and the like.

(Prior Art) As shown in FIG. 6, a conventional crushing device has a frame 2 consisting of a pair of side plates 1, and a pair of opening/closing bodies 3.3 attached to pins 4, 4.
A crushing blade 5a is provided at the tip of the opening/closing body 3, and a cutter 5b for cutting reinforcing bars is provided on the pivot R side, thereby forming the crushing blade 5. Note that the crushing blade 5 may include only the crushing blade 5a or only the cutter 5b. Reference numeral 6 denotes a hydraulic cylinder for opening and closing the opening/closing bodies provided between the upper ends of the opening/closing bodies 3, 3, and is provided freely with respect to the frame 2.

(Problems to be Solved by the Invention) In the conventional crushing device described above, when the opening/closing body 3 is closed to perform crushing, etc., it is not possible to generate a crushing force greater than the force generated by the hydraulic cylinder 6. Furthermore, when the opening/closing body 3 is opened, the contraction force of the hydraulic cylinder 6 simply acts as a force for opening the opening/closing body 3, so when the hydraulic cylinder 6 is extended or contracted, the hydraulic cylinder 6 is required to If there is a large difference in force, or if there is no position regulating means for the expansion and contraction direction of the hydraulic cylinder 6 as shown in the figure, the posture of the opening/closing body 3 with respect to the frame 2 will not be balanced left and right, and the object to be crushed will be There was a problem in that it was difficult to align the crushing blade 5a, etc. with respect to the blade, resulting in poor workability.

The present invention solves these problems and makes effective use of the force of the opening/closing hydraulic cylinder.

The purpose is to provide a crushing device with good workability.

(Means for Solving the Problems) In order to achieve this object, the present invention pivots the intermediate portions of a pair of opening/closing bodies having crushing blades to a frame, and connects the upper end portions of each opening/closing body between the pair of opening/closing bodies. The present invention is characterized in that a spring device is provided between the opening/closing body and the frame, which are connected by a hydraulic cylinder inserted between the side plates, and biasing the opening/closing body in the closing direction.

In addition, in the present invention, the hydraulic cylinder may be a double piston type cylinder in which a pair of piston rods are independent from each other, in addition to the single rod type, and the hydraulic cylinder can be moved vertically within a pair of side plates constituting the frame. It is also possible to adopt a structure in which a device for freely inserting the tube and positioning the tube of the hydraulic cylinder in the longitudinal direction is provided.

(Function) In the present invention, the spring device 2 that urges the N bacterial cells in the closing direction is provided between the frame and the opening/closing body, so the left and right opening/closing bodies are opened in balance by the action of the spring mm. Furthermore, during crushing, the closing force of the spring is added to the closing force of the opening/closing body due to the extension of the hydraulic cylinder.

By using a double piston type hydraulic cylinder and positioning its tube in the longitudinal direction, the amount of movement associated with opening and closing of the hydraulic hose that supplies hydraulic oil to the hydraulic cylinder can be reduced.

(Embodiment) FIG. 1 is a side view showing an embodiment of crushing*Il according to the present invention, in which a bracket 11 is rotated vertically by a bin 13 on an arm 9 of a working machine (not shown) such as a hydraulic excavator. Mounted so as to be movable, the bracket 11 is adapted to be rotated by means of a hydraulic cylinder 10 via links 14,15. For the bracket 11, the above-mentioned pair of side plates 1. Frame 2 with l rotates with a drive device!
It is rotatably attached via J116. The swing device al16 includes a bracket 11, an outer ring 17 of the body,
It consists of an inner ring 18 rotatably attached to the outer ring 17, and a hydraulic motor 19 that turns the inner ring 1B relative to the outer ring 17 via a gear mechanism (not shown). A rotary joint 20 is attached to the center of the outer ring 17 to supply hydraulic oil to the sleeve pressure cylinder 6A for closing the opening/closing body 3DjI.

The hydraulic cylinder 6A for opening and closing the opening/closing body 3 is a one-piece rod type, and its tube 6a is attached to the top of one of the opening/closing bodies 3 via a bottle 21.
Also in the two examples in which the intermediate part is inserted between the side plates 1 and 1 of the frame 2, and the piston rod 6b is rotatably connected to the upper part of the other opening/closing body 3 by a pin 22, As in the example, a crushing blade 5a and a cutter 5b are provided at the tip of each opening/closing body 3 as crushing blades 5.

23 is a spring device for biasing the opening/closing body provided according to the present invention, and the structure of this device is shown in the side sectional view in FIG. 2, the plan sectional view in FIG. 3, and the left side view in FIG. This will be explained using figures. Between the side plates 100 constituting the frame 2, a horizontal plate 24 and a pair of vertical plates 25 and 26 are attached by welding.
A locking nut 29.30 is attached to one end of each loft 27.28 on opposite sides, and a spring receiver 31.3 provided in Mfs inside each rod 27.28
Pressing springs 33, 34 are provided between the lofts 27.2 and the vertical plates 28.25, and are wound around the rods 27.28.
8 nuts 29.30 are installed on the opposite side (the II ends are installed on the upper part of the opening/closing bodies 3, 3 near the pivot joints, respectively, on the side 3)
a, press against 3a.

According to this configuration, when the opening/closing body 3.3 is in a half-open or fully open state, the push springs 33 and 34 press the receivers of the opening/closing body 3.3 evenly on the left and right sides, so that the first As shown by the two-dot chain line A in the figure, the opening/closing body 3.3 opens in a state in which the left and right sides are balanced with respect to the center line S of the frame 2, and by closing the opening/closing bodies 3, 3, crushing of concrete buildings, etc. When performing this, use the hydraulic cylinder 6
Since the crushing is performed by adding the spring force of the push springs 33 and 34 to the force A, a strong crushing force of 1 is obtained. Furthermore, if there is a difference in resistance to the left and right crushing blades 5 when closing the opening/closing body 3.3, a difference will occur in the amount of closing of the opening/closing body depending on the difference in resistance, and depending on the shape of the part to be crushed. Crushing work will be carried out.

FIG. 5 shows another embodiment of the present invention, in which a double piston type hydraulic cylinder 6B for opening and closing the opening/closing body 3 is used, in which a pair of independent piston rods 6d and ad are provided for the tube 6c. , so that they can come into contact with the left and right sides of the tube 6c and both sides of the side plate l with some play,
A positioning member 35 is provided to position the tube 6c in the longitudinal direction. The tube 6c is provided with a rotation preventing member (not shown) that prevents the tube 6c from rotating about its axis relative to the frame 2.
It is a provision.

By providing such a tube positioning member 35, the tube 6c does not shift from the frame 2 in the longitudinal direction of the tube 6c.

No excessive force is applied to the hydraulic hose (not shown) connected to the tube 6c, and damage to the hydraulic hose is prevented, and the hydraulic hose can be shortened, making it easier to handle the hose.

Further, as in the present embodiment, by forming the surface facing the edge of the side plate l of the first positioning member 35 into an arcuate surface, the fifth
As shown in the figure, the sum of the left and right gaps when the tube 6c is perpendicular to the axis S of the frame 2, and when the opening/closing body 3.3 rotates as shown by arrows e and f, the hydraulic When the cylinder 6B is in an inclined position, the total horizontal distance between the 1 positioning member 35 and the edge of the side plate 1 can be made approximately equal, which allows the positioning of the tube 6c to be performed on the opening/closing body 3.3. The opening/closing operation of each opening/closing body 3.3 is not restricted by the positioning member 35, and when the arcuate surface position contacts the edge of the side plate 1, the two positioning members 3. 35
slides smoothly along the arcuate surface or edge of the

(Effect of the invention) In claim 1, since a spring device is provided between the opening and closing body and the frame to bias the opening and closing body in the closing direction, the left and right opening and closing bodies are balanced by the action of the spring. When opened, the posture of the opening/closing body is stable, and during crushing, the spring action allows the opening/closing body to take a posture according to the shape of the object to be crushed, resulting in flexibility and good workability. .

Further, at the time of crushing, the crushing force by the spring is added to the crushing force by the hydraulic cylinder, and a crushing force greater than that obtained by the hydraulic cylinder is obtained, making it possible to provide a compact crushing device with a large output.

In the second aspect, since the hydraulic cylinder is of a single-lot type, the structure of the cylinder is simplified and costs can be reduced.

In claim 3, each lot is provided with an independent double piston type hydraulic cylinder for opening and closing, and a positioning member is provided in the longitudinal direction of the tube, so that movement of the tube in the longitudinal direction as the opening/closing body is opened and closed is restricted. , No excessive force is applied to the hydraulic hose connected to the hydraulic cylinder, and damage to the hydraulic piping due to movement in the longitudinal direction of the tube is prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a crushing device according to the present invention, FIG. 2 is a side sectional view showing essential parts of the embodiment, FIG. 3 is a plan sectional view of the embodiment, and FIG. Left side view of t52 diagram,
FIG. 5 is a side view showing another embodiment of the present invention, and FIG. 6 is a side view showing a conventional crushing device.

Claims (1)

[Scope of Claims] 1. The intermediate portions of a pair of opening/closing bodies each having a crushing blade are pivotally connected to a frame, and the upper ends of each opening/closing body are connected by a hydraulic cylinder inserted between the pair of side plates to open/close the opening/closing body. A crushing device characterized in that a spring device is provided between the body and the frame to bias the opening/closing body in the closing direction. 2. The crushing device according to claim 1, wherein the hydraulic cylinder is of a single rod type. 3. The hydraulic cylinder is a double piston type cylinder with a pair of independent piston rods, and the hydraulic cylinder is inserted into a pair of side plates constituting the frame so as to be vertically movable, and the hydraulic cylinder is vertically movable in the longitudinal direction of the tube of the hydraulic cylinder. The crushing device according to claim 1, further comprising a device for regulating the position of the crushing device.