JPS6250629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for destroying mainly cylindrical concrete structures.

Destruction of concrete structures is necessary when rebuilding a new building or when removing unnecessary parts during construction. Conventional crushers use hydraulic cylinders to swing a rotating arm toward a fixed arm or open and close both rotating arms to destroy the concrete structure sandwiched between the two arms. There is. Although this type of destruction method is convenient for crushing road pavements and walls, if the concrete structure has a special shape, such as a standing column, the column must be sandwiched between both arms and destroyed. There are cases where it is difficult to do so. In addition, when driving concrete piles into the ground as foundation piles for buildings, the pile heads remain on the ground at uneven lengths due to differences in ground hardness and softness at the tip of each pile. In order to combine with the building,
The exposed pile shall be partially destroyed to a uniform length. At this time, with a conventional crusher, it is difficult to sandwich the pile between both arms,
Moreover, the problem arises that the work becomes complicated for vertical piles. On the other hand, there are already existing pile-destroying machines, but these machines are generally hand-held or suspended from a crane, so they have low pile-destroying efficiency, and moreover, they can only partially destroy piles. It is dangerous because there are many opportunities to get close to them. This breaking machine is also insufficient in terms of versatility, as it can only destroy piles with a specific diameter.

The present invention has been proposed to improve the aforementioned problems with conventional concrete crushers and pile breakers. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and apparatus for easily and quickly destroying cylindrical shapes such as concrete columns or piles. Another object of the present invention is to
The objective is to increase versatility by being able to destroy piles of different diameters.

In the present invention, a breaking device having a pair of rotating arms is used, and means for opening and closing both rotating arms include a hydraulic cylinder, a hydraulic motor, and the like. Both rotating arms do not destroy cylindrical structures such as concrete columns or piles by themselves, but they clamp and fix the structures, and remain stationary when the rod of the destructive hydraulic cylinder is extended. . Therefore, the hydraulic cylinders for opening and closing the two pivot arms do not have to be of large capacity; instead, the small capacity hydraulic cylinders have separate fixing means. By adjusting the opening/closing means used in the present invention, both pivot arms can be fixed in any open/closed state, thereby making it possible to destroy cylindrical structures of different diameters. At this time, the breaking chisel should preferably point towards the center of the cylindrical structure so that breaking can be carried out efficiently, so it is preferable that each breaking hydraulic cylinder be swingable.

Next, the present invention will be explained based on the drawings. Fig. 1 shows a breaking device 2 according to the present invention. The breaking device 2 has a pair of pivoting arms 4, 4, which are connected by pins 5 to support plates 6, 4, as shown in FIG.
It is pivotably mounted between 6 and 6. The substantially rectangular planar support plates 6, 6 are normally positioned horizontally in order to position the pivoting arms 4, 4 to facilitate clamping of generally vertically installed piles and the like. Behind the support plate 6, a pair of brackets 7, 7 are attached to the support plate.
is mounted at right angles, and the bracket has pin holes 8, 8 for mounting the breaking device 2 on a suitable self-propelled truck. The angle of this bracket with respect to the support plate 6 may be changeable so that the column can be destroyed at a special location. Between the support plates 6 and 6, there are pins 5 and 5.
Regulating plates 9 and 10 are fixed in parallel near the. One regulating plate 9 is connected to both rotating arms 4, 4 as shown in the figure.
The other regulating plate 10 defines the minimum opening of both rotating arms 4, 4. Further, both rotating arms 4, 4 require an opening/closing means for turning, and as this opening/closing means, for example, a double-acting hydraulic cylinder 12 or a hydraulic motor (see FIGS. 10 and 11) may be used. . Since the hydraulic cylinder 12 is pivoted between the rear ends of both rotating arms 4, 4, almost the entirety thereof is located between the support plates 6, 6.

As shown in FIG. 1, both pivot arms 4,4 usually have the same curved plane and are arranged opposite each other in order to clamp the cylindrical structure. Each rotating arm 4
In this case, only the portion where the normally double-acting destructive hydraulic cylinder 14 is installed protrudes radially outward. In the drawing, two hydraulic cylinders 14 are installed on one rotating arm 4, but the number of hydraulic cylinders to be installed may be one or three or more. Each hydraulic cylinder 14 is arranged toward the center of the circle at approximately equal intervals in the circumferential direction, and when two cylinders are installed on each rotating arm 4, the hydraulic cylinders 14 are usually located at the front and rear ends of the rotating arm 4. Place it in the section. The rotating arm 4 in FIG. 1 consists of a pair of plates 4a and 4b of the same shape spaced apart in the vertical direction (see FIGS. 3 and 4), and a hydraulic cylinder 14 is placed between the two plates. However, the hydraulic cylinder may be mounted on a single-plate rotating arm.
Each hydraulic cylinder 14 is swingably attached to the rotating arm 4 with a pin 16 at the rear end of the tube.
And a chisel 18 is attached to the rod tip of the hydraulic cylinder.
be fixed in a replaceable manner. The shape of the chisel 18 has a wide point with a generally triangular cross section, as shown in FIGS. 3 and 4, for example.

The swingable design of each hydraulic cylinder 14 is intended to ensure that the chisel 18 points as far as possible toward the center of the cylindrical structure to be destroyed, even if the diameter of the structure is different. A device for securing the hydraulic cylinder 14 in position is illustrated in FIGS. 3 and 4. In FIG. 3, a bracket 20 is fixed to the front end of the cylinder tube, and the bracket is provided with a vertical through hole 22.
Through holes 24 are also provided in the plates 4a and 4b of the rotating arm 4. A plurality of through holes 24 are provided at equal intervals on the circumference around the pin 16 (FIG. 1).
By inserting and tightening the bolts 26 into the predetermined through holes 24 and 22, the hydraulic cylinder 14 can be fixed at a predetermined position.
It is only necessary to change the through hole 24 into which the . On the other hand, in FIG. 4, a bracket 28 is fixed to the front end of the cylinder tube, and a locking part 30 with a rectangular wave-like side surface is formed on the upper and lower peripheral ends of the bracket, and the inner surface of the plates 4a and 4b of the rotating arm 4 is A locking portion 32 having a rectangular wave-like side surface is fixed to each side. The locking portions 30 and 32 have the same shape, and the axis of their grooves passes through the center of the pin 16. In this variant,
Part or all of the plate 4a of the rotating arm 4 must be removable. After releasing the plate material 4a, turn the hydraulic cylinder 14 to engage the lower locking parts 30 and 32 at a predetermined position, and then release the plate material 4a.
A is fixed in a horizontal position, and the upper locking parts 30, 3
All you have to do is engage 2.

In order to fix the cylindrical structure to be destroyed after clamping the two rotating arms 4, 4, the opening/closing hydraulic cylinder 12 is designed to have a larger capacity than each of the destructive hydraulic cylinders 14, or Both rotating arms 4, 4
It is necessary to install a device for fixing. An example of such a fixing device is shown in FIG.
The device consists of a set of disks 34, two each mounted on both support plates 6. The disk 34 has a curved and elongated planar shape, and through holes 36 similar to this planar shape are provided symmetrically about the vertical center line at approximately the horizontal center of the support plate 6, and the disks 34 are bolted to each of the through holes. (See Figure 6). Furthermore, since each disk 34 has one circular hole 38, when the pin 40 is inserted into the circular holes 38, 38 located coaxially in both support plates 6 and tightened, the rotation of both rotating arms 4, 4 is restricted. can. Therefore, the insertion of the pins 40, 40 is necessary for both rotating arms 4, 4
must be performed after clamping the cylindrical structure. By preparing a plurality of sets of disks 34 having circular holes 38 in different positions, it becomes possible to fix both rotating arms 4, 4 at different opening positions. Moreover, if this disk is formed to be more horizontally elongated, only one of each support plate 6 needs to be bolted, and in this case, two circular holes are provided in the disk at a predetermined interval.

FIG. 7 shows another fixing device, which consists of a stop 42 of approximately rectangular plane. stoppa 4
2 has a large diameter upper part 44 as shown in FIG.
A smaller diameter fitting part 4 located below the upper part
6, 48, and the intermediate portion 5 located between the two fitting portions.
Consists of 0. Through holes 52, 52 are provided approximately in the center of both support plates 6, and the planar shape of the through holes is approximately the same as that of the stopper fitting portions 46, 48. When the stopper 42 is inserted into the through hole 52 of the support plate 6 from above, the stopper stops in the state shown in FIG. Perform after clamping the structure. Sustopper 4 with different widths of intermediate portion 50
If a plurality of sets of 2 are prepared, both rotating arms 4, 4 can be fixed at different opening positions. On the other hand, FIG. 9 shows yet another fixing device, which consists of a curved plate 54 with through holes at both ends. In the case of this plate, through holes are also provided at the front ends of both rotating arms 4, 4, and after the cylindrical structure to be destroyed is clamped, the plate 54 is inserted into both through holes through pins 56, 56. Install. By changing the length of the plate 54, both rotating arms 4, 4 can be fixed at different opening positions.

10 and 11 show both rotating arms 4,
4 shows a modification of the opening/closing means of No. 4. Both rotating arms 4,
Nut members 58, 58, one of which has a right-hand thread and the other a left-hand thread, are each pivotally attached to the rear end of the 4, and a double-threaded bolt 60 is screwed into both nut members to connect them. The double-threaded bolt 60 is preferably positioned horizontally, and a cylindrical worm wheel 62 is fixed to the center thereof. On the other hand, a hydraulic motor 64 is fixed between the brackets 7, 7, and a cylindrical worm gear 66 is fixed to the rotating shaft of the motor. Worm gear 66
extends below the support plate 6 along the vertical center of the support plate, and is rotatably supported by a bearing 68. The worm gear 66 meshes with a worm wheel 62 that protrudes from a vertical hole 70 in the lower support plate 6. When the worm gear 66 is rotated by the hydraulic motor 64, the two rotating arms 4, 4 are opened and closed via the worm wheel 62, the double threaded bolt 60, and the nut members 58, 58. If the rotation of the hydraulic motor 64 in one direction opens the two pivot arms 4, 4, then the two pivot arms 4, 4 can be closed by rotating the hydraulic motor 64 in the reverse direction. By using this opening/closing means, both rotating arms 4, 4 can be fixed at any opening position as long as the hydraulic motor 64 is stopped, so there is no need for fixing means as shown in FIGS. 5 to 9. become.

The breaking device 2 according to the present invention is mounted on a self-propelled truck such as a power shovel 72 as shown in FIG. 12, and the hydraulic cylinders 12 and 14 are generally driven by the hydraulic power source of the self-propelled truck. Such a self-propelled cart may be a bucket hoe, a forklift truck, or the like. The breaking device 2 is connected to the arm 7 of the power shovel 72 via the bracket 7.
4 and cylinder rod 76, the support plate 6 and both pivot arms 4, 4 are normally located horizontally. This allows vertically installed cylindrical structures of any diameter, such as concrete piles 7
8 can be easily clamped. At this time, first, by expanding and contracting the rod of the hydraulic cylinder 12, both rotating arms 4, 4 are rotated to clamp the pile 78, and then,
The rotating arm is fixed, and then each hydraulic cylinder 1
The pile 78 can be broken by each chisel 18 by extending the rods 4 and 4. When the pile 78 is gradually destroyed downward from the upper end, the reinforcing bars 80 can be exposed. In addition, when the lower end of the pile 78 protruding above the ground is destroyed first, it is recommended to cut the reinforcing bars while clamping the upper part of the pile with the destruction device 2, as shown in Fig. 12, for safety reasons. This is preferable, and the upper part of the pile can be transported to a predetermined location after the reinforcing steel is melted.

By using the destruction device according to the present invention, it is possible to easily destroy a vertically installed cylindrical structure, and since the destruction device is mounted on a self-propelled cart, it can be moved quickly, which is advantageous in terms of destruction efficiency. It is. If the destruction device is mounted on a self-propelled trolley, the chances of getting close to a partially destroyed structure are reduced, which is also advantageous in terms of the safety of the destruction work. According to the invention:
Since cylindrical structures of different diameters can also be destroyed, there is no need to prepare separate destruction devices for each different diameter, and there is also the advantage that the cost of machinery and equipment required for destruction work can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a horizontal cross-sectional view showing the destruction device according to the present invention with the upper support plate removed, Fig. 2 is a side view of the destruction device shown in Fig. 1, and Fig. 3 is a fixed oscillation of the destruction hydraulic cylinder. 4 is a partial sectional view showing a modification of the swing fixing device, FIG. 5 is a partial front view showing the fixing device for both rotating arms, and FIG. 6 is a partial sectional view showing the front of the device. Fig. 7 is a partial plan view showing a modified example of the fixing device, and Fig. 8 shows a state in which the stopper used in the fixing device of Fig. 7 is attached to the support plate. 9 is a plan view showing a separate fixing device in a rotating arm different from that shown in FIG. 1, and FIG. FIG. 11 is an enlarged sectional view showing the main parts of the opening/closing means shown in FIG. 10, and FIG. 12 is a side view showing the breaking device of the present invention mounted on a power shovel. . 2... Destruction device, 4, 4... Rotating arm, 6...
...Support plate, 7...Bracket, 12...Hydraulic cylinder for opening/closing, 14...Hydraulic cylinder for destruction, 16
...Pin, 18...Chisel, 72...Power shovel.

Claims (1)

[Claims] 1. By mounting the cylinder on a self-propelled trolley and driving each cylinder etc. with its hydraulic power source, the cylindrical structure can be easily moved to a desired position, and it can be moved remotely from the self-propelled trolley. This is a construction method in which a cylindrical structure is destroyed by manipulation, and is carried by a self-propelled cart towards the cylindrical structure with both rotating arms open, then closed and placed at any position. The cylindrical structure with different diameters is completely or partially sandwiched by being stationary and fixed, and then the chisel of the breaking hydraulic cylinder attached to the rotating arm is placed at a position approximately perpendicular to the axis of the cylindrical structure. A method for destroying a cylindrical structure, characterized in that the cylindrical structure is destroyed from the outside by a chisel at the tip of the rod, regardless of the difference in outer diameter. 2. The destruction method according to claim 1, wherein the chisel of each destruction hydraulic cylinder is directed as far as possible to the center of the cylindrical structure to be destroyed, even if the diameter of the structure is different. 3. A support plate made of plate material having a substantially rectangular plane and having substantially the same shape on the top and bottom, a bracket attached to the rear of the support plate at right angles to the support plate in order to be mounted on a self-propelled trolley, and a rear end between the support plates. A pair of curved planar rotating arms made of plate materials having substantially the same shape on the upper and lower sides, and a pair of rotating arms arranged between the upper and lower support plates and pivoted between the rear ends of both rotating arms. A hydraulic cylinder for opening/closing, a hydraulic cylinder for destruction installed between the upper and lower plates of the rotating arm, and a hydraulic cylinder for destruction so as to be approximately perpendicular to the axis of the cylindrical structure to be destroyed in each hydraulic cylinder for destruction. A device for destroying a cylindrical structure, comprising: a chisel for disposing. 4. The breaking device according to claim 3, wherein the opening/closing hydraulic cylinder is fixed by a set disk fitted into the support plate, a substantially rectangular planar stopper, or a curved plate attached between the front ends of both rotating arms. . 5. The breaking device according to claim 3, wherein the chisel fixed to the tip of the rod of the breaking hydraulic cylinder has a substantially triangular cross section and a wide tip.