JP2004068393A - Dismantling-cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dismantling-cutting machine which prevents a piston rod of an opening/closing cylinder for opening/closing an arm from being damaged by abutting on an obstacle. <P>SOLUTION: According to the structure of the dismantling-cutting machine, a movable bracket 3 having a pair of mutually opposed side plates 6 is rotatably connected to a fixed bracket 1, and an arm pin 8 is arranged between the side plates 6. Then a pair of arms 9a, 9b are openably supported on the arm pin as the center, and cylinder bodies 15 of the opening/closing cylinders 14a, 14b are connected to the arms 9a, 9b, respectively. Further tips of piston rods 19 of the opening/closing cylinders 14a, 14b are connected to the movable bracket 3 which always cover the piston rods 19, and therefore the piston rods 19 are prevented from being damaged by abutting an obstacle during performing dismantling work by opening/closing the arms 9a, 9b. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dismantling and cutting machine used by being attached to the tip of an arm such as a hydraulic excavator.
[0002]
[Prior art]
For indoor renovation of buildings and factories, it has been usual to dismantle indoor ceilings and walls with a demolition cutting machine.
[0003]
As a dismantling and cutting machine used for dismantling dismantled objects, open / close cylinders are connected to each of a pair of arms that can be opened and closed, and the arm is closed by the operation of each open / close cylinder. 2. Description of the Related Art Conventionally, it is known that a dismantled product is cut with a cutting blade formed on a side edge of a cutting mating surface where a pair of arms overlap each other.
[0004]
In the dismantling and cutting machine as described above, normally, a movable bracket is pivotally connected to a fixed bracket that is detachably attached to the tip of an arm of a hydraulic excavator, and the pair of arms can be opened and closed by the movable bracket. The opening and closing cylinder is supported, and the orientation of the pair of arms can be adjusted by rotating the movable bracket.
[0005]
In addition, a rotary joint is attached to the fixed bracket, each of the rotary joint and the opening / closing cylinder is connected by a hydraulic hose, pressure oil is supplied from the rotary joint to each opening / closing cylinder, and the hydraulic hose is twisted by the rotary joint. I try to prevent it.
[0006]
[Problems to be solved by the invention]
By the way, in this kind of dismantling and cutting machine conventionally known, the cylinder body in the open / close cylinder is connected to the movable bracket, and the piston rod is connected to the arm. However, there is a disadvantage in that there is a high risk that the piston rod comes into contact with an obstacle during the dismantling operation and is damaged.
[0007]
An object of the present invention is to provide a small and compact dismantling and cutting machine that can prevent damage to a piston rod of an opening and closing cylinder that opens and closes an arm and that can efficiently perform dismantling work.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a movable bracket is rotatably coupled to a fixed bracket connected to an arm of a construction machine, and an arm pin is provided between a pair of opposed side plates provided on the movable bracket. A piston front chamber of each opening / closing cylinder is connected to each of a pair of crushing / cutting arms supported so as to be freely opened / closed around the arm pin, via a rotary joint attached to the fixed bracket. In the dismantling and cutting machine in which pressure oil is supplied to one of the piston rear chamber and oil is discharged from the other, the cylinder body of each opening / closing cylinder is connected to the arm and the tip of the piston rod is connected to the movable bracket. Connected to each piston rod, the first oil passage communicating with the piston front chamber in the cylinder body, and the piston rear chamber A second oil passage is provided, and the first oil passage is hydraulically connected to a first oil inlet / outlet provided in a rotary cylinder of the rotary joint, and the second oil passage is provided to a second oil inlet / outlet provided in the rotary cylinder. It is connected by a hose, and a configuration is adopted in which the first oil inlet / outlet and the second oil inlet / outlet are formed on the side portions of the rotating cylinder facing the open / close cylinders.
[0009]
As described above, by connecting the piston rod of the opening / closing cylinder to the movable bracket and connecting the cylinder body to the arm, the cylinder body moves axially with respect to the piston rod when the arm is opened / closed by the operation of the opening / closing cylinder. Will move. For this reason, the piston rod is always covered by the movable bracket, and the piston rod can be prevented from colliding with the obstacle and being damaged when the dismantled object is disassembled.
[0010]
Further, a first oil passage communicating with the piston front chamber and a second oil passage communicating with the piston rear chamber are provided on the piston rod of the opening / closing cylinder, and the first and second oils provided in the respective oil passages and the rotary joint are provided. By connecting the entrance / exit with a hydraulic hose, the hydraulic hose is also covered with a movable bracket, so that when the dismantled material is dismantled, the hydraulic hose gets caught in the dismantled material and interferes with the dismantling work. No dismantling work can be performed efficiently.
[0011]
Further, the first and second oil inlets and outlets formed in the rotary cylinder of the rotary joint are provided on the side facing each open / close cylinder, so that the end of the hydraulic hose on the rotary joint side is connected to the rotary cylinder and the open / close cylinder. Since it can fit in between, the compactness of the width dimension between a pair of side plates of a movable bracket can be achieved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 to FIG. 3, the demolition cutting machine according to the present invention has a fixed bracket 1 that is detachably attached to an arm tip of a construction machine such as a hydraulic excavator, and is provided on the fixed bracket 1. A connecting plate 4 provided on the movable bracket 3 is disposed opposite to the support plate 2, and the fixed bracket 1 and the movable bracket 3 are relatively rotatable by a bearing 5 provided between the connecting plate 4 and the support plate 2. It is supported.
[0013]
The movable bracket 3 has a box shape in which a pair of side plates 6 and a pair of end plates 7 are provided on both sides and both ends of the connecting plate 4, and arm pins 8 are provided between the ends of the pair of side plates 6. The rear ends of the pair of arms 9a and 9b are rotatably supported, and the pair of arms 9a and 9b can be opened and closed with the arm pin 8 as a center.
[0014]
A connecting piece 10 is provided on the outside of the pair of arms 9a and 9b. Moreover, the cutting blade 12 is formed in the arm 9a, 9b at the side edge of the mating surface 11 which mutually overlaps in the closed state. Furthermore, a holding portion 13 is provided at the tip of each arm 9a, 9b.
[0015]
Opening and closing cylinders 14a and 14b are connected to the connecting pieces 10 of the pair of arms 9a and 9b.
[0016]
As shown in FIG. 4, the opening / closing cylinders 14 a and 14 b include a piston 16 slidably incorporated in a cylinder body 15 and a piston front chamber 17 and a piston rear chamber 18 provided in the cylinder body 15. A first oil passage 20 that communicates with the piston front chamber 17 and a second oil passage 21 that communicates with the piston rear chamber 18 are provided in a piston rod 19 that is slidably penetrating through the cylinder body 15. The hose connection ports 20 a and 21 a of the paths 20 and 21 are opened at the outer periphery of the tip end portion of the piston rod 19.
[0017]
In the opening / closing cylinders 14 a and 14 b, the mounting piece 22 provided on the head cover side of the cylinder body 15 is connected to the connecting piece 10 of the arms 9 a and 9 b with a pin 23, and the tip of the piston rod 19 is connected to the movable bracket 3. It is connected to a connecting piece 24 provided on the lower surface of the plate 4 by a pin 25. For this reason, when each open / close cylinder 14a, 14b is extended, the cylinder body 15 moves in the axial direction, and in the state where the cylinder body 15 is extended most, the end of the cylinder body 15 on the rod cover side of the movable bracket 3 It is arranged between the opposing side plates 6.
[0018]
As shown in FIG. 2, a rotary joint 26 is supported on the support plate 2 of the fixed bracket 1, pressure oil is supplied into the open / close cylinders 14a and 14b via the rotary joint 26, and the open / close cylinder 14a. , 14b is returned to the tank (not shown).
[0019]
As shown in FIG. 4, the rotary joint 26 includes a joint body 27 and a rotating cylinder 28 that is rotatably provided to the joint body 27, and the joint body 27 is, as shown in FIG. 2, It is attached to the support plate 2 of the fixed bracket 1.
[0020]
As shown in FIG. 4, the joint body 27 is formed with a first passage 29 and a second passage 30, while the rotary cylinder 28 has two first oil inlets 31 that communicate with the first passage 29. Two second oil outlets 32 communicating with the second passage 30 are formed.
[0021]
As shown in FIG. 2, the first oil inlet / outlet 31 and the second oil inlet / outlet 32 are provided on the side of the rotating cylinder 28 facing the open / close cylinders 14 a and 14 b. As shown in FIG. 4, the first oil inlet / outlet 31 and the hose connection port 20a of the first oil passage 20 in the opening / closing cylinders 14a, 14b are connected by a hydraulic hose 33, and the second oil inlet / outlet 32 is opened / closed. A hydraulic hose 34 is connected to the hose connection port 21a of the second oil passage 21 in the cylinders 14a and 14b. Each of these hydraulic hoses 33, 34 forms a loop 34a below the rotary joint 26, and the open / close cylinders 14a, 14b swing around the pin 25 by the expansion / contraction of the open / close cylinders 14a, 14b. When a tensile force or the like is applied to 33 and 34, the tensile force or the like is absorbed by the loop 34a so that an excessive force is not applied to the hydraulic hoses 33 and 34.
[0022]
The demolition cutting machine shown in the embodiment has the above-described structure. When pressure oil is switched and supplied to the first passage 29 and the second passage 30 of the rotary joint 26, the opening and closing cylinders 14a and 14b expand and contract. The pair of arms 9a and 9b are opened and closed by the operation of the cylinders 14a and 14b, and the dismantled object can be grasped and torn or destroyed by the pair of arms 9a and 9b, and cutting is performed by the difference in the cutting blade 12. Work can be done.
[0023]
Here, the open / close cylinders 14a and 14b for opening and closing the pair of arms 9a and 9b are extended because the tip of the piston rod 19 is connected to the movable bracket 3 and the cylinder body 15 is connected to the arms 9a and 9b. Sometimes the cylinder body 15 moves in the axial direction. The end of the cylinder body 15 on the rod cover side is located in the movable bracket 3 with the cylinder body 15 being most extended, and the piston rod 19 is always covered by the movable bracket 3.
[0024]
For this reason, there is no inconvenience that the piston rod 19 comes into contact with an obstacle and is damaged during the dismantling operation.
[0025]
Further, the piston rod 19 is provided with a first oil passage 20 that communicates with the piston front chamber 17 and a second oil passage 21 that communicates with the piston rear chamber 18, and hose connection ports of the first oil passage 20 and the second oil passage 21. Since the hydraulic hoses 33 and 34 connect the first and second oil outlets 31 and 32 of the rotary joint 26 with the hydraulic hoses 33 and 34, the hydraulic hoses 33 and 34 are always covered by the movable bracket 3. Become. For this reason, there is no inconvenience that the hydraulic hose gets caught in the dismantled object during the dismantling work, so that the dismantling work can be performed efficiently and the hydraulic hoses 33 and 34 are prevented from being damaged. Can do.
[0026]
Further, the first and second oil outlets 31 and 32 are provided on both sides of the rotary joint 26 facing the open / close cylinders 14a and 14b, so that the ends of the hydraulic hoses 33 and 34 are opened and closed with the rotary joint 26. The space between the piston rods 19 of the cylinders 14 a and 14 b can be accommodated, and the width dimension between the pair of opposed side plates 6 of the movable bracket 3 can be reduced.
[0027]
In the drawings shown in the embodiment, the arm-shaped dismantling and cutting machine mainly used for cutting work is described. It is what you play.
[0028]
【The invention's effect】
As described above, in the present invention, the piston rod of the open / close cylinder can always be covered by the movable bracket, and therefore, it is possible to prevent the piston rod from coming into contact with the obstacle during the dismantling operation and being damaged.
[0029]
Further, by providing the piston rod of the opening / closing bracket with the first oil passage communicating with the piston front chamber and the second oil passage communicating with the piston rear chamber, each oil passage and the first and second of the rotary joint are provided. The hydraulic hose connecting the oil inlet and outlet can be covered by the movable bracket, and there is no inconvenience that the hydraulic hose gets caught in the dismantled object during dismantling work, and the dismantling work can be performed efficiently. .
[0030]
Further, by providing the first and second oil outlets on both sides of the rotary cylinder of the rotary joint, the end of the hydraulic hose connected to each oil inlet / outlet is disposed on the side of the rotary joint. Further, the width dimension between the pair of opposed side plates of the movable bracket can be made compact.
[0031]
Further, by providing a grip portion at the tip of the arm, it can be easily torn off by grasping a thin object or a reinforcing bar.
[Brief description of the drawings]
1 is a front view showing an embodiment of a demolition cutting machine according to the present invention. FIG. 2 is a vertical front view of the demolition cutting machine shown in FIG. 1. FIG. 3 is a vertical side view of FIG. Sectional view schematically showing the relationship between the rotary joint shown in Fig. 1 and the opening and closing cylinder
DESCRIPTION OF SYMBOLS 1 Fixed bracket 3 Movable bracket 6 Side plate 8 Arm pin 9a, 9b Arm 14a, 14b Opening / closing cylinder 15 Cylinder main body 17 Piston front chamber 18 Piston rear chamber 19 Piston rod 20 First oil passage 21 Second oil passage 26 Rotary joint 28 Rotary cylinder 31 First oil inlet / outlet 32 Second oil inlet / outlet 33, 34 Hydraulic hose

Claims (2)

A movable bracket is rotatably connected to a fixed bracket connected to an arm of a construction machine, an arm pin is provided between a pair of opposed side plates provided on the movable bracket, and the crushing is supported so as to be opened and closed around the arm pin. An open / close cylinder is connected to each of the pair of cutting arms, and pressure oil is supplied to one of the piston front chamber and the piston rear chamber of each open / close cylinder via a rotary joint attached to the fixed bracket, In the dismantling and cutting machine that drains oil from the other side, the cylinder body of each open / close cylinder is connected to the arm, and the tip of the piston rod is connected to the movable bracket, and each piston rod is connected to the front of the piston in the cylinder body. A first oil passage that communicates with the chamber and a second oil passage that communicates with the piston rear chamber; A second oil passage is connected to a first oil inlet / outlet provided in the rotary cylinder of the inlet by a hydraulic hose to a second oil inlet / outlet provided in the rotary cylinder, and the first oil inlet / outlet and the second oil inlet / outlet are connected. A dismantling and cutting machine characterized in that the formation position of the entrance / exit is a side portion of each of the rotary cylinders facing each open / close cylinder. The demolition cutting machine of Claim 1 which provided the holding | grip part which clamps a to-be-disassembled object in each front-end | tip part of the said arm.

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