JPH0137909Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the actuation of a cylinder device that connects a boom equipped with a breaker body at the tip to a fluid pressure source provided on the car body, which is movable by means of a traveling device. The present invention relates to an improvement in a control operation device for a cylinder device for raising and lowering a boom in a breaker mounted rotatably up and down.

The above-mentioned breaker is designed so that the operator controls the running of the vehicle by holding the left and right control handles that protrude from the rear of the vehicle, and the breaker is supported by the tip of a boom mounted on the vehicle body. In order to position the breaker body at the designated location for chiseling work, it is necessary to take your hands off the left and right control handles when controlling the vehicle body and raising and lowering the boom. There is a problem that this operation becomes difficult.

As a means of controlling other devices while holding the steering wheel, the grip on the steering wheel is rotatable, and the grip is connected to the fuel control valve of the engine with a wire, so that the fuel control valve can be controlled by rotating the grip. Means for adjusting the opening degree are known.
However, the control to raise and lower the breaker boom is to switch the control valve of the cylinder device for raising and lowering the boom into three ways: "raise", "neutral", and "lower", and the grip is rotated in one direction. It is not possible to apply a method in which the opening degree of the fuel control valve is increased by repeated operations, and when the rotation operation is released, the grip is returned to the previous position by a spring, thereby narrowing the opening degree of the fuel control valve. First, there is a problem in that control by rotating this conventionally known grip cannot be performed.

The present invention was devised to solve these problems, and allows the operator to use a cylinder device for raising and lowering the boom mounted on the vehicle body while grasping the grip of the control handle provided on the vehicle body. The purpose of this invention is to propose a new means that can switch the control valve in three ways: ``up'', ``neutral'', and ``down''.

In the present invention, as a means to achieve this objective, a boom equipped with a breaker main body at the tip of a vehicle body that is movable by a traveling device is connected to a fluid pressure source provided on the vehicle body. In a breaker that is mounted so that it can be raised and lowered by a cylinder device, the vehicle body is provided with a control handle that protrudes rearward, a grip provided on the control handle is rotatable, and one end of a connecting wire is connected to the grip. The intermediate part of the connecting wire is wrapped around a pulley that is fixed and pivoted on the vehicle body, and is folded back toward the grip, and the other end of the folded wire is connected to the grip so that it can rotate freely in an endless manner. The present invention proposes a control operation device for a cylinder device for raising and lowering a boom in a breaker, which is constructed by connecting an operating rod of a control valve for switching the cylinder device between "raise", "neutral", and "down" in the middle of the wire.

Next, an example of implementation will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a vehicle body which is movable by a traveling device 2, and is formed in the shape of a trolley.

The traveling device 2 includes left and right front wheels 2 mounted as idle wheels on the front end (left end in the figure) of the vehicle body 1.
0, 20, and left and right rear wheels 21, 21 provided as free wheels on the bottom surface of the rear end side of the vehicle body 1.

Reference numeral 3 denotes a power unit mounted on the upper surface of the vehicle body 1, which in this embodiment includes an engine 30, a hydraulic pump 31 driven by the engine 30, and an oil containing oil used in a hydraulic circuit connected to the hydraulic pump 31. This is a hydraulic power unit consisting of a tank 32 and a control valve device 33 that controls the flow of oil in the hydraulic circuit, but there is a pneumatic power unit that combines the engine 30 with a compressor, a control valve device, and an accumulator. It may be configured as a power unit.

Reference numeral 4 denotes a cover that surrounds the power unit 3 and is integrally connected to the vehicle body 1 to form a machine frame. On the rear side of the cover, there are left and right control handles 11 and 12 that protrude rearward. is installed.

Reference numeral 5 denotes a boom that supports the breaker main body 6 at its tip, and the base end side of the boom is formed into a pair of arm parts 50, 50 that expand left and right in a bifurcated shape in a plan view; The base end portions of 50 and 50 are respectively pivotally supported via a support shaft 51 to the left and right side walls 40 and 40 of the cover 4 of the power unit 3, which is also formed as the machine frame, so that the base end portions are attached to the vehicle body 1. A cylinder device 70 for lifting and lowering the boom 5 is installed between the longitudinal direction of the arms 50, 50 and the vehicle body 1, and a support shaft is provided at the tip of the boom 5. A cylinder device 71 for raising and lowering the breaker body 6 is connected between the boom 5 and a connecting portion provided on the upper part of the breaker body 6 which is pivoted by a shaft 52 .

The cylinder devices 70 and 71 are respectively connected to a hydraulic circuit controlled by the control valve device 33 of the power unit 3 via hydraulic hoses connected to connection ports provided therein.

The breaker body 6 is of a conventionally known type in which a chisel 60 is held at the distal end of the breaker body so as to be able to move in and out, and a piston for moving the chisel 60 in and out is housed in the inner cavity of the body.
The piston is connected to a connection port provided in the hydraulic circuit of the hydraulic pump 31 via a rubber hose, and the piston strikes the chisel 60 at high speed by controlling an automatic switching valve installed in the body.

a is a cylinder device 70 for raising and lowering the boom 5;
The grip 81 of one of the left and right control handles 11 and 12 is made rotatable, and the grip 81 is integrally mounted as shown in FIG. A connecting metal fitting 82 that rotates is attached, one end 83a of the connecting wire 83 is connected to the connecting metal fitting 82, and the middle part of the connecting wire 83 is wound around a pulley 84 that is fixed in position and pivoted on the vehicle body 1. Then, the other end 83b is folded back toward the grip 81, and the folded other end 83b is provided with a phase difference of 180 degrees from the aforementioned one end 83a in the rotation direction of the connecting fitting 82. and connect,
Further, in the middle of the connecting wire 83, there is an operating rod 86 whose base end is pivotally supported with respect to the vehicle body 1 by a fulcrum shaft 85.
The rotating end of the operating rod 86 is connected to the valve rod 80a of the control valve 80, and a connecting rod 87 is connected to the valve rod 80a of the control valve 80.
It is constructed by connecting through. As shown in FIG. 6, the control valve 80 has three positions: a "raise" position for rotating the boom 5 upward, a "neutral" position, and a "lower" position for rotating the boom 5 downward. The valve lever 80a has springs 88 and 89 acting in the forward and reverse directions to return it to the "neutral" position.

Further, reference numeral 90 denotes a grip provided on the protruding end of the other operating handle 12, which is rotatable like the grip 81, and is an operating means configured similarly to the operation control device a described above. A control valve of a cylinder device 71 for up-and-down rotation is operated.

In the illustrated embodiment, reference numeral 91 is an operating lever provided in parallel with the grip 81 of the control handle 11, and is connected via a connecting wire to a control valve that controls on/off operation of the breaker body 6. There is. In addition, 92 is the control handle 11
, an accelerator lever provided to control the fuel supply valve of the engine 30 of the power unit 3; 93 a brake lever provided on the control handle 12; 94 a battery; and 34 a fuel tank for storing fuel for the engine 30.

Next, to explain the function and effect, the control operating device for the cylinder device for lifting and lowering the boom in the breaker according to the present invention, which is constructed as described above, is operated by pressing the grip 81 of the operating handle 11 provided on the body of the breaker in a clockwise direction as shown in FIG. When the grip 81 is rotated counterclockwise, the connecting wire 83 moves in the direction of arrow A in FIG. 5, moving the control valve 80 to the "up" position. When the control valve 80 is moved to the "down" position by moving in the direction of arrow B in Figure 5, and the force to rotate it clockwise or counterclockwise is released, the springs 88 and 89 restore it to the "neutral" position. By rotating the grip 81 in the forward and reverse directions and releasing it, the control valve 80 can be reliably switched between the three positions. Therefore, the boom 5 can be raised and lowered while gripping the control handles 11 and 12 and operating the aircraft.
Chiseling work is facilitated while moving the breaker body 6 to a desired location.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a breaker capable of implementing the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of the same, Fig. 4 is a partially longitudinal side view of the power unit section of the above, Figure 5 is an explanatory diagram of the main parts of the same as above, and Figure 6
The figure is an explanatory diagram showing control valves using symbols. Explanation of drawing symbols, 1... Vehicle body, 11, 12...
Control handle, 2... Traveling device, 20... Front wheel,
21... Rear wheel, 3... Power unit, 30...
Engine, 31... Hydraulic pump, 32... Oil tank, 33... Control valve device, 34... Fuel tank, 4... Cover, 40... Side wall, 5... Boom, 50... Left and right arms, 51... Support shaft, 52...
... Support shaft, 6 ... Breaker body, 60 ... Chisel, 70, 71 ... Cylinder device, a ... Operation control device, 80 ... Control valve, 80a ... Valve rod, 81
... Grip, 82 ... Connecting metal fitting, 83 ... Connecting wire, 84 ... Pulley, 85 ... Fulcrum shaft, 86
... Operating rod, 87 ... Linking rod, 88, 89 ... Spring, 90 ... Grip, 91 ... Operation lever, 9
2...Accelerator lever, 93...Brake lever, 94...Battery.

Claims (1)

[Scope of utility model registration request] A breaker is mounted on a car body that is movable by a traveling device, and a boom, which is equipped with a breaker body at the tip, can be raised and lowered by a cylinder device connected to a fluid pressure source provided on the car body. is provided with a control handle that projects rearward, a grip provided on the control handle is rotatable, one end of a connecting wire is connected to the grip, and the intermediate part of the connecting wire is fixed in position to the vehicle body. The wire is wrapped around a pulley that is supported by a shaft, and folded back toward the grip, and the other end of the folded back is connected to the grip so that it can rotate endlessly. A control operation device for a cylinder device for raising and lowering a boom in a breaker, which is made by linking the operating rod of a control valve that switches to “down”.