JPS6351211B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earth and sand transport device mainly for vertical piles, which transports earth and sand by raising and lowering a clamshell suspended by a wire rope wound up by a winch.

Conventionally, this type of earth and sand transport device has a wire rope that is movably strung up and down around a framework of the required height.
One end is fixed to the framework body side, the other end side is wound around the winding drum of a winch device, a clam shell is suspended from the middle part, and the wire rope is suspended along the framework body by winding and unwinding operations of the winch device, After the clam shell is dropped to the ground and the accumulated earth and sand in the excavated area is grabbed, a wire rope is wound up using a winch device to lift the clam shell to the required height, and a hopper (or a transport dump truck) is placed below the clam shell. ) is moved to open the clamshell, the trapped earth and sand is discharged and thrown in, and then the clamshell is lowered again by unwinding the wire rope to grab the earth and sand, and this operation is repeated in sequence. The earth and sand put into the hopper are carried out by a belt conveyor, etc., but the excavated earth and sand is carried out by operating one clam shell using one winch device, which improves work efficiency. In addition, the winch device must lift the clam shell's own weight in addition to the weight of the soil grabbed during the lifting operation of the clam shell, that is, the winding up of the wire rope, and the winch device requires a large driving force and requires a large amount of energy. It was also disadvantageous in terms of savings.

SUMMARY OF THE INVENTION The present invention takes these points into account and provides an earth and sand transporting device that not only improves the efficiency of earth and sand transporting work, but also enables low noise driving, energy saving, and resource saving.

That is, in the present invention, both halves of a wire rope, the middle part of which is wound around the winding drum of a winch device, are wound around a plurality of pulleys disposed on the upper part of a framework of a required height, and the wire rope is With clam shells suspended on both halves, each end is fixed to the frame body, and both halves of the wire rope are alternately wound in opposite directions by rotation of a winch device, and unwound. By doing this, both clam shells are configured to be raised and lowered alternately within the framework, and a belt feeder is provided at a required height of the framework so as to be movable in both directions from an intermediate position of the hoistway of both clam shells. When the clam shell is in a state where the clam shell is in a state where the rising is stopped, by configuring it to reciprocate between the intermediate portion and the hoistway of the clam shell, one of the clam shells is lowered and the other clam shell is raised by one drive of the winch device. In other words, both clam shells alternately grab dirt and discharge the trapped dirt into the belt feeder, which doubles the work efficiency.Also, the rising of the clam shell with dirt and the descent of the empty clam shell is easy. Since these operations are carried out at the same time, the winch device requires a hoisting force corresponding to the weight of the earth and sand and the weight of the clamshell, but the weight of the other clamshell is applied to the unwinding side. Since the weights of both clamshells are added to each other, they cancel each other out, and it is sufficient to have a driving force equivalent to the hoisting force of the weight of the earth and sand alone, making it possible to save energy, and the winch itself is also inexpensive.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a frame body of a required height, support stands 2 and 3 are formed on both sides of the lower part, and a guide frame 4 is horizontally suspended in the middle part in the height direction. A winch device 5 is installed on one support platform 2, and an auxiliary winch device 6 is installed on the other support platform 3, and pulleys 7, 8, and 9 are installed at required positions on the upper part of the framework body 1. The pulley 7 consists of double pulleys 7a and 7b.

That is, the first pulley 7 [7a, 7b] is located above the winch device 5 on one side, the second pulley 8 is located approximately in the center, and the third pulley 9 is located above the winch device 5 on the other side. It is located above the winch device 6.

One end of the wire rope 10 is tied to the upper part of the framework body 1 at a position approximately midway between the first pulley 7 and the second pulley 8, and then attached to one of the pulleys 7a of the first pulley 7. Wind the drum 5 of the winch device 5
a, 5b, then around the other pulley 7b of the first pulley 7, then through the second pulley 8 and around the third pulley 9, and the other end is wrapped around the drum of the auxiliary winch device 6. Can be wrapped around 6a.

A first clamshell 11 is attached between the tied end of the wire rope 10 and one of the pulleys 7a of the first pulley 7, and a second clamshell 11 is attached between the second pulley 8 and the third pulley 9. The second clam shells 12 are each suspended between the two clam shells, and the length of the wire rope 10 is set between one of the clam shells (for example, the first clam shell in the figure).
When one clam shell 11) is in the raised position, the other clam shell (the second clam shell 12 in the figure) is in the lowered position.

Further, a belt feeder 13 is attached to the support guide frame 4 at the intermediate portion of the frame body 1 via a moving device 14 so as to be movable from the center position in the left-right direction, that is, in the direction facing the first and second clam shells 11 and 12. It has been done.

A relay device 16 for winding a signal cable 15 is installed in the upper part of the frame body 1, and the signal cable 15 is connected to each clam shell 11, 12, and is rewound as the clam shells 11, 12 descend, and then raised again. It is wound up accordingly. An opening/closing operation signal is sent to the clamshells 11 and 12 through the signal cable 15, and the clamshells 11 and 12 grab earth and sand and discharge it into the belt feeder 13.

In addition, Clam Ciel 1 is installed in the required parts of the framework body 1.
A switch for a control circuit (described later) for controlling each operation of the belt feeder 1, 12 and the belt feeder 13 is provided.

That is, in the upper half of the framework 1, there is a clam shell 11.
or 12 is raised, and switches S ₁ and S ₂ of a control circuit that turn on close to the belt feeder 13 and stop the clam shell 11 or 12 are arranged, and are located above the switches S ₁ and S ₂ . When the clam shells 11 and 12 are hoisted up to a predetermined position or higher, switches S ₃ and S ₄ are provided which close to the clam shells 11 and 12 and turn off, thereby cutting off the drive power of the winch device 5.

In addition, the support guide frame 4 at the center of the frame body 1 includes a switch S5 for detecting the center stop position of the belt feeder 13, and a switch _S5 for detecting the left and right movement stop positions.
S ₆ and S ₇ are provided, and emergency switches S ₈ and S ₉ are also provided at both left and right ends.

Next, the operation of the apparatus of this example constructed as described above will be explained with reference to FIG.

Now, the operator operates the winch device 5 via the control panel 21 to lower the first clam shell 11 and land it in the earth and sand accumulation pit in the excavation part in the open state (Fig. 4A), and then lower the clam shell 11. 11 closing operation or grasping operation is performed. This closing operation of the clam shell 11 is carried out through the signal cable 15, and the closing operation grabs the earth and sand (FIG. B), and when the clam shell 11 is completely closed,
The winch device 5 is operated to raise this first clam shell 11.

At this time, the second clamshell 12 in the raised position
If the earth and sand have been discharged and the belt feeder 13 has not completed moving to the center of the framework 1, the first clam shell 11 will not be raised, and the belt feeder 13 will be raised when its center position is detected by the switch _S5 . do. That is, in this operation, priority is given to electrically discharging the upper clam shell and moving the belt feeder to the center.

On the other hand, as a result of this lifting operation, the wire rope on which the second clamshell 12 in the raised position is suspended becomes unwound and becomes longer, and the second clamshell 12 is lowered.

In this way, the first clam shell 11 grabs dirt and rises according to the operator's instructions, and when it is raised to the required height, that is, a height close to the switch _S1 , it is stopped by the operation of the switch _S1 . (Figure C). Then, by operating the switch _S1 , the belt feeder 13 is moved to the lower side of the first clam shell 11 and comes into contact with the switch _S6 , completing the movement and stopping (D in the figure).

The first clam shell 1 is activated by this switch S ₆ .
1 is opened, the earth and sand are discharged into the belt feeder 13, and the discharge operation is completed by the operation of the timer 22 (E in the figure).

The earth and sand put into the belt feeder 13 is discharged to the earth and sand hopper 17 and carried out.

After this discharge operation is completed (time up), the belt feeder 13 returns to the center position and the switch is turned off.
It comes into contact with _S5 and stops moving (F in the same figure), and preparations for descending the first clam shell 11 after discharging the earth and sand are completed.

On the other hand, in this state, the second clam shell 12, which is in the lowered position, has completed grasping the dirt in the earth and sand pit and is waiting for an instruction to raise it, and when the operator performs the raising operation, it is raised in the same manner as the first clam shell 11 described above. It is operated (G in the same figure).

By repeating the same operation, the earth and sand in the earth and sand pit is carried out to the outside.

The length of the wire rope 10 is adjusted by winding up and unwinding the auxiliary winch device 6 according to the amount of accumulated earth and sand in the earth and sand pit, and the lifting and lowering strokes of the first and second clam shells 11 and 12 are adjusted.

Also, overload and no-load limit switches S ₉ and S ₁₀ are installed at the end of the wire rope 10 connected to the framework 1.
If the winch device 5 continues to operate even if the clam shell 11 or 12 lands on the dirt pit, it detects a decrease in the tension of the wire rope 10 and stops the clam shell 11 or 12.
Alternatively, if an overload or abnormal tension is applied to the wire rope 10, the winch device 5 is configured to detect the excess tension of the wire rope 10 and stop the winch device 5.

As described above, according to the present invention, two clamshells are raised and lowered alternately by a wire rope whose middle part is wrapped around a winch device and whose two halves are wound up and back down alternately. Since the work is carried out, work efficiency is improved, and the weight of the two clam shells cancels each other out during the carry-out operation.
The power consumption is only the net work of carrying out the earth and sand, making it possible to save energy and resources.Moreover, the clam shell only moves up and down, and the movement of earth and sand is carried out by the horizontal movement of the belt feeder, so there is no vibration, vibration or impact on the framework. It is possible to operate with little noise and low noise, and the only operation required is to grasp and raise the clam shell, and automatic operation is also possible.It is especially suitable for transporting large amounts of earth and sand from shafts of increasing depth. There is no need for a drive mechanism, and a general-purpose product can be used, which has the advantage of reducing manufacturing weight by half and reducing manufacturing costs compared to conventional types.

[Brief explanation of the drawing]

FIG. 1 is a front view of the earth and sand transport device according to the present invention;
FIG. 2 is a circumferential side view, FIG. 3 is a plan view thereof, and FIG. 4 is an explanatory diagram of the operation. In the figure, 1 is a frame body, 5 is a winch device, 6 is an auxiliary winch, 10 is a wire rope, 11 and 12 are clam shells, 13 is a belt feeder, and S ₁ to S ₁₀ are operation limit switches.

Claims (1)

[Scope of Claims] 1. Both halves of a wire rope whose intermediate portion is wound around a winding drum of a winch device are wound around a plurality of pulleys disposed on the upper part of a framework of a required height, and the wire rope is With clamshells suspended from both halves of the wire rope, each end is fixed to the framework, and both halves of the wire rope are alternately wound in opposite directions by rotation of a winch device. By returning the clamshells, the two clamshells are configured to be raised and lowered alternately within the framework, and a belt feeder is provided at a required height of the framework so as to be movable in both directions from an intermediate position in the hoistway of the clamshells. When one of the clam shells is in a rising stopped state, the earth and sand transport device is configured to reciprocate between the intermediate position and a hoistway of the clam shell. 2 At the top of the framework, a first pulley consisting of two pulleys and a second pulley consisting of a single pulley are attached.
and a third pulley, and one half of the wire rope whose middle part is wound around the winding drum of the winch device,
After being wrapped around the first one pulley, it is fastened to the framework body, and one clamshell is suspended between the fastening part and the one pulley, and the other half of the wire rope is A patent in which the other clam shell is suspended between the second pulley and the third pulley by being wound around the first other pulley, the second pulley, and the third pulley in sequence, and then fixed to the framework body. An earth and sand transport device according to claim 1. 3. The earth and sand transport device according to claim 1 or 2, wherein the belt feeder extends in a direction perpendicular to the direction of movement of the belt feeder and protrudes from the frame body.