JPH04250224A - Device for preventing earth and sand from dropping in earth and sand discharging system - Google Patents

Abstract

PURPOSE:To ensure the safety of workers during maintenance by detachably installing an air bad in a hopper, installing an air supply/discharge port at its one end, and installing a lifting lug at the other end. CONSTITUTION:An air bag body 7 made of a flexible material is detachably installed to prevent earth, sand, and stones from dropping to the work site during the work for changing the liner at the lower part of hopper 3 or the maintenance work of vibration feeder 5 and belt conveyor 4. At the lower end of the body 7, an air supply/discharge port 9 is disposed to supply compressed air. At the upper end, a lifting lug 12 is installed to suspend the air bag body 7 by a crane truck 10 via a rope 11. This constitution eliminates the work for removing earth, sand, and stones during maintenance work such as work for changing of liner and ensures the safety of workers.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a device for preventing the fall of sediment in a device for discharging earth and sand, and more particularly to a device for preventing the fall of sediment that can effectively prevent the fall of soil and stones discharged from a hopper. .

0002

[Prior Art] Conventionally, when a mountain, hill, etc. is cut down and the earth and sand is transported to another location by boat or the like for use, the earth and sand is transported from a stocking location to a loading pier by a belt conveyor, and then transported to a shipping pier. The method used is to load the cargo into a container and transport it to another location. By the way, the place where the earth and sand and stones are loaded onto the belt conveyor from the stock place is as shown in FIG. They are dropped onto a belt conveyor 4 installed below the ground via a vibrating feeder 5 provided at the outlet of the hopper 3, and are sequentially conveyed.

[0003]However, as shown in the figure, worker W enters and performs the above-mentioned replacement of the liner at the bottom of the hopper 3 and maintenance of the vibrating feeder 5, belt conveyor 4, etc. The earth and sand piled up on top fell into the hopper 3 several meters below, and the worker W
There was a great risk of injury.

0004

[Problems to be Solved by the Invention] For this reason, conventionally, before maintenance work is performed, the earth, sand and stones 1 piled up on the ground G are removed to a level below the height of the upper edge of the hopper 3, that is, as shown in the figure. It must be removed by bulldozers, dumpers, etc. until it reaches the condition described in 3.1a.
There was a problem in that the removal work required a lot of time and effort, and also cost a huge amount of money.

[0005]

Purpose of the Invention The present invention has been devised in view of the above-mentioned problems in the prior art. The purpose of the present invention is to provide a device for preventing falling of sediment in a device for discharging sediment, which can omit removal work, ensure worker safety, save a lot of effort and time, and reduce costs. It is something.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a removably installed air bag body made of a flexible material inside a hopper, and the air bag body The gist is that it has a substantially cylindrical shape that is smaller than the diameter of the mouth and larger than the diameter of the discharge port, and has an air supply/discharge port at one end and a lifting fitting at the other end. It is something to do.

[0007]

Effect of the Invention The present invention is constructed as described above, and when the liner at the bottom of the hopper is replaced or the vibrating feeder or belt conveyor is maintained, the inside of the hopper is
Since the airbag body is fitted and installed, dirt and stones will not fall into the worker's work area, making it possible to work safely and eliminating the need to remove dirt and stones. It is possible.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the other configurations are the same as those of the first embodiment, so the same reference numerals are given and the explanation will be omitted. FIG. 1 shows a cross-sectional view of the earth and sand falling prevention device embodying the present invention, and 2 is a stocking location for earth and sand, dirt and stones 1 piled up on the ground G, and this stocking location 2 includes: A hopper 3 is installed, and a discharge port 3 of this hopper 3 is installed.
A vibrating feeder 5 is installed at the bottom of a, and further below the vibrating feeder 5, a belt conveyor 4 is installed in a substantially horizontal state for transporting earth, sand, and stones 1 to the next process.

[0009] In the hopper 3, dirt and stones 1 fall onto the work site when the worker W is working to replace the liner at the bottom of the hopper 3 or when performing maintenance work on the vibrating feeder 5 and the belt conveyor 4. An air bag main body 7 made of a flexible material is removably installed to dam the earth, sand, and stones 1 into the hopper 3 to prevent it from occurring. The air bag main body 7 has a substantially cylindrical shape that is smaller than the diameter of the input port of the hopper 3 and larger than the diameter of the discharge port 3a, and a pipe for supplying compressed air is provided at the lower end of the air bag main body 7. A supply/discharge port 9 connectable to a rubber hose 8 is provided, and a lifting fitting 12 is provided on the upper end side to be suspended by a crane vehicle 10 via a rope 11.

[0010] The airbag main body 7 also has the function of preventing external injuries.
In order to maintain airtightness, it is made of reinforcing materials such as rubber or resin film materials and tire cords, and is easily damaged even if it comes into contact with the inner wall surface of the hopper 3 or accumulates earth, sand, and stones 1. It is constructed so that it does not come off. Next, to explain how to use this air bag body 7, before the worker W enters the hopper 3 when replacing the liner at the bottom of the hopper 3 or during maintenance work on the vibrating feeder 5 and belt conveyor 4, 1, the airbag main body 7 is suspended by the crane truck 10 via the rope 11 without removing the earth, sand and stones 1 piled up on the ground G, and is fitted into the hopper 3. Attach it together.

From this state, a pipe 8 for supplying compressed air, which is piped from outside the mine, is connected to the supply/discharge port 9 provided at the lower end of the airbag body 7, and the airbag body 7
Air is supplied until the internal pressure reaches a maximum of 0.5 kgf/cm2. When the air supply is completed as described above, the valve installed in the middle of the pipe 8 or the rubber hose is tightened, the pipe 8 is removed, and as shown in Figure 2, the worker W enters and performs the work of replacing the liner and vibration. Feeder 5, belt conveyor 4
maintenance work is carried out. In this way,
When the specified maintenance work is completed, first remove the compressed air from the airbag body 7 by performing the operation opposite to the above.
Then, the airbag body 7 is lifted up by the crane truck 10 via the rope 11, and the work is completed.

As described above, the worker W enters the lower part of the hopper 3 and performs the liner replacement work and the vibrating feeder 5,
When performing maintenance work on belt conveyor 4,
The airbag body 7 completely seals and closes the opening of the hopper 3, and the falling earth, sand, and stones 1 are dammed up between the airbag body 7 and the inner wall of the hopper 3, so the worker W can feel safe. Not only can you work with care, but you can also avoid ground G when working.
Since there is no need to remove the earth, sand, earth and stones 1 piled up on top, much effort and time are not required, and a large amount of work cost can be reduced.

By attaching a compressed air supply/exhaust pipe and a rubber hose 8 to the air bag body 7, it is possible to remotely check the degree of closeness between the air bag body 7 and the inner wall surface of the hopper 3 during maintenance work. The internal pressure can be adjusted to about 0.1 to 0.5 kgf/cm2, and even if the airbag body 7 is buried with dirt and stones 1 after the work is completed, By releasing the pressure inside the airbag main body 7, the volume can be reduced and it becomes possible to easily lift the airbag.

[0014]

[Effects of the Invention] As described above, the present invention includes a removably installed air bag body made of a flexible material inside a hopper, and the air bag body has a diameter smaller than the diameter of the input port of the hopper. The liner at the bottom of the hopper can be replaced because it has a substantially cylindrical shape that is larger than the diameter of the discharge port, and has an air supply and discharge port at one end and a lifting fitting at the other end. During maintenance of vibrating feeders, belt conveyors, etc., the work of removing earth, sand, and stones can be omitted, ensuring worker safety, and
This saves a lot of effort and time, and also has the effect of reducing the huge cost of removing earth, sand, and stones.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an earth and sand fall prevention device embodying the present invention.

FIG. 2 is an explanatory diagram showing the airbag body when in use.

FIG. 3 is a sectional view of a conventional earth and sand discharge device.

[Explanation of symbols]

1 Sediment, soil and stones
2 Stock location, 3 Hopper
3a Discharge port 4 Belt conveyor
5 Vibration feeder 7 Air bag body 8 Pipe and rubber hose 9 Supply/discharge port
12 Lifting fittings G Ground

Claims (1)

[Claims] Claim 1: Earth and sand piled up on the ground are dropped through a hopper buried in the ground onto a carry-out conveyor installed horizontally at the discharge port of the hopper, and are sequentially carried out to the process. In the sediment discharge device, an air bag body made of a flexible material is removably installed inside the hopper, and the air bag body is smaller in diameter than the input port of the hopper and is Earth and sand discharge device for earth and sand, characterized in that it has a substantially cylindrical shape larger than the diameter of the outlet, has an air supply/discharge port at one end, and has a lifting fitting at the other end. type fall prevention device.