JP2001225818A - Unsealing device for bottom of bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust from scattering by using a means for cutting a bottom by heat when a bottom of a bag housing a powder such as cement is to be unsealed. SOLUTION: Heating wires 11, 11a for controlling power supply are provided in a cross above a hopper 10, and the bottom 2 of the bag 1 is brought into contact with the wires to cut the bottom 2 by the heat of the wires 11. In unsealing the bag 1, the bag is suspended via a sling 3 by a hanging device and stopped in a suspended state, and the bottom 2 is cut, so that contents can be discharged from the bag 1 toward the hopper 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for taking out cement or the like contained in a bag made of a thermoplastic resin material such as a plastic bag, and more particularly, to a device in which a heating wire is arranged above a hopper. And a device for taking out from a bag.

[0002]

2. Description of the Related Art When constructing a building on soft ground, means for improving the ground by mixing a solidifying agent or the like into the soil of the ground to strengthen the foundation of the building is used. In the ground improvement work, by using a screw-shaped excavator, mixing a solidifying agent into the soil excavated by the screw, by building a number of ground improvement piles of a predetermined diameter, the ground improvement pile of building by the ground improvement pile We are trying to get support. Further, as a solidifying agent used for the ground improvement pile, cement and the like are often used, and the cement may be mixed into the soil as powder, but may be mixed with soil excavated by injecting cement milk. In many cases, soil improvement piles are constructed by solidification. Then, the solidifying agent is mixed with the excavated soil to construct a columnar ground improvement pile, for example, it is possible to construct a long pile that penetrates the soft ground and penetrates to the lower hard stratum, Even when a short pile that does not penetrate into the hard ground is constructed, it is possible to improve the support strength of the soft ground and the support strength of the building by using the frictional action of the short pile on the ground.

[0003]

In handling a solidifying agent such as cement, a cement milk plant or the like used in civil engineering works, for example, puts about 1 ton of cement into a large capacity bag made of plastic such as vinyl chloride. Is used. When transferring the bag containing the large amount of cement to the hopper of the plant, the bottom of the bag is lifted with a device such as a crane and held on the hopper, and the bottom of the bag is knives or other cutting tools. A method of cutting open and dropping cement is used. However, in the operation of cutting the bottom of a bag containing extremely fine powder such as the cement, the worker may directly be exposed to the falling cement, and there is a problem that the workability is not very good. Further, in order to cut open the bottom of the bag on the hopper, it is necessary to open a large work space in a state where the bag is suspended in the air, so that there is a problem that the falling cement becomes dust and scatters around. . In addition, as the powder and granules contained in the bag, not only cement but also powdered clay and other soil improvement materials, etc., are targeted. It is distributed in a state of being housed in.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-described problem in handling powder such as cement, and has a mechanism for cutting a bag by heat at the upper part of a hopper so as to break the bag. It is an object of the present invention to solve the problem that powder is scattered and stained, and to provide an apparatus capable of maintaining a good working environment.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for cutting out and discharging the bottom of a bag for storing a granular material.
The invention according to claim 1 of the present invention provides a hopper for accommodating the granular material, a heating element disposed at a position where an upper portion of the hopper contacts a bottom portion of a bag body held in a suspended state, Means for performing control is provided. According to a second aspect of the present invention, the bag body is made of a thermoplastic resin material, and a heating wire is provided across the upper opening of the hopper as a heating element disposed on the upper portion of the hopper, and is provided via a switch means. Means for controlling the heating element by connecting the heating wire to a power supply. The invention according to claim 3 is characterized in that the granular material contained in the thermoplastic resin bag has a property that does not change thermally at a temperature at which the resin material is thermally cut.

[0006] With the above-mentioned structure, when discharging the granular material from the bag, it is not necessary to break the bag manually, so that the operation of discharging the granular material can be easily performed, and the opening mechanism can be opened. Can be simplified. Also,
In the present invention, since only the heating wire is arranged at the portion where the bag of the hopper is placed, the bag is opened with the bag positioned on the upper portion of the hopper, so that the powder particles discharged from the bag are removed. It is possible to prevent the body and the surrounding environment from being contaminated by the discharged particles without scattering the body to the surroundings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bag bottom opening device according to the present invention will be described with reference to the illustrated example. The example shown in FIGS.
A state is shown in which the bag body 1 containing cement or the like is positioned above the hopper 10 and the bottom portion 2 is opened. As shown in the figure, a bag 1 containing 1 ton of cement is suspended by a cargo handling device such as a crane or a hoist via a band-shaped suspending tool 3, positioned on a hopper 10 from a storage location, and opened. I do work. The heating wires 11 and 11a are arranged in a cross shape at a predetermined position on the upper portion of the hopper 10, for example, at a position where the bottom portion 2 of the bag body 1 enters in a comfortable state. Then, a system for supplying power to the heating wires via a switch 12 is connected, and the heating wires 11, 1
1a is heated to a temperature at which the resin material constituting the bag 1 melts, so that the bottom portion 2 can be opened.

The bag 1 is not used repeatedly, but is configured to be discarded after being used only once, and is made of vinyl chloride or another thermoplastic resin material. Then, the belt-shaped hanging member 3 is integrally provided, and the hanging member 3 is provided.
Is hooked to the hook of the crane so that it can be suspended. When taking out the cement or the like stored in the bag 1, a means has been conventionally used in which the bottom portion 2 is cut open using a knife or the like, and the content is dropped from the cut portion of the bottom portion 2 into a hopper. Have been. In the present embodiment, instead of the above-described conventional take-out means, in a state where the bag body 1 is positioned on the hopper 10, an opening operation can be performed without an operator directly touching the bag. It is what constitutes.

To take out the contents from the bag 1,
The bag 1 is placed on the hopper 10 using a cargo handling device such as a crane.
At the position where the bottom portion 2 is in contact with the heating wires 11 and 11a, and is stopped in a state of being suspended in the air. Then, the switch 12 is turned on, and the heating wires 11, 11 are turned on.
a, the bottom portion 2 is cut open in a cross shape by the heat of the heating wire, so that the contents such as cement contained in the bag body 1 fall by its own weight and fall into the hopper 10.
Housed within. At the time of unloading, the bag body 1 is held in a suspended state without the bottom portion 2 completely entering the hopper 10, so that the contents can be easily dropped by cutting open the bottom portion 2. . Therefore, the bag 1 containing the contents is suspended and the hopper 1
The operation of opening the bag 1 at 0 and discarding the empty bag 1 is performed by turning on / off the switch for the heating wire 11 and operating a cargo handling device such as a crane. There is no need to touch 1 by hand.

The device for supplying powder or the like from the bag 1 to the hopper 10 can be applied to, for example, a cement milk plant 5 shown in FIG. The cement milk plant 5 shown in FIG. 3 is installed as a plant for supplying cement milk to a drilling rig in ground improvement work or the like. Used to supply via pump 20. In the cement milk plant 5, a mixer 15 for preparing cement milk by mixing water and cement, and an agitator 17 for storing cement milk while conditioning it are provided. The two tanks 15, 17 are agitated. The blades 16 and 18 are provided, respectively, and a stirring action is performed by a driving unit (not shown).

The conveyer 13 and the water supply pipe 14 are connected to the mixer 15 to supply water and cement. To control the supply amount, for example, a member between the member supporting the mixer 15 and the tank is controlled. Then, a means for detecting the amount of water and cement supplied to the mixer 15 by disposing a weight detecting member such as a load cell can be used. In addition, the supply of water may be controlled by using any water amount adjusting means, and the supply of cement may be controlled by measuring the total weight of the mixer with respect to the amount of water supplied to the mixer. A conveyor 13 for supplying cement to the mixer 15 is disposed so as to be connected to the hopper 10. In order to replenish the hopper 10 with cement, an opening device for the bag 1 as shown in FIG. Deploy.

In the cement milk plant 5 configured as described above, the cement milk produced by the mixer 15 is stored in the agitator 17, and is sucked from the agitator 17 by the pump 20 through the pipe 19,
It is sent out via the supply pipe 21 to the drilling rig. Although the control panel 6 controls the driving of each mechanism of the plant, the control panel 6 may incorporate a switch for supplying power to the heating wire and a control unit therefor. Therefore, in the cement milk plant 5, the operation and control of the entire apparatus from the operation of supplying cement from the bag body 1 to the hopper 10 and the operation of supplying cement milk to the drilling rig are controlled by the control panel. 6, and the ground improvement work can be performed without the worker directly touching the powder or liquid.

In the present embodiment, the heating wire disposed on the hopper 10 can use any heat-generating member, and has a strength such that the heating wire is not cut while being pressed by the bag body 1. For example, it can be arranged along a beam-like object such as a grid arranged on a hopper. In addition, when it is pressed by the bag 1, a material having flexibility such as being curved along the bottom portion and along the curved surface of the bottom portion 2 can be used. The heating temperature of the heating wire may be set to the melting temperature of the resin material constituting the bag, and by heating the heating wire while the bottom portion 2 is pressed against the heating wire. , The bottom part 2 can be easily opened. Further, as described above, the heating wire disposed on the upper part of the hopper 10 is not limited to being arranged in a cross shape, and any cutting form may be used as long as the contents can be discharged from the bottom. Can be adopted.

In the above embodiment, the case where the powder contained in the bag 1 is cement is described, but zeolite or other clay is used as the powder used for the ground improvement work. In the case of the inorganic powder, even if the heating wire is heated at a temperature at which the bag made of the resin material can be opened, the bag is not affected by the heat. Further, in addition to the opening device used in the cement milk plant, the opening means by the heating wire shown in the present embodiment is not limited to the cement, but may be used for any other powder or granules stored in a resin bag. However, the present invention can be applied to those whose contents are not affected by the melting temperature of the resin material.

[0015]

Since the apparatus of the present invention is constructed as described above, it is not necessary to break the bag by hand when discharging the granular material from the bag body. Can be easily performed, and the configuration of the opening mechanism can be simplified. Further, in the present invention, since only the heating wire is arranged in the portion where the bag body of the hopper is placed, the bag is opened with the bag body positioned at the upper part of the hopper, so that the bag is discharged from the bag body. The granular material does not scatter to the surroundings, and the worker and the surrounding environment can be prevented from being contaminated by the discharged granular material.

[Brief description of the drawings]

FIG. 1 is a side view showing a relationship between a bag and a hopper.

FIG. 2 is a plan view of FIG.

FIG. 3 is an explanatory diagram showing a configuration of a cement milk plant.

[Explanation of symbols]

1 bag, 2 bottom part, 3 hanging equipment, 5
Cement milk plant, 6 control panel, 10
Hopper, 11 heating wire, 12 switch, 1
3 conveyor, 14 water supply pipe, 15 mixer, 17 agitator, 16.18 stirring blade, 1
9 pipes, 20 pumps, 21 supply pipes.

Claims (3)

[Claims] 1. A device for cutting and opening the bottom of a bag for storing powders and granules, comprising: a hopper for storing the powders and granules, and a bag held in a suspended state on an upper portion of the hopper. An opening device for a bag bottom, comprising: a heating element arranged at a position where the bottom portion contacts, and means for controlling the heating element. 2. A device for cutting and opening the bottom of a bag body containing a granular material, wherein the bag body is made of a thermoplastic resin material, and as a heating element arranged on an upper portion of the hopper, An opening for opening the bottom of the bag, wherein a heating wire is provided so as to cross the upper opening of the hopper, and a means for controlling the heating element by connecting the heating wire to a power supply via a switch means is provided. apparatus. 3. The powdery or granular material contained in the thermoplastic resin bag has a property that does not change thermally at a temperature at which the resin material is thermally cut. Opening device at the bottom of the bag.