JP2000051806A - Apparatus for cleaning flexible container bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cleaning effect to a flexible container bag and to shorten drying time after cleaning. SOLUTION: A flexible container bag 1 is hung up and warm air is blown into a top side opening part 2 from a warm air feeding pipe 11 to make the flexible container bag 1 to an expanded condition. A cleaning machine 7 is inserted from the top side opening part 2 of the flexible container bag 1 and warm water whose temp. is adjusted at 50-65 deg.C by means of a warm water feeding device 8 is sprayed toward the inner face of the flexible container bag 1 from a spherical nozzle 9. The warm water falls down on the inner face of the flexible container bag 1 under a condition where it is spread into a thin film and even when feeding of the warm water is stopped, the warm water adheres on the inner face of the flexible container bag 1 under the condition where it is spread into a thin film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag for mainly transporting various kinds of powders, a so-called flexible container bag cleaning apparatus.

[0002]

2. Description of the Related Art In order to mainly transport various kinds of granular materials such as pellets of feed and synthetic resin materials, they are manufactured from flexible materials such as polyvinyl chloride resin, polyethylene vinyl acetate copolymer resin and polyethylene resin. Bag
It is often referred to as a flexible container bag. This flexible bag has openings formed at both upper and lower ends, one opening is used as an input port, the other opening is used as a discharge port, and after filling the inside with these conveyed goods, these openings are bound. You.

[0003] There is a type of flexible container bag that is used repeatedly. In this type of flexible container bag, depending on the articles to be filled therein and the intended use, the inside of the flexible container bag must be filled before reuse (if necessary). (Even outside). For this purpose, various cleaning apparatuses for cleaning flexible container bags have been developed (Japanese Patent Laid-Open No. 7-68233).
No.).

In a conventional cleaning apparatus, a flexible container bag is cleaned with water at room temperature, and after draining, the bag is dried by far infrared rays or hot air.

[0005]

However, when the flexible container bag is washed with water at normal temperature, water remains on the surface of the flexible container bag as water droplets, and even after draining, the water remains as water droplets having a small surface area. If water droplets remain on the surface of the flexible container bag as described above, there is a problem that drying is difficult, efficiency is low even if the amount of heat is increased in a drying step using far infrared rays or hot air, and a long time is required for drying.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and a flexible container capable of cleaning and drying a flexible container bag in a short time and improving productivity. An object of the present invention is to provide a bag cleaning device.

[0007]

The present invention has the following features to attain the object mentioned above. The present invention is a cleaning means for cleaning the inner surface by introducing a cleaning liquid into a flexible container bag having a bag shape by opening the upper and lower ends,
A drying means for introducing air into the flexible container bag after the cleaning by the cleaning means and drying the flexible container bag, wherein the cleaning liquid introduced into the flexible container bag from the cleaning means is higher than room temperature. A flexible container bag cleaning device characterized by a temperature.

The high-temperature washing liquid not only has a strong washing power but also spreads down on the inner and outer surfaces of the flexible container bag while being spread in a thin film on the inner and outer surfaces. Therefore, unwashed residue hardly occurs, and the cleaning effect is enhanced.

Also, the cleaning liquid remaining on the inner surface of the flexible container bag after cleaning adheres to the inner surface in a state of being spread in a thin film form, so that the surface area of the remaining cleaning liquid is very large, and the cleaning liquid is easily evaporated. Therefore,
The drying time of the flexible container bag by the subsequent drying means can be shortened.

[0010] Examples of the cleaning liquid include hot water, and the temperature of the hot water can be 25 to 70 ° C, preferably 40 to 65 ° C. However, the cleaning liquid is not limited to warm water, and a chemical solution having a strong bactericidal effect can be used.

As the cleaning means, a cleaning means having a structure in which a cleaning liquid is sprayed and supplied to the inner surface of the flexible container bag can be exemplified. The drying means may have a structure in which hot air is supplied from one of upper and lower openings of the flexible container bag. The cleaning liquid easily accumulates in the lower portion of the flexible container bag, and when hot air is supplied from the upper opening, the hot air is first blown to the easily accumulating portion, whereby the drying of this portion can be accelerated.

[0012] The drying step of the flexible container bag by the drying means is performed by accommodating the flexible container bag in a drying chamber which is a substantially closed space, and includes a convection generating means for forcibly generating convection in the drying chamber. This is preferred for speeding up drying. The convection generating means is
The air in the drying chamber may be constituted by a blowing means for blowing air into the drying chamber, or the outside air may be constituted by a blowing means for blowing air into the drying chamber.

It is preferable to provide an exhaust means for forcibly exhausting the air in the drying chamber to the outside in order to accelerate drying.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a flexible container bag cleaning apparatus according to the present invention will be described below with reference to FIGS.
Will be described with reference to the drawings of FIG.

First, the flexible container bag will be described. As shown in FIG. 2, the flexible container bag 1 has a bag shape having openings 2 and 3 at both upper and lower ends. 1 is made of, for example, polyvinyl chloride resin, polyethylene vinyl acetate copolymer resin, or polyethylene resin.

FIG. 1 is a flow chart of a washing / drying operation for the flexible container bag 1.
2. Washing and drying are performed through a drying step 103, a cooling step 104, and an inspection / removal step 105, and all these steps are executed in the flexible container bag washing apparatus. Hereinafter, description will be made in the order of steps.

<Mounting Step> First, the mounting step 101 will be described with reference to FIG. 2. In the mounting step 101, the funnel-shaped chute 4 is inserted into the upper opening 2 of the flexible container bag 1, and The chuck 5 is mounted from the outside of the section 2, and the open state of the opening 2 is maintained. Further, in the mounting step 101, the flexible container bag 1 is mounted in a suspended state by a transport device (not shown) by the lifting arm 6 connected to the chuck 5. The transfer device automatically transfers the flexible container bag 1 to a work position in a subsequent process.

<Cleaning Step> The flexible container bag 1 attached to the transfer device is transferred to a cleaning chamber (not shown), and proceeds to a cleaning step 102. FIG. 2 is a diagram of a cleaning process, in which a cleaning machine 7 is inserted into the flexible container bag 1 via a chute 4. Hot water (for example, 40 to 65 ° C.) is supplied to the washing machine 7 from the hot water supply device 8, and the hot water is blown out from the spherical nozzle 9 of the washing machine 7 in all directions and collides with the inner surface of the flexible container bag 1. Then, it spreads like a thin film on the inner surface and flows downward along the inner surface. The washing machine 7 is installed so as to be able to move up and down inside the flexible container bag 1, and by blowing warm water from the spherical nozzle 9 while moving the washing machine 7 up and down, hot water is sprayed on the entire inner surface of the flexible container bag 1. Can be In this embodiment, a washing machine 7, a hot water supply device 8, a spherical nozzle 9
Constitutes a cleaning means.

While supplying hot water into the flexible container bag 1, the flexible container bag 1
In order to maintain the swelling state, hot air (for example, 30 to 60 ° C.) is blown out from the hot air supply device 10 into the chute 4 through the hot air supply pipe 11.

A washing machine 12 is also provided around the outside of the flexible container bag 1, and the hot water supplied from the hot water supply device 8 is sprayed on the outer surface of the flexible container bag 1 through each nozzle 13 of the washing machine 12. Then, the outer surface of the flexible container bag 1 is cleaned.

As described above, when the flexible container bag 1 is washed with hot water, since the hot water has a high washing effect, it is possible to wash off terrible dirt or oily dirt that has not been removed by washing with normal-temperature water.

Further, the hot water spreads over the entire inner and outer surfaces of the flexible container bag 1 in a thin film form and flows down, so that there is no residual washing, which also contributes to the enhancement of the cleaning effect. Then, even after the supply of the hot water from the washing machine 7 is stopped, when the flexible container bag 1 is drained, the hot water spreads down the inner and outer surfaces of the flexible container bag 1 in a thin film form and descends. It will remain in the form of a thin film. Therefore, the hot water does not remain on the inner and outer surfaces of the flexible container bag 1 in a state of water droplets. This characteristic of the hot water has a great effect also when the flexible container bag 1 is subsequently dried.

<Drying Step> In this state, the flexible container bag 1 is quickly transferred to the drying chamber by the transfer device before the attached hot water for washing is cooled, and the process proceeds to the drying step 103. FIG. 3 is a diagram of the drying step. The drying chamber 20 is a substantially closed space, and the flexible container bag 1 stops in the drying chamber 20,
It is held in a suspended state.

Inside the drying chamber 20, a blower (convection generating means) 21 for forcibly generating air convection in the drying chamber 20 is provided. In the drying room 20,
An exhaust pipe 22 for forcibly discharging air in the drying chamber 20 from the drying chamber 20 is connected, and a blower (exhaust means) 23 is connected to the exhaust pipe 22. Further, the drying chamber 20 is provided with a hot air supply device (drying means) 24 for blowing hot air into the flexible container bag 1. The hot-air supply device 24 has a predetermined temperature (for example, 40
A hot air generator 25 for generating hot air of about 65 ° C.), an air cleaner 26 for removing dust and the like present in the hot air sent from the hot air generator 25, and a hot air supply pipe 27. Have been. In the drying chamber 20, an infrared thermometer 28 for detecting the temperature of the flexible container bag 1 is installed at a predetermined position.

When the flexible container bag 1 is set in the drying chamber 20 as described above, the hot air supply pipe 2 extends from the lower opening 3 of the flexible container bag 1.
7 is inserted, and the clean hot air of the predetermined temperature is blown into the flexible container bag 1 from the hot air generator 25. This hot air flows into the flexible container bag 1
It rises inside and is discharged to the drying chamber 20 through the upper opening 2 and the chute 4.

Further, the blower 21 and the blower 23 operate simultaneously with the operation of the hot air generator 25. The operation of the blower 21 causes convection in the drying chamber 20, and the warm air discharged from the opening 2 of the flexible container bag 1 also flows outside the flexible container bag 1. Then, by the operation of the blower 23, the warm air convection in the drying chamber 20 is exhausted out of the drying chamber 20.

As described in the washing step, the hot water remaining on the inner and outer surfaces of the flexible container bag 1 after draining the hot water for washing adheres to the inner and outer surfaces in a state of being spread in a thin film form, and water droplets are formed. Does not. In this cleaning device, the flexible container bag 1
The hot water for washing attached to the flexible container bag 1 is shifted to the drying step before the hot water for washing is not cooled. Therefore, even when the drying step starts, the hot water adhering to the inner and outer surfaces of the flexible container bag 1 is kept in a thin film state. I have. Since thin-film hot water has a very large surface area as described above, it can be very efficiently evaporated by hot air.

The hot water adhering to the inner surface of the flexible container bag 1 travels downward and tends to accumulate in the lower portion. However, since warm air is blown from the lower side of the flexible container bag 1, the humidity is still low. The low-temperature hot air will be used first for drying the portion where hot water is likely to accumulate, and hasten the drying of this portion.

Since the convection of the warm air is generated in the drying chamber 20, the outer surface of the flexible container bag 1 can be efficiently dried. In addition, since the hot air in the drying chamber 20 whose humidity has increased due to the evaporation of the hot water is forcibly exhausted by the blower 23, the drying of the flexible container bag 1 is also accelerated.

Therefore, in this cleaning apparatus, the flexible container bag 1 can be dried in a short time. Moreover, since the warm air is supplied to the flexible container bag 1 after being purified by the air cleaner 26, the inner surface of the flexible container bag 1 is not stained by the warm air.

In this cleaning device, the degree of drying of the flexible container bag 1 is estimated from the temperature of the flexible container bag 1 detected by the infrared thermometer 28, and the temperature detected by the infrared thermometer 28 reaches a predetermined temperature. At this time, it is considered that the flexible container bag 1 has been dried to a predetermined drying condition, and the drying step ends.

The management by detecting the temperature of the flexible container bag 1 enables the degree of drying of the flexible container bag 1 to be maintained at a constant level.
The hot water temperature during the washing step, the hot air temperature during the drying step, the amount of hot air blown, the amount of air blown by the blower 21, the amount of exhaust air from the blower 23, and the like can be set to optimal values.

The hot air may be supplied into the drying chamber 20 from another hot air generator (convection generating means) 30 via a hot air supply pipe 31. By doing so, the drying of the outer surface of the flexible container bag 1 can be further accelerated. Further, in this embodiment, hot air is supplied from the lower opening 3 of the flexible container bag 1, but hot air may be supplied from the upper opening 2.

<Cooling Step> Then, the flexible container bag 1 is transferred to a cooling chamber (not shown) by the transfer device, and the process proceeds to the cooling step 104.

In the cooling step 104, dehumidified cooling air at room temperature is blown into the flexible container bag 1 from above the chute 4 and discharged from the lower opening 3 into the cooling chamber. Thereby, the inner and outer surfaces of the flexible container bag 1 heated by the warm air in the drying step are cooled by the dehumidified cool air. As a result, it is possible to prevent dew condensation on the inner and outer surfaces of the flexible container bag 1.

<Inspection / Removal Step> The flexible container bag 1 cooled in the cooling chamber is transported to the inspection chamber by the transport device, where a predetermined inspection is performed.
Removed from the transport device.

[Comparison with the conventional method] When the flexible container bag 1 is washed with water as in the prior art, it takes 60 to 12 to dry the flexible container bag 1.
In contrast to the time required for 0 minutes, according to the method of the above-described embodiment, the drying time was 25 to 35 minutes. Also, the yield of the flexible container bag 1 is 90% in the conventional method.
On the other hand, according to the method of the above embodiment, 9
It improved to 5-98%, and the effect of improving productivity was observed.

[0038]

As described above, according to the apparatus for cleaning a flexible container bag according to the present invention, the upper and lower ends are opened to introduce a cleaning liquid into the inside of the flexible container bag having a bag shape to clean the inner surface. Washing means, and drying means for introducing air into the flexible container bag after drying by the washing means and drying the flexible container bag, wherein the washing liquid introduced from the washing means into the flexible container bag has a temperature higher than room temperature. As a result, the flexible container bag can be more effectively cleaned, and the drying time of the flexible container bag after the cleaning can be shortened, resulting in an excellent effect that the productivity is improved. You.

When the drying means for supplying hot air from the lower opening of the flexible container bag is used, the lower portion of the flexible container bag, which has been difficult to dry conventionally, can be quickly dried.

The drying step of the flexible container bag by the drying means is performed by accommodating the flexible container bag in a drying chamber which is a substantially closed space, and convection generating means for forcibly generating convection in the drying chamber is provided. In this case, the drying time of the flexible container bag can be further reduced.

When the exhaust means for forcibly exhausting the air in the drying chamber to the outside is provided, the drying time of the flexible container bag can be further reduced.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a washing process of a flexible container bag.

FIG. 2 is a diagram illustrating a cleaning step in an embodiment of the flexible container bag cleaning apparatus according to the present invention.

FIG. 3 is a diagram illustrating a drying step in the embodiment of the flexible container bag cleaning apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible container bag 2 Opening part (upper side) 3 Opening part (lower side) 7 Washer (washing means) 8 Hot water supply device (washing means) 9 Spherical nozzle (washing means) 20 Drying chamber 21 Blower (convection generating means) 23 Blower (exhaust means) 24 Hot air supply device (drying means) 25 Hot air generator 26 Air cleaner 27 Hot air supply pipe 30 Hot air supply device (convection generation means)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kanya Kubota 3 Chigusa Coast, Ichihara-shi, Chiba Cosmos Industry Co., Ltd. (72) Inventor Shizuo Oki 3 Chigusa Coast, Ichihara-shi, Chiba Mitsui Petrochemical Engineering Co., Ltd. Inside the company (72) Inventor Masaaki Nakae 3 Chigusa Coast, Ichihara-shi, Chiba Mitsui Petrochemical Engineering Co., Ltd. (72) Inventor Koji Kitajima 54 Aoyanagi Coastal Land Readjustment Association, No. 4, F-term (reference) 3B116 AA30 AB42 BB23 BB34 BB62 BB82 CC03 CD42 CD43 3L113 AA01 AB02 AC01 AC21 AC25 AC35 AC45 AC46 AC48 AC52 AC53 AC54 AC63 AC64 AC76 AC90 BA12 CA04 CA08 DA04 DA10 DA23

Claims (5)

[Claims] 1. A cleaning means for introducing a cleaning liquid into a flexible container bag having a bag shape with upper and lower ends opened to clean the inner surface, and introducing air into the flexible container bag after the cleaning by the cleaning means. A flexible container bag cleaning device, comprising: a drying unit configured to dry the flexible container bag. The cleaning liquid introduced into the flexible container bag from the cleaning unit is at a temperature higher than room temperature. 2. The flexible container bag cleaning apparatus according to claim 1, wherein the cleaning liquid is hot water at 25 to 70 ° C. 3. The flexible container bag cleaning apparatus according to claim 1, wherein the drying unit supplies hot air from an opening of the flexible container bag. 4. The step of drying the flexible container bag by the drying means is performed by accommodating the flexible container bag in a drying chamber, which is a substantially closed space, and forcibly generating convection in the drying chamber. The flexible container bag cleaning device according to claim 1 or 3, further comprising means. 5. The flexible container bag cleaning apparatus according to claim 4, further comprising an exhaust unit for forcibly exhausting the air in the drying chamber to the outside.