JP2000025718A - Erroneous operation-preventing apparatus for foreign material detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for easily preventing an erroneous operation of a foreign material detector such as a metal detector. SOLUTION: Products, e.g. resin pellets, discharged from a hopper 4 are packed into a flexible container 6 through a weigher 5, a discharge gate 7 and a packing chute 2, The weigher 5 has a function of weighing a fixed amount of the products, The discharge gate 7 is opened and closed by means of a cylinder. At least one baffle 3, preferably two to five baffles, is disposed on an inner wall face of the packing chute 2. A metal detector 1 is provided at an inlet opening of the flexible container 6 and has a function of issuing an alarm when iron pieces are mixed in the products.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a malfunction of a foreign object detector.

[0002]

2. Description of the Related Art Heretofore, resin powder or pellets have been filled into flexible containers through a filling chute from a product hopper. However, the resin powder and the pellet sometimes contain foreign matter, for example, iron pieces coming out of the transport line. Therefore, a foreign substance detector, for example, a metal detector is usually installed at the entrance of the flexible container.

[0003]

However, the metal detector sometimes malfunctions, and each time, the operator fills the flexible container and spreads out the product until the operator finds a foreign substance. However, the cause of the malfunction of the metal detector is not clear, and the following various countermeasures have conventionally been taken. For example, anti-vibration measures can be implemented by attaching anti-vibration rubber under the metal detector,
In addition, measures were taken to eliminate static electricity on the inner wall of the metal detector. In addition, the route of signal cables was changed, and noise measures were taken for cables and electronic components. However, none of the measures were drastic.

An object of the present invention is to provide an apparatus for easily preventing a malfunction of a foreign substance detector such as a metal detector.

[0005]

Means for Solving the Problems The inventors of the present invention have made intensive studies on the above-mentioned problems, and as a result, by arranging at least one baffle plate on the inner wall surface of a filling chute provided above a foreign matter detector. To achieve the purpose of
The present invention has been completed.

That is, the present invention is an apparatus for preventing malfunction of a foreign substance detector, wherein at least one baffle plate is disposed on an inner wall surface of a filling chute provided above the foreign substance detector. Hereinafter, the present invention will be described in detail.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foreign substance detector is not particularly limited, and includes those usually used. Examples of the detector include a metal detector and the like.

The filling chute provided above the foreign substance detector is a transport line connecting between the hopper and the flexible container when bagging the flexible container or the like for shipping or storing the product from the product hopper. The present invention is characterized in that at least one, preferably 2 to 5 baffles are arranged on the inner wall surface of the filling chute.

The baffle plate is disposed on the inner wall of the filling chute so as to reduce the impact of the falling of the product on the inner wall of the filling chute and the metal detector, or to reduce the falling speed of the product. In addition, the baffle plate can achieve dispersion of a massive drop of the product. The shape of the baffle is not limited, and examples thereof include a triangular prism and a quadrangular prism. The material of the baffle is not particularly limited, and may be any material that can withstand the load when the product, for example, resin powder or pellets freely falls, such as stainless steel,
Aluminum, non-metals and the like can be mentioned.

The attachment of the baffle plate is not particularly limited, and examples thereof include welding, screwing, and bolting. Of these, welding is preferred. Further, the present invention can be manufactured by a simple modification of attaching a baffle plate to a filling chute that has been conventionally installed.

Next, the present invention will be described with reference to FIG. FIG. 1 shows a conceptual diagram of supplying a product from a hopper and filling a flexible container through a filling chute. The product discharged from the hopper 4, for example, resin pellets, is charged into the flexible container 6 via the weighing machine 5, the discharge gate 7 and the charging chute 2. The weighing machine 5 has a function of measuring a certain amount of the product. The discharge gate 7 is opened and closed via a cylinder.
Two baffle plates 3 are arranged on the inner wall surface of the filling chute 2. The metal detector 1 is installed at the entrance of the flexible container 6, and the metal detector has a function of notifying by an alarm when iron pieces are mixed in the product. When the alarm sounds, it is necessary to take out the foreign matter mixed in the flexible container 6. The product collides with the baffle plate 3 on the inner wall surface of the filling chute 2 and is charged into the flexible container 6 while changing the flow path. Further, the agglomerated product collides with the baffle plate 3 and is dispersed. By providing the baffle, malfunction of the metal detector did not occur.

[0012]

Hereinafter, the present invention will be described based on examples.
The present invention is not limited to the embodiments.

Example 1 A filling chute in which two stainless steel baffles were welded as shown in FIG. 1 was used. Polypropylene pellets were filled into a 1-t flexible container from a hopper via a filling chute. At the entrance of the flexible container, a metal detector (manufactured by Mytec, model DR2-P300, sensitivity setting Fe: 5 mm)
φ, SUS: 5 mmφ). The work of packing 180 tons of flexible containers a day was carried out for four consecutive months, but no malfunction occurred.

[0014]

As described above, according to the present invention, there is provided an apparatus for easily preventing a malfunction of a foreign object detector by disposing at least one baffle plate on the inner wall surface of a filling chute. it can. Further, the present invention can provide an apparatus for preventing malfunction of a foreign object detector by a simple modification of a filling chute. Further, the reliability of the foreign substance detector can be improved by the device of the present invention.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of supplying a product from a hopper and filling a flexible container through a filling chute.

[Explanation of symbols]

1 ... metal detector, 2 ... filling chute, 3 ...
・ Baffle plate, 4 ・ ・ ・ hopper, 5 ・ ・ ・ weighing machine, 6 ・ ・
-Flexible container, 7 ... discharge gate

Claims (2)

[Claims] 1. An apparatus for preventing malfunction of a foreign substance detector, wherein at least one baffle plate is disposed on an inner wall surface of a filling chute provided above the foreign substance detector. 2. The foreign matter detector is a metal detector.
A malfunction prevention device for the foreign matter detector according to the above.