JP2018162991A - Leakage detection unit of cup-shaped container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a new method different from the conventional method and develop a unit (device) that realizes the new method for the leakage detection of a cup-shaped container and the like.SOLUTION: A leakage detection unit detects a leakage of a cup-shaped container to be inspected by allowing inflow of gas from an upper part so as to detect a pressure fluctuation in a sealed space of the inside of a cup and a bottom rim part in a state where an opening is sealed and the bottom rim part is sealed with a placing part of the cup-shaped container with respect to the cup-shaped container having the opening at the upper part and the bottom rim part at a lower part. The leakage detection unit may include a conveyor unit for supplying the cup-shaped container to the leakage detection unit and a conveyor unit for discharging the cup-shaped container after the inspection.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a leak detection unit for cup-shaped containers such as paper or earthenware.

Cup-shaped containers such as paper cups are widely used in various fields including food. Here, the occurrence of leakage when water or the like is poured into the paper cup is a big problem. For this reason, it is extremely important to check beforehand that there is no leakage in the cup-shaped container.
For example, the following prior art relates to a detection device for detecting leakage of a paper cup-shaped container before use, and is a type in which a cup-shaped container body is confined in a space sealed outside. However, it is assumed that the device will be complicated, and other leak detection methods can be considered.

Utility model registration No. 3072863

  Then, the present inventors examined another method for the leak detection method for a cup-shaped container or the like, and an object was to develop a new unit (device) that can realize the method.

As a result of diligent research by the present inventors, as a method of detecting leakage of a cup-shaped container, the cup-shaped container having an opening at the top and a thread bottom at the bottom is sealed and the cup-shaped In a state where the yarn bottom of the container is sealed from the mounting portion, gas flows in from the top, and by detecting pressure fluctuations in the closed space inside the cup and the yarn bottom, leakage of the cup-shaped container to be inspected is detected. The present invention was completed by finding that the detection method can easily detect leakage.
That is, the first invention of the present application is
“A leak detection unit for a cup-shaped container for detecting a leak at the side or bottom of a cup-shaped container having an opening at the top and a thread tail at the bottom,
An upper lid for sealing the upper opening of the cup-shaped container;
A gas supply means mounted in communication with the upper lid, and for introducing gas into the cup;
Pressure detecting means for detecting a pressure drop inside the cup of the cup-shaped container;
The cup-shaped container is placed, and a placing part that seals the thread bottom part at the bottom of the cup; and
A cup-shaped container leak detection unit, comprising: a pressure detection means that is mounted in communication with the placement portion and detects a pressure increase in the sealed yarn bottom space. “It is.

Next, the present applicant is provided with the above-described cup-shaped container leakage detection unit, a cup-shaped container including a conveyor unit for supplying the cup-shaped container to the detection unit, and a conveyor unit for discharging the cup-shaped container after the inspection. A container leak detection device is also contemplated.
That is, the second invention of the present application is
“A cup-shaped container comprising a leak detection unit for the cup-shaped container, a conveyor unit for supplying the cup-shaped container to the leak detection unit, and a conveyor unit for discharging the cup-shaped container after the leak detection test is completed. Leak detection device. "

In addition, the applicant of the present invention also contemplates a leak detection method realized in the cup-shaped container leak detection unit according to claim 1.
“A leak detection method for a cup-shaped container for detecting a leak at the side or bottom of a cup-shaped container having an opening at the top and a thread tail at the bottom,
1) The cup-shaped container is self-supported on a predetermined mounting part, and the opening of the cup-shaped container is pressed and sealed from above, whereby the cup-shaped container inner space and the thread of the mounting part and the cup-shaped container are described above. Sealing the space formed by the butt,
2) a step of flowing gas into the sealed cup-shaped container interior space;
3) detecting a pressure drop in the cup-shaped container internal space after gas inflow and a pressure increase in the space formed by the yarn bottom portion;
A method for detecting leakage of a cup-shaped container. “It is.

  By utilizing the cup-shaped container leak detection device of the present invention, it is possible to easily detect the leakage of the cup-shaped container to be inspected.

It is a front view of the 1st embodiment of the cup-shaped container leak detection unit of the present invention. It is sectional drawing of the cup-shaped container made into the test object by this invention. It is the front schematic diagram which showed the process of the detection of the leak of the 1st embodiment of the cup-shaped container leak detection apparatus of this invention. It is the plane schematic diagram which showed the 1st embodiment aspect of the cup-shaped container leak detection apparatus of this invention.

DESCRIPTION OF SYMBOLS 1 Support bar 3 Horizontal bar 5 Upper cover part 7 Upper cover packing 9 Rod 11 Air cylinder 13 Gas supply part 14 Pressure reduction detection pipe 15 Pressure reduction detection part 21 inside cup-shaped container 21 Support base 23 Mounting part 24 Mounting Rod 25 Mounting part packing 27 Support spring 31 Pressure increase detection tube (pressure tube)
33 Yarn bottom pressure increase detection unit 35 Position adjustment member 41 Conveyor unit for container supply 43 Conveyor unit for container discharge 45 Pusher device for cup transfer 47 Conveyor shutter 80 Leak detection unit for cup-shaped container C Cup-shaped container CL Cup-shaped Container lip CB Cup-shaped container thread bottom

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments.
In the present invention, the cup-shaped container to be subjected to the inspection for leakage is a cup-shaped container having an open top. In particular, the cup-shaped container C is assumed to be of a type in which a thread tail CB is provided on the bottom as shown in FIG.

As for the material of the cup-shaped container, mainly paper, plastic, metal, ceramics, etc. are possible. Of course, polyethylene, polypropylene, or polyethylene terephthalate may be laminated on the surface of the paper cup by dry lamination or extrusion lamination.
Next, FIG. 1 shows the first embodiment of the leak detection unit 80 of the first cup-shaped container of the present invention. FIG. 1 is a front view of a leak detection unit for a cup-shaped container according to a first embodiment of the present invention.

─Cup container leak detection unit─
As shown in FIG. 1, the cup-shaped container leakage detection unit according to the first embodiment of the present invention is an upright state in which the upper part of the opening is positioned upward with respect to the cup-shaped container. And a gas supply unit 13 that communicates with the upper lid 3, and a detection unit 15 that can detect the pressure in the cup container.

Furthermore, a sealed space is formed between the cup yarn bottom portion CB and the placement portion 23, and the detection portion 33 is connected to the placement portion 23 so that the pressure in the space can be detected. I have. Then, after supplying the gas by the air flow supply means, by detecting the change in the pressure in the space in the cup-shaped container and the space between the yarn bottom portion CF and the placing portion 23, the leakage occurs in the target cup-shaped container. It is possible to judge whether there is.

The configuration of the cup-shaped container leakage detection unit shown in FIG. 1 will be specifically described below.
Two rods are inserted into the horizontal bar 3 having a flat surface portion extending from the support rod 1 through a hole provided so as to penetrate through two insertion nuts provided in the flat surface portion. An air cylinder 11 is provided so that 9 can move in the vertical direction (the piston portion is not shown).

The upper lid 3 is connected to the lower end of the rod 9 so that the lid 9 can be moved in the vertical direction simultaneously with the vertical movement of the rod 9. A packing portion 7 is provided on the lower surface portion of the upper lid, and a state where the inside of the cup-shaped container is hermetically sealed can be formed when closely contacting the lip portion CL of the cup-shaped container as shown in FIG. It is like that.
An airflow pipe 12 communicates with the upper lid part 5 so that gas can be supplied to the lower part of the upper lid part 5, and gas can be supplied to the airflow pipe 12 so that the gas has a predetermined pressure. A gas supply device 13 having a compressor section and an open / close switching valve is separately provided.
Furthermore, the upper lid 5 is provided with a detection tube 14 connected to an external pressure detection unit so that the pressure inside the cup-shaped container can be detected when a sealed state with the cup-shaped container C is formed. A lid 5 is provided in communication.

  Next, on the side of the mounting portion 23, four vertical mounting rods 24 extending downward from the mounting portion 23 are provided, and the corresponding plurality of holes provided in the support base 21 are provided. Configured to insert. Further, the support spring 27 provided on the vertical mounting rod 24 is provided so as to contract when the cup-shaped container C is pressed downward and to urge upward.

Further, the mounting portion 23 is provided with a packing portion 25 so that the yarn bottom portion CB of the cup-shaped container C can be in close contact, and is sealed between the yarn bottom portion CB of the cup-shaped container and the mounting portion 23. It is comprised so that the defined space can be formed.
Further, when the above-described sealed state is formed, a detection tube 31 is provided in communication with the mounting portion 23 so as to be connected to an external pressure detection portion so that the internal pressure can be detected.
Next, an actual leak detection procedure will be described with reference to FIG.
As shown in FIG. 3 (1), first, the cup-shaped container is placed at a predetermined position of the placement portion 23. As the mounting method, various methods such as a method of transferring by a conveyor or the like can be adopted. Of course, it may be performed manually.
In addition, as shown in FIG. 1, it is effective to set it to a predetermined position in contact with a position adjusting member 35 provided on the mounting portion 23. Moreover, in the said mounting state, the thread | yle bottom part CB of the cup-shaped container C is located in the packing part provided in the mounting part.

Next, the upper lid 5 is lowered from the upper part. The upper lid 5 is in contact with the opening (lip portion) CL of the cup-shaped container C, but the cup-shaped container C is pressed so that the packing portion 7 of the upper lid 5 is in close contact with the opening CL, ie, A state where the inside of the cup-shaped container is sealed is formed by pressing and sealing the opening.
Further, since the upper lid portion 5 presses the cup-shaped container C from above, a space in which the thread bottom portion CB of the cup-shaped container C is simultaneously sealed with the packing portion 25 of the placement portion 23 is formed.
In this state, as shown in FIG. 3B, the gas is supplied into the upper lid 5 through the airflow pipe 12 until the inside reaches a predetermined pressure. The pressure of the gas to be supplied can be appropriately adjusted and set according to the material of the target cup-shaped container.

Here, if the predetermined pressure may not be reached, it is presumed that a relatively large leaking portion where gas flows out from the side surface or bottom surface of the cup-shaped container C is generated, and the defective cup is removed. It can be excluded.
Further, when a predetermined pressure is reached from the supply of airflow, the supply of gas is stopped, or the valve of the airflow supply pipe 12 is switched together with this to make the inside of the cup-shaped container sealed.
Subsequently, in this state, as shown in FIG. 3 (3), a change in pressure inside the cup container C is examined by the pressure detection unit 15 communicated with the upper lid 5. Here, when a pressure drop occurs in the pressure detection, it is presumed that gas leaks from the body or bottom of the cup-shaped container C, so that the defective cup can be excluded. .

At the same time, the pressure change is also examined in the sealed space of the thread bottom portion CB of the cup-shaped container C and the placement portion 23 described above. When an increase in pressure in the sealed yarn bottom space is detected by the pressure detection unit 33 communicated with the placement unit 23 via the detection tube 31, gas leaks at the bottom of the cup-shaped container. Therefore, the defective cup can be excluded.
In addition, the timing of the detection of the pressure inside the cup-shaped container C after the gas supply and the detection of the pressure in the yarn bottom portion CB space of the cup-shaped container C may be made either before or after the gas supply. Of course, it may be.
As described above, since the leakage of the side surface portion or the bottom surface portion of the cup-shaped container C can be detected by using the present invention, it is possible to exclude defective cups.

─Cup container leak detection device─
Next, FIG. 4 shows a schematic plan view of one embodiment of the entire inspection apparatus including the cup-shaped container leakage detection unit 80 of the present invention.
The cup-shaped container leak detection unit 80 of the present invention is a detection unit capable of detecting a leak of a cup-shaped container. By combining the detection unit 80 and the conveyor unit, as shown in FIG. 4, a cup-shaped container leak detection device including the leak detection unit can be obtained.

In this embodiment, a plurality (10 units) of the cup-shaped container leakage detection units 80 are continuously arranged along the traveling direction of the conveyor 41.
A plurality of (10 lanes) conveyor units 43 are installed in parallel so as to branch from the position of each detection unit 80 of the conveyor 41. After completion of the leak detection test in the detection unit 80, each cup-shaped container C that is normal can be discharged and transported to the branched conveyor 43 side. The unit 80 is provided with a cup transfer pusher device 45. Specifically, in the embodiment shown in FIG. 4, the cup-shaped containers C are continuously supplied by the conveyor unit 41, and the cup-shaped containers C are sequentially conveyed on the conveyor in the direction of the arrow. Then, the conveyor shutter 47 is lowered, and the cup-shaped containers C are sequentially disposed on the mounting portions 23 of the cup-shaped containers C that are inspection units while stopping the conveyance of the cup-shaped containers C.

The conveyor unit 41 stops with the cups C placed on all the placement parts 23, the upper lid part 5 descends from the upper part of the cup-like containers C arranged on each placement part, and the cup-like containers The opening is pressed and sealed, and leak detection is performed.
For detection of leakage, each detection unit 80 is individually inspected. After the inspection is completed, for a normal cup without leakage, the pusher device 45 is operated to press the cup and is transferred to the discharge conveyor unit 43. Be transported.
On the other hand, for the defective cup in which leakage is detected, the pusher device 45 does not operate and remains in the placing portion, the conveyor shutter 47 is released, and the conveyor unit 41 starts re-conveying. The unit 41 is transported in the traveling direction as it is and discarded.

In addition, about supply and mounting of the cup container C to the mounting portion 23 of the detection unit 80, an auxiliary device such as a position adjusting mechanism may be provided as appropriate.
In FIG. 4, for convenience, the gas supply unit 13, the upper side and lower side pressure detection units (15, 33), the air flow supply tube 12, various power units, and the like are omitted.
Furthermore, in FIG. 4, although the example of the press by the pusher apparatus 45 is shown about transfer from the detection unit 80 to the discharge conveyor 43, it is not limited to this, A pulse air machine etc. are also possible. In addition, as a method for supplying the cup-shaped container C, various modes are possible. Of course, these can be changed as appropriate.

Claims (3)

A leak detection unit for a cup-shaped container for detecting a leak at the side or bottom of a cup-shaped container having an opening at the top and a thread tail at the bottom,
An upper lid for sealing the upper opening of the cup-shaped container;
A gas supply means mounted in communication with the upper lid, and for introducing gas into the cup;
Pressure detecting means for detecting a pressure drop inside the cup of the cup-shaped container;
The cup-shaped container is placed, and a placing part that seals the thread bottom part at the bottom of the cup; and
A cup-shaped container leak detection unit, comprising: a pressure detection means that is mounted in communication with the placement portion and detects a pressure increase in the sealed yarn bottom space.
A cup-shaped container having a leak detection unit for the cup-shaped container, a conveyor unit for supplying the cup-shaped container to the leak detection unit, and a conveyor unit for discharging the cup-shaped container after completion of the leak detection test. Leak detection device.
A leak detection method for a cup-shaped container for detecting a leak at a side or bottom of a cup-shaped container having an opening at the top and a thread tail at the bottom,
1) The cup-shaped container is self-supported on a predetermined mounting part, and the opening of the cup-shaped container is pressed and sealed from above, whereby the cup-shaped container inner space and the thread of the mounting part and the cup-shaped container are described above. Sealing the space formed by the butt,
2) a step of flowing gas into the sealed cup-shaped container interior space;
3) detecting a pressure drop in the cup-shaped container internal space after gas inflow and a pressure increase in the space formed by the yarn bottom portion;
A method for detecting leakage of a cup-shaped container.

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