JPH05180720A - Device for measuring internal pressure of can - Google Patents

Abstract

PURPOSE:To measure the internal pressure of a sample can continuously for saving labor for sampling the can, obtain continuous data and enhance utilization value of measurement result, and at the same time obtain a device for measuring the internal pressure of the can which can accurately measure the internal pressure in the sample can. CONSTITUTION:The title device is provided with a pressure measuring device 6 which is fixed in one piece with a sample can which is subject to the same treatment process as that of a can which is a product or is flown to the same treatment process as that of the sample can while it is constituted separately from the sample can and pressure introduction parts 5, 8, and 9 which allows a pressure-sensitive part of the pressure measuring device 6 to communicate with the inside of the sample can with a small volume.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can for continuously detecting the internal pressure in the can during the process of heat-treating, for example, sterilization of a can filled with a beverage or the like and sealed. The present invention relates to an internal pressure measuring device.

[0002]

2. Description of the Related Art Conventionally, a can filled with a beverage and sealed is passed through a heating furnace for heat sterilization. At this time, in order to determine whether the heat sterilization step is appropriately performed, the sample can that is charged with a small temperature measuring device in the drink in the can is flown into the heating line, and the temperature of the drink in the sample can is measured. Is continuously measured and recorded.

Further, in order to determine the suitability of the gas filling process when the can is sealed, it is practiced to sample the can during heat sterilization and measure its internal pressure with a can internal pressure measuring device.

[0004]

However, in the conventional can internal pressure measuring device, the can during heat sterilization must be sampled and measured in the middle of the process, and the sampling work is complicated and troublesome. Since the internal pressure in the can could not be measured continuously, data such as the maximum value of the internal pressure could not be obtained, and the utility value of the measurement results was low. Further, when a device such as a Bourdon tube pressure gauge is used as the measuring device, the volume of the measuring portion is the volume of the space formed in the upper part of the sample can (head space) (usually,
However, there is a problem that the measured value is detected lower than the actual internal pressure.

The present invention has been made in view of the above circumstances, and the internal pressure in the sample can can be continuously measured. Therefore, the labor of sampling the can can be omitted and continuous data can be obtained. An object of the present invention is to provide a can internal pressure measuring device capable of increasing the utility value of the measurement result and accurately measuring the internal pressure of the sample can.

[0006]

A can internal pressure measuring device according to claim 1 of the present application is a pressure measuring device integrally fixed to a sample can which is subjected to the same treatment step as a product can, and the pressure measuring device. The pressure sensing part and the pressure introducing part for communicating the inside of the sample can with a minute volume are provided.

The internal pressure measuring device for a can according to claim 2 of the present application is
In the can internal pressure measuring device according to claim 1, the pressure measuring device is fixed to the outer surface of the sample can.

The can internal pressure measuring device according to claim 3 of the present application is
In the can internal pressure measuring device according to claim 1, the pressure measuring device is fitted and fixed to the lid of the sample can.

According to claim 4 of the present application, the can internal pressure measuring device is
2. The can internal pressure measuring device according to claim 1, wherein the pressure introducing portion has a blind plug made of an elastic body fitted in a through hole penetrating the bottom of the lid or the body of the sample can while maintaining airtightness, and A thin hollow needle is inserted into the blind plug by penetrating the blind plug, and the needle is connected to the pressure sensing portion of the pressure measuring device in a minute volume. ..

According to claim 5 of the present application, the can internal pressure measuring device is:
A pressure measuring device configured separately from a sample can that is flown in the same processing step as a product can, and a pressure measuring device that is flowed in the same processing step simultaneously with the sample can, a pressure sensing unit of the pressure measuring device, and the sample can. A pressure introducing portion communicating with the inside in a minute volume is provided.

According to claim 6 of the present application, the internal pressure measuring device for a can comprises:
The can internal pressure measuring device according to any one of claims 1, 4 and 5, wherein the pressure measuring unit converts a pressure sensing unit that senses pressure and a pressure value sensed by the pressure sensing unit into an electric quantity. And a power supply unit for supplying electric power to the storage unit and the storage unit, which sequentially stores the electric quantity converted by the conversion unit.

[0012]

According to the can internal pressure measuring device of the present invention, the pressure measuring device is integrally fixed to the sample can, and the pressure sensing portion of the pressure measuring device and the inside of the sample can have a very small volume. Since it is communicated through the pressure introducing part of the sample can, the internal pressure of the sample can can be continuously measured by flowing this sample can in the same treatment step as the product can. It is possible to continuously measure the internal pressure while transporting and to use the result. Moreover, since the pressure introducing portion is constituted by a minute volume, the internal pressure can be measured accurately and accurately.

According to the can internal pressure measuring device of the second aspect of the present invention, since the pressure measuring device is fixed to the outer surface of the sample can, the internal space of the sample can has the same volume as that of a normal product can. It becomes possible to measure the internal pressure under the same conditions as the product can.

According to the can internal pressure measuring device of the present invention, since the pressure measuring device is fitted and fixed to the lid of the sample can, means for fixing the pressure measuring device to the sample can is separately provided. Since it is not necessary to provide it, no protrusion is formed on the outer surface of the sample can, and when the product can and the sample can are put together, they do not interfere with each other.

According to the can internal pressure measuring device of the fourth aspect of the present application, since the blind plug made of the elastic body is fitted in the through hole penetrating the lid of the sample can while maintaining the airtightness, It becomes possible to make a sample can by sealingly attaching the lid like the can of the product of 1., and a thin hollow needle is inserted into the blind stopper through the blind stopper. Since it is connected to the pressure sensing part of the pressure measuring instrument with a small volume, it is possible to insert the needle into the blind plug with a simple operation, and the pressure inside the sample can and the pressure measuring instrument can be inserted through this needle. It is possible to easily connect with the sensing unit. Moreover, since the pressure introducing portion and the needle are connected in a minute volume, the internal pressure can be measured accurately and accurately.

According to the internal pressure measuring device of the fifth aspect of the present application, the sample can is connected to the pressure measuring device formed separately from the sample can, and the pressure sensing part of the pressure measuring device and the sample can. Since the inside of is communicated with the pressure introducing portion of a minute volume, by flowing this sample can and the pressure measuring device in the same processing step as the can as the product,
It is possible to continuously measure the pressure inside the sample can, and for example, it is possible to continuously measure the internal pressure while transporting the sample can and use the result.
Moreover, since the pressure introducing portion has a minute volume, the internal pressure can be measured accurately and accurately.

According to the can internal pressure measuring device of the sixth aspect of the present application, the pressure measuring device comprises a pressure sensing part for sensing the pressure and a conversion part for converting the pressure value sensed by the pressure sensing part into an electric quantity. And a storage unit that sequentially stores the electric quantity converted by the conversion unit and a power supply unit that supplies electric power to the conversion unit and the storage unit, so that the sample can is processed in the same process as the product can. By flowing, the change in the pressure inside the sample can can be stored while continuously converting it into an electric quantity. Therefore, it is possible to know the change in the internal pressure during the processing step by reading the quantity of electricity stored in the storage unit after the transportation of the sample can is completed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The can internal pressure measuring device 1 of this embodiment is constructed as follows.

That is, as shown in FIGS. 1 and 3, a through hole 4 is formed through the lid 3 attached to the upper end of the can body 2 of the sample can, and the through hole 4 is made of an elastic circle. A columnar blind plug 5 is inserted while maintaining airtightness. In addition, 12 in FIG. 3 is a tab for opening a can.

As shown in FIG. 1, the pressure measuring device 6 is provided on the outer surface of the can body 2 with a pressure sensing portion (not shown) inside.
Are fixed by a rubber band 7. A thin rubber tube 8 communicating with the pressure sensing portion is pulled out from the pressure measuring device 6. A thin hollow needle 9 having a sharp tip is attached to the tip of the rubber tube 8. The needle 9
The total internal volume of the rubber tube 8 is about 0.7 ml. The total internal volume may be 10% or less of the volume of the space (head space) formed in the upper part of the sample can. The volume of the head space is 350 m.
24 to 25 ml for 1 can and 16 to 17 ml for 250 ml
Has become.

Inside the pressure measuring device 6, in addition to the pressure sensing section, a conversion section for converting a pressure value sensed by the pressure sensing section into an electric quantity, and an electric quantity converted by the converting section. And a power supply unit that supplies power to the conversion unit and the storage unit.

Then, as shown in FIG. 1, the needle 9 is
After the lid 3 is hermetically attached to the can body 2, the blind plug 5 is penetrated and inserted into the sample can, whereby the inside of the sample can and the pressure sensing portion are communicated with each other.
The blind plug 5, the rubber tube 8 and the needle 9 constitute the pressure introducing portion of the present invention.

Further, as shown in FIG. 1, before the lid 3 is attached, a temperature measuring element 10 for continuously measuring and recording the liquid temperature is put in the beverage 11 filled in the can body 2. Has been done.

The shape and mounting structure of the blind plug 5 will be described with reference to FIG. A groove 14 extending in the circumferential direction is formed on the outer peripheral portion of the blind plug 5, and the opening edge of the through hole 4 is housed in the groove 14, and the blind plug 5 is positioned and held by the lid body 3. It has become so. Also, the blind plug 5 and the lid 3
The adhesive 13 is applied to the contact area of the
This makes the airtightness inside and outside the can perfect. In addition, a cylindrical recess 1 is formed at the end of the blind stopper 5 on the inner side of the can.
5 is formed, and the thickness of the end of the blind stopper 5 on the outside of the can is reduced so that the needle 9 can be easily inserted.

Next, the operation of this embodiment will be described.

As shown in FIG. 4, a can A as a product filled with a beverage and sealed is a belt-shaped conveyor belt 1
It is placed on the sheet 7 and conveyed in the direction indicated by the arrow in the figure.
Then, the can A passes through the heating furnace 16 provided in the middle of the conveyor belt 17, and is heated to heat and sterilize the beverage in the can A.

At this time, a predetermined number (1000 to 100)
One sample can with (00) cans A is placed on the conveyor 17 together with the cans A and conveyed, and subjected to heat treatment under the same heating conditions as the cans A. The temperature rise of the beverage due to this heating is continuously measured by the temperature measuring element 10. Based on the measurement result, it is determined whether or not a predetermined sterilization is performed. Furthermore, since the pressure sensing part of the pressure measuring device 6 and the inside of the sample can are connected by the rubber tube 8 and the needle 9, the internal pressure in the sample can is continuously measured by the pressure sensing part of the pressure measuring device 6. , Is continuously converted into an electric quantity by the conversion unit and is sequentially stored in the storage unit. Then, after the heating process is completed, the memory in the storage unit is read out and displayed as a graph using a printer or the like. The suitability of the gas filling process is determined based on the measurement result.

According to the present embodiment, the through hole 4 is formed so as to penetrate the lid 3 of the sample can, and the blind plug 5 made of an elastic material is fitted and inserted into the through hole 4 while maintaining airtightness. Because
Like the normal can A, the lid 3 can be hermetically attached to produce a sample can.

Further, according to the present embodiment, the hollow needle 9 is inserted into the blind plug 5 which is inserted in advance through the blind plug 5, and the needle 9 is connected to the pressure sensing portion of the pressure measuring device 6. Therefore, the needle 9 can be inserted into the blind plug 5 with a simple operation,
The inside of the sample can and the pressure sensing unit of the pressure measuring device 6 can be easily connected via the needle 9. Since the blind plug 5 is made of an elastic material, it is in close contact with the outer surface of the inserted needle 9 to maintain airtightness.

Further, according to the present embodiment, since the head space of the can and the pressure sensing portion of the pressure measuring device 6 are connected by the needle 9 and the rubber tube 8 having an inner volume of a minute volume, in the conventional case. The internal pressure can be accurately measured without the measured pressure becoming smaller than the actual pressure value unlike the measurement using the Bourdon tube pressure measuring device.

Further, according to this embodiment, the pressure measuring device 6
Is integrally fixed to the outer surface of the can body 2, so that the internal pressure of the sample can can be continuously measured while the sample can is being transported.

Next, FIG. 5 shows another embodiment of the can internal pressure measuring device of the present invention. The same components as those in the above-described embodiment are designated by the same reference numerals and described.

In this embodiment, a pressure measuring device 6 fitted and fixed to a lid 3 attached to a can body 2 of a sample can, and a pressure sensing portion of the pressure measuring device 6 penetrating the lid 3 And a needle 9 communicating with the inside of the sample can. A blind stopper 5 made of an elastic body is fitted and inserted into a portion of the lid body 3 corresponding to the needle 9 as in the above embodiment, and when the pressure measuring device 6 is put on the lid body 3 from above, Needle 9 is blind plug 5
To communicate with the inside of the sample can. The needle 9 and the blind plug 5 compose the pressure introducing portion of the present invention.

In this embodiment, the pressure measuring device 6 has the same effect as that of the above-described embodiment, and the pressure measuring device 6 is simply fitted and fixed on the upper surface of the lid body 3. Since there is no means for fixing to the sample can, the structure is simple and the mounting work is simple, and since no protrusions are formed on the outer surface of the sample can, the can A placed on the conveyor 17 is
It has an effect that it can be stably transported without interfering with.

In the above two embodiments, the blind plug 5
Is inserted into the lid body 3 (upper lid) attached to the upper portion of the can body 2, but may be inserted into the lid body (lower lid) attached to the lower portion of the can body 2. Also,
In the case of a can of the type in which the lid 3 is attached to the opening of the bottomed cylindrical can body, the blind plug 5 may be provided on the bottom of the can body.

In each of the above embodiments, the pressure measuring device 6 is integrated with the sample can. However, the sample can and the pressure measuring device 6 are formed separately, and the pressure measuring device 6 and the sample are You may make it connect with a can via a pressure introduction part. In this case, the internal pressure of the can is measured by flowing the sample can and the pressure measuring device 6 together with the can as the product. This is applied when the pressure measuring device 6 becomes large with respect to the sample can.

[0038]

As described above, according to the can internal pressure measuring device of the present application, the internal pressure in the sample can can be continuously measured, and therefore, the labor for sampling the can can be omitted and the can can be continuously measured. The obtained data can be obtained, the utility value of the measurement result can be enhanced, and the internal pressure of the sample can can be accurately measured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a can internal pressure measuring device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of FIG.

FIG. 3 is a plan view showing a lid body 3 used in FIG.

FIG. 4 is an explanatory diagram showing a method of using the internal pressure measuring device of FIG.

FIG. 5 is a sectional view showing a can internal pressure measuring device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Can Internal Pressure Measuring Device 2 Can Main Body 3 Lid 4 Through Hole 5 Blind Stopper (Pressure Introducing Section) 6 Pressure Measuring Instrument 8 Rubber Tube (Pressure Introducing Section) 9 Needle (Pressure Introducing Section)

Claims (6)

[Claims] 1. A pressure measuring device integrally fixed to a sample can that is subjected to the same treatment step as a product can, a pressure sensing part of the pressure measuring device, and the inside of the sample can are communicated with each other in a minute volume. An internal pressure measuring device for a can, comprising: 2. The can internal pressure measuring device according to claim 1, wherein the pressure measuring device is fixed to the outer surface of the sample can. 3. The can internal pressure measuring device according to claim 1, wherein the pressure measuring device is fitted and fixed to the lid of the sample can. 4. A blind plug made of an elastic material is inserted into a through hole penetrating the bottom of a lid or a can body of a sample canister while keeping airtightness, and the pressure introducing part is thin. The can according to claim 1, wherein a hollow needle is inserted through the blind plug, and the needle is connected to the pressure sensing portion of the pressure measuring device with a minute volume. Internal pressure measuring device. 5. A pressure measuring device, which is configured separately from a sample can that is made to flow in the same processing step as a product can, and is made to flow in the same processing step simultaneously with the sample can, and a pressure sensing part of the pressure measuring device. A can internal pressure measuring device, comprising: a pressure introducing portion that communicates with the inside of the sample can in a minute volume. 6. The pressure measuring device comprises: a pressure sensing part for sensing pressure; a conversion part for converting a pressure value sensed by the pressure sensing part into an electric quantity; and an electric quantity converted by the conversion part. The can internal pressure measuring device according to claim 1, further comprising a storage unit that sequentially stores and a power supply unit that supplies electric power to the conversion unit and the storage unit.