JPS5939141B2 - Separate sheet cleaning and sterilization equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cleaning and sterilizing separate sheets used when cans containing drinking water or the like are stacked on a pallet and transported.

The cans manufactured at the iron making factory are transported to the food filling factory.
Filled with food.

When transporting such cans from an iron making factory to a food filling factory, the cans 1 are stacked and packed in multiple tiers on pallets 2, as shown in Figure 1, and there is no space between the tiers. It is common to use a separate sheet 3.

Therefore, in this case, the opening of the can 1, that is, the edge of the filling port of the can, comes into contact with the separate sheet 3, so if the surface is contaminated with dust or bacteria, it may come into contact with this. The can itself becomes contaminated with the dust and bacteria, which is undesirable in terms of food hygiene.

Therefore, when stacking cans on a pallet, the separate sheets inserted between each stage are generally cleaned with a sheet cleaner and brushed with a brush roll to clean their surfaces before being used on the pallet.

However, although this brush cleaning is effective for removing dust etc. adhering to the surface of the separate sheet, it does not have a bactericidal effect on bacteria, such as coliform bacteria, that may be adhering to the separate sheet. Therefore, there is a risk that coliform bacteria may be introduced into the can due to contact with the separate sheet, which puts a burden on the sterilization process after filling the food.

This invention was made in view of the above-mentioned circumstances, and is capable of reliably sterilizing coliform bacteria as well as dust on the surface of the separate sheet, and is quick in processing and easy to operate. The object of the present invention is to provide a separate sheet cleaning and sterilization device with a simple structure.

Corresponding to this purpose, the separate sheet cleaning and sterilizing device of the present invention has a passage through which the separate sheets pass one by one, and includes a rotating brush located along the passage and brushing the surface of the separate sheets passing through the passage. , and an ultraviolet irradiation lamp located along the passage and capable of irradiating ultraviolet rays onto the surface of the separate sheet passing through the passage.

The details of this invention will be explained below with reference to the drawings showing one embodiment.

As shown in FIGS. 2 and 3, the separate sheet cleaning and sterilizing device 11 of the present invention includes a separate sheet supply section 12
, cleaner part 13, sterilizer part 14, shipping part 15
It is equipped with

The separate sheet cleaning and sterilizing device 11 is provided with a plurality of pairs of feed rollers, and a virtual sheet feed path is formed between these feed rollers.

A supply table 23 is provided in the separate sheet supply unit 12, and a large number of separate sheets 3 are stacked on this supply table 23.

A pickup device 24 is provided at the top of the separate sheet supply section 12, and this pickup device 24 picks up the topmost separate sheet by vacuum suction using a suction cup, and also uses a feed roller 16 located at the entrance of the sheet feeding path. send to.

The supply table 23 rises as the height of the stack of separate sheets decreases so that the height of the uppermost separate sheet remains approximately constant.

In the cleaner part 13, a pair of rotating brushes 25 are located along the sheet feeding path, and a housing 26 is provided to house and surround the rotating brushes.

The internal space of the housing 26 communicates with a dust collector 28 via a duct.

On the outlet side of the rotating brush 25, a feed roller 17.
A seat holder 29 is provided along the path between the seat holders 18.

A sterilizer section 14 is provided adjacent to the cleaner section 13.

In the sterilizer section 14, - A plurality of sterilizing lamps 31a are arranged directly above the sheet feeding passage, and a plurality of sterilizing lamps 31b are arranged directly below the sheet feeding passage.

Germicidal lamp 31a. 31b emits light that has a sterilizing effect, and such light rays include ultraviolet rays with a wavelength of 253.7 nm.As a lamp that emits such light, for example, a commercially available product such as Toshiba GL15 (15W) is used. be able to.

In addition, the number, position, etc. thereof will be selected depending on the dose required to sterilize the bacteria on the separate sheet.

For example, when sterilizing E. coli, the required sterilization dose is 2.
9.0 P wisteria/cat.

Furthermore, an inspection window 32 is provided along the side surface of the sheet feeding path.

A sheet pedestal 33 is provided along the sheet feeding path at the exit side portion of the sterilizer section 14, and a feeding roller 22 is provided at the exit end of the sheet feeding path.

This feed roller 22 is designed to rotate at a slightly higher rotation speed than the other feed rollers.

A shipping section 15 is located on the exit side of the sterilizer section 14.

The unloading section 15 includes a movable table 34 that moves up and down,
This movable table gradually descends to receive and stack the separate sheets 3 discharged from the sterilizer section 14.

; In the separate sheet cleaning and sterilizing apparatus configured in this way, the separate sheets 3 stacked on the supply table 23 are picked up by the pickup device 24, inserted into the sheet feeding path, and passed through the sheet feeding path by the feeding roller. However, as a first step, both sides of the separate sheet are brushed by the rotating brush 25 in the cleaner part 13 to remove dust.

The removed dust is vacuum-sucked into a dust collector 28 through a duct 27.

The separate sheet, which has been brushed by the rotating blan 25 to remove dust from its surface, is then transferred to the sterilizer section 1.
Sent to 4.

In the sterilizer section 14, sterilizer lamps 31a, 31
The irradiation from b kills E. coli and other fungi adhering to the surface.

The separate sheets that have been sterilized in the sterilizer section are finally stacked on a stacking table 34 and then sent to a place of use.

Furthermore, if the separate sheet is coated with ink or paint that changes color when exposed to ultraviolet rays, that ink or paint will change color when exposed to ultraviolet rays in the sterilizer section, so check for this discoloration. You can easily confirm that the sterilization process has been completed.

Of course, it is not necessary to apply such ink or paint to all the separate sheets; for example, such treatment may be applied only to the separate sheet located at the top of the pallet.

Next, as an example of the above-mentioned separate sheet cleaning and sterilizing apparatus, the specifications of the apparatus will be shown in the case where the design standard is to sterilize mainly Escherichia coli adhering to the separate sheet by 90% using a sterilization lamp.

Line speed: 32.6 ml or sterilizing dose: 49.5 μwmm/(i Required sterilizing dose = 29.0 μW min/crjt Safety factor: Approximately 1.7 times (sterilizing effect changes depending on humidity conditions, etc.)

) Germicidal lamp model: Toshiba GLI 5 (15W) Number of germicidal lamps = 44 lights (22 lights each on the top and bottom sides) The germicidal line of the germicidal lamp is the resonance line of mercury!It has a wavelength of 253.
It refers to ultraviolet light of 7 nm (10'm).

Next, the sterilization effect in the sterilizer section will be demonstrated through experiments.

(a) Experimental method 1
Aβ with a sample tank mounting part of 15Crn x 15cIrL
Two plates A and B were prepared, and on the other hand, a sample collected from a human feces sample was diluted with 10 rnl of 5% sterile physiological saline,
This diluted sample was placed on the Al plates A, * and B at a distance of 1 m.
After irradiating ultraviolet light with a sterilizing lamp for A, and wiping it off with a cotton swab without applying ultraviolet heat for B, o, ss% sterile physiological saline 1011.
1 ml of the diluted sample was added dropwise and cultured in a multilayer plate.

For UV irradiation on A, as shown in Figure 4, align the center of the sample pricing section with the center of the three germicidal lamps, and
．． It was irradiated for 2 seconds.

The medium is a denoxycholate acid medium (for quantification of Ota bacteria group), and after dropping 111L of the diluted sample, approximately 30% of the medium is
The mixture was heated to 1150°C and solidified after mixing.

Thereafter, about 5 ml of the medium was further layered and solidified to prepare a medium.

Cultivation was at 37°C for 13±1 hours. (O) Experimental Results As is clear from the above explanation, according to the present invention, a separate sheet cleaning and sterilization device can be obtained.

Moreover, it is possible to obtain a cleaning and sterilizing device that can be processed quickly, has a simple structure, and is inexpensive.

[Brief explanation of drawings]

Fig. 1 is a side explanatory view showing a state in which cans are stacked using separate sheets, Fig. 2 is a plan view of the separate sheet cleaning and sterilizing device, Fig. 3 is a side view of the separate sheet cleaning and sterilizing device, and Fig. The figure is an explanatory plan view showing the ultraviolet irradiation state in the experiment. 11... Separate sheet cleaning sterilization device, 12
...Separate sheet supply section, 13...
・Cleaner part, 14... Sterilizer part, 15.
...Shipping section, 31a, 31b...Bactericidal lamp.

Claims (1)

[Scope of Claims] 1. It has a passage through which the separate sheets pass one by one, and includes a rotating brush located along the passage and brushing the surface of the separate sheets passing through the passage, and A separate sheet cleaning and sterilizing device comprising: an ultraviolet irradiation lamp that is located and can irradiate the surface of the separate sheet passing through the passage with ultraviolet rays. 2. The separate sheet cleaning and sterilizing device according to claim 1, wherein the ultraviolet irradiation lamp is provided downstream of the rotating brush in the direction in which the separate sheet passes. 3. The separate sheet cleaning and sterilizing apparatus according to claim 1 or 2, wherein the passageway is provided substantially horizontally, and the ultraviolet irradiation lamps are provided above and below the passageway.