JP4769074B2 - UV irradiation sterilizer - Google Patents

Description

The present invention relates to an ultraviolet irradiation sterilization apparatus that performs sterilization and the like by irradiating ultraviolet rays onto a planar body such as a separation sheet or a pallet on which an object to be processed is placed.

  For example, in a beverage manufacturer, bottles (containers) before filling with beverages are stored or transported in a stacked state as shown in FIG. That is, in this case, a large number of bottles 1 are stacked in a plurality of stages via separate sheets 2 and stored or transported in a state where they are packaged in one pack 3.

  In such a form, the separate sheet 2 is in close contact with the drinking mouth 1a of the bottle 1 as is apparent in the figure. When the separate sheet 2 is contaminated with microorganisms, the drinking mouth 1a of the bottle 1 is It will surely be contaminated.

  Separation sheets that have been used in beverage factories and pallets, etc., on which such separation sheets are placed are often stacked and placed in the factories as they are. When the separate sheet is reused, there is a great possibility that the bottle is contaminated with microorganisms attached to the separate sheet.

Therefore, conventionally, an apparatus for sterilizing the separate sheet has been proposed. As this type of sterilization apparatus, for example, there is one as disclosed in the following Patent Document 1, that is, in the apparatus of this Patent Document 1, sterilization is performed by irradiating a separate sheet with ultraviolet rays, which is a type of electromagnetic wave. I have to.
JP 2003-160111 A

  However, in such a conventional sterilization apparatus, it is not possible to confirm whether or not the amount of ultraviolet rays that can be reliably sterilized is irradiated on the separation sheet as the object to be processed. Therefore, in the past, it was possible to manage only to the extent that it was supposed to be irradiated with that much ultraviolet ray, believing in the numbers indicated by the device manufacturer.

  The present invention has been made in view of such points, and in a device that performs sterilization or the like by irradiating electromagnetic waves (ultraviolet rays) to a planar body such as a pallet or the like on which a separation sheet or an object to be processed is placed. It is an object of the present invention to provide an apparatus capable of accurately measuring the irradiation intensity and irradiation amount of electromagnetic waves irradiated to an object.

To achieve the above object, the ultraviolet irradiation sterilizer of the present invention, the processing object is a planar body of pallets placing a separate sheet and objects, a conveying means for conveying the treated object by the conveying means the processing object to be conveyed, and ultraviolet generating source wavelength range is irradiated with 260nm ultraviolet from 250 nm, and an ultraviolet sensor for outputting a detection signal by detecting the intensity of the ultraviolet ray emitted from the ultraviolet generating source, the and a UV detection sub sensor for outputting a detection signal by detecting the intensity of the ultraviolet rays emitted from the superior and ultraviolet generating source to the durability against ultraviolet light than ultraviolet sensor. Also, using the UV intensity detected by the UV detection sensor as a reference value of the UV intensity emitted from the UV source, the percentage of the UV intensity detected by the UV detection sub-sensor is obtained, together with the UV intensity detected by the UV detection sensor. And a display unit for displaying the percentage obtained by the ultraviolet detection subsensor . Here, the ultraviolet ray detection sensor is located on the side opposite to the object to be processed as viewed from the ultraviolet ray generation source, and receives a ultraviolet ray having an intensity substantially equal to the ultraviolet ray irradiated to the object to be treated from the ultraviolet ray source. is installed, UV detection sub-sensor is either placed in the vicinity of the UV source, or fixed to have been installed in the UV source. Then, from the percentage detected and displayed by the ultraviolet detection subsensor , the ultraviolet irradiation intensity or the ultraviolet irradiation amount irradiated to the processing object is obtained by calculation and displayed on the display unit.

In a preferred form the ultraviolet irradiation sterilizer of the present invention, the ultraviolet sensor is provided with a shielding member for shielding the ultraviolet rays from the ultraviolet ray source, Likewise, UV detection sub sensor shielding ultraviolet rays from the ultraviolet generating source A shielding member is provided.
Further, in another preferable embodiment of the ultraviolet irradiation sterilization apparatus of the present invention, a pair of guide bars for holding the posture at the time of transport of the processing object is provided on both sides of the transport path of the processing object, The pair of guide bars are installed so as to be inclined with respect to the conveyance direction of the processing object.

  According to the ultraviolet irradiation sterilization apparatus of the present invention, it is possible to accurately measure the irradiation intensity and irradiation amount of ultraviolet light irradiated to the object to be processed from the ultraviolet ray generation source, and know the irradiation intensity and irradiation amount of the ultraviolet light.

In the ultraviolet irradiation sterilization apparatus according to a preferred embodiment of the present invention, the ultraviolet detection sensor is provided with a shielding member that shields the ultraviolet rays from the ultraviolet ray generation source, so that the portion receiving the ultraviolet rays can be provided while the ultraviolet detection sensor is resting. It can be covered and protected by this shielding member, thereby extending the life of the ultraviolet detection sensor.

In the ultraviolet irradiation sterilization apparatus according to a preferred embodiment of the present invention, a pair of guide rods for holding the posture at the time of transport of the processing object is provided on both sides of the transport path of the processing object, Since it is installed so as to be inclined with respect to the conveyance direction of the object, this guide rod does not block the same position of the object to be treated when irradiating with ultraviolet light, and the entire surface of the object to be treated is reliably irradiated with ultraviolet light. Efficient sterilization.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Here, as an example of the ultraviolet irradiation sterilizer , a separate sheet sterilizer for sterilizing the separate sheet 2 described above with reference to FIG. 11 will be described. In general, a separate sheet is a flat body made of a paper base material or plastic, and irradiates the front and back surfaces with ultraviolet rays to perform quick and reliable sterilization.
Here, the electromagnetic wave includes a wavelength region of at least 100 nm to 3.5 μm, and in particular, ultraviolet rays (100 to 400 nm) that are particularly excellent in sterilization action are used to sterilize the separate sheet.

  FIG. 1 shows a schematic configuration of a separate sheet sterilizer according to the present invention, that is, the separate sheet sterilizer includes a sheet inlet portion 11, a central processing portion 12 having an ultraviolet irradiation unit 30, a sheet outlet portion 13, , And conveyors 14, 15 and 16 serving as separate sheet conveying means are horizontally installed in each part.

  In this separate sheet sterilizing apparatus, the unprocessed separate sheets 2 stacked on the unprocessed sheet pallet 17 are lifted upward, and are vertically raised one by one on the conveyor 14 of the sheet inlet portion 11. As a result, the separate sheet 2 is conveyed from the sheet inlet 11 to the sheet outlet 13 through the central processing unit 12 by the conveyors 14, 15, and 16, and when passing through the central processing unit 12, the ultraviolet irradiation unit 30. Then, the separation sheet 2 is irradiated with ultraviolet rays to be sterilized. After this sterilization process is performed, the separate sheet 2 is automatically lowered from the conveyor 16 of the sheet exit portion 13 and stacked on the processed sheet pallet 18 in an organized manner.

  Further, in this separate sheet sterilizing apparatus, a display panel 20 is provided as a display unit on the front surface of a control box 19 for controlling the operation thereof, and the operation status of the apparatus, the irradiation intensity and the irradiation amount of ultraviolet rays, and the like are displayed thereon. It has become so. The display panel 20 can be arranged at any other place where it is easy to manage (for example, the front surface of the exterior of the central processing unit 12).

  FIG. 2 is a plan view showing the configuration of the central processing unit 12 in the separate sheet sterilizer of this example. The central processing unit 12 is provided with a pair of rollers 22 and 23 for coarse dust removal and conveyance assist that are driven to rotate at a speed synchronized with the conveyor. The separation sheet 2 is sent into the central processing unit 12 through the gap. Further, a pair of brush rollers 24 is provided between the pair of rollers 22 and 23. By passing the separate sheet 2 between the pair of brush rollers 24, dust adhering to the separate sheet 2 is removed. I try to remove it completely.

  An ultraviolet irradiation unit 30 for irradiating the separation sheet 2 with ultraviolet rays is installed inside the central processing unit 12 in the middle of the conveyance path through which the separation sheet 2 passes. The ultraviolet irradiation unit 30 includes an ultraviolet lamp 31 as an ultraviolet ray generation source, and the separate sheet 2 is irradiated with ultraviolet rays from the ultraviolet lamp 31 to be sterilized. Here, the ultraviolet irradiation unit 30 is disposed symmetrically on both sides of the transport path of the separate sheet 2 so that the front and back surfaces of the separate sheet 2 can be irradiated with ultraviolet light.

  A pair of guide rods 25 for holding the posture of the separate sheet 2 is installed in the conveyance path of the separate sheet 2 in the central processing unit 12 including the ultraviolet irradiation unit 30. The pair of guide rods 25 extend from immediately after the conveyance auxiliary roller 23 near the entrance of the central processing unit 12 to the exit of the central processing unit 12, and the separate sheet 2 passes between the pair of guide rods 25. By passing, it is stably conveyed in a vertical standing posture while maintaining a certain distance from the ultraviolet lamp 31 of the ultraviolet irradiation unit 30.

  In this configuration, as shown in FIG. 1, the guide bar 25 is installed so as to be inclined with respect to the conveying direction of the separate sheet 2 and the position of the ultraviolet lamp, whereby the guide bar 25 is separated at the time of ultraviolet irradiation. The same position is not obstructed, and the entire surface of the separate sheet 2 is reliably irradiated with ultraviolet rays.

  Further, as shown in FIG. 2, the pair of guide rods 25 is formed in a shape in which the interval between the end portions 25a on the inlet side is widened, whereby the separate sheet conveyed from the inlet side of the central processing unit 12 is formed. 2 is smoothly introduced between the pair of guide rods 25 and is transported in a stable state. Further, the pair of guide bars 25 may have a shape in which the interval between the end portions on the outlet side is widened. In that case, the separate sheet 2 is more smoothly discharged from between the pair of guide bars 25. .

  Further, in the central processing unit 12, passage sensors 26 and 27 for detecting the passage of the separation sheet 2 are installed on the inlet side and the outlet side of the ultraviolet irradiation unit 30. Here, the separation sensors 26 are separated by the passage sensor 26 on the inlet side. It is detected that the sheet 2 enters the area of the ultraviolet irradiation unit 30, and the passage sensor 27 on the exit side detects that the separate sheet 2 has left the area of the ultraviolet irradiation unit 30. .

  Further, in the central processing unit 12, air supplied from a blowing means such as an air blower or a compressor is blown from the air supply port 28 toward the ultraviolet lamp 31 and the ultraviolet irradiation unit 30, and the ultraviolet lamp 31 is cooled by this air. It has come to be. The air after cooling the ultraviolet lamp 31 is discharged from the exhaust duct 29 to the outside.

  3 and 4 are a side view and a front view showing the configuration of the ultraviolet irradiation unit 30. FIG. In this ultraviolet irradiation unit 30, as shown in FIG. 3, an ultraviolet lamp 31 formed in an elongated tubular shape is used as an ultraviolet light source, and this is arranged in parallel with the conveying direction of the separate sheet 2. In this case, in this example, seven ultraviolet lamps 31 are arranged in the vertical direction at equal intervals so that the separate sheet 2 can be irradiated with ultraviolet rays from any direction. In the ultraviolet irradiation unit 30, the ultraviolet lamps 31 may be arranged so as to be orthogonal to or inclined with respect to the conveying direction of the separate sheet 2, and the number thereof may be singular. As shown in FIG. 4, the ultraviolet irradiation unit 30 is installed symmetrically on both sides of the conveyance path of the separate sheet 2, thereby irradiating the front and back surfaces of the separate sheet 2 uniformly and uniformly with ultraviolet rays. Efficient sterilization is performed.

As the ultraviolet lamp 31 used in the ultraviolet irradiation unit 30, an ultraviolet lamp that emits ultraviolet light including a wavelength region of 250 to 260 nm, which has the greatest bactericidal effect, is used. In this case, if the separate sheet is excessively irradiated with ultraviolet rays, the separate sheet may be deteriorated. Therefore, the output of the ultraviolet lamp 31 and the separate are adjusted so that an appropriate ultraviolet ray irradiation amount (35 to 50 mW · s / cm ² ) is obtained. The design takes into account the distance between the sheet 2 and the ultraviolet lamp 31. Here, the UV lamp 31 can be easily replaced when the output decreases due to its life, so that the separate sheet 2 is always reliably irradiated with UV rays.

  In particular, in the separate sheet sterilizer of this example, the ultraviolet ray detection unit 32 for measuring the irradiation amount of the ultraviolet rays irradiated on the separate sheet 2 is installed in the ultraviolet irradiation unit 30 described above. The ultraviolet detection sensor 32 is an ultraviolet intensity meter that receives ultraviolet rays at the light receiving unit 32a, detects the intensity of the ultraviolet rays, and outputs the numerical value. As will be described later, the ultraviolet detection sensor 32 calculates based on the output from the ultraviolet detection sensor 32. The numerical value of the irradiated amount of ultraviolet rays is displayed on the display panel 20 shown in FIG.

  In this example, one ultraviolet detection sensor 32 is installed in the center of each of the ultraviolet irradiation units 30 on both sides, thereby measuring the amount of ultraviolet irradiation irradiated on each of the front side and the back side of the separate sheet 2. I am doing so. Here, the ultraviolet detection sensor 32 is installed at a position where the separate sheet 2 does not pass, and a position where the ultraviolet ray 31 is irradiated with ultraviolet rays having an intensity substantially equal to that of the ultraviolet rays irradiated on the separate sheet 2. Specifically, as shown in FIG. 5, the ultraviolet detection sensor 32 is located on the opposite side of the separation sheet 2 with the ultraviolet lamp 31 in between, and the distance a from the ultraviolet lamp 31 is at a distance a between the separation sheet 2 and the ultraviolet lamp. 31 at a position substantially equal to the distance b between

  With the separate sheet sterilizing apparatus of this example, the ultraviolet ray emitted from the ultraviolet lamp 31 toward the side opposite to the separate sheet 2 when the ultraviolet ray is irradiated, that is, the separate sheet 2 is formed. The ultraviolet ray detection sensor 32 receives ultraviolet rays that are not used for sterilization and measures the irradiation amount of the ultraviolet rays. Here, the ultraviolet ray detection sensor 32 has a distance a from the ultraviolet lamp 31 that is separated from the separate sheet 2 and ultraviolet rays. Since it is installed at a position substantially equal to the distance b between the lamp 31 and the ultraviolet rays received by the separate sheet 2, the ultraviolet rays having substantially the same intensity as the ultraviolet rays received by the separate sheet 2 are received. Irradiation dose can be measured.

  Thus, in the separate sheet sterilizer of this example, the irradiation amount of the ultraviolet rays irradiated from the ultraviolet lamp 31 onto the separate sheet 2 can be accurately measured with a simple configuration. In the configuration of this example, one ultraviolet detection sensor 32 is installed in each of the ultraviolet irradiation units 30 on both sides. However, if possible, this ultraviolet detection sensor 32 is located at three locations on one side, upper, middle, and lower. It is preferable to install a total of 6 or more. In that case, it becomes possible to measure the ultraviolet irradiation amount with higher accuracy.

  By the way, the ultraviolet intensity meter used for the ultraviolet detection sensor 32 in the above configuration is weak against long-time ultraviolet irradiation, that is, when the ultraviolet irradiation is performed for a long time, there is a possibility that the light receiving unit breaks down and malfunctions. Therefore, in the ultraviolet detection sensor 32, when the sensor is not used, it is necessary to cover the light receiving portion 32a with a shielding member to shield the ultraviolet rays.

  FIG. 6 shows an example of the configuration, that is, here, a sliding shutter 33 is attached to the ultraviolet detection sensor 32 as a shielding member. The shutter 33 is made of a material that does not transmit ultraviolet rays, such as stainless steel or a resin resistant to ultraviolet rays. When the ultraviolet detection sensor 32 is used, the shutter 33 is opened to expose the light receiving portion 32a as shown in FIG. When the sensor 32 is not used, the light receiving portion 32a is covered by sliding and closing the shutter 33 as shown in FIG. In this case, the shutter 33 may be opened and closed automatically. The shutter 33 is not limited to the slide type, and may be configured to open and close by a rotary type. In addition, a blind or a door shutter may be used as long as it shields ultraviolet rays.

  Since the shutter 33 covering the light receiving part 32a of the ultraviolet detection sensor 32 is provided in this way, the light receiving part 32a can be covered and protected by the shutter 33 while the ultraviolet detection sensor 32 is resting. The lifetime of the ultraviolet detection sensor 32 can be extended.

  As described above, since the ultraviolet detection sensor 32 is difficult to use at all times, it is used for periodic confirmation. That is, the shutter 33 is opened about once or twice a month, and an accurate ultraviolet ray irradiation amount is measured using the ultraviolet ray detection sensor 32 to confirm whether or not the reliable sterilization is performed.

  In the separate sheet sterilizer of this example with respect to such an ultraviolet detection sensor 32, an ultraviolet detection subsensor 34 having higher durability against ultraviolet rays than the ultraviolet detection sensor 32 is installed so that the irradiation amount of ultraviolet rays can always be measured. It is.

  As shown in FIG. 3, the ultraviolet detection sub-sensor 34 is installed in the vicinity of the end of an arbitrary ultraviolet lamp 31 (three ultraviolet lamps in the uppermost, lowermost, and middle stages) in the ultraviolet irradiation unit 30. The The ultraviolet detection subsensor 34 may be fixed to a part or all of the ultraviolet lamp 31. The ultraviolet detection subsensor 34 used here is an inexpensive sensor that detects ultraviolet rays and outputs a voltage corresponding to the intensity thereof. The amount of ultraviolet irradiation based on the output from the ultraviolet detection subsensor 34 is shown in FIG. Displayed on the display panel 20 shown. In this case, the irradiation amount is displayed as a percentage (%) with respect to a preset reference value, as will be described later.

In this way, in the separate sheet sterilizer of this example, the ultraviolet ray irradiation amount is obtained by using the ultraviolet ray detection subsensor 34 that is strong against ultraviolet ray irradiation for a long continuous time in a state where the ultraviolet ray detection sensor 32 that is weak against ultraviolet ray irradiation for a long time is normally rested. Can be measured. In the configuration of this example, the ultraviolet detection sub-sensor 34 is installed only on some of the ultraviolet lamps 31, but this may be installed on all the ultraviolet lamps 31, and in that case, the accuracy is much higher. It is possible to measure the amount of ultraviolet irradiation. Further, similarly to the ultraviolet detection sensor 32 described above, a shutter is attached to the ultraviolet detection subsensor 34 as a shielding member that covers the ultraviolet light receiving portion. When the ultraviolet detection subsensor 34 is resting, the shutter is used to shield ultraviolet rays. It is preferable to protect the light receiving part. By doing so, it is possible to extend the lifetime of the ultraviolet detection subsensor 34 together with the ultraviolet detection sensor 32.

  FIG. 7 shows the configuration of the measurement system of the ultraviolet irradiation amount in the separate sheet sterilization apparatus of this example, that is, here, based on the outputs of the ultraviolet detection sensor 32 and the ultraviolet detection subsensor 34, the microprocessor (calculation unit). ) 35, an ultraviolet irradiation amount calculation process is performed, and the result is displayed on the display panel 20 as a display unit.

In this case, when the measurement is performed by the ultraviolet detection sensor 32, the microprocessor 35 detects the time during which the separate sheet passes between the passage sensor 26 on the entrance side and the passage sensor 27 on the exit side, thereby reducing the emission length of the ultraviolet lamp. The passage time is calculated, and the irradiation of ultraviolet rays is performed based on the passage time between the lamp emission lengths and the output value (ultraviolet intensity) from the ultraviolet detection sensor 32 when the center of the separate sheet comes to the center of the lamp emission length. The amount is calculated and the numerical value ( mW · s / cm ² ) is displayed on the display panel 20.

On the other hand, when measurement is performed by the ultraviolet detection subsensor 34, the output value is converted into a percentage (%) with respect to a preset reference value based on the output voltage from the ultraviolet detection subsensor 34, and the value is converted into the amount of ultraviolet irradiation. Is displayed on the display panel 20. In this case, when it is confirmed that a sufficient amount of ultraviolet rays are irradiated by the measurement by the ultraviolet ray detection sensor 32 when the center of the separate sheet comes to the center of the lamp emission length when the separate sheet passes. The output voltage of the UV detection subsensor 34 is preset as a reference voltage value, the current output voltage value of the UV detection subsensor 34 is divided with respect to the reference voltage value, and the value is expressed in percentage (%). The information is displayed on the display panel 20. In addition, the output value based on the percentage (%) is displayed as a numerical value ( mW · s / cm ² ) by back calculation.

Therefore, in the separate sheet sterilizing apparatus of this example, the ultraviolet irradiation amount based on the output of the ultraviolet detection subsensor 34 is normally displayed on the display panel 20 as a percentage (%), and the ultraviolet irradiation based on the output of the ultraviolet detection sensor 32 is performed when necessary. A numerical value of the amount ( mW · s / cm ² ) is displayed on the display panel 20. Here, the display panel 20 includes a touch panel, and the display is switched by touching the screen. Thus, in the separate sheet sterilizer of this example, the irradiation amount of the ultraviolet rays displayed on the display panel 20 can be easily confirmed visually. In addition, when the ultraviolet ray detection sub sensor 34 outputs a measurement value while the ultraviolet ray detection sensor 32 is resting, the percentage (%) is calculated backward and displayed as a numerical value ( mW · s / cm ² ), and this is correct periodically. Whether or not the correction can be confirmed by the output of the ultraviolet detection sensor 32 can be confirmed.

  8 to 10 show examples of screens displayed on the display panel 20. First, FIG. 8 shows a top screen displayed in a normal state. Here, the sheet display unit 41 and the lamp display unit 42 are the separate sheet 2 arranged as shown in FIG. 4 and the seven ultraviolet lamps 31 on both sides thereof. In this case, in a state in which the ultraviolet lamp 31 is lit, the lamp display unit 42 is lit and displayed in blue, for example, and the separate sheet 2 is in the ultraviolet irradiation area (with the passage sensor 26 on the entrance side in FIG. 2). The sheet display unit 41 is lit and displayed in red, for example, when it is irradiated with ultraviolet rays through the outlet side passage sensor 27). Further, the cumulative lighting time of each ultraviolet lamp 31 is displayed on the display portion 43 outside the lamp display section 42.

  In this top screen, the output values from the ultraviolet detection sub-sensors 34 installed in the upper, middle and lower ultraviolet lamps 31 are displayed on the display portion 44 between the sheet display section 41 and the lamp display section 42. It is displayed in percentage (%), and the average output value from the UV detection sub-sensors 34 at the upper, middle and lower positions is displayed on the display portion 45 above it. By looking at the display, it can be confirmed that reliable ultraviolet irradiation is being performed during normal operation. In particular, the output value is displayed as a percentage (%), so that it is very easy for an operator to understand.

When an accurate ultraviolet irradiation amount is measured by the ultraviolet detection sensor 32 when necessary, a measurement screen as shown in FIG. 9 is displayed by pressing the “ultraviolet detection sensor” button 46 on the top screen. On this measurement screen, the ultraviolet ray detection sensor 32 is activated by pressing the switch button 47 (the shutter 33 of the ultraviolet ray detection sensor 32 may be automatically opened at this time), thereby irradiating the separate sheet. The amount of UV irradiation is measured. The display panel 20 displays the deterioration status of the ultraviolet lamp, the failure display of the ultraviolet detection sensor 32 or the ultraviolet detection subsensor 34, the failure history, and the like.

At this time, the numerical value (mW / cm ² ) of the ultraviolet intensity output from the ultraviolet detection sensor 32 is displayed on the display screen 48 in the center of the sheet display unit 41 on the measurement screen. In this case, in a state where the separate sheet does not pass through the ultraviolet irradiation area, the ultraviolet detection sensor 32 receives the ultraviolet rays from the ultraviolet lamps on both sides, so that a higher output value is displayed than when the separation sheet passes. Then, the output intensity when the separate sheet passes through the ultraviolet irradiation area and the center portion of the separate sheet matches the center portion of the lamp emission length is displayed in 49c of the display portion 49 on the upper right of the measurement screen. Then, the passage time 49a between the sensors detected by the passage sensor 26 on the inlet side and the passage sensor 27 on the outlet side, the passage time 49b of the emission length of the ultraviolet lamp calculated from the time, and the output from the ultraviolet detection sensor 32 The ultraviolet irradiation intensity 49c applied and the ultraviolet irradiation amount 49d calculated based on the ultraviolet irradiation intensity and the light emission long passage time are displayed. By viewing this display, the operator can determine the appropriate irradiation amount for the separate sheet. It can be confirmed whether (35-50 mW * s / cm < ² > ) ultraviolet-ray is irradiated. The display portion 49 stores the previous numerical value until the next separate sheet is fed. Each time a separate sheet is fed and the sensor detects it, the display of this display portion 49 reliably displays the measurement output from the next to the next.

Further, when a “display calculation” button 50 is pressed from this measurement screen, a calculation screen as shown in FIG. 10 is displayed. In this calculation screen, the ultraviolet ray irradiation intensity (or the ultraviolet ray detection sensor 32) output from the ultraviolet ray detection sensor 32 when the separate sheet passes through the ultraviolet ray irradiation area and the center part of the separate sheet matches the central part of the lamp emission length. When not in use, the previous intensity) 51a is displayed, and the irradiation output value 51b obtained by averaging the outputs from the plurality of ultraviolet detection subsensors 34 is displayed, and the time for the separation sheet to pass the emission length of the ultraviolet lamp is set. When the “Calculation start” button 53 is pressed in a state where the value 52 is input, a calculation result 54 obtained by multiplying the output intensity at 100% based on the irradiation output value 51b by the time coefficient based on the time setting 2 is displayed. Is done. Based on the calculation result, an estimated dose 55 with a 100% dose of 50 mW · s / cm ² is displayed and a determination result 56 of the state of the ultraviolet lamp is displayed. In this case, the determination result 56 is NG when the irradiation amount according to the calculation result 54 is 68% or more and OK and 67% or less. The operator confirms the deterioration state of the ultraviolet lamp by looking at the determination result, and the lamp You can judge whether or not to exchange.

  Since the separate sheet 2 irradiated with ultraviolet rays by the separate sheet sterilization apparatus of the present example as described above is reliably sterilized, it does not contaminate the mouth 1a of the bottle 1 in the use state as shown in FIG. It can be used with confidence.

  As described above, as an example of the present invention, the sterilization apparatus for a separate sheet has been described, but this apparatus is not limited to a separate sheet, for example, a pallet or the like on which items such as a separate sheet and a bottle (container) are placed in a factory. It can be suitably used for sterilization.

  In addition to sterilization of separate sheets and pallets on which objects are placed, the present invention further includes, for example, sterilization of storage baskets, sterilization of conveyors, candy and confectionery to be transported on the conveyor, and paste products (rice cakes, hams, sausages). It can also be applied to sterilization and sterilization of the surface with eggs in a pack.

It is a schematic block diagram of the separate sheet sterilizer which shows the Example of the ultraviolet irradiation sterilizer by this invention. It is a top view which shows the structure of the center process part in the separate sheet sterilizer of an Example. It is a side view which shows the structure of the ultraviolet irradiation unit in the separate sheet sterilizer of an Example. It is a front view which shows the structure of the ultraviolet irradiation unit in the separate sheet sterilizer of an Example. It is explanatory drawing of the installation position of the ultraviolet detection sensor in the separate sheet sterilizer of an Example. In the separate sheet sterilizer according to the embodiment, the ultraviolet detection sensor is provided with a shutter, in which (A) shows a state where the shutter is open, and (B) shows a state where the shutter is closed. It is a block diagram of the measuring system of the ultraviolet irradiation amount in the separate sheet sterilizer of an Example. It is an example of the top screen displayed on a display part in the separate sheet sterilizer of an Example. It is an example of the measurement screen displayed on a display part in the separate sheet sterilizer of an Example. It is an example of the calculation screen displayed on a display part in the separate sheet sterilizer of an Example. It is explanatory drawing of a separate sheet.

Explanation of symbols

2 ... separate sheet (object to be processed) 14, 15, 16 ... conveyor (conveying means), 20 ... display panel (display unit), 25 ... guide bar, 31 ... ultraviolet lamp ( ultraviolet ray source), 32 ... ultraviolet detection Sensor 33 ... Shutter (shielding member) 34 ... Ultraviolet detection sub-sensor

Claims (4)

The object to be processed is a flat body such as a separate sheet or a pallet on which objects are placed,
Conveying means for conveying the processing object;
To the processing object which is conveyed by said conveying means, and ultraviolet generating source wavelength range is irradiated with 260nm ultraviolet from 250 nm,
An ultraviolet ray detection sensor that detects the intensity of ultraviolet rays emitted from the ultraviolet ray generation source and outputs a detection signal;
And ultraviolet detection sub sensor for outputting a detection signal by detecting an excellent and strong degree of UV emitted from the ultraviolet generating source to the durability against ultraviolet light than the ultraviolet sensor,
Using the ultraviolet ray intensity detected by the ultraviolet ray detection sensor as a reference value of the ultraviolet ray intensity emitted from the ultraviolet ray generation source, the percentage of the ultraviolet ray intensity detected by the ultraviolet ray detection subsensor is obtained, and the ultraviolet ray detected by the ultraviolet ray detection sensor is obtained. A display unit that displays the percentage obtained by the ultraviolet detection subsensor together with the intensity , and
The ultraviolet detection sensor is located on a side opposite to the object to be processed as viewed from the ultraviolet ray generation source, and receives a UV ray having an intensity substantially equal to the ultraviolet ray irradiated to the object to be processed from the ultraviolet ray generation source. And
The ultraviolet detection sub-sensor is installed in the vicinity of the ultraviolet generation source or fixed to the ultraviolet generation source,
From the percentage detected and displayed by the ultraviolet detection subsensor, the ultraviolet irradiation intensity or the ultraviolet irradiation amount irradiated to the object to be processed is obtained by calculation and displayed on the display unit.
An ultraviolet irradiation sterilizer characterized by that. The ultraviolet sensor includes a shielding member for shielding the ultraviolet rays from the ultraviolet ray source, an ultraviolet irradiation disinfection device according to claim 1. The UV detection sub-sensor is provided with a shielding member for shielding the ultraviolet rays from the ultraviolet generating source, UV irradiation sterilizer according to claim 1 or 2. A pair of guide bars for holding the posture at the time of transporting the processing object is provided on both sides of the transport path of the processing object,
The ultraviolet irradiation sterilization apparatus according to any one of claims 1 to 3, wherein the pair of guide bars are installed so as to be inclined with respect to a conveyance direction of the processing object.

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