JP2009028450A - Pass box equipped with germicidal lamp and its control procedure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple structure pass box with easy maintenance and excellent durability which performs a proper germicidal treatment of the whole surface of an article in a short period of time, and to provide its control procedure. <P>SOLUTION: The pass box is made of a box case set in a predetermined atmosphere and having doors facing inside and outside of a room, respectively, to deliver and receive articles between the outside and inside of the room through the box case wherein germicidal lamps are set at predetermined distances from the article on the inside surfaces of the six sides so as to irradiate the subject with ultraviolet rays from six sides of the inside of the box case, so that an electric circuit set for supply to the inside of the box case other than the doors with a contact point get in touch only the box case and doors is constituted in closed state so as to supply electric current to the germicidal lamps set on the each door to light on only the doors in closed state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pass box that includes a box having doors facing the indoor side and the outdoor side set to a predetermined atmosphere. The present invention relates to a pass box with a sterilization lamp that improves the sterilization ability in the box and a control method thereof.

  In the clean rooms of pharmaceutical-related pharmaceutical factories and laboratories, the internal pressure is set to a positive pressure so that germs do not enter from the outside. In the biohazard facility, the internal pressure is set to a negative pressure so that the microorganisms in the hazard are not released to the outside. A pass box is used to prevent the entry and exit of germs and microorganisms during delivery of articles between the inside and outside where such a pressure difference occurs.

  A conventional pass box has a box provided in a part of a side wall or the like constituting a clean room, an inner door and an outer door facing the clean room side and the outer side of the box, and an ultraviolet ray installed in the box. And a germicidal lamp for light emission. For example, when the article is carried into the clean room, the outer door is opened with the inner door closed, the article is placed in the box, the sterilization lamp is driven after the outer door is closed, and ultraviolet rays are emitted into the box. Irradiation is performed, and after a predetermined time has elapsed, the driving of the germicidal lamp is stopped, and then the inner door is opened and the article is taken into the clean room. As a result, the articles in the box are sterilized by being irradiated with ultraviolet rays, and then are carried into the clean room to prevent inadvertent entry of germs into the clean room. Moreover, when taking out articles | goods from a clean room, it is performed in the reverse order of the said procedure.

  A conventional pass box is configured such that a germicidal lamp for ultraviolet irradiation is installed at a specific location such as a ceiling portion or a side wall portion of the box, and ultraviolet rays are irradiated from the specific location into the box. Even if the germicidal lamp is driven with the article in the box, the surface of the article opposite to the germicidal lamp (so-called negative surface) or the surface placed on the box (so-called back side) is not directly irradiated with ultraviolet rays. become. In order to solve this problem, it may be possible to change the direction of UV irradiation by placing a reflector inside the box, but it is difficult to properly irradiate the entire surface of the article with UV rays. Proper sterilization treatment is not performed, and various germs are taken into the clean room, and there is a high possibility that the clean room is contaminated.

  In addition, sterilization by ultraviolet irradiation as in a conventional pass box is difficult to obtain a sufficient sterilization effect in a short time, and it takes a long time to properly sterilize the article. Delivery takes a long time, and it is inconvenient to carry in and out the goods.

  For the above problems, focusing on the sterilizing effect of ozone gas and applying it to the pass box, it is possible to easily perform an appropriate sterilizing treatment on the entire surface of the article and effectively prevent contamination in the clean room. In addition, Patent Document 1 discloses a pass box that can shorten the sterilization time. However, since ozone gas has an adverse effect on the human body depending on the concentration used, management such as neutralization of the gas after use is essential, and it is not actually adopted from the viewpoint of workability and management.

For this reason, at present, a wet type sterilization method in which a disinfectant is sprayed on the entire surface of the articles in the pass box is employed. However, the wet type sterilization method has the following disadvantages.
(1) Management of disinfectant is complicated and maintenance is difficult. For example, (a) disinfectant treatment is necessary (b) drying equipment for attached disinfectant, and installation of incidental exhaust dust is necessary (c) incidental equipment (D) Parts are frequently replaced. (E) Handling is complicated. (F) There are various problems such as safety measures such as disinfection liquid leakage, electric leakage, and air leakage.
(2) Since the liquid leaks inside the box and therefore it is necessary to provide a drain, the structure is complicated and expensive.
(3) The surface cleaning work on the inner surface of the box is difficult.

  Also, this type of pass box usually has wiring at the hinge part of the door, so if you open and close the door many times, this wiring part will break and there will be a problem with durability. is there.

JP 2000-254212 A

  In order to solve the above problems, the present invention easily performs appropriate sterilization treatment on the entire surface of the article, shortens the sterilization treatment time, and has a simple structure, easy maintenance, and excellent durability. It is an object to provide a pass box and a control method thereof.

In order to achieve the above object, as a result of intensive studies, the present inventors have determined from the article on the six sides so that ultraviolet rays are irradiated to the article from the six sides of the inner surface of the box. It was found that the object can be achieved by providing germicidal lamps arranged at intervals. In addition, when the germicidal lamps are provided on the six surfaces in this way, the number of germicidal lamps inside the box increases, and the germicidal lamps provided on the door appear outside the box when the door is opened. The sterilization lamp needs to be lit only when both doors are closed. Such lighting operation is controlled so that the sterilization lamp is lit only when both doors are closed, and when both doors are closed. It has been found that current can be supplied from a current supply circuit to a germicidal lamp provided inside the box other than the door through a contact point between the door and the box.
The pass box of the present invention has been made based on these findings, and as described in claim 1, the pass box comprises a box body having doors facing the indoor side and the outdoor side set in a predetermined atmosphere, A pass box for delivering an article between indoors and outdoors via a box, wherein the article is exposed to the six sides so that the article is irradiated with ultraviolet rays from the six sides of the inner surface of the box. A sterilization lamp arranged at a predetermined interval is provided, and a current supply circuit to the sterilization lamp provided inside the box other than the door is a contact point that contacts when the box and the door are in a closed state. It is configured so that a current can be supplied to the germicidal lamp provided in each door only through the door, and can be lit only when both the doors are closed.
Moreover, the pass box with a germicidal lamp according to claim 2 is the pass box with a germicidal lamp according to claim 1, wherein the germicidal lamps other than the germicidal lamp provided on the inner surface side of the door are arranged in the longitudinal direction of the article. It is aligned in the passing direction and is arranged in a tunnel shape that can surround the article.
Moreover, the pass box with a germicidal lamp according to claim 3 is a member having translucency in the pass box with a germicidal lamp according to claim 1 or 2, wherein the part in which the article is placed is placed in the box. It is configured, and a germicidal lamp is provided below the translucent member.
A pass box with a germicidal lamp according to claim 4 is the pass box according to any one of claims 1 to 3, wherein an air outlet is provided in a ceiling part or / and a side part of the box body, and the filter is filtered by a fan. The airflow cleaned in (1) can be circulated and supplied to the box.
Moreover, the control method of the pass box with a germicidal lamp according to the present invention comprises a box body having doors facing the indoor side and the outdoor side set to a predetermined atmosphere, as defined in claim 5. In a pass box for delivering an article between the interior and the exterior via a body, a predetermined interval from the article is arranged on the six sides so that ultraviolet rays are irradiated to the article from the six sides of the inner surface of the box. A current supply circuit to the germicidal lamp provided inside the box other than the door is provided only through a contact point that contacts when the box and the door are in a closed state. The sterilization lamp can be supplied with electric current to each of the doors, and the sterilization lamp is configured to be lit only when both the doors are closed. You can keep both doors closed while Characterized in that it locked in.

As described above, according to the present invention, the pass box is composed of a box body having doors facing the indoor side and the outdoor side set to a predetermined atmosphere, and the delivery of articles between the indoor and the outside through the box body. In addition, a germicidal lamp arranged at a predetermined interval from the article is provided on the six face side so that ultraviolet rays are irradiated to the article from the six face sides of the inner surface of the box. Since the entire surface of the article placed in the box is reliably sterilized, the entire surface of the article can be efficiently sterilized, and the sterilization treatment for the entire surface of the article can be effectively performed. It can be sterilized in a short time. In addition, maintenance is easy because no disinfectant is used, and since ozone gas is not used, the safety of workers is ensured and there is no need for a special neutralization device, so that a pass box with a simple structure can be provided at low cost. . Further, the current is supplied only through the contact between the door and the box from the current supply circuit to the germicidal lamp provided inside the box other than the door so that the germicidal lamp is lit only in the closed state of the both doors. Therefore, even when a germicidal lamp is provided on both doors, it is possible to reliably energize only when both doors are closed with a simple circuit configuration. In addition, when a blower outlet is provided in the ceiling or / and the side of the box so that the airflow cleaned by the fan can be circulated and supplied to the box, bacteria and the like adhere to the dust. In order to survive, the inside of the pass box can be cleaned with a clean air flow, and in combination with the sterilization treatment, contamination of the articles can be efficiently avoided.
Further, according to the control method of the present invention, in the above-mentioned pass box, both doors are locked while the germicidal lamp is lit, so that a safer pass box can be obtained.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged perspective view seen from the front side of the pass box of the present invention with the door opened, FIG. 2 is an enlarged front view of the door closed, FIG. 3 is a side view of the installed state, and FIG. FIG. 5 is an explanatory view showing the control of the current to the germicidal lamp. As well shown in FIGS. 3 and 4, the pass box 1 according to the present embodiment is used to deliver an article 4 between a clean room 2 as an indoor side set in a predetermined atmosphere and a general room 3 as an outdoor side. And is installed on the side wall 5 using leg members 18. However, the pass box 1 of the present invention is not limited to being installed between the clean room 2 and the general room 3, for example, between a room set in a predetermined gas atmosphere and a general room, or in a predetermined pressure atmosphere. It is also possible to install between a room set in the above and a general room.

  The pass box 1 of the present embodiment includes a clean room side door 7 on the clean room 2 side of the box body 6 and a general room side door 8 on the general room 3 side. These doors 7 and 8 are locks that lock the closed state. The lock mechanism 9 is provided with a selective unlocking mechanism 11 that allows only one of the doors 7 and 8 to be opened from the closed state. This selective unlocking mechanism 11 regulates that the doors 7 and 8 can be opened simultaneously, and prevents germs in the general room 3 from entering the clean room 2 inadvertently.

  A slit base 14 is provided as a light-transmitting member on the bottom surface 13 side of the inner wall 12 of the box body 6, and the article 4 can be placed on the slit base 14. On the bottom surface 13 below the slit base 14, germicidal lamps 20, 20 aligned in the longitudinal direction with respect to the passing direction of the article 4 are provided in parallel with an interval. Further, one germicidal lamp 20 is provided at the center of both side walls 15, 15 of the inner wall 12 and at the center of the ceiling 16, with the longitudinal direction thereof aligned with the passing direction of the article 4. Thus, the five germicidal lamps 20 provided on the bottom surface 13, the side walls 15, 15 and the ceiling 16 side are arranged in a tunnel shape that can surround the article 4. These five germicidal lamps 20 reliably irradiate the entire surface of the article 4 with ultraviolet rays.

In this embodiment, the germicidal lamps 20 and 20 are also provided on the inner surfaces of the doors 7 and 8. The inner wall 7 is preferably formed of a stainless steel member in order to reflect the ultraviolet rays irradiated from the sterilizing lamp 20 and further improve the sterilization efficiency. As shown in FIG. 5, the seven germicidal lamps 20 have a current supply circuit for lighting the germicidal lamp 20 on the main body side via a contact point with respect to the germicidal lamps 20 provided on the doors. It is configured so that it can be energized, and lights up only when both doors 7 and 8 are closed. The method of lighting only when the doors 7 and 8 are closed is not shown in the figure, but for example, the open / close state of the doors 7 and 8, the state of the following contacts a and b, whether or not there is a sensor or energization. After monitoring and detecting that both of the contacts a and b are in the closed state, current is supplied from the current supply circuit, or that both the doors 7 and 8 are in the closed state, 8 is locked, the germicidal lamp 20 is turned on, and the doors 7 and 8 are kept closed (not unlocked) while the germicidal lamp 20 is on. In addition, it is possible to save power by not turning on the germicidal lamp 20 only when the doors 7 and 8 are closed and the goods are transferred from the clean room 2 side to the general room side 3. it can.
A door-side contact a communicating with the sterilizing lamp 20 on each door 7, 8 side is provided on the inner upper side of each door 7, 8, and the door-side contact a on the ceiling side 16 of the box body 6 is provided. A box-side contact b is provided at each abutting position, and both doors 7 and 8 are closed, that is, only when the door-side contacts a and a and the box-side contacts b and b are all in contact. The sterilizing lamp 20 on the door 7 and 8 side is energized, and when either one of the doors 7 and 8 is opened, only the sterilizing lamp 20 on the door 7 or 8 side in the box 6 is Never irradiate ultraviolet rays. In the above embodiment, five sterilization lamps 20 are provided in the box 6 and one sterilization lamp 20 is provided for each door 7, 8. It goes without saying that the sterilizing power can be increased by increasing the number to any number.
In addition, about the position which provides the said contact, it is preferable to make the doors 7 and 8 other than the position in which opening-and-closing means, such as a hinge, are provided. This is because it is easy to detect the opening / closing operation without complicating the wiring.

  In addition, in the said Example, in order to hold | maintain a predetermined space between the articles | goods 4 and the germicidal lamp 20, the slit stand 14 was utilized, However, At this time, as the article 4 is mounted in the center vicinity of the slit stand 14. FIG. Then, the surface of the article 4 is more uniformly irradiated with the direct light of ultraviolet rays. Further, the table on which the article 4 is placed is not necessarily limited to the flat slit table 14, and a convex shape is formed in the vicinity of the center of the clamp wire net, the round net bar shelf (wire rack) or the punching plate. In addition, if the pedestal is formed so that the article can be placed on the convex portion, the distance between the article 4 and the germicidal lamp 20 can be equal, and the germicidal lamp 20 on the ceiling side and the bottom side The direct ultraviolet light from the sterilizing lamp 20 is more evenly applied to the article.

  It should be noted that a transparent or semi-transparent glass window may be provided on the side surfaces of the doors 7 and 8 and the box body 6 so that the inside of the box body 6 can be confirmed. 17 was provided. Further, as the germicidal lamp 20, a germicidal lamp that generates abundant ultraviolet rays having a wavelength of 253.7 nm can be used, but is not necessarily limited to the above.

  Next, the operation of the pass box 1 of the present invention will be described. In order to carry the article 4 into the clean room 2 from the general room 3 side, first, the general room side door 8 is opened and the article 4 is placed on the slit table 14 in the room. At this time, the germicidal lamp 20 is turned off. When the door 8 is closed, the germicidal lamps 20 arranged in a tunnel shape and the germicidal lamps 20 provided on the inner surfaces of the doors 7 and 8 are lit, and the longitudinal direction is aligned with the article transport direction and arranged in a tunnel shape. Even with the five sterilized lamps 20 alone, the upper and lower surfaces and side peripheral surfaces of the article 4 are sufficiently uniformly irradiated with ultraviolet rays to sterilize bacteria on or near the surface of the article 4. In the present embodiment, since the germicidal lamp 20 is also provided on the inner surfaces of the doors 7 and 8, irradiation of ultraviolet rays to the entire circumference of the article 4 becomes more reliable. Next, the clean room side door 7 is unlocked, the door 7 is opened, and the article 4 is carried into the clean room 2. At this time, the germicidal lamp 20 is turned off.

  Next, the example in which the article is irradiated with ultraviolet rays from all six sides of the pass box according to the above example is referred to as Example 1, and the four sides of the inner wall 12 excluding the inner surfaces of the doors 7 and 8 are changed to the article. On the other hand, what irradiated an ultraviolet-ray was made into Example 2, the comparative test was performed for the bactericidal capability of these Examples 1 and 2 using the comparative example, and bactericidal capability (time, disinfection efficiency, etc.) was relatively evaluated. In the comparative example, a pass box that irradiates the article with ultraviolet rays only from both sides of the inner wall of the box was used. As a result, in the pass box of Example 1, since ultraviolet rays were irradiated from the six inner surfaces, the bactericidal effect was great and only ultraviolet irradiation was sufficient. Even in the pass box of Example 2, the sterilization effect is slightly reduced compared to Example 1, and the irradiation time required for sterilization required about 1.5 times that of Example 1, In order to reliably irradiate the article with ultraviolet rays, a sterilization lamp whose longitudinal direction is aligned with the passing direction of the article is provided so as to surround the article in a tunnel shape. there were. On the other hand, in Comparative Example 1, since only two surfaces are irradiated, the sterilization effect is reduced, the irradiation time required for sterilization is three times that of Example 1, and the bottom surface of the article is further treated with a disinfectant solution, etc. It was necessary to perform secondary disinfection.

The enlarged perspective view seen from the front side of the state where the door of one example of the pass box of the present invention was opened Enlarged front view with the door closed Side view showing the installation state Plan view Explanatory diagram showing control of current to germicidal lamp

Explanation of symbols

1 pass box 2 medium chamber 3 pretreatment chamber 4 article 5 side wall 6 box 7 medium chamber side door 8 pretreatment chamber side door 9 locking mechanism 10 handle 11 selective unlocking mechanism 12 inner wall 13 bottom surface 14 slit base 15 side wall 16 ceiling 17 Window 18 Leg member 20 Sterilization lamp a Door side contact b Box side contact

Claims (5)

  A pass box comprising a box having doors facing the indoor side and the outdoor side set to a predetermined atmosphere, and passing goods between the indoor and outdoor through the box, the inner surface of the box A germicidal lamp disposed at a predetermined distance from the article on the six sides so that the article is irradiated with ultraviolet rays from the six sides, and provided inside the box other than the door. In addition, the current supply circuit to the germicidal lamp can supply current to the germicidal lamps provided on the doors only through the contacts that contact when the box and the door are in the closed state. A pass box with a germicidal lamp configured to be lit only when both the doors are in a closed state.   The germicidal lamps other than the germicidal lamps provided on the inner surface side of the door are arranged in a tunnel shape in which the longitudinal direction is aligned with the passing direction of the article and can surround the article. Pass box with germicidal lamp.   The portion of the box in which the article is placed is constituted by a member having translucency, and a germicidal lamp is provided below the member having translucency. Pass box with germicidal lamp as described in.   4. The air discharge device according to claim 1, wherein a blower outlet is provided in a ceiling portion or / and a side portion of the box body, and an airflow cleaned by a filter by a fan can be circulated and supplied to the box body. Pass box with germicidal lamp as described in Crab.   In a pass box that has doors facing the indoor side and the outdoor side that are set to a predetermined atmosphere, and that passes articles between indoors and outdoors via the box, 6 on the inner surface of the box Provided with a germicidal lamp arranged at a predetermined distance from the article on the six face side so that the article is irradiated with ultraviolet rays from the face side, and provided inside the box other than the door The current supply circuit to the germicidal lamp is configured to be able to supply current to the germicidal lamps provided on the doors only through the contacts that contact when the box and the door are in the closed state. The germicidal lamp is configured to be lit only in a closed state of the doors, and is locked so that the closed state of the doors can be maintained while the germicidal lamp is lit. Control method for pass box with germicidal lamp.

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