JP2016123431A - Steam sterilization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent condensed water of steam from falling down to an object to be sterilized on a lower stage during a sterilization step to prevent poor drying in a subsequent drying step in a steam sterilization apparatus.SOLUTION: A plurality stages of shelf materials 13 each on which an object to be sterilized is placed are vertically installed in a sterilization tank 2. A water receiving plate 14 is installed under each stage, other than the lowermost stage, of the shelf material 13. The water receiving plate 14 is installed so as to be inclined downward toward the outside in the width direction of the shelf material 13 to allow condensed water received on its top surface to flow down to both sides in the width direction. A drain receiver 23 is installed on each side wall 22 in the sterilization tank 2, corresponding to each water receiving plate 14. The drain receiver 23 receives the condensed water falling down from an outer end in the width direction of the water receiving plate 14 to prevent the condensed water from falling down to a lower stage of shelf material 13 and an object to be sterilized placed thereon.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a steam sterilization apparatus for storing an object to be sterilized in a sterilization tank and sterilizing with steam.

  Conventionally, as disclosed in Patent Document 1 below, a shelf (13) formed by a combination of wires or a perforated plate and on which an object to be sterilized is placed, and a condensed water of steam provided at the lower portion of the shelf are provided. There is known a shelf structure for steam sterilization provided with a water receiving plate (falling prevention plate 14) for preventing the lower shelf material from falling onto an object to be sterilized. In addition, the applicant has already filed a patent application for the shelf structure for steam sterilization improved from this prior art (Japanese Patent Application No. 2014-79048).

JP 2010-246847 A

  In the conventional technology, the condensed water generated in the sterilized material and the shelf material is received by the water receiving plate at the lower part of the shelf material, and drained down to both sides in the width direction of the water receiving plate, so that the condensed water is covered with the lower shelf material. Prevent falling into sterilized material. Thereby, the drying defect of the to-be-sterilized thing in the drying process after a sterilization process can be prevented.

  However, when the article to be sterilized protrudes from the shelf material, the condensed water from the upper water receiving plate falls and gets wet, so that even if the drying process is performed after the sterilization process, there is a risk of causing a drying failure.

  Therefore, the problem to be solved by the present invention is to prevent the condensed water of the steam from dropping to the lower sterilized product during the sterilization process in the steam sterilization apparatus, and to prevent the drying failure in the subsequent drying process. It is to prevent.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a steam sterilization apparatus for storing an object to be sterilized in a sterilization tank and sterilizing with steam, and the sterilization tank It is provided in a plurality of upper and lower stages, provided on the bottom of each shelf except for the shelf on which the article to be sterilized is placed and the bottom shelf, and goes downward as it goes outward in the width direction of the shelf A water receiving plate that is provided to be inclined and drains the condensed water received on the upper surface to both sides in the width direction, and is provided on a side wall in the sterilization tank corresponding to each water receiving plate, and the width direction of the water receiving plate A steam sterilization apparatus comprising: a condensate that drops off from an outer end portion; and a drain receiver that prevents a lower shelf member and a drain receiver placed thereon from being dropped.

  According to the first aspect of the present invention, during the sterilization process, the condensed water generated in the sterilized material and the shelf material is received by the water receiving plate at the bottom of the shelf material and allowed to flow down to both sides in the width direction of the water receiving plate. Can do. And the drain receiver provided on the side wall in the sterilization tank receives the condensed water that drops off from the outer end of the water receiving plate in the width direction and prevents it from falling to the lower shelf or the object to be sterilized. To do. In this way, it is possible to reliably prevent the condensed water from the upper stage from falling onto the shelf material and the object to be sterilized during the sterilization process, and to prevent poor drying in the subsequent drying process.

  In the invention according to claim 2, the drain receiver is provided on a side wall in the sterilization tank horizontally along the front-rear direction and is made of a plate material whose longitudinal section is bent into a substantially square shape, one piece of which is The side wall in the sterilization tank is provided with a gap between the side wall, while the other piece is provided to extend inward in the width direction of the sterilization tank as it goes upward from the upper end of the one piece. The extension tip of the other piece of the drain receiver extends to the inner side in the width direction than the outer edge in the width direction of the water receiving plate, and is disposed below the outer end in the width direction of the water receiving plate. The steam sterilization apparatus according to claim 1, wherein:

  If the condensate received by the drain receiver is allowed to flow down to one side in the longitudinal direction of the drain receiver, it is necessary to install the drain receiver at a certain angle or more (tilt downward in the longitudinal direction). Therefore, as the longitudinal dimension increases, the vertical displacement at both ends in the longitudinal direction of the drain receiver increases, and the vertical separation distance from the widthwise outer end of the water receiving plate increases at one end in the longitudinal direction. In some cases, one end of the drain receptacle in the longitudinal direction may come into contact with the lower shelf. However, according to the second aspect of the present invention, the drain receiver is horizontally provided on the side wall in the sterilization tank along the front-rear direction, and the condensed water from the water receiving plate is separated from the drain receiver piece and the sterilization tank. Since there is a downward flow along the side wall in the sterilization tank through the gap with the side wall of the sterilization tank, there is no inconvenience as in the case where the drain receiver is inclined and the condensed water is flowed down along the longitudinal direction. Moreover, the other piece of the drain receiver is provided so as to extend inward in the width direction of the sterilization tank as it goes upward, and its extending tip extends to the inner side in the width direction from the outer edge in the width direction of the water receiving plate. Since the water receiving plate is arranged below the outer end in the width direction of the water receiving plate, the condensed water that drops from the outer end edge in the width direction of the water receiving plate is surely passed along the side wall in the sterilization tank via the drain receiver. Can be washed away.

  According to a third aspect of the present invention, the shelf material is formed using aluminum, an aluminum alloy, or a magnesium alloy, and the shelf material is formed with irregularities on the lower surface so that the surface area of the lower surface is larger than the upper surface. 3. The steam sterilization apparatus according to claim 1 or 2, further comprising a fin or fin.

  According to invention of Claim 3, since a shelf is formed using aluminum, an aluminum alloy, or a magnesium alloy, since specific heat and thermal conductivity are large compared with stainless steel, it is easy to store heat. Therefore, heat can be stored in the shelf material in the sterilization process, and the drying time can be shortened by using heat storage in the shelf material in the subsequent drying process. Also, because the shelf has irregularities or fins on the lower surface so that the surface area of the lower surface is larger than the upper surface, more condensed water is generated on the lower surface than the upper surface of the shelf, and the condensation Since water is not dropped onto the object to be sterilized by the water receiving plate and drain receiver, the shelf material is rapidly heated while suppressing the generation of condensed water on the top surface of the shelf material, and then the object to be sterilized is heated and then dried. Can be achieved quickly.

  Furthermore, in the invention described in claim 4, the object to be sterilized is put into and out of the sterilization tank together with a carriage, and the shelves are provided in a plurality of upper and lower stages on the carriage, and the bottom shelf is removed. The steam sterilizer according to any one of claims 1 to 3, wherein the water receiving plate is provided in a lower part of each shelf.

  According to invention of Claim 4, a to-be-sterilized object can be easily taken in and out with respect to a sterilization tank via a trolley | bogie. Further, even when the article to be sterilized is put into and out of the sterilization tank together with the cart, the same effects as the inventions described in the above claims can be achieved.

  According to the steam sterilization apparatus of the present invention, it is possible to reliably prevent the condensed water of the steam from dropping into the lower article to be sterilized during the sterilization process, and to prevent poor drying in the subsequent drying process.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the steam sterilizer of one Example of this invention, and is a longitudinal cross-sectional view of the side view which shows the state which puts in / out the inner cart between a sterilization tank and an outer cart. It is a longitudinal cross-sectional view of the steam sterilization apparatus of FIG. 1 in a front view, and shows a state where an inner carriage is accommodated in a sterilization tank. It is a disassembled perspective view of a frame material and a water receiving plate among the parts which comprise the shelf of the inner trolley | bogie of FIG. It is a perspective view which shows the shelf of the inner trolley | bogie of FIG. 1, and has shown one part in cross section. It is VV sectional drawing of FIG. It is VI-VI sectional drawing of FIG. It is VII-VII sectional drawing of FIG.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 and 2 are schematic views showing a steam sterilization apparatus 1 according to an embodiment of the present invention, and FIG. 1 is a side view showing a state in which an inner carriage 4 is taken in and out between a sterilization tank 2 and an outer carriage 3. FIG. 2 is a longitudinal sectional view in front view showing a state in which the inner cart 4 is accommodated in the sterilization tank 2, and the door of the sterilization tank 2 is omitted. Moreover, in FIG. 2, the vapor | steam jacket mentioned later is also abbreviate | omitted and shown.

  As shown in FIG. 1, the steam sterilization apparatus 1 of the present embodiment includes an inner carriage 4 having a plurality of upper and lower shelves 5 on which an object to be sterilized (not shown) is placed, and an outer carriage on which the inner carriage 4 is placed and transported. A trolley 3 and a sterilization tank 2 into which the inner trolley 4 is inserted and removed between the outer trolley 3 are provided. The article to be sterilized is typically a medical instrument, and may be accommodated in a sterilization bag, a nonwoven fabric, a sterilization container, or the like as desired.

  The inner carriage 4 is carried on the outer carriage 3 and is moved between the outer carriage 3 and the sterilization tank 2 and put in and out. For this purpose, a guide rail 6 is provided at the bottom of the sterilization tank 2, and the wheels 7 of the inner carriage 4 travel on the guide rail 6. The outer carriage 3 is also provided with a guide rail 9 on a pedestal 8, and the wheels 7 of the inner carriage 4 travel on the guide rail 9. The outer carriage 3 is allowed to travel by a caster 10 provided at the bottom of the base 8. The outer carriage 3 is provided with a handle 11, and the outer carriage 3 can be driven with the handle 11.

  The sterilization tank 2 is provided in the sterilization apparatus main body 12, and the sterilization apparatus main body 12 supplies steam into the sterilization tank 2 to sterilize an object to be sterilized in the sterilization tank 2. The sterilizer main body 12 of the present embodiment has a sterilization tank 2 that opens to the front (right side in FIG. 1) and that can be opened and closed by a door, and sterilizes by sucking and discharging the gas in the sterilization tank 2 to the outside. Depressurization means (not shown) for depressurizing the inside of the tank 2, return pressure means (not shown) for introducing outside air into the depressurized sterilization tank 2 and restoring the pressure inside the sterilization tank 2, and steam into the sterilization tank 2 Steam supply means (not shown) to be supplied, drain discharge means (not shown) for discharging condensed water from the sterilization tank 2 through a steam trap, and gas in the sterilization tank 2 from the atmospheric pressure due to the differential pressure Exhaust means (not shown) for discharging to the surface, a pressure sensor (not shown) for detecting the pressure in the sterilization tank 2, a temperature sensor (not shown) for detecting the temperature in the sterilization tank 2, and detection signals of these sensors Control means (not shown) for controlling each means based on the elapsed time Provided with a door.

  The sterilizer main body 12 accommodates an object to be sterilized in the sterilization tank 2, and the door is hermetically closed. When the start of operation is instructed, the air from the sterilization tank 2 is exhausted, and then steam (usually saturated steam) is supplied into the sterilization tank 2 to sterilize the object to be sterilized. The inside of the tank 2 is depressurized to dry the object to be sterilized. A specific example will be described. First, the air is evacuated from the sterilization tank 2 by repeatedly reducing the pressure in the sterilization tank 2 by the decompression means and steaming the sterilization tank 2 by the steam supply means. Thereafter, the inside of the sterilization tank 2 is pressurized with steam by means of steam supply, and the sterilization tank 2 is raised to the sterilization temperature (typically 135 ° C.), and then the sterilization process is started. In the sterilization process, the temperature in the sterilization tank 2 is monitored by a temperature sensor, and the steaming into the sterilization tank 2 by the steaming means is controlled so that the sterilization temperature is maintained for the sterilization time. Thereafter, the steam supply by the steam supply means is stopped, the steam is exhausted from the sterilization tank 2 by the exhaust means, and then the pressure in the sterilization tank 2 is reduced to a predetermined pressure by the pressure reduction means, and the set time is maintained. Try to dry things. After drying the article to be sterilized, the decompression means is stopped, while the inside of the sterilization tank 2 is decompressed to atmospheric pressure by the decompression means, and the series of operations is completed.

  As described above, the sterilization apparatus main body 12 sequentially executes the air exclusion process, the sterilization process, the exhaust process, and the drying process. Moreover, the sterilizer main body 12 includes heating surfaces on the left and right sides of the sterilization tank 2 in order to heat the inside of the sterilization tank 2 from the outside and maintain the desired temperature. Typically, the right and left side walls of the sterilization tank 2 are provided with steam jackets (not shown) that supply steam in a hollow structure. As a preheating step before the air exclusion step, steam is supplied to the steam jacket to preheat the sterilization tank 2. And the heating maintenance in the sterilization tank 2 by such a steam jacket is continued from the subsequent air exclusion process to a drying process. Therefore, in the sterilization process and the drying process, the article to be sterilized is heated from the steam jacket.

  As described above, the inner cart 4 that is taken in and out of the sterilization tank 2 includes a plurality of shelves 5 in the vertical direction. As shown in FIG. 2, each shelf 5 is provided with a shelf 13 on which an article to be sterilized is placed and a lower portion of the shelf 13, and condensed water falls on the lower shelf 13 and the article to be sterilized. The water receiving plate 14 is provided. Each water receiving plate 14 is preferably provided so as to be superimposed immediately below each shelf member 13. In addition, it is not necessary to install the water receiving plate 14 in the lower part of the bottom shelf 13. In the illustrated example, the inner cart 4 is provided with three stages of shelves 5 above and below, but it goes without saying that the number of stages of the shelves 5 can be changed as appropriate.

  The inner bogie 4 is provided with support columns 15 along the vertical direction at the four corners of the front, rear, left, and right, and a plurality of shelves 5 are held on these support columns 15 at intervals in the vertical direction. At this time, in the present embodiment, a substantially rectangular frame member 16 as shown in FIG. 3 is held by the pillars 15 at the four corners, and the shelf member 13 and the water receiving plate 14 are held by the frame member 16. However, as described above, only the shelf material 13 is provided in the lowermost stage, and the installation of the water receiving plate 14 is unnecessary. Accordingly, the lowermost frame member 16 does not need a holding structure for the water receiving plate 14. As will be described later, the frame member 16 is provided with pipes 17 at four corners. The pipes 17 are held by the support columns 15 by being fitted to the support columns 15 via appropriate spacers (reference numerals omitted). .

  3 to 7 are schematic views showing the structure of the shelf 5 other than the lowermost stage. FIG. 3 is an exploded perspective view of the frame member 16 and the water receiving plate 14, and FIG. It is a perspective view which shows the state which attached the board 14 and the shelf material 13, and has shown it by making a part into a cross section. 5 is a cross-sectional view taken along line VV in FIG. 4, FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 4, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. The carriage 4 is shown in a state of being accommodated in the sterilization tank 2. In the following, the shelf structure other than the lowermost stage will be described, but the lowermost shelf 5 is the same as the uppermost shelf structure except that the water receiving plate 14 and its mounting structure are not provided.

  As shown in FIG. 3, the frame member 16 has short pipes 17 arranged at the four corners of the front, rear, left and right, and the left and right pipes 17 are connected to each other by a plate-like horizontal member 18 in the front and rear, respectively. The front and rear pipes 17 are connected by a substantially L-shaped material 19. Thus, the front and rear horizontal members 18 and the left and right substantially L-shaped members 19 are formed into a substantially rectangular frame shape. The left and right substantially L-shaped members 19 are arranged horizontally with one piece 19a facing inward in the left-right direction of the frame member 16, while being arranged vertically with the other piece 19b facing upward.

  A central holding member 20 is provided at the center in the width direction of the frame member 16 so as to bridge the front and rear horizontal members 18. Further, side holding members 21 are provided at the lower portions of the substantially L-shaped material 19 so as to bridge the front and rear pipes 17 at both left and right ends of the frame member 16. As the center holding member 20 and the left and right side holding members 21, a substantially rectangular plate material elongated in the front-rear direction is used. In addition, an upwardly extending piece 21 a is connected to both front and rear end portions of the side holding material 21, and the front and rear end portions of the side holding material 21 are fixed to the pipe 17 at the location of the extending piece 21 a. Is done.

  The substantially L-shaped member 19, the center holding member 20 and the side holding member 21 are arranged in parallel to each other. Further, in a state in which the frame member 16 is attached to the support column 15, the one piece 19 a of the left and right substantially L-shaped members 19 is horizontally disposed at a corresponding height. Furthermore, in that state, the upper end side of the central holding member 20 and the left and right side holding members 21 is horizontally arranged, and the upper end side of the side holding member 21 is set to be larger than the upper end side of the central holding member 20. Only placed below.

  On the frame member 16, the water receiving plate 14 is inclined and held so as to span the center holding member 20 and the side holding member 21. In this embodiment, a pair of left and right water receiving plates 14 are combined and provided in a mountain shape when viewed from the front. Each water receiving plate 14 is formed of a substantially rectangular metal plate (for example, an aluminum plate), and both end portions in the width direction are folded back to the back side. Each water receiving plate 14 is formed with ribs 14a along the width direction at equal intervals in the longitudinal direction as desired. As shown in FIGS. 6 and 7, the rib 14 a is provided by bending upwardly protruding portions on a metal plate. Further, as shown in FIG. 3, the left water receiving plate 14 (14L) of the pair of left and right water receiving plates 14 (14L, 14R) is formed with notches 14b at both front and rear ends of the left side. The right water receiving plate 14 (14R) has notches 14b formed at both front and rear ends of the right side.

  As shown in FIG. 6, the left side water receiving plate 14 (14 </ b> L) is held with the left side part placed on the left side part holding member 21 and the right side part placed on the center holding member 20. On the other hand, the right side water receiving plate 14 (14 </ b> R) is held with the right side portion placed on the right side holding member 21 and the left side portion placed on the central holding member 20. At this time, the left and right water receiving plates 14 are overlapped at the end on the central holding member 20. Further, the left and right water receiving plates 14 are positioned by engaging the front and rear notches 14b with the upwardly extending pieces 21a provided on the front and rear sides of the side portion holding member 21, respectively (FIG. 5).

  As shown in FIG. 5, the pair of left and right water receiving plates 14 are arranged in a gentle mountain shape as a whole as shown in FIG. 5. That is, each water receiving plate 14 is disposed so as to be inclined downward from the center in the width direction of the frame member 16 toward the outside in the width direction. As shown in FIG. 6, in the installed state on the frame member 16, the water receiving plate 14 extends more outward in the width direction than the shelf member 13 and the frame member 16. Moreover, in that state, the water receiving plate 14 is the same as the longitudinal ends of the substantially L-shaped material 19 or slightly extends forward and backward.

  A shelf member 13 is provided on the frame member 16 so as to bridge the left and right substantially L-shaped members 19. In the present embodiment, as shown in FIG. 4, the plurality of shelf members 13 are arranged at equal intervals in the front-rear direction with a gap. Each shelf member 13 includes a substantially rectangular plate-like portion 13a extending in the left-right direction and a plurality of fins 13b extending downward from the lower surface of the plate-like portion 13a. In the illustrated example, a plurality of fins 13b are provided apart from each other in the front-rear direction, and each fin 13b extends downward from the plate-like portion 13a by a predetermined dimension and extends in the left-right direction.

  Moreover, as shown in FIG. 7, it is preferable that the front and rear end portions of the plate-like portion 13a are formed on an inclined surface 13c that is inclined downward as it goes outward in the front-rear direction. And the shelf material 13 of such a structure is provided so that it may span between the one piece 19a of the substantially L-shaped material 19 on either side, as shown in FIG. At this time, the shelf member 13 is positioned in the left-right direction by being sandwiched between the other pieces 19 b of the substantially L-shaped member 19. In addition, as described above, it is preferable that a gap S having a thickness about the plate thickness of the plate-like portion 13a is provided between the plate-like portions 13a of the shelf members 13 adjacent to each other in the front-rear direction. By leaving a gap S between the shelves 13, the condensed water generated on the shelves 13 can be dropped downward from the gaps S during the sterilization process. In the present embodiment, the shelf member 13 is held horizontally by the frame member 16, but may be held slightly inclined depending on the case.

  The shelf member 13 is preferably formed of a material that is superior in heat storage compared to stainless steel. Specifically, it is preferably formed using aluminum, an aluminum alloy, or a magnesium alloy. For example, in the case of aluminum, the specific heat can be increased about twice and the thermal conductivity can be increased about 10 times compared with stainless steel. Since specific heat is large, heat storage is excellent. Therefore, heat can be stored in the shelf material 13 in the sterilization process, and the heat to be sterilized can be heated with the heat of the shelf material 13 in the drying process by releasing the heat storage in the subsequent drying process, so that the drying time can be shortened. it can. In addition, since the thermal conductivity is large, the heat flux that imparts the heat storage of the shelf 13 to the sterilized material during the drying process increases, and from this point, the drying time can be shortened. The shelf material 13 may be subjected to an appropriate anticorrosion treatment, such as anodizing aluminum.

  The shelf 13 may be a simple flat plate, but it is preferable to provide the fins 13b on the lower surface as described above so that the surface area of the lower surface is larger than the upper surface. However, instead of the fins 13b or in addition to the fins 13b, irregularities may be formed on the lower surface. In any case, the shelf 13 preferably has a larger surface area on the lower surface than the upper surface, so that more condensed water can be generated on the lower surface than the upper surface in the sterilization process. In other words, the shelf material 13 receives a lot of heating from the lower surface. Moreover, the condensed water is not dropped on the lower shelf member 13 or its sterilized object by the water receiving plate 14 provided at the lower part of the shelf member 13. Thereby, while suppressing the generation | occurrence | production of the condensed water in the upper surface of the shelf material 13, the shelf material 13 can be heated rapidly, and the to-be-sterilized thing and subsequent drying can be aimed at rapidly.

  As shown in FIG. 1, FIG. 2, FIG. 6, etc., drain receivers 23 are provided on the left and right side walls 22 in the sterilization tank 2 corresponding to each water receiving plate 14 of the inner carriage 4. The drain receiver 23 receives the condensed water that drops off from the outer end in the width direction of the water receiving plate 14 and prevents it from dropping onto the lower shelf 13 and the article to be sterilized.

  In the present embodiment, the drain receiver 23 is made of a plate material that is horizontally provided on the side wall 22 in the sterilization tank 2 along the front-rear direction and whose longitudinal section is bent into a substantially square shape. The drain receiver 23 is provided with a piece 23 a on the side wall 22 in the sterilization tank 2 with a gap between the side wall 22 and the drain receiver 23. Specifically, as shown in FIGS. 1 and 6, one piece 23 a of the drain receiver 23 is attached to the side wall in the sterilization tank with bolts and nuts 24 at a plurality of locations in the longitudinal direction. At that time, by arranging a nut 25 or the like as a spacer between the one piece 23a and the side wall 22, the one piece 23a of the drain receiver 23 is spaced from the side wall 22 (FIG. 5). 22 (or inclined to the outside in the width direction of the sterilization tank 2 as it goes downward if desired).

  The other piece 23b of the drain receiver 23 is provided so as to extend inward in the width direction of the sterilization tank 2 as it goes upward from the upper end of the one piece 23a. And the extension front-end | tip part of the other piece 23b of the drain receptacle 23 is extended to the width direction inner side rather than the width direction outer end edge (folding part) of the water receiving plate 14, and the width direction outer end part of the water receiving plate 14 It is arranged close to the lower part of the. The article to be sterilized is disposed below the roof-like portion formed by the left and right water receiving plates 14 and the other piece 23b of the drain receiver 23.

  In the state where the inner cart 4 is accommodated in the sterilization tank 2 and stopped at a predetermined position, the drain receiver 23 corresponds to the longitudinal dimension of the water receiving plate 14 of the inner cart 4 or extends forward and backward. Arranged. Since it is such a structure, the condensed water which flows down the upper surface of the water receiving plate 14 to the width direction outer side will be induced | guided | derived to the clearance gap between the drain receptacle 23 and the side wall 22 of the sterilization tank 2, if it falls from the width direction outer end edge, It will fall down along the side wall 22 of the sterilization tank 2. Thereby, even if the article to be sterilized placed on the lower shelf 5 protrudes from the shelf 5, it is prevented that the condensed water that has fallen off from the water receiving plate 14 hits, which becomes an obstacle to drying in the drying process. Is prevented.

  The steam sterilization apparatus 1 of the present invention is not limited to the configuration of the above embodiment, and can be changed as appropriate. In particular, the shelf 13 provided in the upper and lower stages in the sterilization tank 2, the water receiving plate 14 provided at the lower part of the shelf 13 in each step except the lowest step, and sterilization corresponding to each water receiving plate 14. A drain receiver 23 provided on the side wall 22 in the tank 2, and the water receiving plate 14 is provided so as to incline downward as it goes outward in the width direction of the shelf 13, so that the condensed water received on the upper surface is widthwise. If the drain receiver 23 receives the condensed water that drops off from the outer end in the width direction of the water receiving plate 14 to prevent it from dropping onto the lower shelf 13 and the article to be sterilized, Other structures can be changed as appropriate.

  For example, in the above-described embodiment, the object to be sterilized is placed on the inner cart 4 and the inner cart 4 is put in and out between the sterilization tank 2 and the outer cart 3, but the outer cart 3 is omitted and the inner cart 4 is used alone. As a sterilization cart, the sterilization tank 2 may be directly put in and out by a caster. Alternatively, the sterilization tank 2 itself may be provided with a shelf 5 (a shelf member 13 and a water receiving plate 14), and an object to be sterilized may be directly taken into and out of the shelf 5. In that case, it replaces with the said support | pillar 15, and the shelf 13 and the water receiving plate 14 can also be attached using the inner wall in the sterilization tank 2, or a member fixed to it.

  Moreover, in the said Example, although the shelf 13 of each step | level was comprised with the some member, you may be comprised with a single member. Moreover, each shelf member 13 may be configured in a simple flat plate shape as described above, or may be configured in a porous plate shape or a net shelf shape.

  Moreover, in the said Example, although the water receiving plate 14 of each step | stage was comprised with the some member, you may comprise with a single member. Specifically, a member obtained by bending a metal plate into a mountain shape when viewed from the front may be used as the water receiving plate 14.

  Moreover, in the said Example, although the shelf material 13 and the water receiving plate 14 were made detachable with respect to the frame material 16, depending on the case, one or both of the shelf material 13 and the water receiving plate 14 are welded etc. May be fixed to the frame member 16 or the support column 15.

  Moreover, in the said Example, the drain receptacle 23 provided in the side wall 22 in the sterilization tank 2 can be attached or detached to the side wall 22 in the sterilization tank 2, or the attachment position with respect to the side wall 22 in the sterilization tank 2 can be changed. May be. For example, in FIG. 6, a hole through which a bolt is passed is formed in one piece 23 a of the drain receiver 23, and a plurality of holes are formed by making this hole a long and narrow elongated hole (or vertically spaced apart). It is also possible to adjust the mounting position of the drain receiver 23 up and down depending on which one of the bolts is passed through. Alternatively, a large number of bolts or bolt holes for fixing the drain receiver 23 are provided on the side wall 22 in the sterilization tank 2 in the vertical direction, and the installation height of the drain receiver 23 is changed depending on which one is used. It may be possible. If the number and installation height of the drain receivers 23 can be changed, it is possible to easily cope with changes in the number and height of the shelves 5 of the inner carriage 4.

  In the embodiment, the substantially L-shaped material 19 is disposed on the left and right sides of the frame member 16 and the shelf member 13 is bridged on the left and right. However, the substantially L-shaped member 19 is disposed on the front and rear sides of the frame member 16. Thus, the shelf member 13 may be bridged back and forth. Alternatively, the shelf member 13 may be supported by the frame member 16 in front, rear, left, and right.

  Furthermore, in the said Example, the drain receptacle 23 was horizontally provided in the side wall 22 in the sterilization tank 2 along the front-back direction, and it was set as the structure which pours condensed water into the clearance gap between the side wall 22 in the sterilization tank 2. However, in some cases, the drain receiver 23 itself is provided so as to be inclined downward as it goes in one (or both) in the longitudinal direction, and a groove formed in the drain receiver 23 itself, or the drain receiver 23 and the side wall 22 in the sterilization tank 2. It is good also as a structure which drops condensed water in the groove | channel formed by and flows down the condensed water from the water-receiving plate 14 to a longitudinal direction one side.

  However, in the case where the condensed water received by the drain receiver 23 is allowed to flow down to one side in the longitudinal direction of the drain receiver 23, the drain receiver 23 is inclined at an angle of a certain degree (inclined downward as it goes to the one longitudinal direction). Therefore, when the longitudinal dimension is increased, the vertical shift at both ends in the longitudinal direction of the drain receiver 23 is increased, and the vertical separation from the outer end in the width direction of the water receiving plate 14 at one end in the longitudinal direction. The distance increases, and in some cases, one end in the longitudinal direction of the drain receiver 23 may come into contact with the lower shelf 5. Therefore, as in the above-described embodiment, it is preferable to arrange the drain receiver 23 horizontally so that the condensed water flows into the gap with the side wall 22 in the sterilization tank 2.

  In addition, in the said Example, although the door was provided only in the front of the sterilization tank 2, you may provide a door in both the front and back of the sterilization tank 2 by the case. In that case, one door is a carry-in door for putting a material to be sterilized before sterilization into the sterilization tank 2, and the other door is a carry-out door for taking out the sterilized material after sterilization out of the sterilization tank 2. It is said.

DESCRIPTION OF SYMBOLS 1 Steam sterilizer 2 Sterilization tank 3 Outer trolley 4 Inner trolley 5 Shelf 6 (Sterilization tub) guide rail 7 Wheel 8 Pedestal 9 (Outer trolley) Guide rail 10 Caster 11 Handle 12 Sterilizer main body 13 Shelf (13a: Plate Shaped part, 13b: fin, 13c: inclined surface)
14 Water receiving plate (14a: rib, 14b: notch)
15 support 16 frame material 17 pipe 18 horizontal member 19 substantially L shape (19a: one piece, 19b: other piece)
20 central holding material 21 side holding material (21a: extension piece)
22 Side wall 23 Drain receptacle (23a: one piece, 23b: other piece)
24 bolt nut 25 nut

Claims (4)

A steam sterilizer for storing an object to be sterilized in a sterilization tank and sterilizing with steam,
Shelf material provided in a plurality of upper and lower stages in the sterilization tank, on which an article to be sterilized is placed,
It is provided at the lower part of each shelf except for the lowest shelf, and is provided so as to incline downward as it goes outward in the width direction of the shelf, and it allows the condensed water received on the upper surface to flow down to both sides in the width direction. A water receiving plate,
Corresponding to each of the water receiving plates is provided on the side wall in the sterilization tank, receives condensed water that drops off from the outer end in the width direction of the water receiving plate, to the lower shelf and the article to be sterilized A steam sterilizer comprising: a drain receiver for preventing the fall of the water. The drain receiver is provided on a side wall in the sterilization tank horizontally along the front-rear direction, and is made of a plate material whose longitudinal section is bent in a substantially square shape. One piece of the drain receiver is placed on the side wall in the sterilization tank. While being provided with a gap between the side wall, the other piece is provided to extend inward in the width direction of the sterilization tank as it goes upward from the upper end of the one piece,
The extension tip of the other piece of the drain receiver extends to the inner side in the width direction than the outer edge in the width direction of the water receiving plate, and is disposed below the outer end in the width direction of the water receiving plate. The steam sterilizer according to claim 1. The shelf material is formed using aluminum or an aluminum alloy, or a magnesium alloy,
The steam sterilizer according to claim 1 or 2, wherein the shelf member is provided with irregularities or fins on the lower surface so that the surface area of the lower surface is larger than the upper surface. The object to be sterilized is put in and out of the sterilization tank together with the carriage,
The said dolly is provided with the said water-receiving plate in the lower part of the shelf material of each step | line | column except the shelf material of the lowest step while being provided with the said shelf material in the upper and lower two steps | paragraphs. 4. The steam sterilizer according to any one of 3 above.

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