JP2007106449A - Sterilization tray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sterilization tray made of a synthetic resin which has excellent heat resistance, warm strength, and chemical resistance and is prevented from deforming and falling even when trays are arranged in many stacks or subject to high-temperature steam. <P>SOLUTION: The sterilization tray is formed by integrally injection-molding a polyphenylsulfone resin, polyetherimide resin, or polyethersulfone resin. The tray includes an approximately square bottom wall 10 having a large number of vents 16, and side walls surrounding the bottom wall and having a large number of vents 21. Flanges 30a to 30d are formed along the upper edges of the corresponding side walls. Also, vertical leg-like ribs 25 are formed on the external faces of the side walls. The trays are stacked by vertically positioning the ribs on the flanges. The flanges are formed on the upper edges of the side walls so that the upper faces decline inward. A plurality of horizontal supports 31 are formed in the form of spots at appropriate intervals on the upper faces of the corresponding flanges. The vertical leg-like ribs 25 are formed on the external faces of the side walls immediately below the corresponding supports. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sterilization tray made of synthetic resin that can contain these sterilized materials when sterilizing medical supplies, medicines, foods and the like with high-temperature steam.

  When sterilizing medical supplies such as syringes and surgical instruments with high-temperature steam, the tray for storing the sterilized material is conventionally made of metal (mainly made of stainless steel) because it requires heat resistance and chemical resistance. However, since metal trays require a handmade process, there is a problem that the manufacturing cost is high, and the metal tray is heavy, so it is not easy to handle in use. There was a risk of rusting when attached.

Further, Patent Document 1 below shows a synthetic resin container in which a concave portion for positioning is formed on a flange formed on the upper opening edge of the container so that stable stacking in multiple stages is possible. Discloses a cleaning container that improves water drainage after cleaning by forming a flange that is inclined downward and outward at the upper opening edge of the container.
Utility Model Registration No. 2573268 Utility Model Registration No. 2593481

However, conventional synthetic resin containers generally have poor heat resistance, and therefore, when they are stacked in a sterilization chamber and exposed to high-temperature steam, they may collapse due to deformation. For this reason, the conventional synthetic resin container cannot be used in such a manner that it is stacked in multiple stages for sterilization.
In addition, conventional containers may not be able to spread high-temperature steam well because of insufficient ventilation, but increasing the opening rate by providing a large number of vents will impair the strength of the container. There has been a problem that collapse due to thermal deformation is more likely to occur.

Further, in a container in which a flange as shown in Patent Document 2 is inclined downwardly outward, a lateral component force is generated by applying a load of an upper container on the inclined surface, so that strength is increased. There is a problem that it becomes weak and easily buckles and deforms, and as a characteristic of injection molding, the inclination angle of the flange cannot be formed with the expected accuracy, so even if the inclination angle is slightly different from left to right due to molding errors, it is multistage. As a result of being stacked, there was a risk that the uppermost container would be greatly tilted and collapsed. Even if the flange is formed to be inclined in this way, capillary action acts on the contact portion with the upper container on the upper surface of the flange, so that the draining action due to the inclination is practically hardly performed on this contact portion. Is clear.
Furthermore, the conventional containers generally have a problem that they cannot support the stacking operation by the robot because of the large backlash between the lower and upper containers during stacking.

The present invention is intended to solve the above problems, and the sterilization tray according to claim 1 is made of any one of a polyphenylsulfone resin, a polyetherimide resin and a polyethersulfone resin. This is a sterilization tray that is integrally molded by injection molding, and has a substantially rectangular bottom wall in which a large number of vent holes are formed, and a large number of vent holes that are formed so as to surround the bottom wall. And forming a flange on the upper edge of the side wall, forming a vertical leg-shaped rib on the outer surface of the side wall, and stacking the vertical leg-shaped rib on the flange in multiple stages It was made to be able to do it.
In the sterilization tray according to the second aspect of the present invention, in the sterilization tray, a flange whose upper surface is inclined inwardly downward is formed at the upper edge of the side wall, and a plurality of horizontal planar supports are formed on the upper surface of the flange. The part is formed in a spot shape at an appropriate interval, and a vertical leg rib is formed on the outer surface of the side wall directly below each support part, and the lower surface of the lower edge of the vertical leg rib is formed horizontally and stacked on the upper stage. The lower edge lower surface of the vertical leg-like rib of the tray is placed on the support portion.

According to a third aspect of the present invention, in the sterilization tray, a positioning protrusion is formed on an upper surface of the flange, and the positioning protrusion is stacked between the pair of vertical leg-shaped ribs stacked on the upper stage. It is characterized in that it is loosely fitted into the.
According to a fourth aspect of the present invention, in the sterilization tray, the bottom wall has a plurality of vent holes formed in a grid shape by arranging upright plate-like members in a lattice shape, and the substantially lower half of the side wall is A vent hole communicating with the vent hole is formed by notching an arch shape except for a connecting portion with the upright plate member.
In the sterilization tray described above, the upper edge of the upright plate-like member constituting the bottom wall is notched in a wave shape, and the cylindrical sterilized product is inclined on the upright plate-like member. It is characterized in that it can be placed stably at

The tray for sterilization described in claim 1 has excellent heat resistance, hot strength, and chemical resistance, and there is no risk of collapsing due to deformation even when stacked in multiple stages and exposed to high temperature steam in a sterilization chamber.
In the sterilization tray according to the second aspect, since the load of the upper tray is received by the horizontal support portion, it can withstand a large load and is not easily collapsed even when stacked in multiple stages. In addition, since most of the water droplets fall due to the inclination of the flange, this does not deteriorate the drainage.

In the sterilization tray according to the third aspect, the tray can be placed on the upper stage without lateral displacement, so that it can be stacked in multiple stages without fear of collapsing, and it can be mechanically stacked by a robot. It becomes.
In the sterilization tray according to the fourth aspect, the air permeability is ensured without impairing the strength, and the high-temperature steam can be well distributed throughout.
In the sterilization tray according to the fifth aspect, the sterilized product can be stably placed with good drainage.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a sterilization tray according to the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, FIG. 4 is a side view, FIG. 5 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a cross-sectional view taken along the line BB of FIG. 2, and FIG. 7 is a cross-sectional view taken along the line CC of FIG. This sterilization tray is made of polyphenylsulfone resin (amorphous engineering plastic manufactured and sold by Solvay Advanced Polymers (SAPLLC, USA)), which is relatively lightweight, tough and hard. A tray with excellent heat resistance, hot strength, and chemical resistance is formed.

  The sterilization tray is composed of a substantially rectangular bottom wall 10 and side walls 20a to 20d formed so as to surround the bottom wall, and flanges 30a to 30d are formed on the upper edge of the side wall. 30d is integrally formed. The bottom wall 10 is arranged so that the upright plate-like members 12a to 15a, 12b to 15b, 12c to 15c, and 12d to 14d are orthogonal to the lattice shape with respect to the upright plate-like members 11 arranged at appropriate intervals. As a result, a large number of ventilation holes 16 are formed in a grid shape. And the upper edge of each upright plate-shaped member 12a-12d, 13a-13d, 14a-14d is notched in the waveform. In addition, the height of the upper edge of each of the upright plate-like members having a wave shape decreases in order from the reference numerals 12a to 12d toward the reference numerals 14a to 14d. For this reason, as shown in FIG. 5, a substantially cylindrical sterilized material 40 such as a syringe (syringe) or the like is stably placed on the upright plate-like member, and the water droplets are placed by being placed in an inclined state. Is led downward so that the drainage is good. Further, as shown in FIGS. 3 and 4, the substantially lower half of each of the side walls 20a to 20d is cut into an arch shape except for a connecting portion with each of the upright plate members, thereby forming a peripheral portion of the bottom wall 10. A vent 21 communicating with the located vent 16 is formed. Reference numeral 22 denotes a reinforcing horizontal rib projecting on the inner surfaces of the side walls 20a to 20d, and 23 and 24 are draining vertical ribs projecting on the inner surfaces of the side walls 20a and 20b to stop the sterilized material 40.

  The flanges 30a to 30d are formed so that the upper surface is inclined downward inward, and a horizontal support portion 31 is provided on the upper surface of the flange as shown in FIGS. Six spots are formed on each side at appropriate intervals. And the vertical leg-shaped rib 25 is formed in the outer surface of side wall 20a-20d just under each said support part 31, and the lower edge part lower surface 25a of this vertical leg-shaped rib is formed horizontally similarly to the lower edge of this side wall. . For this reason, when the trays are stacked in multiple stages as shown in FIG. 10, the lower edge lower surface 25a of the vertical leg-like ribs 25 of the trays stacked on the upper stage is placed on the support part 31 of the lower tray. To do. The outer peripheral edges of the flanges 30a to 30d are bent downward to form hanging edges 32a to 32d.

  33a to 33d are positioning protrusions formed on the upper surfaces of the flanges 30a to 30d, respectively. When the trays are stacked as described above, the positioning protrusions are a pair of trays stacked in the upper stage. The vertical leg-like ribs 25 are loosely fitted. Reference numerals 26a to 26d denote notches formed on the side walls 20a to 20d in order to avoid collision with the positioning protrusions 33a to 33d. The positioning protrusions 33a to 33d and the pair of vertical leg-like ribs 25 on which the positioning protrusions are loosely fitted are formed at positions slightly shifted from the center of each side of the flange to one side, The trays are stacked only when the trays are in the same direction. That is, the upper tray is not stacked in a state where the upper tray is rotated 180 degrees in the horizontal plane with respect to the lower tray.

  This sterilization tray is made of the above-mentioned resin, such as upright plate-like members 11, 12a to 15a, 12b to 15b, 12c to 15c, 12d to 14d, side walls 20a to 20d, flanges 30a to 30d, vertical leg-shaped ribs 25, etc. By forming the main part into a substantially uniform thickness of about 3 mm, deformation, dimensional error, etc. associated with thermal shrinkage during molding of the polyphenylsulfone resin can be minimized. .

  The sterilization tray configured as described above forms the positioning protrusions 33a to 33d, and the tray stacked on the upper stage is guided by the positioning protrusion, so that the tray is always true without being laterally displaced. The vertical leg-like ribs 25 of the upper tray can be reliably mounted on the support portion 31 of the lower tray. For this reason, it is easy to cause the robot to mechanically stack.

  Further, since the load of the upper tray is received by the horizontal support portion 31, it is difficult to buckle and deform without causing a lateral component force on the vertical leg-shaped ribs, so that it can withstand a large load, and multistage Even if they are stacked on top of each other, they are difficult to collapse. In addition, the support portion 31 is formed in a spot shape with an appropriate interval on the flange formed in a downwardly inclined manner inward, and most of the water droplets fall due to the inclination of the flange. Draining does not worsen.

In addition, this sterilization tray is integrally molded with polyphenylsulfone resin, so it has excellent heat resistance, hot strength, and chemical resistance. It collapses due to deformation even if it is stacked in multiple stages in a sterilization chamber and exposed to high-temperature steam. There is no fear of doing so.
Note that a sterilization tray having excellent heat resistance, hot strength, and chemical resistance can be formed by molding with a polyetherimide resin or a polyethersulfone resin instead of the polyphenylsulfone resin.

Further, since the bottom wall 10 is formed by arranging upright plate-like members in a lattice shape, the bottom wall 10 has a strength capable of withstanding the weight of the sterilized material, and the upper edge of the upright plate-like member is notched in a wave shape. As a result, the sterilized product can be placed stably with good drainage.
Here, the concept that the bottom wall 10 has a lattice shape includes those in which a rhombic mesh is formed as an oblique lattice shape, and the wave shape of the upper edge of the upright plate-like member is, for example, V Needless to say, it includes a shape similar to a wave shape, such as a zigzag shape with a series of letter shapes.

  Further, by arranging the upright plate-like members in a lattice shape, a large number of vent holes 16 are formed in a grid shape, and the vents located at the peripheral portion of the bottom wall 10 in the substantially lower half of the side walls 20a to 20d. Since the air vent 21 communicating with the mouth 16 is formed, the air permeability is sufficiently ensured without impairing the strength of the tray, and there is no risk of collapsing due to thermal deformation even when stacked in multiple stages. The whole can be well distributed and the sterilization process can be perfected.

The perspective view of the tray for sterilization which shows embodiment of this invention. The top view of the tray for sterilization which shows embodiment of this invention. The front view of the tray for sterilization which shows embodiment of this invention. The side view of the tray for sterilization which shows embodiment of this invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. The CC sectional view taken on the line of FIG. The elements on larger scale of FIG. The elements on larger scale of FIG. Sectional drawing which showed the stacked state of the tray for sterilization which is embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bottom wall 11 Standing plate-like member 12a-15a, 12b-15b, 12c-15c, 12d-14d Standing plate-like member 16 Vent 20a-20d Side wall 21 Vent 25 25 Vertical leg-shaped rib 25a Lower edge of vertical leg-shaped rib Lower part 30a-30d Flange 31 Support part 33a-33d Positioning protrusion 40 Sterilized material

Claims (5)

  A sterilization tray integrally molded by injection molding one of a polyphenylsulfone resin, a polyetherimide resin, and a polyethersulfone resin, and having a large number of vents The bottom wall has a shape and a side wall formed so as to surround the bottom wall and provided with a large number of vents. A flange is formed on the upper edge of the side wall, and a vertical leg shape is formed on the outer surface of the side wall. A sterilization tray characterized by forming ribs and stacking the vertical leg-shaped ribs on the flanges in multiple stages.   At the upper edge of the side wall, a flange whose upper surface is inclined downward inward is formed, and a plurality of horizontal support portions are formed on the upper surface of the flange in a spot shape at appropriate intervals. A vertical leg-like rib is formed on the outer surface of the side wall directly below the section, a lower surface of the lower edge of the vertical leg-shaped rib is formed horizontally, and a lower surface of the lower edge of the vertical leg-shaped rib of the tray stacked on the upper stage is supported The sterilization tray according to claim 1, wherein the tray is placed on a part.   2. A positioning protrusion is formed on the upper surface of the flange, and the positioning protrusion is loosely fitted between a pair of vertical leg-shaped ribs of a tray stacked in an upper stage. 2. The sterilization tray according to 2.   By arranging upright plate-like members in a lattice pattern on the bottom wall, a large number of vents are formed in a grid shape, and the substantially lower half of the side wall is cut into an arch shape except for the connecting portion with the upright plate-like member. The sterilization tray according to any one of claims 1 to 3, wherein a vent hole communicating with the vent hole is formed by lacking the vent hole.   The upper edge of the upright plate member constituting the bottom wall is notched in a wave shape so that a cylindrical sterilized material can be stably placed on the upright plate member in an inclined state. Sterilization tray as described.

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