EP3762045A1

EP3762045A1 - Sterilization sieve tray with corrugations or indented/bulged sheet metal base

Info

Publication number: EP3762045A1
Application number: EP19709423.8A
Authority: EP
Inventors: Timo Knittel; Dennis Görz; Bianca Rosin; Eva Streit
Original assignee: Aesculap AG
Current assignee: Aesculap AG
Priority date: 2018-03-05
Filing date: 2019-03-01
Publication date: 2021-01-13
Also published as: US11918388B2; US20210000560A1; DE102018104938A1; WO2019170550A1; CN111818947A

Abstract

The invention relates to a sieve tray (1) for receiving objects (20) to be disinfected or sterilized, comprising a base (3) which has a plurality of openings (2) and which has a base plane delimited by lateral walls (4). The base (3) is a sheet metal part which has corrugations or indentations (5) which protrude out of the base plane towards the sieve tray interior (6) and/or sieve tray exterior (7) such that the sheet metal part imitates a meshwork structure.

Description

Sterilizing mesh tray with a curl or denting / bulging

forming sheet metal floor

description

The present invention relates to a Sterilisiersiebschale, also called screen basket, such as a sterilization or disinfection screen basket, according to the preamble of claim 1. Generic screen baskets are used to in a

Cleaning and disinfection device (RDG) or autoclave in one

Processing unit for medical devices (AEMP) a portable receptacle for a number of objects to be disinfected or sterilized, such as

surgical cutting or grasping instruments.

Background of the invention

A screen basket has the primary task, in his Siebkorbinneren several

To pick up objects so that they can be handled as a unit in their cleaning process. Furthermore, when assembling the screen basket slipping or slipping of the recorded objects - in the sense of a compact loading of the screen basket - to avoid.

Furthermore, a screen basket should have as few or no sections as possible, in which cleaning liquid (i.e., water added with additive) used during the cleaning process collects, so that the filter cartridge used

Cleaning liquid drains as completely as possible from the strainer basket after the cleaning process.

Lastly, screen baskets should be careful not to break or crack, even after intensive use, during which they are exposed to shock and cutting stress, minimizing the risk of injury and cutting an operator. State of the art

From DE 20 2006 011 942 U1 a screen basket is known, which is adapted for receiving objects to be disinfected or sterilized. The screen basket has a bottom, in particular a sheet metal bottom, which, with a variety of

Openings is provided. The floor has a ground plane bounded by sidewalls.

This ground plane is designed as a kind of perforated plate plan. In order to avoid slipping or slipping of the recorded objects, a mat is inserted into the screen basket. This mat prevents the drip basket from dripping efficiently, so that even after removing the strainer basket from the RDG, any residual water will disturb the humidifying of various strainer basket areas, in particular the

Siebkorbbodens, causes.

The problem of disturbing moistening of the Siebkorbbodens also exists even if it is dispensed with the insertion of the mat. Thus, the perforated, but plane ground plane of the basket floor, that between the strainer

recorded objects and the ground according to the remaining web widths between the plate holes a surface contact is formed, on which collects residual water under capillary action, which in turn disturbing

Moisturizing promotes.

Another type of screen baskets of the prior art is as

Wire mesh configured instead of a perforated plate. A wire mesh has a corrugated ground plane, the slipping or slipping of the recorded

Counteracts objects. Furthermore, a wire mesh causes fewer surface contacts, for example, with a flat surface and consequently a lower capillary action.

A disadvantage of strainer wire mesh, however, is that not only residual water but also dirt accumulates in the individual nodes of the braid. Furthermore, inevitably occurs in a wire mesh after appropriate period of use Breaking or detachment of the individual wires, which significantly increases the risk of injury emanating from a Siebkorb-wire mesh.

Furthermore, in a screen basket wire mesh, the wall perforation corresponds to the bottom perforation. Thus, when the wire mesh is braided sufficiently coarsely to prevent slippage of the picked up objects on the ground plane, it has the disadvantage that the wall perforation is so coarse that the picked up objects can project through it, again increasing the risk of injury and makes handling difficult.

Thus, the baskets of the prior art all have the disadvantage that they cause disturbing even after removal from the RDG of adhering residual water caused further surfaces. Furthermore, they have, depending on the embodiment about the disadvantage of increased risk of injury, the disadvantage of slipping or slipping of the recorded objects and / or the disadvantage of contamination or the accumulation of germs.

Brief description of the invention

The object of the present invention, in view of this prior art, is to remedy or at least mitigate the disadvantages of the prior art, and in particular to provide a strainer basket which drips efficiently, so that it is (almost) non-irritating after removal from the RDG

Moistening other surfaces (such as a packing table) causes. This task of efficient dripping should be solved without further disadvantages, such as an increased risk of injury to a user or a slipping or slipping of the recorded items to bring.

This is achieved according to the invention by means of a strainer with the features of claim 1. Advantageous embodiments are the subject of

Dependent claims. It has been found that the forming or arranging of

Abstandsfüßen / nubs, for example, on the outer / underside of a to a

Sieve bottom processed plan perforated plate, if necessary, reduced the contact area between the strainer and a flat surface and thus could improve the overall dripping behavior, however, the production of such a special plate would be costly and expensive and thus uneconomical overall. In addition, the spacer feet / nubs would be at a certain distance from each other over the

Distributed plate surface, which could therefore possibly bend depending on the choice of the distance between two adjacent spacer feet / knobs. For these reasons, such a solution of the problem initially posed has proved to be ineffective.

The basic idea of the present invention now pursues the

Basic concept to simulate the spatial structure of a wire mesh at a first plan perforated plate by the between the plate holes extending (and intersecting) webs are at least partially or partially deformed in one or more directions different to their respective web extension direction, whereby the deformed webs themselves define at least partially point-like contact areas, for example, with a flat surface. This allows virtually any initially plane perforated plate with this additional capability, namely the provision of a virtually arbitrary number of point-like

Forming contact areas in the form of correspondingly three-dimensionally extending plate webs between the plate holes / retrofit, such as by the first plane perforated plate is subjected to a corresponding deformation step.

For example, the following further advantages can be derived from this embodiment of the strainer basket according to the invention:

- Surfaces with which the screen basket comes into contact after removal from the RDG are not moistened by it or significantly less.

- In the perforated soil structure, neither residual water nor accumulates

Dirt on.

- By eliminating a wire mesh, the risk of stabbing is eliminated. - The perforation geometry of the floor can be independent of the side walls (cost) design, so they each to the

can be adapted to different requirements.

- A slipping or slipping of the recorded objects can be prevented even without inserting a (silicone) mat.

The subject of the invention is accordingly a sieve basket for the purpose of being disinfected or sterilized (generally: to be cleaned) medical

Articles / work equipment having a plurality of perforations / perforations having bottom (bottom hole plate), which has a limited sidewalls ground plane. In this case, a medical article is understood to be one which has its use, for example, in surgery or in a related medical field.

According to the invention, the bottom of the screen basket on a sheet metal part or consists of this, which, preferably periodic, three-dimensional corrugations or indentations, also indentations or depressions, comprising, from the

Ground plane to Siebkorbinneren / inwardly and / or Siebkorbutereren / outwardly protrude, so that the sheet-metal bottom has a surface in the manner of a (wire) braid. Thus, a mesh surface structure is mimicked / simulated / imaged by a sheet metal part, whereby the structure of a mesh and that of a perforated sheet are combined synergistically with each other. Preferably, at least the sheet metal part or the perforated plate of the Siebkorbbodens has a number of through holes (pores) which are peripherally limited by intersecting / crossing webs and spaced from each other according to the web width. According to the invention, individual webs have deformations

(Bulges / serrations) in one or more directions different from their respective web extension direction in particular (alternately) toward the outside and / or inside of the screen basket, whereby a rough / toothed

Contact surface on the ground outside and / or a rough / toothed bearing surface on the bottom inside arises. In the context of this application, the term "ground plane" refers to a plate with almost constant thickness extending in two main spatial directions.

Material thickness of the sheet in a third secondary direction understood. By the

Undulations or bumps in the third sub-direction, the bottom of the bottom plate or sheet receives a three-dimensional, varying structure that deviates from that flat plate with the constant plate thickness. It is advantageous not to form the bulges / bulges in the macro range, i. to form a single indentation / bulge over a plurality of number of lands, but to provide the microinjection / bulging, i. the denting / bulging

for example, substantially within / along each one of a ridge (preferably between two or three intersection points / nodes with the other ridges) and / or at a respective selected vertex point (area within a number of circularly surrounding a single node as the center and thus the contact point Nodes).

In other words, the invention can be described functionally such that the screen basket has a bottom made of sheet metal (perforated plate / perforated plate), which (by

corresponding indentations / bulges) has / simulates the surface geometry and structure of a (wire) braid, but without being braided. Thus, the invention unfolds the effect of realizing the advantages of a braid (bottom structure with contact and fixation surfaces, efficient draining) without its disadvantages (see above). A braiding implies that two intertwined strands / wires in the

Overlapping / overlapping nodes. Such overlapping is associated with baskets with the significant disadvantage that can be found in the

Overlap site, i. the node, germs and dirt particles accumulate, as they are hard to reach and thus clean. This disadvantage clears the "braid simulation" according to the invention efficiently.

The inventive idea lies in the fact that by forming a braid-like hole sheet on the one hand slipping the to be cleaned

Objects during the packing process of the strainer basket is prevented, while the second, the presence of residual water in the strainer after the Cleaning process in the RDG is reduced or even avoided, so there is no annoying humidification (such as the packing table).

In an advantageous embodiment of the invention, the bottom of a plurality of in the ground plane in each case parallel extending Längsstrebenpaaren / Längsstegpaaren and cross strut pairs / Querstegpaaren constructed in the ground plane preferably perpendicular (or at a different angle) to each other, so that the bottom of a lattice structure with for example, rectangular

Has perforations / holes. As a pair of struts / web pair each two adjacent and running in the same direction struts / webs of the sheet metal bottom are considered. Due to the fact that the bottom has corrugations or indentations, the openings / holes preferably vary in the

Siebkorbhöhenrichtung what the normal way caused them

Capillary effect inhibits, whereby the efficient dripping is further promoted.

In particular, when viewed through the openings in the ground plane, the openings have a rectangular shape and form a three-dimensional roof shape (or butterfly shape) of the two triangles through the corrugations or bumps to Siebkorbinneren and / or Siebkorbutereren, which in each case in a plane opposite to each other Gradients are formed, that of the

Breakthroughs / holes outgoing capillary practically canceled, which counteracts disturbing moistening other surfaces. The (hypothetical) vertex of the roof shape (/ butterfly shape) preferably extends in each case between two diagonally arranged nodes of a grid structure of the ground, as has already been explained above.

A further advantageous embodiment is characterized in that in each case a web / strut pair of two struts with a waveform is formed in order to form the corrugations or indentations / bulges. Thus, in this embodiment, each strut / strut has for itself (approximately) a sinusoidal shape, ie the shape of a sine function, in order to ensure that it protrudes into the strainer basket interior or protrudes into the strainer basket exterior. Advantageously, run in this embodiment, the waveforms of the two webs / struts of a pair of web / struts complementary to each other, so that at the longitudinal or transverse position (depending on whether it is a longitudinal or a cross strut pair) on which the one strut the strut pair has a wave crest, the other strut of the strut pair has a wave trough the sine waves of two adjacent, parallel struts / struts are thus shifted by p), so that the corrugations or indentations uniformly distributed over the entire bottom, preferably with the exception of a transition edge - or frame portion in the region of the side walls (ie in an adjacent to the side walls

Transition region) are arranged. Alternatively, it may be provided that in this embodiment, the one strut of a strut pair (approximately) reflects the course of a sine function and the adjacent strut the course of a cosine function, wherein the x-axis of those functions corresponds to the parallel strut pairs. In other words, one strut has a sine shape, while the adjacent strut of the strut pair has a cosine shape or is phase-shifted by half a pi in the course.

In a preferred embodiment of the invention, the preferably smooth, i. even side walls also openings / holes / pores, but differ in their shape and size of the perforations / holes of the bottom optionally. In particular, the perforations / holes in the side walls are smaller / more fine mesh to design than those of the bottom, to protrude from the screen basket in the recorded objects from the

To prevent sidewalls and at the same time an efficient dripping through the

(more coarse mesh) to allow soil through. The invention thus allows a flexible adaptation of the individual surfaces (floor / side surfaces) to their respective (partial) functional area.

As soon as the individual struts / webs of the longitudinal strut pairs and

Crossbar pairs in lattice-like cut in the ground plane floor node, the sheet depth of a bottom node of the sheet metal depth of the remaining struts corresponds, the mesh simulation differs in the desired manner from a mesh to the disadvantage of a braid, namely the dirt-enriching Overlap at the nodes, not to take over in the braid simulation, so that the sheet metal floor according to the invention simulates / imitates / maps / projects the advantages of a braid, without bringing its disadvantages.

In this case, it is particularly advantageous if a part of the floor nodes is arranged projecting towards the screen basket interior / inwards and another part of the floor nodes is arranged protruding toward the screen basket exterior / outwards. Thus, the metal floor forms both to the inside, as well as to the outside of each point contacts, which develop no residual liquid attracting capillary action.

In this embodiment, the floor further advantageously has such a structure that a hypothetical connection line of the bottom nodes projecting towards the screen basket extends diagonally to the grid structure (ie diagonally through the openings in the ground plane) and at right angles to a hypothetical connection line to the screen basket exterior protruding bottom node runs. This allows a uniform, comprehensive design of the soil, whereby the recorded objects are kept efficiently in each ground position and the soil evenly distributed drips satisfactorily.

In addition, an advantageous embodiment of the strainer is characterized in that caused by the corrugations or dentures three-dimensional soil structure, such as ribbing, investment and

Forms fixation surfaces to be inserted into the screen basket items, which increases the positional stability of the recorded items. It is therefore no (silicone) mat to lay on the ground to ensure a secure, positive adhesion of the individual items.

The invention will be explained below with reference to preferred embodiments with reference to the accompanying figures. The figures are merely schematic in nature and are for the sole purpose of understanding the invention. The same elements are provided with the same reference numerals. Show it:

Fig. 1: a perspective view of a screen basket; io

FIG. 2: the area indicated by II in FIG. 1 enlarged schematically; FIG.

Fig. 3: the area indicated by III area of Fig. 1 schematically

increased;

FIG. 4 is a perspective view of a mesh-imitated floor; FIG.

5 is a perspective view of another embodiment of the

Braid-imitated floor; and

6 shows a detail of the strainer basket with inserted objects.

Fig. 1 shows a screen basket 1 for receiving objects to be cleaned, with a plurality of openings 2, as can be seen in the detail view of FIG. The present case with a rectangular base / ground level screen basket 1 has a bottom 3 and from each side edge outgoing, in this case four, side walls 4.

The bottom 3 is designed as a sheet metal part, which, as can be seen in the detail view from FIG. 3, has periodic corrugations or indentations 5. These corrugations 5 protrude from the ground plane to Siebkorbinneren 6 and in the present case also to Siebkorbutereren 7 out, so that the sheet metal part / the bottom of a

Braided structure surface imitated.

According to the detailed view from FIG. 2, which shows a plan view of a detail of the bottom 3, the bottom 3 has a lattice structure in the projection. This consists of a plurality of in the ground plane, i. in the present plan view, respectively parallel longitudinal strut pairs 8 (also called longitudinal web pair) and cross strut pairs 9 (also called cross bar pair) together.

A single longitudinal strut pair 8 is composed of two longitudinal struts 10, 11 together. These longitudinal struts 10, 11 extend in the ground plane, ie in the present plan view, parallel to each other. When viewed spatially (see Figures 3 and 4) it can be seen that each strut 10, 11 in the third spatial direction, namely towards Siebkorbinneren 7 and / or Siebkorbäußeren, one another

having different, approximately complementary geometry.

A single cross strut pair 9 is composed of two transverse struts 12, 13 together. These transverse struts 12, 13 extend in the ground plane, i. in the present plan view, parallel to each other. When viewed spatially (see Figures 3 and 4) it can be seen that each strut 12, 13 in the third spatial direction, namely towards Siebkorbinneren 3 and / or Siebkorbutereren out 7, one another

having different, approximately complementary geometry.

The area spanned by the openings 2 performs two functions. Firstly, it releases a contact and fixing surface 14 at the edge surface of each strut 10 to 13 which faces towards the aperture 2. This area 14 increases with the size of the apertures 2. The larger the objects to be inserted, the greater consequently the perforations 2 are to be designed so that sufficient contact and fixing surface 14 is released. Second, the allows of the

Openings 2 spanned surface dripping out of the cleaning liquid from the strainer basket 1 out. Also, the drip function increases with the size of the

Breakthroughs 2. Accordingly, the second function also stimulates the

To keep area ratio between the pairs of struts 8, 9 and the area defined by the openings 2 area less than 1. A maximum is that of the

Openings 2 spanned area set in it must be small enough to prevent Fierausfallen to be cleaned devices.

The grid structure defined by the floor 3 has floor nodes 15. According to the invention, these bottom nodes 15 are not in the same plane, since the corrugations 5 are formed. A particular advantage of the invention unfolds in that the bottom nodes 15, which are each formed by the cutting of a longitudinal strut 10, 11 with a transverse strut 12, 13, have approximately the same material thickness as the respective longitudinal or transverse strut 10 to 13. Thus, the mesh simulation according to the invention not only makes it possible to imitate a mesh, but also has the advantage over mesh that there is no overlap, ie doubling of the material thickness, but the same constant material thickness as in the rest of the floor. Before this feature is further discussed in connection with FIG. 3, two further characteristics of the present invention are introduced.

Thus, a part of the bottom nodes 15 can hypothetically connect to each other to recognize the first hypothetical connection line 16. As can be seen in the further course, those of the first hypothetical connecting line 16

connected bottom nodes 15 such bottom nodes 15, which according to a

advantageous embodiment of the invention are each arranged at the same height and protrude into Siebkorbinnere 6. They represent a wave crest 18 (see FIG. 3) of the periodic corrugations 5, so to speak.

Turned in the ground plane by 90 ° is next to the line 16 a second

to recognize hypothetical connecting line 17. This results when connecting the floor node 15 omitted from the first hypothetical connection line 16 to one another. As can be seen in the further course, the base nodes 15 connected by the second hypothetical connecting line 17 represent those base nodes 15 which, according to an advantageous embodiment of the invention, are each arranged at the same height and protrude towards the screen basket outer 7. They represent, so to speak, a wave trough 19 (see FIG. 3) of the periodic corrugations 5.

Those peaks 18 and troughs 19 are shown in FIG. Fig. 3 shows a sectional drawing through the bottom 3 (see area III of Fig. 1). The strut shown here represents a longitudinal strut 10, 11, which structurally but in their basic form does not differ from a transverse strut 12, 13. On the basis of the visible edges, it can be seen that a first transverse strut 12 branches off from each corrugation peak 18 of the longitudinal strut 10, 11, while a second transverse strut 12 emerges from each wave crest 19

Cross strut 13 goes off. The reciprocity of the wave peaks 18 and wave troughs 19 described above can be easily recognized here. The longitudinal strut 10, 11 in this case has an angular course. However, this form has only exemplary character. In other embodiments

in particular, an approximately sinusoidal waveform sought.

FIG. 3 furthermore shows that the material thickness of the bottom knot 15 does not exceed that of the remaining longitudinal strut 10, 11, as a result of which, despite the braid simulation, there is no unfavorable overlap of the struts, as was described in the introduction.

In Fig. 4, the corrugations 5 are shown in perspective. The first hypothetical connection line 16 (see Fig. 2) connects the wave crests 18, the second hypothetical connection line 17 (see Fig. 2) connects the wave troughs 19. The three-dimensional roof shape formed between four adjacent floor nodes 15 is composed of two triangles , The apex of those triangles can, depending on the consideration, between the two wave crests 18 of the four adjacent floor nodes 15 set (then the roof is closed to Siebkorbinneren 6) or between the two troughs 19 of the four adjacent floor node 15 set (then the roof towards Siebkorbinneren 6 open towards and closed Siebkorbutereren 7 out).

Fig. 4 shows that the surface formed by the apertures 2, which in the projected plan view of Fig. 2 shows a rectangular lattice structure, has a high degree of spatiality in perspective, which tends to wetting that surface of drops after removal from the RDG

reduced. In addition, the structure caused by the corrugations 5 provides sufficiently large contact and fixing surfaces 14.

Fig. 5 shows the three-dimensional corrugations 5 as well as those of them

caused corrugation in another section. As many corrugations 5 are arranged over the entire surface of the bottom 3, that the totality of wave crests 18 and troughs 19 in turn gives the impression of a plane surface to a user. Thus, according to the invention, the advantages of a flat surface (such as the trouble-free parking of the screen basket) while avoiding its disadvantages (see above) realized.

Fig. 6 illustrates a portion of a strainer basket 1. Therein are several

Objects 20, in this case surgical scissors, arranged, which remain due to the corrugations 5 and caused by them conditioning and fixing surfaces 14 in position. The strainer 1 has, in addition to the bottom 3, the side walls 4. These also have openings 21, which, however, may differ geometrically from those in the bottom 3. In the present case, the openings 21

more finely meshed than the perforations 2, so that in such a case in which the articles 20 slide toward the side wall, no lateral Flerausragen threatens from pointed portions of the articles 20. The side walls 4 are also possibly smooth, ie explicitly designed not wavy.

Tag List Screen basket

Breakthroughs of the soil

ground

Side wall

Curl or denting

Siebkorbinneres

Siebkorbäußeres

Longitudinal strut pair

Cross strut pair

First longitudinal strut

Second longitudinal strut

First cross brace

Second cross strut

Investment and fixation area

Knot bottom

First hypothetical connection line

Second hypothetical connection line

Wellenberg

trough

object

Breakthroughs of the sidewall

Claims

claims

1. Strainer basket (1) for receiving disinfectant or sterilizing

medical items (20), with a variety of

Perforations (2) having ground (3) having a ground plane bounded by side walls (4),

characterized in that

the bottom (3) is a sheet-metal part which, preferably periodically, has corrugations or indentations (5) which protrude from the ground plane to the screen basket interior (6) and / or screen basket outer (7), so that the bottom (3) has a Surface in the manner of a mesh.

2. screen basket (1) according to claim 1, characterized in that the bottom (3) of a plurality of parallel in the ground plane in each case

Longitudinal strut pairs (8) and cross strut pairs (9) is constructed, which are perpendicular to each other in the ground plane.

3. screen basket (1) according to any one of the preceding claims, characterized

characterized in that the openings (2) viewed in the ground plane have a rectangular shape and through the corrugations or indentations (5) to Siebkorbinneren (6) and / or Siebkorbutereren (7) a

Form three-dimensional roof shape of two triangles, which triangles are each formed in a plane with mutually opposite slopes.

4. screen basket (1) according to claim 2 or 3, characterized in that in each case a pair of struts (8, 9) of two struts (10, 11, 12, 13) is formed with a waveform to form the corrugations or indentations (5) ,

5. strainer basket (1) according to claim 4, characterized in that the

Waveforms of the two struts (10, 11, 12, 13) of a pair of struts (8, 9) extend complementary to each other, so that at the longitudinal or transverse position at which the one strut (10, 12) of the strut pair (8, 9) a Wellenberg (18) the other strut (11, 13) of the strut pair (8, 9) has a corrugation (19), so that the corrugations or indentations (5) distributed uniformly over the entire bottom (3), preferably with the exception of one

Transition section in the region of the side walls (4), are arranged.

6. screen basket (1) according to any one of the preceding claims, characterized

characterized in that the preferably smooth side walls (4) also openings (21), which differ in their shape and size of the openings (2) of the bottom (3).

7. screen basket (1) according to one of claims 2 to 6, characterized in that the individual struts (10, 11, 12, 13) of the longitudinal strut pairs (8) and cross strut pairs (9) distributed in lattice-like manner in the ground plane

Cutting bottom node (15), wherein the sheet material depth of a

Bottom node (15) of the sheet material depth of the remaining struts (10, 11, 12,

13) corresponds.

8. strainer basket (1) according to claim 7, characterized in that a part of the bottom node (15) to Siebkorbinneren (6) projecting out and another part of the bottom node (15) is arranged projecting towards Siebkorbutereren (7).

9. screen basket (1) according to claim 8, characterized in that a

Hypothetical connecting line (16) of the Siebkorbinneren (6) protruding bottom node (15) extends diagonally to the lattice structure and at right angles to a hypothetical connection line (17) of the screen basket outer (7) protruding toward bottom node (15).

10. strainer basket (1) according to any one of the preceding claims, characterized

in that the three-dimensional ground structure produced by the corrugations or indentations (5) forms bearing and fixing surfaces (14) for articles (20) to be inserted into the screen basket (1).