WO2004012779A1

WO2004012779A1 - Synthetic resin cast

Info

Publication number: WO2004012779A1
Application number: PCT/JP2003/003778
Authority: WO
Inventors: Shigeru Oda; Shuichi Suzuki; Minoru Amano
Original assignee: Tomoe Engineering Co., Ltd.; Konoike Medical Co., Ltd.
Priority date: 2002-08-01
Filing date: 2003-03-27
Publication date: 2004-02-12
Also published as: CN1298391C; CN1668341A; JP4189453B2; JPWO2004012779A1

Abstract

A synthetic resin cast light in weight, having sufficient durability to endure a sterilization treatment using high temperature high pressure steam, capable of superposition, transparent to allow looking at the content, and capable of being colored. A main body (2) and a lid (4) are molded from a synthetic resin containing at least one member selected from the class consisting of polyetherimide, polysulfone, polyphenylsulfone, and polyethersulfon, the inner surface (4a) of the lid (4) and the bottom surface (2a) of the main body (2) are each formed with a number of vent holes (5) to allow the high temperature high pressure steam to pass through the main body, a filter holding plate (7) holding a filter (6) abutted against these vent holes (5) is attached in position, and a silicone packing (32) is mounted in the junction between the main body (2) and the lid (4).

Description

Description Synthetic resin cast Technical field

The present invention relates to a container used to store gauze, absorbent cotton, and the like in a medical site such as a hospital, and particularly to a cast configured to allow high-temperature and high-pressure steam for sterilization. . Background art

In medical sites such as hospitals, containers called “casts” are widely used. The cast contains gauze, absorbent cotton, etc. to be sterilized, sterilized as it is (usually by sending high-temperature, high-pressure steam into the cast), and then used. It is intended to contain and store such sterilized gauze and the like. FIG. 8 is a view showing the structure of a conventional typical cast 51. As shown in FIG. As shown in the figure, the cast 51 basically includes a box-shaped main body 52 and a lid 54. The lid 54 is connected to the main body 52 via hinges 53, 53 so that the upper part of the main body 52 can be opened and closed.

If this cast 51 is used, it is attached to the bottom surface 52 a of the filter 52 and the inner surface 54 a of the lid 54 as shown in the figure. Can be

As shown in the figure, the bottom surface 52 a of the main body 52, the lid 54, and the filter holding plates 57, 57 for fixing the filter 56 are provided with a large number of Vent holes 55 (55a-d) are formed. These ventilation holes 55 are for passing high-temperature and high-pressure steam during sterilization. Here, the sterilization process will be briefly described. Usually, this process is performed by introducing a cast 51 containing gauze or the like to be sterilized into an autoclave machine (a high-temperature high-pressure steam sterilizer). . Inside the autoclave machine, high-temperature, high-pressure steam adjusted to a temperature of 130 to 140 ° C is circulated, and the main body 52, lid 54, and filter of the cast 51 are retained. Since many air holes 55 are formed in the plates 57 and 57, when the cast 51 is introduced into the autoclave machine, high-temperature and high-pressure steam flows into the air holes 55 a (or , Through the ventilation hole 5 5 c) of the filter holding plate 57, the filter 56, the ventilation hole 5 5 d of the finometer holding plate 57 (or the ventilation hole 5 5 b of the bottom 52 a of the main body 52). As a result, the gauze and the like inside the cast 51 are sterilized.

As described above, since it is subjected to a high temperature condition during the sterilization process, the conventional cast 51 is designed to avoid deformation due to heat, and to improve durability and impact resistance. Most are made of stainless steel. However, there is a problem that it is difficult to carry a plurality of stainless steel casts at the same time due to the heavy weight. Also, since there are few opportunities to carry heavy casts in a stack, conventional stainless steel casts have not been structured to allow multiple stacks.

Also, stainless steel casts cannot be seen from the outside, so the type (gauze and absorbent cotton), size, To check the amount, it is necessary to open the lid and look inside. However, the more time and number of times the lid is opened, the greater the risk that various bacteria enter the interior.

Incidentally, in actual medical practice, a color tape or the like is attached to the outside of the cast to distinguish the contents so that the contents can be identified.However, in this method, the type of the contents can be confirmed. However, there is a problem that the remaining amount cannot be checked. In addition, there is a problem that it is necessary to peel off the tape after use, and if the adhesive of the tape remains, germs easily adhere to the adhesive, which is not preferable in terms of hygiene. The present invention has been made to solve the problems of the prior art as described above, and has sufficient durability against sterilization and impact of high-temperature and high-pressure steam, and is lightweight, An object of the present invention is to provide a synthetic resin cast that allows the contents to be easily checked. Disclosure of the invention

The cast made of synthetic resin according to the present invention comprises a box-shaped main body having an open upper surface, and a lid attached to an upper portion of the main body via a hinge and configured to be able to open and close the open upper surface of the main body. The main body and the lid are formed of a synthetic resin containing at least one of polyether imide, polysulfone, polyphenylsanolone, and polyethersulfone so that high-temperature and high-pressure steam can pass through the main body. In addition, a large number of ventilation holes are formed on the bottom of the lid and the bottom of the main body, respectively, and a means for holding a filter in contact with the ventilation holes is attached to the joint between the main body and the lid. It is characterized by a silicone packing. When polyetherimide or polyphenylsulfone is used as the synthetic resin for molding the main body and lid of the synthetic resin cast according to the present invention, a cast excellent in terms of resistance to high-temperature and high-pressure steam and strength is manufactured. can do.

Further, when a fitting portion having a shape such that a lower portion of another cast of the same type is fitted on the upper surface of the lid portion, the cast can be stably stacked upward. It is.

Furthermore, when the main body and lid are made of transparent resin, the type, size and remaining amount of the contents can be checked without opening the lid, reducing the number of times the lid is opened and closed, and shortening the opening and closing time As a result, the risk of bacterial invasion can be reduced.

In addition, when the main body and the lid are made of a synthetic resin, various colors can be applied. If casts of various colors are prepared, the casts can be used in different colors for each content. For example, gauze (small) can be used in pink cast, gauze (large) in orange cast, absorbent cotton (small) in blue cast, and absorbent cotton (large) in purple cast. People can extract exactly what they need. In addition, green casts can be used in sterile rooms, and yellow casts can be used in wards with infectious diseases. Can be suitably suppressed to prevent hospital-acquired infections and the like.

In addition, at least one of the many air holes formed in the bottom and lid of the main body is formed in the shape of a long hole, and extends along the resin flow direction when the resin is injected into the mold. With such a configuration, the bottom surface and the lid of the main body can be efficiently manufactured by injection molding, and their physical properties (strength) can be improved. Further, the synthetic resin cast according to the present invention has a fastener for fixing the filter holding means to the lid and the bottom surface of the main body, and is present inside the main body when the lid is closed. When the filter holding means and fasteners are made of synthetic resin containing at least one of polyether imide, polysulfone, polyphenylsulfone, and polyethersulfone, metal inside the cast Since no parts made of casts are used, no pollutants such as rust and metal powder enter the interior of the cast, and the contents of the cast can be stored cleanly.

Further, the fastener has an insertion shaft provided with a protruding portion, and a head configured to press the holding means against the bottom of the sandalwood and the main body. Has a hole, and a step portion is provided inside the hole so that the fastener is fixed by engaging a projecting portion provided on the insertion shaft. The fastener is fixed by inserting the insertion shaft of the fastener into the hole and rotating it, and engaging the projecting portion with the step to fix the fastener. In a case where the holding means is pressed against the bottom of the main body and fixed to the head, the holding means can be easily fixed to the lid and the main body. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a cast 1 according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a method of attaching the filter 6 to the cast 1 shown in FIG.

FIG. 3 is a diagram illustrating a state in which the filter holding plate 7 is fixed to the lid 4 by the fastener 8.

FIG. 4 is a vertical sectional view of the filter holding plate 7 and the like taken along the line AA in FIG. FIG. 5 is an explanatory view of a method of molding a resin plate 41 having a through hole 40 by injection molding.

FIG. 6 is a horizontal sectional view taken along the line BB of the lower mold 42b shown in FIG.

FIG. 7 is a horizontal sectional view taken along the line BB of the lower mold 42b shown in FIG.

FIG. 8 is an explanatory diagram of a method of attaching the filter 56 to the conventional cast 51. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a cast 1 according to a first embodiment of the present invention. As shown in this figure, the cast 1 is basically constituted by a box-shaped main body 2 and a lid 4 thereof. The lid 4 is connected to the main body 2 via hinges 3 and 3 so that the upper part of the main body 2 can be opened and closed. When this cast 1 is used, filters 6, 6 as shown in FIG. 2 are attached to the bottom surface 2a of the main body 2 and the inner side surface 4a of the lid 4, respectively. Can be

As shown in the figure, a number of ventilation holes 5 (5a) are provided on the bottom surface 2a of the main body 2, the lid 4, and the filter holding plates 7 and 7 (filter holding means) for holding the filter 6. ~ D) are formed. These vents 5 are for passing high-temperature and high-pressure steam into the inside during sterilization. The filter 6 allows high-temperature and high-pressure steam to enter and exit through the vents 5 during the sterilization. Later, it is to prevent the invasion of various bacteria into the cast 1. The filter holding filter 6 The luter holding plate 7 is fixed to the inner surface 4 a of the lid 4 and the bottom surface 2 a of the main body 2 by a fastener 8. In the cast 1 according to the present embodiment, the main body 2, the lid 4, and the filter holding plates 7, 7 are made of a synthetic resin material, so that the weight is reduced as compared with a conventional stainless steel cast. In addition, since the synthetic resin material is made of transparent material, the inside of the cast 1 can be seen from the outside, and the type, size and remaining amount of the contents contained in the cast 1 can be determined. It can be checked without opening the lid 4.

In addition, since synthetic resin materials are superior in workability as compared with metals such as stainless steel, the degree of freedom in design is improved when the cast is formed of synthetic resin material as compared with the case of using metal. In addition, since the synthetic resin material has elasticity, it is possible to manufacture an engagement means and the like described later by utilizing this property.

Incidentally, synthetic resin materials having such transparency and having sufficient durability against sterilization treatment and impact under high-temperature and high-pressure steam include polyetherimide and polyether. It is preferable to use tersulfone (PES), polycarbonate, polysulfone, or polyphenylsulfone. Among them, polysulfone, polyphenylenolethanolephon, polyether sanolehon, which have excellent resistance to high temperature and strength. Preference is given to using polyether imides. Among them, it is more preferable to use polyetherimide or polyphenylsulfone from the viewpoint of high temperature and high pressure steam resistance. Next, a method of fixing the filter holding plate 7 using the fastener 8 will be described in more detail. Fig. 3 shows the filter holding plate 7 illustrates how the cover 7 is fixed to the cover 4.

The fastener 8 has a head 10 and an insertion shaft 11 as shown in the figure, and the insertion shaft 11 is provided with a projecting portion 12. A head 13 is provided on the upper surface of the head 10. The grip 13 has a length in the longitudinal direction shorter than the diameter of the upper surface of the head 10, and protrusions 13 a and 13 a are provided at both ends thereof.

A counterbore 16 is provided in the filter holding plate 7. The counterbore 16 has a counterbore 16a shaped to receive the head 10 of the fastener 8, as shown. In addition, a stopper 18 is formed integrally with the filter holding plate 7 on the filter holding plate 7. The stopper 18 has two arms 20 and 20 as shown. At the tip of each of the arms 20, 20, a concave portion 19 having a shape corresponding to the convex portion 13 a of the knob 13 is provided to hold the knob 13.

As described above, since the stopper 18 is formed integrally with the filter holding plate 7 (that is, formed of a synthetic resin material), the stopper 18 has elasticity. Therefore, the arms 20 and 20 can move in the directions indicated by the arrows M, respectively.

By the way, in FIG. 3, the fastener 8 and the filter holding plate 7 are shown in a separated state for easy understanding of the structure of the fastener 8 and the like. The head 10 is inserted into the counterbore 16 until the lower surface of the head 10 contacts the counterbore 16 a, and is used by being attached to the filter holding plate 7.

In this case, as described above, since the length of the head 13 in the longitudinal direction is shorter than the diameter of the upper surface of the head 10, the upper surface of the head 10 is suppressed by the tip of the arm 20. Will be done. Therefore, Gamma 1 3 It is designed so that it does not fall out of the hole 16 (so that it does not move to the right in the figure).

Then, in the above state, when the head 13 is oriented as shown in FIG. 3, the protrusions 13 a and 13 a of the head 13 are respectively connected to the recesses 19 and 19 of the arm 20. Since the clamp 8 is held by 1 9, the rotation of the fastener 8 is restricted. On the other hand, in this state, when the knob 13 is picked and the fastener 8 is rotated, the arms 20 and 20 are expanded, respectively, and the knob 13 is released from the recesses 19 and 19. Therefore, the fastener 8 can rotate in the counterbore 16.

Due to the structure of the stopper 18 described above, the fastener 8 can be rotated while snapping in the counterbore 16 provided in the filter holding plate 7.

The cover 4 to which the filter holding plate 7 is fixed is provided with a hole 9. The opening 9 on the outer surface 4 b of the cover 4 (the rear surface in FIG. 3) is smaller than the opening size on the inner surface 4 a of the cover 4 (the front surface in FIG. 3). It has a large size and is a “stepped hole” with a step 14 provided in part. Further, a filter guide 15 is provided around the hole 9 in the inner surface 4 a of the lid 4, and the height h of the filter guide 15 is the thickness d of the filter 6. It is formed to have almost the same size as.

Then, the fixing to the lid 4 is performed by inserting the insertion shaft 11 of the fastener 8 attached to the filter holding plate 7 into the through hole 17 provided in the filter 6 while keeping the orientation as shown in the figure. After that, this is inserted into the hole 9, and then the fastener 8 is rotated to engage the protruding portion 12 with the stepped portion 14 and lock the fastener 8.

In this way, the fastener 8 is locked, so that the filter holding plate 7 Is pressed against and fixed to the inner surface 4 a of the lid 4 by the head 10 of the fastener 8. For reference, the state in which the filter holding plate 7 is fixed to the lid 4 by the fastener 8 is shown in FIG. 4 (a cross-sectional view of the filter holding plate 7 and the like along the line AA in FIG. 3). ). Note that the fastener 8 is shown in a side view instead of a sectional view.

In the above description, the method of fixing the filter holding plate 7 to the lid 4 has been described as an example.However, the method of fixing the filter holding plate 7 to the bottom surface 2a of the main body 2 is the same as the method described above. You can do it.

Further, the method of fixing the filter holding plate 7 to the lid 4 and the bottom surface 2a of the main body 2 is not limited to the method of fixing with the fastener 8 described above. It is also possible to carry out by known technical means such as fastening. As shown in FIG. 2, the cast 1 according to the present embodiment is provided with a silicone packing 32 having a hollow portion at an upper edge portion (or a peripheral portion of a lid) of the main body 2 of the cast 1. As a result, when the lid 4 is closed, the tightness of the cast 1 is improved, so that invasion of various bacteria and the like into the cast 1 can be prevented.

Further, the main body 2 and the lid 4 are provided with an engagement means (a hook 30 and a hook receiving part 31) for maintaining the lid 4 in a closed state. Like lid 4, it is made of a synthetic resin material, which improves design freedom.

Further, in the present embodiment, a fitting portion (annular convex portion 33) is provided on the upper surface of the lid 4 at a position near the periphery thereof. The fitting portion has a shape such that the lower portion of another cast of the same type fits, and thus a plurality of casts 1 can be stably stacked. Further, in the synthetic resin cast according to the present invention, the filter-holding plate 7 and the fastener 8, which are present inside the main body 2 when the lid 4 is closed, are made of polyether imide, polysulfone, polyphenylsulfone. Polyester Since it is composed of synthetic resin containing at least 3% of tersulfone, no metal parts are used inside the cast, so contaminants such as rust and metal powder enter the cast. And the contents of the cast can be kept clean.

Furthermore, the insertion shaft 11 of the fastener 8 is inserted into the hole 9 and then rotated, and the projection 8 is engaged with the stepped portion 14 to fix the fastener 8, whereby Filter holding plate 7 Force The lid 4 and the bottom surface 2a of the main body 2 are pressed and fixed to the head 10 so that the filter holding plate 7 can be easily attached to the lid 4 and the main body 2. Can be fixed. By the way, in the present embodiment, the air holes 5 formed in the main body 2, the lid 4, and the filter holding plate 7 are formed in a long hole shape as shown in FIG. However, these air holes 5 extend in a direction closer to the flow direction of the resin when the resin is injected into the mold (radiation direction from the resin injection port) than to the extension direction of the side surface of the main body 2. As a result, the main body 2, the lid 4, and the filter holding plate 7 can be efficiently manufactured by an injection molding method.

This will be described in more detail. For example, when a resin plate 41 having through holes 40, 40 as shown in FIG. 5 is to be manufactured by an injection molding method, a lower mold 42b and an upper mold 42a are required. Is set, and the resin is injected from the resin injection port 44 into the space formed between them. At this time, as shown in FIG. In the mold 42, it spreads radially (in the radial direction) from the resin inlet 44. I will continue.

However, since the projections 35, 35 for forming the through holes 40, 40 are formed in the mold 42, the injected resin 43, As a result, the space inside the mold 42 is gradually filled in a state as shown in FIG.

As described above, when injection molding is performed using the mold 42 having the protrusions 35, the back side (the back side when viewed from the resin injection port 44) of the protrusions 35 (blind part 4 6) In general, the resin 43 is difficult to reach, so that the resin 43 needs to be injected at a high pressure in order to completely feed the resin 43 into those portions.

If the injection pressure of the resin 43 is insufficient, a portion corresponding to the blind portion 46 in the molded product may be insufficiently filled or chipped (defective molding), and may be injected. A similar problem may occur when the viscosity of the resin 43 becomes too high.

The frequency of occurrence of such a problem depends on the shape of the projections 35 and the direction of diffusion flow of the luster 43. As the number of the projections 35 increases, the number of the blinds 4 increases. It can be said that the larger the total area of 6, the higher it becomes.

On the other hand, in the main body 2, the lid 4, and the filter holding plate 7 of the force strike 1 according to the present embodiment, the ventilation holes 5 (5 a to 5 d) are all formed in a long hole shape (first (See Figure and Figure 2). Therefore, even when the opening area equivalent to the total opening area of the ventilation holes 55 in the conventional cast 51 (see FIG. 8) is secured, the case where the ventilation holes 55 are circular as in the conventional case is considered. In comparison, the number of air holes 5 can be reduced, so that the number of protrusions for forming the air holes 5 can be reduced in a mold required for injection molding.

In addition, the ventilation hole 5 is used to prevent the resin from diffusing and flowing when the resin is injected into the mold. That is, the resin injection port (in the present embodiment, the resin injection port of the mold is formed at a position corresponding to the central portion 45 of the main body 2, the lid 4, and the filter holding plate 7.) It is formed so as to extend in the direction almost coincident with the “radiation direction” from the sky. Therefore, when the resin is injected into the mold, the resin can be smoothly advanced, and the total area of the blind portion (see reference numeral 46 in FIG. 7) can be significantly reduced.

Furthermore, since the ventilation hole 5 is formed in a long hole shape, even if the opening area equivalent to the total opening area of the ventilation hole 55 in the conventional cast 51 is secured, the ventilation hole is formed as before. As compared with the case where the pores 55 are circular, the distance between the adjacent vents 5 can be made larger, so that the molded article having sufficient strength is less likely to be sunk between the vents 5 and 5 ( The main body 2, the lid 4, and the filter holding plate 7) of the cast 1 can be manufactured.

Thus, in the present embodiment, not only can the number of protrusions be reduced, but also the resin can flow smoothly in the mold during resin molding, and the total area of the blind portion Can reduce the frequency of insufficient filling or chipping (defective molding) of the portion corresponding to the blind part, and can increase the distance between adjacent ventilation holes. . Therefore, it is possible to efficiently produce a molded article having a sufficient strength, which is less likely to lump between the ventilation holes. Industrial applicability

As described above, the cast according to the present invention is made of a synthetic resin, and has the advantage that it is light in weight and easy to carry.

Further, when the cast according to the present invention is formed of a transparent synthetic resin, it is necessary to open the lid to check the type and the remaining amount of the contained matter. There is no problem of unnecessarily exposing gauze and cotton wool to the open air and contaminating them.

Furthermore, a silicone packing having a hollow portion is attached to the upper edge of the cast main body, and the hook attached to the cast lid is hooked to the hook provided on the main body. As a result, the closed lid can be securely fixed, so that the tightness of the cast can be improved when the lid is closed, and the invasion of various bacteria and the like into the cast can be prevented appropriately. . Also, since the inner peripheral part of the protrusion provided near the periphery of the lid upper surface is slightly smaller than the outer part of the lower part of the cast body, when stacking multiple casts upward, A plurality of casts can be stably stacked by fitting the lower part of the main body of the casts stacked on the upper surface of the lid.

Further, in the synthetic resin cast according to the present invention, since the filter holding means and the fastener, which are present inside the main body, are made of synthetic resin, parts made of metal and the like inside the cast are provided. Since it is not used at all, no contaminants such as rust and metal powder are mixed into the interior of the cast, and the contents of the cast can be stored cleanly.

Also, after inserting the insertion shaft of the fastener into the hole, it is rotated, and the projection provided on the insertion shaft is engaged with the step to fix the fastener. Since the holding means is fixed to the lid and the bottom surface of the main body by pressing against the head of the fastener, the holding means can be easily fixed to the lid and the main body.

Also, as described above, the number of protrusions in the mold can be reduced, the total area of the blind portion can be reduced, and the resin can flow smoothly in the mold during injection molding. In addition, since the distance between adjacent air holes can be increased, there is a Thus, a molded article of a synthetic resin having a sufficient strength can be produced very efficiently.

Claims

The scope of the claims

1. A cast comprising: a box-shaped main body having an open upper surface; and a lid attached to an upper portion of the main body via a hinge and configured to open and close the open upper surface of the main body. The main body and the lid are formed of a synthetic resin including at least one of polyether imide, polysanolone, polyphene / resanolephone, and polyetherenolesone, and high-temperature and high-pressure steam can pass through the main body. As described above, the lid and the bottom surface of the main body are formed with a large number of ventilation holes, respectively, and the holding means for the filter that is in contact with the ventilation holes is attached. Is equipped with a silicone resin packing, which is equipped with a silicone packing.

2. On the upper surface of the lid, a fitting part is formed so that the lower part of another cast of the same type fits, and it is configured so that it can be stably stacked upward. The cast made of synthetic resin according to claim 1, characterized in that:

3. The synthetic resin cast according to claim 1, wherein the main body and the Z or the lid are formed of a transparent resin.

4. At least one of the vent holes formed in the bottom surface of the main body and the Z or the lid is formed in a long hole shape, and along a flow direction of the resin when the resin is injected into the mold. The cast made of a synthetic resin according to any one of claims 1 to 3, characterized in that it is extended.

5. There is a fastener for fixing the holding means of the filter to the lid and the bottom surface of the main body, and the holding means and the fastener to be present inside the main body when the lid is closed, Polyetherimide, poly The method according to any one of claims 1 to 4, characterized in that it is composed of a synthetic resin containing at least one of sanolefone, polypheninolesanorefone, and polyethersulfone. The synthetic resin power strike as described.

6. The fastener has an insertion shaft provided with a projecting portion, and a head configured to press the holding means against the lid and the bottom surface of the main body. A hole is provided in the lid and the bottom surface of the main body, and a protrusion provided on the insertion shaft is engaged with the inside of the hole so that the fastener is fixed. A configured step is provided, and the insertion shaft of the fastener is inserted into the hole and then rotated, and the fastener is fixed by engaging the projecting portion with the step. The composition according to claim 5, wherein the holding means is fixed to the lid and the bottom surface of the main body by being pressed against the head. Resin cast.