CZ2008799A3 - Cross piece for bed supporting surface, molding process and dissected bed supporting surface intended for hospity bed - Google Patents

Abstract

The base (20) for the base of the beds is a monolithic body of thermoplastic material, with a molded upper side provided with protrusions and a bottom side with the recesses (220) with recesses (221) proximate the two cells (201, 202) of the bar (20). Each turret (220) is provided with a recess (221) for engaging the bed frame (10) of the bed. A saddle (230) is formed at the lower side between the edge (203) of each of the two cells (201, 202) of the bar (20) and the closest respective barrel (220). Furthermore, the invention relates to a method of making such blow molding devices (20) by blow molding technology, and the invention also relates to a divided bed surface of a bed comprising bars (20).

Description

RAIL FOR THE SURFACE A BED, METHOD OF FORMING AND A DIVISIONED SURFACE BED FOR A HOSPITAL BED

FIELD OF THE INVENTION The present invention relates to a partition intended for a bed base, a method of forming, and a segmented bed base, particularly intended for public facilities such as hospital wards.

The invention can be used in the field of technical equipment for the hospital sector, in particular in hospitals, clinics and treatment institutions, in long-term care facilities and in nursing homes, but also in other areas where bedding is necessary which: it is comfortable and at the same time serves to treat a patient who spends a longer time on this bed and who has the characteristics necessary to achieve a high level of hygiene and modularity. they can be made possible by the articulated bed surface.

In order to achieve such positions, it is common to use such technical beds which are provided with a subdivided base surface and which allow, in particular, the adjustment of the base surface from a position originally flat to a position adapted only for this case with raised or lowered parts.

A traditional hospital bed is well known. It consists of a rigid frame, mostly metal, to which the headboards and legs are attached. Almost all of the beds currently available are technical in view of the need to allow a wide range of patient positions, which means that they must meet specific, especially standard hospital requirements. It is also known that the frame can have a different design to allow movements of the bed base on which the patient support mattress lies, such as from a flat starting position to another by lifting one end relative to the other or both ends according to the patient's needs and the type of therapy that is taking place in the patient.

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BACKGROUND OF THE INVENTION The traditional bed base for receiving a mattress, whether hospital or domestic bed, occupies the entire area defined by the bed frame and consists of one or more other structures which may be interconnected and they may be elastically yielding. This is the case with traditional metal elastic springs or bent transverse wooden slats, wherein the ends of the stitches or slats are inserted circumferentially either along the static frame of the bed or alternatively along the circumference of at least one other frame that cooperates with the first frame. An example is the embodiment of DE4007570 (Voelker). These embodiments have remained virtually unchanged for years until recently, as those skilled in the art have found their absolute unsuitability, mainly due to the fact that they could not be sterilized and cleaned effectively.

The technical requirements of different sectors of the hospital sector are also known, such as in the case of the resuscitation and long-term care departments, where a bed designed in the traditional way must be equipped, unlike conventional beds, with a bed base which can be changed. in more points. In this case, it is a base with sections and joints, where the sections are flat surfaces for the mattress, divided into two to four straight, hinged surfaces one behind the other, or one for the back part and another for the foot part - in version more or less long - and one or two central faces for the pan support portion. SE449301 (Bergling) describes a respective base surface solution with several sections and joints, where each section consists of a single base that can be moved by a series of separate joints. In the same way, US4674140 (Boonants et al.) Proposes a structured subfloor composed of several parts and joints. Each part includes a frame to which the bars are transversely connected, each parallel to each other and spaced apart. Also in CA2312146 (Onorato), strips of solid material are described which are intended to be fixed to the orthopedic bed frame.

Traditional parts that have so far characterized such backing surfaces are formed from a hot-formed base of plastic in various sizes. The base that must be removed for cleaning is simply placed on a corresponding metal perimeter frame that is mobile and acts as a support that is • · · · ·

known technology connected to the static construction of the bed. The second property is due to the particular structure of the panels from which the articulated surface is formed and which comprises a series of openings for ventilation of the mattress from bottom to top and vice versa and a series of protrusions which allow to keep the mattress slightly raised relative to the base. The projections arranged symmetrically in parallel rows are separated by apertures and longitudinal plates, in this case two, which divide the projections into three rows, thereby forming ventilation ducts which are also longitudinal therebetween. See, for example, the applicant's hospital beds listed at www.favero.it. FR2763489 (Zedda) discloses a process for manufacturing hospital beds and hospital bed components such as bases or baseplates that attach to a rigid frame, which is generally made of metal. These boards can now be solid or hollow and are manufactured by thermoforming of plastics such as ABS class V0 / r2 according to UL94. The invention of FR2763489 (Zedda) is designed using materials such as PET, APET, CPET and PBT and ABS and finally HDPE.

Kluwer's "POLYMER PROCESSING AND STRUCTURE DEVELOPMENT" article by N. Wilkinson and A. Ryan has been described in the literature in which a blow molding technique is described. This method basically uses a wide range of polymers such as HDPE, PET U-PVC and PP. Essentially, the following steps are needed:

a tubular preform formed by injection molding or injection molding;

the temperature controlled preform is transferred to a thermally regulated mold;

- the pre-shape is sealed and inflated as required until the contour of the mold is reached;

- shaping requires internal pressure until the product solidifies;

- then the pressure is released and the mold is opened so that the finished product can be removed. The blow molding technique originates from the glass shape processing process and is currently widely used for obtaining plastic bottles, containers in general and the automotive industry.

It is therefore appropriate to regard as a common standard:

- hospital bed with rugged ground;

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- a bed base for a hospital bed, divided into sections and hinges, a flat surface or a base for each section, compact or shaped and provided with openings;

- a bed base for a hospital bed, wherein each section comprises a support frame of strips or slats that are laid transversely and parallel to each other;

the material of which each individual surface or base is made is a plastic thermoplastic material such as HDPE, PET U-PVC, PP, ABS.

Disadvantages Briefly, according to the Applicant, some disadvantages persist with the solutions used hitherto. In particular, it relates to the solutions that are most widely used and which utilize the base surfaces of beds with several sections, each section having its corresponding base or platform. In these cases, each platform or base belonging to the bed base section is too large in size, which, in practical terms, gives rise to justified difficulties in handling normal or emergency cleaning operations, performing hygienic operations and sterilization, requiring precise handling during removal and removal. transportation of parts of the base area with which it is worked. All of these difficulties, which, in addition to making it difficult to handle, can cause improper treatment of the individual parts and, as a result, risk becoming a carrier of undesirable pathological sources.

A further disadvantage arises from the fact that each individual frame belonging to the section in question needs a base of the same size, each frame of the bed base has its own base, which requires attention and expertise in their refitting as well as justified complications at the manufacturing stage product with subsequent problems with keeping a large number of codes in the warehouse.

Furthermore, it has been found that the bases manufactured conventionally need local reinforcement by fastening to the frame of each section and the local struts on which the individual bases are placed. Thus, these solutions significantly complicate the manufacture of the bed and base and further contribute to an increase in the total weight, which in turn makes handling difficult. Moreover, the mentioned struts with their construction are not even radiotransparent, which complicates also radiodiagnostics.

[0014] In the case of bases produced by traditional thermoforming or rotary molding technologies. molding, they do not allow a satisfactory finish, as the palpation detects distinct edges, which has a significant impact on quality. In addition, in the case of rotary forming technology, it is not possible to obtain products of the flame retardant class VO.

When using conventional base manufacturing processes, such situations occur that if the process requires low investment, the production cost per product is high, as is the case with the thermoforming technology, or on the contrary large investment is required, but the production cost One product is low, as is the case with injection molding. The investment costs are therefore proportional, but in fact the production costs are definitely higher in the case of rotary forming. Thus, this is not a production process that would represent a balanced relationship between investment costs and the cost of the finished product.

Finally, as far as the solution of the crossbars attached to the frame of each corresponding section is concerned, it has been found that these are mostly made of wood, i.e. combustible, and substantially fixed so that they cannot be removed from the frame. Therefore, they are almost unusable, both because they cannot be easily removed and because they are wooden and cannot be treated in the same way as is common in conventional cycling processes of substrate cleaning and sterilization and therefore do not comply with standards.

Therefore, there is a need on the part of companies and workers in the art to find an innovative solution that is generally better in quality compared to previous solutions.

It is also an object of the present invention to overcome the disadvantages described above.

SUMMARY OF THE INVENTION These objects are solved by the present invention with the features set forth in the appended claims, solving said problems by means of a partition for a bed base, a method of shaping a partition and a segmented bed base of a hospital bed. or rotary forming is a monolithic body with an upper side provided with raised plates which are alternated by channel-shaped grooves oriented perpendicularly to the longitudinal axis of the partition and with the lower

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A side provided with at least two protrusions projecting beyond the face of the forehead near the two upper parts of the partition, each protuberance being provided with a first recess for securing a corresponding pin extending from the inner frame profile of each section of the bed base surface, and wherein at the lower side between the edge of each of the two upper parts of the partition and the nearest projection there is a corresponding seat for mounting on the frame. A bed surface of a hospital bed is provided in which each section of the bed surface includes at least one partition formed by blow molding technology and attached to a corresponding portion of the frame.

Objectives With the considerable creative benefit that results in immediate technical progress, various goals and advantages are achieved.

Firstly, because each section of the bed base area consists of one or more small partition walls, handling is facilitated for the operator to perform routine and extraordinary maintenance of the bed base, including cleaning and sterilization. Even the worker can independently and easily take care of the removal, even partial, of the partition walls, which he can manipulate, move, even in confined spaces.

Secondly, the characteristic of the partition structure is such that it defines the partition as a modular element so as to contribute, if any, to the filling of one section, the frame of which is also different in size from that of the side section.

Furthermore, the production of each partition which forms the base section sections by blow molding or rotary forming technology allows the partition and the associated base surface to have their own structural flexibility that can support and improve the function of the mattress to perfectly conform to shape and stress under continuous load.

The quality objectives are also achieved. In particular, blow molding technology makes it possible to obtain a product which is clearly visible and palpable that it is a solid product, thus having a more favorable appearance and a better hand-feel, due to the lack of sharp edges and overall delicate shapes .

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Another purpose relates to the fact that each crossbar is self-supporting and does not need support beams, which contributes to the reduction of the total weight of the bed base area while allowing radiodiagnostics.

Finally, one object relates to a manufacturing process of a partition which, because it is based on blow molding technology, allows a low cost of the product, as in injection molding, but in contrast to it at a low investment cost.

These and other advantages that have made it possible to realize a technologically innovative product will become apparent from the following detailed description of the preferred exemplary embodiment with the aid of the attached schematic drawings, the implementation details of which are not binding, but merely illustrative.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 is a three-dimensional view of a crossbar according to the invention; Fig. 2 is a bottom three-dimensional view of the crossbar of Fig. 1; Fig. 3 is a plan view of the crossbar of the preceding figures; Fig. 4 is a side view of the crossbar of the preceding figures;

Fig. 5 is a partial longitudinal sectional view of the crossbar of Fig. 3 taken along the axis A-A;

Fig. 6 is a view of the top of the crossbar of the preceding figures;

Fig. 7 is a cross-sectional view of the bar of Fig. 3 taken along line B-B;

Fig. 8 is a cross-sectional view of the bar of Fig. 3 taken along line C-C;

Fig. 9 is an enlarged view of detail D;

Fig. 10 is an enlarged view of detail E;

Fig. 11 is a bottom view of the crossbar of the preceding figures;

Fig. 12 is a side view of the crossbar of the preceding figures;

Fig. 13 is a cross-sectional view of the bar of Fig. 11 taken along line F-F;

Fig. 14 is a bottom view of one of the sections that form the articulated bed area of the hospital bed for the long-term patient, the section consisting of a frame and respective partitions attached thereto.

DETAILED DESCRIPTION OF THE INVENTION With reference to the figures, it can be stated that a hospital bed, in particular intended for hospital separation, comprises a support surface to support the mattress.

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or a padding or portion of padding on which the patient lies. The hospital bed essentially comprises a main frame, at the ends of which the forehead or headboard and footboard are attached. A bed base is attached to the main frame, which may be a single section or divided into a number of sections, thus composed of several sections 1 (Fig. 14) of different sizes and several articulated joints, thus allowing to change position and / or height .

Each section 1 (Fig. 14) consists of a single, generally quadrilateral and usually tubular frame 10, on which one or more crossmembers 20 lie transversely arranged parallel to each other and at a small distance from each other so that they can at least cover the area defined by the circumference said frame 10, even protruding along one or more sides beyond the edges of the frame 10. On two opposite and parallel sides 101, 102 of the quadrilateral frame 10, on faces 103,104 facing the area delimited by the frame 10, contact pins 11, specifically three for each side 101,102, at the same distance from each other and symmetrically to each other. The function of these bolts 11, see FIG. 14, is to secure the respective partition 20 by means of a frame 10 for supporting it in a stable, removable position.

Each partition 20 (FIGS. 1 and 2) is a molded monolithic body made by blow molding or rotary molding of a thermoplastic material such as PP (polypropylene) or ABS (acrylonitrile-butadiene-styrene), each bar 20 having a rectangular shape (FIG. 3). The crossbar 20 consists of a central portion 200 and two faces 201, 202, formed on the upper (FIG. 1) and lower (FIG. 2) sides as well as along the peripheral edge 203, which is rounded. The size of the crossbar 20 relative to its longitudinal axis xx is such that its length is greater than the width and greater than the axis length between the parallel sides 101, 102 of the frame 1 of section 1 so that the upper portions 201,202 of the crossbar 20 project outwards 101, 102 of the frame 10 (FIG. 14). The term length of the partition 20 refers to the partition 20 in the unassembled state, but when the partition 20 is arranged in the seat, i.e. when it is assembled on the frame 10 of section 1, it is called the width of the partition 20.

The upper face of each partition 20 (Figs. 1 and 4) is formed with protrusions, in particular designed to form at least two adjacent plates, for example four plates 210, 210b, 210c, 21d. interconnected by a groove 211 formed as a rectilinear channel extending perpendicular to the longitudinal axis χ · χ of the partition 20. Moreover, each plate 210a,

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210b, 210c, 210d provided with a central protrusion 212 with an elliptical plan view that is in almost the same plane as the protrusions 212 of the adjacent plates. The top portions 201, 202 of the partition 20 are provided with end plates 210a, 210d. that rise relative to the plates 210b. 210c located in the central portion 200 of the partition but partially remaining in the plane between the protrusions 212.

The underside (FIGS. 2 and 3) of the crossbar 20 is designed to include two longitudinally associated protrusions 220 that are visible therefrom and whose shape includes a recess 221 on each of them that has a U-shape in the vertical direction. (FIG. 10) and is open to the respective top portion 201, 202 of the partition 20 and provided with a conical bore 223 with an inlet. Each of the two protrusions 220 is positioned between the central portion 200 of the partition 20 and the respective upper portions 201,202. so that, in the assembled state on the corresponding section 1, each protrusion is located within the circumference defined by the frame 10, i.e. with a corresponding recess 221 adjacent and facing the corresponding side 103,104 of the frame 10. Thus, the pin 11 of the frame 10 on each side 101, 102 is inserted into the corresponding recess 221 and is secured therein by two opposing bulges 222 (Figs. 9, 10) downstream of the conical bore inlet 223.

On the side of the upper portions 201 and 202, again on the lower side (Fig. 2), at the foot of the protrusions 220, a seat 230 is obtained that is rectilinear, profiled according to a portion of the frame profile 10 perpendicular to the longitudinal axis xx of the bar 20. between the two continuous seats 230 substantially corresponds to the length of the axis between the two sides 101, 102 of the frame 10, so that when the crossmember 20 is mounted (FIG. 14), the upper edge of the frame 10 rests on each of the continuous seats 230.

Again on the lower side (Figs. 11-13), the central portion 200 is provided with a longitudinal groove 240 with two blind holes 241 for structural reinforcement of the partition 20.

The outer shape of the partition 20 comprises substantially rounded edges provided on the longer sides of a notch 250 to further reinforce the partition 20 and, in particular, to facilitate ventilation of the mattress from the bottom up with the grooves 211 when the partition walls 20 are arranged side by side, as in section 1 .

-10List of Reference Marks

I section frame partitions

101,102 opposite parallel sides

103,104 forehead

II coupling pins

200 central part

201,202 upper part

203 edge

210a, 210b, 210c, 210d plates

211

212

220

221

222

223

230

240

241

250 grooves central projection protrusions recesses opposed bulges conical bore with insertion inlet continuous seat longitudinal groove blind holes notches

Claims (10)

PATENT CLAIMS A crossbeam (20) for a bed base surface, characterized in that it is a monolithic body of thermoplastic material, with a shaped upper side provided with projections and a lower side with projections (220) with recesses (221) near two faces (201); (202) of the partition (20), each protrusion (220) being provided with a recess (221) for connection to the bed base frame frame (10), and wherein at the bottom between the edge (203) of each of the two faces (201,202) 20) and a seat (230) is formed by the nearest respective protrusion (220). A method of manufacturing a partition (20) according to claim 1, characterized in that it is carried out by blow molding of the thermoplastic material. Bed base for hospital beds with at least one partition (20) according to claims 1 and 2, characterized in that the bed base is articulated, consisting of a set of sections (1) with respective hinges, each section being with a frame (10), on which one or more parallel and spaced apart bars (20) are transversely mounted and fixed so that they at least cover the area defined by the circumference of the frame (10). A bed base (20) according to the preceding claims, characterized in that it is composed of one central part (200) and two upper parts (201,202), the size of the wall (20) being with respect to its longitudinal axis (200). xx) such that its length is greater than its width and greater than the axis length between the parallel sides (101, 102) of the frame (10) of the section (1), so that the upper portions (201, 202) of the partition (20) project outwards and beyond (101, 102) of the frame (10). A bed base (20) according to the preceding claims, characterized in that the underside of the wall (20) is shaped with distinct protrusions (220), each with a recess (221) that is open towards the respective upper part ( 201,202) a partition (20) and a conical bore (223) with an inlet port; wherein each protrusion (220) is located between the central portion (200) of the partition (20) and the respective upper portion (201,202), so that in the assembled state into the section (1) each protrusion (220) is located within the perimeter Defined by the frame (10) with a corresponding recess (221) facing and abutting the respective face (103,104) of the frame (10). A bed base (20) according to the preceding claims, characterized in that the upper side of each partition (20) is formed with protrusions, comprising at least two adjacent plates (210a, 210b, 210c, 210d) connected to one another via a trough. (211) formed as a straight channel perpendicular to the longitudinal axis (xx) of the crossbar (20); the upper portions (201,202) of the partition (20) have end plates (210a, 21d) that slightly lift upwards from the plates (210b, 210c) which are housed in the central part (200) of the partition. A bed base (20) according to the preceding claims, characterized in that the central part (200) comprises a longitudinal groove (240) with two blind holes (241) for structural reinforcement of the wall (20). The articulated bed surface with a crossbar (20) according to the preceding claims, characterized in that on two opposite parallel sides (101,102) of the quadrilateral frame (10), the faces (103,104) facing inwards the area defined by the frame (10) are perpendicular pins (11) which are arranged equally spaced and symmetrical to each other and are inserted into the recesses (221) of the crossbar (20). The articulated bed surface with a crossbar 20 according to the preceding claims, characterized in that the pivot (11) of the frame (10) on each side (101, 102) inserted into the corresponding recess (221) is retained therein by two opposing bulges (222). ) behind the conical bore (223). A partitioned support surface with a crossbar (20) according to the preceding claims, characterized in that a continuous seat (230) is formed on the side of the upper portions (201,202) at the bottom. a portion of the frame profile (10) and perpendicular to the longitudinal axis (xx) of the bar (20), and wherein the axis length between two continuous seats (230) substantially corresponds to the axis length between two sides (101,102) of the frame (10), (20) an assembled, upper edge of the frame (10) extends along each continuous seat.