WO2016206668A1

WO2016206668A1 - Hospital bed and/or care bed, and a lateral rail for the bed

Info

Publication number: WO2016206668A1
Application number: PCT/DE2015/100257
Authority: WO
Inventors: Martin Bansmann; Jurij Mylnikow
Original assignee: Joh. Stiegelmeyer Gmbh & Co. Kg
Priority date: 2015-06-23
Filing date: 2015-06-23
Publication date: 2016-12-29
Also published as: EP3313348B1; PL3313348T3; CN107809991A; CN107809991B; DE112015006652A5; EP3313348A1

Abstract

The invention relates to a hospital bed and/or care bed (1) with a lateral rail. The lateral rail comprises an outer post (30) and a central post (70), each of which has a lower rotational point (32, 72) for pivotally mounting the posts on the frame of the bed (1), on a retaining element secured to the bed, or on a guide (80) secured to the bed, and the lateral rail further comprises at least two longitudinal braces (40, 50, 60). The first ends of each of the braces are pivotally mounted on the outer post (30), and a brace guide (45, 150, 160) is provided for the second ends in order to fix the position and orientation of the second ends of the longitudinal braces (40, 50, 60) relative to the central post (70) such that the lateral rail can be brought into an upright position from a folded position by pivoting the two posts (30, 70) about the lower rotational points (32, 72).

Description

Hospital and / or nursing bed and a side rail for it

The invention relates to a hospital and / or nursing bed with a side rail and a side rail for attachment to a corresponding bed.

Side rails on beds are well known. The function of the side rails is to protect a person in bed from, for example, when rolling out of bed to roll, thereby falling to the floor and possibly injured. Depending on the specific conditions of use, it may be required that the side rails cover the entire longitudinal side of the bed or only partial areas. A side rail may be provided on both longitudinal sides of the bed, with only a one-sided side rail being considered below. On the other long side, a structurally identical, another or no side rails can be provided.

There are different requirements for side rails. First, the side rails as simple as possible from the folded position in which the bed longitudinal side is released, can be changed to the closed position. Next, the side rails in the folded position should not be perceived disturbing and best completely invisible. In addition, the side rails should be easy and inexpensive to produce with a sufficiently high stability. In addition, the side rails should be set up to be initially brought into an upright position, in which a partial cover of the bed longitudinal side is made. Furthermore, it should preferably be possible to vary the cover of the bed longitudinal side at the option of the user or the caregiver. Documents US 3 055 020 A, DE 83 31 386 U1, FR 2 976 791 A1 show that each have a parallelogram. Documents FR 2 815 527 A1, US 3 220 024 A and US 6 789 280 B1 each comprise extendible side rail extensions.

The object of the present invention is to provide a hospital and / or nursing bed and side rails therefor, which solves the above requirements improved.

This object is achieved with the bed and the side rails according to the independent claims. Advantageous developments emerge from the subclaims.

A hospital and / or nursing bed may have a side rail, the side rail comprising an outer post and a center post, each having a lower pivot point have, for pivotally mounting the posts either on the upper frame of the bed or on a bed-mounted support member or on a guide attached to the bed. The side rail further comprises at least two longitudinal struts, which are each pivotally mounted with their first ends to the outer post and for their second ends a strut guide is provided, for determining the position and orientation of the second ends of the longitudinal struts relative to the center post, so that Side rails can be brought about a pivoting of the two posts to the lower pivot points of a folded in an erect position. In the case of the upper longitudinal strut, the strut guide is preferably a pivot bearing, and in the case of one or more struts, the strut guide is preferably a sliding guide from the longitudinal struts to the extension struts explained below. Due to this embodiment, the side rails can be very easily folded or closed as a four-link coupling gear, since only a corresponding pivoting movement must be performed. Opening the side rail corresponds to folding the side rail. The wording that the bearings are provided at the ends of the struts does not necessarily mean that the struts can not protrude beyond the position of the support, but rather serves to indicate the respective orientation of the struts. For example, as with the upper strut described below, a hand area may be provided outside of the bearings.

In particular, immediately adjacent to the center post is an extension post of the side rail, which is pivotable upon movement of the side rail from the folded to the upright position with the center post and which is displaceable relative to the center post in the upright position of the side rail. In this case, the displacement direction is preferably in the axial direction of the longitudinal struts and this corresponds in particular to the longitudinal direction of the side rail. It has been found that this two-part construction is preferred by the users, since the basic structure of the raised position is quickly achievable, which is then also easily adaptable over the extension to the desired width of the side rail over the bed longitudinal side.

Further preferably, extension struts are pivotably coupled to the extension post and the extension struts are slidable relative to the mullion via a guide, in particular a slide guide, to provide a siderail function between the mullion and the extension post in the condition that the extension post is remote from the mullion cause. The extension of the side rail is thus spanned by simply moving the extension post. In particular, at least one longitudinal strut is associated with an extension strut, and thereby the at least one extension struts assumes the function of the strut guide of the associated longitudinal strut relative to the center post. Thus, initially no pivot bearing is needed at the mid-pinned end of this longitudinal struts and this bearing task is met by the extension struts.

Furthermore, in particular a longitudinal strut may be associated with an extension strut and in particular each elongate strut may be assigned an extension strut. In this case, the longitudinal strut or longitudinal struts surrounds the respective extension strut at least partially and / or the extension strut or extension struts the respective longitudinal strut at least partially. Thus, the stability of the resulting package of struts is increased and the side rails in the upright position does not look visually bulky, since the inner struts are not visible.

In particular, the side rail comprises at least one attachment, in particular an extension strut, which is mounted relative to the center post and arranged to align via a sliding guide the second end of one of the longitudinal struts relative to the center post. Due to the bearing of the extension strut above the mullion a good guidance and solid construction is achieved.

Further, in the folded state of the side rail, the longitudinal struts and the posts may be aligned substantially parallel to the bed frame plane. This means the respective basic profile of these parts and attachments such as extensions remain unaffected. The term "essentially" encompasses a deviation of +/- 3 ° and in particular +/- 1, 5 °, thereby achieving a space-saving construction Person who gets up from bed, does not come into contact with the side rail.

Further, in particular in the folded position of the side rail on the uppermost longitudinal strut and / or the uppermost extension strut a gripping area is provided which can be gripped at least partially by the user. Alternatively, this feature can be formulated in particular such that in the folded position of the side rail at the bottom of the overhead longitudinal strut (and / or extension strut) a contiguous area of at least 10 cm ^{2 is} provided, which has a free height in the vertical direction of at least 1 , 5 cm, so that in this volume four fingers (o- the fingertips) the longitudinal strut lifting, so in the vertical direction, can grab. So the collapsed side rails is not a single compact block, but the user can grab the handle rather easily and bring by pivoting in the upright position.

In addition, the extension post can be pivoted when pivoting the side rail from the folded in the upright position about a first axis of rotation and the center post thereby be pivoted about a second axis of rotation and pivot axes are largely identical. For both axes of rotation a rotary or pivot bearing is provided. If the equality of the axes were not, then canting and blocking of the side lattice could take place.

Furthermore, the extension struts can be telescopic and thereby the span of the side rail extension can be increased.

Locking means are preferably provided to hold the side rails in its latching position and / or in its extended position in a latching position, wherein in particular no connection means are provided from the side rails to the head-side and / or foot-side main. Thus, the side rail can be used independently of a special head and / or foot-end main. At the head no attachments or guides are needed, which would look ugly in the condition of the folded side rail. And since the locking function takes place within the side rail in the erected position, ie between the moving parts with each other or a post and the bed frame or the guide of the side rail, the side rail has a high stability.

Furthermore, a corresponding side rail is provided.

Hereinafter, preferred embodiments of the invention will be explained with reference to FIGS. Show it:

1 shows a bed in a perspective view with a side rail in its folded position,

2 shows a section of the bed according to FIG. 1, wherein the side rail is in its erected position, FIG.

FIG. 3 shows the bed with the side rail in its extended position. FIG. 4 shows a detail of the side rail in its folded position according to FIG. 1, in which the screen 22 is removed, FIG.

5 is a perspective view of the side rail in the transition from the folded to the erect position,

6 shows a detail of the latching of the center post to the upper longitudinal strut,

7 shows a detail of the side rail in a slightly extended position of the side rail,

Fig. 8 shows an alternative embodiment of the side rail with telescopically extended extension struts and

Fig. 9 is a view of the storage of the center post from below.

Fig. 1 shows a hospital and / or nursing bed, which comprises four feet 12, which are fixed to a lower frame 10 (Figure 3). The lower frame is a support for the upper frame. This can be raised and lowered via not shown drives and aligned in the angular position. The upper frame serves as a support for the head-side main 5 and the fußseiti- ge main 6 and also for the lower leg rest 7, the thigh rest 8 and the backrest 9. On the latter is the mattress (not shown) and these backrests are not shown Drives adjustable in their position. Parts of a side rail are visible on the left longitudinal side (shown at the front in Figure 1), namely an outer post cover 33 of an outer post 30 and a longitudinal strut cover 43 of an upper longitudinal strut 40. The side rail itself is not visible because it is in its folded position and is covered by a diaphragm 22. In the folded position, the top edge is a few centimeters, e.g. maximum 5 cm, above the backs 7, 8 and 9 in their lowered positions. When the mattress is placed on these backrests, the top edges of the covers 43 and 33 are clear, e.g. at least 2 cm, below the top of the mattress. Thus a person can sit comfortably on the side of the bed, e.g. when leaving the bed and lying down and even then comes with the thighs in a disturbing contact with the covers when the mattress presses through the weight of the person.

Fig. 2 shows the side rails in its erected position. In this position, the bed side is partially covered by the side rails, so that a person is already largely protected against falling out of bed. In this case, the head end protection is more important because it is more dangerous to injury if a person with the head or upper body first falls to the other way round. The post 70 is referred to as a center post. But he is preferred not centered along the side of the bed, but closer to the head of the bed at 60:40. Since a person in bed is usually with the buttocks in the middle of the bed (in the longitudinal direction) and turns when boarding around the buttocks as a fulcrum, an exactly centered and upright center post 70 would hinder entry.

In front of the front longitudinal member of the upper bed frame (not shown) is a guide 20. Alternatively, their function can also be fulfilled by a longitudinal member of the bed frame. The guide 20 is for storage of the center post 70 and the outer post 30, which is adjacent to the head corner of the bed 1. For the pivot points 72 and 32 are provided as a pivot bearing over which the posts can be pivoted. The respective other ends of the posts 30 and 70 include bearing points 44 and 45, via which an upper longitudinal strut 40 is rotatably mounted to the posts. In this way, there is a four-link coupling gear and since the lengths of the opposing elements are equal, so the distances between the bearing points are equal, results in a parallelogram. This is pivotable between the end positions shown in FIG. 1 and FIG. 2 and the upper longitudinal strut 40 is always parallel to the upper bed frame.

In addition, the side rail is extendable from the erected position to an extended position shown in FIG. In the extension position, an extension post 170, which in the states according to FIGS. 1 and 2 was directly adjacent to the center post 70, is displaced therefrom by a displacement movement in the direction of the foot end. In order to guide this sliding movement, a carriage 179 is used, on which the extension post in the bearing 172 is rotatably mounted. The carriage 179 is thus displaceable along the guide 20 in the bed longitudinal direction. In order not to interfere with the fulcrum 72, the carriage has a corresponding slot. Through a mechanism described in detail below are the pivot points 172 (see FIG. 9) of the extension post 170 and the center post in the state that the extension post is applied directly to the center post 70, collinear. This condition is given in the folded and erected positions and their intermediate stages.

At the upper end of the extension post 170, an extension strut 140 is pivotally mounted in a pivot bearing 145. The extension strut is completely received in the erected position in a cavity of the upper longitudinal strut 40 and there axially displaceable. In order for the side rail to be erectable, the pivot bearing 145 is collinear with the already described bearing 45 of the center post 40 with the upper longitudinal strut 40. FIG. 6 is a schematic view from the bed interior to the transition region from the center post 70 to the upper longitudinal strut 40 the side rail extension is slightly extended. Inside the upper longitudinal strut 40, a U-profile 79 is mounted, which is fixedly connected to the center post 70. The flanks of the "U" of the U-profile 79 are rotatably mounted on the longitudinal strut 40 at the pivot points 45. The extension strut 140 is mounted within the flanks of the U-profile 79. In turn, it is supported via the bearing point 145 (shown by dashed lines) a carrier profile 179 is rotatably mounted, wherein the support profile 179 is fixedly connected to the extension post 170. Since the upper longitudinal strut 40 is opened from the bearing point 45, in the direction of the foot end of the bed downwards, the assembly of the extension elements relative to the longitudinal strut 40th Since the bearing point 145 of the carrier profile 179 has an offset to the extension post 170 in the direction of the bed head, the carrier profile 179 can be pushed from the position shown in Fig. 6 so far into the longitudinal strut 40 that the bearing points 45 and 145 collinear In this state, which corresponds to the erected position of the side rail, the b move the described parallelogram transmission of the side rail.

Below the upper longitudinal strut 40 and the upper extension strut 140 further struts are arranged, namely the longitudinal struts 50 and 60 and the extension struts 150 and 160. In Fig. 2, only the extension struts 150 and 160 are visible because the longitudinal struts 50 and 60 are within this Extension struts 150 and 160 are located and are axially displaceable in these. The longitudinal struts 50 and 60 are thus only in the extension position, as shown in FIG. 3, visible. At pivot points 54 and 64, these longitudinal struts are rotatably mounted on the outer post 30. When the side rail is in an extended position, it is not pivotable to the folded position as the extension bars 150 and 160 are in slideways of the center post 70 which prevent pivotal movement. In order to still be able to pivot the side rail in the folded position, in the connection of the extension struts 150 and 160 to the extension post 170 pivot points 155 and 165 are provided. These fulcrums are disposed on extensions 158 and 168 of the extension post in the direction of the bed head respectively at the vertical height of the longitudinal struts 50 and 60 and have a length sufficient to engage the mullion 70 upon engagement of the extension post 170. The bearing points 155 and 165 are then within the parallelogram of the coupling mechanism described. This will allow light, that in the pivoting rotation of the side rail not only the parallelogram described above is moved, but also the packages of the extension strut 150 with the longitudinal strut 50 and the extension strut 160 with the longitudinal strut 60 are pivoted in pairs while the bearing points 54 and 155 , or 64 and 165 are stored. In this case, the individual longitudinal struts 40, 50 and 60 move via a parallel offset movement from the erected to the folded position.

Fig. 4 shows the packing of the elements of the side rail in the folded position. In this case, all struts and all posts are aligned parallel to each other with respect to their main orientation. This alignment is achieved by the extensions provided on the posts. Thus, the extensions 158 and 168 already described are unequal in length. Concretely, the extension 158 is longer by the height of an extension strut 160 than the adjacent extension 168 of the underlying strut 160. Correspondingly, extensions 78 and 178 are provided on the center post 70 and the extension post 170. Since these extensions in view of the vertical direction (see FIG. 2) are not carried out at the end of the posts, but lying a few centimeters lower, results in the distance between the extensions 78 (or 178) and the longitudinal strut 40 (or 140 ) a free space. This can be used to allow a user to insert the hand, or at least the fingers (tips), into it to grasp from below a free end of the upper longitudinal strut 40 and the upper extension strut 140, respectively. First, in the erected position of the side rail, the user can hold on to this handle while standing up. When the side rail of Fig. 1 is in the folded position, the user or a caregiver can place the side rail by grasping this handle 49 and 149 in the raised position.

Figures 4 and 2 show a damping member 39 which, when moved to the folded position, compresses and can absorb impact forces which could occur upon collapse of the side rail in the folded position. In addition, a compression spring element can be provided in the damping element in order to facilitate the user lifting the side rail from the folded position.

Fig. 5 shows the mobility of the individual components in the movement from the folded position of the side rail to the upright position, which is defined by the uprights 30 and 70 already swung up into vertical alignment, and the side rail extension at this time not yet undressed. In order to keep the side rails in this position, a lock is provided, which is shown in FIG. 6 as a lever 47 is executed. One end of the lever is formed as a bearing point and is received within the upper longitudinal strut and rotatably mounted on it. An actuator extends down into the free handle area and at the opposite end of the lever 47, a latch releasably engages a corresponding indicia which, during its engagement, prevents the side rail from being pivoted to the folded position. Unillustrated stop means of the guide 20 to the outer post 30 in the vicinity of the pivot point 32 ensure that the side rails can be pivoted only by the 0 ° -Winkellage in the 90 ° -Winkellage the upright position and not beyond. Instead of the actuator as a pivotable lever 47, the said locking function can also be realized by a displaceable latch (not shown) which is axially displaceable within the upper longitudinal strut and prevent pivoting of the side grille via the engagement in a corresponding groove of the U-profile 79 can.

In addition, a detent may be provided which holds the side rails in the maximum possible extension position and in which a pushing back into the erect position is not possible. This function can be realized by a push button which is located at one of the extension struts 150 or 160 a distance from the free end of the strut and presses in the unpressed state against the mullion and in the depressed state by a clearance in the mullion, serving as a sliding zone for the extension strut serves, can slide.

Fig. 7 shows the detail of FIG. 6 in a perspective view, while the bearings 165 and 155 in detail. The bearings are preferably plastic injection molded parts, which are inserted into the corresponding profiles (preferably aluminum) of the extension struts 150 and 160 and further inserted into the extensions 158 and 168 and permanently secured there. The apertures in the extension post center posts 70 are lined with a sliding plastic to ensure good sliding and to avoid scratches on the extension struts.

From the described structure, there are some advantages. First, the operation is greatly simplified. In many applications, only a side rail is needed that covers a part of the bed, preferably the upper half, as a result, in many cases, a falling of the person from the bed can be completely prevented. And the Aufrichtbewegung described is possible with a handle. Namely, when the side rail is in the folded position, the user (or caregiver) only needs to grip the handle 49 pivoting up and swing the latch described holds the side rails in the folded position. Conventionally known side rails were usually several handles needed. So had to be raised or plugged with a handle of the center post and then closed the side rails with a second movement.

Also, the constructive concept described allows the side rail to have a pleasing appearance when either folded or in the upright position, which are the two most common states. According to FIG. 1, the outer post cover 33 and the longitudinal strut cover 43 are particularly visible in the folded position. These covers can be provided with a padding or with an attractive surface, such as a wooden structure. The longitudinal strut cover 43 remains visible even in the erected position. Further, a corresponding viewing surface 173 (see FIG. 7) may also be provided on the extension post 170 which, in the erected position, together with the extension post, covers the corresponding outer surface of the center post 70.

In addition, there is a cost advantage in the production costs. Conventionally known side rails, which have made it possible to provide both partial and full coverage of the bed side, have often been constructed using two independent side rails, each with two posts. This resulted in a total of four posts. In the described embodiment, only three posts, namely the outer post, the center post and the extension post are necessary. In addition, the side rail extension can be extended to different lengths so that the user can set the extension function according to his interests.

As mentioned above, the central post 70 is preferably not centrally located, but offset by a distance such as 30 cm in the direction of the head of the bed. Since the length of the extension struts can not be greater than the distance from the outer post 30 and the center post 70 in the erected position, the side rail can not cover the entire bed length even in its extended position, but the position according to FIG. 3 represents the maximum possible cover, provided that the one-piece extension struts described so far are used. At the foot of the bed is an area not protected by the side rails. This area may be advantageous because it is small enough that a person does not fall out of bed. On the other hand it allows her to leave the bed even with an extended side rail. On the other hand, there are also application areas in which a side rail covering the longitudinal side completely is desired. In this case, the extension struts can have telescopic elements, as shown in FIG. 8. Fig. 8 shows an alternative embodiment of the extension struts. These are now telescopically designed in two parts, with two interlocking profiles. This increases the maximum length of the side rail extension and the long side of the bed can be completely covered. Each intersecting undercuts cause from one telescopic element to the next that reaches a maximum extension length and not exceeded

becomes. As the side rail is retracted from the extended position to the erected position, the extension strut 150 'or 160' could butt against the clearance in the center post 70. To avoid this, the extension struts have at their bottom a slot in which an inwardly directed projection of the franking of the center post protrudes and aligns the extension struts both in lateral and in height direction.

The orientation of the bearing axes of the lower bearing of the center post 70 and the extension post 170 is shown in Fig. 9. For this purpose, an angle profile 79 is arranged on the guide 20, in particular welded. It serves to receive the fastening bolt (not shown in FIG. 9) for supporting the center post. This bearing is spaced from the guide 20 and the carriage 179. On the carriage 179 in turn a further angle section 171 is arranged, which is pivotally mounted to the carriage 179. The bolt used for this purpose is not shown. This angle profile 171 is permanently connected to the displacement post 170, in particular welded. This design ensures that the bearing shafts 72 and 172 are collinear, so that the center post 70 can move together with the extension post 170.

Claims

Claims:

A hospital and / or nursing bed (1) having a side rail, the side rail including an outer post (30) and a center post (70) each having a lower pivot point (32, 72) for pivotably supporting the posts either at the Frame of the bed (1) or on a holding element attached to the bed or on a bed-mounted guide (80), and the side rails further comprises at least one, preferably at least two longitudinal struts (40, 50, 60), each with their first ends on the outer post (30) are pivotally mounted and for their second ends a strut guide (150,160) is provided for determining the position and orientation of the second ends of the longitudinal struts (40, 50, 60) relative to the center post (70), wherein the Strut guide at least one extension strut (150, 160), so that the side rails on a pivoting of the two posts (30, 70) about the lower pivot points (32, 72) of a folded in an upright Po can be brought, characterized in that

the at least one extension strut (150, 160) is telescopically mounted relative to a longitudinal strut (50, 60) and the side rail comprises an extension post (170), the extension post (170) being connected to the extension strut (150, 160) via a pivot (155, 165) ) connected is.

2. hospital and / or nursing bed according to claim 1, characterized in that the middle post (70) immediately adjacent to an extension post (170) of the side rail can be arranged, which in the movement of the side rail from the folded to the erected position with the center post ( 70) is pivotable and which is displaceable in the state of the erected position of the side rail relative to the center post (70).

3. hospital and / or nursing bed according to claim 2, characterized in that on the extension post (170) extension struts (140, 150, 160) are pivotally coupled and the extension struts (140, 150, 160) via a guide, in particular a sliding guide , are displaceable relative to the center post (70) to effect a side rail function between the center post (70) and the extension post (170) in the condition that the extension post (170) is remote from the center post (70).

Hospital and / or nursing bed according to claim 3, characterized in that at least one longitudinal strut (50, 60) is associated with an extension strut (150, 160) and thereby the at least one extension strut (150, 160) the function of the strut guide of the associated longitudinal strut relative to the center post (70).

Hospital and / or nursing bed according to claim 3 or 4, characterized in that at least one longitudinal strut (40, 50, 60) is associated with an extension strut (140, 150, 160) and in particular each longitudinal strut is associated with an extension strut and the longitudinal strut or longitudinal struts the respective extension strut at least partially surrounds and / or the extension strut or extension struts at least partially surrounds the respective longitudinal strut.

Hospital and / or nursing bed according to one of the preceding claims,

characterized in that the side rail comprises at least one attachment, in particular an extension strut (150, 160) mounted and arranged relative to the center post (70), via a sliding guide the second end of one of the longitudinal struts (50, 60) relative to to align with the center post (70).

Hospital and / or nursing bed according to one of the preceding claims,

characterized in that in the folded state of the side rail all the longitudinal struts (40, 50, 60) and all the posts (30, 70, 170) are aligned substantially parallel to the plane of the bed frame.

Hospital and / or nursing bed according to one of the preceding claims,

characterized in that in the folded position of the side rail on the overhead longitudinal strut (40) and / or the overhead extension strut (140), a handle portion (49, 149) is provided, which is at least partially umgreifbar by the user.

Hospital and / or nursing bed according to one of the preceding claims,

characterized in that the pivot post (70) is pivoted about a first axis of rotation (72) upon pivoting of the side rail from the folded to the erect position by means of a first bearing and the extension post (170) thereby is pivoted about a second axis of rotation (72) by means of a second bearing and both pivot axes (72) are substantially identical.

10. hospital and / or nursing bed according to one of claims 3 to 9, characterized in that the extension struts (140 ', 150', 160 ', 140 ", 150", 160 ") are telesko- pierbar.

1 1. hospital and / or nursing bed according to one of the preceding claims,

characterized in that latching means are provided to hold the side rails in its upright and / or in its extension position in a latching position, wherein in particular no connection means from the side rails to the head-side and or foot-side main (5,6) may be provided.

12 side rails for attachment to a hospital and / or nursing bed, wherein the side rails comprises an outer post (30) and a center post (70), each having a lower pivot point (32, 72) for pivotable mounting to a guide attachable to the bed (20), and the side rail further comprises at least one, preferably at least two longitudinal struts (40, 50, 60) which are each pivotally mounted with their first ends to the outer post (30) and for their second ends a strut guide (150, 160 ) for determining the position and orientation of the second ends relative to the center post (70),

such that the side rail can be brought from a folded into an erected position by pivoting the two posts (30, 70) about the lower pivot points, wherein the strut guide (150, 160) comprises at least one extension strut (150, 160) and characterized in that

the side rail has the features of the characterizing part of one of claims 1 to 11.