CN1882302A

CN1882302A - Hospital or care bed

Info

Publication number: CN1882302A
Application number: CNA2004800340116A
Authority: CN
Inventors: A·里克加德
Original assignee: Linak AS
Current assignee: Linak AS
Priority date: 2003-11-18
Filing date: 2004-11-18
Publication date: 2006-12-20
Anticipated expiration: 2024-11-18
Also published as: CN1882302B; WO2005048904A1; EP1686943A1

Abstract

A hospital or care bed comprising a wheeled underframe and an upper frame for a mattress, where a lifting column is provided below the bed at each end on the vertical longitudinal centre plane thereof, said lifting column having respective ends connected with the underframe and with the upper frame, respectively, so as to allow adjustment of the height of the frame by activation of the drive unit (11) of the lifting columns. The lifting column comprises four members (1-4), of which at least three successive members (1-3; 2-4) are of the same or essentially the same length, and the fourth member (4; 1) is at least just as long. When standard pipes of circular cross-section and with sleeve-shaped spacers (10) to determine the overlap between the individual members are used, it is possible to achieve a column having great stability, while keeping the costs low.

Description

Sick bed or nursing bed

The present invention relates to the sick bed or the nursing bed of following type, the upper frame that it comprises the underframe of dress wheel and is used for mattress, and wherein in the vertical longitudinal median plane of described bed, be in the lifting post with a plurality of mutual extensible members is set under the bed at every end, described lifting post has respectively and underframe and the respective end that is connected with upper frame, so that allow the adjusting of the height of upper frame by the actuating that is arranged on the driver element that promotes post inside, and wherein said parts are provided with the interior sliding bearing of the inner part that is used for subsequently at top end, and are provided with the outer sliding bearing of the external part that is used for the front at lower end.

Traditionally, the altitude mixture control of sick bed is based on the scissors member principle by linear actuator drives, and this linear actuators is selectively in conjunction with longitudinal axis.By way of example, the EP0488552 A1 to HuntleighTechnology plc. carries out reference.Another program is the lifting post at each place, angle as describing in the US6505365 of Hill-RomInc.Two schemes all have good stable; Shortcoming is the labyrinth with the general constructive interference of bed.

As simplifying the part effort that the whole bed structure also reduces manufacturing cost thus, structure and the design with respect to underframe and upper frame simultaneously has wider selection, and the bed type has developed into only has two lifting posts that are arranged at every end place of its longitudinal median plane under the bed.Yet this produces bigger demand on the stability of post, particularly in the horizontal.A kind of example of this bed is for example at Vaut-Sagel GmbH ﹠amp; Co. shown in Fig. 6 of DE19604549.Yet this produces bigger demand on the stability of post, particularly in the horizontal.Relevant rod structure is complicated and make expensive.The another kind of example of this post is known from the WO01/74198 of Linak A/S, but this is also complicated and manufacturing is expensive.

When described post is arranged on bed and down is between underframe and the upper frame, need the bottom setting height(from bottom) simultaneously, it contrasts with a maximum/minimum constructive height formation that bed must can be born.Maximum height must be very big so that allow the office worker to work so that stance is convenient at bedside, and minimum constructive height must be very low convenient so that allow patient to leave and enter bed.

The object of the present invention is to provide a kind of sick bed or nursing bed of more simple properties, it also satisfies stable needs.

This obtains by the bed that is constructed as follows according to the present invention: this bed accessory has the lifting post that has four parts, and wherein at least three successive parts are equal length or substantially the same length, and the 4th parts are at least just in time equally long.Here, can provide on the structure bed simple, that stability is very big, if particularly all the more so during the standard pipe of use circular cross section.The unrestricted installation of intermediate member also helps the simplification of post.By circular cross section, whether intermediate member should also have less importance around their longitudinal axis rotation in the extension/retraction process.In addition, the consistent function that stretches of production part is not conclusive.By using to sleeve that seam plastic tube form is arranged can obtain big overlappingly with plain mode, above-mentioned plastic tube loosely inwardly is applied on the described parts.Use with linear actuators of three parts also is a driver element cheaply.Approximately the haul distance of 300mm to 500mm, preferred 350mm to 450mm also is provided at the reasonable relation between the maximum height of installation dimension and post, and the while provides the easy to handle product aspect production.

In conjunction with describing below of the embodiment of the invention further feature of the present invention will be described with reference to accompanying drawing, wherein:

Fig. 1 illustrates the longitudinal cross-section of seeing the lifting post that is in retracted state from sidepiece,

Fig. 2 illustrates the longitudinal cross-section of seeing the lifting post that is in the maximum extension state from the rear portion,

Fig. 3 illustrates the decomposition view that promotes post, and

Fig. 4 illustrates the decomposition view of the slightly different structure that promotes post.

It will be appreciated that from accompanying drawing described post comprises four parts of telescopic arrangement each other, that is, and external part 1, two

intermediate members

2,3 and inner parts 4.The lower end of two

intermediate members

2,3 and inner part 4 are provided with the outer ring sliding bearing 5 that engages with the inboard of the parts of front.Sliding bearing 6 is installed in the upper end of external part 1 and two

intermediate members

2,3 in the annular, and engages with the outside with back part.Two groups of sliding bearings are fastening by pin 7, and described pin is with hole 8 snap-lock (snap lock) in described parts and be connected.In order to compensate the play in post that occurs as described parts measurement tolerance result, calibrator unit in the zone at sliding bearing 5,6 places.Carry out this calibration at the sliding bearing place by the local deformation of described parts, up to it with till the deviation of expectation and subsequently the part bonding, as described in the WO03/047389 of Linak A/S.This distortion is inside and outside at lower slide bearings 5 places at top sliding bearing 6 places.For this purpose, annular sliding bearing 5,6 cracks, and makes its circumference consistent with parts subsequently.In terminal, the top that ring 9 is applied to external part 1 and two

intermediate members

2,3, described ring has outer neck ring, and described outer neck ring is used to the hole of the connecting pin that hides the distortion, be used for sliding bearing and the top edge of sliding bearing 6.This produces the impermeability that more dustproof is surperficial and the raising dampness enters.

In order to obtain big stability, each parts have big overlapping in extended position, and this is by determining for the separator 10 that seam plastic tube form being arranged that is inserted on the parts 2-4.When inner part for example 4 stretches, separator 10 will be captured between the lower limb 6a of the top edge 5a of its sliding bearing and the top sliding bearing in intermediate member 3 subsequently.Separator has thickness, and this thickness allows them to be contained in the space between each parts certainly, and fastening never in any form.

Parts 1-4 makes by shortening cylindrical standard pipe expediently.Outer and

inner parts

1,4 are when being fixed to when bed last fastened and opposing around the rotation of their longitudinal axis.On the contrary, be not fixed opposing rotation but can be of two

intermediate members

2,3 around their longitudinal axis rotation.On the other hand, in described structure, there is not member directly to cause their rotations.Because cross section is circular, the longitudinal axis rotation whether described parts center on them also will be unessential.

In order to cause moving of lifting post, use the linear actuators 11 of three parts, it has the solid shafting of introducing in the hollow axle 13 12, and this hollow axle 13 combines with the spindle nut of locating at the top of uprise 14.This actuator is driven by low pressure (general 24-28V) DC motor 15.Driver between motor and solid shafting is a worm gear.This actuator inserts in post, and it is fixed between the roof of the base plate 1a of external part 1 and motor shell 16 herein.This actuator is fixed among the base plate 1a, thereby uprise 14 is screwed on the described base plate 1a with screw thread securely by two screws.At the upper end of actuator, plate shape pad 18 inwardly is inserted on the annular protrusion 17 just in time under driver, and described pad is placed on the horizontal plate 19, and this horizontal plate 19 is welded to the top of inner part 4.Motor shell is threadably fastened on this plate by twisting, and the upside of motor shell has two pins that stretch in two holes 20 in inside, described hole is used for described fastening purpose and is in the upper end of actuator, and the upper end of this actuator is planar generally and rests on the roof of motor shell 16.

The upper frame of described bed directly be parked on the plane upper side of housing and by the lining 21 that inserts at four jiaos of places of motor shell by screw or bolted to plate 19.Promote post and be fastened on the underframe by the lower ends downward of external part 1 is inserted in the bowl-type support, above-mentioned bowl-type support can be clamped around described parts.

When actuator starts, inner part 4 stretches ideally till the separator on it 10 is trapped between the sliding bearing on its sliding bearing and the top at subsequently intermediate member 3, pulling forward thus, and proceed to all three parts and all be stretched over till their whole length.

Fig. 4 illustrates the embodiment of the lifting post with different sliding bearing notions in the accompanying drawing.Sliding bearing 23,24 is fastening by anchor clamps 25, and above-mentioned anchor clamps 25 are fastened in the groove 26 in the tube wall.Anchor clamps 25 be bonded in the sliding bearing 23,24 cannelure 23a, 24a and fastening thus they.Do not carry out as referred calibration, on the contrary, corresponding sliding bearing 23,24 provides with different-thickness, and selects to have the sliding bearing that relevantly is assemblied in the thickness in the gap.In order to seal, diaphragm of rubber 26 here is arranged between plate 19 and the motor shell 16.This diaphragm of rubber has integration little filter bag 26 within it, and this little filter bag 26 is pulled inward moving on the shaft portion of driver element.Label 27 is the common air bleeding valves that use in electronic housing equipment, so that prevent over-drastic pressure.For integrity, should be understood that 28 is printed circuit board (PCB)s, it has and is installed in the socket that is connected with gate 29 in the motor shell, and 30 is plugs from the control chamber with control and power supply.

Promote post and have the installation dimension of about 350mm, and actuator 11 has the haul distance of about 400mm, the height that promotes post in full extended position is approximately 750mm.Each parts have for inner part approximately 270mm and for external part the length between the 240mm.Lap between each parts is about 110mm.The diameter of external part is that the diameter of about 110mm and inner part is about 80mm.

As previously mentioned, actuator has three parts 12-14, and has four extensible member 1-4, and it provides bigger lap and provides high stability with the optional calibration that is used for measurement tolerance.Because cross section is circular simultaneously, stability is identical on all directions.Because simple in structure and can be based on standard pipe, it is lower that manufacturing cost can keep.

Claims

1. the sick bed of a following type or nursing bed, the upper frame that it comprises the underframe of dress wheel and is used for mattress, and wherein in the vertical longitudinal median plane of described bed, be in the lifting post with a plurality of mutual extensible members is set under the bed at every end, described lifting post has respectively and underframe and the respective end that is connected with upper frame, so that allow adjusting to the upper frame height by the actuating that is arranged on the driver element that promotes post inside, and wherein said parts are provided with the interior sliding bearing (6) of the inner part that is used for subsequently at top end, and be provided with the outer sliding bearing (5) of the external part that is used for the front at lower end, it is characterized in that, described lifting post comprises four parts (1-4), wherein at least three successive parts (1-3; 2-4) have equal length or substantially the same length, and the 4th parts (4; 1) at least just in time equally long.

2. bed as claimed in claim 1 is characterized in that described parts have circular cross section.

3. bed as claimed in claim 2 is characterized in that described parts are made by standard pipe.

4. bed as claimed in claim 1 is characterized in that described extensible member (2-4) is provided with the separator (10) that is used for determining the lap between parts.

5. bed as claimed in claim 4 is characterized in that described separator (10) is cooperated with the sliding bearing (5,6) on parts.

6. bed as claimed in claim 4 is characterized in that, described separator (10) is formed by the seam plastic tube that has with the spatial thickness that is equal to or less than between two continuous members.

7. bed as claimed in claim 4 is characterized in that, described separator (10) be not used in fastening they with the device that move of opposing on described parts (2-4).

8. bed as claimed in claim 2 is characterized in that described two intermediate members (2,3) can move freely in the vertical between corresponding sliding bearing, and is not used in the device that prevents around the longitudinal axis rotation.

9. bed as claimed in claim 1 is characterized in that described parts (1-4) have 200mm to 350mm, and preferred 250mm is to the length of 300mm.

10. bed as claimed in claim 1 is characterized in that, the length of described stroke be about 300mm to 500mm, preferably approximately 350mm is to 450mm.