EP0738506A1 - Mobile patient support system - Google Patents

Abstract

The bed surface (18), by relative movement between the transport carriage (16) and the support column (10), is transferrable from the one to the other. On the bed surface at least two pin-shaped connecting components (24) are arranged, which can be inserted into complementary pin accommodations (26) on the support column and the transport carriage. On each connecting component at least two locking catches are pivotably located, and are adjustable between a locking position and a release position. During the transfer process the connecting components simultaneously engage in a column-side and a carriage-side pin accommodation (26,22). In each pin accommodation a securing recess is provided for receiving one of the locking catches in its locking position.

Description

The invention relates to a mobile patient support system, comprising a support surface, a support column for supporting the support surface and a transport trolley for transporting the storage surface, which can be transferred from the transport trolley and support column to the transport trolley and vice versa by a relative movement and on which at least two peg-shaped connecting elements are arranged are, which can be inserted into complementary pin receptacles on the support column or the trolley for connection to the same, with at least two locking pawls being pivotally mounted on each connecting element in such a way that they are adjustable between a locking position and a release position and during the transfer process at the same time in a column-side and engage a trolley receptacle on the carriage, furthermore having a latching recess in each trunnion receptacle for receiving one of the locking pawls in its locking position and one of the respective ils other locking pawl associated control surface are formed, which transfers this locking pawl into its release position when the connecting element is inserted, and wherein the locking pawls have two sections, one of which engages in the latching recess of a peg receptacle of the support column or of the transport carriage and the other for planting on the control surface of the pin receptacle of the other part (trolley, support column) is determined.

Such a mobile patient support system is known from EP 0 457 246.

The object of the invention is to further increase the functional safety of the known mobile patient support system.

This object is achieved in that the section of a locking pawl intended for engagement in the latching recess of the respective pin receptacle has two latching steps with a different distance from the jack pivot axis, that a control cam is formed on the control surface of each pin receptacle and that on which to bear against Control surface of the pin receptacle certain section of the locking pawls is designed to cooperate with the control cam and the control surface certain control curve, the location and shape of the respective control cam and the respective control curve are determined so that with a relative movement of the connecting elements relative to both pin receptacles in their transfer position from the support column and the trolley, the pawls are pivoted by a partial amount of their maximum pivoting angle and into the respective notch with the catch level closer to the catch pivot axis engage while the detent step further away from the pawl pivot axis engages in the detent recess in the peg receptacle of the part taking over the bearing surface (trolley, support column) when the peg receptacles of the support column and transport trolley move.

When the peg receptacles of the support column and transport trolley are in the transfer position, both pawls on both connecting elements are in their release position. With the solution according to the invention it is prevented that in this situation the patient support surface can be removed or unintentionally detached from the support column and trolley. At the moment when an attempt is made to raise the bearing surface so that the connecting elements on the patient bearing surface lie relative to the peg receptacles on the support column and transport carriage which remain in their transfer position, the locking pawls become so through the interaction of the control cams with the control cams formed on the locking pawls controlled that they are partially pivoted and engage with their respective latching step closer to the pawl pivot axis in the latching recess. The same happens if, for example, the patient support surface tilts. In this state too, at least one of the locking pawls engages with its latching step closer to the pawl pivot axis, so that the patient support surface cannot unintentionally detach from the supporting part.

Figur 1a bis g

schematische Skizzen zur Erläuterung der Funktionsweise des mobilen Patientenlagersystems,

Figur 2

eine teilweise schematische perspektivische Teildarstellung eines Verbindungszapfens und der Zapfenaufnahmen an der Stützsäule sowie dem Transportwagen,

Figur 3

eine teilweise geschnitten dargestellte Seitenansicht eines Verbindungselementes,

Figur 4

eine Stirnansicht eines Verbindungselementes in Richtung des Pfeiles A in Figur 3,

Figur 5

eine schematische Schnittzeichnung zur Darstellung eines in der Zapfenaufnahme der Stützsäule verriegelten Verbindungselementes,

Figur 6

eine der Figur 5 entsprechende Darstellung eines Verbindungselementes, das sowohl in die Zapfenaufnahme der Stützsäule als auch die Zapfenaufnahme des Transportwagens eingreift,

Figur 7

eine der Figur 5 entsprechende Darstellung eines in die Zapfenaufnahme am Transportwagen 7 eingreifenden Verbindungselementes,

Figuren 8a bis 8c

Seitenansichten bzw. eine Vorderansicht einer Verriegelungsklinke,

Figur 9

eine schematische Seitenansicht, welche ein Verbindungselement beim gleichzeitigen Eingriff mit den Zapfenaufnahmen an der Säule und dem Transportwagen in der Übergabestellung derselben zeigt, und

Figur 10

eine der Figur 9 entsprechende Ansicht, wobei das Verbindungselement angehoben und gekippt ist.

Further features and advantages of the invention will become apparent from the following description, which in connection with the accompanying drawings explains the invention using an exemplary embodiment. Show it:

Figure 1a to g

schematic sketches to explain the functionality of the mobile patient support system,

Figure 2

a partially schematic perspective partial view of a connecting pin and the pin receptacles on the support column and the transport trolley,

Figure 3

2 shows a side view of a connecting element, shown in partial section,

Figure 4

3 shows an end view of a connecting element in the direction of arrow A in FIG. 3,

Figure 5

2 shows a schematic sectional drawing to show a connecting element locked in the pin receptacle of the support column,

Figure 6

5 shows a representation of a connecting element which engages both in the peg receptacle of the support column and in the peg receptacle of the transport carriage,

Figure 7

5 shows a representation of a connecting element engaging in the pin receptacle on the transport carriage 7,

Figures 8a to 8c

Side views or a front view of a locking latch,

Figure 9

is a schematic side view showing a connecting element in simultaneous engagement with the pin receptacles on the column and the trolley in the transfer position thereof, and

Figure 10

a view corresponding to Figure 9, wherein the connecting element is raised and tilted.

In FIG. 1a one can see a support column, generally designated 10, of an operating table with a column base 12 and a column head 14 mounted thereon in a height-adjustable manner. The height adjustment device is not shown. It can be designed in any conventional manner. As a rule, it will be a hydraulic or mechanical lifting device.

To the left of the support column is a trolley, generally designated 16, which carries a bearing surface or table top 18 of the operating table. The transport carriage 16 contains two side frame parts 20 which are connected to one another by cross bars (FIG. 1d). The cross bars 25, 27 are located in a central area, so that the space between the side frames 20 is freely accessible from the rollers 28 at the right end of the transport carriage in FIG. 1 to the cross bars 25, 27. As a result, the transport carriage 16 can be moved towards the support column 10 such that it lies between the frame parts 20, as can be seen in the schematic plan view of the transport carriage and the support column shown in section in FIG. 1d.

At the upper ends of the somewhat asymmetrically shaped side frame 20 pin receptacles 22 are formed, which are intended to receive connecting elements 24, which are arranged on the longitudinal side edges of the table top 18 projecting downwards from the latter. The exact shape of the connecting elements and pin receptacles is based on the other figures explained in more detail. On two opposite sides of the column head 14 pin receptacles 26 are also arranged and aligned so that they are opposite the pin receptacles 22 on the transport carriage 16 in the position of the transport carriage 16 shown in FIG. 1d relative to the support column 10.

To transfer the table top or bearing surface 18 from the transport carriage 16 to the support column 10, the transport carriage 16 moves into the position shown in FIG. 1b relative to the support column 10. In this position, the connecting elements 24 are exactly above the pin receptacles 26 on the column head 14 the column head 14 is raised by the column-internal lifting device until the connecting elements 24 on the bearing surface 18 are completely inserted into the pin receptacles 26 on the column head 14. At this time, the connecting elements 24 simultaneously engage in the pin receptacles 22 on the transport carriage 16 and in the pin receptacles 26 on the column head 14.

Now the column head 14 is raised further according to FIG. 1e until the bearing surface 18 with its connecting elements 24 is lifted out of the pin receptacles 22 of the transport carriage 16. This can now be removed (Figure 1f). The operating table can be adjusted in the usual way to the desired working height as required (Figure 1g). When the bearing surface is transferred from the support column 10 to the transport carriage 16, the procedure is reversed.

The bearing surface 18 must be locked both on the support column 10 and on the transport carriage in order to prevent the bearing surface from being unintentionally detached from the respective carrying device. Like this locking and unlocking during the transfer of the storage area from the support area on the trolley 16 or vice versa, will now be explained in more detail with reference to the other figures.

The connecting elements 24 are shown in more detail in FIGS. 3 and 4. Each connecting element 24 comprises a cuboidal flange part 30 with bores 32, through which bolts for fastening the connecting elements 24 to the bearing surface 18 can be guided. A trapezoidal base body 34 is integrally connected to the flange part 30 and tapers away from the flange part 30 both in the side view and in the end view, as can be seen from a comparison of FIGS. 3 and 4. The base body has on its front or narrow sides two fork-like recesses 36, in each of which a pawl 38 is pivotally mounted about an axis 40. The pawl 38 has on its inner upper edge a stop 42 which prevents the pawl 38 from pivoting out of the fork-shaped recess 36 by hitting a counter stop 44 of the base body 34, as can be seen in FIG. 3. Both pawls 38 are biased into their outer pivot position by a helical compression spring 46 acting between them.

The pin receptacles 22 on the transport carriage 16 and the pin receptacles 26 on the column head 14 are of identical design (FIG. 2). They are adapted in shape to the base body 34 of the connecting element 24, but only enclose it halfway. The two open pin receptacles 22 and 26, with their open sides facing one another, form a receptacle that completely surrounds the respective connecting element 24. It is essential, however, that each peg receptacle has a pawl receptacle recess only on a side surface facing the end faces of the connecting element 24 or has locking recess 48, while the other side surface 50 forms a control surface.

If the connecting element 24 is inserted into the pin receptacle 26 of the column head 14 (FIGS. 2 and 5), the pawl 38 on the right in these figures can engage in the associated latching recess 48. The pawl 38 on the left in the figures, on the other hand, is pressed by the control surface 50 against the force of the helical compression spring 46 into the base body 34 of the connecting element 24, as shown in FIG. It should be noted that the pawls 38 are only half in the direction of their axes within the pin receptacle 26 on the column head 14. The axis-normal plane up to which the connecting element 24 lies within the pin receptacle 26 on the column head 14 is denoted by 52 in FIG.

FIG. 7 shows the state in which the connecting element 24 is inserted into the pin receptacle 22 on the transport carriage 16. Here, the pawl 38 on the left in FIGS. 2 and 7 snaps into the provided recess 48, while the right pawl 38 is pressed into the base body 34 of the connecting element 24 by the smooth control surface 50. It can be seen from the illustrations in FIGS. 5 and 7 that the bearing surface 18 is locked both on the column head 14 and on the transport carriage 16 and is thus secured.

In contrast, when the transfer takes place, there is a state in which the connecting element 24 simultaneously engages in the pin receptacle 22 on the transport carriage 16 and in the pin receptacle 26 on the column head 14. This state is shown in Figures 6a and 6b. 6a shows the state with respect to the column 10 and FIG. 6b with respect to the transport carriage 16.

Since each of the pawls 38 abuts a control surface 50, namely the left pawl 38 on the control surface 50 of the pin receptacle 26 on the column head 14 and the right pawl 38 on the control surface 50 of the pin receptacle 22 on the transport carriage 16, both pawls 38 are in the base body 34 of the connecting element 24 pressed in and thus unlocked. This can be seen on the right side of FIG. 6a and on the left side of FIG. 6b. This unlocking occurs automatically at the moment when the pin receptacles 22, 26 of the column head 14 and the trolley 16 are at the same height. If, starting from this position, the column head 14 is lowered relative to the transport carriage 16 (the transport carriage 16 takes over the bearing surface 18), the pawl 38 on the left in FIG. 6b can snap into the provided recess 48 of the pin receptacle 22 on the transport carriage 16 and thus the bearing surface 18 Secure the trolley 16. Conversely, if, starting from the position shown in FIG. 6a, the column head 14 is raised to take over the bearing surface 18 from the transport carriage 16, the right pawl 38 is released from the control surface 50 and can be inserted into the right-hand locking recess 48 of the pin receptacle 26 on Snap the column head 14 into place. In this case, too, the bearing surface 18 is automatically locked on the column head 14.

In FIGS. 5 to 7, the latches 38 have only been shown schematically in order to explain their basic function when transferring the patient support surface from the support column 10 to the transport carriage 16 or vice versa. From the transfer position shown in FIGS. 6a and 6b, in which the pin receptacles 22, 26 on the support column 10 and the transport carriage 16 are at the same height, the connecting elements 24 could be lifted out of the pin receptacles 26 and 22 on the support column 10 and the transport carriage 16 become. To prevent this, the locking pawls 38 and the control cams 50 formed in a special way, which will now be explained in more detail with reference to Figures 8 to 10.

Figures 8a and 8b show a left and a right side view of a locking pawl 38, while Figure 8c shows a view of the outside or front of the locking pawl 38 looking in the direction perpendicular to the pawl pivot axis. Each locking pawl 38 has a latching or locking section 54 or a control section 56 (FIGS. 2 and 8c) on both sides of a plane 52 drawn in FIG. 2 and directed perpendicular to the pawl pivot axis 40. The two sections 54, 56 coincide in their upper head section. A first latching step 58 is formed on this head section, with which the pawls 38 engage in the latching receptacles 48 when the connecting elements 24 are connected to the support column 10 or the transport carriage 16.

The latching section 54 also has a second latching step 60, which has a smaller radial distance from the pawl pivot axis than the first latching step 58. In the latching section 54, the triangular cutout 62 recognizable in FIGS. 8a and 8b is further provided, which should enable the respective pawl 38 to be pivoted into the latching cutout 48, as can be seen from FIG. 9.

The control section 56 has a substantially rectilinear section 64 starting from the first latching step 58 and a control curve 66 which curves inward with transition radii, the shape of which can be seen in FIGS. 8a and 8b.

On the respective control surface 50 in the pin receptacles 26 and 22 of the support column 10 or the trolley 16, a hump-shaped control cam 68 is formed, which for Interaction with the control section 56 on the locking pawl 38 is determined.

FIG. 9 schematically shows the pin receptacles 22 and 26 in their transfer position, in which their contours completely overlap. It is assumed here that, according to the illustration in FIG. 2, the locking recess 48 on the left in FIG. 9 and the control cam 68 on the right in FIG. 9 belong to the pin receptacle 22 on the trolley 16, while the locking recess 48 on the right in FIG. 9 and the control cam on the left in FIG. 9 68 belong to the pin receptacle 26 on the support column 10. The connecting element 24 is fully inserted into both pin receptacles 22 and 26, so that both locking pawls 38 are pivoted into their release position. In terms of function, the illustration in FIG. 9 corresponds to the situation shown in FIGS. 6a and 6b. As can be seen in FIG. 9, the two pawls 38 are pivoted into their release position in that the respective control cam 68 rests on the essentially straight part of the control section 56 of the respective pawl 38. The latching section 54 is located completely outside the contour of the respective latching recess 48.

As can be seen in FIGS. 6a and 6b, when the connecting elements 24 are lifted out of the pin receptacles 22 and 24, which remain in their transfer position, the pawls 38 cannot pivot into the respective latching recess 48, since the upper edge of the respective latching section corresponds to the first latching step 58 on the pawl 38 according to the invention is immediately led out of the contour of the respective locking recess 48. On the other hand, in the solution according to the invention, the connecting element 24 is lifted up or misjudged from the two pin receptacles 22, 24 in its transfer position, as shown in FIG. 10 shows, then due to the shape and position of the control cam 68 and the control cam 66, at least one pivot pawl 38 can pivot so far out that the second latching step 60 snaps into the latching recess 48, as shown in the left half of FIG. 10, so that a further pulling out of the connecting element 24 from the pin receptacles 22, 26 is prevented. This arrangement thus reliably prevents the bearing surface 18 from being removed from the support column 10 and the transport carriage 16 at the moment the bearing surface 18 is transferred from the support column 10 to the transport carriage 16 or vice versa, or unintentionally detaching. This further increases the security of the mobile patient support system.

Claims (1)

Mobile patient support system comprising a support surface (18), a support column (10) for supporting the support surface (18) and a transport trolley (16) for transporting the support surface (18), which is caused by a relative movement between the transport trolley (16) and the support column (10) can be transferred from this to the transport trolley (16) and vice versa and on which at least two peg-shaped connecting elements (24) are arranged, which can be inserted into complementary peg receptacles (26) on the support column (10) or the transport trolley (16) for connection to the same are, on each connecting element (24) at least two locking pawls (38) are pivoted such that they are adjustable between a locking position and a release position and during the transfer process engage in a column-side and a carriage-side pin receptacle (26; 22) at the same time, whereby furthermore, in each pin receptacle (26; 22) there is a catch recess (48) for receiving one of the ver locking pawls (38) in their locking position and a control surface (50) assigned to the respective other locking pawl (38), which transfers this locking pawl (38) into its release position when the connecting element (24) is inserted, and the locking pawls two sections (54 , 56), one of which for engaging in the locking recess (48) of a pin receptacle (26; 22) of the support column (10) or of the transport carriage (16) and the other for contact with the control surface (50) of the pin receptacle (22; 26) of the respective other part (transport carriage, support column), characterized in that for engagement determined in the locking recess (48) of the respective pin receptacle (26; 22) Section of a locking pawl (38) has two locking steps (58, 60) at different distances from the pawl pivot axis (40) that a control cam (68) is formed on the control surface (50) of each pin receptacle (26; 22) and that For contact with the control surface (50) of the pin receptacle (26; 22), certain section (56) of the locking pawls (38) has a control cam (66) designed to interact with the control cam (68) and the control surface (50), position and the shape of the control cam (68) and the control cam (66) are determined such that when the connecting element (24) moves relative to both the pin receptacles (26; 22) of the support column (10) and the transport carriage (16) in their transfer position Locking pawls (38) are pivoted by a partial amount of their maximum pivoting angle and engage with the latching step (60) closer to the ratchet pivoting axis (40) in the respective latching recess (48), while the v on the pawl pivot axis (40) further distant step (58) when the pin receptacles (26; 22) in relation to each other in the locking recess (48) in the pin receptacle (26; 22) of the part taking over the bearing surface (18) (support column (10), trolley (16)).

Images