DE1970362U - CHASSIS, IN PARTICULAR FOR SICK BEDS OR. DGL. - Google Patents

Description

chassis

The innovation relates to a chassis made of hollow profiles, in particular for hospital beds or the like. _{9 with castors 8} arranged at the lower ends of the vertical columns, the pivoting and rotating movement of which can be blocked by a central S test device.

The swivel - and rotation of all Bollen of a chassis of the type mentioned brings indeed a favorable all-round maneuverability ₉ prepares Difficult but directing _s when the chassis is to be moved in a certain direction. In practice, this need arises primarily with hospital beds.

The object of the innovation, it is a chassis ₉ of said type so as to form _s that a direction stable steerability ₈ is achieved under the existing advantageous shared se components of the central control device for the blocking of such a chassis.

This object is achieved according to the invention in that the central control device has three latching positions ₉ of which the position of the release position of these steering rollers adjacent to the pivoting and rotational blocking position of several steering rollers is maintained

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PATENT ADVERTISER DR. HANS RIEDER PATENT ADVERTISER DR. H.-J. RIEDER

SHEET 2 OF 12 681

FROM 5.6.I967

the freedom of rotation corresponding to at least a further steering roller and the third recoverable after exceeding this locking position position of rotational freedom and freedom from blocking is associated with the former steering rollers _3, however, the direction setting corresponds to at least one rotation-free _s castor.

An advantageous design is achieved ^ when the innovation of two according to the lines leading to the steering rollers pushrod V-ertikalsäulen moved by a common control rod _s which the push rods associated with control curves and notches are so associated with one another ₉ that the one control curve already rises to a slide portion of the push rod and merges into a central locking recess, on which displacement section the other control cam still runs parallel to the displacement movement.

Finally, a favorable feature of the innovation is _a that the direction of one swivel castor is formed by a spring-loaded push rod coupled to the ^ release position in the swivel castor fork _s which entry grooves in the longitudinal direction of the chassis are assigned to the lower edge of the associated stationary ball bearing shell.

As a result of such a structure, a chassis that is favorable both in terms of manufacture and in terms of use is created. Above all, as a result of the directional fixability of at least one should, a significantly easier steerability of the frame is achieved, this largely without taking the load weight into account. In particular, the use of a corresponding chassis as a mobile substructure for hospital beds enables such beds to be transported more easily. The direction of travel is / is stabilized as best as possible by the appropriately defined role. The third detent position reserved for this directional definition does not impair the two other detent positions ₈ which are upstream and which are reserved for blocking and releasing the remaining castors. The middle detent position brings the lifting of the swivel and rotation blocking as well as the lifting of the directional lock. The entry into the respective locking position can be felt; it is thereby at the same time a control for the operator

PATENT ADVERTISER DR. HANS RIEDER PATENT ADVERTISER DR. H.-J. RIEDER

BLAn

_to 12 681

FROM THE

5.6. I967

given. As a result of favorable assignment of the individual components is a

A high level of functional reliability of the entire facility is achieved. To the

The corresponding swivel castor does not need directional fixing from the front to stand in the right position.

Further advantages and details are given below using an exemplary embodiment explained in more detail. Show it:

Fig. 1 the newly designed chassis with bed in a side view

Fig. 2 a front view of this _s

Fig. 3 shows a section along line AB in Fig. 2 ₉

Fig. K shows a section through the vertical column provided with the directionally lockable roller along line CD in Fig. 2 and

Fig. 5 is a perspective view of the end of this vertical column with the steering fork cut open for clarity, including the bearing.

The bed, which is designed as a hospital bed, has the chassis 1. It is made of hollow profiles _8, preferably of such a square or rectangular cross-section, _{9 in} such a way ₃ that laterally extending horizontal columns 2 are formed. Vertical columns 3j, for example of a round cross-section _3, extend from their underside. In the fastening area, each column 3 is widened conically.

In the open end of the vertical _{columns 3, 8} retaining pins k of swivel castors 5 _{enter s} appropriately offset. The swiveling and rotating movement of these steering rollers 5 can be blocked via a central control device 6.

Components of this central control device 6 are each one within the Horizontalsäien 2 arranged central control rod / and from these actuated push rods 8. These push rods 8 are housed within the vertical columns 3 and are spring-loaded in the blocking direction. The spring - a helical spring 9 - is pushed onto the push rod 8. It occurs against an annular collar 1o of the rod 8. The terminal spring coil the other end of the spring 9 is supported on the floor 11

PATENT ADVERTISER DR. HANS RIEDER PATENT ADVERTISER DR. H.-J. RIEDER

SHEET k TO 12 681

FROM 5.6.I967

a bushing held between the retaining pin k and the column wall 12 there ... 13. The latter also helps to stabilize the end section of the vertical column 3.

The front end * \ k penetrating a central bore k 'of the retaining pin k acts on a lever 15 with an expansion plate 16. The spreader plate 16 extends between tabs 17 and 18 riveted to one another at the ends. These are made of spring steel. During the rag I? In the blocking position, the pivoting movement of the castor 5 is blocked by engaging the upwardly angled bar I7 ¹ in the Verzahnungsab section of a fixed ball bearing ring I9 ^ the tab 18 is pressed against the running surface 2o 'of the roller 2o at the same time. A pin 22 penetrating the caster fork 21 secures the tabs I7 and 18, which are only loosely embedded here. To fix the position of the spreader plate lever 15, the extension 23 protruding beyond the end face Ik also enters a slot of the lever I5.

Push rods 8 and central control rods 7 are interposed a clearance y coupled to one another; this clearance is still guaranteed in spite of the wear and tear of the rubber tires of the impeller the targeted secure blocking.

To cancel the blocking, the central control rods 7 have a rising control flank 2k in the area of each push rod 8. This is overlapped by a pin 25 of the push rod 8. An axial displacement of the central control rods in the direction of the arrow ζ results in the lifting of the blocking position, since the control flank Zk lifts the push rod 8 against the spring action _a, that is, against the direction of the arrow χ. In order to maintain the blocking-free position without interference, the control flank 2k is followed by a latching recess 2k * for storing the pin 25.

The central control rods 7 are actuated by means of a foot or Hand lever 26. It is bow-shaped and engages with its flattened

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PATENT ADVERTISER DR. HANS RIEDER BLATT 5 TO 12 681 OF 5.6.1967

PATENT ADVOCATE DR. H.-J. RIEDER

th ends 26 'through a slot 27 in the interior of the two horizontal columns 2. Here it is via a cross pin 28 with the ends of the central control rods 7 coupled. The flattened ends 26 'have a open slot 29. Bearing blocks 3 ° are arranged at the edge of the slot. The bearing pin is denoted by 31.

The central control rods 7 are guided in the area above the vertical columns 3 in a bearing bush 32. To reduce sliding friction, these are made of self-lubricating plastic. The bearing bush 32 is simultaneously crossed ₉ by the push rod 8, for which purpose the bearing bush has a corresponding transverse bore 33. The passage opening for the central control rod 7 is adapted to the cross section of this rod. A retaining screw ~ $ h is used to secure the position additionally.

The in fig k. Illustrated steering roller 5 'is exclusively related. Its pivotability fixable _s and that in the longitudinal direction of the chassis, this 6. using the central controller, the central controller 6 is composed of three detent positions I ₉ II and III. Of the detent positions I - III, the position II, which is adjacent to the swivel and rotation blocking position I for the swivel castors 5, is reserved for the release of these _{swivel castors s} this while maintaining the freedom of rotation of one swivel castor 5 'The freedom of rotation of this swivel castor 5 * is still through Maintain the special shape of the control rod 7: While the control cam 2k , which removes the blocking, rises on a displacement section a, as already mentioned above, and enters the central locking recess 2h ^x ₈ , the control cam A-9 still runs parallel to the displacement movement of the control rod 7

The third _s after exceeding the locking position II recoverable position III is associated with the rotational freedom and freedom from blocking the castors. 5 This position III now corresponds to the direction of establishing _one's usual rotation-free castor 5 '·

The position III is through entry of the pin 25 of the push rod 8 ' defined in the locking recess 5o. This level of deepening is achieved by the Pin 25 after overcoming the rising control curve section ^ 9 '

PATENT ADVERTISER DR. HANS RIEDER PATENT ADVERTISER DR. H.-J. RIEDER

LEAF

TO 12 681

FROM 5.6.1967

In this case, the push rod 8 ', which is designed in principle of the other three push rods 8, is raised against the action of the spring 9'. A leaf spring 51 coupled to the push rod 8 'is also drawn into an entry groove 52 counter to its downwardly directed inherent resilience. The latter is incorporated into the ball bearing shell I9 ¹ . It points in the longitudinal direction of the chassis 1 and therefore also fixes the roller 5 'in the corresponding direction. Diametrically opposite the entry groove 52 is a groove 53j of the same type, into which the leaf spring 5I can enter when the chassis is displaced in the opposite direction. To determine the direction, the castor 5 'does not need to be in the correct position from the outset. The spring 5I even then causes the clutch engagement by fixing the steering roller 2o, which is still deflected back and forth when the bed is approached, by snapping into the grooves 52 _S 53 aligned in the longitudinal direction of the bed. The coupling between the leaf spring 5I - this is preferably double - and the push rod 8 ¹ is such that the free, frontal end of the leaf spring enters an annular groove 56 of the push rod with the edge zone of a niche 55 there. The leaf spring is attached to the base plate 8 of the roller fork 21 'by means of two rivets 57.

By determining the direction of at least one swivel castor in the above Way, a simplified steering of the chassis can be carried out.

The collar I0 ¹ in the position shown in Fig. 4 rests on the end edge 4 "of the sleeve-shaped retaining pin 4. This makes it possible, leaving a small distance between pin 25 and cam 49, the control rod 7 from unnecessary, the light To keep shifting movement free of any interfering transverse forces.

The chassis can be provided with any type of superstructure. In the present case, it is also created using a hollow profile construction Mattress frame 43 in its entirety around an axis 44 can be tilted to the desired inclination adjustment. The position assumed can be fixed by an adjusting device 45. Additionally

PATENT ADVERTISER DR. HANS RIEDER PATENT ADVERTISER DR. H.-J. RIEDER

BLAH

7 US 12 681

FROM 5-6.1967

a backrest ko can be changed in its angular position by means of an adjusting device 4-7.

The central control rod 7 can have an extended section * t8 can also be activated directly.

f \ AA C

Claims (2)

1, Chassis consisting of hollow profiles, especially for hospital beds or the like, with castors arranged at the lower ends of the vertical columns, the pivoting and rotating movement of which can be blocked by a central control device, characterized in that the 2-directional control device (6) dr © i has locking positions (I ₁ II and III), of which the swivel and ^ Drehbloekierungsstellung (I) fflohrörer castors (2) adjacent position (II) of the release position of these long rollers (5) while maintaining the freedom of rotation Mndoatens a further castor (^ ¹ ) and the third position (III), which can be achieved after this bast position (II) has been exceeded, is assigned to freedom of rotation and freedom from blocking of the ercteroa swivel castors (5), but corresponds to the fixing of at least the one swivel-free swivel castor (5 '). 2. Chassis according to Anapruch 1, characterized in that the push rods (8 or S ¹ ) leading to the steering rollers (5 or 5 ') of two vertical columns (3) are moved by a common control rod (7) whose push rods ( 8 or 8 ') assigned control cams and boxes are assigned to one another in such a way that the aine control cam (2 ^) on a displacement section. (A) dor the push rod | (S) already rises and merges into an aittlere Kaötvertieiung (2V), on which Verochiobeabechnitt (a) the other control cam (49) still runs parallel to the sliding movement. 3 · Chassis according to Claim, characterized in that the Sichtungsfeststellung of a steering roller (5 ¹⁾ eats formed by a coupled with the föderbelßteten in the release position the push rod (8 x) leaf spring (£ 1) in the steering wheel fork (21 ·), which in the longitudinal direction of the chassis (1) lying inlet grooves (52 and 53) on the lower band of the associated stationary ball bearing shell (19 *) are assigned.