EP3113743A1

EP3113743A1 - Stand-up wheelchair

Info

Publication number: EP3113743A1
Application number: EP15710417.5A
Authority: EP
Inventors: Thomas Frei
Original assignee: Levo AG Wohlen
Current assignee: Levo AG Wohlen
Priority date: 2014-03-04
Filing date: 2015-03-04
Publication date: 2017-01-11
Anticipated expiration: 2035-03-04
Also published as: EP3113743B1; AU2015226781B2; CA2941579A1; US10314751B2; CH709358A1; CA2941579C; US20170156954A1; AU2015226781A1; US20190358103A1; WO2015131296A1; NZ723965A; US10874566B2

Abstract

The invention relates to a stand-up wheelchair, comprising a chassis (13) and a stand-up frame (19) articulated to the chassis (13). The stand-up frame (19) comprises a sitting rod (25) and an adjusting rod (27) as essential components. The front ends thereof are articulated to the chassis (13) and can be pivoted about a first joint point (29) and a second joint point (31). The backrest (23) is articulated to the rear ends of the sitting rod (25) and of the adjusting rod (27) at a third and a fourth joint point (35, 37). One of the joint points (29, 31, 35, 37) can be moved in relation to the other joint points and thus can effect a tilt adjustment of the backrest (23), wherein simultaneously the backrest (23) is caused to be in a stand-up position substantially parallel to the sitting surface.

Description

Stoll trolls

The invention relates to a Aufrichtrollstuhl with a chassis and a hinged on the chassis raising rack, a first and a second

Parallelogram lever, whose front ends are hinged to the chassis and pivotable about a first and a second pivot point and at the rear ends of the backrest is articulated at a third and a fourth hinge point.

State of the art

European patent EP 0 815 822 discloses a righting wheelchair having a

Chassis and a Aufrichtgestell comprising a seat and a backrest. The erecting frame comprises two parallelogram levers, the front ends of which are articulated to the chassis and pivotable about fixed pivots. At the rear ends of the ParaUelograrrvmhebel the backrest is hinged. The Anlenkun the Aufrichtgestells by means of two parallelogram lever has the advantage that the

Backrest does not change the inclination angle when erecting the erecting rack, i. the angle of inclination which the backrest occupies relative to the horizontal in the sitting position is also present in the erecting position.

A disadvantage of the Aufrichtrollstuhls described is that the backrest is not adjustable in inclination. An adjustability of the backrest is desirable because the wheelchair users want to adjust the inclination of the backrest depending on the operation. Thus, during sporty activities with the wheelchair (active driving behavior), the backrest is tilted slightly forward so that it occupies an acute angle with the horizontal. For other activities, however, the wheelchair user wants to sit relaxed in the wheelchair and will tilt the backrest backwards accordingly (obtuse angle).

Of importance for a roll-up wheelchair is that in the A uf richtposition the

Seat and the backrest surface are arranged substantially parallel to each other. However, if the backrest assumes an angle greater than or less than 90 degrees to the seating surface in the seating position, then the required parallelism is not

confirmation copy more given. This has the disadvantage for the Roüstuhlf teacher, that he can not be supported in the upright position mt the whole body on Aufrichtgestell.

The erecting wheelchair according to EP 0 815 822 has a frame formed from tubes on which the front and rear wheels are arranged. The leg of a legrest is translationally guided in the frame, which makes the footrest a stable

Gives leadership. The Aufrichtgestell is pivotally connected via a connecting member with the shaft of the legrest such that when erecting the Au frichtges partly the footrest moves down. A disadvantage of this construction is that the footrest is arranged so far in front of the seat, that the assumption of a dynamic sitting position is prevented by the wheelchair user. In particular, wheelchair users who do sports want to take an active driving position to increase the maneuverability of the wheelchair. Such is characterized in that the

Backrest with the seat occupies an acute angle, and the feet are placed as close to the body. In DE 20 2007 018 454 Ul a trolley trolley is disclosed, which has a consisting of two longer and two shorter levers articulated parallelogram. The longer levers are adjustable in length. The shorter and longer levers are connected to joints, which joints allow only a Rota tionbe wegun g the lever relative to each other. The axis of rotation of the seat occupies a different position on the frame than the axis of rotation of the articulated parallelogram. As a result, the back adjustment has a self-contained articulated parallelogram and the seat moves independently of this. When erecting the wheelchair, the distance between the backrest and the seat surface of the seat is shortened. A shearing motion between the back pad and the back of the roller s t uh 1 benu tze rs is prevented. The mechanics of this Aufrichtrollstuhls is very expensive. The pivot points of the articulated parallelogram, the seat and the backrest lie in the

Erect position not in one plane. As a result, the wheelchair user can not lean against the seat and back cushions with his entire body.

The Aufrichtrollsluhl according to EP 2 389 914 AI is of a complicated

Lever system built. One of the levers is a length-adjustable gas spring, which allows the wheelchair to be set up. The seat and the gas spring are hinged at their front ends to the support frame of the wheelchair and hinged with their rear ends to a plate. The rear E de the seat is L-shaped, whereby the rear end of the seat in the region of the plate is offset in the erected position in the form of a step to the rear. The seat is therefore with the backrest in the erected position in any plane. The plate forms an unpleasant for the wheelchair user projection, which prevents the wheelchair user leaning against.

Object of the invention

It is therefore an object of the present invention to provide a sit-up wheelchair

provide that allows the taking of an active driving position. In particular, it is an object to provide a Aufrichtrollstuhl for V rfügung whose backrest - despite different angular positions to the seat in the sitting position - in the

Erecting position substantially in the same plane as the seat is. Also, the wheelchair as many settings allow, so that the same chair for different body sizes is customizable.

description

According to the invention, the aforementioned objectives are realized by the features of claim 1. Advantageous developments are defined in the subclaims. The invention relates to a Aufrichtrollstuhl with a chassis and a hinged on the chassis raising rack. The Aufrichtgestell has as essential components on a first and a second Parallelogrammhebel, hereinafter referred to as perch and control rod. Their front ends are hinged to the chassis and pivotable about a first and a second pivot point. At the rear ends of the seat bar and the control rod, the backrest is articulated at a third and a fourth pivot point.

According to the invention, one of the articulation points is adjustable relative to the other articulation points. It is particularly preferred if one of the hinge points a

Having adjustment, by means of which the position of said hinge point is variable and lockable relative to the other hinge points. This has the advantage that the inclination of the backrest over a displacement of a Hinge point can be adjusted. The displacement of a hinge point results in a distorted parallelogram, which is basically a four-link coupling mechanism. However, this can be designed so that the backrest in the erect position in turn aligns substantially parallel to the seat. As regards the parallelism of the backrest and the seat in the erecting position, it is assumed in the context of the present application that the backrest is parallel to the backrest support, in particular its lateral pillars, and the seat is parallel to the seat post.

Advantageously, the perch and the control rod have a different length. By adjusting the relative lengths of the parallelogram lever can a

Optimization of geometry can be achieved. In particular, the parallelism of the backrest and seat in the erect position can be optimized regardless of the inclination of the backrest in the sitting position.

According to an advantageous embodiment, one of the bars, preferably the control bar, is shorter than the perch, by a certain amount, preferably between 1 and 30 mm and more preferably between 15 and 25 mm. It has been found that relative length differences between 1 and 6% and preferably 2 and 4% are sufficient to achieve the desired functionality of the

To achieve backrest tilt in the sitting and Aufrichtpo ition, namely the backrest inclination - regardless of their inclination in the sitting position - i

From the sitting to the home office, there is no need to adjust. The maximum achievable by the displacement of a hinge point is advantageous

Tilt adjustment ± 12 degrees and preferably ± 8 degrees. Thus, the backrest inclination between 78 degrees and 102 degrees, resp. Adjust 82 and 98 degrees.

A displacement of a hinge point can be achieved in various ways. One possibility is to make the adjusting rod and / or the seat rod variable in length. This can, for example, with a threaded sleeve with two

opposite threads, similar to a wire tensioner can be achieved. Another possibility is to use one of the hinge points

To equip adjusting mechanism, with the help of which the position of said

Hinge point is variable relative to the other hinge points in stages. The adjusting mechanism can be realized for example by a slot and a locking element. The locking element can be, for example, a set screw or a clamping screw, which can be tightened in any position along the slot. The first part median ismu s can therefore be infinitely variable. Other

However, embodiments are conceivable, as described below.

It has proven to be advantageous if the slot is provided on a connecting piece which connects the third and fourth hinge point. The

Connector which acts as one of the levers of the lever parallelogram, may be formed such that the seat post, the control rod and the backrest column are hinged thereto and lie the seat post and the backrest column in the erected position in a plane. In a further particularly preferred embodiment, the pivoting mechanism is formed by a base plate and a pivot arm having a first and second end, wherein the pivot arm is pivotally connected at its first end pivotally about a fifth hinge point to the base plate. This has the advantage that the backrest inclination is infinitely adjustable and is quickly adjustable between different positions.

It is advantageous if the perch with d m third pivot point and the

Backrest are pivotally connected to the base plate and the control rod with the fourth pivot point is articulated mi d m the second end of the pivot arm connected. As a result, the swivel arm can be easily pivoted relative to the base plate, whereby the backrest inclination is very precisely adjustable.

Preferably, the end positions of the pivot arm are predetermined relative to the base plate by an eccentric. The eccentric can for example be realized by a turntable which rotates in the base plate and a bolt which is eccentrically fixed to the hub. The bolt is rotatably received in a passage of the swing arm. The eccentric allows the backrest tilt is very accurate and almost infinitely adjustable. In addition, the eccentric is durable and does not wear off.

Preferably, the position of the fourth pivot point is variable by means of the adjustment mechanism, because to adjust the adjustability of one of the rear

Hinges particularly advantageous. Conveniently, the two first (front) hinge points are fixed points.

Advantageously, the hinge points of the seat and the control rod in the longitudinal direction of the parallelogram are seen as offset by a certain distance from each other on the chassis, i. they do not lie vertically above each other, but are offset from one another.

In a preferred embodiment of the erecting wheelchair according to the invention, the chassis comprises two side parts, which are connected to one another via a strut. This results in a stable construction.

Another aspect of the invention relates to a Aufrichtrollstuhl with a

Chassis and a seat and a backrest having Aufrichtgestell. The Aufrichtgestell is pivotally hinged to the chassis. The wheelchair also has a leg support, which in the transition from the sitting position in the

Raising position is lowered to the ground. The chassis comprises two side parts, which are connected to each other via a strut. According to the invention, a single side part has a supporting profile with an arm protruding at an angle in the middle third of the supporting profile, on or in which a legrest is movably arranged. The mobility of the legrest has the advantage that it can be automatically extended when raising the wheelchair to be lowered on the ground. When returning to the sitting position, it can be returned to a comfortable position for the seated wheelchair user.

Advantageously, the arm is arranged at a distance from the front end on the support profile. This has the advantage that the legrest can be arranged close to the chair and allows the wheelchair user an ergonomic position of the legs. Conveniently, the legrest via a connecting link with the

Aufrichtgestell coupled such that when erecting the Aufrichtgestells the

Leg rest is moved forward and down. This has the advantage that a forced movement of the legrest is realized in a simple way. The link may be a lever or a gear with rack. This allows the legrest to rest on the ground in the upright position.

The leg support may each have on opposite sides a tube, which is axially movably guided in each case in a channel of the arm. Such a guide device is robust and resilient in any position. Conveniently, there is a downwardly projecting neck for the Anbringun the front wheels on the arm. The neck can be integral with the arm or be screwed to the side of this. The fact that the front wheels are arranged close to the rear wheels, results in a high maneuverability of the wheelchair.

Advantageously, the arm is arranged at a distance from the front end on the support profile. This has the advantage that the legrest can be arranged close to the chair. This allows the wheelchair user to assume a dynamic sitting position. It has been found that an angle of between 30 and 60 degrees, and preferably between 35 and 50 degrees, between the arm and the supporting profile is particularly suitable.

An embodiment of the invention will now be described in more detail with reference to the following figures. It shows:

Figure 1: A perspective view of an inventive on judging wheelchair consisting of a chassis and a Aufrichtgestell;

Figure 2 is a side view of the erecting wheelchair of Figure 1;

FIG. 3: A section through the middle of the seated position

On riehstuhls of Fig. 1;

Figure 4: A section through the middle of the in-upright position

upright wheelchair;

Figure 5 is a side view of the parallelogram and the backrest support of the Aufrichtgestells, wherein the backrest support is inclined forward with an adjusting mechanism in a first embodiment;

A side view of the Parallelogrammhebel and the backrest support of the Aufrichtgestells, wherein the backrest support is inclined backwards; A side view of a side part of the chassis mi with the second parallelogram in the erect position and extended legrest; A longitudinal section through the side part of the chassis with

withdrawn legrest;

A longitudinal section through the side part of the chassis analogous to Figure 8 with the second parallelogram in the erect position. A support for the erecting rack;

An adjusting mechanism in a second embodiment and

The adjusting mechanism of Figure 11 in an exploded view. in Figures 1 to 10, a Aufrichtstuhl 11 is shown according to the invention. The Aufrichtstuhl 11 has a chassis 13 with front wheels 15 and rear wheels 17, and a Aufrichtgestell 19, on which a seat 21 and a backrest 23 is arranged. The Aufrichtgestell 19 consists essentially of two levers, namely a seat post 25 and a steep rod 27, the front ends at a first and a second hinge point 29, respectively. 31 are hinged to the chassis 13. At the rear ends of the seat rod 25 and the control rod 27 is a

Backrest support 33 hinged. The backrest support 33 consists of a column 32 and a connecting piece 34, wherein the articulation of the perch 25 and the

Control rod 27 at a third and a fourth pivot point 35, respectively. 37 takes place. The backrest support 33 carries the backrest 23, wherein backrest support 33 and backrest 23 can in principle also be formed in one piece.

The special feature of the inventive Aufrichtstuhl is now that the position of a hinge point can be moved relative to the other hinge points, i. that the inclination of the backrest to the seat surface is variable. For this purpose, one of the hinge points is formed variable position. Present is a

Adjusting mechanism between the control rod 27 and the backrest support 33 is provided (Figures 5 and 6). This adjustment mechanism consists of a in

Connector 34 provided slot 39, in which a locking pin 41st a plurality of detent positions (not shown in the figures) can take. In order to realize this adjustability, different solutions are known to the person skilled in the art. It is conceivable, for example, a stepless adjustment. If the locking pin 41 is located to the right of the center of the elongated hole 39, then the angle between the seat rod 25 and the backrest support is <90 degrees (acute angle). On the other hand, if the locking bolt 41 is located to the left of the center of the elongated hole, then the angle between the seat rod 25 and the backrest support is> 90 degrees (obtuse angle). In principle, however, it is free to set the geometry of the arrangement so that not the center of the slot the 90 ° position between

Backrest support and the perch 25 defined.

The chassis 13 of the Aufrichtrollstuhls 11 comprises two side parts 45, which are interconnected by means of a strut 47 (Fig. 4). A single side part 45 comprises an elongated support profile 49, from which an arm 53 projects at an acute angle α at a distance from the front end 51. The angle α is between 30 and 70 degrees and preferably between 35 and 55 degrees. The front end 51 of the support profile 49 and the arm 53 are connected to each other by means of a connecting web 55 in order to ensure the necessary stability of the side part 45.

As can be seen in particular from Figures 8 and 9, the side part 45 is composed of several individual parts. The front end 51 and the distal end 57 of the arm 53 are j from a separate aluminum mini u mguss part 59 resp. 61 produced. The Alurnmiumgussteile 59, 61 are hollow, extruded

Aluminum profiles 63,65,67 preferably form and / or materially recognized. However, instead of aluminum, the side parts can also be made of a

Composite be produced. In the arm 53 is a channel 69, in which a leg rest 71 is guided axially movable. The legrest 71 consists of a tube 73 and a footrest 75, which is arranged at the lower end of the tubes 73 in height adjustable. At the upper end of the tube, a lever 77 is hinged (AnJenkpunkt 82). The lever 77 is coupled to a carriage 79 (pivot point 83), which is axially movably guided in a channel 81 of the support profile 49. On the inside of the support profile 49 is a slot 85 (FIG. 7) provided by means of a connecting bolt not shown in detail, the lever 87 is pivotally connected to the articulation point 83.

An advantage of the chassis 19 is that the arm 53 does not project beyond the front end 51 when the support profile 49 is arranged horizontally. This allows the legrest 71 to be retracted further than in the case of the erecting wheelchair cited at the outset

EP-A-0 815 822.

A lever 87 is pivotally connected at one end to the carriage 79 and at the other end to the control rod 27. When erecting the Aufrichtgestells 19, the legrest 71 is pushed out of the channel 69 and thus: moved towards the ground, so that the legrest 71 is supported in the upright position on the ground. At the

Collapse of Aufrichtgestells 19, however, the legrest 71 retracted so that it is in the sitting position at a distance to the ground. Due to the arrangement of the arm 53 in the middle third of the support section 49, the legrest 71 seen in Fahrtrichtun can be further withdrawn than the initially mentioned prior art. This has the advantage that the wheelchair user can take an active driving position, in which the lower leg with the

Thighs included an acute angle.

On the side part 45 and the front wheel 15 is rotatably arranged. For this purpose, a nozzle 89 is provided on the aluminum casting, on which the front wheel 15 is rotatably mounted.

The control rod 27 and the seat length 25 are connected to each other by means of two struts 91, 93. Between struts 47 and 93 is an actuator 95, e.g. a linear drive, articulated. It has an axially movable plunger 97, with the aid of d r distance between the struts 47,93 is variable. Will the plunger 97

moved out, the erecting frame 19, and vice versa, when the ram97 is retracted, then the Aufrichtgestell 19 moves together.

The rear wheels 17 are connected to each other by means of an axle 99. On this, the support profiles 49 are supported on a support 101. The support 101 consists of a mounting part 103 with a through hole 105 for receiving the rear axle 99. The through hole 105 has a slot 107, which by means of a screw not visible in the figure 10 can contract, so that the axis 99 can be clamped in the passage opening.

The mounting part 103 has an extension 109 with a corrugation 111 and a slot 113. A clasp 115 is placed on the mounting part 103, which also has a corrugation 121 on the inner surfaces 117 of the legs 119. Above the legs 119, a passage opening 123 for receiving the support profile 49 is formed. By means of two screws 125,127, the legs 119th

contracted and the clasp 115 on the mounting part in different

Locking positions are fixed. At the top of the clasp 115 is a damped part with a trough 129, in which the second parallelogram lift 27 is received in the sitting position.

On the backrest support 33, a cross connector 135 is attached. The armrests 133 are hinged thereto.

The backrest carrier 33 is in the embodiment shown in two parts consisting of the connecting piece 34 and the lateral columns 32. The latter are connected by means of a hinge 137 with the connecting piece 34. With the help of the joint 137, the columns 32 can be folded down for the transport of the chair. The hinge 137 is designed to allow preferably only 2 adjustment positions, namely a normal position, in which the columns 32 make an angle of approximately 90 degrees (depending on the position of the locking pin 41) with the rods 25, 27

include, and a transport position in which the columns 32 are folded down and can be arranged approximately parallel to the rods 25,27. The joint 137 is thus not intended for a tilt adjustment of the backrest, as the

Inclination adjustment in the inventive Aufrichtrollstuhl on the

Displacement of one of the hinge points takes place.

A displacement of a hinge point causes in the inventive Aufrichtrollstuhl proposed geometry next to an adjustment of the inclination of the backrest support 33, a change in the distance of the seat rod 25 of the control rod 27 and a change in their parallelism. By suitable

Adaptation of the two rods 25,27, in particular their relative length, as well the position of the hinge points 29,31 _/ 35,37 can be achieved that the columns 32 are in the erect position substantially parallel to the rods 25,27, even if the columns 32 in the sitting position forward (<90 °) or after are tilted at the rear (> 90 °). The inclination of the back-plane carrier 33 can also be effected with an adjusting mechanism according to FIGS. 11 and 12. Instead of the connecting piece 34, a base plate 139 and a pivot arm 141 is provided. According to FIG. 12, both consist of 3 parallel plates, but base plate 139 and pivot arm 141 can also be made in one piece. The pivot arm 141 is fixed at its first end with a fifth pivot point 143 rotatable on the base plate 139. Of the

Verschwenkarm 141 can now be moved via an eccentric 145 relative to the base plate 139. The eccentric 145 comprises a rotary disk 147 and a bolt 149. The bolt 149 is fixed eccentrically to the rotary disk 147. The turntable 147 is rotatably received on the base plate 139, whereas the bolt 149 is rotatably passed through an opening 151 of the pivot arm 141. The eccentric 145 are two end positions for the pivot arm 141 relative to the

Base plate 139 before. These end positions also correspond to the maximum

Inclinations of the backrest support 33 and the columns 32 forward and backward. As a result, the same effect is achieved as with the slot 39 and the locking pin 41, the angle between the seat 21 and backrest 23, however, is infinitely adjustable. If the desired angle is set, it is possible to clamp the eccentric 145 with a screw 153. It can be adjusted in this way angle of about + - 10 °, but theoretically larger angles would be possible.

When distorting the "near-parallelogram" remains the control rod 27, as a result of the actuator 95 always in place, the perch 25, however, changed their

Angle. But since the perch 25 should always come to lie on the Muldel29 of Hinterachshalters, therefore, after the distortion nor the control rod 27 must be slightly lowered or raised, depending on whether the back angle was increased or decreased. This is done via a leveling screw on the control rod 27. This screw changes the position of the pickup point of the actuator 95 a little and since the actuator 95 is not changed in length, thereby changing the Position of the control rod 27 and thus also the position of the perch 25. The perch 25 is thus slightly raised or lowered, so that it is fed in the trough 129.

The invention relates to a Aufrichtrollstuhl with a chassis and a hinged on the chassis raising rack. The Aufrichtgestell has as essential components on a seat post and a control rod. Their front ends are hinged to the chassis and pivotable about a first and a second pivot point. At the rear ends of the seat and the control rod is the

Backrest articulated at a third and a fourth pivot point. One of the hinge points is adjustable relative to the other hinge points and thus can cause a tilt adjustment of the backrest in the sitting position, wherein the hinge points are arranged relative to each other, that the backrest resp. the pillars of the backrest wear in the erect position nevertheless substantially parallel to the seat, respectively. the perch is.

Legend

11 Raising chair

13 chassis

15 front wheels

17 rear wheels

19 Raising rack

21 seat area

23 backrest

25 perch (first parallelogram lever)

27 control rod (second parallelogram lever)

29 first pivot point

31 second hinge point

32 pillar

33 backrest support

34 connector

35 third pivot point

37 fourth pivot point

39 slot

41 locking bolts

45 side panel

47 strut

49 supporting profile

51 front end of the arm 53

53 arm

55 connecting bridge

57 distal end of the arm 53

59 aluminum casting (front end)

61 aluminum casting (distal end of arm 53)

63,65,67 aluminum profiles

69 channel of the arm 53

71 leg rest pipe

footrest

lever

carriage

Channel of the support profile 49

Bore in the carriage

slot

lever

Support

Final struts between the levers 27

strut

actuator

tappet

axis

In stock

mounting part

Through opening

slot

extension

Rif feiung

Long hole

clasp

inner surfaces

leg

Riffeing of thighs 119

Through opening

screw

trough

Thighs of the strap

base leg

joint

baseplate swivel arm

Fifth joint eccentric

turntable

bolt

opening

screw

Claims

Pa tents claims

Aufrichtrollstuhl with a chassis (13) and a chassis on the (13) hinged on rieh frame (19) having a seat rod (25) and an actuating rod (27) whose front ends hinged to the chassis (13) and a first ( 29) and a second hinge point (31) are pivotable and at the rear ends of the backrest (23) at a third (35) and a fourth hinge point (37) is hinged,

characterized,

in that one of the articulation points (29, 31, 35, 37) has an adjusting mechanism (39, 41) with the aid of which the position of said articulation point can be changed and determined relative to the other articulation points.

Erecting wheelchair according to claim 1, characterized in that the

Seat rod (25) and the control rod (27) have a different length.

Raising wheelchair according to claim 1 or 2, characterized in that one of the rods, preferably the control rod (27), to a certain extent, preferably between 1 and 30 mm and more preferably between 15 and 25 mm, shorter than the perch (25) ,

Raising wheelchair according to one of claims 1 to 3, characterized in that the adjusting rod (27) and / or the perch (25) is variable in length.

Erecting wheelchair according to one of claims 1 to 4, characterized in that the adjusting mechanism (39, 41) is formed by a slot (39) and a

Locking element (41) is formed.

Raising wheelchair according to claim 5, characterized in that the slot (39) on a connecting piece (34) is provided, which connects the third and fourth hinge point (35,37).

Erecting wheelchair according to one of claims 1 to 4, characterized in that the adjusting mechanism (139,141) by a base plate (139) and a pivot arm (141) is formed with a first and second end, wherein the Swivel arm (141) pivotally connected at its first end about a fifth hinge point (143) to the base plate (139).

8. Aufrichtrollstuhl according to claim 7, characterized in that the

Seat post (25) with the third hinge point (35) and the backrest (23) are pivotally connected to the base plate (139) and the control rod (27) with the fourth hinge point (37) hinged to the second end of the

Swivel arm (141) is connected.

9. Aufrichtrollstuhl according to one of claims 7 or 8, characterized in that the end positions of the pivot arm (141) relative to the base plate (139) by an eccentric (145) are predetermined.

10. Aufrichtrollstuhl according to one of claims 1 to 9, characterized in that the position of the fourth hinge point (37) by means of the adjusting mechanism (39,41,139,141) is variable.

11. Aufrichtrollstuhl according to one of claims 1 to 10, characterized in that the two first pivot points (29,31) are fixed points.

12. Aufrichtrollstuhl according to one of claims 1 to 11, characterized in that the hinge points (29,31,35,37) of the seat and the control rod (25), respectively. (27) seen in the longitudinal direction by a certain distance offset from each other on the chassis (13) are arranged. 13. Aufrichtrollstuhl according to one of claims 1 to 12, characterized in that the chassis (13) comprises two side parts (45) which are interconnected via a strut (47). 4. Aufrichtrollstuhl according to claim 13, characterized in that a

a single side part (45) has a support profile (49) with an in the middle third of the support profile (49) projecting at an angle arm (53), or in which a Beinst sets (71) is movably arranged.

15. Aufrichtrollstuhl according to claim 14, characterized in that the

Leg support (71) via a connecting link with the erecting frame (19) is coupled such that when erecting the Aufrichtgestells (Ί9) the

Leg rest (71) is moved forward and down.

16. Aufrichtrollstuhl according to claim 14 or 15, characterized in that the leg support (71) on opposite sides each having a tube (73) which is guided in each case axially movable in a channel of the arm (53).

17. Raising wheelchair according to one of claims 14 to 16, characterized

18. Aufrichtrollstuhl according to one of claims 4 to 17, characterized in that the arm (53) at a distance from the front end on the support profile (49) is arranged. 19. Aufrichtrollstuhl according to one of claims 14 to 18, characterized in that the arm (53) projects at an angle between 30 and 60 degrees, preferably between 35 and 50 degrees from the support profile (49).

20 upright wheelchair with a chassis (13) and a seat (21) and a backrest (23) having Aufrichtgestell (19) which is pivotally hinged to the chassis (13), nd a legrest (23), which at

Transition is lowered from the sitting position in the erecting position on the ground, wherein the chassis (13) comprises two side parts (45) which are interconnected via a strut (47),

characterized,

a single side part (45) has a carrier profile (49) with one in the middle

Third of the support profile (49) projecting at an angle arm (53), on or in which a legrest (71) is arranged to be movable.

21. Aufrichtrollstuhl according to claim 20, characterized in that the

Leg support (71) via a connecting member with the Aufrichtgestell (19) is coupled such that when erecting the Aufrichtgestells (19) the

Leg rest (71) is moved forward and down.

22. Aufrichtrollstuh] according to claim 20 or 21, characterized in that the leg support (71) on opposite sides each having a tube (73) which is guided axially movable in each case in a channel of the arm (53).

23. Aufrichtrollsruhl according to one of claims 20 to 22, characterized in that the arm (53) has a downwardly projecting nozzle (89) for the attachment of the front wheels (15) is present.

24. AufrichtiOllstuhl according to one of claims 20 to 23, characterized in that the arm (53) at a distance from the front end on the support profile (49) is arranged.

25. Aufrichtrollstuhl according to one of claims 20 to 24, characterized in that the arm (53) at an angle between 30 and 60 degrees, preferably between 35 and 50 degrees from the Tr profile (49) protrudes.