FI122441B - Lifting Device - Google Patents

Abstract

The invention relates to a lifting device, which is intended in particular for use in connection with a wheelchair (p) or the like and which includes a seat part (1) movable in the height direction (h) of the wheelchair (p) or the like. In order to enable the use of the lifting device as a separate accessory, it includes a frame part (R) that is fixedly connected to the wheelchair (p) or the like by means of fastening members (K), to which the seat part (1) is connected at least movably in the height direction (h) via a lifting arrangement, such as a joint mechanism (3b) operated by mechanical, pressure medium-operated and/or electrically-operated actuators (3a).

Description

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The invention relates to a lifting device according to the preamble of the independent claim, which is intended in particular for use in connection with a wheelchair or the like.

The purpose of the lifting device is to facilitate the transfer of, for example, a wheelchair user to a bed such that the wheelchair can be raised by means of a lifting device, moved sideways and / or rotated about a vertical axis, e.g. 45 ° to 90 °.

For example, JP 2001070350 discloses a wheelchair actuator which enables a person in a wheelchair to be moved, for example, as described above. The actuator disclosed herein comprises a seat portion, a slider 20-pivoting the person, a pivotally-pivoting pivot mechanism, a lifting motor and a control device.

Further, KR 1020070098777 discloses an actuator in a wheelchair for moving a person from a wheelchair to a bed. The actuator comprises a seat member, a sliding structure for laterally moving the person, q an articulated lift mechanism for lifting a seated person,

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lifting equipment and control device.

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Further, US 5,669,620 discloses an actuator in a wheelchair for moving a person from a wheelchair to another seat. Presented in this context

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the solution comprises a seat member, a slider structure for laterally moving a person o> - 35, an articulating mechanism o 0X1 for lifting a seated person and a motor.

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All lift transfer arrangements disclosed in the aforementioned publications are completely integrated with the mechanisms provided in the wheelchair frame structures. the solutions are custom-built wheelchairs with lifting and transporting functions. It is not possible for a wheelchair user to make use of a selection of conventional wheelchairs according to his or her own preferences, e.g., in terms of wheelchair structures, materials and / or ergonomics. In addition, in all of the above solutions, the upward movement of the seat plane is accomplished with a conventional scissor joint, which results in an additional "scissor joint" underneath the seat portion of the wheelchair, which may present an unsafe safety risk.

It is further known from US 5,695,248 and JP 2003 052754 that, in order to enable the lifting device to be used as a separate accessory, it comprises a frame member movably coupled to a wheelchair or the like, to which the seat part is connected via a lifting arrangement such as mechanical, pressure or by means of a pivoting mechanism actuated by electrically actuated means, at least movably in height. Again, these solutions do not provide satisfactory implementations in terms of structure and usability.

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A lifting device according to the present invention

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The purpose of the present invention is to provide a decisive improvement on the above problems, and thus to substantially improve the state of the art. For this purpose, the lifting device according to the invention is characterized in that the linkage mechanism of the lifting system is arranged on a pivoting quadrant, comprising two pairs of consecutive pivot arms pivoting in a substantially vertical plane, 3 which causes the seat to move forward in the direction of rotation of the articulated arms while being raised upwards.

5 The main advantages of the lifting device according to the invention include the simplicity and reliability of its structure and operation, as well as the safe use of a wheelchair or the like equipped with it. Since the lifting device according to the invention is suitable as a retrofit accessory, there is no need to order a lifting and moving function, e.g. a complete wheelchair, but e.g. an existing wheelchair can be simply upgraded with a lifting device according to the invention with the most suitable functions first thanks to the pivot-angle principle that enables simultaneous forward and upward movement. In addition to the lifting movement, the lifting device according to the invention may further advantageously have a device base, e.g. It is possible to upgrade the wheelchair, for example, by removing the original seat platform and replacing it with, for example, screw-mounted or suitable quick-lock arrangements for the lifting device which can be detachably attached to the wheelchair structures. An additional advantage of the lifting device according to the invention is that, due to its removable function, the entire lifting device can easily be replaced or simply removed from one of the lifting devices due to the need for some function. otherwise, the lifting device still needs to be serviced by the hoist.

o you. The lifting device according to the invention thus also enables optimum implementation in terms of service and maintenance due to its interchangeability.

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Other advantageous applications of the lifting device according to the invention are disclosed in the dependent claims.

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In the following description, the invention will be illustrated in detail with reference to the accompanying drawings, in which: Figure 1 shows an example of a wheelchair suitable for use with a lifting device according to the invention; 10 Figure 2 shows a preferred embodiment of a lifting device according to the invention; and Figure 20 further illustrates, by way of example, a preferred embodiment of a lifting device according to the invention in side and top view.

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The present invention relates to a lifting device specifically adapted for use in connection with a wheelchair p or the like and comprising a wheelchair p or the like.

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seat part movable in relation to i with respect to height h.

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V 30 To enable the lifting device to be used as a separate h- · ° accessory, it includes a wheelchair p or a receiving member K with fixed means K) a movable frame R to which seat 1 is connected

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at least in the vertical direction h, by means of a pivot mechanism 3b used by means of a lifting arrangement ^35, such as mechanical, pressure intermediate eto and / or electric actuators 3a.

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In the lifting device according to the invention, the pivoting mechanism 3b of the lifting arrangement is arranged on a pivoting quadrant, whereby it comprises a pair of pivoting arms 3bl, 3b2 consisting of two successive pivoting arms w rotating in a substantially vertical plane.

Referring to the embodiments shown in Figs. with Nive-nicks on the outside

For example, in practice the lifting movement of the actuator 3al, which is pivotally coupled to the body R acting by an auxiliary power produced from the energy source 3a2, such as a spindle, cylinder, telescopic arm or the like, is typically about 150 to 250 mm , that the person sitting on the seat part 1 rises at least up to the armrests of the wheelchair p ^ of the type shown in Fig. 1. The above quadratic principle-

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Thanks to the articulated joint mechanism 3b, an additional "scissor joint" is avoided with the N joints of the articulation mechanism 3b h ° ° at the sides of the frame R and the seat portion 1c. Further, with particular reference to Fig. 2, the hinged angular function moves the seat part 1

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[Λ wheelchair p outward from the backrest while lifting it? 35 which facilitates the movement of a person in a wheelchair away from the wheelchair. Moving forwards stabilizes the wheelchair further as the center of gravity of the person to be lifted moves closer to the center of gravity of the wheelchair 6 between the rear and front axles. In normal mode, the center of gravity is typically very close to the front of the rear axle (which results in the risk of tipping over backwards, which however is easier to rewind thanks to the "lightening" of the front tires by shifting the center of gravity).

Referring further to the preferred embodiments shown in Figs. 2-4, a lifting arrangement coupled to the frame member 10 at its first end is coupled at its other end to a subframe 1a arranged in connection with the seat portion 1.

In a further preferred embodiment of the invention, with particular reference to Figure 3, the seat part 1 is further arranged to be substantially horizontally movable x. In this case, a movement arrangement 4 is provided between the seat part 1 and the subframe 1a, such as sliding rails, guide track arrangement or similarly acting counter surfaces 4a, 4b to allow movement x of the seat part 1 in horizontal plane.

Further referring to Figures 3 and 4, the seat part 1 is preferably arranged to pivot about a substantially vertical pivot axis. In this case, the seat part 1 consists of, for example, in height h, two overlapping parts 1 ', 1 "between which is arranged a rotation mechanism 5 to enable the rotation z of the seat part 1.

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Referring to the seat 4, the seat part 1 consists of a lower base 1 "provided with a second mating surface 4b and a central axis 5a of the movement arrangement 4 and a rotationally engageable seat surface 1 '. The bottom 1" is viewed from above preferably round,

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rotation z freely so that the bottom 1 "below the seat surface o ^ 35 is under no circumstances obstructing movement.

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A further preferred embodiment of the invention, with particular reference to Fig. 4, is a mechanical, pressure-medium and / or electric auxiliary actuators 4c and / or 5b for actuating the rotation mechanism 5 of the movement arrangement 4 and / or 5. Further, the lifting device is preferably provided with control means 6 for actuating auxiliary power actuators such as pressure medium and / or electric actuators and / or auxiliary actuators 3a, 4c and / or 5b. Ko. the control elements 6 to 10 are further preferably carried out in accordance with the principle of remote operation, as shown in Fig. 4, by a wired controller, such as a wire detachable controller, and / or wirelessly, such as an optical and / or radio frequency controller.

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It is to be understood that the invention is not limited to the embodiments described or described above, but that it can be modified in many ways within the scope of the basic idea of the invention depending upon, for example, the particular platform in which the lifting device is used. First of all, the attached drawings do not describe in detail the fastening means for connecting the lifting device to the wheelchair or similar seat base, since their implementation depends on the support structures of the seat base. In this respect, it is possible, for example, to provide the lifting device with fastening means operating, for example, with a quick-locking principle, for example, to facilitate connection of the wheelchair. It is also clear

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that the lifting device according to the invention can be utilized with any type of seat, l '' - °, which is intended in particular to facilitate the upward movement of a person seated therein. One such application could be suitably modified, e.g.

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car seat. It is also naturally possible to implement the articulation mechanism of the lifting device according to the invention 0X1, for example with a conventional scissor lift itself, in addition to which the seating part can be provided e.g. with retractable or opening side guards (covering the area between the armrests and the seating part) with armrests and / or backrest, etc.

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Claims (9)

A lifting device comprising a seat (1) specially adapted to be used in connection with a wheelchair (p) and having, in order to enable the lifting device to be used as a separate accessory, a chassis (p) movably coupled to the wheelchair (p) or the like. R) to which the seat part (1) is connected via a lifting arrangement, such as by means of a pivoting mechanism used at least in the height (h) by means of mechanical, pressure-acting and / or electrical actuators (3a), characterized in that the pivoting pivot mechanism (3b) This includes a pair (3bl, 3b2) of two consecutive articulated arms (3bl, 3b2) that rotate in a substantially vertical plane in the same direction, causing the seat member (1) to move forward in the rotational direction of the arms while being raised upwards. Lifting device according to Claim 1, characterized in that the articulation mechanism consists of two pairs of articulated arms (3bl, 3b2) connected by means of articulations (N) substantially on opposite sides of the frame (R), viewed from above by means of articulations (N). δ c \ i Lifting device CM V 30 according to claim 1 or 2, characterized in that the first end has a frame. The articulation mechanism (3b) coupled to the part (R) is connected g at one end to an auxiliary frame (1a) arranged in connection with the seat part (1). (M tn tn T- 35 Lifting device according to Claim 3, characterized in that the seat part (1) is arranged substantially horizontal (x), characterized in that a movement arrangement (4) such as a sliding rail, a guide track is arranged between the seat part (1) and the subframe (1a). or similarly acting counter surfaces (4a, 4b) to allow horizontal movement of the seat member (1). 5 Lifting device according to one of the preceding claims 1 to 4, wherein the seat part (1) is arranged to pivot about a substantially vertical axis of rotation (z), characterized in that the seat part (1) consists of two overlapping parts (1 ', 1 " ) between which is provided a rotation mechanism (5) to enable rotation (z) of the seat part (1). Lifting device according to Claim 5, characterized in that the seat part (1) consists of a base (1 ") with a second counter surface (4b) of the movement arrangement (4), which is preferably round from above, and rotatably connected thereto (z). seat-2 0 from the surface (1 '). Lifting device according to one of the preceding claims 1 to 6, characterized in that it is provided with mechanical, pressure medium and / or electric auxiliary actuators (4c and / or 5b) for actuating the movement arrangement (4) and / or the rotation mechanism (5). Lifting device according to one of the preceding claims 1 to 7 (M 4, characterized in that control means (6) are provided in connection therewith "7" 30 for auxiliary actuators, such as pressure medium and / or electric g and / or auxiliary actuators (3a, 4c). and / or 5b) for use in service CM LO LO O ί- 35 Lifting device according to Claim 8, characterized in that the control elements (6) are arranged to operate remotely from a wired or wireless, such as optical and / or radio frequency.