EP3453372A1 - Scissor lift system for a bath lift - Google Patents

Abstract

The present invention relates to a Hubscherensystem for bath lifter, comprising a bottom plate and a cover plate and arranged between these Hubscherenarme, wherein ends of the Hubscherenarme are each movably guided guided in guides arranged on the bottom or cover plate and wherein the equi-oriented ends of two mutually horizontally spaced Hubscherenarme are formed interconnected by a shaft, wherein to solve the problems of the prior art, the guides are each designed as a rack and the shaft has a toothing in each case in the region of a shaft end.

Description

The present invention relates to a Hubscherensystem for bath lifter, comprising a bottom plate and a cover plate and arranged between these Hubscherenarme, wherein ends of the Hubscherenarme are each movably guided guided in guides arranged on the bottom or cover plate and wherein the equi-oriented ends of two mutually horizontally spaced Hubscherenarme are formed interconnected by a shaft.

Bath tub lifters offer many people with physical disabilities an accident-free and painless way of personal hygiene. It is essential that the bath lifts are designed so that they allow a comfortable and safe operation. Restless, fluctuating movements of the lifter, which are caused by soft materials and lacking stabilizing connections and guides, lead to injury hazards and an unsafe feeling in the user, they must therefore be counteracted.

The Hubscherensystem such a lifter allows a change in distance between the bottom and top plate, which usually carries a seat or is designed as such. The drive for this is usually arranged in a backrest and drives one or more gears, which run on a vertical, attached to the bottom plate or hinged rack. To stabilize this vertical movement, scissors are used, the ends of which are each guided horizontally in the bottom and top plate. Although this guide limits the movement of the scissor arms outward, but not prevent rotation of the Hubscherenarmenden each other. That leads to strong lateral tilting movements of the cover plate under load, which gives a user a sense of insecurity.

The object underlying the present invention is therefore to provide a safe Hubscherensystem.

This object is formed in a Hubscherensystem for bath lifter, comprising a bottom plate and a cover plate and arranged therefrom Hubscherenarme, wherein ends of the Hubscherenarme are each movably guided in arranged on the bottom or top plate guides and wherein the equi-oriented ends of two mutually horizontally spaced Hubscherenarme formed by a shaft connected to each other, achieved in that the guides are each formed as a rack and the shaft each having a toothing in the region of a shaft end.

The Hubscherensystem invention has a bottom and a cover plate, which may be made in particular of plastic. Alternatively, other materials can be used, however, plastic proves to be particularly advantageous due to the low price and the satisfactory stability and water resistance. According to the invention, the cover plate has a seat recess in which the user finds place. Alternatively, a seat may be attached by fastening means on the cover plate, so that such a seat recess is not necessary. Also known in the art guides are essential for the Hubscherensystem invention, the lifting arms are slidably mounted in the guides movable. The Hubscherensystem invention has a connection axis between two equally oriented, displaceable with respect to the plates Hubscherenarmen, ie front bottom and front top. The shaft can according to the invention at any height of Hubscherenarme be arranged according to the invention, but a wave to the sliding on the bottom and / or top plate, or along Hubscherenarmenden is particularly advantageous, which has the smallest possible distance to the bottom or top plate. As a result, the shaft itself can at least partially be used for guidance on the floor and / or cover plate. For this purpose, it is provided with great advantage that the shaft in the region of the respective shaft ends has a toothing, which is guided in each case engaging in a trained as a rack guide the bottom and / or cover plate and at this unrolling. Due to the interlocking serrations, the scissor arms are resistant to undesired rolling, for example due to material deformation, but also to a certain extent against displacement in the direction vertical to the shear direction. This leads to a positive, non-shiftable and rigid guidance of the lifting scissor arms in the guides, a tilted position of the cover plate is avoided with great advantage. The teeth can be one or more pieces with the shaft, it can be formed as Anformung or as a gear or gear section.

In an embodiment of the invention is advantageously provided that the teeth is incorporated in the shaft. A shaft designed in this way is uncomplicated and correspondingly inexpensive to produce. The shaft is movably guided in the racks, wherein the teeth incorporated in the shaft are engaging in the recesses of the racks. The shaft is rotatably mounted in the Hubscherenarmen, so that the shaft when rolling out or retracting the scissors along the racks is unrolled. It is ensured by such a configuration that both sides of the shaft are unrolled simultaneously, so that the cover plate is evenly raised or lowered even with one-sided loads. Of particular advantage is when the ends of the scissors arms rest on the bottom plate and on this are slidably mounted, while the shaft with the toothing only in the racks engaging, but not resting on this. As a result, an increased life of the teeth and rack and a simple rolling with minimal friction are guaranteed.

Alternatively, it is provided in a further development of the invention that the toothing is designed as at least one gear and rotatably connected, in particular form-fitting manner with the shaft. Due to the rotatably mounted on the Hubscherenarmen the gears according to the invention are mounted the same on both sides, so that a uniform rolling of the gears allows and even with a one-sided load of the system, a uniform lifting or lowering of the cover plate is possible.

Of particular advantage in the present invention, when at least one wheel is provided in each case at least one rolling wheel, in particular with this one piece, wherein the rolling wheel is rotatably connected to the shaft. It is inventively provided that the rolling wheel transmits the force acting on the cover plate load on the lifting arms on the bottom plate, while the gear engages the rack. It is crucial that the gear is relieved from just this load to ensure increased life of the gear and the rack and a simple rolling with the least possible friction. The rolling wheel can be designed to be rollable directly on the bottom and / or top plate or in a guide groove incorporated therein. Accordingly, the difference in diameter between the rolling wheel and gear to be adjusted so that the load is carried by the rolling wheel and the gear is in the rack cross. According to the invention it is particularly advantageous if the gear wheel and the rolling wheel are in one piece, but other connections between gear and rolling wheel are also according to the invention. A separate from the gear rotatably securing the rolling wheel on the shaft is provided according to the invention.

In a further development of the invention, it is provided that at least one toothed wheel is formed guided in a fork-shaped end of a Hubscherenarms. As a result, an axial displacement of the gears is counteracted to the shaft. Overall, the Hubscherensystem is significantly stabilized by this design and much more pleasant for the user, especially as horizontal instabilities is counteracted.

It is further proposed an advantageous embodiment of the invention, according to which the rack is integrally connected to the bottom and / or cover plate, in particular in this is formed. In particular, in the production of floor and / or ceiling plate, the invention is significantly cheaper and easier to implement by such a configuration.

Furthermore, it is provided in an embodiment of the invention that the rack formed as a separate part and insertable in a corresponding receptacle of the respective plate possibly also umspritzbar, and consists of a material which is selected from the group: plastics, in particular PA or POM, metals and alloys. According to the invention, a rack designed in this way is inserted into a corresponding recess in the base and / or cover plate and connected to it in a material or form-fitting manner. It is advantageous that the material of the rack does not have to correspond to that of the bottom and / or top plate. Rather, a material which is more resistant to friction can be used here for reasons of stability and wear.

Of particular advantage in the present invention is when the shaft is absorbing torsional forces and / or is formed from a metal. As a result, a rotation of the lifting arms and thus the cover plate is prevented in relation to the bottom plate. Also, a shift in the shear direction, for example, by material deformations is counteracted because the scissor arms are firmly coupled together in the shear direction and the forces in the shear direction are largely evenly distributed evenly with an uneven weight distribution on the cover plate or on the seat located thereon on both scissor arms.

In a further development of the invention is also provided that the shaft is polygonal in cross-section, in particular four- or hexagonal. Such a design of the shaft allows a simple attachment and detachment of the gears and rolling wheels, which are so rotatably connected without further fasteners with the shaft.

In a further development of the invention it is provided that the guides on the bottom and / or cover plate are additionally designed as a handle for a shaft end. Such guides prevent jumping out of the shafts from the racks in shakings or shifts and ensure a constant adjustment, after which the shaft is engaging at both shaft ends in a toothing at the same height. Such a guide also acts against unusually high force peaks on the scissor arms, as they can occur, for example, in case of faulty loads. The rack may be mounted at one or both Umgriffen on the opposite side of the bottom or cover plate side of the Umgriffs.

Furthermore, it is provided in an embodiment of the invention that the lifting arm arms are designed as equal parts. Common parts simplify the design and manufacture as well as the storage.

In a further embodiment of the invention, it is provided that the lifting scissor arms are formed from a plastic, for example a PA with glass fiber. These are sufficiently stable and waterproof.

Finally, according to the invention, it is also proposed to arrange the lifting arm arms of one side against one another on a common connecting axis in their middle region in such a way that the lifting arm arms of one side are formed adjacent to each other at a common connecting axis in their middle region, such that a distance between the mutually facing sides of the respective one Stroke arms is less than 1 mm, in particular significantly less than 1 mm. Such a configuration serves to further stabilize the Hubscherensystems, especially in the horizontal direction and especially in only slightly or half extended state, since in such a state, such a large overlap of the Hubscherenarme is present that the mutually overlapping surfaces due to the small distance without larger Deformations can support each other under high loads.

The object underlying the invention is also solved by a bath lifter, comprising a Hubscherensystem according to the foregoing descriptions.

The invention will be described by way of example in a preferred embodiment with reference to the following figures, wherein further advantageous details are shown in the figures. Functionally identical parts are provided with the same reference numerals.

Figur 1:

Schematische Ansicht des Hubscherensystems;

Figur 2:

Seitenansicht eines Wellenendes und der Führung gemäß einer ersten Ausführungsform;

Figur 3:

Seitenansicht der Welle gemäß zwei verschiedenen erfindungsgemäßen Ausführungsformen;

Figur 4:

Seitenansicht eines Endes eines Hubscherenarms gemäß einer erfindungsgemäßen Ausführungsform.

The figures show in detail:

FIG. 1:

Schematic view of the Hubscherensystems;

FIG. 2:

Side view of a shaft end and the guide according to a first embodiment;

FIG. 3:

Side view of the shaft according to two different embodiments of the invention;

FIG. 4:

Side view of an end of a Hubscherenarms according to an embodiment of the invention.

FIG. 1 shows a schematic view of a Hubscherensystems 1 according to a first embodiment of the invention. The lifting arms 4 are designed so that they are the distance between the bottom plate 2 and cover plate 3, which according to the invention may have a seat recess, are changing. In this case, the rear ends 5 of the lifting scissor arms 4, shown in the right-hand half of the figure, are rotatably fastened to the base 2 and the cover plate 3, so that a proper shearing movement is possible. Accordingly, the other, front ends 5 of the lifting arms 4 are slidably mounted. In order to prevent a shift vertically to the shear direction, guides 6 are provided on the sides of the bottom 2 and the cover plate 3 according to the invention. It is further provided that the four front ends 5 of the lifting arms 4 are connected in pairs by a shaft 7, wherein the shaft 7 is rotatably mounted at the ends 5 of the lifting arms 4. As a result, the lifting-arm 4 are connected to each other so that a power transmission is performed as evenly as possible on both sides. It is an advantage when the shaft 7 is formed of a metal and torsional forces is received, so that a rotation of the Hubscherensystems 1 prevents and a uniform raising and lowering of the system 1 is possible. Furthermore, it is advantageous if the toothings 10 are located on both sides of the shaft 7 in the same position, so that torsional forces are prevented on the lifting arms 4, which could cause a permanent rotation or distortion of the lifting arms 4. According to the invention it is further provided that at least one rack 8 is arranged on the bottom plate 2 and / or on the cover plate 3, in which a toothing 10 is engaging on the shaft 7. So further slipping and twisting of the system 1 is prevented. According to the invention, it is particularly advantageous if two toothed racks 8 are arranged both on the base plate 2 and on the cover plate 3, ideally on the shaft ends 9 and the guides 6 FIG. 1 illustrated embodiment, these guides 6 are configured as Umgriffe 13, which prevent leakage of the teeth 10 of the shaft 7 from the rack 8 and thus an unintentional adjustment of the position of the system 1. The toothing 10 can take various forms according to the invention. Thus, the teeth can be incorporated according to an embodiment in the shaft 7. In this case, the machined in the shaft 7 teeth 10 may be present only in the shaft ends 9 or as trained on the entire width of the shaft 7 teeth 10 may be formed. Alternatively it can be provided according to a further embodiment that the toothing 10 is formed as a plugged onto the shaft 7, or otherwise attached thereto gear 12. Thus, the gear 12 according to the invention may be integral with the shaft 7. In order to relieve the gears 12 and thus to ensure a longer life and a frictionless rolling of the gears 12, the ends 5 of the lifting arms 4 can be formed be that they are slidably mounted on the bottom 2 and / or cover plate 3, for example in a guide groove 17. To enable the shearing movement of the lifting arms 4, the lifting arms 4 in the central region 15 has a recess for each connection axis 14, which in each case the two lifting arms 4 of a page are interconnected. The reference numeral 16 denotes the distance between the paired Hubscherenarmen 4, which is inventively kept as low as possible. The racks 8 on the bottom plate 2 and the cover plate 3 are advantageously arranged so that they do not reach to the edge of the bottom 2 and top plate 3 but rather are reset, since so possible injuries are prevented by pinching the hands in the guide 6 When the system 1 is in the retracted state, the element containing the toothing 10 does not extend to the front edge of the floor 2 or cover plate 3, so that even when gripping the floor 2 or cover plate 3 by an operator's hand do not reach 10 teeth. According to the invention, however, such a positioning of the rack 8 in the bottom plate 2. In addition, further side flaps can be provided, which are covering the area of the guides 6 and racks 8.

FIG. 2 shows a side view of a shaft end 9 and the guide 6 according to a first embodiment. More specifically, here the shaft end 9 and the guide 6 are shown on the bottom plate 2, wherein the cover plate may have a same arrangement. The guide 6 is also designed here as Umgriff 13. Alternatively, the guide 6 represent a simple side wall, while the rack is arranged on the bottom 2 or cover plate 3. The rack 8 is in the in FIG. 2 shown embodiment, not on the bottom plate 2, but rather on the bottom plate 2 opposite side of the wrapper 13 is arranged. By such an arrangement, the toothing 10 at the Shaft 7 are freed from a compressive load, which could otherwise be present by an arrangement of the rack 8 on the bottom plate 2. This relieves the teeth 10 and the rack 8, so that with less abrasion / wear is expected. Accordingly, the load is as in FIG. 2 seen on the end of the 5 scissor arms 4, which are movably mounted in an incorporated in the bottom plate 2 and cover plate 3 guide groove 17. In the embodiment shown here, the shaft 7 or shaft 11 is equipped with a gear 12 which is mounted engaging in the rack 8. It is particularly advantageous if the lifting-scissor arms 4 are connected to one another in such a way that the smallest possible distance 16 between the lifting-scissor arms 4 prevails. Advantageously, this is accomplished according to the invention by one-piece scissor arms 4, which are identical to each other. Furthermore, such a design is made possible by weakening or even canceling out the torsional forces. This advantageously saves space and reduces the likelihood of jamming.

FIG. 3 shows a side view of the shaft 7 according to two different embodiments of the invention. The upper embodiment provides gears 12 with serrations 10, which are pushed onto the shaft ends 9. According to the invention, it is then particularly advantageous if the shaft 7 is polygonal in cross-section, in particular hexagonal or quadrangular, since such a simple pushing on a shape of the gear 12 corresponding to the shaft 7 produces a simple rotational connection between shaft 7 and gear 12 , In this case, the teeth 10 from the shaft 7, as it is in FIG. 3 in an axial sectional view can be seen. As an alternative to the gear, it is according to the invention that the toothing 10 is incorporated into the shaft 7 as in the second embodiment shown here. In this case, the teeth 10 may be incorporated only in the shaft ends 9, or but over the entire length of the shaft 7 to be extending. As can be seen in the axial sectional view, the toothing 10 in this example has the same maximum radius as the shaft 11.

FIG. 4 shows a side view of an end 5 of a scissor arm 4 according to an embodiment of the invention. While the ends 5 of the lifting arms 4 in the in Figures 1-3 were guided in a rail and the serrations 10 were guided in the form of gears 12 unloaded in the racks 8, the Hubscherensystem 1 in the in FIG. 4 shown embodiment supported by the rolling wheel 11, which is designed to be movable in the guide groove 17. It is according to the invention that the rolling wheel 11 and the gear 12 are in one piece or are interconnected. Also, a connection only via the common coupling by the shaft 7 is according to the invention. It is envisaged that both gear 12 and roller 11 are rotatably connected to the shaft 7, so that the rolling wheel 11 is mounted rolling in the guide groove 17, while the gear 12 is continuously stored in the rack 8. The teeth 10 engages in the rack, while the lifting arms 4 roll through the teeth 10 and running in the rack 8 gear 12 on this. According to the invention, the end 5 of the lifting scissors arms 4 is fork-shaped, so that the gear wheel 12 and the rolling wheel 11 are received therebetween and penetrated by the shaft 7. The shaft end 9 can protrude depending on the type of attachment of the shaft 7 at the end 5 of the Hubscherenarms 4 of the fork. Alternatively to the in FIG. 4 illustrated embodiment, in which the rolling wheel 11 is formed larger diameter than the gear 12, and the gear 12 depending on the design of the bottom 2 and / or cover plate 3 and the rack 8 diameter larger than the rolling wheel 11 or both of the same diameter have as long Ensuring the associated running thread height ensures that the load from the rolling wheel 11 worn. It is inventively provided only that the load is carried by the rolling wheel 11 and the gear 12 nachwievor in the rack 8 is cross.

LIST OF REFERENCE NUMBERS

1

Hubscherensystem

2

baseplate

3

cover plate

4

Hubscherenarm

5

end up

6

guide

7

wave

8th

rack

9

shaft end

10

Perforation

11

scroll wheel

12

gear

13

throwing

14

connecting axis

15

mid-range

16

distance

17

guide

Claims (14)

Hubscherensystem (1) for bath lifter, comprising a bottom plate (2) and a cover plate (3) and arranged between these lifting arms (4), said ends (5) of the lifting arms (4) in each case on the bottom or cover plate (2, 3) arranged guides (6) are designed to be movably guided and wherein the equi-oriented ends (5) of two mutually horizontally spaced Hubscherenarme (4) by a rotatably mounted shaft (7) are interconnected, characterized in that the guides (6) respectively as toothed rack (8) are formed and the shaft (7) in each case in the region of a shaft end (9) has a toothing (10). Hubscherensystem (1) according to claim 1, characterized in that the toothing (10) in the shaft (7) is incorporated. Hubscherensystem (1) according to claim 1, characterized in that the toothing (10) is designed as at least one gear (12) and rotatably, in particular form-fitting manner with the shaft (7) is connected. Hubscherensystem (1) according to claim 3, characterized in that at least one gear (12) at least one rolling wheel (11) is provided, in particular with this one-piece, wherein the rolling wheel (11) rotatably connected to the shaft (7) , Hubscherensystem (1) according to one of the preceding claims, characterized in that at least one gear (12) in a fork-shaped end (5) of a Hubscherenarms (4) is formed guided. Hubscherensystem (1) according to one of the preceding claims, characterized in that the rack (8) with the bottom (2) and / or cover plate (3) is integrally connected. Hubscherensystem (1) according to one of the preceding claims, characterized in that the rack (8) is formed as a single part and consists of a material which is selected from the group: plastics, in particular PA or POM, metals, in particular aluminum, rubbers. Hubscherensystem (1) according to one of the preceding claims, characterized in that the shaft (7) torsional forces is receiving and / or is formed of a metal. Hubscherensystem (1) according to one of the preceding claims, characterized in that the shaft (7) in cross-section polygonal, in particular four- or hexagonal is formed. Hub shear system (1) according to one of the preceding claims, characterized in that the guides (6) are additionally designed as a handle (13) for a shaft end (9). Hub shear system (1) according to one of the preceding claims, characterized in that the lifting scissor arms (4) are designed as identical parts. Hubscherensystem (1) according to one of the preceding claims, characterized in that the lifting scissor arms (4) are formed of a plastic, for example a PA with glass fiber. Hubscherensystem (1) according to one of the preceding claims, characterized in that the lifting arms (4) of one side on a common connection axis (14) in its central region (15) are formed adjacent to each other in such a way that a distance (16) facing each other Pages of the respective lifting arms (4) is less than 1 mm, in particular significantly less than 1 mm. Bathtub lifter, comprising a lifting shear system (1) according to one of the preceding claims.

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