JPH09253140A - Back support device for lift for bathroom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a device to allow adjustment operation in which it can be moved from a support inclination position to a flat position, and vice versa, by a simple means, and by hands of a physically handicapped person by himself. SOLUTION: In a back support device 20 for a lift for a bathroom provided with a seat back 24 pivotally installed to be supported by rotary arms 28, the rotary arm 28 is provided with a runner 32 laterally protruded to be engaged in a groove way 34 of a T-web plate 36 on the seat back 24. An adjacent bypass track part 54 to form a track loop provided with an inverse lock stopping device 56 is formed at a lower part of a groove way part 48 extended along length. The seat back 24 is rotated forward to exceed its inclination position for only a little, and then it is pushed to return to its support inclination position. By subsequent release rotation forward, the rotary arm 32 exceeds the inverse lock stopping device 56 to get into the bypass track part 54, so that the seat back 24 can be released by rotation to a flat position downward. The seat back 24 can thus be safely and easily moved by a pysically handicapped person himself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back support device for a bathroom lift having an underframe, a seat plate, and an interposing lifting frame having a lifting mechanism, and the back support device is the seat plate. There is a back plate member that can be arranged and fixed on the top, and is pivotally mounted on the bottom plate member, and there is a backrest that can rotate from an inclined position to a flat position downwardly and rearwardly about the first horizontal axis. And a supporting member mounted on a T-web plate protruding from the back surface of the backrest to support at least the inclined position.

[0002]

BACKGROUND OF THE INVENTION A back support of this kind is known from EP-A-062042A. The support member includes a hose portion that can be filled with pressurized water. Another manually operated control valve is required for filling and withdrawing the hose section.

[0003]

A simpler back support in which a latch device is incorporated in a pivot bearing of a backrest capable of fixing the backrest in various positions that are finely and stepwise inclined is disclosed in European Patent No. It is well known from 0347652B. The backrest must be moved in the direction of the pivot axis against the spring to release the latch device.
This operation of releasing the latch can certainly be performed by the caregiver, however, this operation is rarely performed by a disabled person sitting on the seat board.

The tilt cam formed on the side surface of the seat can set at least two different tilt angles, and a back support device which helps guide the backrest so that the backrest can be completely folded forward and backward. It is disclosed in Japanese Patent Publication No. 0578947A. Latch the backrest in the tilted position. In order to unlatch the backrest, it must be lifted so that it can be moved to another tilted position or one of the flat positions. The caregiver's help is also usually required for this unlatching operation.

The object of the present invention is to allow a back support of the type mentioned at the beginning of this specification to be moved by simple means from a support tilt position to a flat position and vice versa, and vice versa. Is to improve this adjustment operation so that you can do it with your own hands.

[0006]

The object of the invention is to use a spine support of the type mentioned at the beginning of the present description, in which the T-web plate is arranged in a vertical plane, at a right angle to the backrest, And providing a guideway with which a runner disposed on the upper portion of the rotating arm engages; a second portion of the rotating arm disposed on the bottom plate member at a specific distance from the first horizontal axis. Pivotally mounting about the transverse axis of; the lower portion of which the guideway has a track portion extending at least substantially along the entire length of the backrest, which has a bypass track portion forming a track loop. It can be achieved by providing parts. The track loop is formed by connecting the lower ends of the long track portion and the bypass track portion together to form a connecting track portion, and the bypass track portion separates the long track portion from the connecting track portion in an appropriate vertical direction. And rejoin and design the non-return stop at at least one confluence.

The rotating arm constitutes the supporting member. If you move the backrest to a more upright position,
The rotating arm pivots upwards and forwards, with which the runner slides down the long track portion of the guideway downwards until it reaches the connecting track portion. Once the runner reaches a stop at the front of the connecting track portion, the rotating arm supports the backrest in a tilted position. In order to adjust the backrest from this tilted position to the flat position, it rotates the backrest forward, so that the runner moves to the rear of the connecting track part and the non-return stop device. It only has to be temporarily suspended so that it can pass over and enter the bypass truck section. The backrest turns here backwards without any obstruction into a flat position,
It is supported by touching the wall of the bathtub. In this process, the runner of the rotating arm passes through the bypass track portion and enters the long track portion at its upper junction. Above this upper confluence, that is, at the position where the long track portion branches into the lower portion and the bypass track portion, the runner moves downward as the backrest is lifted and the backrest is lowered. As it is moved, it moves upward. In the lower part of the long track part, the runner can only move downwards, and in the bypass track part, it can only move upwards.

According to one embodiment of the present invention, the upper portion of the long track portion is unconstrained and the backrest is supported by a bottom plate member or a lift seat plate. A further refinement of the invention is to insert a machine stop into the guideway and lock it against displacement by means of a push-fit clamping means, so that the backrest achieves a specific flat position at a defined angle. Therefore, the runner supports the rotary lever on the backrest via the mechanical stopping device. Preferably, the mechanical stop has a plate-like design to engage laterally aligned slots in the guideway. Several sets of slots can be arranged in a narrow longitudinal direction at intervals to achieve a fine stepwise adjustment of the flat position of the backrest.

In the simplest case, the lower part of the long guideway, together with the bypass track part and the connecting track part, forms a substantially parallelogram-shaped or substantially rectangular arrangement, in which the individual track parts are not always required. You don't have to run in a straight line. By selecting the track merging device at the junction appropriately, when the runner passes through the merging point of the track, it will always be in the required track part even if there is no non-stop device there as long as its operating cycle continues. It can be inserted surely. The installation of some non-return stop devices will undoubtedly also achieve this purpose.

According to a further refinement of the invention, the runner can be designed as a compression spring biased pin. The guideway then consists of a slot device and the non-return stop device is designed in the form of a shoulder at the bottom of the slot. The slot bottoms of the main part of the slot arrangement are in a common plane in this example, and each shoulder is placed in front of an upwardly rising slope. Each shoulder provides a step surface that runs at least approximately perpendicular to the bottom of the slot, the surface being flush with the side surface of the connecting track portion.

When the runner is arranged at the connecting portion, the end point of the connecting track portion forms a straight line, and an included angle of up to 45 ° is formed at the longitudinal centerline of the rotating arm. In the preferred embodiment, this angle is less than 10 degrees.

Finally, a further refinement of the invention provides the long track portion joining at its bottom a short end angled with respect to the backrest, at the junction of which a first non-stop stop is arranged. To do. This end is in turn joined to the connection at the appropriate angle and a non-return stop is also placed at its second junction. Preferably, the short end forms a right angle with the long track portion. This ensures that even a slight upward movement of the backrest will automatically and reliably move once it enters the short end of the long track portion. A temporary rearward movement of the backrest then moves the runner to the front end of the connecting track portion, which supports the backrest in its inclined position.

The tangent line of the bypass track portion at the junction with the connection track portion forms an angle of 90 ° or more with the extension of the center line of the rotary arm when the runner is arranged at this junction. This angle need only be slightly above 90 ° to prevent clogging.

A particularly advantageous feature of the invention is that when the backrest is moved downwards, one of the two rotary shafts, preferably coaxial with the rotary arm shaft, is arranged with a loaded leg spring, The biased spring force is sufficient to return the released backrest to at least its tilted position. Thus, the disabled person only needs to raise his upper body from a recumbent position, with the built-in spring then the backrest to follow. The backrest either voluntarily finds its tilted position or reaches this position when the seated person's back is placed against the backrest. When a person with a disability lifts the seat of the lift,
Since the backrest provides a safe and reliable support tool, a person with a disability can perform a simple release process to lower the backrest to the flat position. In this case, the backrest is moved slightly forward until the runner on the rotating arm passes the check stop measure. This releasing action applied to the backrest is particularly easy to implement if a person with a disability is provided with an auxiliary operating lever for directing his / her attention so that he / she only has to push it down. This operating lever should be installed by pivoting it on the side of the backrest as much as possible, and if necessary, it should be turned into the operating position determined by the mechanical stop device, or else it should be hidden behind the backrest position. Just put it behind the front of the lean.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The main components of the bathroom lift according to FIG. 1 are an underframe 10, a seat plate 14, a guide frame 16 and a hydraulic hoist 18 which can be filled with pressurized water. A detachable back support 20 is attached to the seat plate 14. The back support 20 is provided at the front with a bottom plate 22 on the seat plate 14 and a backrest 24 pivotally mounted about a first lateral axis 26. The plate-shaped rotating arm 28 is the bottom plate 2
2 is pivotally mounted about the second transverse axis at the rear of the two and engages with two externally provided coaxial pins 32 in grooves 34 respectively formed in the two T-web plates 36. , Which are sequentially formed integrally with the back surface of the backrest 24 or attached to the back surface.

According to FIG. 3, the groove 34 has a stepped cross section with a shoulder 38 formed adjacent to the recess forming the bottom of the slot. The runner 32 provides a sleeve 42 that projects laterally from the plate-shaped rotary arm 28 and enters the channel 34 and engages to the shoulder 38. A sliding pin 44, which is pressed outward by a spiral compression spring 46, is mounted in the sleeve 42, and an end surface of the pin 44 is set in the slot bottom portion 40 of the recessed slot portion.

The groove 34 extends substantially along a backrest 24 which is closely adjacent and parallel to the back surface of the backrest.
A long track portion 48 of the. This long track portion 48 has its lower portion slightly angled rearwardly, with its adjacent short end 5 at a right angle.
Make a space for 0. The end of this end 50 becomes the connecting track portion 52 and the long track portion 48.
With said angled end 50 of about 45 °. The end of the connecting track portion 52 is the backrest 24.
Away from the bypass track portion 54, which, apart from a slight bend, has the long track portion 48.
Extend along and join it at an acute angle. At the end of each track portion, ie where each track portion joins the next track portion, the slot bottom 4
Shoulder 5 extending down to 0 and placed in front of slope 60
A check stop device 56 consisting of 8 is provided.

As the backrest 24 is raised from the flat position shown by the broken line in FIG. 9, the two runners 3 are
2 is a long track portion 4 of the two slot devices 34
Slide down 8 In the area of the slope 60 at the front of the first non-return stop 56, the pin 44 engages the sleeve 42.
And then tighten behind the shoulder 58 at the recessed portion of the angled end 50. The backrest 24 is thus prevented from moving further upwards.
A slight downward movement of the backrest results in the runner 32 overriding the second non-return stop 56 at the upper end of the connecting track portion 52, and thus the inclination of the backrest 24. The position is decided. In order to return the backrest 24 to its flat position, it is necessary to first perform the releasing movement toward the front. This causes the two runners 32 to move to the bottom of the connecting track portion 52, over the third non-return stop 56, and then into the starting point of the bypass track portion 54. This therefore limits the forward release movement of the backrest 24. The backrest can then rotate rearwardly so that the runner 32 moves up the bypass track portion 54 and past the fourth non-stop stop 56 before entering the long track portion 48. Slide upwards.

Essentially what is needed is one of the track portions 48, 50, 52, 54, or a portion thereof, when the runner 32 enters each of these portions. 28 does not extend at a right angle. It is also important for the lower end of the bypass track portion 54 according to FIG. 4 that the rotary arm 28 be at a very steep angle. The distance between the two transverse axes 26, 30 is relatively large so that the runner is
When making a more horizontal position with respect to the rotating arm 28 when in the lower part of the, the angle between the rotating arm 28 and the bypass track portion 54 must always be obtuse to prevent clogging of the device. As such, it is necessary that the bypass track portion 54 be steep at least at its ends, that is, substantially parallel to the backrest 24.

Of course, it is not necessary to provide a check stop at each confluence as shown. Due to its weight, once the runner 32 reaches the lower portion of the long track portion 48, the plate-shaped rotary arm 28 tends to rotate in the backrest direction in any case. In the case where the rotating arm 28 is additionally provided with a return spring for applying a rotating torque acting in the same direction as the pulling force due to gravity, the first non-stop stop device at the ends of the track portions 48 and 50 and 54 It is not necessary to provide 56. Only a non-return stop 56 at the confluence between the connecting track portion 52 and the bypass track portion 54 is required.

7 and 8 show a somewhat modified groove 34 in which the long track portion 48 is directly joined to the connecting track portion 32 without the angled end 50. Although the groove 34 thus makes the design simpler, when the backrest 24 is raised it can no longer be stopped automatically, but rather the runner 32 is brought into the bypass track portion 54. Until it enters, it will continue to move upwards, making it somewhat difficult to use. However, this is easily prevented as the pin 44 of the runner 32 engages an audible click stop in the slot recess when the non-return stop 58 is overcome at the end of the elongated track portion 48. The user thus receives an audible signal indicating the end of upward movement of the backrest 24, so that the runner rotational movement is immediately reversed to cause the runner to extend upward in the extension of the connecting track portion 52. Can be put in. This extension, designated by 52 ', is used for the rotary arm 26.
Is a safety measure for preventing the backrest 24 from being accidentally released when the backrest 24 is slightly rotated.

[0022]

As described above, according to the present invention, the supporting position of the conventional back support can be adjusted and operated by the handicapped person himself / herself.
Also, an audible click stop can prevent accidental rotation due to latch release.

[Brief description of drawings]

FIG. 1 is an exploded explanatory view of a bathroom lift with a back support according to the present invention.

FIG. 2 is a rear view of the left half of the back support.

FIG. 3 is a side view of the runner of the rotary arm engaged with the groove of the back support.

FIG. 4 shows a diagram of a slot arrangement in a T-web plate on a backrest.

5 is a longitudinal cross-section through the channel according to line 5-5 in FIG. 4;

6 is a cross-sectional view through the channel according to line 6-6 in FIG.

FIG. 7 is a view showing a correction groove.

8 is a cross-sectional view taken along the angled line 8-8 of FIG.

FIG. 9 is a side view of the back support.

[Explanation of symbols]

 10 Underframe 14 Seat Plate 16 Guide Frame 18 Hydraulic Lifting Hose 20 Back Support 22 Bottom Plate 24 Backrest 26 First Horizontal Axis 28 Plate Rotating Arm 30 Second Horizontal Axis 32 Coaxial Pin (Runner) 34 Groove Provided Outside Road 36 T Web plate 38 Shoulder 40 Slot bottom 42 Sleeve 44 Sliding pin (bypass track part) 46 Spiral compression spring 48 First long track part 50 Short end (angled end) 52 Connecting track part 52 'Extension 54 Bypass Track Part 56 Non-Stop Stop 58 Shoulder 60 Slope

Claims (10)

[Claims] 1. An underframe, a seat plate, and an interposing lifting frame having a lifting mechanism, a bottom plate member that can be arranged and fixed on the seat plate, and a first lateral plate on the bottom plate member. In a back support which can rotate around an axis from a tilted position to a flat position in a downward direction and a backward direction, and in which a backrest supported by the bottom plate member is pivotally attached, a vertical plane perpendicular to the backrest is provided with Providing a guideway with a web surface disposed therein for engaging therein a runner disposed at an upper end of the rotating arm;
Pivotally mounting about a second transverse axis located at a specific distance from the transverse axis of the; said guideway extending upwardly at least approximately along the entire length of said backrest and Incorporating a long track portion having a first confluence at its lower end where it joins the connecting track portion and it joins the bypass track portion at the second meeting point, It sequentially joins the bottoms of the long track portions at a third confluence such that the bottoms of the long track portions, the connecting track portions and the bypass track portions form a track loop;
A back support characterized in that a non-return stop device is arranged at at least one of the confluence points. 2. The back support device according to claim 1, further comprising a non-return stop device provided at each of the plurality of confluence points. 3. The runner is a spring biased pin; the guideway is designed as a slot device; the non-return stop is formed by a shoulder ending at the bottom of the slot. The back support according to claim 2. 4. The lower part of the slot of the main part of the slot device is in a common plane; each shoulder is placed in front of an ascending ramp; the shoulder is at least one of the adjacent groove parts.
The back support according to claim 3, wherein the back support is flush with the side surface. 5. The runner on the connecting track portion and the end point of the connecting track portion form a straight line forming an included angle of up to 45 ° with respect to the longitudinal centerline of the rotating arm. The described back support. 6. The long track portion ends at its bottom at a short end angled with respect to the backrest; this end angularly joins the connecting portion to the further confluence. The back support according to claim 1, further comprising a check stop device. 7. On the bypass track portion,
The tangent line at the confluence with the connecting track portion is
The back support device according to claim 1, wherein when the runner is arranged at this confluence, an angle of 90 ° or more is formed with an extension of the rotary arm in the longitudinal direction. 8. Designing the rotating arm as a plate with horizontal planes and runners on each of its opposite sides; both runners being coaxial and each on the backrest. 2. The back support according to claim 1, which engages with a guide path of the T-web plate. 9. A pin arranged on a sleeve inserted in said rotating arm is slidable back and forth, said sleeve protruding from said rotating arm and engaging said slot device, the latter in its cross section. A back support according to claim 3, characterized in that it comprises a shoulder forming a lower portion of said slot and having a central recessed slot in which said pin engages. 10. One of the components surrounding the rotating arm and the backrest, when the backrest is in its flat position, is urged by a spring to release the backrest and to release the backrest. The back support according to claim 1, wherein the back support is returned in the direction of the inclined position.