JPS6214854Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a lifting platform, particularly a lifting platform suitable for getting on and off a wheelchair, which allows physically disabled people who have difficulty standing up or walking, elderly people, etc. to get on and off the wheelchair without much assistance from an attendant. be.

As the aging population progresses, there is an increasing number of physically disabled people who have difficulty standing up and walking, as well as elderly people who use wheelchairs. Wheelchair users often spend their daily lives in wheelchairs, and when they go out, they have to get on and off the wheelchair on steps. This means that wheelchair users inevitably have to get on and off the wheelchair more frequently, and each time they need help from a caregiver. In short, it imposes a large physical burden on the attendant and a large mental burden on the user.

In view of the current situation, this invention was made with the particular purpose of providing a lift platform that can be used as an auxiliary device that allows wheelchair users to safely and easily get on and off the wheelchair without requiring much assistance from an attendant. a base frame having wheels; a pair of left and right columns fixed to the rear of the base frame so as to be substantially perpendicular to the floor;
A rear leg frame that is slidably engaged with these supports, a frame that forms the skeleton of a sitting surface that is cantilever-fixed to the rear leg frame, and a frame that is attached to the base together with the rear leg frame. In a lifting platform equipped with an elevating mechanism that moves up and down relative to a base frame, the wheels are attached only to the rear of the base frame, the base frame is brought into contact with a floor surface, and the elevating mechanism The platform is characterized in that it is raised and lowered by the power of a rotary drive member driven by a switch operation by a user, or by manual operation by a user.

Hereinafter, an embodiment of the device according to the invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of the external appearance of this embodiment device.
FIG. 2 is a side view of its external appearance.

This device is constructed by connecting members mainly made of lightweight pipe materials to each other by welding or the like, and consists of a rectangular base frame 1, and a rectangular base frame body 1, with the left and right sides of the rear part approximately perpendicular to the floor surface. A rear leg frame 3 that is slidably engaged with a support column 2 fixed to
The ends are welded and fixed to the front surface of the lower end of the frame body 4, which forms an inverted U-shape when viewed from above and forms the skeleton of the sitting surface, and this frame body 4, together with the rear leg frame body 3, is attached to the base. The main parts are constituted by an elevating mechanism 5 that moves up and down with respect to the underframe 1, and an armrest frame 6 that is engaged with the outside of the rear leg frame 3 so as to be rotatable in the outer circumference.

The base frame 1 is provided at its rear with a reinforcing member 7 that connects the left and right frames, and the rear parts are each narrowed inward from this connection point, and the wheels 8 are connected to the frame 1 in this space. It is housed in a cantilevered manner supported by a bracket fixed to the reinforcing member 7. The left and right columns 2 made of pipe material are welded at their lower ends to a base plate that spans the reinforcing member 7 and the rear member of the base frame 1 so as to maintain a vertical posture. The rear leg frame 3, which is slidably engaged with the support column 2, has its upper part bent rearward to form a horizontal handle part 9, and is further connected by an upper connecting member 10 slightly below the handle part 9. They are connected to each other by a lower connecting member 11 near their lower ends.

A pair of support rods are fixed to the upper connecting member 10 at symmetrical positions in the center thereof, and a head rest 12 is attached to the support rods. The lower connecting member 11 is made of a square pipe material, and has a nut portion 14 fixed to the rear side of the central portion thereof to be screwed into the threaded rod 13.

A large number of support plates are attached to the left and right frames of the skeletal frame 4 of the sitting surface at regular intervals, and these are covered with a cushion sheet to form the sitting surface.

This seat frame 4, together with the rear leg frame 3,
The elevating mechanism 5 that moves up and down with respect to the base frame 1 is shown in FIG.
As shown in the figure, bearings 17 and 18 are fixed to the center portions of the base plate 15 and the connecting bar 16, which are spanned between the reinforcing member 7 and the rear member of the base frame 1, respectively.
a threaded rod 13 whose lower end and upper end are rotatably supported, the nut portion 14 screwed into the threaded portion, and a bevel gear 19 fixed thereto near the lower end of the threaded rod 13. , and a bevel pinion 21 that is fixed to the output shaft of a gear motor 20 installed on the base plate 15, meshes with the bevel gear 19, and drives the bevel gear 19.

The connecting bar 16 is a member that holds the upper bearing 18 of the threaded rod 13, as shown in FIG.
Both left and right ends thereof are fixed to the upper end of the support column 2 via projecting arms 22, respectively. On the rear side of the rear leg frame 3, slits 23 are provided in the axial direction to avoid interference with the protruding arms 22 when the frame 3 moves vertically along the support 2. It is provided. The armrest frame 6 is attached to a pair of upper and lower overhanging arms that extend rearward from the outside of the rear leg frame 3 and are fixed so as to be rotatable outwardly. A resilient engagement portion provided near the rotation pin 24 prevents rotation unless a certain amount of external torque is applied.

In this device, as shown in FIG. 2, the rear part of the base frame 1 is slightly lifted off the floor by wheels 8, and the front part contacts the floor with the lower surface of the member. It is placed on the floor.

The operation of this device will be explained using an example in which a wheelchair user sitting in a room transfers to a wheelchair placed at a doorway in order to go out.

The wheelchair user approaches this device placed on the floor near the doorway, and as shown in the figure, sits on the seat surface of the frame 4 lowered to the lowest position with his legs hanging out in front of him.

In this case, the seat surface is located at a second location away from the floor surface.
Although not shown in the figure, when the pendant switch that operates the gear motor 20 is operated in the "down" direction when it is in the high position indicated by the two-dot chain line in the figure, the threaded portion of the threaded rod 13 is, for example, a right-handed thread. For example, the threaded rod 13 is rotated counterclockwise when viewed from above by the meshing of the bevel pinion 21 and the bevel gear 19, and the nut portion 1 screwed into this threaded portion is rotated.
4 is lowered together with the lower connecting member 11, the rear leg frames 3 connected to both ends of the lower connecting member 11 are lowered along the support column 2, and along with this, the skeletal frame 4 of the sitting surface and the armrest are lowered. When the frame bodies 6 both descend to the lowest positions indicated by solid lines, a micro switch to be described later is activated to stop the gear motor 20. Then, the armrest frame 6 on the side that is easier to ride on may be rotated outwardly to rest on the seat surface, and then the armrest frame 6 may be returned to its original position.

Then raise the pendant switch again.
The seat surface of the device is raised to the same height as the seat surface of a wheelchair brought close to the device by a caregiver. In this way, the wheelchair user can easily transfer to the wheelchair with only a little assistance from the attendant. In this case, if the device moves on the floor surface, it will be difficult for the adhesive to transfer, so a rubber material with high frictional resistance, for example, is pasted on the surface of the front member of the base frame 1 that comes into contact with the floor surface. It is recommended that the brakes be applied to the wheels 8.

When getting off the wheelchair via this device and returning to the room, the above steps can be performed in the reverse order.

In addition, in order to lie down on a bed indoors, this device can be used in the same way as above when climbing onto a bed from the floor or descending from a bed to the floor. An elderly person is able to function without much assistance from a caregiver.

To move this device to a key location indoors or outdoors, a caregiver should place both hands on the handle 9 and hold the base frame 1.
Just lift the front member slightly and push it.

Next, the safety device in this device will be explained.

In this device, when the seat surface occupies the lowermost position mentioned above, the frame body 4 enters inside the base frame body 1, so that the device is inferior in terms of judgment and behavior compared to a healthy person. To prevent a user, such as a physically handicapped person or an elderly person, from having his/her body or part of his/her clothes caught between the frame 4 and the base frame 1 when the frame 4 is lowered. Safety devices are provided.

FIG. 4 is a partial external side view showing one example.

This safety device has a thin rubber band plate 30 placed on the outside of the front member and left and right side members of the frame 4, respectively, so that the lower end of the plate slightly protrudes from the bottom surface of the frame 4. The band plate 30 is attached in an inverted U-shape via a holding plate 31, and the piano wire 32 is held in parallel to the band plate 30 slightly apart from its lower end surface, and the end of the piano wire 32 is attached to the frame 4. micro switches 33 fixed near the base of each
It is designed to be connected to the contact lever of.

Therefore, if, for example, a part of the user's body or clothing falls into the lowering area of the frame 4 during the lowering of the frame 4, the piano wire 32 will first come into contact with it. Since the piano wire 32 is held by the easily deformable rubber band plate 30, no matter where contact occurs, the piano wire 32 will be able to pull the contact lever of the microswitch 33 at either end. , switch 33 is activated. The gear motor 20 rotating in the downward direction is then stopped, thereby preventing accidents. Further, when the piano wire 32 contacts the floor surface and the gear motor 20 stops, the seat surface is always kept at the lowest position.

On the other hand, to regulate the top position of the sheet surface,
A micro switch (not shown) is mounted at a predetermined distance from the connecting bar 16, which is always held at a constant height from the floor, and its contacts are fixed to the upper connecting member 10. It may be activated by one piece.

Note that the piano wire 32 may be replaced with a light beam, and the light receiving section and the light emitting section may be elastically held on the lower surface of each member of the frame 4.

Furthermore, by using the above-mentioned obstacle detection method, instead of the safety device, a telescopic structure is provided between the frame 4 and the base frame 1 that surrounds the front, left, and right sides, as shown in FIG. A bellows 35 may be attached. However, in this case, the seat surface is separated from the floor by the height of the folded bellows 35.

On the other hand, when regulating the highest height of the seat surface, it must also be adjusted to the limit to which the bellows 3 can be extended. In addition, if the safety device is a bellows, a micro switch (not shown) that is activated by contact with the floor surface or the base frame 1 is installed at the lowest position in order to automatically stop the seat surface while lowering it. What is necessary is to attach it to the frame 4.

As explained above, whatever the safety device may be, it does not change the gist of this invention, and the safety device is not limited to those listed above.

In addition to the above-mentioned threaded rod 13 and the nut portion 14 screwed into the threaded rod 13, the lifting mechanism of the skeleton frame 4 of the sitting surface includes a connecting bar 16, which is a wire whose end is fixed to the lower connecting member 11. It may be constructed by providing the base frame with a small winding drum that winds up or lets out a pulley fixed to the base frame, and the present invention is not limited to these.

As is clear from the above explanation, in the elevating platform of this invention, the seat surface provided thereon can move its height position within a certain height range from the lowest position close to the floor surface. It is designed to be able to be changed freely, and is also provided with wheels and a handle for transportation so that it can be moved to a desired location. Since the base frame is in contact with the floor, the level difference between the floor and the frame that forms the framework of the sitting surface is extremely small, and the contact resistance between the two is reduced. Since rolling is prevented, the frame that forms the framework of the sitting surface does not move carelessly, and therefore, you can sit comfortably without the help of an attendant at all.
People with physical disabilities will be able to get on and off the sitting surface on their own with peace of mind. In addition, since the lifting mechanism is raised and lowered by the power of a rotary drive member driven by the user's switch operation or by the user's manual operation, the user, such as a physically handicapped person, can operate the operating switch himself. Since the sitting surface can be raised and lowered, it can be easily raised and lowered without bothering the attendant. This makes it easier for the person to act without much assistance from a caregiver, reducing the physical burden on the caregiver as well as the mental burden on the physically disabled and elderly. In addition, when a safety device is provided on the frame of the sitting surface that can be raised and lowered, it is necessary to prevent an accident in which a part of the user's body or clothing is caught between the frames while the sitting surface is lowered. It can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view of the external appearance of an embodiment of the device according to the present invention, FIG. 2 is a side view of the external appearance of the device, FIG. 3 is a partial plan view of the cross section of FIG. 1 as seen in the direction of the arrow, and FIG.
FIG. 1 is a partial external side view showing an example of a safety device for a seat frame, and FIG. 5 is a partial external side view showing another example of the same safety device. 1...base frame, 2...support, 3...rear leg frame, 4...seat frame, 5...lifting mechanism,
6: Armrest frame body, 8: Wheels, 11: Lower connecting member, 13: Threaded rod, 14: Nut portion, 1
6: connecting bar; 17, 18: bearing; 19:
Bevel gear, 21...Bevel pinion, 30...
Strip-shaped rubber sheet, 32...piano wire, 33...micro switch, 35...bellows.

Claims (1)

[Claims for Utility Model Registration] 1. A base frame having wheels, a pair of left and right columns fixed to the rear of the base frame so as to be substantially perpendicular to the floor surface, and a pair of columns capable of sliding freely on these columns. a rear leg frame that is engaged with the rear leg frame; a frame that forms the skeleton of a sitting surface that is fixed in a cantilever manner to the rear leg frame; and this frame, together with the rear leg frame, is attached to the base frame. In a lifting platform equipped with a lifting mechanism for lifting and lowering,
The wheels are attached only to the rear part of the base frame, and the base frame is brought into contact with the floor surface, and the elevating mechanism is powered by a rotary drive member driven by a switch operation by a user. Alternatively, an elevating platform characterized in that it can be raised and lowered by manual operation by the user. 2. In the lifting mechanism, threaded rods are rotatably supported by bearings fixed to the base frame and bearings fixed to a connecting bar connecting the left and right columns near their upper ends, and the threaded rods are A nut portion that is screwed into the threaded portion is fixed to a lower connecting member that connects the left and right rear leg frames at their lower portions,
The lifting platform according to claim 1, which is a registered utility model, further comprising a rotational driving member provided at a lower portion of the threaded rod. 3. The elevating mechanism moves the wire whose end is fixed to the lower connecting member that connects the left and right rear leg frames at its lower part to the pulley that is fixed to the connecting bar that connects the left and right support columns at its upper end. Utility model registration claim No. 1 in which a winding drum for winding or unwinding is provided on a base frame body.
Elevating platform mentioned in section. 4. A request for utility model registration in which the frame forming the framework of the sitting surface has bellows that expand and contract between its front and side members and the corresponding members of the base frame. The lifting platform according to any one of the ranges 1, 2, and 3. 5. The frame forming the framework of the sitting surface is slightly separated from the lower surfaces of the front and side members, and the end is connected to the operating lever of a micro switch fixed to the base of the frame. An elevating platform according to any one of claims 1, 2, and 3, which holds a piano wire in a deformable manner.