JPH0743585U - Wheelchair stair lift assistance device - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] The stairs of a wheelchair can be lifted and lowered with one caregiver, power, or the physical strength of a wheelchair passenger, or the slight help of an assistant. [Structure] Handles are attached to both front parts of the wheelchair, and two wheelchair support rods that rotate around fulcrums on both the front and lower parts of the frame are used to attach the oblong rack and small wheels, and the frame bearing The left and right gears connected by a shaft 16 that rotates in parallel with the arcuate rack engages with each other so that they rotate at the same time.
When 6 is rotated and the occupant's arm force is used, the gear directly connected to the rear wheel is brought into mesh with the gear so that the mesh can be released if necessary. [Effect] The small wheel is caught at the end of the stairs, and by raising and lowering it, the rear part of the wheelchair can be moved up and down, and in combination with the caregiver's handle operation, the stairs can be moved up and down.

Description

[Detailed description of the device] [Problems to be solved by the device] Even if there is one caregiver in the wheelchair, it is only a matter of stairs. This is a relatively handy technique. The purpose was to use it as a wheelchair with the device attached.

[Means for Solving the Problems] A handle is attached to the front part of the frame of the wheelchair, support shafts are provided on the front lower part and both sides of the frame, and a small wheel is attached to the tip of a wheelchair support rod that rotates around it. The small wheels should come out slightly behind the rear edge of the rear wheel (12) of the wheelchair, and the wheelchair support rod should be rotated to a certain extent by human power or power, and the small wheels should be hooked to the edge of the stairs for a further step. I made it possible to climb and descend. It is a collaborative work with a caregiver who supports the handle.

[Operation] By combining the caregiver's operation of the steering wheel and raising or lowering the small wheels depending on human power or power, the small wheels are hooked on the edges of the stairs to move up and down the stairs step by step.

[Example] As shown in [Fig. 1], a handle is attached to the front part of the frame of the wheelchair, a support shaft is attached to the lower front part of the frame, and a wheelchair support rod with small wheels and an oblong rack is fitted thereto, A gear that meshes with a rack is connected by a shaft (16), supported by a bearing mounted on a frame, and pulled by a rope wound around a drum mounted at the center of the shaft or the shaft (16) depending on power. Rotate and rotate the left and right gears to raise and lower the intermeshed rack that engages with it, raise and lower the small wheel at the tip of the wheelchair support rod, and hook it on the edge of the stairs to support the rear part of the wheelchair. Caregivers support and climb stairs one step at a time.

When using the arm force of a wheelchair passenger, the gear that meshes with the arcuate rack is attached not to the frame bearing but to the tip of the gear support rod that rotates around the center of the spindle, and is coaxial inside the rear wheel (12). The gears of the wheelchair are fixed, and the gears are always in mesh with each other due to the action of the pulling spring (10). Therefore, the wheelchair passenger rotates the rear wheel to rotate the wheelchair support rod within a certain range, With the wheel as a support, the wheelchair can be raised one step up and slowly lowered one step in combination with the caregiver's lifting of the handle.By pulling the lever for subsequent operation and releasing the meshing of the gears, the small car The wheel can be quickly climbed up and hooked on the edge of the next stairs, and when descending, the pulling spring (11) can be used to pull down the gear support rod to engage the gear with the gear. If released, the weight of the wheelchair support rod , It can be made to wear land under rapid one step the small wheel, efficiency is improved. Further, in this case, it is desirable that a device for preventing the reverse rotation of the rear wheels can be set arbitrarily.

[Effect of the device] A small number of people will be able to climb the stairs of a wheelchair with a small amount of labor, but especially for people who do not have difficulty in their physical strength, half of their own power will be helped by the caregiver. I think that the satisfaction of being able to climb the stairs is extremely high.

[Brief description of drawings]

FIG. 1 is a side view with the rear wheel removed,

FIG. 2 is a top view of the frame with only one side and the device.

FIG. 3 is a side view of the wheelchair supporting rod when the rear wheel is removed when the wheelchair support rod is lowered.

FIG. 4 is a side view when the gears are disengaged from each other,

[Figs. 5 and 6] Reference drawings for climbing stairs,

[Explanation of symbols] is frame is handle is support shaft is gear support rod is gear is wheelchair support rod is small wheel is arc gear rack is gear ▲ 10 ▼ is pull spring ▲ 11 ▼ is pull spring ▲ 12 ▼ is rear wheel ▲ 13 ▼ is a wire cable
Reference numeral 14 is a step, 15 is a lever, 16 is a shaft, and 17 is a rear wheel mounting shaft.

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[Procedure amendment]

[Submission date] July 4, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 Rear wheel in front of a wheelchair equipped with this device (1)
Side view omitting 2 ▼,

FIG. 2 is a top view of only one side of the device, which is also attached to the frame of the wheelchair,

FIG. 3 is a side view when the wheelchair support rod of the present device mounted on a wheelchair is lowered, and the rear wheel (12) in front is omitted.

[Fig. 4] Similarly, a side view when pulling out the wire cable (13) to release the engagement between the gears,

FIG. 5 is a view of a wheelchair equipped with this device when climbing stairs,
Side view omitting the front rear wheel (12)

FIG. 6 is a side view in which the rear wheel (12) on the front side is omitted when climbing the stairs.

[Explanation of symbols] is the frame of the wheelchair The handle is the support shaft The gear is the gear support rod The gear is the wheelchair support rod The small wheels are arcuate racks ▲ 10 ▼ ▲ 11 ▼ is the extension spring ▲ 12 ▼ is the rear wheel ▲ 13 ▼ Wire cable ▲ 14 ▼ is step ▲ 15 ▼ is lever ▲ 16 ▼ is shaft ▲ 17 ▼ is rear wheel mounting shaft

Claims (3)

[Scope of utility model registration request] 1. A wheelchair frame is provided with handles on both front sides thereof, support shafts are provided on both sides of a lower front portion of the frame, and the shafts rotate about the support shafts. One end of the wheel is slightly out of the rear edge of the rear wheel. A stair climbing assisting device for a wheelchair, in which a wheelchair support rod with small wheels is attached, and the wheelchair support rod can be rotated within a certain range by human power or gravity, and a wheelchair incorporating the device. 2. A wheelchair frame is provided with handles on both front sides, and support shafts are provided on both front lower portions of the frame, and gears are attached to the ends of two left and right gear support rods which rotate about the shafts. The gears are connected by a shaft (16) so that they rotate in the same way, and the gear support rod is pulled upward by a pulling spring (10), and the rear wheel (1)
Gears that are fixed to 2 and have the same support shaft are always engaged with each other, and small wheels and arc racks are attached to the wheelchair support rod that rotates about the same support shaft. The rack is always engaged with the gear, and a pulling spring ▲ 11 is placed between the wheelchair support rod and the frame.
The wheelchair according to item 1, wherein the ▼ is detachably attached, and the operation of the lever ▲ 15 ▼ attached to the handle is transmitted to the wire ▲ 13, and the gear support rod is pulled down so that the mesh between the gears can be released. Stair climbing assistance device,
A wheelchair that incorporates it. 3. The apparatus according to claim 2, except for the gear directly connected to the rear wheel (12) and the gear support rod, the gear shaft (16).
The stair climbing assist device for wheelchairs according to claim 1, wherein the bearing is mounted on a frame, a drum is mounted at the center of the shaft (16), and a rope wound around the drum is pulled to rotate the gears.