JP4895403B2 - Nursing wheelchair - Google Patents

Description

  The present invention relates to a nursing wheelchair suitable for a disabled person and an elderly person, and more particularly to a so-called six-wheeled nursing wheelchair having a central portion of a wheelchair body and a pair of wheels with casters on the front and rear thereof. .

As what is called a six-wheel type wheelchair provided with a center part of a wheelchair main body and a pair of wheels with casters in the front and rear thereof, for example, those described in Patent Documents 1 to 4 are known. These conventional 6-wheel type wheelchairs have to be rented in order to get over the sill indoors and the steps on the sidewalk. Is effective and has excellent step-over performance due to the action of the rear wheels (auxiliary wheels). This type of wheelchair also has a function as a so-called water wheelchair such as a bathroom or toilet.
JP 2002-263140 A JP 2004-113486 A Japanese Patent Laid-Open No. 2004-166772 JP 2004-202264 A

  However, in the conventional 6-wheel type wheelchair including the wheelchairs described in Patent Documents 1 to 4, wheels other than the wheel in the central part of the main body, that is, the front wheels and the rear wheels (auxiliary wheels) have wheels with casters. Most of them are used, and it has the advantage that a small turn is effective in a flat place where there is no step and the running is stable. When climbing over a step, lifting the front wheels with casters will inevitably tilt the rear, so the rear wheels with casters (auxiliary wheels) are loaded and at the same time the caster support shaft of the rear wheels tilts. There was a problem that the rotation function of the wheelchair was lost and it was difficult to change the direction of the wheelchair.

  The present invention has been made to solve such a conventional problem, and the caster support shaft of the rear wheel (auxiliary wheel) is always kept vertical even when climbing a step on an indoor sill or on a sidewalk. Thus, an object of the present invention is to provide a six-wheeled wheelchair that can smoothly change the direction of the wheelchair with a slight force as in a flat place.

  The nursing wheelchair according to the present invention is a six-wheeled wheelchair in which the front wheels and the rear wheels (auxiliary wheels) excluding the wheel at the center of the main body are wheels with casters. The wheel (auxiliary wheel) is connected to the rear part of the leg body via a link mechanism so that the wheel (auxiliary wheel) is always maintained in a vertical state, and the gist is a rear frame part having a backrest part. And a side frame portion having a seat portion, a main body portion comprising a pair of step pipes detachably connected to the side frame portion, and a leg body having a pair of wheels attached to both end portions, In a six-wheel type wheelchair for nursing care that is integrated with each other and is provided with a pair of auxiliary wheels with casters at the rear of the leg, opposite to the rear end of the leg An auxiliary wheel support member that vertically supports the auxiliary wheel with casters is attached to a substantially horizontal portion of a substantially L-shaped member having a downward vertical portion on a surface thereof, and is connected to a rear end portion of the leg body via a link mechanism and a spring. And the link mechanism is connected between an upper end portion of the vertical portion of the auxiliary wheel support member and the leg body portion, and a lower end portion of the vertical portion of the auxiliary wheel support member and the leg. It is composed of two sets of links horizontally disposed between the upper part of the wheel support member with a caster at the rear end part of the body, and the spring is provided between the upper end part of the vertical part of the auxiliary wheel support member and the rear end part of the leg body. The auxiliary wheel attached to the auxiliary wheel support member is hung between the lower end portion of the wheel support member, the leg body is inclined against the spring by the link mechanism, and the front wheel side floats from the ground contact surface. Caster It is characterized in that no a mechanism which is always held vertically by the action of the serial link mechanism and the spring.

  Since the wheelchair for nursing care of the six-wheeled vehicle according to the present invention is configured as described above, the leg of the wheelchair is not only horizontal but also when the leg is tilted by lifting the front wheel regardless of the tilt angle. Since the rear wheels (auxiliary wheels) with casters are always kept in a vertical state and the rotation function of the casters is not lost, they are not only excellent in straightness on ramps and stepping over steps, but also indoors Even when the legs are inclined when climbing over a step on a sill or a sidewalk, the wheelchair can be turned smoothly with a slight force as in a flat place.

FIG. 1 is a side view showing an embodiment of a nursing wheelchair according to the present invention, FIG. 2 is a front view of the nursing care wheelchair, FIG. 3 is a perspective view showing a main part of the nursing wheelchair, and FIG. 1 is a side view showing a connection state of a leg and a rear wheel with wheels (auxiliary wheel) in a state where a front wheel of a wheelchair is lifted; 1 is a rear frame part, 1-1 is a backrest, 2 is a side frame part, 3 Is a seat plate, 3-1 is a seat plate, 4 is a step pipe, 5 is a leg body, 5-1 is a straight leg pipe, 5-2 is a U-shaped connection pipe, 6 is a connection support member, and 7 is a main wheel. 7-1 is a main wheel support member, 8 is a front wheel with casters, 8-1 is a front wheel support member, 9 is a rear wheel (auxiliary wheel) with casters, 9-1 is a rear wheel (auxiliary wheel) support member, Rear wheel connection mechanism, 10-1 is a concave link in cross section, 10-2 is a plate-like link, 10-3 is Pulling, 11 is a flip-up armrests.

  That is, the nursing wheelchair according to the present invention shown in FIGS. 1 to 3 includes a rear frame portion 1 having a backrest 1-1, and a side frame portion that supports a seating surface portion including a seating surface plate 3 and a seating surface sheet 3-1. Reference numeral 2 denotes a single pipe, and a pair of step pipes 4 are detachably connected to the ends of the left and right side frame portions 2. The seating surface plate 3 and the seating surface sheet 3-1 constituting the seating surface portion are seated on the upper surface of the seating surface plate 3 whose both ends are detachably fixed to the left and right side frame portions 2 with screws 3-2. 1 is attached to the structure. Further, the step pipe 4 is screwed to the bracket 4-1 attached to the lower end of the step pipe 4 so that the step pipe 4 can be rotated in the front-rear direction. It is provided so as to be inclined and supported on the pipe 4 side, and the upper end portion of the step pipe 4 is detachably fitted to the pipe of the side frame portion 2.

  The leg body 5 is formed integrally with a pair of straight leg pipes 5-1 by a U-shaped connecting pipe 5-2 so as to be parallel to each other at a predetermined interval. A front wheel 8 with casters is attached to a front wheel support member 8-1 that is externally fitted and fixed to 5-1, and a substantially L-shaped main wheel support member that is externally fitted and fixed to a straight leg pipe 5-1 at the rear end. The main wheel 7 is attached to 7-1, and the seating surface portion composed of the seating surface plate 3 and the seating surface sheet 3-1 is connected to the leg body 5 via the connection support member 6 disposed at the center of the side surface of the leg body 5. Connected together. The connecting structure of the leg 5, the connecting support member 6 and the seat surface portion is such that a straight leg pipe 5-1 of the leg 5 and a U-shaped connecting pipe 5-2 are provided in a recess 6-1 provided at the lower part of the connecting support member 6. And the straight leg pipe 5-1 and the U-shaped connecting pipe 5-2 of the fitting portion and the connecting support member 6 are fastened with bolts 6-2, and formed on the upper part of the connecting support member 6. The horizontal plate portion 6-3 is structured to be fastened to the back surface of the seat plate 3 with screws 6-4.

  On the other hand, a pair of caster-equipped rear wheels (auxiliary wheels) 9 provided at the rear part of the leg 5 has an outward appearance having a downward vertical portion 9-1a on a surface facing the rear end of the leg 5, respectively. The caster portion is vertically attached to a support cylinder portion 9-1c that is vertically protruded from a substantially horizontal portion 9-1b of a rear wheel (auxiliary wheel) support member 9-1. Is connected to the main wheel support member 7-1 fixed to the upper and lower sides of the link mechanism including the reverse concave link 10-1 and the plate link 10-2, and the spring 10-3. ing. That is, the link mechanism has a screw 10 between the upper portion of the vertical portion 9-1a of the rear wheel (auxiliary wheel) support member 9-1 and the upper portion of the main wheel support member 7-1 fixed to the rear portion of the leg 5. -1a, 10-1b, a cross-section reverse concave link 10-1, a lower end portion of the vertical portion 9-1a of the rear wheel (auxiliary wheel) support member 9-1, and the main wheel support member 7- 1 and an upper end of the vertical portion 9-1a of the rear wheel (auxiliary wheel) support member 9-1. And the lower end of the main wheel support member 7-1 at the rear end of the leg body, and the leg body 5 is inclined against the spring 10-3 by the link mechanism and is attached to the front wheel with casters. At the same time as 8 floats from the ground contact surface, it is attached to the rear wheel (auxiliary wheel) support member 9-1. When the rear wheel (auxiliary wheel) 9 with casters moves slightly rearward together with the rear wheel (auxiliary wheel) support member 9-1, the caster of the rear wheels (auxiliary wheels) 9 with casters moves the link mechanism and the spring. This is a mechanism that is always kept vertical by the action of 10-3. Here, the leg 5 side end of the cross-section reverse concave link 10-1 constituting the link mechanism is pivotally attached to the main wheel support member 7-1 that is externally fixed to the rear end of the leg 5. However, the end of the cross-section reverse concave link 10-1 on the leg 5 side may be pivotally attached directly to the leg 5 itself. In this case, the main wheel support member 7-1 can be attached to the lower surface of the rear end portion of the leg 5 directly or using a bracket or the like. In addition, the main wheel 7, the front wheel 8 with casters, and the rear wheel (auxiliary wheels) 9 with casters are exemplified here by adopting two pairs of wheels (12 wheels in total). Needless to say, a total of 6 wheels may be used.

  As shown in FIG. 1, one pair of left and right raised armrests 11 is pivotally attached to the rear frame portion 1 so that one end of one pipe 11-1 bent into an L shape is pivotable in the vertical direction. An L-shaped stopper 11-1b, which is detachably fitted to the joint projection 11-1a attached to the side frame portion 2 and pivotally attached to the end portion of the side frame portion 2, is connected to the joint projection 11. It is configured to be locked (preventing detachment) by being positioned directly below -1a, and to be unlocked and flipped up by moving the L-shaped stopper 11-1b in a lateral direction.

  In the nursing wheelchair having the above-described configuration, in order to lift the front wheel 8 with casters when climbing over an indoor sill or a step on a sidewalk, the handle portion of the rear frame portion 1 is grasped and pushed downward against the chair body. When the pressure is applied, the leg 5 is inclined against the spring 10-3 by the link mechanism as shown in FIG. 4 so that the front wheel 8 with casters rises from the ground contact surface and at the same time supports the rear wheel (auxiliary wheel). When the rear wheel (auxiliary wheel) 9 with a caster attached to the member 9-1 moves slightly rearward together with the rear wheel (auxiliary wheel) support member 9-1, the rear wheel (auxiliary wheel) 9 with caster is moved. Since the caster is always held vertically by the action of the link mechanism and the spring 10-3, the seat is inclined backward and the rear wheel (auxiliary wheel) 9 with a load is loaded. Not the rotation function of the caster is lost, it is possible to perform smoothly change direction of the wheelchair at a flat place as well as slight force.

  As described above, the wheelchair for nursing care of the six-wheeled vehicle according to the present invention is not only when the leg of the wheelchair is horizontal, but also when the leg is tilted by lifting the front wheel, regardless of the tilt angle, Auxiliary wheels) are always kept in a vertical state and the rotation function of the caster is not lost, so not only the straightness on the ramp and the step over step performance are excellent, but also the steps on the indoor sill and sidewalk Even when the legs are inclined when getting over, the wheelchair can be changed direction smoothly with a slight force as in a flat place. Therefore, the nursing wheelchair according to the present invention is extremely practical as a nursing wheelchair because of its superior direction changing performance especially when lifting the front wheels.

It is a side view which shows one Example of the wheelchair for care which concerns on this invention. It is a front view of a wheelchair for nursing care same as the above. It is a perspective view which shows the principal part of a wheelchair for nursing care same as the above. It is a side view which shows the connection state of the leg body and the rear wheel with a caster (auxiliary wheel) in the state where the front wheel of the care wheelchair was lifted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear frame part 1-1 Backrest 2 Side frame part 3 Seat surface board 3-1 Seat surface sheet 3-2 Screw 4 Step pipe 4-1 Bracket 4-3 Step 5 Leg body 5-1 Straight leg pipe 5-2 U Shaped connection pipe 6 Connection support member 6-1 Recess 6-2 Bolt 6-3 Horizontal plate 6-4 Screw 7 Main wheel 7-1 Main wheel support member 8 Front wheel with casters 8-1 Front wheel support member 9 Rear wheel with casters (Auxiliary wheel)
9-1 Rear wheel (auxiliary wheel) support member 10 Rear wheel connection mechanism 10-1 Cross-section concave link 10-2 Plate-like link 10-3 Spring 11 Bounce-up type armrest 11-1 Pipe

Claims (1)

  A rear frame part having a backrest part, a side frame part having a seat part, a main body part consisting of a pair of step pipes detachably connected to the side frame part, and a pair of wheels attached to both ends. In a six-wheel type wheelchair for nursing care, in which a leg is integrated through a connecting support member and a pair of auxiliary wheels with casters are provided at the rear of the leg, relative to the rear end of the leg An auxiliary wheel support member that vertically supports the auxiliary wheel with casters on a substantially horizontal portion of a substantially L-shaped member having a downward vertical portion on the facing surface is provided at a rear end portion of the leg via a link mechanism and a spring. The link mechanism is movably connected to each other in the vertical direction, and the link mechanism is provided between an upper end portion of a vertical portion of the auxiliary wheel support member and a rear end portion of the leg body, and a suspension of the auxiliary wheel support member. It is composed of two sets of links provided between the lower end of the part and the upper part of the wheel support member at the rear end of the leg, and the spring is connected to the upper end of the vertical part of the auxiliary wheel support member and the rear of the leg. The leg is hung between the lower end of the wheel support member at the end, the leg is inclined against the spring by the link mechanism, and the front wheel side is lifted from the ground contact surface, and is attached to the auxiliary wheel support member A nursing wheelchair characterized in that the caster of the auxiliary wheel is always held vertically by the action of the link mechanism and the spring.