JP3051905U - Wheelchair transport bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a wheelchair transport bicycle that can be transported without modifying an existing wheelchair. [Constitution] A wheelchair transport bicycle includes a bicycle main body 10 and a wheelchair setting table 12 detachably arranged at a front portion of the main body 10.
It consists of The main body 10 has a pair of rear wheels 14, a saddle 16, a pedal 18, and a steering wheel 20 arranged on a frame 22. Unlike a normal bicycle, the main body 10 has a structure in which only the front wheels are removed. The front wheels 24 are arranged on both sides of the mounting table 12. The lower end of the handle shaft 20a and the connecting shaft 48 connected to the handle shaft 20a
Is connected to the link lever 58 on the lower side of
The link lever 58 is connected to a direction changing bell crank 64 of the front wheel 24 via a transmission mechanism such as a parallel link 60 and a lever 62, so that the front wheel 24 moves right and left in accordance with the steering direction of the steering handle 20. Can be converted.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a wheelchair and a bicycle suitable for carrying a physically handicapped person riding the wheelchair.

[0002]

[Prior art]

 As is well known, the wheelchair is moved manually by the occupant or by pushing from behind by a caregiver. In such a moving method, there was a problem that the range of action was restricted due to the fatigue of the caregiver and the vehicle could only be moved at a low speed.

[0003] In order to solve such a problem, for example, a means for moving a wheelchair by electric power is also provided in part, but since this kind of electric wheelchair is not mass-produced at present, the wheelchair itself is used. However, it became very expensive, and it was difficult to put it into practical use in terms of cost.

Therefore, for example, Japanese Utility Model Laid-Open No. 2-83185 discloses a bicycle adopting a bicycle for moving a wheelchair as a moving means that is faster than a manual moving speed and cheaper than an electric one. Proposed.

[0005] However, the moving means for a wheelchair disclosed in this publication has the following technical problems.

[0006]

[Problems to be solved by the invention]

 That is, the bicycle having the wheelbarrow disclosed in the above publication has a structure in which the front wheel of a normal bicycle is removed and a wheelchair is separably connected to this part, and the whole is of a three-wheel structure. This three-wheeled bicycle is driven by the rear wheels and is of the front-wheel steering type.

On the other hand, a general manually operated wheelchair, which is widely used in hospitals and rehabilitation centers, has a front wheel that is a caster, and a rear wheel that is freely rotatable. , A forward / backward change of direction or a change of direction, or a forward / backward change of direction, depending on the pushing force of a person pushing a pair of push bars projecting from the rear of the wheelchair, and the force applied. ing.

Therefore, in the wheelchair bicycle disclosed in the above publication, the wheelchair itself must be modified in order to change the direction of the rear wheel of the wheelchair by manipulating the steering wheel, and is not applicable to most existing wheelchairs. Did not.

[0009] The present invention solves the above problems, and an object of the present invention is to provide a wheelchair transport bicycle that can be transported without modification of an existing wheelchair.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a bicycle body having a rear wheel, a saddle, a pedal, and a steering handle provided on a frame, a bicycle body connected to a front side of the bicycle body, and a single bicycle. And a pair of front wheels that are arranged on the left and right sides of the installation table and are connected to the steering wheel and can be steered. According to this configuration, the bicycle can be moved and transported by installing an existing wheelchair on an installation table provided at the front part of the main body. The direction can be changed by connecting the front wheels provided on both sides of the installation stand to the steering handle. Further, in the present invention, a guide frame is provided on the front side of the installation table so as to be foldable and expandable, and in the unfolded state of the guide frame, the leading end thereof lands, and there is no inclined guide path that is continuous with the installation table. In addition, in the folded state, the wheelchair mounted on the wheelchair can also be used as a vehicle stop function, so that the wheelchair can be smoothly entered and exited, and can be prevented from falling off the wheelchair mounting table during transportation, thereby improving safety. Further, in the present invention, since the installation base is provided with the bicycle parking brake, it is possible to maintain the stability at the time of getting on and off the wheelchair. Further, the present invention provides an assisting electric motor that rotates in connection with a chain transmission mechanism that transmits the rotational driving force of the pedal to the rear wheel, and a battery that is fixed at an appropriate position on a frame and supplies power to the electric motor. With this system, transportation work can be performed with small force without relying only on human power. In this case, the driving mechanism of the electric bicycle is mass-produced, widely used, and can be assembled relatively inexpensively, although it is slightly more expensive than a human-powered bicycle. In addition, in the present invention, since the rear wheels are two wheels, the bicycle becomes a four-wheeled bicycle, and running stability is improved. Furthermore, in the present invention, since the bicycle body and the mounting base are detachably connected, the two can be separated and stored when not in use, and immediately connected as a wheelchair transport bicycle when connected when not in use. Can be used.

[0011]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 show an embodiment of a wheelchair transport bicycle according to the present invention. FIG. 1 is a side view and FIG. 2 is a plan view.

The bicycle shown in FIG. 1 includes a bicycle main body 10 and a wheelchair setting stand 12 which is detachably disposed at a front portion of the main body 10.

The main body 10 has a pair of rear wheels 14, a saddle 16, a pedal 18, and a steering wheel 20 arranged on a frame 22. Unlike a normal bicycle, only a front wheel is removed. The front wheel 24 is arranged on both sides of the installation table 12.

The frame 22 includes a rear shaft frame 22a that rotatably supports the axle of the rear wheel 14, a pipe-shaped main frame 22b that is connected to the center of the rear shaft frame 22a and extends in the front-rear direction of the vehicle body. A pipe-shaped saddle frame 22c which is located at an intermediate position of the main frame 22b and extends obliquely upward, one end of which is connected to the upper end of the saddle frame 20c, and the lower end of which is formed in a substantially triangular shape on the rear shaft frame 22a. It is roughly composed of an auxiliary frame 20d joined in a straight line and a pipe-shaped handle shaft frame 20e obliquely connected to the front of the main frame 22b.

A large-diameter sprocket wheel 26 connected to the pedal 18 is rotatably supported below the main frame 22b like a general bicycle, and the sprocket wheel 26 is mounted on the rear wheel 14. In addition to being connected to a sprocket wheel 28 via a chain 30 and transmitting the rotational power of the pedal 18 via these chain transmission mechanisms, the sprocket wheel 26 is connected to an assist motor drive unit 32 disposed below the main frame 22b. Is also linked.

The drive unit 32 is driven by power supply from a battery pack 34 fixed to the rear of the saddle frame 20c, and reduces the burden on the driver by performing chain drive in cooperation with a person. In general, when a heavy load is applied to the driver on a slope or the like, a torque sensor disposed at a crank rotating portion of the pedal 18 detects this, and drives the motor based on the output of the sensor. It is a mechanism to reduce the burden on the people.

The battery pack 34 as a power source is detachable, can be repeatedly charged by a home charger, and a daily power source can be secured.

The mounting table 12 is configured by arranging side plates 38 on both sides of a pipe frame 36 framed in a rectangular shape, and integrally laying a wheel mounting plate 40 inside each side plate 38. It is possible to set up a car.

A connecting frame 42 coaxial with the handle shaft frame 20e is erected at the rear of the mounting table 12, and a connecting pipe 44 is horizontally protruded from the rear end thereof. It is supported by a pair of auxiliary frames 46 that stand up in a triangular shape from the frame structure 36, and are detachable from the main body 10.

FIGS. 3 and 4 show the connection shaft structure. A connection shaft 48 connected to the handle shaft 20 a of the handle 20 protrudes slidably from the upper end of the connection frame 42. The outer periphery of the shaft 48 is connected to a lock pin 52 projecting from a slide groove 50 opened in an inverted L-shape on the side surface of the connection frame 42, and this lock pin 52 is connected to the handle shaft 20a at the raised position, By being locked in a lock groove 50a that continues in a horizontal direction from 50, it is held at the connection position.

A center shaft 54 projects from the rear end of the connection pipe 44. The center shaft 54 is inserted into a connection pipe 56 horizontally connected to the front end side of the main frame 22b, and a pair of pin holes 54a opened to both sides. , 56a are connected by inserting a pin (not shown).

Therefore, when it is unnecessary, the installation stand 12 and the main body 10 can be completely separated and stored, and if necessary, they can be connected to be used as a wheelchair transport bicycle.

When not in use, it can be replaced with a normal front wheel. In this case, it can be used as a normal motor-powered three-wheeled bicycle.

As shown in FIG. 2, the lower end of the connecting shaft 48 is connected to a link lever 58 on the lower side of the mounting table 12. The steering wheel 20 is connected to a bell crank 64 for changing the direction of the front wheel 24 via a transmission mechanism such as 62, so that the front wheel 24 can be turned left and right in accordance with the steering direction of the steering wheel 20.

Further, a guide frame 68 is connected to the front side of the installation base 12 via a shaft 66 so as to be foldable and deployable. A guide plate 70 is integrated with the inside of the guide frame 68, and when the guide frame 68 is unfolded, its front end is installed on the ground surface, and its rear end forms an inclined surface flush with the front end of the installation plate 40. I do.

Further, the folding angle is restricted as shown in FIG. 1, and the wheelchair installed here functions as a vehicle stop. Note that a ratchet mechanism or the like may be employed as a mechanism for locking at this angular position.

A handle 72 is integrally provided at the tip of the guide frame 68, and the wheelchair occupant holds the hand in the folded position to hold the riding posture in the folded position.

Reference numeral 74 in FIGS. 1 and 2 denotes a stand brake that is tiltably attached to both sides of the installation table 12 via a shaft 76, and details thereof are omitted. As in the case of the stand brake, it has two functions, that is, an inverted state and a horizontal state by reversing the spring, and has a function of holding the main body 10 and the installation stand 12 at the positions when the apparatus is stopped.

Next, a usage mode of the wheelchair transport bicycle having the above configuration will be described with reference to FIG. First, as shown in (a), when the wheelchair 78 is placed on the installation table 12, the guide frame 68 is developed. At this time, the stand brake 74 is applied to stop the vehicle body. In this state, if the caregiver [a] turns the wheelchair 78 backward and pulls up the passenger [b] to the installation stand 12 side, the wheelchair 78 will not move. Moves rearward along the inclined surface of the guide plate 70 and is installed on the installation plate 40 with its front and rear wheels placed. In this state, the guide frame 6 is folded as shown in (b), locked in this state, and after releasing the stand brake 74, the caregiver [A] pedals on the main body 10 by pedaling. The wheelchair 78 can be carried. In places where a load is applied, such as a slope, the vehicle can be moved by the assisting power of the assist motor drive unit 32 without feeling a slight load.

In the embodiment, explanations of brakes and other essential equipment for the bicycle have been omitted, but it goes without saying that equipment other than the essential parts of the present invention is equivalent to a normal bicycle or a three-wheeled bicycle. .

[0031]

[Effect of the invention]

 As described above in detail in the embodiment, according to the wheelchair transport bicycle according to the present invention, the existing wheelchair can be easily transported by bicycle without any modification, and it is not necessary to manufacture the wheelchair. Since only the front side of the bicycle or tricycle needs to be modified, the production cost is low and versatility can be increased.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a wheelchair transport bicycle according to the present invention.

FIG. 2 is a plan view of the bicycle.

FIG. 3 is a partial perspective view showing a connection structure between a main body of the bicycle and an installation stand.

FIG. 4 is an enlarged explanatory view of a portion A in FIG. 3;

FIGS. 5A and 5B are explanatory diagrams showing a use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bicycle main body 12 Wheelchair setting stand 14 Rear wheel 16 Saddle 18 Pedal 20 Steering handle 22 Frame 24 Front wheel 32 Motor drive unit 68 Guide frame 74 Brake stand 78 Wheelchair

Claims (6)

[Utility model registration claims] 1. A bicycle body in which a rear wheel, a saddle, a pedal, and a steering wheel are provided on a frame; a bicycle body connected to a front side of the bicycle body; and one wheelchair mounted thereon. A wheelchair transport bicycle comprising: an installation base; and a pair of front wheels that are arranged on the left and right sides of the installation base and that can be steered in connection with the steering wheel. 2. A guide frame is provided on the front side of the installation base so as to be foldable and deployable, and in a deployed state of the guide frame, its tip lands to form an inclined guide passage continuous with the installation base, and 2. The wheelchair transport bicycle according to claim 1, wherein in a folded state, the wheelchair function of the mounted wheelchair is also used. 3. The wheelchair transport bicycle according to claim 1, wherein the installation base is provided with a bicycle parking brake. 4. An electric motor for assisting which rotates in connection with a driving mechanism for transmitting the rotational driving force of the pedal to the rear wheel, and a battery fixed to an appropriate position of a frame and supplying power to the electric motor. The wheelchair transport bicycle according to any one of claims 1 to 3, wherein 5. The wheelchair transport bicycle according to claim 1, wherein the rear wheels are two wheels. 6. The wheelchair transport bicycle according to claim 1, wherein the bicycle main body and the installation base are detachably connected to each other.