JP4323557B1 - Tricycle - Google Patents

Abstract

The present invention relates to a three-wheeled bicycle, and in particular, can change the form from a three-wheeled bicycle that is easy to stand on its own to a compact three-wheeled carry car or a three-wheeled wheelchair, and in that case, the operation is simple and easy. It is designed to be surely performed.
According to the present invention, a front wheel side frame having a front wheel, a handle, a handle shaft, and the like, and a rear wheel side frame having a rear wheel, a pedal, a crankshaft, a saddle, and the like are determined for each form by a lock means. It can be used as a self-supporting three-wheeled bicycle by connecting the two frames away from each other, and can be used as a self-supporting three-wheeled bicycle. The vehicle can be transported as a car, and the saddle and the handle are made to be low and in the opposite direction, and the frames can be used as a wheelchair by connecting them at an intermediate position.
[Selection] Figure 2

Description

The present invention relates to a three-wheeled bicycle, and in particular, can change the form from a three-wheeled bicycle to a three-wheeled wheelchair or a three-wheeled carry car .

2. Description of the Related Art Conventionally, a three-wheeled bicycle with two front wheels and one rear wheel and a three-wheeled bicycle with two front wheels and one rear wheel are known (see, for example, Patent Documents 1 and 2).
In addition, in a three-wheeled bicycle with one front wheel and two rear wheels, it is known that the distance between the left and right rear wheels is increased and stable when riding, and the parking space is reduced by narrowing the distance between the rear wheels when parking. (For example, refer to Patent Document 2).

Conventionally, in folding motorcycles, brackets that rotate integrally with the handle shaft are provided at the bottom of the handle frame that rotatably supports the handle shaft, and cylinders are attached to the left and right hinges of the bracket, respectively. Each of the cylinders is provided with a support rod that rotatably supports a wheel half that is divided into two by a plane perpendicular to the axis of rotation of the front wheel via a suspension. There is known one that is positioned on both sides of a wheel so that it is self-supporting in a folded state to facilitate movement (see, for example, Patent Document 3).
JP-A-8-53091 Japanese Patent Laid-Open No. 2001-10577 Japanese Patent Laid-Open No. 2004-182019

The front two-wheel rear one-wheel three-wheeled bicycle described in Patent Document 1 has improved driving performance such as cornering, but has a problem that the form cannot be changed to other uses other than the three-wheeled bicycle. .
Moreover, although the front 1 wheel rear 2 wheel tricycle described in patent document 2 can reduce the space | interval parking place by narrowing the space | interval of a rear wheel at the time of parking, a form is used for other uses other than a tricycle. There was a problem that it could not be changed.

Furthermore, the folding two-wheeled bicycle described in Patent Document 3 is made to be easy to move by allowing the wheel half to be positioned on both sides of the rear wheel in the folded state so as to be independent in the folded state. Therefore, the form has been changed so that it can be moved as if it were a carry car, but there was a problem that the folding structure was complicated.
In particular, there is a problem that the structure in which the front wheel is divided into two by a plane perpendicular to the rotation axis and a support rod for rotatably supporting the wheel half is provided is complicated.

The present invention is intended to solve such conventional problems configuration had, autonomous in the Miwa, while the ride easy bicycle leverages Miwa, form a wheelchair and carry a car The purpose is to make it versatile by changing it.

The present invention according to claim 1 includes a left and right front wheel, a rear wheel, a steering device that steers the direction of the front wheel, a saddle, a drive device that has a pedal and a crankshaft and drives the rear wheel, and a main frame. In the three-wheel bicycle with two front wheels and one rear wheel
A main frame is formed from a front frame to which front wheels and a steering device are attached, and a rear frame to which rear wheels, a saddle and a drive device are attached.
The front frame rotatably supports the steering shaft of the steering device, and attaches a front wheel shaft that rotatably supports the front wheel to the lower end, and a first connection portion and a second connection portion that are fixed to the rear frame, The first connection part is provided below and the second connection part is provided via a connection arm of a predetermined length that is rotatably supported at a position above the first connection part,
The steering shaft of the steering device is formed so that the length can be adjusted, and the steering wheel can change the front-rear direction in the horizontal direction.
The rear frame is formed from a first arm, a rear wheel frame,
The first arm is provided with an arcuate shape having an upper end positioned above the rear wheel side, a lower end positioned on the front wheel side , and a center positioned on the front frame side, and an outer tube portion positioned in the center in the vertical direction And, the inner tube portion that is slidable in the outer tube portion and extends downward, and the inner tube portion that is slidable in the middle tube portion and extends upward are formed in triplicate,
The saddle fixed to the upper end of the inner pipe part in the first arm can change the front and rear direction in the horizontal direction, and the height of the saddle can be adjusted by sliding the inner pipe part and adjusting the vertical length of the first arm. The adjustable form,
A first fixing portion is provided at the lower end of the middle tube portion of the first arm to be fixed to the first connection portion of the front frame, and the outer tube portion of the first arm is obliquely upward by a predetermined distance from the first fixing portion. A second fixing portion that can be fixed to the second connecting portion, and a fourth fixing portion that can fix the second connecting portion at a second predetermined position obliquely above the second fixing portion;
The rear wheel frame is fixed to the outer tube portion of the first arm so that the position of the rear wheel can be adjusted, and the distance between the front wheel and the rear wheel is set to the first position where the first length is opened, and the third length Now, in the third position where the legs are opened, it is fixed to the outer tube in the first arm,
The second connecting portion is formed with a locking means that can be released and locked in both the second fixing portion and the fourth fixing portion, and the first arm with the first connecting portion and the first fixing portion as fulcrums. The tip of the inner pipe part in is coupled so as to be rotatable to the front frame side,
The pedal is formed so that both the left and right sides can be fixed downward,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position so that it can be used as a three-wheel bicycle with two front wheels and one rear wheel. In addition, the second connecting portion is coupled to the fourth fixing portion by the locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame is rotated to the front wheel side to Fix to the outer tube part of the first arm at three positions, adjust the saddle and handle height low, turn them to the rear wheel side, and fix the pedals downward on both the left and right sides. This is a tricycle that can be used as a wheelchair.

The present invention according to claim 2, in addition to the configuration of the present invention according to claim 1, the outer tube portion definitive first arm, fixed to the second connecting portion from the second fixing portion in a first predetermined position obliquely upward Possible third fixed part,
The rear wheel frame has a distance between the front wheel and the rear wheel, the first position where the leg is opened with the first length, the second position where the leg is opened with the second length, and the third position where the leg is opened with the third length. It is formed so that it can be fixed to the outer tube part of the first arm at the position,
The second connecting part is formed with locking means that can be released and locked in any of the second fixing part, the third fixing part and the fourth fixing part, and the first connecting part and the first fixing part are As a fulcrum, the tip of the inner tube part in the first arm is coupled to be rotatable to the front frame side,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position so that it can be used as a front two-wheel rear one-wheel tricycle. The second connecting portion is coupled to the third fixing portion by the locking means, the first arm is turned to the front frame side by a first predetermined angle, and the rear wheel frame is turned to the front wheel side to move to the second position. The first arm can be transported as a carry car using three wheels by being fixed to the outer tube portion of the first arm, and the second connection portion is coupled to the fourth fixing portion by a locking means, and the first arm is connected to the front frame side. And the rear wheel frame is rotated to the front wheel side and fixed to the outer tube portion of the first arm at the third position, and the height of the saddle and the handle is adjusted to be low. toward the rear wheel side orientation, solid downward both the right and left pedals Is a three-wheeled bicycle, which was available as a wheelchair before one wheel after the two-wheel and.

According to a third aspect of the present invention, there is provided a front wheel, left and right rear wheels, a steering device for steering the direction of the front wheel, a saddle, a drive device having a pedal and a crankshaft and driving a rear wheel, and a main frame. In the three-wheeled bicycle with one front wheel and two rear wheels
A main frame is formed from a front frame to which front wheels and a steering device are attached, and a rear frame to which rear wheels, a saddle and a drive device are attached.
The front frame rotatably supports a handle shaft in a steering device having a fork that rotatably supports a front wheel at a lower end, and includes a first connection portion and a second connection portion that are fixed to the rear frame. One connection part is provided below, and the second connection part is provided via a connection arm of a predetermined length that is rotatably supported at a position above the first connection part,
The steering shaft of the steering device is formed so that the length can be adjusted, and the steering wheel can change the front-rear direction in the horizontal direction.
The rear frame is formed from a first arm, a rear wheel frame,
The first arm is provided with an arcuate shape having an upper end positioned above the rear wheel side, a lower end positioned on the front wheel side , and a center positioned on the front frame side, and an outer tube portion positioned in the center in the vertical direction And, the inner tube portion that is slidable in the outer tube portion and extends downward, and the inner tube portion that is slidable in the middle tube portion and extends upward are formed in triplicate,
The saddle fixed to the upper end of the inner pipe part in the first arm can change the front and rear direction in the horizontal direction, and the height of the saddle can be adjusted by sliding the inner pipe part and adjusting the vertical length of the first arm. The adjustable form,
A first fixing portion is provided at the lower end of the middle tube portion of the first arm to be fixed to the first connection portion of the front frame, and the outer tube portion of the first arm is obliquely upward by a predetermined distance from the first fixing portion. A second fixing portion that can be fixed to the second connecting portion, and a fourth fixing portion that can fix the second connecting portion at a second predetermined position obliquely above the second fixing portion;
The rear wheel frame is fixed to the outer tube portion of the first arm so that the position of the rear wheel can be adjusted, and the distance between the front wheel and the rear wheel is set to the first position where the first length is opened, and the third length Now, in the third position where the legs are opened, it is fixed to the outer tube in the first arm,
The second connecting portion is formed with a locking means that can be released and locked in both the second fixing portion and the fourth fixing portion, and the first arm with the first connecting portion and the first fixing portion as fulcrums. The tip of the inner pipe part in is coupled so as to be rotatable to the front frame side,
The pedal is formed so that both the left and right sides can be fixed downward,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position, so that it can be used as a front one wheel and two rear wheels. In addition, the second connecting portion is coupled to the fourth fixing portion by the locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame is rotated to the front wheel side to Fix to the outer pipe part of the first arm at three positions, and further adjust the saddle and handle height to a lower position, turn these directions toward the rear wheel , and fix the pedals downward on both the left and right sides. This is a tricycle that can be used as a single wheelchair.

According to a fourth aspect of the present invention, in addition to the configuration of the present invention according to any one of the first to third aspects, the locking means formed in the second connection portion is an engagement hole formed in the outer tube portion of the first arm . the engaging pin for engaging an elastic member that acts to fit the engagement pin into engagement hole, a three-wheel bicycle that has an operating member for operating so as to disengage the engaging pin from the engaging hole is there.

In the first aspect of the present invention, the second connecting portion is coupled to the second fixing portion by the locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position, thereby It can be used as a one-wheeled three-wheel bicycle, and the second connecting portion is coupled to the fourth fixing portion by a locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame Rotate to the front wheel side and fix it to the outer tube part of the first arm at the third position, adjust the saddle and handle to a low height, turn these directions to the rear wheel side, and lower the pedal both left and right Because it is fixed and can be used as a wheelchair for the front 1 wheel and the rear 2 wheels, it can be used as a wheelchair for the front 1 wheel and the rear 2 wheels while making it easy to ride by making it a tricycle with the front 2 wheels and the rear 1 wheel. It can be done.

According to a second aspect of the present invention, in addition to the effect of the present invention according to the first aspect , the second connecting portion is coupled to the second fixed portion by a locking means, and the rear wheel frame is moved to the first arm at the first position. It can be used as a three-wheel bicycle with two front wheels and one rear wheel, and the second connecting portion is coupled to the third fixing portion by a locking means, and the first arm is rotated to the front frame side by a first predetermined angle. In addition, by rotating the rear wheel frame to the front wheel side and fixing it to the outer tube part of the first arm at the second position, it can be transported as a carry car using three wheels, and the second connecting part is a locking means To the fourth fixed portion to rotate the first arm to the front frame side by a second predetermined angle, and to rotate the rear wheel frame to the front wheel side and at the third position the outer tube portion of the first arm And adjust the height of the saddle and handle to a low Toward the rear wheel side can, from the available as wheelchair 1 wheeled two rear wheels before and fixed downward both the right and left pedals, can facilitate transport as key Yarika, bus, public, such as a train It also has the effect that it can be brought into transportation.

According to the third aspect of the present invention, the second connecting portion is coupled to the second fixing portion by the locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position, and the front one wheel is rearward. It can be used as a two-wheeled three-wheel bicycle, and the second connecting portion is coupled to the fourth fixing portion by a locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame was fixed to the outer tube portion of the first arm in a third position by rotating the front wheel, further, to adjust lower the height of the saddle and the handle, towards these orientations to the rear wheel side, the left and right both pedals Since it is fixed downward and can be used as a wheelchair for the front two wheels and the rear wheel, it can be used as a tricycle with two wheels for the front and rear wheels, making it easy to ride and making it a wheelchair for the front and rear wheels. Can also be used.

According to a fourth aspect of the present invention, in addition to the effect of the present invention according to any one of the first to third aspects, the locking means formed in the second connection portion is an engagement hole formed in the outer tube portion of the first arm . The three-wheeled bicycle includes an engagement pin that engages with the engagement pin, an elastic member that acts to fit the engagement pin into the engagement hole, and an operation member that operates to disengage the engagement pin from the engagement hole. Therefore, the operation of changing the form from a wheelchair to a carry car can be performed easily and reliably.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 10 are drawings according to a first embodiment of the present invention. FIG. 1 is a front view of a three-wheel bicycle having two front wheels and one rear wheel, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 4 is a partial view taken along the arrow A in FIG. 2, FIG. 5 is an explanatory view of the locking means, FIGS. 6 to 8 are views showing a steering device, and FIG. FIG. 7 is a partially enlarged view of FIG. 6, FIG. 8 is a partially enlarged perspective view of FIG. 7, FIG. 9 is a side view in which the form is changed to a carry car, and FIG. It is the side view which changed the form into the wheelchair of a wheel.
11 to 14 are drawings according to the second embodiment of the present invention, FIG. 11 is a side view of a three-wheeled bicycle with one front wheel and two rear wheels, and FIG. 12 is a part of FIG. 11 omitted. FIG. 13 is a side view in which the form is changed to a carry car, and FIG. 14 is a side view in which the form is changed to a wheelchair having two front wheels and one rear wheel.

Based on FIGS. 1-10, the three-wheeled bicycle which concerns on 1st embodiment of this invention is demonstrated.
Reference numeral 1 denotes a three-wheel bicycle having two front wheels and one rear wheel, and includes a left and right front wheel 2, a rear wheel 3, a steering device 4 for steering the direction of the front wheel 2, a saddle 5, a pedal 6, and a crankshaft 7. A drive device 8 for driving the rear wheel 3 and a main frame 9 are provided.

The main frame 9 is formed of a front frame 10 to which the left and right front wheels 2 and the steering device 4 are attached, and a rear frame 11 to which the rear wheels 3, the saddle 5 and the drive device 8 are attached.
The front frame 10 rotatably supports the handle shaft 12 of the steering device 4, and a front wheel shaft 2a that rotatably supports the front wheel 2 is attached to the lower end.

Further, as shown in FIG. 2, the front frame 10 has a handle for adjusting the length of the handle shaft 12 at the upper end and rotating the handle shaft 12 so that the handle 12a can be changed in the front-rear direction in the horizontal direction. The adjustment screw 12b is provided, and the shaft diameter of the front frame 10 is formed so that the lower portion 10a is larger than the upper portion 10b.
A frame-shaped front wheel support frame 14 is provided so as to protrude rearward in the lower portion 10a of the front frame 10, and this front wheel support frame 14 constitutes a part of the front frame 10, and this front wheel support frame 14 is fixed to the rear frame 11 by the first connection portion 15 and the second connection portion 16.

A first connection portion 15 is provided below the front wheel support frame 14, and a connection arm 17 made of a coil spring having a predetermined length is rotatably supported by a support pin 14 a at a position above the first connection portion 15 in the front wheel support frame 14. The second connecting portion 16 is provided at the end of the connecting arm 17.
Further, a front wheel steering box 18 is provided below the front wheel support frame 14, as shown in FIG. 6 from the branching portion 19 near the position where the first connection portion 15 is provided toward the front wheel steering box 18. A reinforcing frame 14 b branched at an angle of 90 degrees is formed, and the reinforcing frame 14 b is fixed to the front wheel steering box 18.

Rear frame 11 includes a first arm 20, is formed from the rear wheel frame 21..
The first arm 20 has an upper end is positioned at the lower end located to the rear wheel 3 side upper front wheel 2 side, and, together with the center provided inclined in an arc shape located on the front frame 10 side, a vertical center The outer tube portion 20a, the inner tube portion 20b slidable in the outer tube portion 20a and extending downward, and the inner tube portion 20c slidable in the middle tube portion 20b and extending upward are formed in triplicate. ing.

The saddle 5 fixed to the upper end of the inner tube portion 20c in the first arm 20 is formed so that the front / rear direction can be changed in the horizontal direction by the adjusting screw 5a, and adjusted by sliding the inner tube portion 20c in the middle tube portion 20b. The vertical length of the first arm 20 can be adjusted by the fixing ring 20d, and the height of the saddle 5 can be adjusted.
A first fixing portion 22 is provided at the lower end of the middle tube portion 20b in the first arm 20 to be fixed to the first connection portion 15 of the front frame 10, and the outer tube portion 20a in the first arm 20 has this first fixing portion. A second fixing portion 23 that can be fixed to the second connecting portion 16 is provided obliquely upward at a first predetermined distance from 22, and the second connecting portion 16 can be fixed to a first predetermined position obliquely upward from the second fixing portion 23. A third fixing portion 24 is provided, and a fourth fixing portion 25 capable of fixing the second connection portion 16 is provided at a second predetermined position obliquely above the second fixing portion 23 .

The rear wheel frame 21 is fixed to the outer tube portion 20a of the first arm 20 so that the position of the rear wheel 3 can be adjusted.
That is, the rear wheel frame 21 has a first position where the distance between the front wheel shaft 2a supporting the left and right front wheels 2 and the rear wheel 3 is opened by the first length L1, and a first length shorter than the first length L1. The outer tube portion of the first arm 20 at the second position opened by two lengths L2 and the third position opened by the third length L3 intermediate between the first length L1 and the second length L2. 20a is formed so as to be fixable by the lock means 26 with the first gauge.

The second connection portion 16 provided on the front wheel support frame 14 constituting a part of the front frame 10 is connected to the second pipe 16 provided on the outer tube portion 20a of the first arm 20 forming a part of the rear frame 11. Lock means 27 that can be released and locked is formed in any of the fixing portion 23, the third fixing portion 24, and the fourth fixing portion 25.

The front frame 10 and the rear frame 11 forming the main frame 9 are a first connection portion 15 provided in the front wheel support frame 14 and a first fixing portion 22 provided at the lower end of the middle tube portion 20b in the first arm 20 . With the first connecting portion 15 and the first fixing portion 22 as fulcrums, the tip of the inner tube portion 20c of the first arm 20 is coupled by the lock means 28 with the second gauge so that it can turn to the front frame 10 side. is doing.
Next, an example of the structure of the second fixing portion 23, the third fixing portion 24, and the fourth fixing portion 25 that engages with the locking means 27 and the locking means 27 will be described based on FIGS. 5a to 5d.

5a and 5b are explanatory views showing a section along the tube axis of the outer tube portion 20a of the first arm 20 in the locked state and the released state, and FIGS. 5c and 5d are tubes of the outer tube portion 20a in the locked state. It is explanatory drawing which shows the partial cross section which cross | intersects an axis | shaft, As shown to FIG. 5 a-FIG. 5 d, the cross section T-shaped guide rail 29 is formed in the upper surface side of the outer tube | pipe part 20a.
As shown in FIGS. 5a to 5d, the guide rail 29 of the outer tube portion 20a has a second engagement hole 23a at a position that becomes the second fixing portion 23 shown in FIG. 2, and a third fixing portion shown in FIG. A third engagement hole 24a is formed at a position corresponding to 24, and a fourth engagement hole 25a is formed at a position corresponding to the fourth fixing portion 25 shown in FIG.

The locking means 27 formed on the second connection portion 16 at the end of the connection arm 17 in the front wheel support frame 14 is formed of a coupling pin portion 30 and an operation portion 31.
The coupling pin portion 30 includes a main body portion 30a fixed to the end portion of the connection arm 17 by welding, and a holding portion 30b formed to be slidable across the T-shaped guide rail 29. The upper part of the part 30b is fixed to the main body part 30a with bolts 30c and nuts 30d.

The operation unit 31 has a narrow cylindrical shape with a cover 31b having an opening 31a below, an engagement pin 31c provided so as to be able to enter and exit from the opening 31a of the cover 31b, and one end on the lower inner surface of the cover 31b. An operation arm 31e rotatably supported by a fulcrum pin 31d, a connection pin 31f connecting the engagement pin 31c and the operation arm 31e, an annular operation member 31g fixed to the other end of the operation arm 31e, And an elastic member 31h made of a leaf spring fixed to the bottom surface of the operation arm 31e and having one end fixed to the inner surface of the cover 31b.
Then, the second engagement hole 23 a of the second fixing portion 23, the third engagement hole 24 a of the third fixing portion 24, and the fourth fixing portion 25 provided in the outer tube portion 20 a of the first arm 20 by the locking means 27. The second connection portion 16 provided on the front wheel support frame 14 constituting a part of the front frame 10 is fixed to any one of the fourth engagement holes 25a.

The release of the second connecting portion 16 to the second fixing portion 23, the third fixing portion 24 or the fourth fixing portion 25 by the locking means 27 is performed by the user of the three-wheeled bicycle 1 inserting his / her finger into the operation member 31g. The engaging pin 31c is lifted against the elastic force of 31h and released from the second engaging hole 23a, the third engaging hole 24a, or the fourth engaging hole 25a.
Next, the locking of the second connecting portion 16 to the second fixing portion 23, the third fixing portion 24 or the fourth fixing portion 25 by the locking means 27 is performed by selecting the selected second engaging hole 23a and third engaging hole 24a. Alternatively, if the operation member 31a is released at the position of the fourth engagement hole 25a, the second engagement hole 23a, the third engagement hole 24a, or the fourth engagement selected by the engagement pin 31c by the elastic force of the elastic member 31h. It fits into the hole 25a, and the second connecting portion 16 is fixed to any one of the second fixing portion 23, the third fixing portion 24, and the fourth fixing portion 25 selected.

Next, an example of a mechanism for steering the direction of the left and right front wheels 2 by turning the handle shaft 12 rotatably supported by the front frame 10 by operating the handle 12a forward and backward is based on FIGS. explain.
A front wheel steering box 18 is provided at a central position between the left and right front wheels 2 below the front wheel support frame 14 constituting a part of the front frame 10.

As shown in FIG. 1, the front wheel steering box 18 has a horizontal bottom surface and is inclined upward in the center, and an upward bulging portion 18a is formed in the central portion. A light 18b connected to a generator (not shown) is provided on the front surface, and a bumper 18c is provided on the lower front side.
A front wheel shaft 2a is supported on the left and right side portions 18d of the front wheel steering box 18, and a direction steering bar 12c connected to the handle shaft 12 is supported so as to be movable in the axial direction.

The front wheel shaft 2a is provided with fixed front wheel bearing bars 2b that are perpendicular to the front wheel shaft 2a and are provided at right and left ends.
The front wheel bearing bar 2b supports the wheel receiving ring 2c so as to be rotatable up and down across the front wheel shaft 2a, and fixes the positioning member 2d of the wheel receiving ring 2c.

A semi-cylindrical front wheel rotation receiving shaft mounting member 2e is fixed to the upper and lower wheel receiving rings 2c.
The front wheel rotation receiving shaft 2f is fixed to the front wheel rotation receiving shaft mounting member 2e in a direction in which the end of the front wheel shaft 2a is extended.

The left and right front wheels 2 are attached to the front wheel rotation receiving shaft 2f via a bearing by a fixing member 2g.
6-8, 2h is a tire, and 2i is a rim (in the drawings excluding FIGS. 6-8, the sign of the tire 2h and the illustration of the rim 2i are omitted).

As shown in FIG. 6, the direction steering arm 12d fixed horizontally and orthogonal to the handle shaft 12 is connected to the direction steering bar 12c via a length adjusting mechanism 12e connected to the end of the direction steering arm 12d. is doing.
Both ends of the direction steering bar 12c are connected to the pendulum arm 12g via the link mechanism 12f, the other end of the pendulum arm 12g is connected to the front wheel rotation receiving shaft mounting member 2e, and the pendulum arm 12g is divided into two parts. A cylindrical portion 12h and a shaft portion 12i that can be moved in and out of the cylindrical portion 12h are formed in the connecting portion so that the length can be adjusted.

Then, by operating the handle 12a, the rotation of the handle shaft 12 is converted into the angle fluctuation of the direction steering arm 12d, and the movement of the direction steering bar 12c (up and down movement in FIG. 7) via the length adjustment mechanism 12e. And converted into angle fluctuations of the pendulum arm 12g via the link mechanism 12f.
Further, the angle fluctuation of the pendulum arm 12g is transmitted to the rotation of the front wheel rotation receiving shaft mounting member 2e, and the front wheel rotation receiving shaft 2f fixed to the front wheel rotation receiving shaft mounting member 2e is used as a fulcrum for the left and right front wheels. The direction of 2 can be manipulated.

Next, an example of the drive device 8 when used as the three-wheel bicycle 1 will be described.
The driving device 8 transmits a driving force to the crankshaft 7 when a user of the tricycle 1 steps on the pedal 6, and transmits a driving force of the crankshaft 7 to the flexible driving shaft 32. The rotational force is transmitted to the rear wheel shaft 3a rotatably supported by the rear wheel frame 21 to drive the rear wheel 3.

The driving force of the crankshaft 7 is transmitted to the driving shaft 32 by a gear mechanism 32a provided on the crankshaft 7 and the input side of the driving shaft 32, and the rotational force of the driving shaft 32 is transmitted to the rear wheel shaft 3a. This is done by a gear mechanism 32b provided on the output side of the drive shaft 32 and the rear wheel shaft 3a.
When the pedal 6 is stepped on, the driving force is transmitted to the crankshaft 7, the gear mechanism 32a, the drive shaft 32, the gear mechanism 32b, and the rear wheel shaft 3a to drive the rear wheel 3 fixed to the rear wheel shaft 3a. is there.

Next, when it can be used as a three-wheeled bicycle 1 with two front wheels and one rear wheel, when it can be used as a carry car 1a using three wheels, and when it can be used as a wheelchair 1b with two front wheels and two rear wheels Each form will be described.
First, when the three-wheeled bicycle 1 with two front wheels and one rear wheel shown in FIGS. 1 to 4 can be used, the engagement pin 31c of the lock means 27 is engaged with the second engagement hole 23a of the second fixing portion 23. By combining, the second connecting portion 16 is coupled to the second fixing portion 23, and the rear wheel frame 21 is fixed to the outer tube portion 20a of the first arm 20 at the first position.

Further, when the vehicle can be used as the carry car 1a using the three wheels shown in FIG. 9, the engagement pin 31c of the locking means 27 is engaged with the third engagement hole 24a of the third fixing portion 24, so that the first The two connecting portions 16 are coupled to the third fixing portion 24 to rotate the first arm 20 from the state of FIG. 2 to the front frame 10 side by a first predetermined angle, and the rear wheel frame 21 from the state of FIG. It rotates to the front wheel 2 side and is fixed to the outer tube portion 20a of the first arm 20 at the second position.
In this case, as shown in FIGS. 2 and 9, the rear wheel frame 21 is fixed to the upper end of the outer tube portion 20a, which is the central portion of the first arm 20, by the first gauge locking means 26. Since the positional relationship of the rear wheel frame 21 with respect to the first arm 20 changes between the case of the three-wheeled bicycle 1 and the case of the carry car 1a of FIG. 9, the outer tube portion 20a changes by sliding the middle tube portion 20b. It can be absorbed.

Further, when the vehicle can be used as a carry car 1a, the length of the handle shaft 12 is adjusted to be short so that it can be easily carried in a public transportation means such as a train, a bus, and a taxi. The length is adjusted to be short to form a compact carry car 1a.
Further, in order to reduce the distance between the tires 2h of the left and right front wheels 2 and make it compact, as shown in FIG. 6, the front wheel shaft 2a can be slid in the first outer tube 2j and the first outer tube 2j at the center. The second outer tube 2k and the shaft portion 2m slidable into the second outer tube 2k are divided, and the direction steering bar 12c is divided into the outer tube 12j and the shaft portion 12k slidable into the outer tube 12j. When transforming into the car 1a, the width of the left and right front wheels 2 can be reduced.

The width of the left and right front wheels 2 when used as the three-wheel bicycle 1 is 60 cm, while the width when deformed to the carry car 1a is made compact to 45 cm.
In addition, the handle 12a can be changed in the horizontal direction so that the direction of the handle 12a can be changed according to the user's preference when the handle 12a is used as the carry car 1a.

And since the 1st arm 20 is inclined and provided in the circular arc shape where the upper end is located above the rear wheel 3 side, the lower end is located on the left and right front wheels 2 side, and the center is located on the front frame 10 side. When used as the carry car 1a of FIG. 9, the saddle 5 can be made closer to the handle 12a side to be compact.
The arcuate radius is 70 cm in this embodiment, but is preferably 60 cm to 80 cm.

In addition, when it can be used as the carry car 1a, it is particularly desirable to reduce the size and weight, so that the main parts are made of an aluminum alloy as much as possible, and various pins, bolts, nuts and screws are made of stainless steel. It is.
In addition, the parts that can be made cylindrical for weight reduction are made cylindrical.

Furthermore, when the wheelchair 1b can be used as the front wheel 1 and the rear wheel 2 shown in FIG. 10, the engagement pin 31c of the lock means 27 is engaged with the fourth engagement hole 25a of the fourth fixing portion 25. 2, the second connecting portion 16 is coupled to the fourth fixing portion 25, the first arm 20 is rotated from the state of FIG. 2 to the front frame 10 side by a second predetermined angle, and the rear wheel frame 21 is It is rotated from the state to the front wheel 2 side and fixed to the outer tube portion 20a of the first arm 20 at the third position.
In this case, as shown in FIGS. 2 and 10, the rear wheel frame 21 is fixed to the upper end of the outer tube portion 20a, which is the center portion of the first arm 20, by the first gauge locking means 26. Since the positional relationship of the rear wheel frame 21 with respect to the first arm 20 changes between the case of the three-wheel bicycle 1 and the case of the wheelchair 1b of the front one wheel and the rear two wheels in FIG. 10, the outer tube portion 20a is the middle tube portion. 20b is slid so that the change can be absorbed.

Furthermore, when making it usable as the wheelchair 1b, the length of the first arm 20 is adjusted to be short, the height of the saddle 5 is adjusted to be low, and the direction of the saddle 5 is directed toward the rear wheel 3, In addition, the pedal 6 can be fixed to the lower side as shown in FIG. 10 for use by the user of the wheelchair 1b.
Further, the length of the handle shaft 12 is adjusted to be short to adjust the height of the handle 12a to be low, the direction of the handle is directed to the rear wheel 3, and the handle 12a is connected to the handle shaft 12 at the coupling portion. A handle angle adjusting member 12m that can adjust the angle with the shaft 12a is provided, and the tip of the handle 12a is inclined downward to make it easy to push the wheelchair 1b.

In the case of this wheelchair 1b, it was expressed as the front 1 wheel and the rear 2 wheels, but this expression is seen from the user when using it as the wheelchair 1b. The terms and symbols used in the three-wheeled bicycle 1 are used.
Therefore, in the case of the three-wheeled bicycle 1 and the wheelchair 1b, the description is made with 2 as the front wheel and 3 as the rear wheel.

In the first embodiment described above, it can be used as a three-wheel bicycle 1 with two front wheels and one rear wheel, and can be used as a carry car 1a using three wheels and a wheelchair 1b with two front wheels and two rear wheels. However, it can be used as the three-wheeled bicycle 1 with two front wheels and one rear wheel, and can be used as either a carry car 1a using three wheels or a wheelchair 1b with two front wheels and two rear wheels.
When it can be used as a three-wheeled bicycle 1 with two front wheels and one rear wheel, and when it can be used as a carry car 1a using three wheels, a configuration used only as a wheelchair 1b with two front wheels and one rear wheel is omitted. It is.

When it can be used as the front two-wheel rear-wheel three-wheeled bicycle 1 and can be used as the front one-wheel rear-wheelchair 1b, the configuration used only as the carry car 1a using three wheels is omitted. It is.
In the above embodiment, the drive device 8 is a shaft drive type including the drive shaft 32, the gear mechanism 32a, the gear mechanism 32b, and the like, but may be a method using a timing belt or a chain.

In the embodiment described above, the locking means 27 formed on the second connection portion includes the engagement pin 31c that engages with the engagement holes 23a, 24a, and 25a formed on the outer tube portion 20a of the first arm 20. An elastic member 31h that operates to fit the engagement pin 31c into the engagement holes 23a, 24a, and 25a, an operation member 31g that operates to disengage the engagement pin 31c from the engagement holes 23a, 24a, and 25a, and the like. Of course, various fixing and releasing means can be employed.

Next, a three-wheeled bicycle according to a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the front two-wheel rear one-wheel three-wheel bicycle 1 in the first embodiment is changed to a front one-wheel rear two-wheel three-wheel bicycle.

Hereinafter, configurations similar to those of the first embodiment are denoted by the same reference numerals, description thereof is omitted or simplified, and configurations different from those of the first embodiment are described.
In the second embodiment, the configuration of the steering device is simplified with respect to the three-wheeled bicycle 1 of the front two wheels and the rear one wheel by adopting a three-wheeled bicycle of the front one wheel and the rear two wheels. It is mainly a different structure that the structure became complicated.

As shown in FIGS. 11 and 12, reference numeral 51 denotes a three-wheel bicycle having one front wheel and two rear wheels, and includes a front wheel 52, left and right rear wheels 53, and a steering device 54 that steers the direction of the front wheel 2.
The front frame 10 rotatably supports the handle shaft 12 of the steering device 54 and branches from the handle shaft 12 a fork 55 in which the front wheel 52 is rotatably supported by the front wheel shaft 52a at the lower end of the lower portion 10a. Formed.

An inverted triangular frame-shaped front wheel support frame 14c is provided at the lower portion 10a of the front frame 10 so as to protrude rearward.
A rear wheel shaft 53a having left and right rear wheels 53 fixed thereto is rotatably supported on the rear wheel frame 21.

The driving device 56 transmits a driving force to the crankshaft 7 when a user of the three-wheeled bicycle 51 steps on the pedal 6, and transmits a driving force of the crankshaft 7 to the flexible driving shaft 32. The rotational force is transmitted to the rear wheel shaft 53a that is rotatably supported by the rear wheel frame 21 to drive the left and right rear wheels 53.
The driving force of the crankshaft 7 is transmitted to the driving shaft 32 by a gear mechanism 32a provided on the crankshaft 7 and the input side of the driving shaft 32, and the rotational force of the driving shaft 32 is transmitted to the rear wheel shaft 53a. This is done by a gear mechanism 32b provided on the output side of the drive shaft 32 and the rear wheel shaft 53a.

When the pedal 6 is depressed, the driving force is transmitted to the crankshaft 7, the gear mechanism 32a, the drive shaft 32, the gear mechanism 32b, and the rear wheel shaft 53a to drive the left and right rear wheels 53 fixed to the rear wheel shaft 53a. It is.
Next, in the case where the vehicle can be used as the three-wheeled bicycle 51 of the front one wheel and the rear two wheels shown in FIG. 11 and FIG. 12, the case where the vehicle can be used as the carry car 51a using the three wheels shown in FIG. Since each form in the case where it can be used as a wheelchair 51b for two wheels and one wheel is the same as that of the first embodiment, the description thereof is omitted.

In the second embodiment described above, it can be used as a three-wheeled bicycle 51 with two front wheels and a rear wheel, and can be used as a carry car 51a using three wheels and a wheelchair 51b with one rear wheel and one rear wheel. However, it may be used as the three-wheeled bicycle 51 of the front one wheel and the rear two wheels, and may be used as either the carry car 51a using the three wheels or the wheelchair 51b of the front two wheels and the rear one wheel.
When it can be used as the three-wheeled bicycle 51 of the front one wheel and the rear two wheels and can be used as the carry car 51a using three wheels, the configuration used only as the wheelchair 51b of the front two wheels and the rear wheel is omitted. It is.

When it can be used as a wheelchair 51b with one front wheel and two rear wheels, and a wheelchair 51b with one front wheel and one rear wheel, the configuration used only as a carry car 51a using three wheels is omitted. It is.
In the second embodiment, the driving of the left and right rear wheels 53 by the driving device 56 is synchronized by the rear wheel shaft 53a. Therefore, when turning, one rear wheel is caused by the difference in the length of the inner and outer trajectories of the left and right rear wheels 53. In order to eliminate the slip, an operating gear may be incorporated in the gear mechanism 32b.

  Further, in the second embodiment, the description is omitted, but when used as the carry car 51a, the width of the left and right rear wheels 53 may be reduced as necessary to achieve compactness.

1 is a front view of a three-wheeled bicycle with two front wheels and one rear wheel according to a first embodiment of the present invention. The side view of FIG. The top view which abbreviate | omitted a part of FIG. The partial view by A arrow view of FIG. Explanatory drawing of a locking means. The top view which made a part of steering apparatus the cross section. The elements on larger scale of FIG. FIG. 8 is a partially enlarged perspective view of FIG. 7. The side view which changed the form into the carry car. The side view which changed the form into the wheelchair of the front 1 wheel rear 2 wheel. The side view of the three-wheeled bicycle of the front 1 wheel rear 2 wheel which concerns on 2nd embodiment of this invention. The top view which abbreviate | omitted a part of FIG. The side view which changed the form into the carry car. The side view which changed the form into the wheelchair of the front 2 wheel 1 wheel.

DESCRIPTION OF SYMBOLS 1 Three-wheeled bicycle 1a Carry car 1b Wheelchair 2 Left and right front wheel 2a Front wheel shaft 3 Rear wheel 3a Rear wheel shaft 4 Steering device 5 Saddle 6 Pedal 7 Crankshaft 8 Drive device 9 Main frame 10 Front frame 11 Rear frame 12 Handle shaft 12a Handle 15 1st One connection portion 16 Second connection portion 17 Connection arm 20 First arm
20a outer pipe
20b Middle pipe
20c Inner pipe portion 21 Rear wheel frame 22 First fixing portion 23 Second fixing portion 24 Third fixing portion 25 Fourth fixing portion 27 Locking means 31c Engaging pin 31g Operation member 31h Elastic member 32 Drive shaft 32a Gear mechanism 32b Gear mechanism 51 Three-wheeled bicycle 51a Carry car 51b Wheelchair 52 Front wheel 52a Front wheel shaft 53 Left and right rear wheels 54 Steering device 55 Fork 56 Drive device L1 First length L2 Second length L3 Third length

Claims (4)

A front two-wheel rear wheel including a left and right front wheel, a rear wheel, a steering device for steering the direction of the front wheel, a saddle, a drive device having a pedal and a crankshaft to drive the rear wheel, and a main frame. In a tricycle,
A main frame is formed from a front frame to which front wheels and a steering device are attached, and a rear frame to which rear wheels, a saddle and a drive device are attached.
The front frame rotatably supports the steering shaft of the steering device, and attaches a front wheel shaft that rotatably supports the front wheel to the lower end, and a first connection portion and a second connection portion that are fixed to the rear frame, The first connection part is provided below and the second connection part is provided via a connection arm of a predetermined length that is rotatably supported at a position above the first connection part,
The steering shaft of the steering device is formed so that the length can be adjusted, and the steering wheel can change the front-rear direction in the horizontal direction.
The rear frame is formed from a first arm, a rear wheel frame,
The first arm is provided with an arcuate shape having an upper end positioned above the rear wheel side, a lower end positioned on the front wheel side , and a center positioned on the front frame side, and an outer tube portion positioned in the center in the vertical direction And, the inner tube portion that can slide in the outer tube portion and extends downward, and the inner tube portion that can slide in the middle tube portion and extend upward, are formed in triplicate,
The saddle fixed to the upper end of the inner pipe part in the first arm can change the front and rear direction in the horizontal direction, and the height of the saddle can be adjusted by sliding the inner pipe part and adjusting the vertical length of the first arm. The adjustable form,
A first fixing portion is provided at the lower end of the middle tube portion of the first arm to be fixed to the first connection portion of the front frame, and the outer tube portion of the first arm is obliquely upward by a predetermined distance from the first fixing portion. A second fixing portion that can be fixed to the second connecting portion, and a fourth fixing portion that can fix the second connecting portion at a second predetermined position obliquely above the second fixing portion;
The rear wheel frame is fixed to the outer tube portion of the first arm so that the position of the rear wheel can be adjusted, and the distance between the front wheel and the rear wheel is set to the first position where the first length is opened, and the third length Now, in the third position where the legs are opened, it is fixed to the outer tube in the first arm,
The second connecting portion is formed with a locking means that can be released and locked in both the second fixing portion and the fourth fixing portion, and the first arm with the first connecting portion and the first fixing portion as fulcrums. The tip of the inner pipe part in is coupled so as to be rotatable to the front frame side,
The pedal is formed so that both the left and right sides can be fixed downward,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position so that it can be used as a three-wheel bicycle with two front wheels and one rear wheel. In addition, the second connecting portion is coupled to the fourth fixing portion by the locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame is rotated to the front wheel side to Fix to the outer tube part of the first arm at three positions, adjust the saddle and handle height low, turn them to the rear wheel side, and fix the pedals downward on both the left and right sides. A tricycle that can be used as a wheelchair. The outer tube portion in the first arm is provided with a third fixing portion capable of fixing the second connecting portion at a first predetermined position obliquely above the second fixing portion,
The rear wheel frame has a distance between the front wheel and the rear wheel, the first position where the leg is opened with the first length, the second position where the leg is opened with the second length, and the third position where the leg is opened with the third length. It is formed so that it can be fixed to the outer tube part of the first arm at the position,
The second connecting part is formed with locking means that can be released and locked in any of the second fixing part, the third fixing part and the fourth fixing part, and the first connecting part and the first fixing part are As a fulcrum, the tip of the inner tube part in the first arm is coupled to be rotatable to the front frame side,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position so that it can be used as a front two-wheel rear one-wheel tricycle. The second connecting portion is coupled to the third fixing portion by the locking means, the first arm is turned to the front frame side by a first predetermined angle, and the rear wheel frame is turned to the front wheel side to move to the second position. The first arm can be transported as a carry car using three wheels by being fixed to the outer tube portion of the first arm, and the second connection portion is coupled to the fourth fixing portion by a locking means, and the first arm is connected to the front frame side. And the rear wheel frame is rotated to the front wheel side and fixed to the outer tube portion of the first arm at the third position, and the height of the saddle and the handle is adjusted to be low. toward the rear wheel side orientation, solid downward both the right and left pedals Tricycle according to claim 1, characterized in that it has available as wheelchair 2 rear wheels before one wheel to. A front wheel, a left and right rear wheel, a steering device that steers the direction of the front wheel, a saddle, a drive device that has a pedal and a crankshaft to drive the rear wheel, and a front wheel and two rear wheels that include a main frame. In a tricycle,
A main frame is formed from a front frame to which front wheels and a steering device are attached, and a rear frame to which rear wheels, a saddle and a drive device are attached.
The front frame rotatably supports a handle shaft in a steering device having a fork that rotatably supports a front wheel at a lower end, and includes a first connection portion and a second connection portion that are fixed to the rear frame. One connection part is provided below, and the second connection part is provided via a connection arm of a predetermined length that is rotatably supported at a position above the first connection part,
The steering shaft of the steering device is formed so that the length can be adjusted, and the steering wheel can change the front-rear direction in the horizontal direction.
The rear frame is formed from a first arm, a rear wheel frame,
The first arm is provided with an arcuate shape having an upper end positioned above the rear wheel side, a lower end positioned on the front wheel side , and a center positioned on the front frame side, and an outer tube portion positioned in the center in the vertical direction And, the inner tube portion that is slidable in the outer tube portion and extends downward, and the inner tube portion that is slidable in the middle tube portion and extends upward are formed in triplicate,
The saddle fixed to the upper end of the inner pipe part in the first arm can change the front and rear direction in the horizontal direction, and the height of the saddle can be adjusted by sliding the inner pipe part and adjusting the vertical length of the first arm. The adjustable form,
A first fixing portion is provided at the lower end of the middle tube portion of the first arm to be fixed to the first connection portion of the front frame, and the outer tube portion of the first arm is obliquely upward by a predetermined distance from the first fixing portion. A second fixing portion that can be fixed to the second connecting portion, and a fourth fixing portion that can fix the second connecting portion at a second predetermined position obliquely above the second fixing portion;
The rear wheel frame is fixed to the outer tube portion of the first arm so that the position of the rear wheel can be adjusted, and the distance between the front wheel and the rear wheel is set to the first position where the first length is opened, and the third length Now, in the third position where the legs are opened, it is fixed to the outer tube in the first arm,
The second connecting portion is formed with a locking means that can be released and locked in both the second fixing portion and the fourth fixing portion, and the first arm with the first connecting portion and the first fixing portion as fulcrums. The tip of the inner pipe part in is coupled so as to be rotatable to the front frame side,
The pedal is formed so that both the left and right sides can be fixed downward,
The second connecting portion is coupled to the second fixing portion by a locking means, and the rear wheel frame is fixed to the outer tube portion of the first arm at the first position, so that it can be used as a front one wheel and two rear wheels. In addition, the second connecting portion is coupled to the fourth fixing portion by the locking means, the first arm is rotated to the front frame side by a second predetermined angle, and the rear wheel frame is rotated to the front wheel side to Fix to the outer pipe part of the first arm at three positions, and further adjust the saddle and handle height to a lower position, turn these directions toward the rear wheel , and fix the pedals downward on both the left and right sides. A three-wheeled bicycle that can be used as a single wheelchair. The locking means formed on the second connection portion includes an engagement pin that engages with an engagement hole formed in the outer tube portion of the first arm, an elastic member that acts to fit the engagement pin into the engagement hole, The three-wheeled bicycle according to any one of claims 1 to 3 , further comprising an operation member that operates so as to disengage the coupling pin from the engagement hole.

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