JP2012224186A - Bicycle for safe ride - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-wheel or four-wheel bicycle for safe ride that has a simple structure with few hinges and is easy-to-fold and easy-to-carry after being folded.SOLUTION: A frame 2 includes a horizontal part 21 and a slope 22. On the frame 2, a saddle post 5 is erected at the rear end of the horizontal part 21. The saddle post 5 is erected on the frame 2 so as to be bent toward rear wheels 41R, 41L. On the frame 2, a handle post 6 is erected at the front end of the horizontal part 21. The handle post 6 is erected at the front end of the horizontal part 21 so as to be bent toward the rear wheels 41R, 41L. The handle post 6 is bent toward the rear wheels 41R, 41L. The handle post 6 can be bent to overlap the saddle post 5, thereby achieving a compact fold-up bicycle.

Description

  The present invention relates to a safe traveling bicycle, and more particularly to a three-wheeled or four-wheeled safe traveling bicycle that can be folded and easily carried after being folded.

  A folding bicycle that is carried using public transportation and restored to a state where it can be ridden when arriving at a destination is required to be foldable and easy to carry after folding. In particular, a three-wheel or four-wheel folding bicycle having a complicated structure as compared with a two-wheel folding bicycle is difficult to fold and to be easily carried after being folded. (See Patent Document 1 and Patent Document 2)

  In the folding bicycles of Patent Document 1 and Patent Document 2, the frame is divided into a plurality of partial frames and connected by a hinge portion, and a saddle post supporting a saddle shaft and a handle post having a front wheel are connected to the partial frame by a hinge portion. It has a structure. At the time of folding, the partial frame is bent into a mountain shape at the hinge portion around a rotation axis that is perpendicular to the direction of travel of the bicycle and parallel to the ground, and the front and rear wheels are brought close to each other.

  Further, the saddle post and the handle post are folded at the hinge portion around a rotation axis perpendicular to the traveling direction of the bicycle and parallel to the ground, and the saddle post and the handle post are brought close to the partial frame folded in a mountain shape. Thereby, the size at the time of folding is small, and it can stand on its own at the time of folding and can roll while grounding the wheel, so that it is easy to carry.

  However, the folding bicycles of Patent Document 1 and Patent Document 2 have a complicated structure due to an increase in the number of hinge portions, resulting in an increase in manufacturing cost. In order to ensure a predetermined strength, the hinge portion, the partial frame, and the saddle post It was necessary to increase the moment of inertia of the handle post cross section, and it was difficult to reduce the weight.

JP 2004-106780 A JP 2010-1000016 A

An object of the present invention is to provide a three-wheeled or four-wheeled safe traveling bicycle that has a small number of hinge portions, has a simple structure, and is easy to carry after folding and folding.
Another object of the present invention is to provide a three-wheeled or four-wheeled safe traveling bicycle that can be ridden with a sense like an office chair with wheels.

The said subject is solved by the following means. That is, the safe traveling bicycle of the first invention is
One frame extending parallel to the direction of travel of the bicycle;
A front wheel and a rear wheel pivotally supported on the frame so that one or two of the front and rear ends in the traveling direction of the bicycle and a total of three or four can be rotated;
Between the front end and the rear end of the frame, a saddle post that is erected on the rear wheel side while being inclined from the vertical or vertical direction, and a saddle is attached to the upper end thereof;
A handle post erected at the front end of the frame and having a handle attached to the upper end;
A safe traveling bicycle comprising: a transmission mechanism capable of transmitting rotation of the handle to a steering mechanism for steering the front wheel when the handle post is erected on the frame;
The frame is a hollow pipe-like object, and a rotation drive mechanism in the hollow pipe, a rear wheel rotation drive mechanism pivotally attached to the rear wheel, and rotation of the rotation drive mechanism to the rear wheel rotation drive mechanism Built-in rotation transmission mechanism to transmit,
And a petal that is coupled to a crankshaft for driving the gear mechanism and that rotationally drives the bicycle for safe traveling via a crank.

The bicycle for safe driving of the second invention is
One frame extending parallel to the direction of travel of the bicycle;
A front wheel and a rear wheel pivotally supported on the frame so that one or two of the front and rear ends in the traveling direction of the bicycle and a total of three or four can be rotated;
Between the front end and the rear end of the frame, a saddle post that is erected on the rear wheel side while being inclined from the vertical or vertical direction, and a saddle is attached to the upper end thereof;
A handle post that is erected on the front end of the frame so as to be foldable on the rear wheel side, can be folded over the saddle post that is bent on the rear wheel side, and a handle is attached to the upper end thereof;
A transmission mechanism capable of transmitting rotation of the handle to a steering mechanism for steering the front wheel when the handle post is erected on the frame;
The saddle post and the handle post are locked to the rear wheel side so that they cannot be folded when riding, and a lock mechanism that can be unlocked when folded is provided.

The safe traveling bicycle of the third invention is the safe traveling bicycle of the second invention,
The frame is a hollow pipe-like object, and a rotation drive mechanism in the hollow pipe, a rear wheel rotation drive mechanism pivotally attached to the rear wheel, and rotation of the rotation drive mechanism to the rear wheel rotation drive mechanism It has a built-in rotation transmission mechanism for transmission, is connected to a crankshaft for driving the gear mechanism, and has a petal for rotating the safe traveling bicycle via a crank.

  A bicycle for safe traveling according to a fourth aspect of the invention is the bicycle for safe traveling according to the second or third aspect of the invention, wherein the saddle post is erected so as to be bent on the rear wheel side, and the transmission mechanism is When the handle post is erected on the frame, the rotation of the handle is transmitted to the steering mechanism, and the handle post is connected to the steering mechanism so as to be bent toward the rear wheel.

  A safe traveling bicycle according to a fifth aspect of the present invention is the safe traveling bicycle according to the second or third aspect of the present invention, wherein the frame is on the upper surface of the frame and closer to the rear wheel than the standing position of the saddle post. An inclined portion that descends toward the rear wheel side is formed.

  A safe traveling bicycle according to a sixth aspect of the present invention is the safe traveling bicycle according to the second or third aspect, wherein the bicycle is formed at a front end of the frame, and the handle post and the saddle post are bent toward the rear wheel. And a standing stand for grounding to the ground together with the front wheel so that the bicycle for safe traveling is self-supporting when the frame is turned upside down with the front end of the frame down.

  A bicycle for safe driving according to a seventh aspect is the bicycle for safe driving according to the second or third aspect, wherein the frame is formed with a hollow cross section in a direction perpendicular to the traveling direction of the bicycle to increase the rotation of the pedal. A speed increasing mechanism for transmitting to the rear wheel at high speed is incorporated in the hollow.

According to an eighth aspect of the present invention, there is provided a bicycle for safe traveling according to the second or third aspect of the present invention, wherein the rear wheel is mounted on a pair of rollers rotatably supported by a roller base placed on a floor surface. The bicycle can be used as a bicycle-type training machine on which the roller for rotation is driven by rotation of the rear wheel without the bicycle for safe traveling traveling.
A bicycle for safe traveling according to a ninth aspect is the bicycle for safe traveling according to the seventh aspect, wherein the speed increasing mechanism incorporates a speed change mechanism constituted by a planetary gear mechanism, and a shift provided on the handle. The speed is changed by a derailleur wire operated by a lever.

  The safe traveling bicycle of the present invention can be easily reduced in manufacturing cost because the safe traveling bicycle of the present invention has only two hinge portions for folding and has a simple structure. Further, since the structure is simple, it is possible to reduce the weight while ensuring a predetermined strength of the main member. In addition, the bicycle for safe driving according to the present invention is suitable for use by elderly people and physically weak people because it is self-supporting even when it is stopped or running at a low speed and is not easily toppled.

FIG. 1 is an overall perspective view showing a safe traveling bicycle according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a state where the safe traveling bicycle of FIG. 1 is folded. FIG. 3 is a perspective view in which the rear wheel side of the folded safe traveling bicycle of FIG. 2 is lifted and turned upside down, and the front wheel is grounded so that the safe traveling bicycle can be easily carried. FIG. 4 is a perspective view showing the frame of the bicycle for safe driving shown in FIG. FIG. 5 is a perspective view, partly in section, showing the steering mechanism for the front wheels of the safe traveling bicycle of FIG. 6 is a partial cross-sectional perspective view showing a gear mechanism that transmits the rotation of the crankshaft of the bicycle for safe traveling shown in FIG. 7 shows the hinge part of the saddle post of the bicycle for safe driving in FIG. 1, FIG. 7 (a) is a perspective view showing a state in which the saddle post is erected on the frame, and FIG. It is a perspective view which shows the state bent with respect to. FIG. 8 is a longitudinal sectional view of the hinge portion of the saddle post in the state of FIG. FIG. 9 is a longitudinal sectional view of the hinge portion showing a state where the handle post is erected on the frame. FIG. 10 is a perspective view showing a second embodiment of the present invention, and is a partial cross-sectional view showing a toothed belt mechanism that transmits rotation of a crankshaft of a bicycle for safe traveling to a rear wheel at an increased speed. FIG. 11 is a perspective view showing a planetary gear type speed change mechanism incorporated in the toothed pulley of FIG. FIG. 12 is a perspective view showing a third embodiment of the present invention and showing a state where the safe traveling bicycle of the present invention is used as a bicycle type training machine.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. FIG. 1 is an overall perspective view showing a safe traveling bicycle according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing a state where the safe traveling bicycle of FIG. 1 is folded. FIG. 3 is a perspective view in which the rear wheel side of the safe traveling bicycle of FIG. 2 is lifted and inverted, the front wheel is grounded, and the safe traveling bicycle is easily carried. 4 is a perspective view showing a frame of the bicycle for safe driving in FIG. 1, and FIG. 5 is a perspective view showing a part of a steering mechanism for a front wheel of the bicycle for safe driving in FIG.

  FIG. 6 is a partial cross-sectional perspective view showing a gear mechanism that transmits the rotation of the crankshaft of the bicycle for safe driving shown in FIG. 7 shows the hinge portion of the saddle post of the bicycle for safe driving in FIG. 1, FIG. 7 (a) is a perspective view showing a state where the saddle post is erected on the frame, and FIG. 7 (b) is the saddle post on the frame. It is a perspective view which shows the state bent with respect to it. FIG. 8 is a longitudinal sectional view of the hinge portion of the saddle post in the state of FIG. 7A, and FIG. 9 is a longitudinal sectional view of the hinge portion showing a state where the handle post is erected on the frame.

  As shown in FIG. 1, a bicycle 1 for safe traveling according to a first embodiment of the present invention is roughly supported by one frame 2 and a frame 2 rotatably supported at the front end in the traveling direction of the bicycle. The front wheels 31R, 31L, the frame 2 are formed by rear wheels 41R, 41L rotatably supported at the rear end of the bicycle in the traveling direction, a saddle post 5 standing on the frame 2, and a handle post 6. As shown in FIGS. 1 and 4, the frame 2 extends in parallel to the traveling direction of the bicycle (arrow A in FIGS. 1, 2, 4, and 5), and has a cross section perpendicular to the traveling direction of the bicycle. It is formed in a hollow rectangular shape.

  The frame 2 is formed with a horizontal portion 21 and an inclined portion 22. The horizontal portion 21 is formed at an angular position so as to be parallel to the ground from the front end to the rear end in the traveling direction of the bicycle when the bicycle is used, and is formed to have a length of about 1/3 of the total length of the frame 2. ing. The inclined portion 22 is formed in a shape that becomes an angular position that gradually descends from the rear end of the horizontal portion 21 toward the rear wheels 41R and 41L when the bicycle is used. A rear wheel support portion 23 is formed at the rear end of the inclined portion 22. The center axis of the rear wheel support portion 23 is arranged in a direction orthogonal to the center axis of the frame 2, that is, formed so as to be perpendicular to the traveling direction of the bicycle and parallel to the ground when the bicycle is used. Has been. A front wheel support portion 25 is formed at the lower end of the vertical portion 24 formed vertically from the lower surface of the front end of the horizontal portion 21 toward the ground.

  The center axis of the front wheel support portion 25 is arranged in a direction orthogonal to the center axis of the frame 2, that is, when the bicycle is used, it is formed so as to be perpendicular to the traveling direction of the bicycle and parallel to the ground. ing. Rear wheels 41R and 41L are pivotally supported by the rear wheel support portion 23 at both left and right ends when viewed from the traveling direction of the bicycle. Further, front wheels 31R and 31L are rotatably supported by the front wheel support portion 25 at both left and right ends when viewed from the traveling direction of the bicycle. In the first embodiment of the present invention, the outer diameters of the front wheels 31R and 31L and the rear wheels 41R and 41L are set to be the same.

  In the frame 2, the lower end of the saddle post 5 is slidably erected at the rear end of the horizontal portion 21. The position of the lower end of the saddle post 5 is approximately 1/3 of the total length of the front and rear positions of the frame 2. The saddle post 5 is formed in a rectangular shape having a hollow cross section in a direction orthogonal to the longitudinal direction. A saddle shaft 52 having a saddle 51 attached to the upper end thereof is nested in a hollow portion at the upper end of the saddle post 5 so that the height of the saddle 51 can be adjusted. After adjusting the height of the saddle 51 according to the height of the rider, the saddle shaft 52 is clamped to the saddle post 5 by operating a quick release cam lever (not shown).

  The saddle post 5 is erected on the frame 2 so as to be bent toward the rear wheels 41R and 41L. That is, as shown in detail in FIGS. 7 and 8, a hinge bracket 57 is fixed to the horizontal portion 21 with a bolt 58, and a rotating shaft 53 that is perpendicular to the traveling direction of the bicycle and parallel to the ground is attached to the hinge bracket 57. It has been. The lower end of the saddle post 5 is pivotally supported by the hinge bracket 57 so as to be bent (swingable) about the rotation shaft 53. An inclined surface 571 is formed on the upper surface of the hinge bracket 57. The inclined surface 571 is formed in a shape that descends from the front wheels 31R, 31L side toward the rear wheels 41R, 41L.

  Therefore, when the saddle post 5 is erected on the hinge bracket 57, the lower surface 5A of the saddle post 5 comes into contact with the inclined surface 571, and the saddle post 5 is erected slightly inclined toward the rear wheels 41R and 41L. That is, when the bicycle is used, the center axis of the saddle post 5 is inclined from the vertical to an acute angle. The saddle post 5 acts as a spring that absorbs an impact from the ground because it is easy to bend because it stands up slightly and is supported by a cantilever. A rotating shaft 55 perpendicular to the traveling direction of the bicycle and parallel to the ground is fixed to the lower end of the saddle post 5, and an engaging claw 56 is pivotally supported around the rotating shaft 55.

  As shown in FIG. 7A, when the saddle post 5 is erected on the horizontal portion 21, the engaging claw 56 engages with the notch groove 54 formed in the hinge bracket 57. The engagement claw 56 is always urged by a spring (compression spring) 59 in a direction to engage with the notch groove 54. The engaging claw 56 and the notch groove 54 constitute a lock mechanism that locks the saddle post 5 to the rear wheels 41R and 41L so that the saddle post 5 cannot be folded and can be unlocked when folded. Accordingly, when the saddle post 5 is erected on the horizontal portion 21 and the engaging claw 56 is engaged with the notch groove 54, the saddle post 5 is locked to the rear wheels 41R and 41L so that it cannot be bent, that is, the saddle post 5 and the saddle post. 5 is fixed.

  When the saddle post 5 is bent toward the rear wheels 41R and 41L, the engagement pawl 56 is released from the notch groove 54 against the urging force of the spring 59 to release the lock, and then the saddle post 5 is released from the rear wheel 41R. , Bend to the 41L side. In this embodiment, the saddle post 5 can be bent toward the rear wheels 41R and 41L, but the saddle post 5 is made of engineering resin or fiber reinforced resin such as CFRP or FRP for weight reduction. When the bending mechanism is used, the strength is weakened. In this case, the saddle post 5 is preferably fixed to the rear wheels 41R and 41L while being inclined from the vertical or vertical direction. In this case, there is a problem if it becomes large when folded, so that it is possible to accommodate the pipe material with different diameters in multiple stages so that the saddle post 5 can be expanded and contracted. is there.

  As shown in FIGS. 1, 2, and 9, a handle post 6 is erected on the front end of the horizontal portion 21 in the frame 2. A handle 61 is fixed to the upper end of the handle post 6. Although not shown, like the saddle post 5, the upper portion of the handle post 6 is formed in a hollow cylindrical shape, and the handle shaft to which the handle 61 is attached is fitted into the handle post 6 in a telescoping manner. The height may be adjustable according to height.

  The handle post 6 is provided at the front end of the horizontal portion 21 so as to be rotatable about a vertical axis and bendable to the rear wheels 41R and 41L. That is, the outer periphery of the hollow cylindrical steering shaft 74 is pivotally supported on the horizontal portion 21 by the bearing 66 so as to be swingable about a vertical axis. A cylindrical portion 651 formed on the lower side of the hinge bracket 65 is screwed into the inner peripheral surface 741 of the hollow cylindrical portion of the steering shaft 74, and the cylindrical portion 651 swings integrally with the steering shaft 74.

  The hinge bracket 65 is provided with a rotating shaft 67 that is perpendicular to the traveling direction of the bicycle and parallel to the ground. The lower end of the handle post 6 is pivotally supported by the hinge bracket 65 so that it can be bent around the rotation shaft 67. A horizontal surface 652 is formed on the upper surface of the hinge bracket 65. Therefore, when the handle post 6 is erected on the hinge bracket 65, the lower surface 6A of the handle post 6 comes into contact with the horizontal surface 652, and the handle post 6 is erected vertically. A rotation shaft 68 that is perpendicular to the traveling direction of the bicycle and parallel to the ground is fixed to the lower end of the handle post 6, and an engaging claw 69 is pivotally supported around the rotation shaft 68.

  As shown in FIG. 9, when the handle post 6 is erected on the horizontal portion 21, the engaging claw 69 is engaged with the notch groove 653 formed in the hinge bracket 65. The engaging claw 69 is always urged in a direction to engage with the notch groove 653 by a spring (compression spring) 654. The engagement claw 69 and the notch groove 653 constitute a lock mechanism that locks the handle post 6 to the rear wheels 41R and 41L so that the handle post 6 cannot be folded and can be unlocked when folded.

  Accordingly, when the handle post 6 is erected on the horizontal portion 21 and the engagement claw 69 is engaged with the notch groove 653, the handle post 6 is locked to the rear wheels 41R and 41L so that it cannot be bent, and the rotation of the handle post 6 is prevented. Then, it is transmitted to the steering shaft 74 through the hinge bracket 65 and operates the steering mechanism 7 shown in FIG. That is, the rotation shaft 67, the hinge bracket 65, the bearing 66, and the steering shaft 74 can transmit the rotation of the handle 61 to the steering mechanism 7 that steers the front wheels 31R and 31L when the handle post 6 is erected on the frame 2. The mechanism is configured.

  When the handle post 6 is bent toward the rear wheels 41R and 41L, the engagement claw 69 is released from the notch groove 653 against the urging force of the spring 654 to release the lock, and then the handle post 6 is released from the rear wheel 41R. , Bend to the 41L side. As shown in FIG. 9, a standing stand 29 is fixed to the front end of the horizontal portion 21 with a bolt 291, and when the frame 2 is inverted with the front end of the horizontal portion 21 facing down, the standing stand 29 contacts the ground. In addition, the bicycle 1 for safe traveling can be stably made independent by being grounded to the ground together with the front wheels 31R and 31L at three points.

  Although not shown, if the horizontal portion 21 of the frame 2 is a hollow telescopic type and the length of the frame 2 in the traveling direction of the frame 2 can be adjusted, as in the case of the saddle post 5, The overall length can be shortened.

  The steering mechanism 7 for the front wheels 31R and 31L shown in FIG. 5 employs an Ackerman-Jantho mechanism. That is, as the handle 61 rotates, the tie rods 71R and 71L move in a direction parallel to the ground and perpendicular to the traveling direction of the bicycle via the handle post 6, the hinge bracket 65, the steering shaft 74, and the levers 73R and 73L. Then, since the opening angle is given to the left and right knuckle arms 72R and 72L, the movement of the knuckle arms 72R and 72L is different, and the steering angle of the front wheels 31R and 31L inside the corner is the front wheel 31R and the outside of the corner. The steering angle is larger than 31L, and the front wheels 31R and 31L can turn without slipping.

  As shown in FIGS. 1 and 6, a gear mechanism (speed increasing mechanism) 81 that accelerates and transmits the rotation of the left and right pedals 26 </ b> R and 26 </ b> L and the left and right cranks 27 </ b> R and 27 </ b> L to the rear wheels is a rectangular shape of the frame 2. It is built in the hollow part. That is, the left and right cranks 27 </ b> R and 27 </ b> L are connected to the crankshaft 28 that is rotatably supported by the frame 2. A spur gear 811 is fixed to the crankshaft 28, and the spur gear 811 rotates through a spur gear 812, a spur gear 813, a spur gear 814, a bevel gear 815, a bevel gear 816, a bevel gear 817, and a bevel gear 818. The speed is increased and transmitted to the axles (hub shafts) 42 of the rear wheels 41R and 41L, and the rear wheels 41R and 41L rotate. The bevel gear 816 and the bevel gear 817 are fixed to both ends of the transmission shaft 819, respectively. Therefore, the left and right cranks 27R and 27L, the crankshaft 28, and the gear 811 constitute a gear crank in a general bicycle.

  In the gear mechanism 81 according to the first embodiment of the present invention, the gear ratio is set so that the rear wheels 41R and 41L rotate 10 times by one rotation of the pedals 26R and 26L. The front wheels 31R, 31L and the rear wheels 41R, 41L according to the first embodiment of the present invention have a small outer diameter of 150 mm and a low center of gravity of the safe traveling bicycle 1, so that the traveling stability is good. Further, the gear mechanism 81 according to the first embodiment of the present invention is built in the hollow portion of the frame 2 and has no exposed portion, and thus has high safety.

  Moreover, the safe traveling bicycle 1 according to the first embodiment of the present invention has only two hinge portions for folding, and the structure is simple, so that it is easy to reduce the manufacturing cost. Further, since the structure is simple, it is possible to reduce the weight while ensuring a predetermined strength of the main member. Further, the safe traveling bicycle 1 according to the first embodiment of the present invention has a small ground contact area at the time of traveling of 380 mm × 650 mm, an outer diameter of the wheel of 150 mm, and a low center of gravity. You can ride safely as if you were sitting in an office chair with casters. Therefore, it is suitable for installation as a bicycle for visitors in large facilities such as large hospitals, large supermarkets, exhibition halls, and airfields. In addition, it is self-supporting even when stopped or running at a low speed, and it is difficult to fall down, so it is suitable for use by elderly people and physically weak people. For this reason, it is possible to get on with a sense like an office chair with wheels.

  A bicycle such as a road bike that is normally used has a wheel outer diameter of about 650 mm, and the gear ratio of the front and rear sprocket wheels is set so that the rear wheel rotates about 2.5 by one rotation of the pedal. If you turn the pedal one turn, you run about 5.1m. In the first embodiment of the present invention, when the pedals 26R and 26L are turned one turn, the rear wheels 41R and 41L rotate 10 times and travel about 4.7 m, so that they have a traveling performance equivalent to that of a normally used bicycle. is doing.

  Next, the speed increasing mechanism of the second embodiment will be described. FIG. 10 shows a second embodiment of the present invention, in which a part of a toothed belt mechanism (speed increasing mechanism) 82 that transmits the rotation of the crankshaft of a bicycle for safe driving to the rear wheels at an increased speed is shown in cross section. It is a perspective view. The second embodiment is an example in which the gear of the first embodiment is changed to a toothed pulley and a toothed belt. In the following description, only structural parts different from those of the first embodiment will be described, and overlapping descriptions will be omitted. Further, the same parts will be described with the same numbers.

  As shown in FIG. 10, the toothed belt mechanism (speed increasing mechanism) 82 that accelerates the rotation of the left and right pedals 26 </ b> R and 26 </ b> L and the left and right cranks 27 </ b> R and 27 </ b> L and transmits the rotation to the rear wheels has the rectangular shape of the frame 2. Built in the hollow part. That is, the left and right cranks 27 </ b> R and 27 </ b> L are connected to the crankshaft 28 that is rotatably supported by the frame 2. A toothed pulley 821 is fixed to the crankshaft 28, and the rotation of the toothed pulley 821 is caused by a toothed belt 822, a toothed pulley (not shown), a toothed pulley 823, a toothed belt 824, a toothed pulley 825, a toothed The speed is increased through the pulley 826, the toothed belt 827, and the toothed pulley 828, and is transmitted to the axle 42 of the rear wheels 41R and 41L, so that the rear wheels 41R and 41L rotate. Accordingly, the crankshaft 28, the toothed pulley 821, and the left and right cranks 27R and 27L constitute a gear crank as used in a general bicycle.

  Similarly to the gear mechanism 81 of the first embodiment, the toothed belt mechanism 82 of the second embodiment of the present invention is configured so that the rear wheels 41R and 41L rotate 10 times by one rotation of the pedals 26R and 26L. Tooth ratio is set. In the second embodiment of the present invention, similarly to the gear mechanism 81 of the first embodiment, when the pedals 26R and 26L are swung once, the rear wheels 41R and 41L rotate 10 times and travel about 4.7 m. Therefore, it has a running performance equivalent to a normally used bicycle.

  FIG. 11 is a perspective view showing a planetary gear type transmission mechanism 83 incorporated in the toothed pulley 821 of FIG. 11 includes an internal gear 831, a sun gear 832, three first planetary gears 833, three second planetary gears 834, and a planet carrier 835. The internal gear 831 is formed integrally with the toothed pulley 821. The planetary gear type speed change mechanism 83 constitutes a gear crank in a general bicycle together with the cranks 27R and 27L.

  The sun gear 832 is externally fitted to the outer periphery of the crankshaft 28 via a one-way clutch (not shown). When the one-way clutch is engaged, the sun gear 832 rotates integrally with the crankshaft 28, and when the one-way clutch is disengaged, the sun gear 832 is separated from the rotation of the crankshaft 28. A dual control lever 62 is attached to the handle 61 of FIG. 1, and the brake operation and the shift operation can be selectively performed by changing the operation direction of the dual control lever 62.

  That is, the dual control lever 62 has both a brake lever function and a shift lever function. When the shift operation of the dual control lever 62 is performed, the one-way clutch can be engaged and disengaged via the derailleur wire 63, the lever 64A, the lever 64B, and the lever 64C shown in FIGS.

  The three first planetary gears 833 are respectively meshed with the sun gear 832, and the three second planetary gears 834 are meshed with the first planetary gear 833 and the internal gear 831 at the same time. The disk-shaped planet carrier 835 is fixed to the crankshaft 28, rotates integrally with the crankshaft 28, holds the rotation shafts of the three first planetary gears 833 and the three second planetary gears 834, and The three first planetary gears 833 and the three second planetary gears 834 are revolved.

  Accordingly, the shift operation of the dual control lever 62 is performed, and the one-way clutch is engaged and disengaged through the derailleur wire 63, the lever 64A, the lever 64B, and the lever 64C, so that the shift operation by the planetary gear type transmission mechanism 83 is performed. The pedal can be easily depressed on some slopes. The planetary gear type transmission mechanism 83 of FIG. 11 may be incorporated in the spur gear 811 of the gear mechanism 81 of FIG.

  After reaching the destination on the bicycle 1 for safe driving, the saddle post 5 is unlocked by releasing the engaging claw 56 from the notch groove 54 against the biasing force of the spring as shown in FIG. The saddle post 5 is bent toward the rear wheels 41R and 41L. Since the inclined portion 22 is formed in the frame 2, the saddle post 5 can be folded deeply by approaching the rear wheels 41R and 41L, and thus can be folded compactly.

  Next, the engaging claw is released from the notch groove against the urging force of the spring to release the lock of the handle post 6, and then the handle post 6 is bent toward the rear wheels 41R and 41L. Since the handle post 6 can be folded over the saddle post 5, it can be folded compactly.

  After the folding, as shown in FIG. 3, when the frame 2 is turned upside down with the front end of the frame 2 down, the standing stand 29 fixed to the front end of the frame 2 comes into contact with the ground, and with the front wheels 31R and 31L, The ground can be grounded at three points, and the safe traveling bicycle 1 can be made stable and independent. The length (L) × width (B) × height (H) of the bicycle 1 for safe traveling folded and inverted is 380 mm × 290 mm × 800 mm. It is suitable for carrying by public transportation such as trains and buses because the floor area is 380mm x 290mm. While holding the handle 61 by hand and rolling the front wheels 31R and 31L to the ground, the folded safe traveling bicycle 1 can be easily brought into public transportation or buildings.

  In the safe traveling bicycle 1 of the first embodiment of the present invention, main members such as the frame 2, the saddle post 5, the handle post 6, the gear mechanism 81, the toothed pulleys 821, 823, 825, 826, and 828 are provided. It is made of an iron-based material such as S45C or SS40. If this main member is made of a light alloy such as a titanium alloy, an aluminum alloy, or a magnesium alloy, the weight can be reduced, so that it is suitable for the elderly and physically weak people to carry in a folded state. A light alloy material is preferable because the manufacturing cost can be reduced by drilling or screwing in the state of a plate, measuring by laser processing, and then bending by press processing.

  Further, if the main member is molded from engineering plastic mixed with glass fiber or carbon fiber, the weight can be further reduced. The elasticity unique to engineering plastics containing 10-50% glass fiber and carbon fiber acts as a spring that absorbs shocks from the ground, reducing the impact of hard rubber wheels, enabling smooth running To do.

  Next, a safe traveling bicycle according to a third embodiment will be described. FIG. 12 shows a third embodiment of the present invention and is a perspective view showing a state where the safe traveling bicycle 1 of the present invention is used as a bicycle type training machine. In the following description, only structural parts different from the above-described embodiment will be described, and redundant description will be omitted. Further, the same parts will be described with the same numbers.

  As shown in FIG. 12, rollers 431 and 432 are rotatably supported on the upper surface of a rectangular plate-shaped roller base 43 placed on the ground or floor surface at two locations in the front and rear directions in the traveling direction of the bicycle. A resistance adjustment mechanism (brake) 433 that comes into contact with the outer periphery of the roller 432 is attached to the upper surface on the rear side of the roller base 43. The resistance adjustment mechanism 433 is adjusted to give resistance to the rotation of the roller 432, and the pedal 26R. The load of 26L is adjusted to a value that is optimal for the passenger.

  A monitor 434 is attached in the vicinity of the upper end of the handle post 6. If the rear wheels 41R and 41L of the safe traveling bicycle 1 are placed on the rollers 431 and 432, the bicycle type training machine is completed. If you ride on the saddle 51 and push the pedals 26R, 26L, the bicycle 1 for safe driving will remain stopped, and the rollers 431, 432 will rotate with the rotation of the rear wheels 41R, 41L. Time, calories burned, etc. are displayed, which can be used to strengthen the legs, heart, and lungs. In other words, it can be used for daily shopping, etc., and can also be used for physical fitness recovery training after illness treatment, etc., so the application is wide.

  In the embodiment of the present invention, the folding bicycle has been described. However, the handle post 6 and the saddle post 5 may be fixed instead of the folding structure instead of the folding structure. This fixing structure fixes the base of the handle post 6 and the saddle post 5 integrally with the frame 2 by pipe joint or welding. Further, in the embodiment of the present invention, an example in which the front wheel and the rear wheel are applied to a four-wheel bicycle is described. However, either the front wheel or the rear wheel is two wheels, and either the front wheel or the rear wheel is used. The other may be applied to a one-wheeled three-wheeled bicycle.

DESCRIPTION OF SYMBOLS 1 ... Bicycle for safe driving 2 ... Frame 21 ... Horizontal part 22 ... Inclined part 23 ... Rear wheel support part 24 ... Vertical part 25 ... Front wheel support part 26R, 26L ... Pedal 27R, 27L ... Crank 28 ... Crankshaft 29 ... Standing Stand 291 ... Bolt 31R, 31L ... Front wheel 41R, 41L ... Rear wheel 42 ... Axle 43 ... Roller base 431, 432 ... Roller 433 ... Resistance adjustment mechanism (brake)
434 ... Monitor 5 ... Saddle post 5A ... Lower surface 51 ... Saddle 52 ... Saddle shaft 53 ... Rotating shaft 54 ... Notch groove 55 ... Rotating shaft 56 ... Engaging claw 57 ... Hinge bracket 571 ... Inclined surface 58 ... Bolt 59 ... Spring 6 ... Handle post 6A ... Lower surface 61 ... Handle 62 ... Dual control lever 63 ... Derailleur wire 64A, 64B, 64C ... Lever 65 ... Hinge bracket 651 ... Cylindrical part 652 ... Horizontal plane 653 ... Notch groove 654 ... Spring 66 ... Bearing 67 ... Rotating shaft 68 Rotating shaft 69 Engaging claw 7 Steering mechanism 71R, 71L Tie rod 72R, 72L Knuckle arm 73R, 73L Lever 74 Steering shaft 741 Inner peripheral surface 81 Gear mechanism (speed increasing mechanism)
811, 812, 813, 814 ... Spur gears 815, 816, 817, 818 ... Bevel gears 819 ... Transmission shaft 82 ... Toothed belt mechanism (speed increasing mechanism)
821, 823, 825, 826, 828 ... Toothed pulley 822, 824, 827 ... Toothed belt 83 ... Planetary gear-type transmission mechanism 831 ... Internal gear 832 ... Sun gear 833 ... First planetary gear 834 ... Second planetary gear 835 ... Planetary carrier

Claims (9)

One frame extending parallel to the direction of travel of the bicycle;
A front wheel and a rear wheel pivotally supported on the frame so that one or two of the front and rear ends in the traveling direction of the bicycle and a total of three or four can be rotated;
Between the front end and the rear end of the frame, a saddle post that is erected on the rear wheel side while being inclined from the vertical or vertical direction, and a saddle is attached to the upper end thereof;
A handle post erected at the front end of the frame and having a handle attached to the upper end;
A safe traveling bicycle comprising: a transmission mechanism capable of transmitting rotation of the handle to a steering mechanism for steering the front wheel when the handle post is erected on the frame;
The frame is a hollow pipe-like object, and a rotation drive mechanism in the hollow pipe, a rear wheel rotation drive mechanism pivotally attached to the rear wheel, and rotation of the rotation drive mechanism to the rear wheel rotation drive mechanism Built-in rotation transmission mechanism to transmit,
A safe traveling bicycle, comprising: a petal coupled to a crankshaft for driving the gear mechanism and for rotationally driving the safe traveling bicycle via a crank. One frame extending parallel to the direction of travel of the bicycle;
A front wheel and a rear wheel pivotally supported on the frame so that one or two of the front and rear ends in the traveling direction of the bicycle and a total of three or four can be rotated;
Between the front end and the rear end of the frame, a saddle post that is erected on the rear wheel side while being inclined from the vertical or vertical direction, and a saddle is attached to the upper end thereof;
A handle post that is erected on the front end of the frame so as to be foldable on the rear wheel side, can be folded over the saddle post that is bent on the rear wheel side, and a handle is attached to the upper end thereof;
A transmission mechanism capable of transmitting rotation of the handle to a steering mechanism for steering the front wheel when the handle post is erected on the frame;
A bicycle for safe driving, comprising: a lock mechanism that locks the saddle post and the handle post to the rear wheel side so that they cannot be folded when riding, and that can be unlocked when folded. The bicycle for safe driving according to claim 2,
The frame is a hollow pipe-like object, and a rotation drive mechanism in the hollow pipe, a rear wheel rotation drive mechanism pivotally attached to the rear wheel, and rotation of the rotation drive mechanism to the rear wheel rotation drive mechanism Built-in rotation transmission mechanism to transmit,
A safe traveling bicycle, comprising: a petal coupled to a crankshaft for driving the gear mechanism and for rotationally driving the safe traveling bicycle via a crank. In the safe traveling bicycle according to claim 2 or 3,
The saddle post is erected so that it can be bent on the rear wheel side,
The transmission mechanism transmits the rotation of the handle to the steering mechanism when the handle post is erected on the frame, and is coupled to the steering mechanism so that the handle post can be bent toward the rear wheel. Bicycle for safe driving characterized by this. In the safe traveling bicycle according to claim 2 or 3,
The bicycle for safe traveling, wherein the frame is formed with an inclined portion that descends toward the rear wheel on the upper surface of the frame, closer to the rear wheel than the standing position of the saddle post. In the safe traveling bicycle according to claim 2 or 3,
Formed at the front end of the frame, after folding the handle post and the saddle post to the rear wheel side, when the frame is turned upside down with the front end of the frame down, the safety wheel is grounded together with the front wheel to the ground. A safe traveling bicycle comprising a standing stand for allowing the traveling bicycle to stand on its own. In the safe traveling bicycle according to claim 2 or 3,
The frame has a hollow cross section in a direction perpendicular to the traveling direction of the bicycle,
A bicycle for safe driving characterized in that a speed increasing mechanism for increasing the speed of rotation of the pedal and transmitting it to the rear wheel is incorporated in the hollow. In the safe traveling bicycle according to claim 2 or 3,
A bicycle type in which the rear wheel is placed on a pair of rollers rotatably supported on a roller base placed on the floor surface, and the roller is driven to rotate by rotation of the rear wheel without the safe traveling bicycle running. Bicycle for safe driving, characterized in that it can be used as a training machine. In the bicycle for safe driving according to claim 7,
The speed increasing mechanism incorporates a speed change mechanism including a planetary gear mechanism, and shifts by a derailleur wire operated by a shift lever provided on the handle.

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