JPH0853091A - Collapsible tricycle - Google Patents

Abstract

PURPOSE:To narrow a parking place by spreading the interval between the left and right rear wheels in the riding on a vehicle, permitting the stable traveling and reducing the interval between the rear wheels while parking. CONSTITUTION:A handleber 5 and a head pipe 6 having a front wheel 3 are installed on a main pipe 2, and a stepping pedal 15 is axially supported at the center, and the left and right stays 8 and 8 are axially supported on a stay supporting part at the rear end, and the erection pipe 10 of a saddle 9 is installed at a stay supporting part, and an erection pipe holding frame 26 is installed at the stay supporting part, and a rear wheel 4 is installed at the stay rear end. The driving force is transmitted by a flexible shaft 18 through a bevel gear to the axle 16 of the rear wheel from the stepping pedal 5, and a fixed plate installed at the stay rear end and a bracket are installed, and the rods 19 and 19 which are axially supported on the left and right brackets are axially supported on the rod holding frame, in a forwardly turnable manner, and the erection pipe upper part and the rod holding frame are connected by a connecting rod 13, and the forward tilt of the erection pipe 10 and the forward turn of the rod 19 are interlocked, and the interval between the left and right rear wheels 4 and 4 of a collapsible tricycle is reduced together with the left and right stays 8 and 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding bicycle, and more particularly to a three-wheel bicycle having one front wheel and two left and right rear wheels which are folded by interlocking a stand pipe and a rear frame.

[0002]

2. Description of the Related Art Bicycles are widely used as a convenient transportation means for shopping or to a station. Therefore, securing a bicycle storage place in front of a station or in a shopping district is a problem, especially in the front of the station or a shopping district. The problem of using space effectively has been raised, and this is an important issue.

In order to solve such a problem, many proposals have been made for a bicycle parking means, particularly for a two-wheeled bicycle, the width, the length of which is reduced by folding a frame, a handle, a pedal or the like. In addition, a tricycle in which the saddle part and the handle part are folded is proposed, as disclosed in Japanese Utility Model Publication No. 49-27956. However, there is no proposal of a three-wheeled bicycle including one front wheel having a mechanism for folding the frame part and two left and right rear wheels. The three-wheeled bicycle was about twice as wide as the two-wheeled bicycle in the bicycle storage space, and it was against the actual demand. This is because the width of the two left and right rear wheels of the conventional three-wheeled bicycle is wide.

Therefore, Japanese Utility Model Publication No. 57-7575 proposes a three-wheeled bicycle in which the width of the left and right rear wheels is narrowed. However, this prior art has a disadvantage that the rear wheel is always narrow and the balance is poor when riding.

[0005]

SUMMARY OF THE INVENTION The present invention is a three-wheeled bicycle having one front wheel and two left and right rear wheels. The width of the two left and right rear wheels is wide when riding, and the folding mechanism is simple when parked. It is an object to reduce the distance between the rear wheels that face each other by operating.

[0006]

According to a first aspect of the present invention, a bicycle main frame is composed of a main pipe and left and right stays following the main pipe. A head pipe with a handle and a front wheel is attached to the front end, a foot pedal is pivotally supported at the center of the main pipe, the left and right stays are pivotally supported via a stay support at the rear end of the main pipe, and the saddle is at the upper end. In a three-wheeled bicycle in which the stand support pipes provided in the above are provided in the stay support parts, and the left and right rear wheels are provided at the rear ends of the left and right stays, respectively, a flexible shaft is provided from the drive shaft of the foot pedal to the axle of the left or right rear wheel. The bevel gear is used to engage the drive shaft of the foot pedal with the tip of the flexible shaft. Bevel gears engage the axles of the rear wheels, which are offset, to form a drive force transmission mechanism.Brackets are provided inside the left and right fixed plates at the rear ends of the left and right stays. It is pivotally supported in a butt state and rotatable forward, the inner center of the left and right rods is pivotally supported by a rod holding frame having a back plate of a predetermined lateral width at the rear, and left and right stays and left and right rods form an isosceles triangle. As a rear frame, the stand pipe is pivotally supported on the stay support part so that it can be tilted forward, and the stand pipe holding frame for standing and holding the stand pipe at the rear part is installed upright on the stay support part. A fold-up characterized in that the holding frames are connected by a connecting rod so that the forward tilting of the vertical pipe and the forward rotation of the rod can be interlocked, and the distance between the left and right rear wheels can be narrowed together with the left and right stays. A wheel bicycle.

According to a second aspect of the present invention, the stay supporting portion is provided with an abutting plate having an elastic body that comes into contact with the outer side portions of the left and right stays when the left and right stays are fully expanded during traveling. A folding tricycle according to the means of the invention of claim 1.

According to the third aspect of the present invention, the stand pipe holding frame is a semi-cylindrical stand pipe storage portion, and a notched elongated hole for vertically movably inserting the connecting rod is provided in an upper rear portion of the stand pipe holding frame.
A stopper is provided on the side of the stand pipe storage part, and the stopper is always urged by a spring to the stand pipe side, and the stopper pin is inserted into the pin locking hole on the stand pipe side to stand the stand pipe holding frame. The folding tricycle according to the means of the invention of claim 1 or 2, characterized in that the folding tricycle.

[0009]

Since the folding tricycle of the present invention has the above-described means, when traveling, when the saddle is pulled up by hand, the stand pipe stands upright on the stay support portion and becomes the stand pipe storage portion of the stand pipe holding frame. Fit in. When the standpipe fits into the standpipe storage part, the stopper pin adapts to the movement of the bulge on the wall of the standpipe and is pushed against the spring pressure and retracts, and the standpipe fits into the standpipe storage part. When it fits in, it automatically fits into the pin locking hole of the stand pipe and fixes the stand pipe to the stand pipe holding frame. At the same time, the connecting rod connected to the shaft of the upper end of the stand pipe pushes the rod holding frame connected to the other end backward to straighten the left and right rods. Then, the left and right fixing plates are expanded, and accordingly, the left and right stays and the left and right wheels are also expanded to be in a running posture. At this time, the outer sides of the left and right stays are brought into contact with an elastic body such as a rubber plate provided in an abutment plate attached to the stay support portion to fix the left and right stays.

When the space between the left and right rear wheels is narrowed when the bicycle is parked, pulling the grip portion of the stopper of the stand pipe holding frame causes the stopper pin to withdraw from the pin locking hole of the stand pipe against the pressing spring. The vertical pipe is free from the vertical pipe holding frame, and when the saddle is tilted forward by hand, it is pulled by the connecting rod to move the rod holding frame forward, and at the same time, the distance between the left and right stays and the left and right rear wheels is reduced. To be Finally, the side surfaces of the left and right rods come into contact with the back plate of the rod holding frame, which is set to a predetermined width. In this way, the entire rear frame is brought into a state in which the rear frames are close to each other and can be folded compactly.

Since the driving force transmission mechanism of the folding tricycle according to the present invention is composed of the bevel gear and the flexi shaft, the engagement of the driving mechanism will not be disengaged even if the distance between the left and right stays and the left and right wheels is changed.

Further, as described above, when the vehicle is in a traveling state, an elastic body such as a rubber plate provided on the abutment plate attached to the stay support portion comes into contact with the outside of the left and right stays to elastically fix the left and right stays. It properly absorbs the vibration of the time so that you can drive stably and comfortably.

[0013]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a folding tricycle according to the present invention in a traveling state. FIG. 2 is a front view of the folding tricycle according to the present invention in a traveling state. FIG. 3 is a plan view of the folding tricycle of the present invention in a parked state. FIG. 4 is a front view of the folding tricycle of the present invention in a parked state. FIG. 5 is an enlarged perspective view of the rear portion of the frame of the folding tricycle according to the present invention. FIG. 6 is a partially enlarged cross-sectional view illustrating a fixed state of the stand pipe and the stand pipe holding frame by the stopper in the circle A of FIG.

The folding tricycle 1 is shown in FIGS.
As shown in FIG. 2, a head pipe 6 is provided at the front end of the rising portion of the main pipe 2, and a handle post 7 rotatably provided above the head pipe 6 and a handle 5 tightly connected thereto are provided. The front wheel 3 is pivotally supported by a front wheel fork provided rotatably at the lower portion thereof. of course,
The front wheel mudguard 17, which is not shown, is provided with a front wheel brake, a lamp and the like as conventionally used.

A foot pedal 15 is pivotally supported on the central portion of the lower horizontal portion of the main pipe 2. As shown in FIG. 5, a stay support portion 2 is further provided at the rear end of the horizontal portion of the main pipe 2.
Connect 5. Vertical axis 2 to the left and right of the rear of the stay support 25
9, 29 are provided, and the left and right stays 8, are provided on the vertical axes 29, 29.
8 is supported. Therefore, the left and right stays 8 and 8 are rotatable left and right.

The standing pipe 10 is pivotally supported on a lateral support shaft 28 of the stay support portion 25. Therefore, the vertical pipe 10 can be tilted forward. Further, the stand pipe 10 has a saddle 9 at the upper end. A stand pipe holding frame 26 having a semi-circular tubular stand pipe storage portion 27 is erected on the stay support portion 25 immediately after the stand pipe 10. Vertical pipe holding frame 26
A notched elongated hole 24 is provided from the upper end of the rear part to the lower part. A connecting rod 13, which will be described later, is movably inserted vertically into the notched slot 24 when the standpipe 10 is tilted forward. Further, as shown in FIG. 6, the stopper 12 having the pin 38 is provided on the upper side portion of the vertical pipe holding frame 26, and the pin 38 is fitted and inserted into the pin locking hole 36 provided on the upper side portion of the vertical pipe 10. Be done. This stopper 12 is a stopper tube 3 provided on the side portion of the vertical pipe holding frame 26.
Spring 40 mounted on spring retainer 39 of pin 38 in 6
Is always urged toward the vertical pipe 10 side. That is,
As shown in FIG. 6A, the pin 38 has the same rod shape, and a spring retainer 39 having a large diameter is provided on the pin 38 at a position slightly inside the grip portion 41 side from the tip of the pin 38.
0 is locked so that the pin 38 always applies a pressing force toward the pin locking hole 36. As shown in FIG. 6B, the shape of the pin 38 according to another embodiment is thin from the tip of the pin 38 to which the spring 40 of the spring retainer 39 is attached, and the spring retainer 3
9 make the tip part thicker than the diameter of the spring 40, and
8, the pressing force is constantly applied in the direction of the pin locking hole 36.

A fixing plate 20 is provided at the rear end of each stay 8. The fixed plate 20 has a bracket 21 inside. The rear wheel axle 16 is mounted from the outside of the fixed plate 20 through the fixed plate 20 and the bracket 21, and the rear wheel 4 is mounted on the axle 16. Further, a mudguard 17 for the rear wheel 4 is provided on the upper end of the fixed plate 20 via a mudguard stay 35.

The bracket 21 of the fixed plate 20 has a vertical axis 22
The rod 19 is rotatably supported forward through the shaft. The length of the rod 21 is the left and right rear wheels 1 when the bicycle is ready to run.
The length is half the distance between 6 and 16. Left and right rod 2
The end portions on the center side of 1, 21 are the vertical axis 2 of the rod holding frame 32.
3 and 23 are pivotally supported. Therefore, when the bicycle is ready to run on a bicycle, it forms an isosceles triangle having the left and right rods 21, 21 as the bottom sides and the left and right stays 8, 8 as the two sides, and constitutes a rear frame of a folding three-wheeled bicycle.

A rigid connecting rod 1 is provided on the horizontal axis 34 of the holding frame 32.
3 is pivoted. The other end of the connecting rod 13 is pivotally supported by a horizontal shaft 14 provided at the rear portion of the upper end of the stand pipe 10. The length of the connecting rod 13 is set such that the standing pipe 10 stands vertically when the bicycle is in a bicycle traveling posture.

On both sides of the stay supporting portion 25 that axially supports the left and right stays 8, 8 by the vertical axes 29, 29, an elastic body 31 made of a rubber plate is in contact with the left and right stays 8, 8 when the travel is maximized during travel. , 31 with abutment plates 30 and 30.

The flexible shaft 18 extending from the drive shaft of the foot pedal 15 to the axle 34 of either the left or right rear wheel 4.
To arrange. The drive shaft of the foot pedal 15 and the tip of the flexible shaft 18 on the foot pedal side are engaged with each other by a bevel gear (not shown), and
The rear end of the flexible shaft 18 on the rear wheel side and the axle 16 of the rear wheel are similarly meshed with a bevel gear provided on both sides to form a driving force transmission mechanism. Although not shown, the rear wheel is provided with a brake for the rear wheel by a conventional means, and is further provided with a tail lamp and the like as appropriate.

A folding operation for narrowing the distance between the rear wheels when the folding tricycle 1 of the present invention is parked will be described.

In the assembled state as shown in FIGS. 1 and 2, the grip portion 41 of the stopper 12 is pulled against the spring 40 so that the pin 38 of the stopper 12 is lifted from the engagement of the pin locking hole 36 of the vertical pipe 10. When removed, the stand pipe 10 is free from the stand pipe holding frame 26. Then saddle 9
When a force is applied to the stand pipe 10 to incline it to the handle 5 side, the stand pipe 10 rotates about the support shaft 28. As the connecting rod 13 rotates, the connecting rod 13 has a notch elongated hole 24.
At this time, the rod holding frame 32 is pulled toward the standing pipe holding frame 27 side by the connecting rod 13 and approaches the left and right rods 19 and 19 and the left and right stays 8 and 8 to the left and right. The left and right rear wheels 4 and 4 attached via the fixing plates 20 and 20 also narrow their intervals. Then, finally, the left and right rods 19, 19 are attached to the back plate 33 of the rod holding frame 32 which has a predetermined width.
The side surface of the is in contact. In this way, the entire rear frame is brought into a state of parallel approach as shown in FIGS. 3 and 4,
Can be folded compactly.

When traveling the above-mentioned folded three-wheeled bicycle, the stand pipe 10 in the forward tilted state is used as the pipe accommodating portion 2.
When the support shaft 28 is rotated around the support shaft 28 to raise it, the stopper 12 slides on the outer peripheral surface of the stand pipe 10, and the stopper 1 is inserted into the pin locking hole provided in the stand pipe 10.
The second pin 38 is fitted and fixed by pressing the spring 40.
At this time, the left and right rods 19, 19 are pushed back by the connecting rod 13, and the left and right stays 8, 8 come into contact with the elastic body 31 of the contact plate 30, and the original state, that is, the traveling of FIGS. 1 and 2 is performed. Return to the state.

The structure of the drive mechanism for traveling the folding tricycle according to the present invention has already been described above. However, a bevel gear is fixed to the rear end of the flexible shaft 18, and one axle 1 of the left and right rear wheels is provided.
6 is engaged with the bevel gear fixedly attached to 6, and the foot pedal 15
The power from is finally transmitted to the rear wheels 4.

When the foot pedal 15 is depressed and the pedal shaft pivotally supported by the main pipe is rotated, the flexible shaft 18 is rotated via the bevel gear that meshes with the bevel gear fixed to the pedal shaft. The bevel gear fixed to the axle 16 of the rear wheel 4 is driven via the bevel gear connected to the end, and the rear wheel 4 is rotated to travel.

[0027]

As described above, in the folding three-wheeled bicycle of the present invention, when the saddle is pulled up by hand when traveling, the stand pipe stands upright on the stay support part and the stand pipe storage part of the stand pipe holding frame. Fit in. At the same time, the connecting rod connected to the shaft of the upper end of the stand pipe pushes the rod holding frame connected to the other end backward to straighten the left and right rods. Then, the left and right fixing plates are expanded, and accordingly, the left and right stays and the left and right wheels are also expanded to be in a running posture. When narrowing the distance between the left and right rear wheels when parking the bicycle, pull the grip of the stopper of the vertical pipe holding frame and tilt the saddle forward by hand to pull the connecting rod and move the rod holding frame forward. At the same time, the distance between the left and right stays and the left and right rear wheels is reduced. In this way, the entire rear frame is brought into a state in which the rear frames are close to each other and can be folded compactly. Therefore, assembling for traveling is simple and can be performed instantly, and the distance between the rear wheels during traveling is sufficiently wide, and stable traveling is possible. Further, when parking the bicycle, the distance between the rear wheels can be easily narrowed simply by pulling the stopper, and the space is saved.

Since the drive force transmission mechanism of the folding tricycle according to the present invention is composed of the bevel gear and the flexi shaft, the drive mechanism will not be disengaged even if the space between the left and right stays and the left and right wheels is changed. Also, when the vehicle is traveling, elastic bodies such as rubber plates provided on the abutment plate attached to the stay support portion come into contact with the outside of the left and right stays to elastically fix the left and right stays, so vibrations during traveling are properly absorbed. As a result, you can drive stably and comfortably.

As described above, the folding three-wheeled bicycle of the present invention has excellent operational effects not found in conventional three-wheeled bicycles.

[Brief description of drawings]

FIG. 1 is a plan view showing a traveling state of a folding tricycle according to the present invention.

FIG. 2 is a front view of a folding tricycle according to the present invention in a traveling state.

FIG. 3 is a plan view of the folding tricycle according to the present invention in a parked state.

FIG. 4 is a front view of the folding tricycle according to the present invention in a parked state.

FIG. 5 is an enlarged perspective view of the rear portion of the frame of the folding tricycle according to the present invention.

FIG. 6 is an enlarged partial cross-sectional view illustrating a fixed state of a stand pipe and a stand pipe holding frame by a stopper in a circle A in FIG. 5, (a) is a diagram showing an embodiment, and (b) is another diagram. It is a figure which shows an Example.

[Explanation of symbols]

 1 Folding tricycle 2 Main pipe 3 Front wheel 4 Rear wheel 5 Handle 6 Head pipe 7 Handle post 8 Stay 9 Saddle 10 Stand pipe 11 Spindle 12 Stopper 13 Connecting rod 14 Horizontal shaft 15 Pedal 16 Axle 17 Mudguard 18 Flexible shaft 19 Rod 20 Fixing plate 21 Bracket 22 Vertical axis 23 Vertical axis 24 Notched long hole 25 Stay support portion 26 Standing pipe holding frame 27 Standing pipe storage portion 28 Support shaft 29 Vertical axis 30 Contact plate 31 Elastic body 32 Rod holding frame 33 Back plate 34 Horizontal axis 35 Mudguard stay 36 Pin locking hole 37 Stopper tube 38 Pin 39 Spring retainer 40 Spring 41 Grip part

Claims (3)

[Claims] 1. A bicycle main frame comprises a main pipe and left and right stays following the main pipe, a head pipe having a handle and front wheels is provided at a front end of the main pipe, and a foot pedal is pivotally supported at a central portion of the main pipe.
The right and left stays are axially supported through the stay support parts at the rear ends of the main pipes, and the stand pipes having saddles at the upper ends are provided at the stay support parts, and the left and right rear wheels are respectively provided at the rear ends of the left and right stays. In a three-wheeled bicycle consisting of, the flexible shaft is arranged on the axle of the rear wheel on either side from the drive shaft of the foot pedal, the drive shaft of the foot pedal and the tip of the flexible shaft are meshed with a bevel gear, and the flexible shaft Bevel gears engage the rear end and either the left or right rear wheel axle to create a drive force transmission mechanism.
Brackets are provided inside the left and right fixing plates provided at the rear ends of the left and right stays, and the left and right brackets are rotatably pivoted forward in a state where the left and right rods are butted to the inner center.
The inner center part of the left and right rods is pivotally supported on a rod holding frame having a back plate of a predetermined lateral width in the rear part, and the left and right stays and the left and right rods constitute an isosceles triangle to form a rear part frame, which allows the vertical pipe to tilt forward. Pivotally supported on the support, and
A standpipe holding frame that stands and holds the standpipe at the rear is erected on the stay support part, and the top of the standpipe and the rod holding frame are connected by a connecting rod, and the standpipe is tilted forward and the rod is turned forward. A folding three-wheeled bicycle characterized in that the structure is such that the left and right rear wheels can be narrowed together with the left and right stays by interlocking the. 2. The stay supporting portion is provided with an abutting plate having an elastic body that comes into contact with the outer side portions of the left and right stays when the left and right stays are widened to the maximum during traveling. Folding tricycle. 3. The standing pipe holding frame is a semi-cylindrical standing pipe housing, a notch elongated hole for vertically movably inserting a connecting rod is provided in an upper rear portion of the standing pipe holding frame, and a stopper is provided on a side portion of the standing pipe housing. The stopper is always urged toward the vertical pipe by a spring so that the pin of the stopper is inserted into the pin locking hole on the side of the vertical pipe to lock the vertical pipe to the vertical pipe holding frame. The folding tricycle according to claim 1 or 2.