JP2014091393A - Deformation bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deformation bicycle capable of changing an interval between front and rear wheels so as to be usable by an adult and a child.SOLUTION: A deformation bicycle 1 includes a shaft-shaped frame base 7 extending in the width direction of the bicycle, a pair of frame extension parts extending in a horizontal direction from both ends of the frame base 7, a pair of front wheel units 3 fitted to the pair of frame extension parts at positions different from the frame base 7 in the horizontal direction, a shaft-shaped main frame 9 connected to the frame base 7 to be rotatable around a base rotational axis 7X and a main rotational axis 9X orthogonal to the axis 7X, and a holder for holding the main frame at predetermined rotational positions around the base rotational axis 7X and the main rotational axis 9X. The front-and-rear wheel interval L2 of a child bicycle where the main frame 9 is located on the front wheel unit 3 side is shorter than that of a basic form where the main frame 9 is located on a side opposite the front wheel unit 3.

Description

  The present invention relates to a modified bicycle capable of changing the front and rear wheel spacing.

  In a typical bicycle, a handle is attached to the upper part of a front wheel unit pivotally supported at the front end of the frame, and a rear wheel unit attached to the rear end of the frame is driven by a pedal attached to the frame. It is configured as follows. In many of such bicycles, the height of the saddle attached to the frame can be changed according to the physique of the driver. On the other hand, children's bicycles assembled using parts of a size suitable for children are prepared for children with greatly different physiques.

  In recent years, folding bicycles that can be folded at an intermediate portion of a frame so that transportation and the like can be easily performed have become widespread. In addition, as a folding bicycle, not only the height of the saddle, but also the height and position of the saddle and handle can be adjusted, and the front and rear wheels are supported by the frame via the swing arm, so that the height of the front and rear wheels relative to the frame In other words, an invention has been proposed in which the height of a frame of a grounded bicycle can be changed (see Patent Document 1).

Japanese Patent No. 4739627

  However, in the bicycle described in Patent Document 1, the height of the saddle and the handle and the like can be finely adjusted according to the physique of the driver, but the margin for adjusting the height of the saddle and the handle and the distance between the two is small. It is difficult to transform a bicycle to such an extent that it can be used for adults and children. In addition, since the front and rear wheel spacing cannot be changed, it is necessary to configure the child and the adult separately.

  The present invention has been devised to solve the problems included in the prior art, and can be changed to a degree that can be used for adults and children by changing the distance between the front and rear wheels. The purpose is to provide.

  In order to solve such a problem, according to one aspect of the present invention, there is provided a modified bicycle (1) capable of changing the front-rear wheel interval (L), and an axial frame base portion extending in the width direction of the bicycle ( 7), a pair of frame extending portions (8) extending from both ends of the frame base portion in the longitudinal direction of the bicycle, and a pair of base portions attached to the pair of frame extending portions at positions different from the frame base portion in the longitudinal direction of the bicycle A side wheel unit (3), a handle (5) for changing the orientation of the base side wheel unit with respect to the frame extending portion, a first rotation axis (7X) which is an axis of the frame base, and the first rotation axis An axial main frame (9) connected to the frame base so as to be rotatable around a second rotation axis (9X) perpendicular to the main axis, and the main frame with respect to the frame base A holding means (10) for holding at a predetermined rotational position (α · β) around the first and second rotation axes, a saddle (6), a pedal (13), and the pedal respectively provided on the main frame A rotational position of the main frame on the side (α = 0 °) opposite to the base side wheel unit with respect to the base of the frame about the first rotational axis. In the first mode (FIG. 1) held by the holding means, the base-side wheel unit has a first front-rear wheel interval (L1) and the main frame is about the first rotation axis with respect to the frame base. Is held by the holding means at a rotation position (for example, α = 180 °) on the same side as the first frame, and the main frame is rotated about the second rotation axis. In the second embodiment (FIG. 6) held in 180 ° different rotational positions (beta = 180 °), a structure having the first second front and rear wheels interval shorter than the front and rear wheels spacing (L2).

  According to this configuration, the distance between the front and rear wheels can be greatly changed, so that the modified bicycle can be used as an adult bicycle and a child bicycle.

  According to another aspect of the present invention, the apparatus further comprises folding means (11) for folding the main frame at an intermediate position, and the main frame has the frame-side wheel unit disposed above the first rotation axis. Rotation position (β = 90 °) where the main frame holds the frame side wheel unit in the width direction of the bicycle about the second rotation axis, and is held by the holding means at a rotation position (for example, α = 100 °). In the third mode (FIG. 10) in which the main frame is folded by the folding means and held by the holding means, the folded state can be achieved.

  According to this structure, the deformation | transformation bicycle which has a pair of base part side wheel unit can be folded, and can be changed small efficiently.

  According to another aspect of the present invention, the base side wheel unit has a motor (17) for driving a wheel (16), and an accelerator means (20) for adjusting the driving amount of the motor is provided on the handle. It can be set as the structure comprised.

  According to this structure, the deformation | transformation bicycle utilized as a bicycle for adults and a child can be made into an electrically assisted bicycle.

  Also, according to one aspect of the present invention, the holding means is in a rotational position (for example, α = 210 °) where the main frame is on the same side as the base side wheel unit with respect to the frame base about the first rotation axis. In the fourth mode (FIG. 8) held by the vehicle, a seat (23) attached between the pair of base-side wheel units is further provided so that the electric mobile vehicle (FIG. 8) is deformed. it can.

  According to this configuration, the application of the modified bicycle can be further expanded.

  Thus, according to the present invention, it is possible to provide a bicycle that can change the distance between the front and rear wheels and is deformable to the extent that it can be used for adults and children.

Side view of a modified bicycle according to the present invention Plan view of the modified bicycle shown in FIG. Front view of the modified bicycle shown in FIG. Side view of the modified bicycle shown in FIG. Side view of the modified bicycle shown in FIG. 1 in the process of transforming into a children's bicycle Side view of the modified bicycle shown in FIG. 1 transformed into a children's bicycle Side view of the modified bicycle shown in FIG. 1 transformed into a stroller Side view of the modified bicycle shown in FIG. Side view of the deformed bicycle shown in FIG. 1 in the process of being deformed into a folded state Side view of the deformed bicycle shown in FIG. 1 deformed into a folded state

  Hereinafter, an embodiment of a modified bicycle 1 according to the present invention will be described in detail with reference to the drawings. In the description, names are given to the respective parts on the basis of when the modified bicycle 1 is in the basic form shown in FIGS. 1 to 3, while when the modified bicycle 1 is in a predetermined form, The front and back shall be determined based on this. Further, the side view shows a side surface when the front wheel unit 3 to be described later is deformed with a fixed direction. Therefore, in one form of side view, the front-rear direction is switched between the left and right sides of the page, and in another form of side view, the rear wheel 12 described later may be positioned in the traveling direction (front).

  As shown in FIGS. 1 to 3, the basic modified bicycle 1 is a three-wheel bicycle used for adults, and includes a frame 2, a pair of left and right front wheel units 3 attached to the front portion of the frame 2, and a frame. 2, a rear wheel unit 4 attached to the rear part, a pair of left and right handles 5 used for gripping the driver and changing the direction of the wheels of both front wheel units 3, and a saddle 6 used for seating the driver. It is provided as a main component. In this basic form, the right side of FIGS. 1 and 2 is the front, and the modified bicycle 1 has a front-rear wheel interval L1.

  The frame 2 includes a shaft-like frame base portion 7 extending in the width direction of the modified bicycle 1 at a position relatively close to the front wheel unit 3, a pair of left and right frame extending portions 8 extending obliquely forward from both ends of the frame base portion 7, It is comprised from the axial main frame 9 extended back diagonally downward from the center of the left-right direction of the base 7. As shown in FIG. Here, both the frame extending portions 8 and the main frame 9 extend in parallel to each other and are orthogonal to the frame base portion 7.

  The main frame 9 is rotatable about the base rotation axis 7X, which is the axis of the frame base 7, and the main rotation axis 9X, which is the axis of the main frame 9 orthogonal to the base rotation axis 7X, via the holder 10. 7 is connected. The holder 10 may have a known configuration, and although not shown in the drawings, for example, by having a groove and a pin that fits into the groove, the holder 10 rotates around the base rotation axis 7X with respect to the frame base 7 of the main frame 9. The angle α (FIG. 1) is held at a preset value, and the rotation angle β (FIG. 3) around the main portion rotation axis 9X with respect to the frame base portion 7 of the main frame 9 is held at a preset value. Hereinafter, the rotation angle α around the base rotation axis 7X and the rotation angle β around the main rotation axis 9X are based on the extending direction and rotation position of the main frame 9 in the basic form. Therefore, in the basic form, the main frame 9 is held at 0 degrees around the base rotation axis 7X and the main rotation axis 9X with respect to the frame base 7 (α = β = 0 °).

  A folding mechanism 11 capable of folding the main frame 9 in the horizontal direction in the basic form is provided at a position of about 1/3 to 1/4 from the front end of the main frame 9. The folding mechanism 11 may have a known configuration, in which a pair of flanges hinged to the connecting ends of the main frame front part 9a and the main frame rear part 9b divided in the front and rear are provided, and the two flanges overlap each other. By being fixed in the state, these constitute one main frame 9 which is linear.

  The rear wheel unit 4 includes a rear wheel 12, a pedal 13 for driving the rear wheel 12, a chain 14, and the like, and is attached to the main frame rear portion 9 b. The main frame rear portion 9b is bifurcated rearward and supports the rear wheel 12 so as to sandwich the rear wheel 12 from the left and right at the rear end. Further, the saddle 6 is attached to the rear portion 9b of the main frame via a post 15 that is telescopic by a telescope structure.

  Both front wheel units 3 include a front wheel 16 and a motor 17 that drives the front wheel 16, and are connected by a link mechanism (not shown) so that the steering angles of the left and right front wheels 16 are the same. Both front wheel units 3 are attached to the lower ends of both handles 5 provided at positions in front of the frame base 7 in both frame extending portions 8 so as to be substantially orthogonal to both frame extending portions 8 in a side view. The steering wheel 5 is rotated about the support portion of the frame extending portion 8 to change the direction of the front wheel 16.

  A battery 18 and a battery storage case 19 that stores the battery 18 are disposed between the front wheels 16. The battery housing case 19 is suspended by both the frame extending portions 8 and the frame base portion 7. The battery 18 is electrically connected to both motors 17 via an operation switch 20 provided on the handle 5. The operation switch 20 is provided with a power operation button, an assist mode in which the motor 17 exerts a driving force in accordance with the depression force of the pedal 13, an electric mode in which the motor 17 drives the front wheels 16 without rotating the pedal 13, and the like. Is set. Further, the operation switch 20 is provided with a drive amount operation button so that the drive amount of the motor 17 in each mode can be adjusted.

  Both handles 5 are rotatably supported by both frame extending portions 8 and are telescopic and rotatable by a telescope structure (the direction of the grip 5a is rotatable without manipulating the front wheel 16). . Both the handles 5 are preferably fixed at a rotational position in which the side ends of the grip 5a face obliquely rearward. Although not shown, a known brake lever is attached to the handle 5 so as to be rotatable with respect to the grip 5a so that the front wheel 16 and the rear wheel 12 can be braked.

  Both frame extending portions 8 are configured such that the front portion rotates and various attachments can be attached. Although illustration is omitted, in a basic form, a shopping basket or the like can be attached to both frame extending portions 8.

  As shown in FIG. 4, by attaching a child seat 21 as an attachment to both frame extending portions 8, a child-riding bicycle can be obtained. In front of the child seat 21, a grip bar 22 extending left and right is provided.

  Next, with reference to FIG. 5 and FIG. 6, the procedure for transforming the modified bicycle 1 of the basic form into the form of a children's bicycle will be described. First, as shown in FIG. 5, the saddle 6 is lowered, the fixing around the main part rotation axis 9 </ b> X is released by the holder 10, and the main frame 9 is rotated 180 degrees around the main part rotation axis 9 </ b> X with respect to the frame base 7. The angle of the main frame 9 is maintained in this state (β = 180 °). Next, fixing around the base rotation axis 7 </ b> X is released by the holder 10, and the main frame 9 is rotated relative to the frame base 7 in the arrow direction (clockwise) indicated by a virtual line around the base rotation axis 7 </ b> X.

  Then, as shown in FIG. 6, the main frame 9 is held by the holder 10 with the rotation angle α around the base rotation axis 7 </ b> X of the main frame 9 with respect to the frame base 7 being 180 degrees, and both the handles 5 are shortened. At the same time, the deformed bicycle 1 can be transformed into a children's bicycle by rotating the side end thereof to face backward. In this form, the left side of the figure is the front. In the form of children's bicycle, the modified bicycle 1 has the front and rear wheel spacing L2, and the front and rear wheel spacing L is significantly smaller than the basic configuration (L2 <L1). In the present embodiment, since both the handles 5 are substantially orthogonal to the both frame extending portions 8 in a side view, and the main frame 9 is rotated by 180 degrees about the base rotation axis 7X, the amount of reduction of the front and rear wheel spacing L is The distance (offset amount) l between the frame base portion 7 and the handle support portion at the frame extending portion 8 is about twice.

  FIG. 7 shows a form in which the modified bicycle 1 is transformed into a stroller. When transforming the deformed bicycle 1 from the basic form into a stroller, unlike the transforming procedure to the children's bicycle, the base rotation without rotating the main frame 9 about the main rotation axis 9X relative to the frame base 7 Rotate only around axis 7X. Here, the rotation angle α around the base rotation axis 7X with respect to the frame base 7 of the main frame 9 is approximately 210 degrees. The handle 5 may be expanded and contracted according to the height of the person pushing the stroller. Although it is not necessary to rotate the direction of the grip 5a, when using a brake, the grip position is adjusted by rotating the brake lever. Then, by attaching the child seat 21 of the attachment to the frame extending portion 8, the deformed bicycle 1 is deformed into a stroller.

  On the other hand, as shown in FIG. 8, by changing the direction of the seat 23 to be attached and rotating the direction of the grip 5a of the handle 5, the deformed bicycle 1 is deformed into an electric vehicle. By using the seat 23 having an adult size, it can be used as an electric senior car or the like. Also in the form of the electric vehicle, the rotation angle α around the base rotation axis 7X with respect to the frame base 7 of the main frame 9 is approximately 210 degrees.

  In the seat 23 of the electric vehicle, the grip bar 22 is disposed not on the front side of the seat 23 but on the back side, and supports the seat 23. You may make it provide the step for footrest which is not shown in figure as needed. Further, when the modified bicycle 1 is used as an electric mobile vehicle, the front wheel 16 side (left side in the figure) is forward. Therefore, a mode changeover switch is provided in the operation switch 20 so as to reverse the rotation direction of the motor 17 according to the mode, or according to the output of the sensor that detects the rotation angle α around the base rotation axis 7X of the main frame 9. The rotation direction of the motor 17 may be reversed.

  Finally, with reference to FIG. 9 and FIG. 10, a procedure for deforming the deformable bicycle 1 from the basic form to the folded state will be described. First, as shown in FIG. 9, the saddle 6 is lowered, the fixing around the main part rotation axis 9 </ b> X is released by the holder 10, and the main frame 9 is rotated to rotate around the main part rotation axis 9 </ b> X with respect to the frame base 7. The main frame 9 is held by the holder 10 in a state where the rotation angle β is 90 degrees. Next, the fixing about the base rotation axis 7X is released, the main frame 9 is rotated in the direction of the arrow (clockwise), and the rotation angle α around the base rotation axis 7X with respect to the frame base 7 is about 100 degrees. The main frame 9 is held by the holder 10.

  Further, the main frame front portion 9a and the main frame rear portion 9b are unfixed by the folding mechanism 11, and the main frame rear portion 9b is accommodated between the two frame extending portions 8 (between both front wheel units 3) as shown in FIG. The deformed bicycle 1 can be brought into the smallest folded state by expanding and contracting both the handles 5 and rotating the handles 5 so that the grip 5a faces inward as required.

  Thus, the main frame 9 is attached to the frame base 7 so as to be rotatable about the main rotation axis 9X and the base rotation axis 7X, and the front wheel unit 3 is different from the frame base 7 in the frame extending portion 8 in the front-rear direction. By being provided at the position, the front-rear wheel interval L changes according to the rotation angle α around the base rotation axis 7X of the main frame 9, and the deformed bicycle 1 is transformed into a child bicycle having a shorter front-rear wheel interval L2. Can do.

  In the present embodiment, a folding mechanism 11 is provided in the main frame 9, the main frame 9 is folded in a state in which the main frame 9 is rotated 90 degrees around the main portion rotation axis 9 </ b> X with respect to the frame base portion 7, and the rear wheel unit 4. Can be deformed so as to be accommodated between the front wheel units 3, the deformed bicycle 1 having the pair of front wheel units 3 can be efficiently deformed to be small.

  Further, in the present embodiment, the motor 17 for driving the front wheel 16 is provided in the front wheel unit 3, and the driving amount of the motor 17 can be operated by the operation switch 20 provided on the handle 5, so that it can be used as a bicycle for adults and children. The deformed bicycle 1 can be an electric assist bicycle or an electric bicycle.

  Furthermore, in this embodiment, by providing the seat 23 between the front wheel units 3 in a state where the rotation angle α around the base rotation axis 7X of the main frame 9 is held at 210 degrees which is the same side as the front wheel unit 3. The deformable bicycle 1 can be transformed into an electric mobile vehicle, and its application can be further expanded.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the above embodiment, the holder 10 is configured to hold the main frame 9 at a rotation angle set in advance (stepwise) about the base rotation axis 7X and the main rotation axis 9X. You may comprise so that it can hold | maintain steplessly at a desired rotation angle. In the above embodiment, in the form of the bicycle for children, the rotation angle α around the base rotation axis 7X of the main frame 9 is set to 180 degrees, but if it is located on the same side as the front wheel unit 3, The main frame 9 may be held at any angle. In addition, the specific configuration, arrangement, angle, and the like of each member and part can be changed as appropriate without departing from the spirit of the present invention. On the other hand, all the components of the modified bicycle 1 according to the present invention shown in the above embodiment are not necessarily essential, and can be appropriately selected.

1 Modified bicycle 2 Frame 3 Front wheel unit (base wheel unit)
4 Rear wheel unit (frame side wheel unit)
5 Handle 6 Saddle 7 Frame base 7X Base rotation axis (first rotation axis)
8 Frame extension part 9 Main frame 9X Main part rotation axis (first rotation axis)
10 Holder (holding means)
11 Folding mechanism 12 Rear wheel 13 Pedal 16 Front wheel 17 Motor 20 Operation switch (accelerator means)
23 Seat L Front-rear wheel spacing α Rotation angle of main frame base rotation axis 7X relative to frame base β Rotation angle of main frame main axis rotation axis 9X relative to frame base

Claims (4)

A modified bicycle that can change the distance between the front and rear wheels,
An axial frame base extending in the width direction of the bicycle;
A pair of frame extending portions extending in the front-rear direction of the bicycle from both ends of the frame base;
A pair of base-side wheel units attached to the pair of frame extending portions at positions different from the frame base in the front-rear direction of the bicycle;
A handle for changing a direction of the base side wheel unit with respect to the frame extending portion;
An axial main frame connected to the frame base so as to be rotatable about a first rotation axis that is an axis of the frame base and a second rotation axis that is orthogonal to the first rotation axis;
Holding means for holding the main frame at a predetermined rotational position around the first and second rotation axes with respect to the frame base;
A saddle, a pedal and a frame-side wheel unit driven by the pedal respectively provided on the main frame,
In the first mode in which the main frame is held by the holding means at a rotational position on the side opposite to the base side wheel unit with respect to the frame base about the first rotation axis, the first front and rear wheels have an interval. The main frame is held by the holding means at a rotational position on the same side as the base-side wheel unit with respect to the frame base about the first rotation axis, and the main frame is about the second rotation axis In the second form held at a rotational position 180 degrees different from the rotational position of the first form, the modified bicycle has a second front and rear wheel interval shorter than the first front and rear wheel interval. A folding means for folding the main frame at an intermediate position;
The main frame is held by the holding means at a rotational position where the frame side wheel unit is disposed above the first rotation axis, and the main frame bicycles the frame side wheel unit about the second rotation axis. 2. The modified bicycle according to claim 1, wherein the bicycle is in a folded state in a third form in which the main frame is folded by the folding means and is held by the holding means at a rotational position directed in the width direction of the main body. . The base side wheel unit has a motor for driving the wheel,
The modified bicycle according to claim 1 or 2, wherein an accelerator means for adjusting a driving amount of the motor is provided on the handle.   In the fourth mode in which the main frame is held by the holding means at a rotational position on the same side as the base side wheel unit with respect to the frame base about the first rotation axis, between the pair of base side wheel units. The deformable bicycle according to claim 3, wherein the deformable bicycle is further transformed into an electric mobile vehicle by further including a seat attached to the vehicle.

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