JP2001130470A - Knock-down bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knock-down bicycle capable of being disassembled and reassembled in short time without requiring any special tool possibly required at the time of disassembly and storing in a cabin compactly with high flexibility. SOLUTION: In this knock-down bicycle, a front fork 2 is pivoted steerably at the front end part of a main frame 1 through a steering shaft 15, a saddle stay 4 is installed vertically at the rear end part of the main frame 1, and rear forks 3 and 21 are extended for installation. The front and rear forks 2 and 3 and the saddle stay 4 are formed foldably along the main frame 1, and a power transmission module 5 forming one 21 of the rear forks is formed detachably from a crankshaft 11 and a rear shaft 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling bicycle that can be mounted on a vehicle without a trunk room or a light vehicle with a small luggage room without occupying the vehicle room.

[0002]

2. Description of the Related Art A conventional folding bicycle is disclosed in JP-A-8-33.
No. 2,984, the main frame is folded in a plane including the front and rear wheels, or the main frame disclosed in JP-A-6-59198 is folded on a vertical axis to overlap the front and rear wheels. The mainstream structure is such that the main frame is folded into two, such as a type that allows the main frame to be bent. Alternatively, as disclosed in Japanese Patent Application Laid-Open No. 6-1276, each frame is arranged in a parallelogram, and when folded, the frames are folded straight on the main frame.

[0003]

However, Japanese Patent Application Laid-Open Nos. 8-332988 and 6-5919 mentioned above.
In the device disclosed in Japanese Patent Publication No. 8, the front and rear lengths are short even when folded, and it is difficult to arrange a chain case or the like as a power transmission unit, and the effect of downsizing is not so much expected. . Further, in the structure disclosed in Japanese Patent Application Laid-Open No. 6-1276, folding a frame arranged in a parallelogram has the adverse effect of increasing the distance between the front and rear wheels. Therefore, as a solution to the processing of the chain at the time of folding of the rear wheel drive type using the chain and enabling more compact storage, a front wheel drive system as disclosed in JP-A-6-99871 has been proposed. The disassembly or assembly type adopted has also been proposed. However, in this type, since both the front and rear wheels together with the drive unit are stored in the main body, it is difficult to say that the thickness in the width direction of the vehicle body is so compact, and the storage position during transportation by car is limited. The degree of freedom of storage was poor.

Accordingly, the present invention solves the above-mentioned problems of the conventional foldable bicycle or assemble-type bicycle, and enables disassembly and assembly in a short time without requiring special tools and the like which are often used during disassembly. SUMMARY OF THE INVENTION It is an object of the present invention to provide an assembled bicycle that can be more compactly stored in a vehicle compartment with a high degree of freedom.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a front fork is rotatably supported on a front end of a main frame by a steering shaft, and a saddle stay is erected at a rear end of the main frame. The front and rear forks and saddle stays are configured to be freely foldable along the main frame, and the power transmission module forming one of the rear forks is arranged with respect to the crankshaft and the rear shaft. It is characterized by being configured to be detachable. Further, the present invention is characterized in that one of the rear forks is incorporated in the power transmission module. Further, the present invention is characterized in that the front fork is folded rearward by offsetting a center line of a steering shaft standing upright on the front fork and a steering shaft back and forth. Further, according to the present invention, when the power transmission module is mounted on a crankshaft, a support portion for holding the upright state of the saddle stay is formed on a fork after being incorporated in the power transmission module. It is. Further, the invention is characterized in that the front fork is hinge-supported by a hinge member pivotally supported on a steering shaft at a front end of a main frame. Further, the present invention is characterized in that the lower end of the steering shaft is attached to the front fork so as to be immovable in the rotation direction and the axial direction. Further, the present invention is characterized in that the rear fork is folded so as to be attached to a side surface of the main frame. Further, the invention is characterized in that the saddle stay is configured to be folded so as to be attached to the upper surface of the main frame. Further, the present invention is characterized in that the steering shaft is configured to be foldable or extendable. Further, the present invention is characterized in that a headrest of an automobile is mounted on an upper end portion of the saddle stay via a fixture. Further, the present invention is characterized in that the power transmission module is constituted by a chain or a silent belt driving mechanism. Further, the present invention is characterized in that the power transmission module is constituted by a drive shaft drive mechanism, and these are used as means for solving the problems.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of an assembled bicycle according to the present invention. FIG. 1 (A) is an exploded perspective view of the entire bicycle, and FIG. 1 (B) is an enlarged explanatory view of a portion A in FIG. 1 (A). is there. In the present invention, a steering shaft 15 is provided at the front end of the main frame 1.
, The front fork 2 is rotatably supported, the saddle stay 4 is erected at the rear end of the main frame 1 and the rear forks 3, 21 are extended. And the saddle stay 4 is configured to be freely foldable along the main frame 1, and the power transmission module 5 constituting one of the rear forks (21) is configured to be detachable from the crankshaft 11 and the rear shaft 24. It is characterized by the following.

As shown in FIG. 1 (A), the front fork 2 which fixes the front wheel 9 with a one-touch screw 27 and supports the front wheel 9 at the lower end thereof is rotatable about the steering shaft 15 at the front end of the main frame 1. The front fork hinge 12 hinge-supports the supported hinge member 23. With this configuration, the center line of the steering shaft 6 having the handlebar 7 erected and fixed to the front fork 2 at the upper end and the steering shaft 15 can be offset forward and backward. Can be folded back like a chain line. As shown in FIG. 1 (B), which is an enlarged view of the portion A in FIG. 1 (A), in the present embodiment, when the handlebar 7 is turned, the steering shaft 6 and the fork 2 are made to behave integrally. The following configuration is employed as a configuration in which the lower end portion of the steering shaft 6 is immovably mounted on the front fork 2 in the rotational direction and the axial direction. With the lower end of the steering shaft 6 inserted in the hole on the upper surface of the hinge member 23 (not shown) in advance, the flange 6A and the key 6B are connected to the hinge member 23.
Will be located on the upper surface of. A stepped portion 2A for receiving the flange 6A and a key groove 2B for receiving the key 6B are formed at corresponding positions on the upper surface of the front fork 2.
Thus, when the front fork 2 is assembled in the running state, the steering shaft 6 is mounted on the front fork 2 so as not to be movable in the rotation direction and the axial direction, and good handling is performed.

At the rear end of the main frame 1, a saddle stay 4 is configured to be folded to be attached to the upper surface of the main frame 1 by a saddle stay hinge 14,
The left rear fork 3 (the right rear fork 21, which is covered with a chain case 25 to be described later and constitutes the power transmission module 5 and incorporated therein), which is the other of the rear forks, is main-driven by the rear fork hinge 13. It is configured to be folded to be attached to the side surface of the frame 1. A crankshaft 11 driven by left and right pedals 16 and 17 is provided near the front end hinge of the left rear fork 3.
Is supported. At the rear end of the left rear fork 3, the rear wheel 10 is fixed and supported by a one-touch screw 28, and the crankshaft 11 and the rear shaft 24 of the rear wheel 10 are
Drive sprocket 18 and rear sprocket 20 in power transmission module 5 constituting one of the rear forks
Are detachably mounted.

The power transmission module 5 includes a right rear fork 2 covered with a chain case 25 and incorporated therein.
The drive sprocket 18 and the rear sprocket 20 are supported at the front and rear of the vehicle 1 and a chain 19 is stretched therebetween. A saddle stay support portion 22 is formed above the shaft portion of the drive sprocket 18 in the right rear fork 21. When the power transmission module 5 is mounted on the vehicle body, the saddle stay support portion 22 is attached to the saddle stay 4. By engaging and locking, the running upright position of the saddle stay 4 is securely held. A saddle 8 is attached to the upper end of the saddle stay 4 by a fixture 29 with a reflector so that the vertical mounting position can be adjusted. In such a state, the main frame 1 and the left and right rear frames 3 and 21 are integrally fastened by the thumb screws 26, 26 inserted from below. As the power transmission module 5,
Instead of the illustrated chain drive mechanism, an endless rubber belt-shaped silent belt drive mechanism in which a drive gear and a rear gear and teeth meshing with them are engraved on the inner periphery may be adopted, or the drive gear and the rear gear A drive shaft drive mechanism provided with bevel teeth meshing with the bevel teeth at the front and rear ends may be employed.

FIGS. 2 and 3 are enlarged perspective views of essential parts showing a second embodiment of the assembled bicycle according to the present invention. In the present embodiment, the lower end of the steering shaft 6 cannot be moved in the rotation direction and the axial direction with respect to the front fork 2 in order to cause the steering shaft 6 and the fork 2 to behave integrally when the handlebar 7 turns. As shown in FIG. 3 in which the front fork 2 is folded rearward, the hinge member 23 is mounted in the running state.
The square shaft portion 3 formed below the flange 6 of the steering shaft 6 with respect to the square holes 23 </ b> C and 2 </ b> C drilled at the alignment position between the upper surface of the front fork 2 and the upper surface of the front fork 2.
By properly inserting the steering wheel 3, the steering shaft 6, the front fork 2, and the hinge member 23 behave integrally, so that good handling by the hambol bar 7 is performed. A retaining member 39 formed of a spring or the like is provided on the square shaft portion 33 at the lower end portion of the steering shaft 6, so that the steering shaft 6 does not fall off during traveling. Reference numeral 31 denotes a folding lever provided on the upper surface of the front fork 2.

FIG. 4 is an enlarged perspective view of a main part of a prefabricated bicycle according to a third embodiment of the present invention. In this embodiment, the headrest of the vehicle is fixed to the upper end of the saddle stay 4 via a fixture 34. 35 is mounted. In the present embodiment, instead of the saddle 8 in the above-described embodiment, a headrest fixing device 34 including substantially H-shaped mounting pipes 34A and 34B is attached to an upper end portion of the saddle stay 4 by a stay mounting pipe 34C. Attachment pipes 34A, 34B of the headrest fixture 34 are attached to attachment legs 35A, 35B of the headrest 35 detached from the vehicle seat back.
The stay mounting pipe 34C is fixed to the mounting hole 37 of the stay mounting pipe 34C and the mounting hole 38 of the saddle stay 4 by screwing the mounting screw 36 into the saddle. It is attached to the stay 4.

FIG. 5 is a perspective view of a main part of a modular bicycle according to a fourth embodiment of the present invention. In this embodiment, the steering shaft 6 is configured to be foldable or extendable. In the present embodiment, the steering shaft 6 is divided into an upper portion 6U and a lower portion 6D, and is configured to be freely bendable by a folding shaft 40. Upper 6U and lower 6D
When the vehicle is in a straight running state, the united cylinder 41 is
By fixing the steering shaft 6 in the vicinity, the steering shaft 6 can be held straight. Although not shown,
The steering shaft 6 is composed of a combination of upper and lower portions 6U and 6D of different diameters which are slidably fixed to each other, so that the length can be reduced to be compact.

Although the embodiments of the present invention have been described above, the shapes of the main frame, the front and rear forks, the hinge members, the saddle stays, the shapes of the power transmission module, and the shapes of the main frames are within the scope of the present invention. Related configurations such as the folding configuration to the main frame, the fixing configuration of the steering shaft to the front fork, the mounting configuration of the power transmission module to the crankshaft and the rear shaft, the mounting configuration of the saddle and headrest to the saddle stay, the axis of the crankshaft to the rear frame The support form, the storage processing form of the brake device accompanying the removal of the steering shaft, and the like can be appropriately adopted.

[0014]

As described above in detail, according to the present invention, the front fork is pivotally supported on the front end of the main frame by the steering shaft, and the saddle stay is erected on the rear end of the main frame. In the assembled bicycle in which the rear fork is installed and extended, the front and rear forks and the saddle stay are configured to be freely foldable along the main frame, and the power transmission module forming one of the rear forks is constituted by a crankshaft and Because it is configured to be detachable from the rear shaft, the other of the main components, the front and rear forks, saddle stays, and rear forks, can be easily and quickly folded down along the main frame using only each hinge shaft to make it compact or assembled. Can be used for traveling. Moreover, since the power transmission module, which tends to be difficult to handle when folded, can be removed, it is possible to work without contaminating fingers and the like with lubricating oil, and if necessary, a power transmission module with a multi-stage transmission can be selected and replaced. In addition to being able to have component functions, the storage layout can be selected relatively freely when it is stored in the vehicle interior.

Further, since one of the rear forks is incorporated in the power transmission module, the power transmission module itself can be paired with the other rear fork and firmly support the rear wheel during assembly. The positional relationship between the power transmission components such as sprockets and chains can be maintained by the rear fork. Further, the center line of the steering shaft fixed to the front fork and the steering shaft are offset forward and backward so that the front fork can be folded rearward, so that the steering shaft can be easily attached and detached, and Without disassembling the steering shaft, the front fork can be compacted simply by folding it backward. Furthermore, when the power transmission module is mounted on a crankshaft, the fork is incorporated into the power transmission module and then a fork is provided with a support portion for holding the saddle stay in an upright state. The main assembly can be performed in a single process without using special fixing means, and the running up position of the saddle stay can be reliably held.

The front fork is hingedly supported by a hinge member rotatably supported on a steering shaft at a front end of the main frame, so that the steering shaft is integrated with the front fork using the hinge member. The front fork can be folded, fixed or separated. Further, by mounting the lower end of the steering shaft to the front fork so as not to move in the rotation direction and the axial direction, the traveling state and the folding state of the front fork can be easily performed only by attaching / detaching the steering shaft to / from the front fork. Can be obtained. Furthermore, the main fork is configured to be folded to be attached to the side surface of the main frame, and the saddle stay is configured to be folded to be attached to the upper surface of the main frame. Each part is folded without overlapping each side of the frame, so that it is compact with minimal folding volume.

Further, since the steering shaft is configured to be foldable or extendable, the steering shaft, which is a relatively long component, can be stored compactly. Furthermore, since the headrest of the vehicle is mounted on the upper end of the saddle stay via a fixture, the headrest of the vehicle, which is a transportable vehicle for an assemblable bicycle, can be removed and used as it is. It is not necessary to do so, and the storage space can be made smaller. Furthermore, by appropriately selecting a chain or a silent belt drive mechanism or a drive shaft drive mechanism for the power transmission module, a drive mechanism corresponding to each required type can be provided. As described above, according to the present invention, there is no need for a special tool or the like which is likely to occur during disassembly,
There is provided an assembled bicycle which can be disassembled and assembled in a short time, and can be more compactly stored in a vehicle compartment with a high degree of freedom.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of an assembled bicycle according to the present invention. FIG. 1 (A) is an exploded perspective view of the entire bicycle, and FIG. 1 (B).
FIG. 2 is an enlarged explanatory view of a portion A in FIG.

FIG. 2 is an enlarged perspective view of a main part of the assembled bicycle according to a second embodiment of the present invention, showing an assembled traveling state.

FIG. 3 shows the same folded state.

FIG. 4 is an enlarged perspective view of a main part showing a third embodiment of the assembled bicycle according to the present invention.

FIG. 5 is a perspective view of a main part showing a fourth embodiment of the assembled bicycle according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main frame 2 Front fork 3 Left rear fork 4 Saddle stay 5 Power transmission module 6 Steering shaft 11 Crankshaft 12 Front fork hinge 13 Rear fork hinge 14 Saddle hinge 15 Steering shaft 18 Drive sprocket 19 Chain 20 Rear sprocket 21 Right rear fork 22 Saddle Stay support part 23 Hinge member 24 Rear shaft 25 Chain case

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koichi Imamura 1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Fuji Heavy Industries, Ltd. Fuji Heavy Industries Ltd. (72) Inventor Mamoru Sekiguchi 1-7-2 Nishi Shinjuku, Shinjuku-ku, Tokyo F-term in Fuji Heavy Industries Ltd. (Reference) 3D012 BA02 BA03

Claims (12)

[Claims] 1. An assembled bicycle in which a front fork is pivotally supported on a front end of a main frame by a steering shaft, a saddle stay is erected at a rear end of the main frame, and a rear fork is extended. The front and rear forks and the saddle stay are configured to be freely foldable along the main frame, and the power transmission module forming one of the rear forks is configured to be detachable from the crankshaft and the rear shaft. Assembled bicycle. 2. The power transmission module according to claim 1, wherein one of the rear forks is incorporated in the power transmission module.
The assembled bicycle described in the above. 3. The front fork can be folded rearward by offsetting a center line of a steering shaft that is fixed to the front fork and a steering shaft back and forth. The assembled bicycle described in the above. 4. A support for holding the upright state of the saddle stay formed on a fork after being incorporated in the power transmission module when the power transmission module is mounted on a crankshaft. Item 4. The assembled bicycle according to any one of Items 1 to 3. 5. The assembly according to claim 1, wherein the front fork is hinged to a hinge member rotatably supported on a steering shaft at a front end of a main frame. Expression bicycle. 6. The assembled bicycle according to claim 1, wherein a lower end portion of the steering shaft is attached to the front fork so as to be immovable in a rotational direction and an axial direction. 7. The assembled bicycle according to claim 1, wherein the rear fork is folded so as to be attached to a side surface of the main frame. 8. The assembled bicycle according to claim 1, wherein the saddle stay is folded so as to be attached to an upper surface of a main frame. 9. The assembled bicycle according to claim 1, wherein said steering shaft is configured to be foldable or extendable. 10. The assembled bicycle according to claim 1, wherein a headrest of an automobile is mounted on an upper end of the saddle stay via a fixture. 11. The assembled bicycle according to claim 1, wherein the power transmission module is constituted by a chain or a silent belt driving mechanism. 12. The assembled bicycle according to claim 1, wherein the power transmission module comprises a drive shaft drive mechanism.