JP2005161930A - Folding bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core type folding bicycle to fold a frame at a center part capable of solving such problems that the rigidity of the frame, the folding function of components and weight reduction must be promoted. <P>SOLUTION: The folding bicycle includes a module group for enhancing reinforcement, storage property and portability of the core type folding bicycle by providing a storage type frame reinforcing mechanism by a frame and a cable in which pneumatic pressure is utilized in enhancing the rigidity and reducing the weight of the frame, a single side folding mechanism of handle bars, an expansion type folding mechanism of a steering shaft, an acute angle folding unit of the operation cable, a folding mechanism of the steering shaft, a rotary type folding mechanism of a pedal, and a small diameter tire or the like with the air volume increased. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  It relates to folding bicycles.

  The present invention relates to a core type folding bicycle in which a main frame can be divided and folded at the center.

  For a folding bicycle, it is essential to have rigidity, weight reduction, and storage in other parts as well as the main frame.

  The storage of the handle tends to be surprisingly complicated. The present invention module A realizes simplification of the handle portion in consideration of the adoption of a coaster brake.

  For storing the handle shaft, a method of separating and bending the handle shaft has been generally used. The module B of the present invention provides a mechanism capable of extending and retracting the control shaft.

  It was difficult to bend the operation cable attached to the bicycle to an acute angle without any trouble. The module C of the present invention provides a component that can deflect the cable at an acute angle.

  In a core type frame with joints concentrated in the center of the bicycle, a cable steering system must be used to bend the steering wheel control shaft in the direction of the front wheels in the running surface. The module D of the present invention is an invention that enables storage by a method of bending a frame.

  The storage of the pedal was due to the improvement of the pedal depression. In this case, too, the pedal protruded outside the rotating surface of the crank and the storage effect was small. The module E of the present invention completely realized storage within the crank rotation surface.

  In the core frame with the joints concentrated in the center of the bicycle, the front wheel frame and the rear wheel frame were inverted V-shaped, making it difficult to obtain strength. The module F of the present invention provides a reinforcing method that can be easily stored such as a cable.

  An element that makes it difficult to reduce the weight of a folding bicycle is a tire. In general, the tire performance requires a large diameter. The module G of the present invention provides a small-diameter tire that has a small amount of air but has a large amount of air and good running performance.

The weight reduction and reinforcement of the frame are performed by covering a lightweight pipe such as aluminum with a carbon sheet. The module H of the present invention further provides a structural material whose strength is improved by the internal air pressure.
Japanese Patent Application No. 2001-253626 Interpress Co., Ltd. World's Folding / Compact Bikes Vol. 6

  As a problem to be solved, there is a tendency that the improvement of the storing property of the folding bicycle has a complicated structure, the number of storing operations increases, and the weight increases.

  The present invention provides a module group in consideration of the development of a simple storage mechanism, a lightweight structure, and the maintenance of strength.

  Module A is excellent in operability, storage, and strength reliability. Module B has excellent operability and simple storage. Module C can be expected to solve the difficulty of storage at once. Module D allows the frame to be used for retracting the control axis in the most difficult core frame. Module E is the most stowable invention that overturns the concept of the conventional pedal storage mechanism. Module F is an invention that can be reinforced without increasing weight. Module G is an invention that dramatically improves storage and weight reduction and reduces the number of parts. Module H provides a frame that can realize a revolutionary weight reduction of the frame.

  In module A, the brake is preferably a coaster brake. For the front wheel brake, install a brake lever on the handle on the pull-out side. The brake lever cable is joined to module C. Also, a cross-section material that does not rotate the shaft is used in order to prevent the storage handle arm from rotating in the axis and facilitate the restoring operation.

  In the module B, the telescopic part of the control shaft has a cross section, and the relationship between the two materials is a shape that freely slides in the axial direction and has a function of interlocking with the shaft rotation. A form in which a sliding bearing is attached to either end of the two materials.

  In module C, there are usually two units, and the part that fixes the mutual rotation of the case is hooked on the contact part of the case to function. Generally, it is desirable to fix it near the hinge of the frame to be folded.

  In module D, the hinge connecting the control axis is swiveling in the travel axis plane, and the center of the pin coincides with the control axis. If the handle-side hinge is rotated only backward, the middle hinges forward, and the wheel-side hinge rotates rearward, so that a preferable initial operation can be obtained during storage.

  In module E, a relatively large force acts on the driving torque. Therefore, a considerable strength is required for the lock mechanism for storing and rotating the pedal. It is desirable that the crank member has a square cross section, and the pedal bearing portion has a square shape in accordance with the crank cross section. The fixing portion for preventing the rotation of the pedal is a rectangular tube and is inserted so as to cover both the crank and the end of the pedal. The lock mechanism is a method in which the crank is frictionally fixed by rotating the lever.

  In the module F, the cable method has a good storage property and a reinforcing effect.

  In module G, a simpler structure is possible if the axle is made airtight and tubeless tires are used.

  When a plurality of pneumatic units are used in the module H, a partition effect is created inside the frame, and the bending strength is further increased.

  FIG. 1 shows a core type basic frame and module groups A to H in the present invention. 1 to 4 are main frames, and X is a storage core assembled with the frame at the center. 2 and 3 are explanatory diagrams of situations in which the basic frame is folded.

  2 and 3, when x6 is removed, the frames 1 and 2 are bent by pins x4 and x5 in parallel with the frames 3 and 4, respectively, and the joint plates x2 and x3 are opened at 180 degrees about the vertical pin x1. All frames can be stored almost in parallel.

  4, 5 and 6 are examples of module A. FIG. A cutout a71 is provided in each of the arm a1 and the arm a2, a screw is cut on one side, a pin is joined with an assembly bolt a72, and the arm is inserted into the arm storage pipe a3. Further, a storage stopper a4 is attached to the arm a2 so that the traveling form can be determined, and is fastened and fixed by the handle fixing part a6.

  When the tightening operation part a6 is provided with a notch part a32 in a3, the mounting material a61 is mounted, and the lock lever a63 is rotated by the mounting shaft a62, the end part of a63 passes through a32 and hits a1, and tightening by friction becomes possible. During storage, the arm can be bent at the joint a7 (FIG. 4) by loosening the handle a63 and pulling out a2.

  A brake lever a01 for the front wheel can be mounted on the a2 side (FIG. 5). In this case, it is necessary to fix the shaft rotation of the handle. Sliding groove a11 (FIG. 5) is provided in a1, and projection part a31 is provided in a3.

  Examples of the module B are as shown in FIGS. The telescopic control shaft b3 is fixed to the upper control shaft b1 and the bearing b21 fitted to the lower control shaft b2 is configured so that b3 slides in the axial direction and b2 rotates together. A steering shaft fixing part b5 is rotatably fitted to the front pipe b4, a cut b51 is applied to the end part, and b1 is inserted therein.

  A fixing ring b52 is mounted so as to cover b51, and an opening b55 (FIG. 8) is provided in a part of the ring. When the lock lever b53 is rotated, the interval between b55 is reduced due to the eccentric effect of the rotating shaft, and b1 is tightened and fixed. As a result, when the handle is turned, b1 and b5 rotate freely, and the wheels turn in conjunction with b3 to b2. Further, in order to attach the stopper b31 so that the handle does not inadvertently come off upward, the mounting holes b22 and b42 are provided in advance.

  An embodiment of module C will be described with reference to FIGS. The core cable c1 of the exterior cable c2 such as a brake is connected to the cable operating force transmission member c3, and the interlocking turning part c4 can be rotated according to the pulling force of c1, and c4 is tightly connected to the rotating shaft c6. The whole is covered with a case to form one unit. By combining another unit that shares c6, it becomes possible to deflect the pulling force of the cable at an acute angle with the other unit.

  In general, the module C is used by being attached to a frame or the like, but when used at the free end, the unit connecting material c8 is fixed to the mutual case with fixing bolts c81 to measure stability.

  Examples of module D are shown in FIGS. FIG. 13 shows the traveling type, and FIGS. 14 and 15 show the storage type. The three pins provided on the control shafts d1 and d2 are on the axis, and the handle side joint d3 is restricted to the rear, the intermediate joint d4 is forward, and the wheel side joint d5 is restricted to the rear. With the added structure, the initial operation of folding automatically becomes the preferred form. d2 has two shapes so as not to contact the frames 1 and B. The entire end is pin-joined to B and the rear wheel side front pipe d31 to transmit only the rotational force of the handle to the wheel. The feature of the present invention is based on the premise that the main frame maintains a sufficient strength at the core portion X.

  Examples of the module E are as shown in FIGS. A pedal attachment shaft e1 is provided at the end of the crank e01, and an attachment member e2 provided on the pedal shaft e02 is inserted therein and fixed with a drop-off prevention nut e3. As a result, e02 can freely rotate about e1. The pedal shaft rotation prevention metal fitting e4 that has been passed through e01 in advance can run in a situation where it is applied to both e01 and e2, and can be stored in the drive rotation surface of e01 by removing it upward from e2.

  During driving, the lock operation part e51 of the pedal shaft lock part e5 prevents the e4 from coming off from the e2 by the action of the spring, and e02 stably transmits the pedal force to the crank no matter how the load from the crank pedal works. I can do it. To store the pedal, e51 is pushed in and e4 is removed from e2.

  Examples of the module F are as shown in FIGS. A mechanism capable of reinforcing and storing the frames 3 and 4 is provided. 4, the storage drum fixed shaft f2, the reinforcing cable f3, and the cable storage drum f4, which are attached to the joint portions f1 and 3, respectively. f3 is mounted so as to be wound around the cable storage wheel, and f42 has a structure that freely rotates around f2. When the frames 3 and 4 are opened in the running state, the f3 is tensioned with the f1 and f2 as fulcrums and serves as a reinforcing material. When the frame is stored, the coil spring f43 rotates the f42 so that the f3 is automatically wound.

  Examples of the module G are as shown in FIGS. It comprises an axle g1 with a bearing, a pneumatic tire g2, and a tightening side plate g3. The axle g1 has a side plate g11 that allows g2 and g21 to pass therethrough and g3 can be fastened and fixed by a tightening nut g31. G11 can be provided with a valve perforation g12 to open the valve g23 of the tube g21. g11 and g3 have a portion that fits into the side wall projection g22 of g2 to improve the strength. In the case of a tubeless Taya, it can be used similarly.

  An embodiment of the module H is as shown in FIG. A filling unit h2 for holding air pressure is inserted into the tubular frame h1, and the end of h1 is sealed with h11 to reduce the weight and weight.

  In the module A, when the front wheel brake lever a01 is mounted, the a1, a2, and a3 may have a cross section that does not rotate on the axis, such as a square, as shown in FIG.

  In FIG. 10 of module B, there is provided a portion b3 in which b1 and b2 slide freely and the shaft rotation is interlocked, and the portions where the ends of b1 and b2 are cut out from each other are correlated. A structure in which a slide bearing b11 is mounted on the outer periphery of the end of b1. In order to attach the stopper b21 of b1 to b2, a perforation b42 is provided in advance.

  No module C example.

  No module D example.

  FIG. 18 of the module E is an embodiment of a pedal locking mechanism. The rotating portion of the lever e51 that locks e4 has a structure in which friction between the rotating shaft portions of e01 and e51 works strongly due to the eccentric function of the rotating shaft, and when e51 is rotated upward, the frictional resistance is released and it can slide upward. Can be stored in the rotating surface of the crank.

  An embodiment of the module F is as shown in FIG. A structure in which the frame is reinforced by a tension member that can be stored in three dimensions by being fixed to the frames 3 and 4 at the frame joints f1 and f2 and connected at the reinforcing members f5 and f6 by the vertical rotation pin joints f7 and the horizontal rotation pin joints f8. .

  No embodiment of module G.

  No example of module H.

  Module A provides a simple storage method and an appropriate size for folding. Since the manufacturing method is also simple, it is expected to be widely used as a handle storage method.

  Module B has a simpler and smoother storage operation than the folding method, and has excellent design and improved utility value.

  Module C is an invention based on an unprecedented unique idea, and it can remarkably improve the storability of the inner cable of a folding bicycle and has a very high utility value.

  Module D has a background of interest in the X-type frame, and its utility value is extremely high as a method of improving reliability over cable steering.

  Module E is the first invention that can store pedals, which has been one of the problems of folding bicycles, in an unprecedented and unique way, and is considered to replace the conventional complicated pedal folding method.

  Module F reasonably improves the rigidity of the X-type frame in the core type folding. The core type folding bicycle is the most excellent product as a bicycle that can be carried. By applying the present invention, a highly reliable frame is possible, and it can contribute to solving bicycle parking problems such as abandoned bicycles.

  The module G can provide a small-diameter tire with a relatively large amount of air. The air volume improves the maintenance and performance of tires, and the number of parts is small, so it is highly marketable.

  Module H provides a new structure with a light and strong frame. A high-performance folding bicycle that can be carried in the future in a frame using carbon fiber or nanocarbon is made possible.

It is explanatory drawing which showed the basic frame of the folding bicycle. (Common to all examples) It is explanatory drawing of the folding condition of a basic frame. (Common to all examples) Same as above It is a whole explanatory view of the handle part module A. (Common to all examples) FIG. 3 is a structure explanatory diagram of a module A. (Example 1) It is sectional drawing and a perspective view same as the above. (Example 1) FIG. 3 is a structure explanatory diagram of a module A. (Example 2) FIG. 5 is an overview explanatory diagram of a handle shaft storage module B. (Common to all examples) FIG. (Example 1) It is structure explanatory drawing same as the above. (Example 2) Explanatory drawing of the cable deflection | deviation unit module C. FIG. (Example 1) Same as above. (Example 1) It is a whole explanatory view of the folding control axis module D. (Example 1) It is a side view of the folding state of module D. (Example 1) FIG. (Example 1) 4 is a structural explanatory diagram of a storage pedal module E. FIG. (Example 1) It is a lock and storage explanatory view of module E. (Example 1) It is an explanatory diagram of a locking method of the module E. (Example 2) FIG. 3 is an overall explanatory view of a frame reinforcing module F. (Example 1) It is detailed explanatory drawing same as the above. (Example 1) Same as above (Example 2) FIG. 3 is an explanatory diagram of a small-diameter tire module G. (Example 1) FIG. (Example 1) Exploded view same as above. (Example 1) 4 is a cross-sectional explanatory view of a frame module H. FIG. (Example 1)

Explanation of symbols

1 Handle side frame 2 Saddle side frame 3 Front wheel side frame 4 Rear wheel side frame X Basic frame core module x1 Folding core vertical axis pin x2 Frame 3 joint plate x3 Frame 4 joint plate
x4 Frame 1, 3 joint pin x5 Frame 2, 4 joint pin x6 Core lock part A Handle module B Telescopic control shaft module C Cable deflection module D Folding control module E Storage pedal module F Frame reinforcement module G Small-diameter tire module H Light weight frame Module a01 Front wheel brake lever a1 Left handle arm a11 Arm sliding groove a2 Right handle arm a3 Arm storage pipe a31 Shaft rotation prevention projection a32 Arm storage pipe notch
a4 Storage stopper a5 Steering shaft a6 Handle fixing part a61 Fixing part mounting material a62 Lock lever mounting shaft a63 Lock lever a64 Arm storage pipe notch part a7 Handle arm hinge a71 Arm notch part a72 Arm hinge assembly bolt
b1 Upper control axis
b2 Lower control shaft
b22 Mounting hole
b21 Sliding and interlocking rotary bearing
b3 Telescopic control shaft
b31 Telescopic shaft stopper
b4 Handle side front pipe
b41 Control shaft lower bearing
b42 mounting holes
b5 Steering shaft fixing part
b51 Tightening part notch
b52 Steering shaft fixing ring
b53 Control axis lock lever
b54 Steering shaft fixed bearing
b55 b52 opening
c1 core cable
c2 exterior cable
c3 Cable operating force transmission material
c4 Interlocking rotating part
c5 Core cable and cable operating force transmission material joint
c6 Interlocking rotary shaft
c7 Unit cover
c8 Unit connecting material
c81 Unit fixing bolt M Connection unit
d1 Upper control shaft
d2 Lower control shaft
d3 Handle side joint
d31 Front wheel side front pipe
d4 Intermediate joint
d5 Wheel side joint e01 Drive part crank e02 Pedal shaft e1 Pedal mounting shaft
e2 Pedal attachment material e3 Pedal drop-off prevention nut
e4 Pedal shaft rotation prevention bracket e5 Pedal shaft lock part e51 Same lock operation part (including examples of spring and lever)
f1 Frame joint
f2 Cable storage drum fixed shaft
f3 Frame reinforcement cable
f4 Cable storage drum
f41 In-drum cable pin joint
f42 cable storage wheel
f43 Cable winding coil spring
f5 Rear reinforcement
f6 Front reinforcement
f7 Vertical rotating pin joint
f8 Horizontal rotating pin joint g1 Axle g11 Side plate g12 Valve drilling g2 Pneumatic tire
g21 Tube g22 Tire side projection g23 Valve g3 Tightening side plate
g31 Tightening nut
h1 frame material
h11 End reinforcement
h2 Pneumatic holding unit

Claims (8)

      A folding bicycle that features a frame that is filled with a hollow unit that holds air pressure and has increased strength.       2. The folding bicycle according to claim 1, wherein the front frame and the rear frame are reinforced by connecting the connecting frame with a pulling material capable of freely changing the shape.       The control frame includes an upper control shaft 1, a lower control shaft 2, a control shaft intermediate expansion / contraction part 3, an exterior pipe 4, and a control shaft expansion / contraction adjustment fixing operation part 5. Even if it expands and contracts along the axis, the steering swivel movement has a section that can be interlocked with 2 and is stored in 4, 5 has a function that can be swiveled to 4 and 1 can be fixed and released, and the steering shaft can be freely moved. The folding bicycle according to claim 1, wherein the folding bicycle can be adjusted.       The steering shaft has a pin joint on each of the steering wheel side 1, middle 2 and front wheel side 3, and the steering shaft is folded and stored at the joint in the mechanism for folding the steering wheel in the direction of the front wheel. The folding bicycle according to claim 1 or 2 characterized by the above-mentioned.       The left and right handle arms 1 and 2 are pin-joined in the middle, and the joint 3 is inserted into a horizontal pipe 4 fixed to the control shaft and can be fixed by a fixed operation part. The folding bicycle according to claim 1 or 2, further comprising a handle storage mechanism that can be folded at the joint 3 exposed and pulled out.       This is an operation cable whose outer surface is covered with an elastic material. A power transmission material is attached to the outer periphery of the rotating disk fixed to the rotating shaft, and an external control cable is connected to the end of the operation cable. A mechanism that allows the rotating disk to rotate with a power transmission material as a single unit, and to combine two units that share the rotating axis of the rotating disk and interlock with each other, so that the axial force direction of the cable can be deflected at an acute angle The folding bicycle according to claim 1, further comprising a cable operating mechanism.       In the driving part of the bicycle, a rotating shaft 2 that is coaxial with the material shaft is provided at the tip of the crank 1, and the pedal shaft 3 is mounted on a structure that can rotate about the shaft 2 and does not fall off. Equipped with a fixed part 4 and has a lock mechanism so that the hook of 4 will not come off during traveling, release the hook of 4 at the time of storage, rotate 3 on two axes, and store the pedal in the rotation surface of the crank The folding bicycle according to claim 1 or 2, wherein a pedal storage mechanism is provided. The wheel according to claim 1, further comprising a wheel having a structure in which a side plate is attached to an axle passing through the tire 1 and a detachable side plate is fixed to the opposite side by a tightening nut sharing the axle with the axle. Folding bike.