JP2018047881A - Auxiliary wheel for carrying folded foldable bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an object of fitting an auxiliary wheel for carrying a bicycle to the foldable bicycle without impairing design property, with a minimum number of components, without impairing simple fold-ability and light-weight.SOLUTION: An auxiliary wheel 17 is fixed to a starting end 19 of a thumb screw moving hole for a stay 16, with a thumb screw 20. Then, a rotary shaft 12 is inserted into a stay rotary shaft hole 13 of the stay 16 and a front-and-rear-frames-connection pivot 4, to fix the stay 16. The rotary shaft 12 is provided with a step, a size of which includes: a size of a clearance allowing the stay 16 operable even when the rotary shaft 12 is bound; and a thickness of the stay 16. Since a rotation angle of the stay 16 is smaller than a rotation angle of a rear frame 3, the stay 16 is provided with a stay hooking screw idle running hole 15, while the rear frame 3 is provided with a stay rotation stop screw idle running groove 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an auxiliary wheel for traveling in a folding bicycle.

  There are two methods for carrying a bicycle without lifting a folding bicycle: a method using a bicycle's original wheel and a method using a bicycle auxiliary wheel.

  The method of using the original bicycle wheel requires that the front wheel and the rear wheel be folded in parallel, and the folding method is not limited because there are many restrictions on the folding method. If you try to fold it compactly, it will become more complicated and the weight will increase, reducing the attractiveness of the simple structure and mobility of the bicycle by half.

  In the method of using the auxiliary wheel for wheeling, it is difficult to directly attach the auxiliary wheel for wheeling to the bicycle to a position where it does not interfere with traveling and touches when folded. Therefore, it may be attached via a cargo bed etc., but the cargo bed is bulky, increases in weight, impairs design, and has disadvantages that are not suitable for sports cars.

  There is also a method of attaching the auxiliary wheel for wheeling to the wheel bag without attaching it to the bicycle. However, if the wheel bag does not have a certain strength, the auxiliary wheel for wheeling becomes loose and does not function. There is a disadvantage that it is necessary to increase the strength of the bag, the cloth becomes thick and bulky, and it becomes troublesome to carry the wheel bag.

  The problem to be solved is that when the auxiliary bicycle wheel is attached to the folding bicycle, the weight increases and the design is impaired.

  The main feature of the present invention is that the auxiliary wheel for wheeling is retractable, protrudes with the operation of folding the bicycle, and is stored with the operation of assembling the bicycle.

  The retractable auxiliary wheel for storage according to the present invention has an advantage that when stored, it is hidden behind the chain ring, does not impair the design, and does not interfere with traveling.

It is a right view of the folding bicycle equipped with the device of the present invention. It is an enlarged surface view of the rear frame of the device of the present invention and a folding bicycle. It is the right view which inverted the folding bicycle which this invention apparatus protruded 90 degree | times. It is a right view of the folding bicycle parked using the stopper of this invention apparatus.

  The purpose of attaching the auxiliary wheel for a bicycle to a folding bicycle without impairing the design was realized with the minimum number of parts and without compromising the simplicity and lightness of the folding method.

  1 and 2 are right side views of a folding bicycle equipped with the device of the present invention and with the chain ring omitted so that the device of the present invention can be easily seen. FIGS. 3 and 4 show an embodiment of the device of the present invention. FIG. 1 to 22 are the same in all the drawings.

  The auxiliary wheel 17 is fixed to the starting end 19 of the thumb screw moving hole 19 of the stay 16 with the thumb screw 20, and the stay 16 is mounted through the rotating shaft 12 to the stay rotating shaft hole 13 of the stay 16 and the front and rear frame connecting pivot 4. Then, a step is provided on the rotary shaft 12 with a clearance that allows the stay 16 to operate even if the rotary shaft 12 is tightened to the same thickness as the stay 16. Further, since the rotation angle of the stay 16 is smaller than the rotation angle of the rear frame 3, the stay hooking screw 15 is provided on the stay 16, and the stay rotation stopping screw idle running groove 6 is provided in the rear frame 3.

  When the bicycle is folded, the stay hook screw 9 attached to the rear frame 3 with the rotation of the rear frame 3 runs idle along the stay hook screw empty running hole 15 of the stay 16, and the stay hook screw empty of the stay hook screw empty running hole 15. The stay 16 is hooked at the end 14 of the running hole, and the stay 16 is pushed out. The stay rotation stop screw 7 attached to the stay 16 runs idle in the stay rotation stop screw idle running groove 6 dug in the rear frame 3, and the stay rotation stop screw idle running groove 6 of the stay rotation stop screw idle running groove end 5 It is caught and stopped so that the stay 16 does not rotate too much. Then, when the bicycle folded with the wheel caster 1 as a fulcrum is tilted 90 degrees backward, the pair of left and right wheel casters 1 are grounded, and the bicycle folded with a total of three wheels with the auxiliary wheel 17 becomes independent.

  When the bicycle is assembled, the stay hooking screw 9 attached to the rear frame 3 is idled along the stay hooking screw idle running hole 15 as the rear frame 3 rotates, and the stay hooking screw empty running hole 15 stay hooking screw empty running hole starting end 10 is assembled. Then, the stay 16 is hooked and the stay 16 is stored. The stay rotation stopping screw 7 attached to the stay 16 runs idle in the stay rotation stopping screw idle running groove 6 dug in the rear frame 3, and the stay rotation stopping screw idle running groove 6 of the stay rotation stopping screw idle running groove 6 It catches and stops so that the stay 16 does not retract too much.

  When the thumbscrew 20 is loosened while the apparatus of the present invention shown in FIG. 3 is operated and parked, the auxiliary wheel 17 moves from the thumbscrew moving hole start end 19 of the thumbscrew moving hole 21 to the butterfly screw moving hole end 22. The stopper 18 that has moved and has been subjected to anti-slip processing at the tip of the stay 16 is grounded so that the bicycle being parked cannot be moved carelessly.

  Since it is a bicycle auxiliary wheel that can be easily carried with one hand without lifting a folded bicycle that is heavy and bulky, without losing the design of the bicycle, it is easy for anyone to handle and widens the user's leeway and realizes an ecological society.

1. Wheeled caster 12． Rotating shaft Chain ring 13. Stay rotation shaft hole 3. Rear frame 14. Stay hook screw idle hole end 4. Front and rear frame connecting pivot 15. Stay hook screw empty hole 5. Stay rotation stop screw idling groove end 16. Stay 6. Stay rotation stop screw idle running groove 17. Auxiliary wheel7. Stay rotation stop screw 18. Stopper 8. Stay rotation stop screw idling groove start end 19. 8. Beginning end of thumbscrew movement hole Stay hook screw 20. Thumbscrew 10. Stay hook screw empty hole start edge 21. 10. Thumbscrew movement hole Main frame 22. Thumbscrew movement hole end

Claims (2)

  Pass the bolt through the hole on the other end of the stay with the auxiliary bicycle wheel, and pass the bolt through the pivot shaft of the pivot that connects the rear frame and front frame of the folding bicycle. Make sure that the stay with the auxiliary wheel is rotated on the same axis. Further, since the rotation angle of the stay is smaller than the rotation angle of the rear frame, the stay is provided with an idle running hole of the rear frame side projection and an idle running groove of the stay side projection on the rear frame. And the end of the idle running hole of the stay opened on the circumference around the rotation axis of the pivot that connects the rear frame and the front frame is on the circumference around the rotation axis of the pivot that connects the rear frame and the front frame. It is hooked on the protrusion of the rear frame provided at the same distance as the open hole of the opened stay, and can be pushed out and stored in conjunction with the movement of the rear frame. Also, the rear with the folding bicycle wheel support wheel is dug on the circumference centering on the pivot axis of the pivot that connects the rear frame of the folding bicycle and the front frame so that the stay does not come out too much or retract too much. It is characterized in that it stays at the end of the idle running groove of the frame by hooking the stay projection provided at the same distance as the idle running groove dug on the circumference around the rotation axis of the pivot that connects the rear frame and the front frame A retractable auxiliary wheel mechanism for folding bicycles.   If you loosen the screw that secures the folding bicycle wheel attached to the stay through the stay, the fixed position of the folding bicycle wheel will move, and the tip will be grooved. A stopper mechanism characterized in that the end of the stay of the auxiliary bicycle wheel for a folding bicycle that has been slip-prevented is grounded to prevent the folding bicycle from moving unintentionally.

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