JP4435596B2 - Bicycle part folding structure and bicycle folding structure using the same - Google Patents

Description

The present invention relates to a folding structure of a bicycle part configured to be foldable using a hinge mechanism and a folding structure of a bicycle using the same .

Many types of folding structures for bicycles and bicycle parts have been proposed and used in the past so that the vehicle body and parts can be folded compactly for transportation and storage when the bicycle is not in use. In addition to the configuration that stores the front and rear wheels in a compact manner by folding and folding a part of the car body and overlapping the front and rear wheels, the middle part of the handle post is designed to shorten the height of the handle post. There has been proposed a folding bicycle that is configured to be bent by a hinge shaft (see, for example, Patent Documents 1 and 2 below).
Utility model registration No. 2529591 (refer to claim 1) Utility model registration No. 3062974 (see claim 1)

  These conventional examples will be described in order. As shown in FIG. 5, the first conventional example disclosed in Patent Document 1 includes an upper flange 138 connected to the upper bar body 113 at the lower end of the handle post and a front flange. A lower flange 133 connected to the lower rod body 114 at the upper end of the hawk is pivotally supported by a pair of pivots 116 and 117 by the pivot holes 125 and 126 and 127 and 128. Simultaneously with the pivots 116 and 117, through holes 123 and 124 above the end of the presser bar 118 are pivotally supported. On the other hand, the male screw 136 at the front end of the screw 119 is screwed into the screw hole 131 of the pivot 130 pivotally supported by the through holes 121 and 122 below the end of the presser bar 118. A U-shaped element 120 is disposed at the rear end of the screw 119, and is configured to maintain the overlapping state of the upper flange 138 and the lower flange 133.

  With such a configuration, by loosening the screw 119 and retracting the U-shaped element 120, the upper flange 138 and the lower flange 133 are released from the overlapping state, and the upper bar on the handle post side with respect to the lower bar body 114 is released. The body 113 can be bent and folded. Next, in order to assemble the upper rod body 113 for running the bicycle, the upper flange 138 and the lower flange 133 are superposed and the screw 119 is screwed to the pivot 130 to advance the U-shaped element 120. The upper flange 138 and the lower flange 133 are held together. From this state, the presser bar 118 is swung upwards around the pivots 116 and 117 to move the pivot 130 upward while pulling the screw 119, and the screw 119 exceeds the dead point of the pivots 116 and 117. The superposition state of the upper flange 138 and the lower flange 133 can be maintained firmly and reliably.

  As shown in FIG. 6, the second conventional example disclosed in Patent Document 2 is such that one end of the upper stopper 211 and the lower stopper 212 attached to both ends of the folding portion of the bicycle is connected to the rotating shaft 213. The upper stopper 211 and the lower stopper 212 are respectively connected to each other by hinges to form a tooth-like stopper 216. A fixing ring 217 is provided inside the upper stopper 211 or the lower stopper 212, and the tip of the fixing knob 215 is screwed into the screw hole of the fixing ring 217. A stopper 214 inserted in the shaft portion of the fixed knob 215 is disposed in such a manner that the meshing portion of the tooth-like stopper 216 of the upper stopper portion 211 and the lower stopper portion 212 is sandwiched.

  With such a configuration, when the tooth-like stopper 216 at the opening end portion of the upper stopper portion 211 and the lower stopper portion 212 are combined, the folding structure is reinforced with a simple structure by crossing and closely contacting the stopper 214. As a result, maintenance is easy and reliable use can be maintained, which is safer and has a longer service life, which is advantageous for mass production.

  However, in these conventional folding structures, in the first conventional example of FIG. 5, the pivots 116 and 117 that pivotally support the upper flange 138 and the lower flange 133 are separated by the presence of the pivot 130. In addition to lowering the support strength, it requires a large number of pivots and becomes a complicated structure. The existence of a large number of pivots increases the probability of backlash occurring in the shaft, and also increases the amount of backlash correction, which is troublesome and cumbersome. Further, in the second conventional example of FIG. 6, it is necessary to provide the fixing ring 217 inside the lower stopper 212 and the like, so the structure is complicated and the molding is troublesome. Further, when a backlash occurs on the rotating shaft 213, it cannot be corrected. Furthermore, in any of the above-described conventional examples, there is a risk that they will fall off due to excessive loosening of the screw 119 or the fixed knob 215.

The present invention is to solve the various problems of the conventional folding structure, high strength of the hinge portion by a simple structure, backlash correction is easy, folding no fear of falling off of the gripping member bicycle component structure And it aims at providing the folding structure of a bicycle using the same .

Therefore the present invention is a hinged to foldably constructed folding structure of bicycle part article by a hinge shaft opposing fixing seat, with locking one end of the fixing pin to the hinge axis, on the other end , Loosely fitting a fixing piece for fixing the superposed fixing seat, and screwing a knob member for moving the fixing piece in the axial direction of the fixing pin from the outside to rotate the knob member Thus, it is possible to fix or release the superposed fixing seat by the fixing piece. Further, the present invention is characterized in that a stopper member for preventing the dropping of the knob member is disposed outside the knob member screwed into the fixing pin. Further, the present invention is characterized in that a fixing pin receiving groove for receiving the fixing pin is formed on an opposing surface of the opposing fixing seat. Further, the present invention provides a bicycle folding structure in which a fixed seat is hinged with a hinge shaft so that it can be folded, and one end of a fixing pin is locked to the hinge shaft, and the other end is superposed and fixed. By loosely fitting a fixing piece for fixing the seat, and screwing a knob member for moving the fixing piece from the outside in the axial direction of the fixing pin, and rotating the knob member, It is characterized in that it is possible to fix or release the fixed seat that is overlapped by the fixing piece. Further, the present invention is characterized in that a stopper member for preventing the dropping of the knob member is disposed outside the knob member screwed into the fixing pin. Further, the present invention is characterized in that a fixing pin receiving groove for receiving the fixing pin is formed on the opposing surface of the opposing fixed seat , and these are used as means for solving the problem.

According to the present invention, in the folding structure of a bicycle part that is configured to be foldable by hinged to the opposite fixed seat by the hinge shaft, one end of the fixing pin is locked to the hinge shaft, and the other end is overlapped. Loosely fitting a fixing piece for fixing the fixed seat, and screwing a knob member for moving the fixing piece in the axial direction of the fixing pin from the outside to rotate the knob member. As a result, it is possible to fix or release the fixed seat that is overlapped by the fixing piece. Can be high. Moreover, since the knob member is rotated and tightened every time the assembling work is performed, the hinge shaft is pulled by the fixing pin and the play of the hinge shaft is automatically corrected. In the unlikely event, the play that occurs during use can be easily and easily adjusted by pulling the fixing pin by adjusting the knob member via the fixing piece.

Further, when a stopper member for preventing the dropping of the knob member is provided outside the knob member screwed to the fixing pin, the knob member is loosened too much to open the fixing piece in order to fold the vehicle body. However, there is no possibility that the knob member is regulated by the stopper member and dropped from the outer end portion of the fixing pin and lost. Further, when a fixing pin receiving groove for receiving the fixing pin is formed on the opposing surface of the opposing fixing seat, the fixing pin is aligned with the fixing pin receiving groove and stored, so that the fixing pin Can function as a guide to the accommodation groove, and the opposing fixed seats in the folded portion can be polymerized without being shaken.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of a folding structure of a bicycle part and a folding structure of a bicycle using the same according to the present invention, FIG. 1 is a perspective view of the folding portion in an open state, and FIG. 2 is a folding portion. FIG. 3 is an exploded perspective view of the folding portion, and FIG. 4 is a perspective view showing an example in which the folding portion is applied to the handle post. As shown in FIG. 1, the basic structure of the folding structure of a bicycle part and the folding structure of a bicycle using the same according to the present invention is such that the fixed seats 8 and 9 are hinged by a hinge shaft 13 and can be folded. loosely fitted in the structure and folding structure of the bicycle portion products, as well as locking the one end of the fixing pin 12 to the hinge shaft 13, at its other end, a fixing piece 14 for fixing the fixing seat 8,9 polymerized In addition, a fixing member 14 for moving the fixing piece 14 in the axial direction of the fixing pin 12 from the outside is screwed, and the picking member 15 is rotated, whereby the fixing piece 14 is overlapped. The seats 8 and 9 can be fixed or released.

  This will be described in detail below. As shown in FIG. 4, the folding part 6 of the present invention is preferably applied to a handle post 1 of a two-wheeled vehicle such as a bicycle. However, not only the folding part of the handle post. The present invention can also be applied to folding other appropriate vehicle bodies and parts. The handle post 1 with the handle bar 7 horizontally mounted on the upper end portion is divided into an upper handle post 1A and a lower handle post 1B, and a folding portion 6 is formed in these divided portions. The folding direction of the folding section 6 is 45 ° with respect to the longitudinal direction of the vehicle body. When the upper handle post 1A and the lower handle post 1B are stored in parallel when folded, the handle bar 7 is made to coincide with the longitudinal direction of the vehicle body. Configured to be folded. The lower handle post 1 </ b> B is connected to the upper end 3 </ b> A of the front fork 3 that pivotally supports the front wheel 4. The upper part of the front fork 3 is pivotally supported in the head tube 2 at the front end of the main pipe 5.

  As shown in the exploded view of FIG. 3, the upper fixed seat 8 is fixed to the lower end portion of the upper handle post 1A, and the lower fixed seat 9 is fixed to the upper end portion of the lower handle post 1B. A pair of hinge portions 8A and 8B are formed at the base portion of the upper fixed seat 8, and a pair of hinge portions 9A and 9B are also formed at the base portion of the lower fixed seat 9. A hinge shaft 13 is inserted through these hinge portions and is prevented from being removed by a horseshoe clip 20. At that time, the hinge shaft attachment end 12 </ b> A at the other end of the fixing pin 12 is locked to the hinge shaft 13. Preferably, the hinge shaft 13 is inserted into a hinge shaft hole 12C formed in the hinge shaft attachment end 12A at the other end of the fixing pin 12, as in the illustrated example.

  A screw portion 12B is engraved at one end of the fixing pin 12, and a fixing piece 14 having a U-shaped cross section having a tapered groove 14A and a washer 19 are loosely fitted to the fixing pin 12 through a spring 18 in order. Furthermore, a knob member 15 made of plastic or light metal is screwed and inserted. A hard steel member 17 perpendicular to the fixing pin 12 is embedded in the soft knob member 15, and a screw portion 12 B of the fixing pin 12 is screwed into a screw hole 17 A formed in the steel member 17. . A stopper nut 16, which is a stopper member, is screwed into the screw portion 12 </ b> B of the fixing pin 12 positioned outside the knob member 15, so that the knob member 15 is not loosened from the outer end portion of the fixing pin. Prevent falling out.

  On the other hand, fixed pin receiving grooves 10 and 11 are formed on the opposing surfaces of the upper fixed seat 8 and the lower fixed seat 9, and the fixed pins 12 are stored in alignment with the fixed pin receiving grooves 10 and 11. Thus, when assembling the handle post 1 and the like, the fixing pin 12 functions as a guide to the receiving grooves 10 and 11, and the opposing fixing seats in the folding portion are smoothly and stably polymerized without being shaken. Can be assembled. Further, the raised surfaces 8C, 8D and 9C, 9D are formed on the opposite end of the hinge shaft 13 without making the opposing surfaces of the fixed seats 8, 9 uniform, and these raised surfaces 8C, By configuring so that 8D, 9C, and 9D are in contact with each other, it is possible to increase the polymerization strength and accuracy of the fixing seats 8 and 9 even with low surface accuracy.

  Such a configuration causes the state shown in FIG. 1, that is, the state in which the knob member 15 screwed to the fixing pin 12 is loosened and the upper handle post 1 </ b> A is folded, and the hinge shaft 13 is pivoted as shown in FIG. 2. As described above, the upper fixed seat 8 at the lower end of the upper handle post 1A and the lower fixed seat 9 at the upper end of the lower handle post 1B are overlapped so that the handle posts 1A and 1B are erected in a straight line. At this time, the fixing pin 12 is smoothly accommodated in the fixing pin accommodating grooves 10 and 11 of the respective fixing seats 8 and 9 and is stably polymerized and assembled without being shaken. Next, when the knob member 15 is tightened, the taper groove 14A of the fixed piece 14 firmly connects the upper fixed seat 8 and the lower fixed seat 9 together, and the handle post 1 can be maintained upright in the use state. It becomes possible. An inclined portion that coincides with the inclination of the tapered groove 14 </ b> A of the fixed piece 14 is formed at the contact portion between the upper fixed seat 8 and the fixed piece 14 of the lower fixed seat 9.

  As described above, the embodiments of the present invention have been described. Within the scope of the present invention, the portion where the folding portion is formed (handle post, main pipe, handle bar, etc.), the shape and type of the hinge shaft (solid) Pin, hollow pin, etc.), shape of fixed piece (U-shaped section with tapered groove, U-shaped section with thickness of upper and lower fixed seat without taper), type and material (light metal, plastic, steel, etc.), shape of knob , Type and related structure with fixed piece (contact surface may be subjected to wear-resistant treatment) and material (light metal, plastic, etc.), fixed pin shape (cross-sectional shape other than screw part as square or polygon) The hinge shaft may be press-fitted into a semicircular arc-shaped locking portion, and the hinge may be locked to the other end of the fixing pin. Insert the shaft), the shape of the stopper member , Type (preferably a cap nut, but other loose nuts and installation of horseshoe-shaped clips, etc.) and related configuration with the knob (the stopper nut is loosened with the knob as in the embodiment) Sometimes it may be embedded in the end face of the knob member), the shape of the fixed seat including the shape of the hinge portion (in addition to the hinge portion as in the embodiment, a plurality of hinge portions may be opposed in a staggered manner). Further, the form and the form of fixing to the vehicle body or parts (welding, screwing, integral molding, etc.), and the related configuration with the hinge shaft (the fitting with one of the upper and lower fixed seats of the hinge shaft may be a non-rotatable square shape, etc. Further, the locking between the fixing pin and the hinge shaft may also be a non-rotatable rectangular fitting), and the fixing including a fixing pin receiving groove forming form (not limited to a square cross section but may be an arc-shaped cross section). The shape of the opposite surface of the seat It may be appropriately selected for forming position, etc.) or the like parts.

1 shows one embodiment of a folding bicycle according to the present invention, and is a perspective view of a folded portion in an open state. FIG. It is a perspective view of the use state of a folding part. It is an exploded perspective view of a folding part. It is a perspective view which shows the example in which the folding part was applied to the handle post similarly. It is a bicycle handle folding structure figure showing the 1st conventional example. It is the folding structure figure of the bicycle which shows the 2nd prior art example.

Explanation of symbols

1 Handle post (car body)
1A Upper handle post 1B Lower handle post 2 Head tube 3 Front hawk 3A Hawk upper end 4 Front wheel 5 Main pipe 6 Folding part 7 Handlebar 8 Upper fixed seat 8A Hinge part 8B Hinge part 8C Raised surface 8D Raised surface 9 Lower fixed seat 9A Hinge portion 9B Hinge portion 9C Raised surface 9D Raised surface 10 Fixed pin accommodating groove 11 Fixed pin accommodating groove 12 Fixed pin 12A Hinge shaft mounting end 12B Screw portion 12C Hinge shaft hole 13 Hinge shaft 14 Fixing piece 14A Taper groove 15 Picking member 16 Stopper Nut (stopper member)
17 Steel piece 17A Screw hole 18 Spring 19 Washer 20 Horseshoe clip

Claims (6)

In hinged to foldably constructed folding structure of bicycle part article by a hinge shaft opposing fixing seat, with locking one end of the fixing pin to the hinge axis, on the other end, it polymerized the fixing seat A fixing piece for fixing is fixed by loosely fitting a fixing piece for fixing, and screwing a knob member for moving the fixing piece in the axial direction of the fixing pin from the outside, and rotating the knob member. folding the bicycle part products, characterized in that the fixed or released stationary fixed seat that is polymerizable to configure by. The outer knob member screwed to the fixing pin, folding the bicycle part article according to claim 1, characterized in that it disposed a stopper member for drop-off prevention of該摘seen member. Wherein the facing surface of the opposite fixing seat, folding the bicycle part article according to claim 1 or 2, characterized in that the formation of the fixing pin receiving groove for accommodating the fixing pin. In a folding structure of a bicycle that is configured to be foldable by hinged to opposite fixed seats by a hinge shaft, one end of a fixing pin is locked to the hinge shaft, and the overlapped fixed seat is fixed to the other end portion. The fixing piece is loosely fitted, and a knob member for moving the fixing piece in the axial direction of the fixing pin from the outside is screwed, and the knob member is rotated, thereby being superposed by the fixing piece. Bicycle folding structure characterized in that the fixed seat can be fixed or released. The bicycle folding structure according to claim 4, wherein a stopper member for preventing the knob member from falling off is disposed outside the knob member screwed onto the fixing pin. 6. The folding structure for a bicycle according to claim 4 or 5, wherein a fixing pin receiving groove for receiving the fixing pin is formed on an opposing surface of the opposing fixing seat.

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