JP2006327237A - Frame for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bicycle frame to keep an easily ridable distance between the handlebar and a saddle at an easy-to-ride distance in case it is used as an ordinary bicycle, and used as a two-wheeler vehicle, serving in the condition with the body width in a short distance to assure a high portability so that it can be carried into a tram or an automobile like a caster-fitted travel bag or a shopping cart, capable of being changed over between bicycle and two-wheeler easily, quickly, and certainly, offering a large mechanical strength, and manufacturable easily and quickly without requiring many buffer members by equipping the front and rear frames themselves with shock absorbing function, and also offering an improved comfortableness. <P>SOLUTION: The front frame 3 consisting of a handle frame 1 and a front fork 2 is formed in an arc shape concave inward. A rear frame 6 consisting of a saddle frame 4 and a rear fork 5 is formed in an arc shape concave inward. The handle frame 1 and the saddle frame 4 are installed at the front extremity and tail of the main frame 7, respectively, in such a way as rotatable horizontally. A handlebar 8 and a saddle post 9 are installed on the handle frame 1 and the saddle frame 4, respectively, with the levels adjustable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bicycle frame that can be used as an ordinary bicycle or as a two-wheeled vehicle.

Many bicycles that can be folded up are known in the past, but all of them have a large number of parts and require a great deal of labor and a long time for folding and unfolding operations.
Further, a bicycle shown in Patent Document 1 is known as one that can be used as a twin-wheel vehicle.

  Basically, a substantially vertical handle 10 frame is disposed at the front end of the main frame 7 'shown by a one-dot chain line in FIG. 7, and a substantially vertical saddle 9 frame is horizontally rotated at the rear end of the main frame 7'. It is provided freely.

  In this conventional example, the length of the main frame 7 'is set to a distance L1 that is easy to ride as a two-wheeled vehicle and used as a two-wheeled vehicle (ordinary bicycle), and the frame and saddle of the handle 10 are centered on points a and b in FIG. Nine frames are rotated horizontally at right angles and in opposite directions and used as a two-wheeled vehicle.

  For this reason, when a two-wheeled vehicle is used, the distance L1 is the vehicle body width, and the vehicle cannot be placed on a train, an automobile, or the like in this state.

In addition, the conventional bicycle including the conventional example requires many buffer members.
JP-A-8-290791

  When the present invention is used as a two-wheeled vehicle while maintaining a distance L1 that is easy to ride between the steering wheel and the saddle when used as a normal two-wheeled vehicle, the vehicle body width is used in a state of a short distance from the distance L2 in FIG. Increases portability, can be carried on trains and cars like a travel bag with a caster or a shopping cart, and changes between two-wheeled and two-wheeled vehicles can be made easily, quickly and reliably, and mechanical strength The object is to improve the ride comfort as well as to make the front and rear frames themselves bufferable so that they can be manufactured easily and quickly without the need for many buffer members.

  Furthermore, when used as a two-wheeled vehicle, it is possible to adjust the tilt of the handlebar and adjust the handlebar-saddle spacing as well as the height adjustment so that the rider's ride comfort is better, and it is also used as a two-wheeled vehicle The problem is to raise the hand grip and make it easier to carry.

  In the present invention, firstly, a front frame composed of a handle frame and a front fork is formed in an inward concave arc shape, a rear frame composed of a saddle frame and a rear fork is formed in an inward concave arc shape, The handle frame is attached to the front end, the saddle frame is horizontally attached to the rear end, a handle is provided on the handle frame, and a saddle post is provided on the saddle frame to be adjustable in height. .

  According to the second aspect of the present invention, in the first aspect of the present invention, a handle post is attached to the upper end of the handle frame so as to be adjustable in inclination in the front-rear direction.

  A third aspect of the present invention is characterized in that, in the first aspect of the present invention, a saddle post having the same curvature as the concave arc-shaped saddle frame is provided on the saddle frame so as to be detachable.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, a hand grip is attached to the main frame so as to be movable up and down.

  According to the first aspect of the present invention, when used as a normal two-wheeled vehicle, the vehicle body is used in a state where the vehicle body width is short when the two-wheeled vehicle is used while maintaining a comfortable distance between the steering wheel and the saddle. It can be carried, can be carried on a train or car like a travel bag with a caster or a shopping cart, and can be easily, quickly and reliably changed to a two-wheeled or two-wheeled vehicle. It is possible to improve the riding comfort as well as to increase the strength of the vehicle and to easily and quickly manufacture the front and rear frames themselves without providing many buffer members.

  According to the present invention of claim 2, in addition to the effect of the present invention of claim 1, when used as a two-wheeled vehicle, the inclination of the steering wheel can be adjusted, and the ride comfort of the passenger becomes better.

  According to the third aspect of the present invention, in addition to the first aspect of the present invention, not only the height adjustment but also the steering wheel saddle distance can be adjusted, and the ride comfort of the passenger can be improved.

  According to the present invention of claim 4, in addition to the present invention of claim 1, in the case of a two-wheeled vehicle, the descending hand grip can be raised to facilitate transportation.

  As shown in FIGS. 1 and 2, short tubes 70 and 71 are fixed vertically to the front and rear ends of the main frame 7 formed in the shape of an elongated plate. A boss 72 is integrally provided in the front short tube 70, and a screw hole 73 is screwed in the boss 72, and a screw hole 73 ′ is also screwed in the rear short tube 71, so that A hand grip 74 is provided parallel to the direction.

  The hand grip 74 is attached to the main frame 7 so as to be movable up and down. Specifically, as shown in FIG. 1, the main frame 7 is provided with insertion holes 74a and 74a at intervals, and the insertion holes 74a and 74a are formed in the insertion holes 74a and 74a. The U-shaped hand grip part 74 is penetrated so as to be movable up and down, and stoppers 74b and 74b are provided at the lower end of the hand grip part 74.

  The handle frame 1 and the front fork 2 are integrally formed or fixed to form a front frame 3 having a concave arc shape, specifically, an arcuate shape when viewed from the side.

  Similarly, the saddle frame 4 and the rear fork 5 are integrally formed or fixed to form an inwardly concave arc shape in side view, specifically, an arcuate rear frame 6, and screw holes 40 are formed at positions corresponding to the screw holes 73 ′. The screw holes 41 are respectively screwed in the upper part. The top portions 11 and 42 of the front frame 3 and the rear frame 6 are inserted into the short tubes 70 and 71 so as to be horizontally rotatable, the male screw 60 is fastened to the screw holes 73 ′ and 40, and the male screw 12 is fastened to the screw hole 73. Screw in halfway. When the holes of the short tubes 70 and 71 are vertical holes so that the head top parts 11 and 42 can be rotated horizontally, only the insertion part of the head top parts 11 and 42 can be formed vertically. When making 11 and 42 into a concave arc shape, the hole diameters of the short tubes 70 and 71 may be made larger than the outer diameters of the head top portions 11 and 42 with a margin.

  As shown in FIGS. 1, 3, and 4, an insertion piece 14 that is obliquely downward and has the same curvature as that of the handle frame 1 is integrally formed or fixed to the rear end of the known inclination switching block 13, and the insertion piece 14 is attached to the handle frame 1. Fits and adheres to the top opening.

  The inclination switching block 13 is connected to both sides of the central vertical hole 15 with inclined holes 16 and 17 that inwardly incline as it goes downward and outwardly (as shown in FIG. 4) as it goes downward from the center. A slit 19 is inserted in the front surface of the block 13, the inclined hole 16 is opened forward, and a screw hole 13a is screwed in a side surface of the block 13, and a male screw 13b is provided in the screw hole 13a. Screw in. The bottom opening 13 ″ of the inclination switching hole 13 ′ composed of the vertical hole 15 and the inclination holes 16 and 17 is an oval type as shown in FIG.

  In the figure, reference numeral 8 denotes a handle. A handle post 10 is integrated or fixed to the handle 8, and height adjustment holes 80, 80 ', which are formed by a plurality of screw holes, are formed stepwise below the handle post 10. Screw down and penetrate the bottom of the handle post 10 into any one of the holes 15, 16, and 17 as shown by the one-point, two-point, and three-dot chain lines in FIG. The desired height adjustment holes 80, 80 ', ... are made to correspond to the screw holes 13a, and the male screw 13b is fastened to fix the handle 8 at a desired height position.

  In the figure, reference numeral 9 denotes a saddle post. The upper end of the saddle post is fixed to the saddle 90 and the curvature of the saddle frame 4 is the same, and the saddle post 9 is inserted from the upper end opening of the saddle frame 4 so that the saddle 90 has a desired height. In this position, it is fastened with a male screw 91. Reference numerals 75, 75, 75 and 75 are flanges fixed to the handle frame 1 and the saddle frame 4, respectively.

  In this embodiment, the main frame 7, the front frame 3, the rear frame 6, the handle 8, and the saddle post 9 are formed of an advanced composite material using carbon fiber or aramid fiber as a reinforcing material. As a result, it is optimal because it is lightweight but has high strength and high elasticity.

  Further, in the figure, c is a stay fixed to the main frame 7, i is a gear box, d is a front wheel, d 'is a rear wheel, e is a pedal, f is a crank, g is a drive shaft, and h is a universal joint. Of course, the gear chain system may be used as a part that is attached when using the frame of the present invention and that drives the rear wheel d ′. Note that the illustrated front wheel d and rear wheel d ′ may be further miniaturized, and in that case, the carrying performance as a two-wheeler is further improved without substantially impairing the ride comfort.

  Next, the usage and operation of the embodiment of the present invention will be described. For use as a two-wheeled vehicle, the male screw 91 is loosened to bring the saddle 90 to a desired position and the male screws 60 and 91 are screwed, and the handle post 10 is inserted into the desired hole among the vertical hole 15 and the inclined holes 16 and 17. At the same time, the male screw 13b is tightened through a desired hole among the height adjusting holes 80, 80 ', and the angle and height of the handle post 10 are adjusted.

  At this time, since the saddle frame 4 and the saddle post 9 are in a concave arc shape, the distance between the saddle 90 and the handle 8 increases as the saddle post 9 is pulled up and the handle post 10 is tilted forward in the same manner. The height of the saddle 90 and the handle 8 can be adjusted according to the length, and at the same time the distance can be adjusted, and the front frame 3 and the rear frame 6 have a concave arc shape, and the entire frame exhibits a buffering action, so that it is comfortable to ride. Is very good. 2, the male screw 12 is screwed into the middle of the screw hole 73 so that the handle frame 1 can be rotated horizontally, and the male screw 60 is tightened so that the saddle frame 4 cannot be rotated.

  For use as a two-wheeled vehicle, the male screw 60 is loosened, the handle frame 1 and the saddle frame 4 are horizontally rotated 90 degrees in opposite directions, and the male screws 12 and 60 are tightened to the state shown in FIG. At this time, as shown in FIG. 7, the heads 11 and 42 are inserted into the short tubes 70 and 71, so that the vehicle body width is sufficient as the distance L2 as shown in FIG. 7, compared with the conventional example L1. It is extremely small, and it is not inconvenient if it is put on a train or a car. Further, by attaching a means for attaching a travel bag or a means for attaching a shopping basket to the frame of the present invention, as shown in FIG. When pulled up, the stoppers 74 b and 74 b come into contact with the bottom surface of the main frame 7. As a result, it can be easily moved as shown.

  For example, take a bicycle from your home to the station, route it like a travel bag with casters on the station premises or on the train, use it as a bicycle again from the arrival station, and provide a bicycle that can be stood beside the desk at the workplace As in the conventional example, instead of pushing the bicycle handle itself with both hands at the time of twin wheels, it is sufficient to hold and pull the hand grip, it is easy to carry, and it is larger than a caster compared to a travel bag with casters. Pneumatic tires can be used, making it easy to transport when getting on and off flat surfaces, slopes, and stairs. The present invention includes not only ordinary bicycles but also electric bicycle frames. In addition, storage in the home (there is no bicycle storage in condominiums, there are cases where it must be left on the road) and storage in the car can be easily and quickly, and theft prevention effect can be achieved .

It is the side view which notched a part of this invention. It is the enlarged plan view which notched a part of main frame in this invention. It is an enlarged plan view which shows the attachment member of the handle post in this invention. It is an AA cross section. It is a side view which shows the use condition when this invention is made into a two-wheeled vehicle. It is a front view when this invention is used as a two-wheeled vehicle. It is space | interval explanatory drawing of the handle | steering-wheel and saddle of this invention.

Explanation of symbols

1 Handle frame 2 Front fork 3 Front frame 4 Saddle frame 5 Rear fork 6 Rear frame 7 Main frame 8 Handle 9 Saddle post 10 Handle post

Claims (4)

A front frame consisting of a handle frame and a front fork is formed in an inward concave arc shape, a rear frame consisting of a saddle frame and a rear fork is formed in an inward concave arc shape, and the handle frame is formed at the front end of the main frame, A bicycle frame characterized in that the saddle frame is horizontally attached to a rear end, a handle is provided on the handle frame, and a saddle post is provided on the saddle frame so as to be adjustable in height. 2. A bicycle frame according to claim 1, wherein a handle post is attached to an upper end of the handle frame so as to be adjustable in inclination in the front-rear direction. 2. The bicycle frame according to claim 1, wherein a saddle post having the same curvature as that of the concave arc-shaped saddle frame is provided in the saddle frame so as to be detachable. 2. The bicycle frame according to claim 1, wherein a hand grip is attached to the main frame so as to be movable up and down.

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