JP2663457B2 - How to determine the bicycle frame size - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for determining the optimal size of a bicycle frame for a user's body. 2. Description of the Related Art Conventionally, several types of bicycle frames are prepared in a standard size, and a user usually determines a frame size based on the height of the bicycle frame. But,
Recently, along with the diversification of tastes, it has become unsatisfactory to select the frame size of a bicycle from among the ready-made standard ones. Thus, bespoke bicycles have been put on the market where the user can select a more optimal size. The problem to be solved by the invention The problem here is how to determine the optimal frame size for the user's body. A method of individually measuring the height, the length of the legs, the arms, and the like and determining a size suitable for them is also conceivable, but this complicates the production control of the frame and increases the cost. SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve such a problem, and by using a measuring device similar to a bicycle frame, a frame adapted to a user without complicating the production control of the frame. It is an object of the present invention to provide a method for easily determining a size. Means for Solving the Problems In order to achieve this object, a method for determining the size of a bicycle frame according to the present invention comprises a base pipe provided with a vertical pipe extending from the hanger part having a pedal crank to the upper rear and a front pipe. The lower part is fitted to the vertical pipe so that the vertical position can be adjusted, the rear post part has a saddle on the upper part, and the lower part can be fitted to the front pipe so that the vertical position can be adjusted, and the upper part can be adjusted so that the longitudinal position can be adjusted. Front post with a horizontal handle post,
Determining the position of the rear post in accordance with the user by using a measuring instrument provided in connection with the front post and having an index indicating a position corresponding to the hub of the bicycle front wheel; The method includes a step of determining the position of the front post portion in accordance with the position, and a step of determining the position of the lateral handle post based on the index while the user straddles the measuring instrument and looks at the index. In the present invention, the user straddles the measuring device, puts his foot on the pedal, actually pedals, checks whether the operation can be performed easily, and determines the positions of the rear post portion and the front post portion. Since the front and rear positions of the handle are determined by taking the posture and matching the user's line of sight to the center of the handle and the index, it is possible to determine an optimal frame size for the user. In addition, since the frame size is determined by a specific measuring instrument, production control such as selection of a frame pipe is easy even when producing a frame of a selected size. Embodiment FIG. 1 shows the overall configuration of a measuring instrument according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a base, and a support 2 is erected substantially at the center, and a hanger 3 is provided at the upper end thereof. Above the hanger part 3, a standing pipe 4 is provided so as to be inclined upward and rearward. Reference numeral 5 denotes a front pipe provided at the front of the base 1 so as to be inclined upward and forward, reference numerals 6 and 7 denote standing pipes 4, pipes for reinforcing the front pipe 5, reference numeral 8 denotes a crank supported on the hanger part 3, reference numeral 9 denotes a crank. It is a pedal. Reference numeral 10 denotes a seat post whose lower part is fitted to the upright pipe 4, and the vertical position of the seat post 10 can be adjusted by operating a fastener provided on the upright pipe 4. A scale 10a indicating the seat size is provided below the seat post 10, and the scale at the lowermost end exposed from the pipe 4 indicates the optimum seat size. A saddle post 12 having a seat 11 is fitted on the upper portion of the seat post 10 so that the upper and lower positions of the saddle post 12 can be adjusted by a fastening tool of the seat post 10. In the present embodiment, the seat post 10 and the saddle post 12 are used as a rear post. Reference numeral 13 denotes a head pipe post fitted to the front pipe 5, and the vertical position of the post 13 can be adjusted by operating a fastener provided on the front pipe 5. Scale at the bottom of post 13 to indicate size
13a is closed, and the scale at the lowermost end exposed from the front pipe 5 indicates the size. A head pipe 14 is fixed to the upper end of the head pipe post 13 so as to be inclined forward and downward.
The upper and lower positions can be freely adjusted by the tightening tool provided at the position. In this embodiment, the front post portion includes the head pipe post 13, the head pipe 14, and the upright handle post 15. Further, a horizontal handle post 16 to which the handle is fixed is fitted to the upper portion of the upright handle post 15 so as to be adjustable in the front-rear position by a fastener provided on the post 15. Reference numeral 17 denotes a bar having an index 18 at a position corresponding to the hub of the front wheel of the bicycle and fixed to the head pipe 14 along an extension of the head pipe 14. Next, in order to determine the frame size, the user straddles the above-described measuring device, puts his foot on the pedal, and adjusts one of the left and right cranks on the extension of the vertical pipe 4. At this time, make sure the soles are horizontal or slightly lower.
In this case, if your legs are stretched out,
Lower, and raise post 10 if the legs are too tight. In this way, the position of the optimal post 10 is determined. The value of the lowermost end of the scale 10a at this time is the sheet size.
The position of the head pipe post 13 is adjusted according to this size. For example, if the above-mentioned sheet size is 530, the post 13
The position of the seat post is set to fit it. Once the positions of the seat post 10 and the head pipe post 13 have been determined in this way, the user again straddles the measuring instrument, makes the upper body parallel to the ground, and looks at the index through the center of the handle. Adjust the front and rear positions of the side handle posts so that they are all hidden or hidden. Based on the above measurements, the size of the bicycle frame shown in FIG. 3 is determined. That is, the seat size determined by the position of the seat post 10 is the size of the standing pipe b of the bicycle frame a, and if this is determined, the dimensions of the entire frame are determined. Also, the position of the lateral handle post is determined by the scale attached to the post, which determines the protrusion size of the handle post of the bicycle. Since the frame size is determined by using a specific measuring instrument in this manner, if a frame-constituting pipe that matches the scale of the measuring instrument is prepared, production management is facilitated. If a spring or the like that gives resistance to the rotation of the pedal is provided on the hanger, the frame size can be determined in the same way as when riding. In addition, the front post portion and the rear post portion may be formed separately as in this embodiment, but needless to say, they may be formed integrally. According to the present invention, the optimum frame size can be easily determined. Also, since the frame size is determined by a specific measuring instrument, production management such as selection of a frame pipe is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a measuring instrument used in an embodiment of the present invention, FIG. 2 is an explanatory view showing how a handle post is projected, and FIG. 3 is a side view of a bicycle frame. FIG. 1 ... Base, 3 ... Hanger, 4 ... Standing pipe, 5 ...
... front pipe, 10 ... seat post, 12 ... saddle post, 13 ... head pipe post, 14 ... head pipe,
15… Vertical handle post, 16… Horizontal handle post, 17
… Bar, 18 …… Index.

Claims (1)

(57) [Claims] A base provided with a vertical pipe extending from the hanger part having the pedal crank to the upper rear and a front pipe, and a lower post is fitted to the vertical pipe so that the vertical position can be adjusted, and a rear post is provided with a saddle at the upper part. A front post part having a lower part fitted to the front pipe so as to be vertically adjustable, and an upper part provided with a lateral handle post fitted to the front pipe so that the front and rear position can be adjusted; and Determining the position of the rear post part according to the user using a measuring instrument having an index indicating a position corresponding to the hub of the bicycle front wheel, and adjusting the position of the front post part according to the position of the rear post part. A method of determining a bicycle frame size, comprising the steps of: determining a position; and, based on the index, determining a position of the lateral handle post according to a posture in which a user straddles a measuring device and looks at the index.