JP2009202607A - Measuring apparatus for selecting bicycle frame size - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring apparatus for selecting a bicycle frame size, capable of avoiding a saddle from leaning during seat angle adjustment and of easily adjusting a crank length. <P>SOLUTION: A saddle posture holding link mechanism 60 which holds a saddle 11 is provided such that an upper connecting member 6 constituting a parallel link mechanism along with a base 1 is parallel to the top surface of the saddle 11. This keeps the posture of the saddle 11 with its top surface parallel to the base and prevents the saddle 11 from leaning during adjustment of a seat angle θ. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a measuring apparatus for selection that is used when determining the size of a bicycle frame adapted to a user's body.

Some bicycles are manufactured in a so-called made-to-order manner according to the demands of the orderer, including the shape and dimensions of the frame.
For this type of bicycle, it is desirable to determine the shape and dimensions of the frame according to the body shape of the user. However, what matters here is how to determine a frame size optimized for each individual user. One of the methods is to measure the user's physique, that is, the height, leg, arm length, etc. by physical measurement and determine the size that fits them. It is time consuming, and it is not easy to determine the size of the frame that best fits the conditions obtained by the measurement. As a result, the frame production process and production management are complicated and expensive. I'll follow you.

  As one method for dealing with this problem, Patent Document 1 uses a frame size selection measuring device similar to a bicycle frame, so that it is suitable for the user without complicating the production management of the frame. A method by which the frame size can be easily determined is disclosed.

In the invention described in Patent Document 1, a frame size selection measuring device shown in FIG. 10 is used as a frame size selection measuring device similar to a bicycle frame.
In this figure, reference numeral 101 denotes a base placed on a horizontal flat surface such as a floor surface. A support column 102 is erected substantially at the center, and a hanger portion 103 is provided at the upper end thereof. Above the hanger portion 103, a standing pipe 104 is provided so as to be inclined rearward at the top.

  105 is a front pipe provided at the front of the base 101 so as to be inclined upward, 106 and 107 are pipes that reinforce the standing pipe 104 and the front pipe 105, 108 is a crank that is pivotally supported by the hanger part 103, 109 is It is a pedal. Reference numeral 110 denotes a seat post having a lower portion fitted to the standing pipe 104, and the vertical position of the seat post 110 can be adjusted by operating a fastening tool provided on the standing pipe 104.

  A scale 110a indicating the seat size is attached to the lower part of the seat post 110, and the scale at the lowermost end exposed from the pipe 104 represents the optimum seat size. On the upper part of the seat post 110, a saddle post 112 having a seat 111 is fitted by a fastener of the seat post 110 so that the vertical position can be adjusted.

In the above, the seat post 110 and the saddle post 112 are used as the rear post portion.
Reference numeral 113 denotes a head pipe post fitted to the front pipe 105, and the vertical position of the head pipe post 113 can be adjusted by operating a fastening tool provided on the front pipe 105.

  A scale 113a indicating the matching size is attached to the lower part of the head pipe post 113, and the scale at the lowermost end exposed from the front pipe 105 represents the matching size. A head pipe 114 is fixed to the upper end of the head pipe post 113 so as to be inclined forward and downward, and a vertical handle post 115 is adjustable on the upper portion of the head pipe 114 by a fastening tool provided on the head pipe 114. Is fitted.

In the above, the head pipe post 113, the head pipe 114, and the standing handle post 115 are used as the front post portion.
Further, a horizontal handle post 116 to which a handle 121 is fixed is fitted on the upper portion of the standing handle post 115 by a fastening tool provided on the post 115 so that the front and rear position can be adjusted. Reference numeral 117 denotes a bar which has an index 118 at a position corresponding to the hub of the bicycle front wheel and is fixed to the head pipe 114 along the extension line of the head pipe 114.

  In order to determine the frame size using this frame size selection measuring device, the user can straddle the frame size selection measuring device, step on the pedal 109, actually pedal, and run smoothly. By checking this, the positions of the rear post portion and the front post portion can be determined, and a frame size suitable for the user can be determined.

  In addition, since the frame size is determined in a state that is standardized to some extent by the above-described measuring device, if a common (standardized) measuring device is used at each measurement site, it is selected according to the measurement result. When producing a frame of a size, for example, regarding the selection of the frame configuration pipe, production management is facilitated, such as preparing a frame configuration pipe that matches the scale of the measuring device.

  However, in such a conventional bicycle frame size selection measuring device, although it is possible to determine a suitable length of each frame constituting pipe, the angle between each frame constituting pipe is fixed, so that the user can Connect the frame constituent pipes at an angle by adjusting the relative positional relationship between the saddle position, pedaling position, and handle position. However, there is a problem that an appropriate angle cannot be determined for the adjustment.

  When the angle formed by the frame constituting pipes is changed, the angle (seat angle) between the base (or the ground or floor) and the member (seat post) supporting the saddle is changed.

  The size of the seat angle affects the posture of the bicycle user when pedaling across the saddle. That is, if the seat angle is large, the posture is to stick out the waist, and if the seat angle is small, the posture is to pull the waist.

  In order to ride comfortably on a bicycle, the posture during pedaling is also an important factor, so the demand for a bicycle that is well-adjusted for yourself demands a frame that can be pedaled in a more comfortable posture was there.

  This demand can be met to some extent by changing the front and rear position of the saddle, but in order to fully meet the demand, a measuring device for bicycle frame size selection that can measure the appropriate seat angle is necessary. there were.

  Therefore, the present inventors have come up with a measuring device for bicycle frame size selection capable of adjusting the seat angle, so that the measuring device for bicycle frame size selection capable of adjusting the seat angle is used at the measurement site. It has become to.

[Configuration of conventional measuring device for bicycle frame size selection]
FIG. 11 shows an outline of a measuring apparatus for selecting a bicycle frame size capable of measuring a seat angle.

  In FIG. 11, a member denoted by reference numeral 1 is a base placed on a horizontal flat surface such as a floor surface, and this base 1 includes a lower end portion 2 </ b> D of a standing pipe 2 that is a rear support member and a front support. It connects in the attitude | position which supports each lower end part 4D of the front pipe 4 which is a member.

  The lower portion of the seat post 10 as a rear post is fitted to the upper portion of the standing pipe 2, and the standing pipe of the seat post 10 is operated by operating the seat post cam lever 10 b which is an operating portion provided at the upper end portion of the standing pipe 2. 2 can be adjusted.

  A saddle 11 having a saddle seat 14 that serves as a passenger seat and a saddle frame 12 that supports the saddle seat 14 is attached to the upper portion of the seat post 10, and a saddle posture adjusting means (not shown) is operated. Thus, the angle (posture) formed by the saddle 11 and the seat post 10 can be adjusted.

  A seat post height scale 10a indicating the fit size of the seat post 10 is attached to the side face of the seat post 10, and the scale of the seat post 10 (saddle of the saddle) is suitable for the scale closest to the operation portion exposed from the vertical pipe 2. Height).

  A lower portion of a standing handle post 13 as a front post is fitted to the upper portion of the front pipe 4, and the operation with respect to the front pipe 4 is performed by operating a standing handle post cam lever 13 b which is an operation portion provided at the upper end portion of the front pipe 4. The vertical position of the vertical handle post 13 can be adjusted.

  A handle stem height scale 13a representing the height of the handle stem is attached to the side surface of the standing handle post 13, and the scale closest to the operation portion exposed from the front pipe 4 represents the optimum handle stem height. Become. A handle 16 is attached to the upper portion of the standing handle post 13.

  Further, the lower end 4D of the front pipe 4 and the lower end 2D of the upright pipe 2 are supported so as to be rotatable with respect to the base 1 via connection pins Pa and Pb. (It is to be noted that means such as a pin is also interposed in other pivotable portions). A crankshaft 9 to which left and right crank arms 7L and 7R are attached is rotatably supported on the hanger portion 3, and pedals 8L and 8R are rotatably supported on end portions of the crank arms 7L and 7R, respectively. Yes.

The upper part 2U of the standing pipe 2 and the upper part 4U of the front pipe 4 are rotatably connected via a connecting pin by a top pipe 6 which is an upper connecting member. As shown in FIG. The distance L _U from the upper part 2U to the upper part 4U of the front pipe 4 is the distance between the support parts of each pipe on the base 1, that is, the distance L from the lower end part 2D of the standing pipe 2 to the lower end part 4D of the front pipe 4 _It is equal to _D (L _U = L _D ).

Further, a distance L ₂ from the lower end 2D of the seat tube 2 to the upper 2U of the seat tube 2, which is equal to the distance L ₄ from the lower end portion 4D of the front pipe 4 to the upper 4U before pipes 4 (L ₂ = L ₄ ).

Each positional relationship (L _U = L _D , L ₂ = the lower end portion 2D of the standing pipe 2, the upper portion 2U of the standing pipe 2, the lower end portion 4D of the front pipe 4 and the upper portion 4U of the front pipe 4 is connected. L ₄ ), the quadrangle surrounded by the four members of the base 1, the standing pipe 2, the front pipe 4, and the top pipe 6 becomes a parallelogram, and the four connecting portions that can be rotated via the connecting pins are It is the apex of the parallelogram. That is, since the four members of the base 1, the standing pipe 2, the front pipe 4, and the top pipe 6 constitute a parallel link mechanism, each member expands and contracts even if each member is rotated around each connecting portion. Unless otherwise, the relationship of L _U = L _D , L ₂ = L ₄ does not change, and the quadrangle surrounded by each member does not change, and therefore the top pipe 6 is parallel to the base 1. Continue to maintain a supported posture.

[Frame size measurement method]
In order to determine the optimum frame size for the user using this bicycle frame size selection measuring device, first, the user straddles the saddle 11 of the measuring device and takes a posture in which the waist is horizontal, and the pedal 8L, A foot is put on 8R, and one of the crank arms 7L and 7R is placed on the extension line of the standing pipe 2. At this time, the user puts on the shoes to be used during running so that the sole of the shoe is horizontal or slightly rearwardly lowered, and the foot ball of the foot is aligned with the center of the pedals 8L and 8R. Thus, when the knee is fully extended, or when the pedals 8L and 8R are reversely rotated and the waist is shaken, the saddle 11 is too high, so the seat post 10 is lowered, and when the knee is bent too much, the saddle 11 is too low. Raise the seat post 10. In this way, a suitable position of the seat post 10 is determined. The value at the lowest end of the scale 10a at this time is the suitable size of the seat post 10.

  The height of the handle stem is adjusted according to the fit size of the seat post 10. That is, if the value of the seat post height adjustment scale 10a is equal to the value of the handle stem height adjustment scale 13a, the standing handle post 13 is set to a position suitable for the position of the seat post 10. Has been.

[Configuration of the seat angle adjuster]
The bicycle frame size selection measuring device shown in FIG. 11 is provided with a seat angle adjuster 20 as an angle adjusting means so that the seat angle can be measured.

  The seat angle adjuster 20 is arranged so as to connect the upright pipe 2 and the front pipe 4. The seat angle adjuster 20 includes first and second angle adjustment pipes 20i and 20j, which are first and second angle adjustment members, and the first and second angle adjustment pipes 20i and 20j, respectively. The other end of the first angle adjusting pipe 20i is connected to the front pipe 4 via a connecting pin so as to be rotatable, and is connected to a second angle. The other end of the adjusting pipe 20j is rotatably connected to the standing pipe 2 via a connecting pin. An angle display scale 20a representing the seat angle θ is attached to the side surfaces of the first and second angle adjusting pipes 20i and 20j, and the scale closest to the long nut 20b exposed from the long nut 20b is the optimum seat. This represents the angle θ.

Seat angle adjuster 20, by operating the long nut 20b is the angle control member, the dimension L _A between the seat tube 2 and the front pipe 4 is configured to vary.

  That is, the direction of the female thread-like portion formed on the inner surface of both ends of the long nut 20b (screw winding direction) is opposite to each other at both ends (one is left-handed and the other is right-handed) One end of each of the first and second angle adjusting pipes 20i and 20j is processed into a male screw shape that can be screwed with the female screw portion of the long nut 20b (one is left-handed and the other is right-handed. Therefore, when the long nut 20b is rotated in a plane perpendicular to the length direction, the exposed portions of the first and second angle adjusting pipes 20i and 20j from the long nut 20b are changed according to the rotation direction. Extends to the other end or contracts to one end.

Varying the length L _A of the sheet angle adjuster 20 operates the long nut 20b, the seat angle θ is changed accordingly.
This will be described with reference to FIG. 11 and 12, 2M is a connecting portion between the standing pipe 2 and the second angle adjusting pipe 20j, and 4M is a connecting portion between the front pipe 4 and the first angle adjusting pipe 20i. A distance from the connecting portion 2M to the lower end portion 2D of the standing pipe 2 is L _M2 , and a distance from the connecting portion 4M to the lower end portion 4D of the front pipe 4 is L _M4 .

11 and 12, the seat angle θ is an angle formed by the base 1 and the standing pipe 2, and a clockwise direction in the figure is a positive direction with an extension line of the base 1 as a reference line.
Considering an imaginary line parallel to the base 1 and the top pipe 6 indicated by a broken line in FIG. 12, the following equation (1) is established by the cosine theorem.
(1) L _A ² = L _D ² + (L _M4 −L _M2 ) ² −2L _D (L _M4 −L _M2 ) cos θ
Solving this for θ gives the following equation (2).
^{_{(2) θ = ArcCos [{}} L D 2 + (L M4 -L M2) 2 -L A 2} / 2L D (L M4 -L M2)]
If the range of θ is limited to 0 ≦ θ <π, θ is uniquely determined for a specific L _A (> 0) by the above equation (2).

Thus, by expanding and contracting the L _A by operating a long nut 20b, it becomes possible to adjust the sheet angle theta.
[Sheet angle measurement method]
In order to determine a seat angle θ suitable for the user, first, the seat angle θ is roughly adjusted according to the frame size determined by the above-described frame size measurement. Whether or not pedaling can be performed in a posture is confirmed, and the seat angle θ is finely adjusted by operating the long nut 20b to determine the seat angle θ that can be pedaled in a more comfortable posture.

Based on the above measurements, a bicycle frame size suitable for the user can be determined. In addition, since the frame size can be standardized by using this measuring device, production management is facilitated by preparing a frame configuration pipe that matches the scale of the measuring device.
Japanese Patent No. 2663457

  However, in the bicycle frame size selection measuring apparatus capable of measuring the seat angle θ, when the seat angle θ is changed, the seat post 10 (and the upright pipe 2 supporting the saddle 11) and the base are supported. 1 is changed, and the upper surface of the saddle 11 is inclined from the horizontal. Accordingly, there is a problem that the inclination of the saddle 11 must be corrected by operating the saddle angle adjusting means each time the seat angle θ is changed and using a level.

  As described above, when the seat angle θ is changed, the user changes the posture during pedaling. At this time, as the posture changes, the crank length may have to be changed in order to perform pedaling comfortably. In addition, in the case of sports bicycles, the crank length is often changed depending on the body form (leg length), the application (in the event of competition), the track condition (uphill, rough road), and the like. The crank length is changed by removing the crank arms 7L and 7R from the crankshaft 9 pivotally supported by the hanger 3 and attaching a new crank arm to the hanger 3 with a different length from the removed crank arms 7L and 7R. However, the crank arms 7L and 7R are usually attached to the crankshaft 9 so as not to easily come off in order to prevent them from falling off the hanger 3 during pedaling. In order to meet the demands of a wide variety of users, there are many problems that each requires a lot of labor and labor to remove and replace the crank arms 7L and 7R for changing. There was also the problem of having to prepare a crank arm.

  The present invention provides a bicycle frame size selection measuring device that solves the above-described problems, does not tilt the saddle when adjusting the seat angle, and can easily adjust the crank length.

  The invention according to claim 1 is a bicycle frame size selection measuring device that determines the frame size of the bicycle in accordance with a user, wherein a lower end is rotatably connected to a base and a front portion of the base. A front support member, a rear support member having a lower end pivotably connected to a rear portion of the base, and a hanger portion that pivotally supports a crank of a pedal; an upper portion of the front support member; and a rear support member An upper connecting member that rotatably connects the upper part, a lower part is fitted to the front support member so that the vertical position can be adjusted, a front post to which a handle is attached to the upper part, and a lower part to the rear support member And a rear post fitted so that the vertical position can be adjusted, and the upper connecting member with respect to the base by the base, the front supporting member, the rear supporting member, and the upper connecting member. In parallel The parallel link mechanism is configured, and the two members among the members constituting the parallel link mechanism are connected to each other so that the dimension between the two connected members can be adjusted. An angle adjusting means for adjusting an angle formed by the base and the rear support member by adjusting a dimension is provided, supports a saddle having a riding seat with respect to the rear post, and rotates with respect to the rear post. A movable saddle support means is provided, and a saddle posture holding mechanism for supporting the saddle is interposed between the upper connecting member and the saddle so that the upper connecting member and the upper surface of the saddle are parallel to each other. It is characterized by being.

  By supporting the saddle so that the upper connecting member and the upper surface of the saddle are parallel to each other, the parallel posture of the upper surface of the saddle and the base is maintained, and the saddle does not tilt when adjusting the seat angle.

  According to a second aspect of the present invention, in the first aspect of the invention, the saddle posture holding mechanism is fixed to the saddle and the first parallel link mechanism including an intermediate link member that operates in parallel with the upper connecting member. The saddle receiving member includes a second parallel link mechanism that operates parallel to the intermediate link member.

  With this configuration, the saddle posture holding mechanism can be configured with a relatively simple structure in which the parallel link mechanisms are combined.

  According to a third aspect of the present invention, in the first aspect of the present invention, the two link members that intersect with each other and are connected to each other so as to be pivotable at the intersection are used as one link set, and the saddle posture holding mechanism includes at least one saddle posture holding mechanism. The link structure includes a link structure, and the link structure includes an end portion on the upper connection member side, an end portion on the saddle receiving member fixed to the saddle, and a link portion between each link set. It is a connection structure which is connected so that the crossing angle of each link set can be changed.

  Even with this configuration, the saddle posture holding mechanism can be configured with a relatively simple structure like a magic hand, and the saddle posture holding mechanism when the saddle height is lowered as compared with the combination of the parallel link mechanisms. Can be reduced in the forward protruding width.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the saddle support means includes a rear post side attachment body attached to the upper portion of the rear post, and a saddle side attached to the saddle. A mounting body, a saddle coupling body that connects the saddle in a side view with a horizontal axis centering along the lateral direction as a center, and a posture fixing body that fixes the posture of the saddle side mounting body with respect to the rear post side mounting body It is characterized by having these.

  With this configuration, it is possible to adjust the tightening force of the saddle support means with respect to the saddle frame without using a tool while exhibiting the effect that the posture of the saddle is kept horizontal when adjusting the seat angle.

  The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the saddle is supported on the rear post by a saddle seat serving as a passenger seat and saddle support means, and the saddle seat. A saddle frame for supporting the saddle frame, the saddle support means having a curved upper surface, a communication hole, and a rear post upper body fixed to the upper part of the rear post, and above the rear post upper body. A lower frame receiving member having a curved shape portion that slides in contact with the curved shape of the upper body of the rear post on the lower surface and formed with a long elongated hole in the front-rear direction; and disposed above the lower frame receiving member; An upper frame receiving member having a curved shape portion on the upper surface and having a long hole in the front-rear direction, and an upper frame receiving member disposed above the upper frame receiving member, and a lower surface of the upper frame receiving member An angle determining member that is in a shape that is in sliding contact with the shape portion, a communication hole in the rear post upper body, a long hole in the lower frame receiving member, and a long hole in the upper frame receiving member, and coupled to the angle determining member The saddle frame is clamped by the lower frame receiving member and the upper frame receiving member, and the saddle frame is clamped by the lower frame receiving member and the upper frame receiving member by operating the connecting material. The tightening force can be adjusted.

  With this configuration, it is possible to adjust the tightening force of the saddle support means with respect to the saddle frame without using a tool while exhibiting the effect that the posture of the saddle is kept horizontal when adjusting the seat angle.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the crank arm of the crank supported by the hanger portion is divided into a pedal side crank arm and a hanger side crank arm. An adjusting means for adjusting the length of the sliding mechanism, and an operating portion of the adjusting means, wherein the pedal-side crank arm and the hanger-side crank arm are configured to be slidable with respect to each other. Is provided.

  With this configuration, the crank length can be easily changed when measuring the frame size.

  By supporting the saddle so that the upper connecting member and the upper surface of the saddle are parallel to each other, when the frame size is measured by the bicycle frame size selecting measuring device that can adjust the seat angle, the upper surface of the saddle and the base are Since the parallel posture is maintained, even if the seat angle is adjusted, the saddle does not tilt, the saddle posture is kept horizontal, and the saddle posture is adjusted each time the seat angle is adjusted. Since it becomes unnecessary, frame size measurement can be realized without impairing the operability of the conventional bicycle frame size selection measuring device and faster than the conventional one.

  In addition, since the tightening force of the saddle support means against the saddle frame can be adjusted without using a tool, it is possible to easily adjust the front and rear position of the saddle, which had to be done using a conventional tool. Frame size measurement can be realized.

  In addition, since the crank length can be easily changed when measuring the frame size, it is not necessary to remove the crank arm each time the crank length is adjusted and to install a crank arm of a different length. Rapid frame size measurement can be realized.

[First Embodiment]
FIG. 1 shows a bicycle frame size selection measuring apparatus as a first embodiment of the present invention.

  Note that the same components as those in the bicycle frame size selection measuring apparatus shown in FIG. 11 are denoted by the same reference numerals as those in FIG.

<Configuration of saddle posture holding link mechanism>
The bicycle frame size selection measuring device shown in FIG. 1 is expanded to FIG. 2 as a saddle posture holding mechanism for holding the horizontal posture of the saddle 11 in addition to the configuration of the bicycle frame size selection measuring device shown in FIG. A saddle posture holding link mechanism 60 is provided.

In this embodiment, the saddle posture maintaining link mechanism 60 is configured such that a combination of two parallel link mechanisms is interposed between the top pipe 6 and the saddle 11.
More specifically, as shown in FIG. 2, first and second link members 61 and 62 having the same length are respectively connected to two points 6F and 6B on the top pipe 6 at the lower end portions 61D and 62D. 6, the upper end portions 61U and 62U of the first and second link members 61 and 62 are supported by a third link member 63 which is an intermediate link member. It is pivotally connected via the front end portion 63F ₁ and the rear end portion 63B respectively connecting pins ₁ and.

  Here, the distance from the lower end portion 61D of the first link member 61 to the lower end portion 62D of the second link member 62, and the upper end portion 62U of the second link member 62 from the upper end portion 61U of the first link member 61. The distance from the lower end 61D of the first link member 61 to the upper end 61U of the first link member 61 and the lower end of the second link member 62. It is connected at a position where the distance from 62D to the upper end 62U of the second link member 62 becomes equal.

  Accordingly, the first, second, and third link members 61, 62, and 63 and the top pipe 6 constitute a first parallel link mechanism, and a quadrangle surrounded by them forms a parallelogram, and the third link member 63. Operates in parallel to the top pipe 6.

Then, each of the first 4 of the same length, the fifth link member 64 and 65, the lower end portion 64D, respectively connecting pin to the front end portion 63F ₂ and the rear end portion 63B ₂ of the third link member 63 at 65D The upper end portions 64U and 65U of the fourth and fifth link members 64 and 65 are connected to the front end portion 68F and the rear end portion 68B of the saddle receiving member 68, respectively. It is connected so that rotation is possible.

  Here, the distance from the lower end portion 64D of the fourth link member 64 to the lower end portion 65D of the fifth link member 65 and the upper end portion 64U of the fourth link member 64 to the upper end portion 65U of the fifth link member 65. And the distance from the lower end portion 64D of the fourth link member to the upper end portion 64U of the fourth link member and the upper end of the fifth link member from the lower end portion 65D of the fifth link member. It is connected at a position where the distance to the portion 65U is equal.

  Therefore, the third, fourth, and fifth link members 63, 64, 65 and the saddle receiving member 68 constitute a second parallel link mechanism, and the quadrangle surrounded by these becomes a parallelogram, and the saddle receiving member 68 is It operates in parallel with the third link member 63.

  As shown in FIG. 3 (a), the saddle receiving member 68 is fixed to the saddle 11 by sandwiching a saddle frame 12 extending in a U shape in the front-rear direction when viewed from above (observed from above). Has been.

Further, the saddle support means 30 for supporting the saddle frame 12 on the seat post 10 supports the saddle frame 12 in a posture capable of rotating with respect to the seat post 10.
As an example of a method for attaching the first and second link members 61 and 62 to the top pipe 6, as shown in FIG. 3A, lower end portions 61D and 62D of the first and second link members are provided. a connecting member 6c ₁ that insertion holes are formed in the connecting pin for connecting may be directly affixed to the top pipe 6.

As another method, as shown in FIG. 3B, an attachment member 6c ₂ to be fitted to the top pipe 6 is prepared, and one end 61D of the first and second link members is provided on the attachment member 6c ₂ . , sandwiched coupling plate 6c ₃ of the insertion hole of the connection pin for connecting the 62D is formed, by fixing the coupling plate 6c ₃ by screws 6c ₄ as shown in FIG. 3 (c) to the mounting member 6c _2, coupling The plate 6c ₃ may be fixed to the top pipe 6 along the top pipe 6 so as not to rotate with respect to the mounting member 6c _{2. In} this case, the connecting member 6c is connected to the top pipe 6. There is an advantage that it is not necessary to perform the process of fixing ₁ and the mounting position can be flexibly changed.

<Configuration of saddle receiving member and saddle frame>
An example of a specific configuration of the saddle receiving member 68 and the saddle frame 12 will be described below.
As shown in FIG. 3A, the saddle frame 12 is bent so as to be substantially U-shaped when the rod-like body is viewed in plan, and the intermediate portion 12c in the vicinity of the saddle support means 30 is linear. And is inclined upward as it approaches the front U-shaped curved portion from a position slightly away from the saddle support means 30 (this inclined portion is hereinafter referred to as the inclined portion 12b). The front part 12a in the vicinity of the part becomes straight again toward the front. Further, the saddle frame 12 is inclined upward as it approaches the rear opening 12d from the intermediate portion 12c.

  The saddle frame 12 is assembled in a posture in which the front portion 12a and the front portion of the intermediate portion 12c are sandwiched from above and below by a saddle receiving member 68 that forms the upper side of the second parallel link mechanism.

  As shown in FIG. 3A, the saddle receiving member 68 includes a saddle receiving member main body 68c that forms the upper side of the second parallel link mechanism and has a substantially L shape in side view, and a front side of the saddle receiving member main body 68c. The front upper body 68a is attached to the upper surface portion from above, and the rear upper body 68b is attached to the rear upper surface portion of the saddle receiving member main body 68c from above.

  Here, in the saddle receiving member main body 68c, the front upper surface portion is higher than the rear upper surface portion in accordance with the height difference between the front portion 12a and the intermediate portion 12c of the saddle frame 12, and the height between them is increased. The saddle receiving member main body 68c does not interfere with the inclined portion 12b of the saddle frame 12 due to the stepped shape having a difference in height (step).

  The front upper surface portion of the saddle receiving member main body 68c receives the front portion 12a of the saddle frame 12 from below, and is covered with the front upper body 68a and screwed, so that the front portion 12a of the saddle frame 12 is secured. It is pinched.

  Similarly to the case of the front portion 12a of the saddle frame 12 described above, in the intermediate portion 12c of the saddle frame 12, the rear upper surface portion of the saddle receiving member main body 68c together with the rear upper body 68b of the intermediate portion 12c of the saddle frame 12 is provided. Hold the front part.

  Accordingly, as shown in FIG. 3A, the saddle frame 12 causes the upper surface of the saddle seat 14 to be connected to the line segment connecting the front end portion 68F and the rear end portion 68B of the saddle receiving member 68 by the saddle receiving member 68. Are supported by the second parallel link mechanism in a parallel posture.

  The saddle frame 12 is fixed to the saddle receiving member 68 at four points in total by the front upper surface portion and front upper body 68a of the saddle receiving member main body 68c and the rear upper surface portion and rear upper body 68b of the saddle receiving member main body 68c. As a result, the saddle frame 12 moves in accordance with the movement of the saddle receiving member 68.

<Operation of link mechanism>
By the saddle posture holding link mechanism 60, the posture of the saddle 11 (the posture of the upper surface of the saddle seat 14 disposed above the saddle frame 12) is kept horizontal. Hereinafter, this operation will be described.

  First, as described above, in the bicycle frame size selection measuring device including the seat angle adjuster 20, the base 1, the standing pipe 2, the front pipe 4, and the top pipe 6 constitute a parallel link mechanism. During the adjustment, the top pipe 6 moves in parallel with the base 1.

  Next, since the first, second, and third link members 61, 62, and 63 and the top pipe 6 also form the first parallel link mechanism, the third link member 63 is adjusted when the seat angle θ is adjusted. Moves parallel to the top pipe 6.

  Since the third, fourth, fifth link members 63, 64, 65 and the saddle receiving member 68 also form the second parallel link mechanism, the saddle receiving member 68 is adjusted when the seat angle θ is adjusted. 3 link member 63 is moved in parallel.

  As a result, the saddle receiving member 68 moves in parallel with the base 1 when the seat angle θ is adjusted. Further, since the saddle receiving member 68 fixes the saddle 11 by sandwiching the saddle frame 12, the saddle frame 12 operates following the movement of the saddle receiving member 68, and is disposed above the saddle frame 12 and above. The saddle seat 14 also moves parallel (horizontally) to the base 1.

  Here, since the saddle support means 30 is rotatable with respect to the seat post 10, when adjusting the seat angle θ (tilting the saddle posture in the direction of the arrow Angel in FIG. 2), the top pipe 6, 3, the parallel movement of the link member 63 and the saddle receiving member 68 and the rotation of the seat post 10 cause the saddle 11 (saddle frame 12 and saddle seat 14) to cancel the inclination of the saddle 11 itself due to the rotation of the seat post 10. , And moves parallel to the base 1 so that the posture of the saddle 11 is kept horizontal.

  Considering the relative positional relationship between the point on the saddle receiving member 68 and the point on the top pipe 6, for example, the relative positional relationship between the two points 68F and 6F, the saddle posture holding link mechanism 60 is parallel. Since the two link mechanisms are combined, the relative positional relationship between these two points in the height direction can be changed independently of the relative positional relationship in the horizontal direction. Accordingly, since the height of the saddle receiving member 68 can be changed while the position of the top pipe 6 is fixed, the vertical position adjustment of the seat post 10 by the operation of the seat post cam lever 10b (the saddle 11 in the direction of the arrow Height in FIG. 2). ), The vertical position of the seat post 10 can be adjusted while keeping the seat angle θ (of course, the posture of the saddle 11 is also kept horizontal).

If it is difficult to adjust the seat angle θ in the direction in which the saddle 11 is moved upward or to adjust the vertical position of the seat post 10 due to the weight of the saddle 11 or the seat post 10, FIG. As shown in b), a spring as a biasing member around the connecting portion of the top pipe 6 or the third link member 63 (the lower end portion 61D of the first link member 61 and the lower end portion 65D of the fifth link member 65). 60S may be assembled. For this assembly, for example, a bolt 60S ₁ , a washer 60S ₂ , another washer 60S ₃ , a nut 60S _{4 and the} like are used.

  The spring 60S has a saddle posture holding link mechanism in the direction in which the saddle 11 moves upward (in the direction of the arrow in FIGS. 4A and 4B, that is, the direction in which the area of the parallelogram surrounded by each member increases). The 60 members are energized. By assembling the spring 60S in this manner, the adjustment of the seat angle θ in the direction in which the saddle 11 is moved upward and the vertical position adjustment of the seat post 10 are assisted by the urging force of the spring 60S, so that it is easy to perform. The adjustment of the seat angle θ in the direction in which the saddle 11 is moved downward and the adjustment of the seat post position are against the urging force of the spring 60S, but the operation of pushing downward from above is an operation that is easy for the user to perform. In addition, since the saddle 11 and the seat post 10 have their own weight, the urging force of the spring 60S does not hinder the operation.

  In the present embodiment, the saddle receiving member 68 moves in parallel with the third link member 63 means that a line segment connecting the front end portion 68F and the rear end portion 68B of the saddle receiving member 68 (in other words, , A line segment connecting the connecting portion with the fourth link member 64 and the connecting portion with the fifth link member 65) moves in parallel with the third link member 63. The specific configuration of the member 68 is not limited to that shown in FIG. 3A, and the third, fourth, and fifth link members 63, 64, 65 and the saddle receiving member 68 constitute a parallel link mechanism. It only has to be.

In FIG. 2, the distance from the upper end portion 61U of the first link member 61 to the upper end portion 62U of the second link member 62, and the lower end portion 64D of the fourth link member 64 to the fifth link member 65. The distance to the lower end portion 65D is equal, and the front end portions 63F ₁ and 63F ₂ of the third link member 63 are in the same position when the third link member 63 is viewed from the side (rear end portion 63B). ₁ and 63B ₂ ) are not necessarily in the same position, but the third link member 63 operates in parallel with the top pipe 6, and the saddle receiving member 68 is connected to the third link member 63. It only needs to be able to operate in parallel.

<Configuration of saddle support means>
As a method of configuring the saddle support means 30 to be rotatable with respect to the seat post 10, for example, the following methods are available.

  As shown in FIGS. 5A and 5B, the upper surface 31G of the upper portion 31 of the seat post 10 has a curved shape (in FIGS. 5A and 5B, a concave shape is formed downward, but a convex shape is formed upward. The seat post upper part 31 is a rear post upper body, and a communication hole 31H penetrating in a substantially vertical direction is formed in the seat post upper part 31.

  Further, a lower frame receiver 32 as a rear post side attachment body having a long hole 32H, an upper frame receiver 34 as a saddle side attachment body having a long hole 34H, and a bolt hole 36H are provided further above the seat post upper portion 31. The angle determination member 36 as a saddle coupling body is attached in piles in this order. At this time, the saddle frame 12 is sandwiched between the lower frame receiver 32 and the upper frame receiver 34.

  The clamping force is such that the connecting member 38 (the quick release 38A, the cam lever 38B, or the L-shaped bolt 38C, etc.) as a posture fixing body is connected to the communication hole 31H of the seat post upper part 31 and the length of the lower frame receiver. When the hole 32H, the upper hole 34H of the upper frame receiver, and the bolt hole 36H which is a connecting portion provided in the angle determining member 36 are connected to be connected to the bolt hole of the angle determining member 36 from the communication hole 31H in the upper part of the seat post. It can be changed by adjusting the distance to 36H (for the sake of simplification of the drawing, FIG. 5B shows only the L-shaped bolt 38C as an example of the connecting member 38).

  For example, when the connecting member 38 is an L-shaped bolt 38C, the tip of the L-shaped bolt 38C is screwed into the bolt hole 36H of the angle determining member 36 so that the L-shaped bolt 38C and the bolt hole 36H of the angle determining member 36 are engaged. The distance from the communication hole 31H of the seat post upper part 31 to the bolt hole 36H of the angle determining member 36 can be adjusted by adjusting the degree of screwing with the saddle frame by the lower frame receiver 32 and the upper frame receiver 34. It is possible to change the strength of the clamping force with respect to 12.

  Similarly, when the connecting member 38 is the quick release 38A or the cam lever 38B, the distance from the communication hole 31H of the seat post upper part 31 to the bolt hole 36H of the angle determining member 36 may be adjusted in the same manner.

  On the lower surface of the lower frame receiver 32, a curved shape portion that is in sliding contact with the curved shape portion (upper surface 31G) of the seat post upper portion 31 is formed, and is thus sandwiched between the lower frame receiver 32 and the upper frame receiver 34. The saddle frame 12 can be rotated along the curved portion 31G of the upper portion 31 of the seat post.

  Further, the upper surface of the upper frame receiver 34 also has a curved portion (in FIG. 5A and FIG. 5B, it has a concave shape in the bottom, but may have a convex shape in the upward direction). The lower surface has a curved shape in sliding contact with the curved shape portion of the upper frame receiver 34. The long holes 32H and 34H formed in the lower frame receiver 32 and the upper frame receiver 34, respectively, have a dimension in a direction parallel to the width direction of the saddle that is about the diameter of the bolt hole 31H in the upper part of the seat post. Is longer than the diameter of the bolt hole 31H at the top of the seat post.

  The curved shape portions of the seat post upper part 31, the lower frame receiver 32, the upper frame receiver 34, and the angle determining member 36 are centered on the horizontal axis along the lateral direction of the saddle 11, as shown in FIG. The saddle is formed in a shape that can be tilted when viewed from the side (turnable in the direction of the arrow in FIG. 5B).

  5 (a) and 5 (b), the upper portion 31 itself of the seat post 10 is curved so that the rear post upper body fixed to the upper portion of the seat post 10 and the seat post 10 are integrated. The rear post upper body fixed to the upper portion of the seat post 10 may be separable from the seat post 10.

<Operation of saddle support means>
In this configuration, when a force in a direction to rotate the seat post 10 is applied to the saddle 11 in a state where the saddle posture holding link mechanism 60 is not added, the force is applied to the saddle frame 12 (which constitutes the saddle 11). The lower frame receiver 32 and the upper frame receiver 34 rotate along the curved shape of the seat post 10 together with the saddle frame 12.

  At this time, since the connecting member 38 communicates with the long holes 32H and 34H formed in the front and rear formed in the lower frame receiver 32 and the upper frame receiver 34, the lower frame receiver 32 and the upper frame receiver 34 are connected to the connecting member 38. The connecting member 38 does not follow the rotation of the lower frame receiver 32 and the upper frame receiver 34, and the connecting member 38 lowers its elevation angle (angle relative to the base 1). The frame receiver 32 and the upper frame receiver 34 can be kept unchanged before and after the rotation (when rotating, the connecting member 38 is in the long holes 32H and 34H when viewed from the lower frame receiver 32 and the upper frame receiver 34). To move back and forth relatively).

  That is, the connecting member 38 is attached in communication with the communication hole 31H at the upper part of the seat post, the long hole 32H of the lower frame receiver, the long hole 34H of the upper frame receiver, and the bolt hole 36H of the angle determining member 36, and the saddle posture holding link. When the mechanism 60 is assembled, the upper surface of the saddle 11 is maintained parallel to the base 1 while the attachment state of the connecting member 38 and the holding state of the saddle frame 12 by the lower frame receiver 32 and the upper frame receiver 34 are maintained. The saddle 11 can be tilted with respect to the seat post 10 (as viewed from the side).

The saddle support means 30 also has a rotation stopping function that acts so that the saddle 11 does not rotate left and right about the connecting member 38 as an axis.
First, since the lower surface of the lower frame receiver 32 is in sliding contact with the curved portion (upper surface 31G) of the seat post upper portion 31, the saddle 11 is difficult to turn left and right around the connecting member 38, and the upper frame On the upper surface of the receiver 34, there is provided a rectangular recess portion 35 that is deep enough to embed at least a part of the angle determining member 36 and whose inner surface has the same shape as the side surface shape of the angle determining member 36. By making the lower surface of the curved surface as described above, the side surface of the angle determining member 36 is regulated by the inner surface of the rectangular recess while allowing the posture of the saddle 11 to be tilted, and the saddle 11 is connected to the connecting member 38. Rotating left and right around the axis is prevented.

  5A and 5B, the saddle support means 30 supports the seat post 10 by tightening (clamping) the saddle frame 12 from above and below by the lower frame receiver 32 and the upper frame receiver 34. Normally, the saddle frame 12 is strongly tightened so as not to move back and forth with respect to the seat post 10, but when the front and back position of the saddle 11 is adjusted to the user's preference, this tightening force should be loosened. Thus, the saddle frame 12 can be temporarily moved back and forth with respect to the seat post 10. At this time, as described above, the relative positional relationship in the height direction between the point on the saddle receiving member 68 and the point on the top pipe 6 should be changed independently of the relative positional relationship in the horizontal direction. Therefore, the saddle 11 (the saddle frame 12 to which the saddle receiving member 68 is attached) is moved in the horizontal direction while the top pipe 6 and the seat post 10 are fixed, that is, without changing the height of the saddle 11 or the seat angle θ. Can be made.

  Further, the operation of the connecting member 38 such as the quick release 38A, the cam lever 38B, and the L-shaped bolt 38C (for example, when the connecting member 38 is an L-shaped bolt 38C, the bolt hole 36H of the angle determining member 36 and the connecting member 38 are screwed together. Since the tightening force can be changed only by adjusting the degree), the front and rear position of the saddle 11 can be easily adjusted without using a tool.

  As described above, by using the saddle support means 30, the adjustment of the seat angle θ and the front-rear position adjustment of the saddle 11 can be completed in a short time while keeping the saddle 11 in a horizontal posture.

[Second Embodiment]
FIG. 6 shows a saddle posture holding mechanism used in a bicycle frame size selection measuring apparatus according to a second embodiment of the present invention.

  The saddle posture holding mechanism shown in FIG. 6 is a connecting structure of an expansion / contraction structure (so-called magic hand structure) in which a plurality of link members intersecting each other are joined instead of the saddle posture holding link mechanism 60 in the first embodiment. 90.

<Composition of connection structure>
The connecting structure 90 is composed of a plurality of link sets, in which two link members intersecting each other and rotatably connected to each other via a connecting pin are formed as a single link set. The end portion on the top pipe 6 side of 90, the end portion on the saddle receiving member 68 side, and the connecting portion of each link set are connected so that the crossing angle of each link set can be changed.

Any number of link sets may be connected (or one set). As an example, a case where three link sets are connected in the height direction as shown in FIG. 6 will be described below.
At this time, the intersections 90X ₁ , 90X ₂ , and 90X _{3 of} each link set are connected to each other via a connecting pin so as to be rotatable. Further, the connecting portions 90C ₁ , 90C ₂ , 90C ₃ , 90C _{4 of the} link sets are also connected to each other via a connecting pin so that the crossing angle of each link set can be changed, and the top pipe 6 is connected to one of the lower end portions 91 and 92 of the connecting structure 90 rotatably connected to the saddle receiving member 68 via the connecting pin. Two of the upper end portions 94 and 95 of the 90 (a lower end portion 91 and an upper end portion 94 in FIG. 6) are slidable in the length direction of the top pipe 6 and the length direction of the saddle receiving member 68, respectively. It has become. In FIG. 6, long holes 93H and 96H are provided in the connecting member 93 for supporting the connecting structure 90 on the top pipe 6 and the connecting member 96 for supporting the connecting structure on the saddle receiving member 68, respectively. The lower end 91 and the upper end 94 can slide along the inner surface of 96H in the direction of arrow W in FIG.

  Further, the saddle support means 30 is disposed so as to be rotatable with respect to the seat post 10 as in the first embodiment, and the saddle receiving member 68 holds the saddle frame 12 as in the first embodiment. And support.

<Operation of linked structure>
By the connecting structure 90, the posture of the saddle 11 (the posture of the upper surface of the saddle seat 14 disposed above the saddle frame 12) is kept horizontal. Hereinafter, this operation will be described.

  In the connection structure 90 shown in FIG. 6, it is assumed that the quadrangle surrounded by each link member is a parallelogram. At this time, the quadrilateral formed by connecting the four ends 91, 92, 94, and 95 of the connection structure 90 is also a parallelogram, so that the top pipe 6 and the saddle receiving member 68 are always parallel.

  The quadrangle surrounded by each link member does not necessarily have to be a parallelogram. For example, as shown in FIG. 7, the saddle 11 takes a horizontal posture at a certain point in time, and the side AB (the lower end of the connection structure 90) AB‖DE‖GH (three lines connecting the link portions 91 and 92), DE (the line connecting the connecting portions of the link sets), and GH (the line connecting the upper end portions 94 and 95 of the connecting structure 90). In the case where the shape is such that the line segments are parallel to each other, at this time, the similar relationship of ΔABC∽ΔEDC and ΔDEF∽ΔHGF is established for the triangle surrounded by each side.

  In the connection structure 90 shown in FIG. 7, when the lower end A (91) and the upper end G (94) are slidable, the lengths of the sides AB, DE, and GH are variable, but the sides AC, The lengths of BC, CD, CE, DF, EF, FG, and FH are all unchanged.

  Then, since the ratio of the two sets of sides and the angle between them (vertical angle) are always equal, the similarity relationship for the triangles △ ABC∽ △ EDC, △ ∽DEF∽ △ regardless of the length of the sides AB, DE, GH HGF is always true.

  Accordingly, ∠ABC = ∠EDC and ∠DEF = ∠HGF are always established for the angle (complex phase, etc.), and AB‖DE‖ with respect to the sides AB, DE, GH regardless of the lengths of the sides AB, DE, GH. GH always holds. Therefore, the top pipe 6 and the saddle receiving member 68 are always parallel.

  Further, when more than two sets of links are combined (when there are two or more quadrangles surrounded by link members as shown in FIG. 8A), the links are connected as shown in FIG. 8B. Similarly, even when there is only one set (when two link members intersect in an X shape), the relationship in which the top pipe 6 and the saddle receiving member 68 are always parallel is established.

  As a result, the saddle receiving member 68 moves in parallel with the base 1 during the adjustment of the seat angle θ (inclination of the saddle posture in the direction of the arrow Angel in FIG. 6). Further, since the saddle receiving member 68 is fixed to the saddle 11 by sandwiching the saddle frame 12, the saddle frame 12 (and the saddle seat 14 disposed above the saddle frame 12) also moves in parallel with the base 1. It will be.

  Here, since the saddle support means 30 is rotatable with respect to the seat post 10, when the seat angle θ is adjusted, the top pipe 6, the saddle receiving member 68 is translated and the seat post 6 is rotated. Accordingly, the saddle 11 (saddle frame 12 and saddle seat 14) rotates so as to cancel the rotation of the seat post 10, and as a result, the posture of the saddle 11 is kept horizontal.

  Further, in this connection structure 90, the height of the saddle receiving member 68 can be changed while the position of the top pipe 6 is fixed. That is, when adjusting the vertical position of the seat post 10 by operating the seat post cam lever 10b (moving the saddle 11 in the direction of the arrow Height in FIG. 6), the connecting structure 90 only expands and contracts. Since the front-rear position does not change, the vertical position of the seat post 10 can be adjusted while keeping the seat angle θ (of course, the posture of the saddle 11 is also kept horizontal).

  By interposing the connection structure 90, the seat angle θ can be adjusted in a short time while maintaining the horizontal posture of the saddle 11. Further, when the vertical position of the seat post 10 is lowered, that is, when the saddle height is lowered, the width by which the connecting structure 90 is shortened in the height direction is the sum of the amount of reduction of each link set. The width of the connecting structure 90 projecting forward (retracting backward depending on the configuration) of the bicycle frame size selection measuring device is limited to the projecting width of one link set, which is compared with the first embodiment. The forward projecting width (or backward retracting width) of the connecting structure 90, which is a saddle posture holding mechanism, is reduced.

[Third Embodiment]
FIG. 9 shows a state of a crank arm connected to a crankshaft that is pivotally supported by a hanger part of a bicycle frame size selection measuring apparatus according to a third embodiment of the present invention.

  The crank arm of the bicycle frame size selection measuring device shown in FIG. 9 has a configuration for facilitating adjustment of the crank length. Note that the configuration for facilitating the adjustment of the crank length can be combined with the configuration of the first or second embodiment.

[Configuration around the crank arm]
The crank arm 70R in this embodiment is divided into two parts, a pedal side crank arm 74R and a hanger side crank arm 76R, as shown in FIGS. 9 (a), 9 (b), and 9 (c). One end of the hanger side crank arm 76R is slidably connected to each other.

  Similarly, the crank arm 70L is also divided into a pedal-side crank arm 74L and a hanger-side crank arm 76L, and one ends of the pedal-side crank arm 74L and the hanger-side crank arm 76L are slidably connected to each other. The mechanism is configured (FIG. 1 also shows an overview of the crank arms 70R and 70L).

  Hereinafter, the configuration of the crank arm 70R will be described. The description of the configuration of the crank arm 70L will be omitted because it can be obtained by replacing “R” with “L” below.

  For example, as shown in FIG. 9 (a), the pedal-side crank arm 74R and the hanger-side crank arm 76R are slidably connected to form a slide mechanism. There is a method in which 76R itself is processed in a stepped manner and slidably coupled with the sliding contact surfaces 74G and 76G being applied to each other.

  More specifically, in the form shown in FIG. 9 (a), the hanger side crank arm 76R has a thickness on one end side thinner than the thickness on the other end side, and the one side on the thin end side is slidably contacted. A shallow groove is formed in the sliding contact surface 76G.

  Similarly, the pedal-side crank arm 74R has a thickness on one end side thinner than that on the other end side, and the one surface on the thinner end side is defined as a sliding contact surface 74G. A protrusion (not shown) having a height approximately the same as the depth of the shallow groove of the hanger-side crank arm 76R and a width approximately the same as the width of the shallow groove is formed.

  With this configuration, the pedal-side crank arm 74R and the hanger-side crank arm 76R are in sliding contact with each other in a state in which the protrusion of the pedal-side crank arm 74R is engaged with the shallow groove of the hanger-side crank arm 76R. It becomes possible to slide in a state where 74G and 76G are applied.

  As another configuration of the slide mechanism, as shown in FIG. 9B, a crank arm connecting member 72R for connecting the pedal side crank arm 74R and the hanger side crank arm 76R is prepared, and this crank arm connecting member 72R is prepared. And a pedal-side crank arm 74R and a hanger-side crank arm 76R may be fitted to the crank arm connecting member 72R. The side hole 72A provided in the crank arm connecting member 72R shown in FIG. 9B is for absorbing the deflection of the crank arm connecting member 72R, but this is not always necessary.

In the slide mechanism formed by the pedal-side crank arm 74R and the hanger-side crank arm 76R shown in FIGS. 9 (a) and 9 (b), as a method of fixing the length of the crank arm (fixing the slide), a crank arm connection is possible. member 72R, the pedal side crank arm 74R, the hanger-side crank arm 76R, and a crank arm connecting member 72R each communicating holes 74H, _76H, 72H 1, the 72H ₂ provided, the communication hole 74H, _76H, to 72H 1, 72H ₂ A conceivable method is to connect and fix a connecting material (such as a quick release, a cam lever, or a bolt) 70B (and a washer 70D) as an operation unit of the adjusting means. When the crank arm connecting member 72R is used, two connecting materials, 70B ₁ and 70B ₂ (and washers 70D ₁ and 70D ₂ ), are required because the connecting material is required for both the pedal side and the hanger side.

Here, an example of the adjusting means and the operating portion that can adjust the length (crank length) of the slide mechanism is shown. The communication hole 74H of the pedal side crank arm 74R, the communication hole 76H of the hanger side crank arm 76R, or the crank At least one of the communication holes 72H of the arm connection member 72R (the communication hole 74H of the pedal-side crank arm 74R in FIG. 9A and the communication hole 72H ₁ of the crank arm connection member in FIG. 9B) is adjusted. As a long hole (a hole extending in the length direction of the member to be provided), and a connecting material as an operation portion of the adjusting means (in FIG. 9A, bolt 70B and washer 70D, FIG. 9B) position of the pedal side crank arm 74R and the hanger-side crank arm 76R at an arbitrary position in the elongated hole by the bolt 70B ₁ and washer 70D ₁₎ Leave to be able to fix the relationship. As the adjusting means, a plurality of communication holes arranged along the length direction of the pedal side crank arm 74R, the hanger side crank arm 76R, or the crank arm connecting member 72R may be used instead of the long hole.

Further, as shown in FIG. 9 (c), two deep holes 70C ₁ which are connected to each other in the cross section of the provided (hanger-side crank arm 76R in this case) the pedal side crank arm 74R and either of the hanger-side crank arm 76R The other bar (here, the pedal-side crank arm 74R) can be provided with _two bars 70C2 that fit into the holes, and can be used as a slide mechanism. In this case, as a method for fixing a slide, of the Yokowari 70C ₃ and the communicating hole 70C ₄ on the side disposed provided deep hole 70C _1, the communicating hole 70C ₄ by operating the coupling member 70B which communicates with the Yokowari 70C ₃ A method of fixing the _two bars 70C2 by tightening may be used.

  In addition, since the crank can withstand large stress and repeated fatigue with the pedaling force including the driving force and weight, if it is a bicycle that actually rides, the crank arm connecting member 72R and the connecting member 70B are originally required to be stronger than the crank arm. However, in the case of the bicycle frame measuring device as in the present invention, it merely straddles for measurement and does not pedal at full power, so that excessive torque is hardly generated. Therefore, since only the weight load needs to be taken into consideration, as shown in FIGS. 9A, 9B, and 9C, the crank arm connecting member 72R and the connecting member 70B can be made small and simple, and fixed. Even if there are one or two connecting members 70B on the hanger side and pedal side, sufficient strength can be obtained.

[Crank length adjustment method]
In order to determine the crank length using this bicycle frame size selection measuring device, the user can cross the device and check that the crank arm already installed is long enough for comfortable pedaling. If necessary, the connecting member 70B as the operation unit is operated to temporarily release the fixation of the slide mechanism, and the crank length is adjusted using a long hole as the adjusting means (by changing the fixing portion), and again Fix the slide mechanism. Thus, the crank length is finely adjusted, and the optimum crank length is determined with reference to the scale 70Rb provided on the pedal side crank arm 74R, the hanger side crank arm 76R, etc. (the adjustment on the 70L side is performed in the same manner).

  At this time, since the crank length can be adjusted only by operating the connecting member 70B, the crank length can be quickly adjusted without using a tool or the like.

(Measurement of handlebar width and handle stem protrusion dimensions)
Meanwhile, the bicycle frame size selection measuring device shown in FIG. 1 can maintain the horizontal state of the saddle 11 when adjusting the seat angle θ, and can also measure the handlebar width and the handle stem protrusion dimension. The configuration and measurement method for that purpose will be described below.

<Configuration for measurement of handlebar width and handle stem protrusion dimensions>
Looking at the configuration of the handle 16 at the top of the standing handle post 13 in FIG. 1, first, the lateral handle post 15, which is a lateral post to which the handle clamp 17 is fixed, is an operation portion provided on the standing handle post 13. The lateral handle post cam lever 15b is fitted so that the front and rear position can be adjusted. A handle stem protrusion scale 15a representing the protrusion dimension of the handle stem is attached to the side surface of the lateral handle post 15, and the scale closest to the operating portion exposed from the lateral handle post 15 represents the optimum handle stem protrusion dimension. Become.

  A left handle bar 16L and a right handle bar 16R are attached to the handle clamp 17, and the left and right handle bars 16L and 16R have handle portions 16Lb and 16Rb, respectively. The left and right handlebars 16L and 16R are attached to the hollow handle clamp 17 so that the distance from the handle clamp of the left and right handlebars 16L and 16R can be adjusted by sliding with respect to the handle clamp 17. The handle clamp 17 is provided with a left handle width scale 16La and a right handle width scale 16Ra indicating the positions of the left and right handlebars 16L, 16R.

<Handle bar width measurement method>
When measuring the width of the handlebar, the user straddles the measuring device for bicycle frame size selection. (For safety, it is desirable to get off the measuring device for each dimension adjustment, but there is no risk of falling or falling. Left and right handle width scales so that the handle widths are optimal (holding both arms parallel when viewed from the front) by gripping the handle portions 16Lb and 16Rb. 16La and 16Ra are adjusted to the same number to determine the width of the handlebar.

  The measurement of the handlebar width is preferably performed after the seat angle θ is determined.

<Handle stem protrusion measurement method>
Once the handlebar width is determined, the handle stem protrusion dimension is then measured.

  One of the crank arms 70L and 70R is positioned at an angle of 45 ° with respect to the ground (or base 1), and the user straddles the center of the saddle, and the handlebar handle portions 16Lb and 16Rb. Take a deep forward leaning posture with both arms bent so that the forearm is at an angle of about 30 ° with the ground, and the upper arm is vertical or the upper lower arm is slightly tilted forward (to the handle) The position of the handle post 15 is adjusted. At this time, the user's elbow and knee are just in contact with each other or slightly crossed (however, when aiming to run fast, the distance between the knee and elbow may be about 10 mm).

  When the position of the lateral handle post 15 can be adjusted appropriately, the value of the handle stem protrusion scale 15a is confirmed. The dimension obtained by subtracting the dimension of the top pipe 6 from this value is the optimum handle stem protrusion dimension.

[Matters common to the first to third embodiments]
As described above, by using the bicycle frame size selection measuring device of the present invention, the bicycle frame size can be selected in a shorter time and more easily than the conventional bicycle frame size selection measuring device.

  Further, the seat angle adjuster 20 is not limited to the above-described configuration, and may be configured such that the distance from the connecting portion 2M to the connecting portion 4M is changed by operating the angle operation portion. The first angle adjusting pipe 20i and the second angle adjusting pipe 20j are not used, but the seat angle adjuster 20 is configured in a folding manner in which the first angle adjusting pipe 20j and the second angle adjusting pipe 20j can be rotated with respect to each other. The distance from the part 2M to the connecting part 4M may be adjusted.

  Further, the seat angle adjuster 20 does not necessarily have to be arranged between the vertical pipe 2 and the front pipe 4. Between the two members of the base 1, the vertical pipe 2, the front pipe 4, and the top pipe 6. What is necessary is just to arrange | position so that a dimension can be adjusted.

  Further, since the saddle may be slightly tilted from the horizontal when going up and down the hill, the saddle receiving member 68 and the upper surface of the saddle seat 14 are provided to cope with such a case. By making the angle adjustable, it is possible to make the saddle 11 take a posture other than horizontal.

  Further, if the hanger portion 3 is provided with a spring or the like that provides resistance against pedal rotation, the frame size can be determined with the same feeling as when riding.

  The bicycle frame size selection measuring device of the present invention can be used when determining the frame sizes of various bicycles.

The perspective view of the measuring device for bicycle frame size selection concerning a 1st embodiment of the present invention. The side view which expanded the saddle posture maintenance link mechanism of the measuring device for bicycle frame size selection concerning a 1st embodiment of the present invention. (A) is a perspective view which shows the saddle receiving member used for the saddle attitude | position holding | maintenance link mechanism of the measuring apparatus for bicycle frame size selection which concerns on the 1st Embodiment of this invention, (b) is the saddle attitude | position holding link mechanism. The perspective view which shows the decomposition | disassembly state of the attachment member used, (c) is a perspective view which shows the attachment state to the top pipe of the attachment member used for the saddle attitude | position holding | maintenance link mechanism. (A) And (b) is a perspective view which shows the attachment location of the spring used for the saddle attitude | position holding | maintenance link mechanism of the measuring apparatus for bicycle frame size selection which concerns on the 1st Embodiment of this invention, respectively. (A) is a perspective view which shows the structure of the saddle support means used for the measuring apparatus for bicycle frame size selection which concerns on the 1st Embodiment of this invention, (b) is side sectional drawing which shows the structure of the same saddle support means (Vb-Vb sectional view taken along line (a)) The side view which expanded the connection structure of the measuring device for bicycle frame size selection concerning a 2nd embodiment of the present invention. The figure which shows the general form of another form of the connection structure of the measuring apparatus for bicycle frame size selection which concerns on the 2nd Embodiment of this invention. (A) And (b) is a figure which shows the general form of another form of the connection structure of the measuring apparatus for bicycle frame size selection which concerns on the 2nd Embodiment of this invention, respectively. (A), (b), (c) is a perspective view which shows the structure around the crank arm of the measuring apparatus for bicycle frame size selection which concerns on the 3rd Embodiment of this invention, respectively. Side view showing a conventional measuring apparatus for bicycle frame size selection A perspective view showing a conventional bicycle frame size selection measuring device with adjustable seat angle Figure used to explain the operation of the seat angle adjuster of the conventional bicycle frame size selection measuring device with adjustable seat angle

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Standing pipe 3 Hanger part 4 Front pipe 6 Top pipe 10 Seat post 11 Saddle 13 Standing handle post 20 Seat angle adjuster 30 Saddle support means 60 Saddle attitude maintenance link mechanism 70L Crank arm 70R Crank arm 90 Connection structure

Claims (6)

A bicycle frame size selection measuring device that determines a bicycle frame size according to a user,
The base,
A front support member having a lower end rotatably connected to a front portion of the base;
A rear support member having a hanger part rotatably connected to the rear part of the base and pivotally supporting a pedal crank;
An upper connecting member that rotatably connects the upper part of the front support member and the upper part of the rear support member;
A front post in which a lower part is fitted to the front support member so that the vertical position can be adjusted, and a handle is attached to the upper part;
A rear post in which a lower part is fitted to the rear support member so that the vertical position can be adjusted;
With
The base, the front support member, the rear support member, and the upper connection member constitute a parallel link mechanism that supports the upper connection member in parallel to the base.
Two members among the members constituting the parallel link mechanism are connected to each other, and the dimensions between the two connected members can be adjusted, and the dimensions between the two connected members can be adjusted with the base. An angle adjusting means for adjusting an angle formed by the rear support member is provided;
A saddle support means that supports a saddle having a riding seat with respect to the rear post and is rotatable with respect to the rear post is provided,
A bicycle frame characterized in that a saddle posture holding mechanism for supporting the saddle is interposed between the upper connecting member and the saddle so that the upper connecting member and the upper surface of the saddle are parallel to each other. Measuring device for size selection. Saddle posture holding mechanism
A first parallel link mechanism comprising an intermediate link member that operates parallel to the upper connecting member;
A second parallel link mechanism in which a saddle receiving member fixed to the saddle operates in parallel with the intermediate link member;
The bicycle frame size selection measuring device according to claim 1, further comprising: Two link members that intersect each other and are pivotably connected to each other at the intersection are used as one link set.
Saddle posture holding mechanism
Comprising a connecting structure composed of one or more link sets;
In this connection structure, the end portion on the upper connection member side, the end portion on the saddle receiving member side fixed to the saddle, and the connection portion of each link set are connected so that the crossing angle of each link set can be changed. The bicycle frame size selection measuring device according to claim 1, wherein the measuring device is a connecting structure. Saddle support means
A rear post side mounting body attached to the upper part of the rear post;
A saddle side mounting body attached to the saddle;
A saddle coupling body that can be tilted when viewed from the side, with the horizontal axis along the lateral direction as the center;
The bicycle frame size selection according to any one of claims 1 to 3, further comprising: a posture fixing body that fixes a posture of the saddle side mounting body with respect to the rear post side mounting body. Measuring device. The saddle includes a saddle seat that serves as a passenger seat, and a saddle frame that is supported by the rear post by a saddle support means and supports the saddle seat,
Saddle support means
A rear post upper body whose upper surface is formed in a curved shape, has a communication hole, and is fixed to the upper portion of the rear post;
A lower frame receiving member that is disposed above the rear post upper body and has a curved shape portion that is in sliding contact with the curved shape of the rear post upper body on the lower surface;
An upper frame receiving member that is disposed above the lower frame receiving member, has a curved portion on the upper surface, and has a long hole formed in the front-rear direction;
An angle determining member that is disposed above the upper frame receiving member, and whose lower surface has a shape that is in sliding contact with the curved shape portion of the upper surface of the upper frame receiving member;
A connecting member that communicates with the communication hole of the rear post upper body, the elongated hole of the lower frame receiving member, and the elongated hole of the upper frame receiving member, and is coupled to the angle determining member;
With
The saddle frame is sandwiched between the lower frame receiving member and the upper frame receiving member,
4. The clamping force for clamping the saddle frame by the lower frame receiving member and the upper frame receiving member can be adjusted by operating the connecting member. 5. Measuring device for bicycle frame size selection. The crank arm of the crank that is pivotally supported by the hanger part
It is divided into a pedal side crank arm and a hanger side crank arm.
The slide mechanism is configured so that the pedal side crank arm and the hanger side crank arm can slide with each other,
The bicycle frame size selecting device according to any one of claims 1 to 5, further comprising an adjusting means for adjusting a length of the slide mechanism and an operating portion of the adjusting means. measuring device.

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