JPH0615815Y2 - Bicycle handle post fixing device - Google Patents

Description

[Technical Field of the Invention] The present invention relates to a fixing device for a bicycle handle post, and in particular, a handle wedge is provided on a lower side of the handle post, and a handle rod and a front fork pipe are fixed by screwing a pulling rod. It relates to a structure that is firmly fixed.

2. Description of the Related Art Conventional handle posts and front fork pipes are fastened by inserting a pull-up rod (23) from above the handle post tube body (21) as shown in FIG. To the inclined surface (22) with the pipe (2
The compression wedge (30) having the same sloped surface (22a) corresponding to the lower end surface of (1) is connected, and the screw of the pulling rod (23) and the compression wedge (30) are connected by rotationally tightening the pulling rod (23). 3
The compression wedge (30) is axially compressed by a nut provided on the lower side of (0), so that the compression wedge (30) slides along the inclined surface (22a) and is laterally biased to the outer periphery of the compression wedge (30). Surface is crimped to the inner wall of the front fork pipe (13), and the reaction causes the tubular body (21).
The outer peripheral surface of the above was crimped to the inner peripheral wall on the opposite side of the front fork pipe (13) to fix the handle post tubular body (21) and the front fork pipe (13).

Problems to be solved by the invention The above, the lower end surface of the pipe body (21) has a slope, and correspondingly, the compression wedge (30) also has the same slope in the upper end surface in the forward and reverse directions, By tightening the lifting rod (23), the compression wedge (3
0) and slide along these opposite slopes while biasing in the lateral direction, so that the outer peripheral surface of the compression wedge (30) is attached to the front fork pipe.
While crimping to one side inner peripheral wall of (13), the outer peripheral surface of the slanted end of the tubular body (21) is also moved laterally by its reaction, and crimping to the opposite side inner peripheral wall of the front fork pipe (13), The handle post pipe (21) and the front fork pipe (13) were fixed, but the upper end of the pipe (21) was pivotally mounted by the rotary bearing provided on the head pipe, whereas The lower end surface of the body (21) and the upper end surface of the compression wedge (30) incline opposite to each other and slide backward, so that the pulling rod (23) is deviated from the correct axial direction, and the opposite sides are opposed to each other. The outer peripheral surface of the tube is crimped to the inner wall of the front fork pipe (13), and the compression wedge (30) crimped to the tube body (21) loosens due to a sudden momentary vibration, and the tube body (21) and then the handle. It can also cause post upset.

In addition, the bias angle may change depending on the tightening of the pulling rod (23), which shows different tightening directions with respect to the upper end of the tubular body (21), and the handle post also tilts to some extent. The handle post fixed to the upper part of the bicycle also tilts to some extent, which causes a visual difference in the skeleton of the bicycle and the turning angle of the handle.

Further, in order to eliminate or reduce the problem caused by the deviation from the axial direction, when the handle post is accurately positioned, first, the tube body (21) and the compression wedge (30) are placed in the correct relative azimuth position. After holding it, tighten the pull-up rod (23) and be careful not to change the relative relationship during this work, and accurate positioning is very difficult. Cause

The present invention is intended to solve these problems,
Firmly and securely connect the front fork pipe and the handle post to reduce the looseness and excessive deviation of the axis line,
An object of the present invention is to provide a fixing device for a bicycle handle post that can be easily positioned during assembly and mounting.

Means for Solving the Problems To achieve the above object, in the present invention, the lower end surface of the tubular body of the handle post is formed as an inclined end surface having a certain inclination rate with respect to the axial center line, and its lower coaxial direction. The compression wedge having the same inclination rate as this and the inclined lower end surface and the inclined end surfaces that are inclined in opposite directions to each other is engaged with the compression wedge by the pulling rod, and the space between them is It is characterized by interposing a fixed wedge whose both end parts are inclined in opposite directions and tightening the screw part of the pulling rod so that the compression wedge and the fixed wedge are pressed against and fixed to the inner wall of the front fork pipe. To do.

Action Both end faces between the inclined end face of the lower end of the tubular body in the handle post and the inclined end face of the compression wedge which is engaged therewith by the pulling rod and opposes the inclined end face at the same inclination rate and in the opposite direction. Providing fixed wedges inclined in opposite directions,
When the compression wedge compresses the fixed wedge in the upper axial direction by tightening the threaded portion of the pulling rod, the lower end surface of the pipe body and the fixed wedge, and the fixed wedge and the compression wedge move relative to each other along the inclined end surfaces that are in contact with each other. The handle post and the front fork pipe are fixed by bringing the outer peripheral surface portion into pressure contact with the inner wall of the front fork pipe by the radial movement component at that time. Further, since the fixed wedge and the compression wedge move in parallel in the radial direction, the deviation of the axial center lines of the tube body and the pulling rod is reduced. That is, it is possible to fix the front fork pipe and the handle post while keeping the center lines in a straight line. Also, the fixed wedge is different from the compression wedge and the tubular body.
Since the shaft center line moves in parallel, the contact area between the fixed wedge and the compression wedge on the inner peripheral wall surface of the front fork pipe increases, the pressure contact effect is strengthened, and the tightening of the pulling rod can be saved.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments with reference to the drawings.

Example In this example, the front fork pipe (13) is
Inside the head pipe (11) at the tip of the bicycle frame (10),
The rotary bearings (1
It is gripped via 2).

The present invention relates to a fixing device for attaching a handle post (20) to a front fork pipe (13) of a bicycle, which generally includes a handle post (20) having a lower end inserted by a certain length and a compression wedge (30). ), A fixed wedge (40), and a pulling rod (23) (see FIG. 1).

The handle post (20) is inserted into the front fork pipe (13) with an appropriate length at the lower end of the pipe body (21), and the lower end surface of the pipe body (21) is cut obliquely. , An inclined surface (22) having a certain inclination with respect to the axis, into which a pulling rod (23) having an appropriate length is inserted, and
A threaded portion (24) is provided at a lower portion of the pulling rod (23), and is extended from the inclined surface (22) to the outside.
A handle (25) for steering control is fixed to the upper portion of the pipe body (21).

The compression wedges (30) are provided at appropriate distances on the axial center line of the pipe body (21), and the end faces on the opposite side are inclined surfaces (22) of the pipe body (21).
Corresponding to, an inclined surface (31) having the same inclination rate and having a reverse inclination is formed, and the other end surface (35) of the lower portion has an end surface in a direction orthogonal to the axis, and is relatively high on one end side of the diameter The outer peripheral surface (32) is formed. A round hole (33) is bored at the center of the compression wedge (30) so that the threaded portion (24) of the pulling rod (23) can be passed through the nut, and the nut provided integrally on the end face (35). The compression wedge (30) can be moved upward by screwing with (34).

The fixing wedge (40) (see FIG. 2) is formed by the tube body (21) and the compression wedge (30).
, The main body (41) of which has a hollow cylindrical shape,
A pulling rod (23) is passed through the hollow lumen,
The upper and lower end surfaces of the main body (41) are adjacent to the lower end surface of the tubular body (21) and the upper end surface of the compression wedge (30), respectively, and have the same inclination rate and diagonally cut in opposite directions corresponding to each other. End face (4
2) and (43).

In assembling the above-mentioned structure, first, the handle (25) is fixed to the upper end of the tubular body (21) of the handle post (20), and the pulling rod (23) is inserted into the tubular body (21) to pull it up. Attach the threaded portion (24) provided on the lower part of the rod (23) to the lower end surface of the tubular body (21).
It is exposed from (22), and then the fixing wedge (40) and the compression wedge (30) are inserted into the pull-up rod (23) in order, and the nut () is attached to the threaded portion (24) of the pull-up rod (23). Screw on 34). For screwing operation, first, fix the fixed wedge (40) to the pulling rod (2
Swirl about the axis of 3), the inclined both end surfaces (42), (43) are the inclined surface (22) of the lower end of the tubular body (20) and the inclined end surface (31) of the compression wedge (30), respectively. After making contact with each of the end faces by inclining them, insert them into the front fork pipe (13) from the upper side to the lower side, and further rotate the handle post (20) so that the handle (25) is in the correct direction. After adjusting the rotation, turn the pulling rod (23) from the upper head part. As a result, the compression wedge (30) is moved upward, the lower inclined end surface (43) of the fixing wedge (40) is pressed by the upper inclined end surface (31), the fixing wedge (40) is raised, and the screwing operation is further performed. Continuing, as the fixed wedge (40) rises, the inclined both end faces (42) and (43) of the fixed wedge (40) become the tubular body (21).
The lower slanted end face (22) and the upper slanted end face (31) of the compression wedge (30) are pressed against each other and slidably moved, and as a result, the fixed wedge (4
(0) is projected laterally with respect to the tubular body (21) by the radial component of the sliding movement, and the circumferential surface (32) of the compression wedge (30) and the circumferential surface (44) of the fixed wedge (40) are The handle posts (20) can be fixed by press-contacting the inner walls of the front fork pipes (13), respectively.

Effect of the Invention The bicycle handle post of the present invention constructed as described above
The fixing device of (20) includes a compression wedge (30) which is linked to the lower end surface (22) of the tubular body (21) of the handle post (20) on the same extension line of the axial center by a pulling rod (23). The upper end face (31) and the upper end face (31) are formed as inclined end faces that are opposite to each other at a certain inclination rate, and are formed in a substantially wedge-shaped space between the two in an opposite direction. ) And (43) are fixed wedges (40) which are coaxially provided, and these are tightened by the screw of the pulling rod (23), and the compression wedge (30) is pulled up and raised to make an interview. While pressing the fixed wedge (40) through the inclined end surface (31) and moving upward together, the compression wedge (30) and the fixed wedge (40) move up and down on the respective sliding surfaces, that is, the inclined end surface (31) and ( 43) and (42) and (22) move laterally relative to each other, fixed by being pressed against the inner wall of the front fork pipe (13), and fixed wedge (40) and compression wedge (30). Is parallel to the axis Since it is moving, the movement of the axial center line of the pipe body (21) is reduced, that is, there is a possibility that the front fork pipe (13) and the center line of the handle post (20) are kept straight and fixed. Therefore, for the rider of the bicycle, there is no large visual difference in the rotation angle of the handle of the bicycle from the angle of the handle of the bicycle, and the precise adjustment of the handle post (20) is easy, which facilitates assembly and repair. It has a feature that it does not require time and effort, and both the upper and lower inclined end faces (42), (4) of the fixing wedge (40).
In 3), the slanted end surface (22) of the lower part of the pipe body (21) and the slanted end face (31) of the compression wedge (30) constitute a wide contact area, and due to the sliding resistance, the pipe body (21) and the fixed wedge (31) are fixed. It is possible to enhance the pressure contact effect between the compression wedge (30) and the inner wall of the front fork pipe (13) of the compression wedge (30), and thus to save the tightening of the pulling rod (23).

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a fixing device near a bicycle handle post of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part of a fixing wedge and a compression wedge for explaining a fixing device of a bicycle handle post of the present invention. FIG. 1 is an enlarged cross-sectional view showing a configuration example of a conventional bicycle handle post fixing device and a wedge portion. In the figure, (10) is a bicycle frame, (11) is a head pipe, (12) is a rotary bearing, (13) is a front fork pipe,
(20) is a handle post, (21) is a tube, (22) is an inclined surface, (2
3) is a lifting rod, (24) is a threaded portion, (25) is a handle,
(30) is a compression wedge, (31) is an inclined surface, (32) is a circumferential surface, (33) is a round hole, (34) is a nut, (35) is an end surface, (40) is a fixed wedge, (41) ) Is a main body, (42) and (43) are inclined end surfaces, and (44) is a circumferential surface.

Claims (1)

[Scope of utility model registration request] 1. A lower end surface of a tubular body of a handle post is formed at an inclined end surface having a certain inclination rate with respect to an axial center line and has the same inclination rate in the downward coaxial direction. And a compression wedge provided with inclined end surfaces that are inclined in opposite directions to each other by a pulling rod, and between the tube body and the compression wedge,
Both ends are tilted in the opposite direction and fixed wedges are provided on the inclined end faces that are in contact with the inclined inclined end faces, and the compression wedges are pressed against the inner wall of the front fork pipe by tightening the screw part of the pulling rod. A device for fixing a bicycle handle post, which is characterized by being fixed by.