JP2563380Y2 - Bicycle handle device - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention relates to a bicycle handle device that prevents rattle of a handle post.

(Prior Art) Conventionally, as a top structure of a bicycle handle device, a fork stem is mounted in a cylindrical head pipe, a handle post is mounted in the fork stem, and a lower end portion is further pulled in the handle post. Insert the pull-up bar with the upper light,
On the other hand, an annular bowl member is provided at an upper end and a lower end of the head pipe, an upper ball pressing member and a lower ball pressing member are mounted on the fork stem, and the annular bowl member, the upper ball pressing member and the lower ball pressing member are provided. It is known that a steel ball is interposed between them, and a fastening member is attached to the fork stem of the upper ball pressing member.

In the above structure, to attach and fix the handle,
The lifting rod attached to the lower end of the lifting rod is extended by a lifting rod, and this is fixed to the inside of the fork stem, but the recently mounted object such as a shopping basket is supported at the rotation center position of the fork stem. Can also improve the stability of the bicycle,
Further, the handle post is often completely lowered or used in a state close to the handle post because the handle operation can be easily performed.

(Problems to be solved by the invention) However, in this case, the base at the top of the handle post is directly connected to the fork stem via a fastening member or the like,
There is a drawback in that the vibration of the fork stem or the head pipe is transmitted directly to the handle post during running of the bicycle, causing rattling of the handle post.

As a method of preventing rattling of the handle post, a skirt in which a rotating tool can be engaged between the upper ball pressing member and the base of the handle post, and a plurality of split grooves extending in the axial direction from the lower end are formed. And a structure in which a cap nut with a fastening means is interposed is known (Japanese Utility Model Publication No. Sho 62-30556).
This structure is effective in firmly fixing the handle post to the fork stem, but the mechanism becomes complicated, and the use of the above-mentioned cap nut increases production costs. is there.

Therefore, an object of the present invention is to propose a handle device which exhibits a sufficient effect for preventing rattling of a handle post and can be manufactured at low cost.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, a fork stem is inserted into a head pipe, a handle post is inserted into the fork stem, and an upper end of the head pipe is provided. An annular bowl-shaped member is provided at each lower end, and an upper ball pressing member and a lower ball pressing member are mounted on the fork stem, and a steel ball is provided between the annular bowl member, the upper ball pressing member, and the lower ball pressing member. Further, in a bicycle handle device in which a fastening member is attached to the fork stem on the upper ball pushing member, a lock nut is attached to the fork stem on the fastening member, and The present invention proposes a bicycle handle device in which a tapered surface for locking the lock nut is formed on a lower edge portion.

(Operation) That is, when vibration is applied during the running of the bicycle, the components of the handle device are slightly deformed. However, in the structure of the conventional handle device as shown in FIG. Since the elastic members are not brought into surface contact and elastically tightened, the above-mentioned minute deformation causes rattling.

On the other hand, in the present invention, a lock nut is attached to the fork stem, and a lower end of the handle post head is formed with a tapered surface for locking the edge of the nut. By pressing the lock nut downward, the edge of the lock nut can be cut into the tapered surface and fixed as shown in FIG.

By making the edge of the lock nut bite into the tapered surface formed on the lower edge of the handle post head,
As described above, rattling can be reliably prevented even if the components of the steering wheel device are minutely deformed due to the vibration during the running of the bicycle.

Further, since the present invention is constituted by the lock nut and the tapered surface formed on the lower edge of the handle post head, it can be manufactured at extremely low cost.

(Embodiment) Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

1 is a handle device according to the present invention, 2 is a head pipe, and a fork stem 3 having a threaded portion at an upper part and a lower part is inserted into the head pipe 2. Reference numeral 4 denotes a handle post comprising a handle post head 4a and a post portion 4b suspended from the head 4a. A pull-up rod 5 having a thread at its lower end is inserted into the post portion 4b. Further, a conical lifting light 6 is screwed into the screw portion.

An annular bowl member 7 is provided at the upper end and the lower end of the head pipe 2.
And an upper ball pressing member 9 and a lower ball pressing member 10 are screwed into the threaded portion of the fork stem 3 so as to be provided between the annular bowl member 7 and the upper ball pressing member 9 and between the annular bowl member 8 and the lower ball pressing member. A steel ball 11 is interposed between the pressing members 10. A head bearing cover 12 is screwed onto the threaded portion of the fork stem 3, and a fastening member including a middle nut 13 and a washer 14 is further screwed on.

On the other hand, 15 is a lock nut. The lock nut 15 is screwed onto the screw portion of the fork stem 3 from above the washer 14, and further, a tapered surface for locking the lock nut 15 to the lower edge of the handle post head 4a.
Form 16.

When the handle post 4 is pushed down to the lowest position in the above configuration, the tapered surface 16 formed on the lower edge of the head 4a is locked by the lock nut 15. Therefore, the handle post 4 is securely locked at the lowest position, and the vibration from the head pipe 2 and the fork stem 3 can be reliably absorbed.

(Effects of the Invention) In summary, according to the invention, it is possible to provide a bicycle handle device that can prevent rattle of the handle post with an extremely simple structure.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view of the handle device of the same in an exploded form, and FIG. FIG. 4 is a partial sectional view showing a conventional example. In the figure, 1 is a handle device, 2 is a head post, 3 is a fork stem, 4 is a handle post, 7 and 8 are annular bowl members, 9 is an upper ball pressing member, 10 is a lower ball pressing member, 13 is a middle nut,
14 is a washer, 15 is a lock nut, and 16 is a tapered surface formed on the lower edge of the handle post head.

Claims (1)

(57) [Scope of request for utility model registration] 1. A fork stem is inserted into a head pipe,
A handle post is inserted into the fork stem, and an annular bowl member is provided at each of an upper end and a lower end of the head pipe. An upper ball pressing member and a lower ball pressing member are mounted on the fork stem, and the annular bowl is mounted. A steel ball is interposed between the member, the upper ball pressing member and the lower ball pressing member, and further, the fork stem on the upper ball pressing member is provided with a fastening member mounted on the bicycle handle device. A conical pull-down chair screwed to the lower end of the upper rod is projected from the lower end of the handle post, and the pull-up rod is fixed in the handle post by pulling-up operation of the pull-up rod. Attach a lock nut to the fork stem on the fastening member, form a tapered surface at the lower edge of the handle post head, and push down the handle post to the lowest position to remove the edge of the lock nut. Bicycle handle device being characterized in that as engaged by bite into the tapered surface.