JPS6329665Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a bicycle seat post.

The following types of seat posts for motocross bicycles used for riding in mountains and forests are known. That is, the upper part is bent horizontally,
It is known that reinforcing rods in the form of braces were passed between the upper and lower parts. This conventional seat post had the following drawbacks. In other words, because the gap between the mutually opposing post-holding edges of the saddle fixing loop clip is narrow, the reinforcing rod, which is thicker than the gap, gets in the way, and the reinforcing rod goes beyond the fixed part to the side of the bent part of the seat post. The disadvantage was that the loop clip could not be moved, and therefore the front and rear positions of the saddle could not be adjusted over a wide range. In order to solve this problem, it may be possible to increase the gap between the post-holding edges, but doing so has the disadvantage that the gripping force of the seat post by the loop clip becomes weaker.

The purpose of this invention is to eliminate the above-mentioned drawbacks by giving the reinforcing rod a special shape.

This invention will be explained below based on embodiments shown in the drawings.

As shown in Fig. 1, a seat post 2 is fitted into a vertical pipe 1 of the bicycle body so as to be vertically movable. It has a shaped upper part 5. A reinforcing rod 2 is installed between the lower part 3 and the upper part 5.
2 was given and fixed. The part 3a of the lower part 3 that is tightened and fixed to the vertical pipe 1 by the seat post fixing loop clip 6 (hereinafter referred to as the tightening fixing part 3a)
As clearly shown in FIG. 3, a fine recess 7 for preventing slipping is formed on the outer periphery of the shaft by knurling or the like. In addition, the tightening fixing part 3a
A reinforcing rib 8 having an arbitrary cross-sectional shape, such as a negative or positive cross-sectional shape, is fitted inside the upper portion thereof. The loop clip 6 is a known fastener 9.
It is designed so that it can be tightened, and loosened when adjusting the height of the seat post 2.

A fine recess 7' for preventing slipping is also formed in the upper part 5 of the seat post 2. A loop clip 10 for fixing the saddle is fitted into this upper part 5,
This loop clip 10 has a pair of hanging walls 12 having a through hole 11, and a post holding edge 13 is formed on the hanging walls 12 so as to rise laterally. A through hole 14 is provided on each outer side of the hanging wall 12,
A pair of clamping washers 16 and 17 having a diameter of 15 are applied, a tightening bolt 18 is fitted into these through holes 14 and 15 and the through hole 11 of the hanging wall 12, and nuts 19 are screwed into both ends of the bolt 18. At the same time as tightening the loop clip 10, the clamping washer 1
6 and 17, the spring support body 20 can be clamped and fixed. Spring support 2
0 has a saddle 21 attached to it. The fixing structure of the saddle 21 as described above is known.

As shown in FIG. 2, a narrow portion 23 (including the small diameter portion) has a width narrower than the gap H between the post holding edges 13, 13 of the loop clip 10, and has a height that does not touch the lower ends of the holding edges 13, 13. ) is formed by pressing or stretching the upper part of the reinforcing rod 22. With this structure, the loop clip 10
The bent portion 4 extends beyond the fixed portion of the reinforcing rod 22.
You can move to the side of Needless to say, at this time, the tightening bolt 18 must be removed once.

As described above, according to this invention, since the narrow portion 23 is formed at the upper part of the reinforcing rod 22, the loop clip 10 can be held at the portion where the reinforcing rod 22 is fixed without weakening the holding force of the loop clip 10. It can be moved beyond. Therefore, the position of the saddle 21 in the longitudinal direction can be adjusted over a wide range. Moreover, since the reinforcing rod 22 is not made thin as a whole, but only a part thereof is made narrow, the original function of the reinforcing rod 22 is not impaired.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
FIG. 1 is a side view of a partially fractured main part, FIG. 2 is an enlarged sectional view taken along the line of FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line of FIG. 1. 2... Seat post, 3... Lower part of seat post 2, 5... Upper part of seat post 3, 10... Saddle fixing loop clip, 13... Post holding edge, 22... Reinforcement bar, 23... Narrow part, H... gap.

Claims (1)

[Scope of utility model registration request] In a bicycle seat post in which the upper part 5 is bent horizontally and a reinforcing bar 22 in the form of a brace is passed between the upper part 5 and the lower part 3, the post holding edge 13 of the loop clip 10 for fixing the saddle is used. , 13 and has a width narrower than the gap H between the post holding edges 13, 13.
The narrow part 23 of the height that does not touch the lower end of the reinforcing rod 2
Bicycle seat post formed on the top of 2.