JPH0594086U - Tightening bolt mechanism for fixing the seat part of the bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] Use the tightening bolt mechanism for fixing the seat part of the bicycle without damaging the paint of the standing pipe, tightening band, and back stay.
Prevents deterioration of appearance due to rust on anti-rotation metal fittings and bolt heads, reduces the number of parts on the bicycle assembly line to improve parts management and workability, and allows the user to adjust saddle height easily and quickly To be able to do it. [Structure] Fastening for fixing a bicycle seat, in which a nut 5 with a lever 6 is screwed into a bolt 4 which can be inserted into a lateral hole of an ear portion 3 of a fastening band 2 fixed to an upper portion of a standing pipe 1. In the bolt mechanism, a detent member 8 is integrated with the head portion 7 of the bolt 4 by combining the detent member 8 with the detent member 8.
Is a synthetic resin material having strength and weather resistance, and is a T-shaped groove portion 14 that can be laterally engaged with the bolt head portion 7, or a hexagonal concave portion that can be engaged in a cap shape, a retaining projection 10, and a back. A side edge portion 13 that can be engaged with the side edge of the flat portion 12 near the upper portion of the stay 11 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fastening bolt mechanism for fixing a seat portion of a bicycle, and in particular, a screw type fastening with a nut is characterized by a means for preventing corotation of the bolt.

[0002]

[Prior Art]

 In general, the above-mentioned screw type fastening bolt mechanism for fixing the seat portion is fitted with a tightening band with a lateral hole on the outer periphery of the upper end portion with the split groove of the vertical pipe into which the seat post is inserted. The bolt of the tightening bolt mechanism is inserted into the above, and the nut with the lever is screwed to the bolt [for example, page 1018 of Bicycle Practical Handbook 4th edition (edited and published by Japan Bicycle Industry Promotion Association).・ See page 1019). This involves rotating the nut with a lever, pulling the ears with a bolt, and reducing the diameter of the vertical pipe at the split groove, and tightening and fixing the inner seat post.

In the tightening bolt mechanism for fixing the seat portion, the nut is rotated when the bicycle is assembled and the saddle height is adjusted, but it is necessary to prevent the bolt from rotating in order to prevent the bolt from rotating together. In the past, the bolt side was locked with a wrench and tightened, but it took time. Therefore, a protrusion is formed on the neck of the bolt on the prismatic portion or on the bottom of the neck, and a lateral hole in the ear of the tightening band is formed with a notch for engagement with the square hole or protrusion, and the bolt is attached to the band. It was locked to prevent co-rotation.

However, if the tightening band is fitted on the standing pipe after painting, scratches will be applied to the painting, so that the fastening band has recently been fitted and fixed on the standing pipe before painting. In this case, since the tightening band is manufactured and attached separately from the bolt, it is necessary to use compatible general purpose products for the tightening band and the bolt. It became impossible to use bolts with protrusions on them, or tightening bands with square holes or notches in the side holes of the ears.

On the other hand, the work of tightening by matching the prismatic portion and the projection of the bolt neck portion with the square hole and the notch of the tightening band is performed by a user when adjusting the saddle height, regardless of the skilled worker. It was a little difficult, and sometimes uncertain tightening could cause problems.

Therefore, recently, as a means for preventing the co-rotation of the bolts, many ones are used by fitting a rotation stopper metal fitting 18 as shown in FIG. The detent metal 18 is formed by pressing an iron plate into a round hole 19 that can be fitted into the bolt 4, a pair of ear pieces 20 that can hold the bolt head 7 from both sides, and a pair of ear pieces 20. On the opposite side of the piece 20, a pair of ear pieces 21 capable of sandwiching the flattened portion 12 of the back stay 11 on both sides is formed.

In order to tighten and fix the seat post with the tightening bolt mechanism for fixing the seat portion using the anti-rotation metal member 18, first, as shown in FIG. 10, the anti-rotation metal member 18 is fitted to the head 7 side of the bolt 4. Then, the bolt 4 is inserted into the lateral hole of the ear portion 3 of the tightening band 2. Next, the ear pieces 20 on the bolt head 7 side of the anti-rotation metal fitting 18 clamp the bolt head 7 from both sides, and the other ear piece 21 clamps the flattened portion 12 of the backstay 11 from both sides. While maintaining this state, the nut 5 is screwed into the bolt 4, and the lever 5 is rotated by the lever 6 to be tightened.

[0008]

[Problems to be solved by the device]

 However, the fastening bolt mechanism for fixing the seat portion using the above-mentioned rotation stopper metal fitting 18 has the following problems. First, since the anti-rotation metal fitting 18 tightens the tightening band 2 which is previously fitted and fixed to the vertical pipe 1 as described above, the paint of the vertical pipe 1 is not damaged, but the anti-rotation metal fitting 18 is tightened. This will damage the coating of the band 2 and the back stay 11.

Further, since the anti-rotation metal fitting 18 is made of an iron plate, it is likely to be rusted in a relatively short period of time together with the exposed bolt head 4 when exposed to wind and rain. The appearance of rust even in a part is unattractive and reduces the commercial value of the entire bicycle.

Further, the anti-rotation metal fitting 18 is separate from the bolt 4, and the anti-rotation metal fitting 18 is fitted to the bolt 4 as described above on the bicycle assembly line, and the ear piece 2 on the bolt head 7 side. After the head 7 is clamped from both sides at 0, it is necessary to clamp the flat portion 12 near the upper part of the back stay 11 from both sides by the other ear piece 21. Therefore, part management is troublesome, and this work takes an unexpectedly long time, resulting in poor work efficiency.

The present invention is intended to solve the problems of the conventional fastening bolt mechanism for fixing a seat portion of a bicycle. That is, the purpose of the present invention is not to damage the paint of the tightening band and the back stay as well as the standing pipe, and to prevent the deterioration of the appearance due to the rust of the anti-rotation metal fittings and the bolt head, and to improve the appearance on the bicycle assembly line (EN) It is possible to provide a tightening bolt mechanism for fixing a seat portion of a bicycle, in which the number of parts of the bicycle can be reduced to improve management of parts and workability, and a user can easily and quickly adjust the saddle height.

[0012]

[Means for Solving the Problems]

 A The first of the fastening bolt mechanism for fixing the seat of the bicycle according to the present invention is to attach the lever 6 to the bolt 4 that can be inserted into the lateral hole of the ear portion 3 of the fastening band 2 fixed to the upper portion of the standing pipe 1. In the tightening bolt mechanism for fixing the seat of the bicycle, which is made by screwing the nut 5 of

The head 7 of the bolt 4 is integrated with a detent member 8 and the detent member 8 is a synthetic resin material having strength and weather resistance. A T-shaped groove portion 14 that is engageable and has a back inner side surface 15 that can lock the rotation of the head portion 7, a lateral retaining protrusion 10 on an inner edge portion of the T-shaped groove portion 14, and a back step. (A) A side edge portion 13 of the flat portion 12 of the upper portion of the blade 11 which can be engaged is provided (see FIGS. 1 to 3).

B The second of the fastening bolt mechanism for fixing the seat of the bicycle according to the present invention is the bolt 4 which can be inserted into the lateral hole of the ear 3 of the fastening band 2 fixed to the upper portion of the standing pipe 1. In the tightening bolt mechanism for fixing the seat of the bicycle, which is formed by screwing the nut 5 with the lever 6,

The head 7 of the bolt 4 is integrated with a detent member 8 and the detent member 8 is a synthetic resin material having strength and weather resistance. Hexagonal recesses 9 that can be engaged in a circular shape, projections 10 for preventing axial disengagement in the peripheral portion of the hexagonal recesses 9, and side edges that can be locked by the side edges of the flattened portions 12 of the backstay 11 toward the top And 13 (see FIGS. 4 to 6).

In both the first and second embodiments, the rotation stopping member 8 is already integrated with the bolt head 7 before coming to the bicycle assembly line. In the figure, 16 indicates a seat post.

[0017]

[Action]

 1) First, in the bicycle assembly on the assembly line, with the seat post 16 inserted in the standing pipe 1, insert the seat post 16 into the lateral hole of the ear portion 3 of the tightening band 2 that is fitted and fixed to the standing pipe 1. The bolt 4 of the seat fixing tightening bolt mechanism according to the present invention is inserted, and the nut 5 is screwed. After that, the side edge portion 13 of the anti-rotation member 8 which is integrated with the head portion 7 of the bolt 4 is hooked on the flat portion 12 of the back stay 11 near the upper portion, and the nut 5 is turned by the lever 6. Just move it and tighten it.

When the nut 5 is rotated and tightened, the bolt head 7 has a hexagonal recess 9 of the rotation preventing member 8 or a T-shaped groove portion having an inner depth side surface 15 with which the bolt head 7 can be hooked. Since the bolts 4 and 14 are respectively integrated with each other, the bolt 4 does not rotate idly with the detent member 8. On the other side, the detent member 8 is hooked on the flat portion 12 of the backstay 11 at the side edge 13 thereof, so that the detent member 8 also does not idle. Therefore, the tightening band 2 is tightened and the seat pipe 16 is fixed without the bolt 4 idling during the above tightening.

As described above, when the work is carried out on the bicycle assembly line, the detent member 8 is integrated with the bolt head portion 7, so that the detent member can be fitted to the bolt as in the conventional case. Since the ear pieces do not require the bolt heads to be clamped, the work is simple and can be performed easily and quickly even by a non-skilled operator. This is the same when the user adjusts the saddle height, and the saddle height can be adjusted easily and quickly.

2) On the other hand, in the seat fixing tightening bolt mechanism according to the present invention, since the detent member 8 integrated with the bolt head 7 is made of weather-resistant synthetic resin, Rust does not occur on the stopper member 8 itself. Further, since the anti-rotation member 8 covers the bolt head 7, the bolt head 7 is unlikely to rust, and even if rusted, the rust portion cannot be seen and the appearance does not deteriorate.

3) In addition, the anti-rotation member 8 and the bolt 4 have an axial slip-out preventing projection 10 formed in the peripheral portion of the hexagonal recess 9 with which the bolt head 7 is fitted, and a T-shaped groove portion 14. The protrusions 10 formed on the inner edge of the side wall for preventing the side walls from coming off prevent accidental removal.

[0022]

【Example】

 1 to 3 show a first fastening bolt mechanism for fixing a seat of a bicycle according to the present invention. The anti-rotation member 8 integrated with the bolt head 7 is made of a synthetic resin material having strength and weather resistance, for example, 66 nylon of polyamide resin, and is attached to the head 7 of the bolt from the side. And a T-shaped groove portion 14 having a rear inner side surface 15 capable of engaging with the head portion 7, a protrusion 10 for preventing slippage, which is provided with a notch 22 laterally on an inner edge portion of the T-shaped groove portion 14, and a back. A side edge portion 13 that can be hooked at a side edge of the flat portion 12 near the upper portion of the stay 11 is formed.

FIGS. 4 to 6 show a second example of a fastening bolt mechanism for fixing a seat of a bicycle according to the present invention. The anti-rotation member 8 integrated with the bolt head 7 is made of, for example, 66 nylon of polyamide resin as a synthetic resin material having strength and weather resistance, and can be engaged with the bolt head 7 in a cap shape. A hexagonal concave portion 9, a projection 10 for preventing axial disengagement in the peripheral portion of the hexagonal concave portion 9, and a side edge portion 13 that can be hooked by a side edge of a flattened portion 12 of the backstay 11 near the upper portion are formed. ing.

It should be noted that, although different from the above-mentioned embodiment, as shown in FIGS. 7 and 8, the anti-rotation member 8 is a hexagonal recess 9 which can be cap-shaped with the bolt head 7, and the hexagonal recess 9 It may be formed so as to have a protrusion 10 for retaining in the axial direction in the peripheral portion thereof and a curved arm portion 17 which is fitted inside the flat portion 12 closer to the upper portion of the backstay 11. In the detent member 8, the arm portion 17 is rotated to be hooked on the flat portion 12 near the upper portion.

Although the manufacturing means is different from the above, in order to unify the detent member 8 with the bolt head 7, the detent member 8 is inserted into the bolt head 7 during injection molding. It is also conceivable to integrally form them every other time. Of course, the material of the rotation preventing member 8 is not limited to polyamide resin 66 nylon, for example.

[0026]

[Effect of the device]

 As is apparent from the above, the bicycle seat fastening tightening bolt mechanism according to the present invention has the following advantages over the conventional tightening bolt mechanism of this type.

1) The seat post can be tightened and fixed without damaging not only the standing pipe but also the paint of the tightening band and the back stay. That is, in the conventional anti-rotation metal fitting, the anti-rotation metal fitting damaged the paint of the tightening band and the back stay when tightening the bolt. However, in the present invention, since the anti-rotation member is made of synthetic resin, the seat post can be fastened and fixed without damaging the paint of the fastening band and the back station.

2) It is possible to prevent the appearance of the entire bicycle from being deteriorated by making it difficult for rust to occur and making it difficult to see. That is, since the conventional anti-rotation metal fittings are made of iron, rusting occurs in a relatively short period of time when exposed to wind and rain, and a part of the rusting deteriorates the appearance of the entire bicycle and reduces the commercial value.

On the other hand, in the present invention, since the detent member is made of synthetic resin, the detent member itself does not rust, and the detent member is crowned with the bolt head. Even if it gets rusty, even if it gets rusted, it can be prevented that the rust is not visible due to the covering of the rotation preventing member, and some rust will make the entire bicycle unattractive and reduce the product value.

3) The number of parts on the bicycle assembly line can be reduced, parts management can be facilitated, workability can be improved, and the user can easily and quickly adjust the saddle height. Immediately, in this type of conventional tightening bolt mechanism, the anti-rotation metal fittings and the bolts are separate, so it is necessary to engage the anti-rotation metal fittings with the bolts on the assembly line or to prevent both sides of the bolt head from rotating. It was necessary to pinch it with the ear pieces of the metal fittings, which was troublesome for parts management and assembly work.

However, in the present invention, the bolt and the detent member are preliminarily integrated with each other. Therefore, management of parts on the assembly line becomes easy, and even an unskilled person can easily assemble and improve workability. This is the same when the user adjusts the height of the saddle, and the adjustment work can be performed easily and quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a detent member used in a fastening bolt mechanism for fixing a seat of a bicycle according to the present invention.

FIG. 2 is a perspective view of a fastening bolt mechanism for fixing a seat of a bicycle according to the present invention using the detent member shown in FIG.

FIG. 3 is a perspective view showing a state in which the detent member shown in FIG. 1 is integrated with a bolt.

FIG. 4 is a perspective view showing a second embodiment of the detent member used in the fastening bolt mechanism for fixing the seat of the bicycle according to the present invention.

5 is a perspective view of a fastening bolt mechanism for fixing a seat of a bicycle according to the present invention, which uses the detent member shown in FIG.

FIG. 6 is a perspective view of the detent member shown in FIG. 4 integrated with a bolt.

FIG. 7 is a perspective view of a detent member according to another embodiment.

8 is a perspective view of a tightening bolt mechanism for fixing a seat of a bicycle using the detent member shown in FIG.

FIG. 9 is a perspective view of a detent metal fitting used in a conventional seat fastening tightening bolt mechanism of a bicycle.

10 is a perspective view of a tightening bolt mechanism for fixing a seat of a bicycle, which uses the anti-rotation metal fitting shown in FIG.

[Explanation of symbols]

1-Standing pipe 2-Tightening band
3-Ear 4-Bolt 5-Nut
6-lever 7-head 8-rotation stop member
9-Hexagonal recess 10-Protrusion 11-Backstay
12-flat portion 13-side edge portion 14-T-shaped groove portion
15-back inner side 16-seat post 17-arm
18-Rotation stop fitting 19-Round hole 20-Ear piece
21-Earpiece 22-Notch

Claims (2)

[Scope of utility model registration request] 1. A tightening band 2 fixed to an upper portion of a standing pipe 1.
In a tightening bolt mechanism for fixing a seat of a bicycle, in which a nut 5 with a lever 6 is screwed into a bolt 4 which can be inserted into a lateral hole of an ear portion 3 of the bicycle, a head member 7 of the bolt 4 is provided with a rotation stopping member. 8 is integrated and integrated, and the detent member 8 is a synthetic resin material having strength and weather resistance, which can be laterally engaged with the bolt head 7 and locks the rotation of the head 7. A T-shaped groove portion 14 having a possible inner rear side surface 15 and a protrusion 1 for preventing sideward slippage at the inner edge of the T-shaped groove portion
0 and a side edge portion 13 that can be hooked at the side edge of the flattened portion 12 of the back stay 11 near the upper portion of the back stay 11. 2. A tightening band 2 fixed to an upper portion of a standing pipe 1.
In a tightening bolt mechanism for fixing a seat of a bicycle, in which a nut 5 with a lever 6 is screwed into a bolt 4 which can be inserted into a lateral hole of an ear portion 3 of the bicycle, a head member 7 of the bolt 4 is provided with a rotation stopping member. The anti-rotation member 8 is made of a synthetic resin material having strength and weather resistance and can be engaged with the bolt head 7 in a cap-like shape.
And a hexagonal recess 9 around which a protrusion 10 for retaining in the axial direction and a side edge 13 which can be hooked by the side edge of the flattened portion 12 of the backstay 11 are provided. Tightening bolt mechanism for fixing the seat part of.