JPS581361Y2 - wheel spoke nipples - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved nipple used for fixing spokes for a wheel such as a motorcycle to a rim.

Conventionally, in order to fix the wheel spokes of a motorcycle or the like (hereinafter simply referred to as a car) to the rim, one end was locked to the hub flange of the wheel (as shown in Figs. 1 and 2). Insert the threaded other end of the spoke 1 into the through hole 4 drilled in the center of the drop 3 of the rim 2, and insert the head 5 into the tire 9.
It is screwed into and fixed to a threaded through hole 8 of a nipple 7 which is inserted through the trunk 6 with its side facing.

When the tube 10 is attached to the rim 2, in order to avoid damage to the tube 10 by the head 5 of the nipple 7, etc.
A flap rubber 11 is interposed between the tube 10 and the entire circumference of the rim drop portion.

In such a conventional fixing method, the nipple 7 gradually loosens due to vibrations while the vehicle is running, causing wheel shake, etc., making stable driving impossible.

Therefore, nipple 7 may be damaged periodically or when vibration occurs.
Although this retightening may seem easy at first glance, it is difficult to center it and requires considerable skill.Additionally, repeating this process may cause damage to nipple 7 and spoke 1. There is also the risk of damaging the threads quickly.

The present invention uses a nipple that has one or two or more blocking parts at required locations on the surface of the head with a shape that does not damage the flap rubber and tube (hereinafter referred to as tube, etc.). This is an attempt to eliminate the shortcomings.

In FIG. 3 showing an embodiment of the present invention, 12 is a head 1
3. Blocking parts 14 consisting of hemispherical protrusions arranged at equal intervals on the surface of the nipple to prevent damage to the tube etc. are installed in several stages.
5 is the body of the nipple 12, 16 is the screwed nipple 12
This is a through hole.

As shown in FIG. 4, the nipple 12 is constructed in the same way as a conventional nipple by inserting the body 15 into the through hole 4 of the drop 3 of the rim 2 from the tire 9 side, and locking one end to the hub flange of the wheel. The threaded other end of the spoke 1 is screwed together and fixed through the through hole 16.

Next, a flap rubber 11 is attached to the rim 2, and then a tube 10 and a tire 9 are attached.

In this case, the air forced into the tube 10 presses the flap rubber 11 against the surface of the head 13 of the nipple 12.
The blocking portion 14 on the surface of the head 13 bites into the flap rubber 11 and prevents the nipple 12 from returning to rotation, which is caused by vibrations applied to the nipple 12 and the spokes 1 while the car is running. , to prevent nipple loosening.

The number of steps and man-hours involved in manufacturing the nipple 12 and assembling the wheel are no different from conventional ones.

In FIG. 5 showing another embodiment of the present invention, 1γ is the head 1
8 A nipple equipped with four blocking parts 19 consisting of radial steps arranged at equal intervals on the surface and lowered on the opposite side to the direction of the tightening force of the spokes 1; 20 is the body of the nipple 17; 21 is a threaded part; This is the through hole of the nipple 17.

The nipple 17 is used in the same way as in the first embodiment, by inserting the trunk 20 into the through hole 4 of the drop 3 and screwing the spoke 1 and the nipple 17 together through the through hole 21.

The effect of the blocking part 19 in this case is that of the blocking part 1 of one embodiment.
It is the same as 4.

Although the four blocking parts 14 and 19 are provided at equal intervals in the above embodiment and other embodiments, the function can be achieved even if the blocking parts 14 and 19 are not necessarily arranged at equal intervals. The number may be one or two or more except four.

Further, although the blocking portion 14 in the embodiment is a hemispherical protrusion, it may be of any other shape as long as it bites into the flap rubber without damaging the tube or the like.

Although the blocking portion 19 in the other embodiments is a radial stepped portion, it is not necessarily radial and may be cut in the middle, a ratchet-like stepped portion, or a concave groove into which the flap rubber can be bitten. good.

Furthermore, if slits or knurls are formed on the contact surface of the flap rubber drop, the effectiveness of the blocking parts 14 and 19 of the nipples 12 and 17 can be further increased.

The present invention is a nipple for a wheel spoke, etc., which is characterized by having a blocking part on the head surface with a shape that bites into one or more flap rubbers without damaging them to prevent them from loosening. be effective.

(1) Since the nipple loosening during driving is completely eliminated, there is no occurrence of vehicle shake, etc., and safe driving is possible.

(2) Since the manufacture and assembly of the nipple is no different from the conventional method, it can be supplied without placing any burden on the customer.

[Brief explanation of drawings]

Figure 1 shows a conventional nipple, A is a front view, the mouth is a top view,
C is an A-A vertical sectional view, FIG. 2 is a cross-sectional view of the main parts to explain the assembly of a conventional wheel, FIG. 3 is an embodiment of the present invention, A is a front view, and the mouth is a plan view. C is a B-B longitudinal cross-sectional view;
Fig. 4 is a sectional view of the main parts to explain the assembly of the wheel of one embodiment, Fig. 5 is another embodiment of the present invention, where A is a front view, the mouth is a plan view, and C is a longitudinal section along C-C. It is a front view. 12.17...Nipple, 13.18...
...head, 14.19...blocking part.

Claims (1)

[Scope of utility model registration request] A nipple for a spoke for a wheel, characterized in that the head surface is provided with a blocking part having a shape that bites into one or more flap rubber without damaging it to prevent loosening.