JPS5836708A - Spike pin for car tire - Google Patents

Abstract

PURPOSE:To reduce wear of the paved road surface and improve effect of braking and the like by projecting the head of a spike pin in stairs-like shape. CONSTITUTION:The head of a pin 1 is projected in a stairs-like shape 31-33 with its periphery b1-b3 located along the spherical surface. Such a structure excludes those parts which wear the road surface through their circular motion on it and contribute to reduce damage to the paved road surface.

Description

DETAILED DESCRIPTION OF THE INVENTION With the remarkable spread of automobiles in recent years, collisions and other accidents due to skids are occurring frequently, especially during periods of ice and snow or during rain. In order to prevent these accidents, so-called spiked tires have been developed, but conventional spike pins for automobile tires cause serious wear and tear on paved roads and road markings. In addition to the poor dash effect and the risk of skidding, some types of spike pins also had drawbacks such as being easy to break or difficult to attach.

The present invention eliminates the above-mentioned drawbacks, has a strong braking effect and forward force on ice and snow, eliminates the risk of skidding, and causes far less damage to the paved road surface than before, and is also capable of damaging itself. To provide an excellent spike pin for automobile tires that is difficult to attach and easy to attach. An example of implementing the present invention will be described below with reference to the accompanying drawings.

As shown in the first front view, the spike pin (hereinafter simply referred to as a bottle) 1 of the present invention has a top wall 2 at the head end 2.
From approximately the center of the top wall 2. A step body a in the shape of a substantially circular ring, disk, cylinder, cylinder, etc., which gradually increases in size, is provided protruding toward the direction. In the figure, this staircase body 1 is temporarily assumed to be an upper staircase 31.
(small), middle stairs 3. (middle), lower stairs 3. The example shows three (large) stairs, but it is possible to have a slightly larger number of stairs than this. However, each staircase 3.3.3.
The surface connecting the peripheral edges of each protruding (overhanging) edge of the top wall 2. As shown by the broken line in FIG. 1, it is arranged so that it can almost form a part of a spherically curved convex surface. Each staircase 3m
3.3. Around the protruding (overhanging) edge of b, b, #
:i In FIG. 1, it is shown as having a substantially right angle shape when viewed from the side, but it can be curved as appropriate. The side peripheral wall C of each staircase 3.3.3s can be provided vertically. Moreover, each side peripheral wall C is a top wall 2. It is also possible to have a sloped shape.

The surface of the step body a and other desired parts are made of cemented carbide. For convenience, illustration of a flange-like portion (7 flange) generally provided near the tail end of the bottle 10 is omitted.

The spike bottle I of the present invention is mounted from the tread of a tire into the rubber layer with the head end 2 side exposed as desired, as in the conventional example. Installation is easy as it is the same as before.

Some conventional spike pins gradually wear out on one or both sides of the head end during use, for example, when viewed from the side, it becomes almost the first.
The result will be as shown by the broken line in the figure. Until then, the E had worn out the pavement significantly.

From the beginning, the present invention has focused on each peripheral area of the staircase body a as shown in the first diagram.
Since the line connecting blb3 has a substantially circular shape in the front and back when viewed from the side, the paved road surface is not severely abraded as in the conventional case. That is, the bottom wall 5 of the tail end 4 of the bottle 1 rotates as the tire rotates.
#1 is centered at the center of #1, and in order to repeat a slight arcuate movement back and forth between the grounding point of bottle l, we have removed the part that should be moved at the right angle corner in front and rear of it in the side view, so that is all. Less damage to the paved road surface.

The stair case a of the present invention has a vertical side peripheral wall C, etc. compared to a simple hemispherical one, so it has a higher braking and dashing effect and has the effect of preventing skidding.

For convenience, the bottle l is illustrated as a single unit, but it has a double structure of an outer cylinder body and an inner shaft body like some commercially available products, and the above-mentioned wall is attached to the top wall of the shaft head of the inner shaft body. The stair body a can be provided in a protruding manner.

[Brief explanation of drawings]

FIG. 1 is a front view of the spike bin for automobile tires of the present invention;
FIG. 2 is a bottom view of the object shown in FIG. 1, looking in the direction of the person. 1-spike pin 2-head end 2. - cephalic apical wall 3, 3.
3. - Stairs 4 - Tail end 5 - Tail end bottom wall a - Stair body
blb, b, - Stairs surrounding patent applicant Satoshi Takayama Yubal

Claims (1)

[Claims] On the top wall of the end of the bottle, an annular staircase is protruded from the center to the top wall. A spike pin for an automobile tire, characterized in that the spike pin is arranged so as to form a part of the.