JPS61200010A - Spike tire - Google Patents

Abstract

PURPOSE:To prevent damage to road surface and dust pollution by embedding an air bag and a retractable spike pin in a tread and making said spike pin project out and retracted by supplying and discharging pressure air to and from said air bag. CONSTITUTION:Air is pressed into an air bag 11 from an unshown air filling tube, inflating the air bag 11 and, thereby, pressing the flange 22 of a spike pin 21 to make a pin part 23 project out from the tread surface 24 of tire. Thereby, a tire functions as a spike tire. When air in the air bag 11 is removed by opening an unshown valve, the flange 22 is inwardly pushed back by the pressing force of the projected part 20 of a recessed part 15 for housing the spike pin 21, making the spike pin 23 retracted into the tread surface 24 enabling the tire to function as a normal tire. Due to this construction, the spike can be projected out for use only when necessary, preventing damage to road surface and dust pollution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a spiked tire for an automobile, and particularly to a spiked tire in which spikes can be freely inserted and removed as needed.

(Prior Art) When driving a car on a snowy or frozen road in a cold region, chains are wrapped around the tires or snow tires or spiked tires are used to prevent slipping on the road surface.

Spiked tires are tires with spikes made of special super-hard alloy embedded in the tread of the tire, and have recently been used in cold regions such as the Tohoku region and Hokkaido due to their convenience and safety.

(Problems with the Prior Art) Although conventional spiked tires have excellent safety in terms of slip prevention, they have the following problems.

That is, replacing a car tire is not only troublesome but also time consuming, and cannot be done easily at any time. Therefore, once the spiked tires are installed, they are not replaced every time depending on the road condition, and during the winter, the spiked tires are used even on roads that have been cleared of snow or are normal roads that are not frozen. in this way,
Driving with spiked tires has the problem that the spikes destroy the normal road surface and scrape off road signs.

In addition, in large cities, roads are well maintained even during the winter by removing snow and installing snow-melting equipment, but until you get into the city, the snow is not removed or melted, so spiked tires are necessary. However, since the spiked tires are not replaced only when driving in urban areas, dust scraped by the spiked tires is generated. Cleaning up this dust not only costs a lot of money, but also poses a major pollution problem that harms the health of residents living along the railway lines.

(Objective of the Invention) This invention has been made in view of the above points, and is capable of freely inserting and removing spikes embedded in the tread anytime and anywhere, and can be used as a spiked tire on snowy or frozen roads, or as a normal tire on normal roads. The purpose of the present invention is to provide a spiked tire that can also be used as a tire.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. That is, an air bag that presses the flange portion of the spike and a connecting tube that connects the air bag are embedded in a large number of air bag storage recesses and tube grooves provided inside the tread, and one of the air bags One is buried in the side wall and connected by an air tube with a valve attached to the protruding end. Further, the air bladder can be inflated within the recess by compressed air from the valve, and when the air bladder is inflated, the tip of the pin portion of the spike protrudes from the tread surface.

A pin insertion hole that penetrates the tread is formed in the recess, into which the pin of the spike is inserted so as to be freely retractable, and an elastic member is provided on the bottom of the recess to press the flange of the spike inward. They are arranged integrally or independently, and are configured such that when the air bag expands, the tip of the pin part protrudes from the tread surface against the elastic member in the recess.

(Example) Hereinafter, this invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a cross-sectional view showing an example of the present invention, FIG. 2 is an explanatory perspective view, and FIG. 3 is an explanatory partially exploded view showing a state in which an air bag and a tube are connected.

1 is a carcass made of laminated sugre cloth, 2 is a tread formed of rubber on the carcass, 3 is a breaker of a buffer zone between carcass 1 and tread 2, 4 is a side wall, 5 is a tube, 6 is a tube Valve, 7 is bead part,
8 is a rim 7 lunge attached to the bead portion 7.

Reference numeral 11 denotes a disk-shaped air bag for suppressing spikes, and the air bags 11 are connected by a connecting tube 12 to communicate with each other. Furthermore, an air tube 14 is connected to one of the air bags 11, and one end of the air tube 14 is buried in the sidewall 4, and the tip protrudes toward the rim 7 lantern 8 side. A valve 13 is attached. The serious tube 14 is buried in the side wall 4, but the thickened part 17 is used to hold the valve 13.
is formed (see Figure 2). In order to adjust the balance of the tire caused by attaching the thickened portion 17 and the valve 13, an adjustment portion 18 is provided on the sidewall 4 on the opposite side of the valve 13.

Further, the air bag 11 and the connecting tube 12 are buried in a recess 15 and a tube groove 16 formed between the carcass 1 and the tread 2, that is, on the tread 2 side,
The air bags 11 and the recesses 15 in which they are buried are arranged around the entire periphery of the tread 2 depending on the required number of spikes to be implanted and the mounting positions. The recess 15 communicates with the tube groove 16, and a semi-circular protrusion 20 is integrally formed on the bottom surface, and functions as an elastic member for pressing the implanted spike 21 toward the air bag 11. Furthermore, a pin insertion hole 25 for a spike that penetrates the tread surface 24 is bored in the recess 15 .

Reference numeral 21 denotes a T-shaped spike made of a special super hard alloy, and the spike 21 consists of a flange portion 22 and a pin portion 23. The flange portion 22 is held between the air bag 11 and the protruding portion 20 within the recess 15, and a protection plate 26 for protecting the air bag 11 is fixed to the contact surface with the air bag 11. The pin 11Fls23 of the spike 21 is inserted into the pin insertion hole 25 so as to be freely advanced and retracted, and the tip thereof is configured to protrude from the tread surface 24 when the air bag 11 is inflated.

Note that in the above configuration, the protrusion 20 in the recess 15 is not limited to the embodiment, and may have any shape as long as it presses the flange 22 of the spike 21 inward. In place of the section 20, another elastic member may be attached. In addition, a protection plate 26 fixed to the flange portion 22
This is to prevent the air bag 11 from being damaged due to the friction that occurs when the spikes 21 move forward and backward, and therefore may be omitted as appropriate. Otherwise, unless the gist of this invention is changed,
Other modifications and changes are possible.

Next, in order to manufacture the tire according to the above configuration, first, the carcass 1 and the tread 2 having the recesses 15 and tube grooves 16 formed on the inner surface are separately molded, and then the pin portions 23 of the spikes 21 are molded. The spike 21 is implanted in the recess by inserting it into the pin insertion hole 25, and then the air bag 11, the connecting tube 12, and the inflation tube 14 are implanted in the recess 15 and the tube groove 16, respectively.
After that, the outer surface of the carcass 1 and the inner surface of the tread 2 may be fixed together.

Next, the method of using this invention will be explained in detail.

First, when using it as a spiked tire, pressurize air through the valve 13 of the air tube 14 and put it into the air bag 1.
Expand 1. At this time, it is preferable that the air pressure inside the air bag 11 be the same as the air pressure inside the tube 5. When the air bladder 11 expands, the pin portion 23 of the spike 21 is pushed out against the pressing force of the protruding portion 20, causing the tip of the pin portion 23 to protrude from the tread surface 24 (FIG. 4).

Since the air pressure in the air bag 11 is kept almost the same as that in the tube 5, it will not easily retract even if it touches the road (it can reliably function as a spike. Air is injected using gasoline. You can do it on a stand, but you can easily do it anywhere by putting a high-pressure air pump in your car.

When the tire is driven as a normal tire with the spikes retracted, the valve 13 may be opened and the spikes 21 may be retracted. That is, when the air is let out, the air pressure in the air bag 11 is reduced to almost zero. When the pressure inside the air gR11 is reduced, the flange portion 22 is pressed inward by the pressing force of the protruding portion 20, and at the same time, the tip of the pin portion 23 is flush with the tread surface 24 or retracts inwardly, so that it becomes a spike 21. doesn't work. Therefore, if you let the air out when you drive on a normal road from a snowy road, you can use it as a normal tire.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the spikes can be moved freely forward and backward anywhere by expanding and deflating the air bladder, so when driving on snowy or frozen roads, the spikes can It functions as a tire, and when driving on a normal road that has been cleared of snow, it functions as a normal tire.8! can be made to function.

Therefore, it is possible to use different tires depending on the road conditions without changing tires, ensuring safe driving and solving problems of road surface destruction and dust pollution.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a sectional view and FIG.
The figure is a partially perspective view for explanation, the tjr13 figure is a developed view for explanation,
Figure 4 is a partially enlarged sectional view with the spikes protruding.
FIG. 5 is a partially enlarged sectional view with the spikes retracted. 11 is an air bag, 12 is a connecting tube, 13 is a valve 1
4 is an air tube, 15 is a recess, 16 is a tube groove, 20 is a protrusion, 21 is a spike, 22 is a flange, 23 is a pin, 24 is a tread, 25 is a pin insertion hole, 2
6 is a protection plate

Claims (1)

[Claims] An air bag that presses the flange of the spike and a connecting tube that connects the air bag are embedded in a number of air bag storage recesses and tube grooves provided inside the tread, and one of the air bags is The air bladder is connected by an air tube embedded in the sidewall and having a valve attached to the protruding end, and the air bladder can be inflated within the recess by compressed air from the valve, and the recess has a tread surface. A pin insertion hole is drilled through the recess, into which the pin of the spike is inserted so that it can move forward and backward, and an elastic member that presses the flange of the spike inward is attached to the bottom of the recess, either integrally or independently. A spike tire, characterized in that the tips of the pin parts protrude from the tread surface against the elastic member in the recessed part by the expansion of the air bladder.