JPS5948749B2 - Filled tire manufacturing method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a filled tire in which the tire is filled with an elastic material such as polyurethane.

Urethane-filled tires are generally manufactured by injecting a liquid puncture-preventing filler made of polyurethane or the like into an air chamber of a tire filled with air to a constant pressure while replacing the air with air.

Most of these fillers are used in tube-equipped truck and bus tires, but recently, tubeless tires have also been proposed that are filled with the above-mentioned filler.

The problem with manufacturing such filled tires is the provision of holes to evacuate the air to replace the liquid filler, which, according to traditional manufacturing methods, would be located on the outside of the tire tread. The tire is drilled so as to penetrate from the tire air chamber to the tire air chamber, and measures are taken to close it again after filling with liquid filler.

In the case of tires with tubes, these air vent holes are made by drilling holes in both the tire and tube at the same time after bonding the inner surface of the tire and the outer surface of the tube with adhesive. If adhesive is not used, after drilling a hole, an exhaust pipe is provided in the hole so as to pass inside and out.

However, with these conventional methods, the former requires a troublesome process of bonding the tire and tube, and the latter often causes the tube to tear when drilling because it is not bonded. It happens.

Moreover, the biggest problem is that as the through-holes are provided in the tread as mentioned above, the tire reinforcing layer may be damaged due to this penetrating work, or water may enter through the through-holes during use, leading to the lifespan of the tire. This means that the

Particularly when the tire reinforcing layer is made of steel cord, this will lead to rusting and will further shorten the life of the tire.

It is an object of the present invention to overcome the above-mentioned conventional problems and to improve productivity by eliminating much of the labor and time associated with perforating the tire tread, and to improve productivity by eliminating the large amount of labor and time associated with perforating the tire tread. It is an object of the present invention to provide a method and apparatus for manufacturing a filled tire that does not cause a reduction in service life.

The method for manufacturing a filled tire of the present invention that achieves the above object includes:
A filling valve that communicates with the air chamber of the tire mounted on the wheel rim is provided through the wheel rim, and the filling valve is inserted through the exhaust pipe so that the opening at its tip faces the inner peripheral surface of the tire, With the tire standing upright so that the tip opening of the exhaust pipe is located at the top of the air chamber, a liquid filler is injected into the air chamber from the filling valve, and the air in the air chamber is pumped through the exhaust pipe. When the liquid filling material overflows from the exhaust pipe, the injection of the liquid filling material is temporarily stopped.Then, the exhaust pipe is pulled out from the filling valve and its insertion hole is closed, and then the filling valve is closed again. This method is characterized by injecting more liquid filler into the tire until it reaches a specified internal pressure, and then hardening the liquid filler in the tire.

In addition, the filling tire manufacturing apparatus of the present invention which achieves the above object has a liquid filling material in the opening of a two-day connector that is removably installed in a filling valve that communicates with the air chamber of a tire mounted on a wheel rim. The injection pipe is removably connected to the connector, and the other end is connected to an exhaust pipe that passes through the connector and the filling valve, the tip opening of which faces the top of the air chamber, and the rear end opening located outside the air chamber. The present invention is characterized in that a plug is removably inserted into the exhaust pipe and closes the insertion port of the exhaust pipe when the exhaust pipe is removed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing an apparatus for carrying out the present invention, and FIG. 2 is a schematic diagram showing a piping system in the same apparatus.

In the figure, 1 is a tire used for trucks, buses, light trucks, etc., and is normally installed on a wheel rim 3 with a tube. Correspondingly, annular gaskets 2, 2 are interposed between the flanges on both sides of the wheel rim 3 and installed to maintain airtightness.

The wheel rim 3 is a wide, flat-bottomed rim used for trucks, buses, light trucks, etc., and is provided with a detachably divided side ring 3a on its side.

The flat bottom of the wheel rim 3 is provided with an opening consisting of an elongated hole 3b, and a patch 4 with a filling valve 5 attached thereto is adhered to the elongated hole 3b so as to seal the air chamber of the tire 1. I am trying to communicate between the inside and outside of 6.

This filling valve 5 has a larger diameter (8 to 1
2), which is straight and has no bends.

To attach the tire 1 to the wheel rim 3, first remove the side ring 3a, insert one side of the annular packing 2 into the wheel rim 3, and then completely insert both bead parts 1a of the tire 1 into the cylindrical flat bottom part. After that, another annular gasket 2 located on the side ring 3a side is inserted, and then the side ring 3a is attached.

Next, in order to ensure the fit between the tire 1 and the wheel rim 3, air is forced in from the filling valve 5.

A 20 connector 8 is detachably attached to the outer end of the filling valve 5 via a cock 7.

One opening 8a of the two-day connector 8 is in linear communication with the filling valve 5, and an exhaust pipe 10 is inserted into this opening 8a so that it passes through the filling valve 5 via an exhaust pipe receiver 9. is inserted into.

The exhaust pipe 10 is inserted in a removable manner, and when inserted, its tip opening 10a reaches the inner wall surface of the tire 1, which is the top of the air chamber 6, and its outer end opening 10b communicates with the outside of the air chamber 6. In addition, a plug 11 is detachably provided so as to close the insertion hole when the exhaust pipe 10 is removed.

Since the exhaust pipe receiver 9 has a built-in 01J ring, the liquid filler will not leak from between the exhaust pipe receiver 9 and the exhaust pipe 10.

20 connector 8 has a union 12 in the other opening 8b.
is attached, and is connected via the union 12 to a liquid filler filling device (not shown) by a hose 13.

As shown in FIG. 2, the outer end opening 10b of the exhaust pipe 10 is
- It is connected to an overflow receiver 15 via a hose 14, and a pressure gauge 16 and a relief valve 17 are further connected to the rear of the overflow receiver 15 and communicated with the outside air.

Now, manufacturing a filled tire using the apparatus assembled as described above is carried out as follows.

After the tire 1 is assembled onto the wheel rim 3 as described above, the tire is set upright so that the receiving valve 5 is at the uppermost position.

Attach the cock 7 and the 20 connector 8 to the end of the filling valve 5 in such an upright state; or, when assembling the tire to the rim, install the cock 7 and the 20 connector 8 at the same time, and then set the tire upright. The process may be such that

After attaching the cock 7 and the 2-day connector 8 to the filling valve 5, connect the exhaust pipe 1 from the lower end of the opening 8a of the 2-day connector 8.
0, and as soon as the tip opening 10a reaches the top of the air chamber 6, push it in. At the same time, the union 1 is inserted into the opening 8b.
2 to connect the hose 13 of the liquid filling device.

A hose 14 connected to an overflow receiver 15, a relief valve 17, etc. is connected to the outer end opening 10b of the exhaust pipe 10 by mounting.

After completing the above preparations, the filling device is then operated to inject the liquid filler 18 into the air chamber 6 of the tire 1 via the 20 connector 8 and the filling valve 5.

The liquid filler 18 is filled from below into the air chamber 6 by gravity, while air is exhausted from the tip opening 10a of the exhaust pipe 10 through the outer end opening 10b, replacing it with air.

Therefore, once the air chamber 6 is filled with the liquid filler 18, the liquid filler 18 begins to be discharged from the exhaust pipe 10, and the filling device is temporarily stopped at this point.

The overflow receiver 15 connected by the hose 14 is
The relief valve 17 is useful for preventing the overflow of the liquid filling material from contaminating the working environment, and the relief valve 17 adjusts the internal pressure of the air chamber to be kept constant according to its set pressure. Useful for stabilizing material injection.

In particular, as mentioned above, when filling a tire with a tube with liquid filler rather than a tubeless tire, the air chamber inside the tube is kept at a constant pressure to keep the tube in close contact with the inner wall of the tire at all times. Therefore, it is useful.

When the air chamber 6 is filled with the liquid filler 18 and the filling device is stopped, the hose 14 is removed from the exhaust pipe 10, and the air remaining in the tire air chamber is shaken back and forth and from side to side to completely fill the exhaust pipe 10. is discharged from the outer end opening 10b.

Next, the exhaust pipe 10 is pulled out from the 2-day connector 8 and the filling valve 5, and at the same time, the insertion hole provided in the exhaust pipe receiver 9 is closed with the plug 11.

Then, the filling device is operated again to pressurize the liquid filler into the air chamber 6 until the filling pressure into the air chamber 6 reaches a predetermined pressure.

When the filling pressure of the liquid filling material reaches a predetermined pressure, the operation of the filling device is stopped, the cock 7 is closed, and the sets after the 2nd connector 8 are removed.

The tire that has been filled with the liquid filler in this way is then transferred to a curing chamber and treated at room temperature or under heating to harden the liquid filler inside the tire to obtain a filled tire.

Although the embodiments described above describe the production of filled tires for tubeless tires, they can be implemented similarly for tires with tubes.

In the case of a tire with a tube, the outer end opening 10 of the exhaust pipe 10
It is desirable to install a relief valve 17 to b.

According to the method and apparatus for manufacturing a filled tire described above, there is no need to drill through holes in the tread for air release as in the conventional method, and therefore the tire is not used as a pretreatment for providing such through holes. There are no problems such as the need for adhesion between the tube and the tube, or the tearing of the tube that occurs when such adhesion is not performed, and the work time is about half that of the conventional method.

That is, the conventional method would require 2 hours, but the above method can do it in 40 to 50 minutes.

Furthermore, since there are no through holes in the tread, there will be no damage to the tire reinforcing layer, or deterioration of the tire reinforcing layer due to water entering through the through holes during tire use, and there will be no reduction in tire life. .

As described above, the method and apparatus for manufacturing a filled tire of the present invention include inserting an exhaust pipe into a filling valve that communicates with the air chamber of the tire so that its tip opening faces the top of the air chamber on the inner peripheral surface of the tire. Since the air replaced by the liquid filler is discharged through this exhaust pipe, there is no need to provide through holes in the tread as in the past, and this eliminates the need to drill through holes in the tread and the associated miscellaneous matters. Work is omitted, productivity is improved, and the tire reinforcing layer is not damaged or deteriorated due to the through holes in the tread, so the life of the tire can be extended.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an apparatus for implementing the present invention,
FIG. 2 is a schematic diagram showing the piping system in the same device. 1... Tire, 2... Annular packing,
3...Wheel rim, 5...Filling valve, 6...Air chamber, 8...20 connector, 8a, 8b...Opening Part, 10...
・Exhaust pipe, 10a... Tip opening, 10b...
...Outer end opening, 11...Plug, 12...
... Union, 13.14 ... Hose, 18
...Liquid filler.

Claims (1)

[Scope of Claims] 1. A filling valve communicating with an air chamber of a tire mounted on a wheel rim is provided through the wheel rim, and
The exhaust pipe is inserted into the filling valve so that the opening at its tip faces the inner peripheral surface of the tire, and the tire is stood upright so that the opening at the tip of the exhaust pipe is located at the top of the air chamber. Inject the liquid filler into the air chamber from the filling valve, exhaust the air in the air chamber through the exhaust pipe, and stop injecting the liquid filler when the liquid filler overflows from the exhaust pipe. Once stopped, then the exhaust pipe is pulled out from the filling valve and its insertion hole is closed, and then the liquid filler is injected again from the filler valve until it reaches the specified internal pressure of the tire, and then the liquid filler in the tire is cured. A method for manufacturing a filled tire, characterized by: 2. A liquid filler injection pipe is removably connected to one port of a two-day connector that is removably installed on a filling valve that communicates with the air chamber of a tire attached to a wheel rim, and a connector and a connector are connected to the other port. an exhaust pipe that passes through the filling valve, with its tip opening facing the top of the air chamber;
A filling tire manufacturing apparatus characterized in that a plug is removably inserted so that the rear end opening is located outside the air chamber, and which blocks the insertion part of the exhaust pipe when the exhaust pipe is removed. .