JP4363743B2 - Sealant filling method for tire tube with sealant - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire tube with a sealant provided with an air chamber filled with air inside a tire tube and a sealant chamber filled with a sealant, and more particularly to a method of filling the sealant chamber with the sealant. .
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 58-74342 discloses a tire tube containing a sealing agent in which a sealing agent is filled in the tire tube and a tire tube is stabbed by a nail or the like to self-seal with the sealing agent to delay air leakage. This is known from Japanese Patent Laid-Open No. 9-300481.
[0003]
In JP-A-58-74342, a capsule containing a sealant is inserted into a tire tube before vulcanization molding, and the capsule is destroyed by external force after vulcanization molding. A sealant is dispersed in the tube. In addition, what is described in Japanese Patent Laid-Open No. 9-300481 is that a sealant is filled from a sealant filling hole formed in a tire tube in a state where air is filled in an air chamber of the tire tube and air is pushed out from the sealant chamber. The chamber is filled with a sealant.
[0004]
[Problems to be solved by the invention]
However, the former sealing agent filling method may not only damage the tire tube when an external force is applied to break the capsule, but also the sealing agent may clog the air valve provided on the tire tube. was there. Further, the latter sealing agent filling method has a problem that not only it is difficult to completely exhaust the air in the sealing agent chamber but also it takes time to exhaust the air from the sealing agent chamber.
[0005]
The present invention has been made in view of the above-mentioned circumstances, and completes the work of filling the sealant into the sealant chamber of the tire tube in a short time while avoiding air mixing, and the sealant after filling is used as the sealant. The object is to reliably prevent leakage from the filling hole.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a tire tube with a sealant provided with an air chamber filled with air and a sealant chamber filled with a sealant inside the tire tube. A first step of forming a sealant filling hole communicating with the sealant chamber in the outer peripheral wall of the tire tube, a second step of filling the sealant chamber through the sealant fill hole, and a sealant chamber. A tire tube containing a sealant, comprising: a third step of evacuating and discharging the air to be discharged; and a fourth step of closing the sealant filling hole in a state where the periphery of the sealant filling hole is clamped A sealing agent filling method is proposed.
[0007]
According to the above configuration, since the sealing agent is filled in a state where the air existing in the sealing agent chamber is evacuated and discharged, the sealing agent can be filled in a short time without mixing air into the sealing agent. In addition, since the sealant filling hole is closed while the periphery of the sealant filling hole is clamped, air is prevented from entering again into the sealant chamber when the sealant filling hole is closed, thereby ensuring stable sealing performance. be able to.
[0008]
According to the invention described in claim 2, in addition to the configuration of claim 1, in the first step, the sealing agent is formed with a hot nail on the outer peripheral wall of the tire tube while the inner peripheral wall of the tire tube is supported. A method for filling a sealant in a tire tube with a sealant, which is characterized by forming a filling hole, is proposed.
[0009]
According to the above configuration, the sealing agent filling hole can be formed easily and reliably because the inner peripheral wall of the tire tube is supported and the sealing agent filling hole is formed on the outer peripheral wall by hot nail.
[0010]
According to the invention described in claim 3, in addition to the configuration of claim 1, in the fourth step, the sealant filling hole is bonded to the raw rubber sheet while the periphery of the sealant filling hole is clamped. A sealing agent filling method in a tire tube containing a sealing agent, which is characterized by being blocked, is proposed.
[0011]
According to the above configuration, the sealing agent filling hole is closed by the adhesion of the raw rubber sheet while the periphery is clamped, so that the raw rubber sheet is bonded to the sealing agent chamber while preventing air from entering the sealing agent chamber again from the sealing agent filling hole. It is possible to prevent the deviation and ensure the quality of the bonded portion.
[0012]
According to the invention described in claim 4, in addition to the configuration of claim 1, the fourth step includes a step of clamping the periphery of the sealant filling hole while evacuating air existing in the sealant chamber. And a step of buffing the periphery of the sealing agent filling hole in a clamped state, and a step of closing the sealing agent filling hole by adhesion of a raw rubber sheet. A sealing agent filling method is proposed.
[0013]
According to the above configuration, since the raw rubber sheet is bonded in a state where the periphery of the sealing agent filling hole is clamped, air is prevented from entering again from the sealing agent filling hole into the sealing agent chamber during the bonding process. It is possible to prevent the displacement of the bonding position and ensure the quality of the bonded portion. In addition, buffing is performed with the periphery of the hole filled with the sealant clamped, so it is possible not only to prevent the tire tube from being damaged by the load of buffing, but also to remove the oil and dirt and increase the adhesive strength of the raw rubber sheet. Can be increased.
[0014]
According to the fifth aspect of the present invention, in addition to the configuration of the first aspect, in the fourth step, the sealant filling hole is made of the thermoplastic resin or hot resin while the periphery of the sealant filling hole is clamped. A sealing agent filling method for a tire tube containing a sealing agent, characterized by being blocked by a melt resin, is proposed.
[0015]
According to the above configuration, the sealing agent filling hole is closed with the thermoplastic resin or the hot melt resin in a state where the periphery is clamped, so that air can be prevented from entering again into the sealing agent chamber from the sealing agent filling hole. The sealant filling hole can be closed in time.
[0016]
According to the sixth aspect of the invention, in addition to the configuration of the first aspect, the fourth step is a step of clamping the periphery of the sealant filling hole while evacuating the air existing in the sealant chamber. And a step of buffing the periphery of the sealing agent filling hole in a clamped state, and a step of closing the sealing agent filling hole with a thermoplastic resin or a hot melt resin. A method of filling a sealant in a tire tube is proposed.
[0017]
According to the above configuration, the sealing agent filling hole is closed with the thermoplastic resin or the hot melt resin in a state where the periphery is clamped, so that air can be prevented from entering again into the sealing agent chamber from the sealing agent filling hole. The sealant filling hole can be closed in time. Moreover, buffing is performed with the periphery of the sealant filling hole clamped, so that not only can the tire tube be prevented from being damaged by the load of buffing, but also the oil or dirt can be removed to remove the thermoplastic resin or hot melt. The occlusion strength by the resin can be increased.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0019]
1 to 4 show a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a wheel equipped with a tube-filled tire, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 4 is a second partial view illustrating the sealing agent filling process.
[0020]
As shown in FIGS. 1 and 2, a rim R of a motorcycle wheel is fitted with a tube-filled tire T including a tire body 1 and a tire tube 2 housed therein. The tire tube 2 includes an air chamber peripheral wall 3i positioned on the inner side in the radial direction of the tire T and a sealant chamber peripheral wall 3o positioned on the outer side in the radial direction, and the peripheral wall 3 having an annular cross section. The connecting portion between the air chamber peripheral wall 3i and the sealant chamber peripheral wall 3o of the peripheral wall 3 is connected to each other by a partition wall 4 formed integrally therewith. The air chamber 5 having a substantially circular cross section defined between the air chamber peripheral wall 3i and the partition wall 4 is filled with air, and has a substantially arc-shaped cross section defined between the sealant chamber peripheral wall 3o and the partition wall 4. The sealant chamber 6 is filled with a gel sealant 7.
[0021]
The rim R has an annular rim main body portion 11 extending in the circumferential direction of the tire T, and a pair of flange portions 12 and 12 that extend radially outward from both ends in the width direction of the rim main body portion 11 and hold the inner periphery of the tire main body 1. With. An air valve 13 that fills the air chamber 5 formed in the tire tube 2 with air is supported by penetrating an air valve mounting portion 14 formed at one place in the circumferential direction of the rim main body portion 11.
[0022]
Thus, since the sealant chamber 6 of the tire tube 2 is held in a shape along the inside of the tread 15 by the air pressure of the air chamber 5, the tire tube 2 is pierced from the radial direction or the side by a nail or the like. However, the sealing agent 7 immediately fills and repairs the stab wound, and delays the leakage of air from the air chamber 5. Further, since the sealant 7 is held in the sealant chamber 6 and does not flow out to the air chamber 5 side, the air valve 13 and the pressure gauge applied thereto are not clogged.
[0023]
Next, a process of filling the sealant chamber 6 of the tire tube 2 with the sealant 7 will be described with reference to FIGS. 3 and 4.
[0024]
First, an inner peripheral surface (air chamber peripheral wall 3i) of the tire tube 2 before being filled with the sealant 7 is supported on the upper surface of a horizontally disposed support plate 21 and heated to about 400 ° C. by an electric heater. Is lowered from above toward the support plate 21 to form a sealant filling hole 2a on the outer peripheral surface (sealant chamber peripheral wall 3o) of the tire tube 2. By using the hot nail 22 thus heated, the sealant filling hole 2a can be easily and reliably formed in the rubber tire tube 2 (see FIG. 3A). After retracting the hot nail 22 upward, a sealing agent injection hose 23 is inserted from the sealing agent filling hole 2 a to the bottom of the sealing agent chamber 6, and through the sealing agent injection hose 23, the sealing agent filling hole 2 a is inserted into the sealing agent chamber 6. Sealing agent 7 is injected into the bottom. When the sealing agent injection hose 23 is pulled out, the sealing agent 7 stays at the bottom of the sealing agent chamber 6 due to gravity, and air remains in the upper portion of the sealing agent chamber 6 (see FIG. 3B).
[0025]
Subsequently, the vacuum pad 24 connected to a negative pressure source (not shown) is lowered and adsorbed around the sealant filling hole 2a, and the air remaining in the sealant chamber 6 is sucked (see FIG. 3C). . Subsequently, the annular clamp member 25 surrounding the outer periphery of the vacuum pad 24 is lowered, and the lower surface thereof is pressed so as to surround the periphery of the sealant filling hole 2a, whereby the air chamber of the tire tube 2 is placed between the support plate 21 and the air chamber. The peripheral wall 3i, the partition wall 4, and the sealant chamber peripheral wall 3o are tripled and clamped (see FIG. 3D). At this time, since the air in the sealant chamber 6 is exhausted by the suction by the vacuum pad 24 in the previous step, the partition wall 4 and the sealant chamber peripheral wall 3o are in close contact with each other except for the portion filled with the sealant 7. . When the vacuum pad 24 is retracted upward from this state, the clamp member 25 is clamped so as to surround the periphery of the sealant filling hole 2a, so that air enters the sealant chamber 6 from the sealant filling hole 2a. There is no fear.
[0026]
Subsequently, the periphery of the sealant filling hole 2a surrounded by the clamp member 25 is polished with the buff 26 while maintaining the clamp by the clamp member 25, so that oil and dirt attached to the periphery of the sealant filling hole 2a are removed. It is removed (see FIG. 3E). At this time, a load is applied to the periphery of the sealant filling hole 2 a by the rotating buff 26, but the tire tube 2 is deformed by the frictional force received from the buff 26 because the portion is clamped immovably by the clamp member 25. Damage can be reliably prevented.
[0027]
Subsequently, the raw rubber sheet 28 is brought into contact with the periphery of the sealant filling hole 2a and heated by the raw rubber sheet bonding apparatus 27, whereby the raw rubber sheet 28 is vulcanized and bonded to close the sealant filling hole 2a (FIG. 4 (F)). Thus, since the raw rubber sheet 28 is vulcanized and bonded in a state of being clamped so as to surround the periphery of the sealant filling hole 2a by the clamp member 25, it is possible to reliably prevent the bonding position from being shifted and to secure the bonding quality. Can do. Further, since the raw rubber sheet 28 is vulcanized and bonded after the periphery of the sealing agent filling hole 2a is polished by the buff 26, it is possible to avoid a decrease in the bonding strength due to the dirt on the bonding surface. Then, the raw rubber sheet bonding device 27 and the clamp member 25 are retracted upward to complete the tire tube 2 (see FIG. 4G). In the tire tube 2 immediately after completion, the sealant 7 stays at the bottom of the sealant chamber 6. However, when the tire tube 2 is mounted on the tire body 1 and actually travels, the sealant 7 is caused by centrifugal force. It diffuses uniformly inside the sealant chamber 6.
[0028]
Next, the filling process of the sealing agent 7 according to the second embodiment of the present invention will be described with reference to FIG.
[0029]
The filling process of the sealing agent 7 of the second embodiment is the same as that of the first embodiment until the polishing process by the buff 26 (see FIG. 3), and the closing process of the sealing agent filling hole 2a is different from the first embodiment. Yes.
[0030]
That is, in FIG. 5 following FIG. 3, an acrylic or urethane thermoplastic resin 30 as a sealer is supplied from the sealer supply nozzle 29 to the periphery of the sealant filling hole 2a that has been polished by the buff 26 (FIG. 5). 5 (H)). Then, after retracting the sealer supply nozzle 29 upward, the thermoplastic resin 30 is heated for 15 seconds to 30 seconds with a molding die 31 heated to approximately 180 ° C. to be molded into a predetermined shape (see FIG. 5I). ). Thus, when the thermoplastic resin 30 cools and hardens, the sealant filling hole 2a is closed, and the tire tube 2 is completed (see FIG. 5J). During the sealing agent filling hole 2a closing process, the clamp member 25 is clamped so as to surround the periphery of the sealing agent filling hole 2a.
[0031]
Next, the filling process of the sealing agent 7 according to the third embodiment of the present invention will be described with reference to FIG.
[0032]
The filling process of the sealing agent 7 of the third embodiment is the same as that of the first embodiment (see FIG. 3) up to the polishing process by the buff 26 as in the second embodiment, and the sealing agent filling hole 2a is blocked. The process is different from the first embodiment.
[0033]
That is, in FIG. 6 following FIG. 3, the molding die 32 is brought into contact with the periphery of the sealing agent filling hole 2a after the polishing by the buff 26, and the molten hot melt resin 33 is injected through the inside (FIG. 6 (K )reference). Subsequently, cooling water is circulated inside the mold 32 to cool and solidify the hot melt resin 33 (see FIG. 6L), whereby the sealant filling hole 2a is closed with the solidified hot melt resin 33, and the tire The tube 2 is completed (see FIG. 6 (M)). During the sealing agent filling hole 2a closing process, the clamp member 25 is clamped so as to surround the periphery of the sealing agent filling hole 2a.
[0034]
As described above, according to the second and third embodiments, the sealant filling hole 2a is inserted into the thermoplastic resin 30 or the hot melt resin in a state where the periphery of the sealant filling hole 2a is clamped by the clamp member 25. Therefore, air can be prevented from entering again from the sealant filling hole 2a into the sealant chamber 6 from which air has been exhausted, and the sealant can be filled in a shorter time than the adhesion of the raw rubber sheet 28. The hole 2a can be closed. In addition, the buffing strength by the thermoplastic resin 30 or the hot melt resin 33 can be increased by buffing the periphery of the sealing agent filling hole 2a in advance.
[0035]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the sealing agent is filled in a state where the air existing in the sealing agent chamber is evacuated and discharged, the air is not mixed into the sealing agent for a short time. It can be filled with a sealing agent. In addition, since the sealant filling hole is closed while the periphery of the sealant filling hole is clamped, air is prevented from entering again into the sealant chamber when the sealant filling hole is closed, thereby ensuring stable sealing performance. be able to.
[0037]
According to the invention described in claim 2, since the seal agent filling hole is formed by hot nail on the outer wall while supporting the inner peripheral wall of the tire tube, the seal agent filling hole can be easily and reliably formed. it can.
[0038]
According to the third aspect of the present invention, since the sealing agent filling hole is closed by adhesion of the raw rubber sheet with the periphery clamped, air can be prevented from entering the sealing agent chamber again from the sealing agent filling hole. However, it is possible to prevent the deviation of the bonding position of the raw rubber sheet and ensure the quality of the bonded portion.
[0039]
According to the invention described in claim 4, since the raw rubber sheet is bonded in a state where the periphery of the sealant filling hole is clamped, air enters the sealant chamber again from the sealant filling hole in the bonding process. The quality of the bonded portion can be ensured by preventing the deviation of the bonding position of the raw rubber sheet. In addition, buffing is performed with the periphery of the hole filled with the sealant clamped, so it is possible not only to prevent the tire tube from being damaged by the load of buffing, but also to remove the oil and dirt and increase the adhesive strength of the raw rubber sheet. Can be increased.
[0040]
According to the invention described in claim 5, since the sealant filling hole is closed with the thermoplastic resin or the hot melt resin in the state where the periphery is clamped, air enters the sealant chamber again from the sealant filling hole. It is possible to close the sealing agent filling hole in a very short time while preventing this.
[0041]
According to the invention described in claim 6, since the sealing agent filling hole is closed with the thermoplastic resin or the hot melt resin in the state where the periphery is clamped, air enters the sealing agent chamber again from the sealing agent filling hole. It is possible to close the sealing agent filling hole in a very short time while preventing this. Moreover, buffing is performed with the periphery of the sealant filling hole clamped, so that not only can the tire tube be prevented from being damaged by the load of buffing, but also the oil or dirt can be removed to remove the thermoplastic resin or hot melt. The occlusion strength by the resin can be increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a wheel equipped with a tire containing a tube. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1. FIG. 3 is a first partial view illustrating a sealing agent filling process. Fig. 5 illustrates a sealing agent filling process according to the second embodiment. Fig. 6 illustrates a sealing agent filling process according to the third embodiment. Explanation of]
2 Tire tube 2a Sealing agent filling hole 5 Air chamber 6 Sealing agent chamber 7 Sealing agent 22 Hot nail 28 Raw rubber sheet 30 Thermoplastic resin 33 Hot melt resin

Claims (6)

In a tire tube with a sealant provided with an air chamber (5) filled with air inside a tire tube (2) and a sealant chamber (6) filled with a sealant (7),
A first step of forming a sealant filling hole (2a) communicating with the sealant chamber (6) in the outer peripheral wall of the tire tube (2);
A second step of filling the sealant chamber (6) with the sealant (7) through the sealant filling hole (2a);
A third step of evacuating and discharging the air present in the sealant chamber (6);
A fourth step of closing the sealant filling hole (2a) in a state where the periphery of the sealant filling hole (2a) is clamped;
A method for filling a sealant in a tire tube with a sealant, comprising: The first step includes
The sealant filling hole (2a) is formed in the outer peripheral wall of the tire tube (2) with a hot nail (22) while the inner peripheral wall of the tire tube (2) is supported. The sealing agent filling method in the tire tube containing the sealing agent. The fourth step includes
2. The tire tube with sealant according to claim 1, wherein the sealant filling hole (2 a) is closed by adhesion of the raw rubber sheet (28) in a state where the periphery of the sealant filling hole (2 a) is clamped. 3. The sealing agent filling method. The fourth step includes
Clamping the periphery of the sealant filling hole (2a) while evacuating the air present in the sealant chamber (6);
Buffing the periphery of the sealant filling hole (2a) with the periphery thereof clamped;
Sealing the sealing agent filling hole (2a) by bonding the raw rubber sheet (28);
The method for filling a sealant in a tire tube with a sealant according to claim 1, comprising: The fourth step includes
The sealant filling hole (2a) is closed with a thermoplastic resin (30) or a hot melt resin (33) in a state where the periphery of the sealant filling hole (2a) is clamped. The sealing agent filling method in the tire tube containing the sealing agent. The fourth step includes
Clamping the periphery of the sealant filling hole (2a) while evacuating the air present in the sealant chamber (6);
Buffing the periphery of the sealant filling hole (2a) with the periphery thereof clamped;
Sealing the sealing agent filling hole (2a) with the thermoplastic resin (30) or the hot melt resin (33);
The method for filling a sealant in a tire tube with a sealant according to claim 1, comprising:

Images