JPH10138702A - Assembly body of tire and rim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of filled-up air with good workability and positively. SOLUTION: A spoke rim 3 is provided with a pair of ring-like bead seats 4 extending in the direction of tire axis, a ring-like well 6 which is provided between the inside ends in the direction of tire axis of the bead seats 4. Mounting parts 12 which are to be mounted to the outer ends of spokes 11, are arranged in many mounting holes 10 provided in the well 6, and a sealing material 13 made of elastic material, which is extended in the circumferential direction over the full length of the periphery of the well 6, is arranged in the well 6. Further, an inextensible, ring-like band 14 for fastening the sealing material 13 to the well 6 to press it against the rim 3, is provided radially outside the sealing material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire and a rim which can seal a mounting hole to which a mounting portion of a spoke is mounted in a well with good workability, and which can surely prevent air leakage from the mounting hole. Related to the assembly.

[0002]

2. Description of the Related Art When a spoke rim frequently used for motorcycles, bicycles, and the like is employed in a tubeless tire from the viewpoint of puncture resistance and weight reduction, a spoke rim mounting hole for a spoke mounting portion is installed. For example, the following techniques are known as conventional techniques for preventing air leakage.

Japanese Patent Application Laid-Open No. 60-38201 (conventional example 1)
As shown in FIG. 10), at the outer end of the wire spoke s1 inserted into the mounting hole formed in the rim r1,
It has been proposed to arrange a sealing member c1 such as an O-ring to hermetically seal the mounting hole.

Japanese Utility Model Laid-Open Publication No. 59-45103 (hereinafter referred to as Conventional Example 2) discloses that a spoke mounting flange f2 is provided inside a well w2 of a rim r2, and a spoke mounting hole is formed in the well w2, as shown in FIG. 2 shows a wheel not provided with.

Japanese Unexamined Patent Publication (Kokai) No. 64-67401 (hereinafter referred to as Conventional Example 3) discloses a heat-shrinkable cover for covering an attachment portion of a spoke s3 attached to a well w3 of a rim r3 as shown in FIG. This shows a technique of arranging a sheet a3 and thermally contracting the sheet a3 to prevent air leakage from the attachment hole.

Japanese Unexamined Utility Model Publication No. Sho 62-43002 (hereinafter referred to as Conventional Example 4) discloses that, after the outer end of the spoke s4 is attached to the well w4 of the rim r4 as shown in FIG.
It has been proposed to attach a rubber seal material a4 to the upper surface of the spoke 4 to seal the spoke attachment portion.

Japanese Unexamined Patent Publication (Kokai) No. 62-227801 (referred to as Conventional Example 5) discloses that a protrusion a5
Rim r5 with bead seat having rim and rim well w5
It is shown that an annular sealing material c5 and a tape material t5 are arranged between the protrusions a5, a5.

In Japanese Utility Model Laid-Open Publication No. 61-110401 (hereinafter referred to as Conventional Example 6), as shown in FIG. 15, a cushion material c6a, a shielding member a6, and a sealing material c6b are provided in order from the inside in a well w6 of a rim r6. Propose that.

[0009]

However, in the prior art 1 described above, since the attachment portion of the wire spoke s1 to the rim is sealed one by one, it takes time to attach the wire spoke s1 to the rim r1. There is a problem that air leakage is likely to occur due to hooking and mounting mistakes.

Further, in the above-mentioned conventional example 2, the rim r2 is a variant having the spoke mounting flange f2, so that a normal spoke rim cannot be used and the rim cost tends to increase.

Further, in the above-mentioned conventional example 3, the process of thermally shrinking the sheet a3 requires time and effort, for example, it is necessary to prepare a heat application device, and it is impossible to reuse the sheet a3, and it is also necessary to reduce costs. It is a problem in terms of.

Further, the conventional example 4 has a problem that the fitting force between the rubber seal material a4 and the well w4 of the rim r4 is apt to be insufficient, and air leakage is apt to occur.

In the conventional example 5, the fitting force between the annular seal member c5 and the rim well w5 is apt to be insufficient, air leaks easily, and a projection a5 is provided on the rim r5, so that a normal spoke rim cannot be used. There is a problem.

In the prior art 6, the work of applying the sealing material c6b takes a long time to reduce the workability, and the sealing material c6b cannot be reused. Since the positioning is performed by the step portion and the groove, the tightening force tends to be insufficient, and there is a problem that the sealing cannot be reliably achieved if the sealing material c6b is eliminated.

The present invention has been devised in view of the above-mentioned problems of the prior art, and is a combination of a tire and a rim that can prevent air leakage with good workability without incurring an increase in cost. The purpose is to provide three-dimensional objects.

[0016]

SUMMARY OF THE INVENTION The present invention is a tire and rim assembly comprising a pneumatic tire and a spoke rim to which the pneumatic tire is mounted, the spoke rim including a tire shaft. A pair of annular bead seats extending in the tire axial direction and seating on each bead base surface of the tire, a rim flange extending radially outward from an outer end in the tire axial direction of each bead seat; An annular well provided between the inner ends in the tire axial direction of the bead seat and having an annular well recessed inward in the radial direction, and an attachment part for attaching an outer end of the spoke to a number of attachment holes provided in the well. And a seal member made of an elastic material extending in the circumferential direction over substantially the entire periphery of the well is disposed in the well, and the seal member is fastened to the well outside in the radial direction of the seal member. A non-extensible annular band is provided to prevent the air filled into the tire cavity formed by the tire and the rim from leaking from the attachment hole by pressing against the rim. It is characterized by having a length adjusting part capable of adjusting the length.

The well has a bottom in which the mounting hole is formed at an inner end of a side portion extending inward in the radial direction at an inner end in the tire axial direction of the bead seat, and the sealing material is An annular body extending in the circumferential direction covering the attachment portion, and the sealing material has, at a base portion covering the bottom portion, a protruding portion covering at least a part of each side portion on both sides; In the main portion pressing the base portion, it is provided with a wing portion pressing at least a part of the protruding portion on both sides,
Even when the attachment portion of the spoke projects from the bottom of the well, it is desirable in that the attachment hole can be reliably sealed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5, an assembly 1 of a tire and a rim according to the present invention includes a pneumatic tire 2 (hereinafter referred to as a tire 2) and a spoke rim 3 (hereinafter referred to as a rim 3) on which the tire 2 is mounted.

The rim 3 has a pair of annular bead seats 4, 4, which extend substantially in the tire axial direction and are seated on the respective bead base surfaces 2 a, 2 a of the tire 2 in a cross section including the tire axle, and each bead seat 4, each bead portion 2b of the tire 2 extending radially outward from the outer end in the tire axial direction;
A pair of rim flanges 5, 5 abutting the outer surface of 2b;
An annular well 6 provided between the pair of bead seats 4 and 4 at the inner ends in the tire axial direction and concaved inward in the radial direction is integrally provided.

The well 6 has a pair of side portions 7, 7 extending inward in the radial direction and inward in the direction of decreasing the well width at the inner end in the tire axial direction of the bead seat 4, respectively. A bottom 9 is formed by connecting the inner ends of the pair of side parts 7.

The bottom 9 of the well 6 is provided with a number of mounting holes 10 at appropriate intervals in the circumferential direction.

An outer end of the spoke 11 is inserted through the mounting hole 10 and a spoke nipple 21 which can be loosely fitted in the mounting hole 10 and has a flange-shaped mounting portion 12 at the outer end. By screwing to the outer end, the spoke 1
The outer end of 1 is attached to the mounting hole 10 by the mounting portion 12 arranged on the mounting hole 10.

The well 6 is provided with a sealing member 13 formed of an annular body extending circumferentially over the entire periphery of the well 6 so as to cover the attachment portions 12. A non-extensible band 14 is provided radially outward.

The sealing material 13 can be formed from a low-elastic material, for example, a compounded rubber such as natural rubber, butadiene rubber (BR) or styrene-butadiene rubber (SBR), or an elastomer such as urethane. In particular, butyl rubber such as butyl halide having low air permeability, or a material having low air permeability equal to or less than butyl rubber is preferable.

The sealing material 13 has a JISA hardness of 5
It is preferable that the angle be 0 degrees or more and 90 degrees or less. This is because if the angle is smaller than 50 degrees, the seal member 13 is likely to be damaged when tightened by the band 14, and if the angle exceeds 90 degrees, the sealing member 13 lacks flexibility and it is difficult to obtain sufficient sealing properties.

Further, it is preferable that the thickness of the sealing material 13 is not less than 0.5 mm and not more than 3.0 mm. If the thickness is less than 0.5 mm, the sealing material 13 is easily damaged between the attachment portion 12 and the band 14. There is no noticeable improvement in gender.

As shown in FIG. 1 and FIG. 3, the sealing material 13 is attached to the bottom portion 9 of the well 6 so as to closely cover the bottom portion 9 and at least the side portions 7 on both sides. It has a pair of protrusions 16, 16 that partially cover it.

The sealing member 13 can be extended from the outside of the rim 3 to the extent that it can be fitted around the well 6.

The band 14 has a pair of wings 1 for pressing at least a part of the protruding portions 16 on both sides of a main portion 17 capable of pressing the base 15 of the sealing material 13.
It is a non-stretchable annular body comprising 9, 9 and is preferably formed of metal such as iron, stainless steel, aluminum, plastic such as short fiber reinforced plastic, or a combination thereof. It is preferable to form the band 14 using spring steel because the elastic force of the band 14 can enhance the workability when the sealing member 13 is tightened.

The band 14 has a length adjusting portion 20 which can adjust the length in the circumferential direction. The length adjustment unit 20
As shown in FIG. 4 and FIG. 5, it is composed of a locking portion 23 and a locked portion 24 which are respectively provided at both ends forming the annular band 14 by being joined to each other.

The locking portion 23 is provided by an upper piece 27 and a lower piece 29 forming an insertion hole 26 into which one of the ends can be inserted the other end, and the upper piece 29 is cut and raised. 1
A gear shaft 32 rotatably spanned between the pair of standing pieces 30 and 30 and having a worm gear 31 fixed between the standing pieces 30 and 30; and a screw shaft 3 protruding from the gear shaft 32.
A lock nut 33 for locking the gear shaft body 32 by screwing the gear shaft body 32 to the gear shaft 2A via a washer and a disc spring. 31 is stopped.

The locked portion 24 comprises a plurality of holes 35 formed at the other end thereof and spaced apart from the main portion 17 with the other end inserted into the insertion hole 26. Hole 3
5, the worm gear 31 is locked and the gear shaft 32 is rotated using a tool such as a hexagon wrench, so that the circumferential length of the band 14 can be easily adjusted with good workability.

By tapering the tip of the lower piece 29 of the locking portion 23, the occurrence of a step at the joining start portion where the joining of the locking portion 23 and the locked portion 24 starts is suppressed, and the sealing property is improved. It is preferable from the viewpoint that it can be ensured.

In the radially inner portion of the joining start portion,
By providing an auxiliary seal body made of an elastic body extending in the cross-sectional direction of the band 14, the sealing performance can be improved. This auxiliary seal member may be fixed to the band 14 using an adhesive or the like, or may be fixed to the seal member 13 using an adhesive or the like. Further, a part of the seal member 13 is made thicker. Thereby, an auxiliary seal body can be formed.

The length adjusting section 20 is not limited to the one shown in FIGS. 4 and 5, and for example, as shown in FIG. One in which screw shafts 39, 39 protruding from the upper surface of the other end via elastic materials 37, 37 such as rubber are inserted and fixed with nut fittings 40, 40 such as chrysanthemum nuts for preventing rotation. Various things can be adopted.

By shortening the circumferential length of the band 14 by using the length adjusting portion 20, the sealing material 13 is fastened to the well 6 and pressed against the rim 3, whereby the tire 2 and the rim 3 It is possible to reliably and reliably prevent the air filled in the tire bore S from leaking from the mounting holes 10 from leaking from the mounting holes 10.

The seal member 13 and the band 14 can be reused and can suppress an increase in cost, and at least a part of the protruding portions 16 of the seal member 13 is controlled by the wing portions 19. By pressing
Even when the attachment portion 12 protrudes from the bottom portion 9, the attachment holes 10 can be reliably sealed.

As shown in FIG. 2, the bottom 9 of the well 6
JATMA10-
18, a clamp-in valve such as JS430 can be suitably used.

The base 15 of the sealing material 13 and the band 1
The main part 17 of the valve 4 is provided with valve holes 43 and 44 through which the inner end of the valve 42 passes. By tightening the valve 42 with a nut fitting 45 arranged outside the rim 3, The valve holes 43 and 4 are formed by packing rubber 41 disposed inside a nut 46 provided in
Seal 4

FIGS. 7 and 8 show another embodiment of the present invention. In this embodiment, the band 14 is formed into an annular body by overlapping both ends thereof, and an upper hole 50 through which the valve 42 is inserted is formed in an upper overlapping portion 49 which is disposed radially outward at the overlapping portion. And the band 1
4 end and a band 14 end (upper overlap 4
9), a valve 42 is inserted into a lower overlapping portion 52 which is gradually radially inwardly inclined toward the inner side in the radial direction at the overlapping portion, and a valve 42 is inserted therethrough. A band 53 extending on the side opposite to the end of the band 14 and extending in the longitudinal direction of the band 14;
A lower inclined portion 54 is formed which gradually inclines radially inward in a direction away from the four ends (the end of the lower overlapping portion 52), and the upper hole 50, the elongated hole 53, the upper inclined portion 51, and the lower inclined portion 54 are formed.
Thus, the length adjusting section 20 is formed.

Further, the sealing material 13 includes at least a band 14
And between the side portions 7 of the well 6 in the circumferential direction, for example, are fixed to the band 14 using an adhesive or the like.

As shown in FIG. 9, the bottom of the well 6 has a well hole 55 provided as a long hole extending in the circumferential direction thereof, the long hole 53, and the upper hole 50.
2 and the nut fitting 56 is tightened, whereby the valve 42 moves in the circumferential direction along the well hole 55 and the long hole 53, and the upper inclined portion 51 is slid in the circumferential direction on the lower inclined portion 54. To reduce the circumferential length of the band 14 and press the sealing material 13 against each side 7, 7 of the well 6.

Therefore, the sealing material 13 extends in the circumferential direction over the entire circumference of the well 6 and can reliably seal the mounting hole 10. As shown in FIG. 7, the convex portion 57 formed by the upper inclined portion 51 and the lower inclined portion 54 which are arranged so as to be overlapped in the radial direction by tightening the nut fitting 56 is a sealing material between the side portions 7. Band 1 arranged via 13
It is stored in a space 59 formed between the bottom 4 and the bottom 9. Between the valve 42 and the band 14, a valve seal body 60 made of an elastic material such as rubber which is fitted in the upper hole 50 to prevent air leakage is disposed.

The sealing member 13 may be provided on the outer surface of the band 14 in the radial direction, and the lower inclined portion 54 may be moved in the circumferential direction by tightening the valve 42. At this time, the well hole 55 does not necessarily have to be a long hole.

According to the embodiment shown in FIGS. 7 and 8, the mounting holes 10 can be sealed simply by tightening the valve 42, and the workability can be improved.

[0046]

EXAMPLE A pneumatic tire having a tire size of 140 / 80-17 was mounted on a rim having a rim size of 17 × MT3.50, and was made of butyl compound rubber (JISA hardness 60 degrees) and had a thickness of 1.5 mm. A product of the present invention (product of the present invention) was prototyped using a sealing material and a band made of spring steel and having a thickness of 0.5 mm.
The following test was performed by filling with air until the pressure became 25 kgf / cm ² . The pneumatic tire has a carcass composed of two carcass plies in which a nylon cord is inclined at 30 degrees with respect to the tire circumferential direction (the cords are arranged in a direction crossing the plies).

Actual vehicle endurance test The above-mentioned example product was mounted on the rear wheel of a 400 cc motorcycle,
The tires described below were mounted on the front wheels, and the tires were driven on a dry paved road 10,000 km and a dirt road surface 500 km.

Front wheels: tire size 120 / 80-17,
Rim size 17 × MT3.00, internal pressure 2.25kmf / cm
^While having a tube at ² , the tire has a carcass consisting of two carcass plies with cords inclined at 30 degrees to the tire circumferential direction. Note that no seal material or band is provided.

After the test, reduction in the internal pressure, damage to the sealing material and the band of the product of the embodiment were examined, and it was found that there was no reduction in the internal pressure and no damage, and each member could be reused.

Drum endurance test The above product was loaded on a drum with a load of 325 kg and a speed of 65 km /
The vehicle was run under the conditions of h and the following tests were performed. -1 Check the internal pressure every 1000km. -2 Run the tire until visible damage occurs, and then inspect the band and seal material for damage.

In the test of -1, no decrease in internal pressure was observed. In the test of -2, tire separation occurred after traveling 21,000 km. No damage to the band. In addition, as for the sealing material, abrasion was generated on the contact surface of the spoke attachment portion, but the maximum depth was about 0.2 mm, and it was in a situation where it could be reused.

[0052]

As described above, in the tire and rim assembly of the present invention, a seal member made of an elastic material extending in the circumferential direction is arranged on the well of the spoke rim, and the seal member is provided radially outside of the seal member. A non-extensible annular band for pressing the sealing material against the well and pressing against the rim, and a length adjusting portion for adjusting the circumferential length of the band are provided on the band; By pressing the seal material against the rim due to the tightening of the above, it is possible to reliably prevent the leakage of the filling air from the attachment hole without lowering the workability,
It is possible to reuse the sealing material and the band, thereby suppressing an increase in cost.

In the invention according to the second aspect, when the band has a wing portion which presses a protruding portion of a sealing material covering both sides of the well, the attachment portion of the spoke projects from the bottom of the well. In such a case, sufficient sealing performance can be obtained without damaging the sealing material.

[Brief description of the drawings]

FIG. 1 is a sectional view including a tire shaft showing an example of an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of an embodiment of the present invention together with a valve.

FIG. 3 is a perspective view illustrating a sealing material.

FIG. 4 is a partial perspective view illustrating a band length adjustment unit.

FIG. 5 is a sectional view thereof.

FIG. 6 is a partial perspective view showing another example of the length adjusting unit.

FIG. 7 is a cross-sectional view showing another embodiment of the present invention.

FIG. 8 is a partially exploded perspective view thereof.

FIG. 9 is a sectional view in the circumferential direction.

FIG. 10 is a cross-sectional view for explaining a conventional technique.

FIG. 11 is a cross-sectional view for explaining a conventional technique.

FIG. 12 is a cross-sectional view for explaining a conventional technique.

FIG. 13 is a cross-sectional view for explaining a conventional technique.

FIG. 14 is a cross-sectional view for explaining a conventional technique.

FIG. 15 is a cross-sectional view for explaining a conventional technique.

[Explanation of symbols]

 Reference Signs List 2 pneumatic tire 2a bead base surface 3 spoke rim 4 bead seat 5 rim flange 6 well 7 side 9 bottom 10 mounting hole 11 spoke 12 mounting portion 13 sealing material 14 band 15 base 16 protruding portion 17 main portion 19 wing portion 20 Length adjustment section S Tire lumen

Claims (2)

[Claims] 1. A tire and rim assembly comprising a pneumatic tire and a spoke rim to which the pneumatic tire is mounted, wherein the spoke rim extends in a tire axial direction in a cross section including a tire axis. A pair of annular bead seats on which each bead base surface of the tire is seated; a rim flange extending radially outward from an outer end in the tire axial direction of each bead seat; An annular well provided between the ends, the annular well being concave inward in the radial direction, and an attachment portion for attaching an outer end of the spoke is disposed in a number of attachment holes provided in the well; A sealing material made of an elastic material extending in the circumferential direction over substantially the entire circumference of the well, and furthermore, the sealing material is fastened to the well radially outside the sealing material and pressed against the rim. While providing a non-extensible annular band for preventing the air filled into the tire lumen formed by the tire and the rim from leaking from the attachment hole, the band has a length that can adjust its circumferential length. An assembly of a tire and a rim, characterized in that the assembly includes a tire adjustment part. 2. The well has a bottom portion provided with the attachment hole at an inner end of a side portion extending inward in the radial direction at an inner end in the tire axial direction of the bead seat, and the sealing material is An annular body covering the attachment portion and extending in the circumferential direction,
In addition, the sealing material has a protruding portion that covers at least a part of each side portion on both sides on a base portion that covers the bottom portion, and the band has at least one protruding portion on both sides on a main portion that presses the base portion. 2. The tire and rim assembly according to claim 1, further comprising a wing for pressing said portion.