Tire valve and tilt restriction member

Abstract

[Problem] To provide a technology that makes it possible to stabilize fixation of a tire valve to a rim better than the prior art. [Solution] A tire valve 10A according to the present disclosure comprises: a valve stem 30A configured to accommodate a valve core 20; an elastomer press-fitted member 40A configured such that the press-fitted member covers an outer surface of the valve stem 30A, is press-fitted from the inner surface side of a rim 91 of a tire wheel 90 into a valve attachment hole 92 of the rim 91, and is attached in a state of penetrating the rim 91 from the inside to the outside; and a tilt restriction member 50A having an pull-out prevention fixing part (more specifically, a female thread part 54N) fixed to the valve stem 30A in a pull-out prevention state, and partially overlapping an inner surface of the rim 91.

Description

Tire valve and tilt restriction member

[0001] The present disclosure relates to a tire valve attached to a tire wheel and a tilt restricting member used in the tire valve.

[0002] Conventionally, as this type of tire valve, there is known a type (commonly called a "snap-in valve") that is attached by being press-fitted into a valve mounting hole of a tire wheel (see, for example, Patent Document 1).

[0003] JP 2007-153298 A (paragraph

[0039] , FIG. 8)

[0004] However, the conventional tire valves described above can tilt due to centrifugal force when the tire rotates. Therefore, the present application provides a technology that enables the tire valve to be fixed to the rim more stably than before.

[0005] A tire valve according to one aspect of the present disclosure, which has been made to solve the above problems, is a tire valve comprising: a valve stem configured to accommodate a valve core; an elastomer press-fit member that covers the outer surface of the valve stem and is configured to be press-fit into a valve mounting hole in a tire wheel rim from the inner surface of the rim so as to be attached in a state in which it penetrates the rim from inside to outside; and a tilt-restricting member that has a retaining portion that is fixed to the valve stem in a retaining state and has a portion that overlaps the inner surface of the rim.

[0006] FIG. 1 is a side cross-sectional view of a tire valve and a tire wheel according to a first embodiment. FIG. 2 is a side cross-sectional view of a tire valve body and a tilt restriction member. FIG. 3A is an enlarged side cross-sectional view of a base end portion of a tire valve according to a second embodiment. FIG. 3B is a front view of the tilt restriction member. FIG. 4A is an enlarged side cross-sectional view of a base end portion of a tire valve according to a third embodiment. FIG. 4B is an enlarged side cross-sectional view of a base end portion of a tire valve according to a fourth embodiment. FIG. 5 is an enlarged side cross-sectional view of a base end portion of a tire valve according to a fifth embodiment.

[0007] [First Embodiment] A tire valve 10A according to a first embodiment will be described with reference to Figures 1 and 2. As shown in Figure 1, the tire valve 10A of this embodiment includes a tire valve main body 10X to which a tilt restriction member 50A, a condition monitoring device 60, a cap 36, and the like are attached.

[0008] First, the tire valve body 10X will be described. Here, the right end of the tire valve body 10X in Figures 1 and 2 forms the "tip end," and the opposite side forms the "base end." Hereinafter, for each component of the tire valve 10A, the right side in Figures 1 and 2 will be referred to as the "tip side" and the opposite side as the "base end," similar to the tire valve body 10X.

[0009] As shown in FIG. 2, the tire valve body 10X includes a valve core 20, a valve stem 30A that houses the valve core 20, and a press-fit member 40A that covers a longitudinal intermediate portion of the valve stem 30A.

[0010] The valve stem 30A is, for example, a metal pipe, and its outer surface is provided with a stepped portion 31D near the tip and a flange 31F slightly proximal to the longitudinal center. The portion of the outer surface of the valve stem 30A distal to the stepped portion 31D forms a distal large-diameter portion 31A, which is provided with a threaded portion 31B onto which the cap 36 is threadedly attached. The portion of the outer surface of the valve stem 30A between the stepped portion 31D and the flange 31F forms an intermediate small-diameter portion 31E extending with a uniform outer diameter. Furthermore, the portion of the outer surface of the valve stem 30A proximal to the flange 31F is provided with a first medium-diameter portion 31G, a second medium-diameter portion 31H, and a proximal small-diameter portion 31I, in order from the flange 31F, with the diameters gradually decreasing toward the proximal end. A male screw portion 31J is formed in approximately the base end side half of the second medium diameter portion 31H.

[0011] The inside of the valve stem 30A is provided with female threads 32A, 32B at the tip and base ends. Furthermore, inside the tip-side large-diameter section 31A of the valve stem 30A, a tapered section 32C and a minimum inner diameter section 32D are provided proximally of the female thread 32A, with the diameter gradually decreasing from the tip opening toward the minimum inner diameter section 32D. Furthermore, an air hole 33 is provided between the female thread 32B of the valve stem 30A and the external male thread 31J, penetrating the valve stem 30A in a direction perpendicular to the axial direction.

[0012] Although the valve stem 30A in this embodiment is made of metal, it may be made of a non-metallic material such as resin as long as it is made of a rigid material. Furthermore, the shapes of the outer and inner surfaces of the valve stem 30A are not limited to those described above.

[0013] The valve core 20 is a general-purpose component commonly used in various tire valves, and has the following structure. Specifically, the valve core 20 includes a support tube 21, a movable shaft 24 penetrating the support tube 21, and a compression coil spring (not shown). The support tube 21 is configured by rotatably connecting a cylindrical head 23 to one end of a cylindrical base 22. A bridge portion 23B spanning the opening of the cylindrical head 23 is provided on the end face of the cylindrical head 23 opposite the cylindrical base 22. A through-hole (not shown) is formed in the bridge portion 23B coaxially with the central axis of the cylindrical head 23. A thread portion 23N is formed on the outer surface of the cylindrical head 23. The outer diameter of the cylindrical base 22 gradually decreases with increasing distance from the cylindrical head 23.

[0014] The movable shaft 24 penetrates the support cylindrical portion 21, with both ends protruding from the support cylindrical portion 21. One end of the movable shaft 24 protruding from the cylindrical base portion 22 is provided with a flange portion having a thin dish structure, within which a sealing member (not shown) is received to form the valve body 24A. The other end of the movable shaft 24 is provided with a spring retaining flange 24C. A compression coil spring (not shown) inserted through the movable shaft 24 is sandwiched between the bridge portion 23B and the spring retaining flange 24C, and the elastic force of the compression coil spring presses the valve body 24A against the end face opening of the support cylindrical portion 21.

[0015] The valve core 20 is inserted into the valve stem 30A from the tip end side, and is assembled so that the outer surface of the cylindrical base portion 22 and the inner surface of the valve stem 30A are in close contact (a so-called metal seal state) by the threaded engagement of the threaded portion 23N of the cylindrical head portion 23 with the female threaded portion 32A of the valve stem 30A. The valve core 20 allows fluid to pass from the tip end to the base end of the valve stem 30A, but prevents fluid from passing in the opposite direction.

[0016] The press-fit member 40A is tubular and covers the valve stem 30A from the base end of the tip-side large diameter portion 31A to a midpoint of the second medium diameter portion 31H. The press-fit member 40A is made of vulcanized rubber and is molded onto the outside of the valve stem 30A and vulcanized-bonded to the valve stem 30A. The inner surface of the press-fit member 40A, extending from a midpoint of the first medium diameter portion 31G to a position closer to the base end, defines a medium diameter hole 49A that is slightly larger than the first medium diameter portion 31G, and provides a gap between the press-fit member 40A and the outer surface of the valve stem 30A. The base end surface of the press-fit member 40A is recessed in a stepped manner at its center to form a central recess 49B, and the diameter tapers off from the central recess 49B toward the medium diameter hole 49A.

[0017] The outer surface of the press-fit member 40A is composed of, in order from the tip side, a small-diameter portion 41, a tapered portion 42, a triangular ridge 43, a fitting portion 44, and a base-end flange portion 45. The small-diameter portion 41 has an outer diameter slightly larger than that of the base end of the tip-side large-diameter portion 31A of the valve stem 30A and extends to a position just before the flange 31F. The outer diameter of the fitting portion 44 is larger than that of the small-diameter portion 41, and the outer diameter of the base-end flange portion 45 is even larger than that of the fitting portion 44. The tapered portion 42 gradually increases in diameter from the base end of the small-diameter portion 41 toward the tip end of the fitting portion 44. The base end of the tapered portion 42 is slightly larger than the fitting portion 44 and then tapers slightly toward the fitting portion 44, forming a triangular ridge 43 that protrudes slightly from the tip end of the fitting portion 44. Further, a step surface 45D between the fitting portion 44 and the base end flange portion 45 is recessed in the shape of an annular groove, and the outer edge portion forms a thin lip 45L.

[0018] The tire valve main body 10X is press-fitted into the valve mounting hole 92 of the tire wheel 90 as follows. That is, as shown in Figure 1, the valve mounting hole 92 penetrates, for example, a position close to the cylindrical portion 91A of a tapered portion 91B that protrudes diagonally from the outer edge of a cylindrical portion 91A parallel to the central axis of the rim 91 of the tire wheel 90. The inner edge of the tire 94 engages with the outer edge of the tapered portion 91B that is distant from the cylindrical portion 91A.

[0019] The tire valve main body 10X is inserted into the valve mounting hole 92 from the tip side on the inner surface of the rim 91. The tapered portion 42 of the press-fitting member 40A then abuts against the opening edge of the valve mounting hole 92. When the tire valve main body 10X is then pressed into the valve mounting hole 92, as shown in FIG. 1 , the portion of the press-fitting member 40A that is proximal to the tapered portion 42 is stretched in the axial direction and deformed to reduce its diameter, so that the tapered portion 42 is press-fit into the valve mounting hole 92. The stepped surface 45D of the proximal flange portion 45 then abuts against the inner surface of the rim 91, positioning the tire valve main body 10X relative to the tire wheel 90. In this state, the portion of the fitting portion 44 of the press-fitting member 40A that is positioned outside the rim 91 forms a tapered surface portion 46 that continues from the triangular ridge 43, forming an intermediate flange portion 47 that includes the tapered portions 42, 46 back-to-back. Furthermore, the press-fit member 40A is stretched as described above during press-fitting, so that the base end surface of the press-fit member 40A is positioned in front of the air vent 33.

[0020] Although the valve stem 30A in this embodiment is made of vulcanized rubber, it may be made of a material other than vulcanized rubber, such as a soft resin, as long as it is made of elastomer.

[0021] The condition monitoring device 60 has a structure in which a battery and a circuit board (not shown) on which a pressure sensor, a temperature sensor, and a wireless circuit are mounted are packaged in a housing 61 as shown in Fig. 2. A mounting hole 62 penetrates the housing 61, and one end of the mounting hole 62 is stepped to reduce its diameter. The base end of the valve stem 30A is inserted into the larger diameter side of the mounting hole 62 so that the end face of the valve stem 30A abuts against the stepped surface of the mounting hole 62. A bolt 63 is inserted into the mounting hole 62 from the smaller diameter side and tightened into the female thread portion 32B of the valve stem 30A, thereby fixing the condition monitoring device 60 to the base end of the valve stem 30A.

[0022] The method of fixing the condition monitoring device 60 to the valve stem 30A is not limited to the structure described above. For example, a male thread may be formed on the outer surface of the base end of the valve stem 30A, and a female thread that screws into the male thread may be provided on the condition monitoring device 60. Although the tire valve 10A of this embodiment is provided with the condition monitoring device 60, it is not necessarily required to do so.

[0023] The tilt restricting member 50A is made of, for example, metal and is cup-shaped as shown in FIG. 2 . The bottom 52 of the cup has a central female thread 54N that is threaded onto the male thread 31J of the valve stem 30A. That is, the female thread 54N serves as a "retaining portion" that engages with the valve stem 30A in a retaining manner. The tilt restricting member 50A is assembled in a state in which it covers the base-end flange 45 of the press-fit member 40A that is press-fitted into the valve mounting hole 92. The specific structure of the tilt restricting member 50A will be described below, assuming that the press-fit member 40A is press-fitted into the valve mounting hole 92.

[0024] 1 , the tilt restricting member 50A includes an outer tube portion 53 that covers the side surface of the base-end flange portion 45, a bottom portion 52 that covers the base-end surface of the base-end flange portion 45, and a central bulge portion 55 that protrudes in a stepped manner from the center of the bottom portion 52 into the outer tube portion 53. A female thread portion 54N is formed in the center of the central bulge portion 55. The female thread portion 54N is threaded onto the male thread portion 31J of the valve stem 30A, and the tip surface of the outer tube portion 53 is overlapped with the inner surface of the rim 91. For example, the inner surface of the outer tube portion 53 is in close contact with the outer surface of the base-end flange portion 45, and the central bulge portion 55 is loosely fitted into the central recess 49B. In addition, approximately half of the air vent 33 is located closer to the base end of the valve stem 30A than the tilting restriction member 50A, and approximately half of the air vent 33 is received inside the central bulge 55 and faces the gap between the central bulge 55 and the valve stem 30A.

[0025] Although the tilt restricting member 50A in this embodiment is made of metal, it does not have to be made of metal as long as it is made of a rigid material, and it may be made of resin or ceramic. The tilt restricting member 50A has a female thread portion 54N that screws onto the male thread portion 31J of the valve stem 30A as a "removal prevention fixing portion," but the removal prevention fixing portion that fixes the tilt restricting member 50A to the valve stem 30A in a non-removal state is not limited to this. For example, the tilt restricting member 50A may have a press-fit portion that is press-fitted into the valve stem 30A as the "removal prevention fixing portion," or a portion that is fixed to the valve stem 30A by adhesive or welding as the "removal prevention fixing portion." In addition, in the tilt restricting member 50A of this embodiment, the outer tube portion 53 is tightly fitted (i.e., press-fit) to the outer surface of the base-end flange portion 45, while the central bulge portion 55 is loosely fitted in the central recess 49B. However, the outer tube portion 53 may be loosely fitted to the base-end flange portion 45, while the central bulge portion 55 may be press-fitted into the central recess 49B, or both may be loosely fitted, or both may be press-fitted. If at least a portion of the tilt restricting member 50A is press-fitted into the press-fitting member 40A, loosening of the threaded engagement between the male screw portion 31J and the female screw portion 54N can be prevented, and if the entire tilt restricting member 50A is loosely fitted into the press-fitting member 40A, assembly of the tilt restricting member 50A is facilitated.

[0026] This completes the description of the structure of the tire valve 10A of this embodiment. Next, the effects of this tire valve 10A will be described. As described above, in the tire valve 10A of this embodiment, the tilt restricting member 50A and the condition monitoring device 60 are removed from the tire valve main body 10X, and the press-fitting member 40A covering the valve stem 30A is press-fitted into the valve mounting hole 92 of the tire wheel 90. Thereafter, the tilt restricting member 50A and the condition monitoring device 60 are mounted on the valve stem 30A inside the rim 91. Note that, as shown in FIG. 2 , the tilt restricting member 50A and the condition monitoring device 60 may be mounted on the valve stem 30A, and the press-fitting member 40A of the tire valve 10A may be press-fitted into the valve mounting hole 92.

[0027] When a vehicle equipped with a tire wheel 90 travels, centrifugal force due to the rotation of the tire wheel 90 acts on the tire valve 10A. Even if this centrifugal force acts to tilt the tire valve 10A, the tilt-restricting member 50A abuts against the rim 91, restricting the tilt of the tire valve 10A and stably securing the tire valve 10A to the rim 91. Furthermore, the tilt-restricting member 50A is secured in a retaining state by threaded engagement between the female thread portion 54N and the male thread portion 31J of the valve stem 30A. Cooperation between the tilt-restricting member 50A and the press-fitting member 40A prevents the tire valve 10A from slipping out of the rim 91, enhancing the retaining strength of the tire valve 10A against the rim 91. Furthermore, because the tilt-restricting member 50A is positioned inside the rim 91, it is protected from collision with foreign objects and has excellent durability.

[0028] Furthermore, because the tilt-restricting member 50A is cup-shaped, it can restrict tilting of the tire valve 10A relative to the rim 91 in all directions and has greater strength than, for example, a cantilever-shaped member. Moreover, because the tilt-restricting member 50A is cup-shaped to cover the base-end flange portion 45, it is possible to prevent the tilt-restricting member 50A from making the tire valve 10A bulky.

[0029] Furthermore, since the outer tube portion 53 of the tilting restriction member 50A is tightly and frictionally engaged with the base end flange portion 45, loosening of the screw connection between the female screw portion 54N and the male screw portion 31J is prevented, and the position of the tilting restriction member 50A relative to the valve stem 30A is stabilized, thereby stabilizing the tilting restriction by the tilting restriction member 50A.

[0030] In the tire valve 10A of this embodiment, the condition monitoring device 60 is attached to the base end, which increases the effect of centrifugal force. Therefore, the tilt restriction effect of the tilt restriction member 50A described above is greater than in a tire valve without the condition monitoring device 60. Furthermore, the tilt restriction member 50A is provided with a central bulge 55, and at least a portion of the vent hole 33 penetrating the valve stem 30A from inside to outside is positioned so as to face the gap between the inner surface of the central bulge 55 and the valve stem 30A. This allows the position of the vent hole 33 to be closer to the tip of the valve stem 30A, thereby shortening the valve stem 30A accordingly. This reduces the effect of centrifugal force on the condition monitoring device 60.

[0031] 3A and 3B, the second embodiment differs from the first embodiment in the structure of a tilt restricting member 50B. This tilt restricting member 50B has a structure that eliminates a portion of the tilt restricting member 50A of the first embodiment. Specifically, for example, the tilt restricting member 50B is configured such that, at the center, the female thread portion 54N of the tilt restricting member 50A remains in an area where it is threadedly engaged with the male thread portion 31J to prevent it from coming loose, and the bottom portion 52 and the outer tube portion 53 cover only the upper portion of the base-end flange portion 45 shown in FIG. 3A.

[0032] 4A, the vent hole 33 is formed across the male thread portion 31J and the base-side small diameter portion 31I of the valve stem 30A. The tilt restriction member 50C of this embodiment does not have a central bulge 55, but has a structure in which a female thread portion 54N is provided at the center of the bottom portion 52.

[0033] [Fourth Embodiment] In this embodiment, shown in Fig. 4B, the valve stem 30A does not have an air vent 33 penetrating from the side, but instead has an air vent 63A formed in the center of a bolt 63 for fixing the condition monitoring device 60 to the valve stem 30A. A tilt restriction member 50C similar to that of the third embodiment is attached to the valve stem 30A. According to this embodiment, the valve stem 30A can be made shorter by the amount corresponding to the absence of the air vent 33 penetrating from the side of the valve stem 30A.

[0034] 5, the tilt restricting member 50E has a structure in which a female thread portion 54N is provided in the center of the disk. A countersunk hole 95 is formed in the inner surface of the rim 91, the countersunk hole 95 being concentric with the valve mounting hole 92. The base flange portion 45 of the press-fit member 40A is received in the countersunk hole 95, and the outer edge of the tilt restricting member 50E abuts against the opening edge of the countersunk hole 95. Instead of providing the countersunk hole 95, one or more protrusions may be formed on the inner surface of the rim 91 laterally facing the base flange portion 45, and the outer edge of the tilt restricting member 50E may abut against the protrusion or protrusions.

[0035] <Supplementary Notes> Below, the group of features extracted from the above embodiment will be explained, indicating, as necessary, the effects, etc. Note that, for ease of understanding, the corresponding configurations in the above embodiment will be indicated in parentheses as appropriate below, but these group of features are not limited to the specific configurations indicated in parentheses.

[0036] [Feature 1] A tire valve (10A) comprising: a valve stem (30A) configured to accommodate a valve core (20); an elastomer press-fitting member (40A) covering the outer surface of the valve stem (30A) and configured to be press-fit into a valve mounting hole (92) in a rim (91) of a tire wheel (90) from the inner surface side of the rim (91) and attached in a state in which the rim (91) penetrates inward and outward; and a tilt-restricting member (50A to 50C, 50E) having a retaining fixing portion (54N) fixed to the valve stem (30A) in a retaining state and having a portion overlapping the inner surface of the rim (91).

[0037] [Feature 2] The tire valve (10A) according to Feature 1, further comprising: a male thread portion (31J) formed on an outer surface of the valve stem (30A); and a female thread portion (54N) as the retaining fixing portion (54N) formed on the tilt restriction member (50A to 50C, 50) and threadedly engaging with the male thread portion (31J).

[0038] [Feature 3] The tire valve (10A) according to Feature 1 or 2, wherein the press-fitting member (40A) is provided with a base-end flange portion (45) that has an outer diameter larger than that of the valve mounting hole (92) and faces an inner surface of the rim (91), the tilt-restricting member (50A) is cup-shaped to cover the base-end flange portion (45) of the press-fitting member (40A) when it is press-fitted into the valve mounting hole (92), and the removal-prevention fixing portion (54N) is located at the center of a bottom portion (52) of the cup shape.

[0039] [Feature 4] The tire valve (10A) according to Feature 3, wherein the tilt restriction member (50A) is configured to be loosely fitted into the base end flange portion (45).

[0040] [Feature 5] The tire valve (10A) according to Feature 3, wherein the tilt restriction member (50A) is configured to be press-fitted into the base end flange portion (45).

[0041] [Feature 6] The tire valve (10A) according to any one of Features 3 to 5, wherein the tire valve (10A) is provided with a central recess (49B) formed by recessing a central portion of the base end surface of the base end flange portion (45), the tilt restriction member (50A) is provided with a central bulge portion (55) that bulges from a bottom portion (52) of the cup shape toward the inside of the central recess (49B) and has the anti-removal fixing portion (54N) at its center, and at least a part of the vent hole (33) penetrating the valve stem (30A) from inside to outside is positioned so as to face a gap between the inner surface of the central bulge portion (55) and the valve stem (30A).

[0042] [Feature 7] The tire valve (10A) according to any one of Features 1 to 6, further comprising: a condition monitoring device (60) attached to a base end of the valve stem (30A) for monitoring a condition inside the tire (94).

[0043] [Feature 8] A tilt restriction member (50A to 50C, 50E) used in the tire valve (10A) according to any one of Features 1 to 7.

[0044] The tire valve of Feature 1 is attached to a tire wheel by press-fitting an elastomer press-fit member covering the valve stem into a valve mounting hole in the tire wheel rim. The tilt-restricting member is then fixed to the valve stem in a non-removable state, with a portion of the tilt-restricting member overlapping the inner surface of the rim, thereby restricting tilt of the tire valve and stably fixing it to the rim. Furthermore, because the tilt-restricting member is fixed to the valve stem in a non-removable state, cooperation between the tilt-restricting member and the press-fitting member prevents the tire valve from slipping out of the rim, increasing the strength with which the tire valve is prevented from slipping out of the rim. Furthermore, because the tilt-restricting member is positioned inside the rim, it is protected from collisions with foreign objects and has excellent durability.

[0045] The anti-removal fixing portion of the tilt regulating member that is fixed to the valve stem in a non-removal state may be a press-fit portion that is pressed into the valve stem, a bonded portion that is bonded to the valve stem with an adhesive, a welded portion that is fixed by welding, or a female screw portion that screws into the male screw portion of the valve stem as in Feature 2.

[0046] The tilt restricting member may have a structure in which it extends laterally from the valve stem like a cantilever and then bends to abut against the inner surface of the rim, or it may be cup-shaped as in Feature 3. If the tilt restricting member is cup-shaped as in Feature 3, it can restrict tilting of the tire valve relative to the rim in all directions and the strength of the tilt restricting member is increased. Furthermore, if the tilt restricting member is cup-shaped to cover the base-end flange portion as in Feature 3, it can prevent the tire valve from becoming bulky due to the tilt restricting member.

[0047] The tilt restricting member can be easily assembled if it is configured to be loosely fitted into the base flange portion, as in the tire valve of Feature 4. Furthermore, if the tilt restricting member is configured to be press-fit into the base flange portion, as in the tire valve of Feature 5, the frictional engagement between the tilt restricting member and the base flange portion assists in preventing the tilt restricting member from coming off due to the engagement of the retaining fixing portion, thereby stabilizing the tilt restriction by the tilt restricting member.

[0048] The tilting control member of feature 6 is provided with a central bulge portion that bulges toward the central recess on the base end surface of the base end flange portion, and at least a portion of the air vent that penetrates the valve stem from inside to outside is positioned so that it faces the gap between the inner surface of the central bulge portion and the valve stem, thereby allowing the position of the air vent to be closer to the tip side of the valve stem and thereby shortening the valve stem.

[0049] In a tire valve in which a condition monitoring device for monitoring the condition inside the tire is attached to the base end of the valve stem, as in the tire valve of Feature 7, the centrifugal force is large, and therefore the effect of the tilt restriction by the tilt restriction member described above is greater than in a tire valve in which a condition monitoring device is not attached.

[0050] Although the present specification and drawings disclose specific examples of the technology included in the scope of the claims, the technology described in the claims is not limited to these specific examples, but also includes various modifications and variations of the specific examples, and also includes parts of the specific examples taken out alone.

[0051] 10A Tire valve 10X Tire valve body 20 Valve core 30A Valve stem 31J Male thread portion 33 Vent hole 36 Cap 40A Press-fit member 45 Base end flange portion 49B Central recess 50A to 50C, 50E Tilt restriction member 54N Female thread portion (removal prevention fixing portion) 55 Central bulge portion 60 Condition monitoring device 90 Tire wheel 91 Rim 92 Valve mounting hole 94 Tire

Claims

1. A tire valve comprising: a valve stem configured to accommodate a valve core; an elastomer press-fit member that covers the outer surface of the valve stem and is configured to be press-fit into a valve mounting hole in a tire wheel rim from the inner surface of the rim so as to be attached in a state where it penetrates the rim from inside to outside; and a tilt-restricting member that has a removal-prevention fixing portion that is fixed to the valve stem in a removal-prevention state and has a portion that overlaps the inner surface of the rim.

2. A tire valve as described in claim 1, comprising: a male thread portion formed on the outer surface of the valve stem; and a female thread portion formed on the tilt restriction member and serving as the retaining fixing portion that screws into the male thread portion.

3. A tire valve as claimed in claim 1 or 2, wherein the press-fitting member is provided with a base-end flange portion that has an outer diameter larger than that of the valve mounting hole and faces the inner surface of the rim, and the tilt restriction member is cup-shaped to cover the base-end flange portion of the press-fitting member when pressed into the valve mounting hole, and the anti-detachment fixing portion is located at the centre of the bottom of the cup shape.

4. The tire valve according to claim 3, wherein the tilt restriction member is configured to be loosely fitted into the base end flange portion.

5. The tire valve according to claim 3, wherein the tilt restriction member is configured to be press-fitted into the base end flange portion.

6. A tire valve as claimed in any one of claims 3 to 5, wherein the tire valve is provided with a central recess formed by recessing the central portion of the base end surface of the base end flange portion, the tilt restriction member is provided with a central bulge portion that bulges from the bottom of the cup shape towards the inside of the central recess and has the anti-detachment fixing portion at its center, and at least a part of the air hole that penetrates the valve stem from inside to outside is positioned so as to face the gap between the inner surface of the central bulge portion and the valve stem.

7. A tire valve according to any one of claims 1 to 6, further comprising a condition monitoring device attached to the base end of the valve stem for monitoring conditions inside the tire.

8. A tilt restricting member used in a tire valve according to any one of claims 1 to 7.

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