Tubeless tyre puncture repair tool

Abstract

To provide a puncture repair tool for tubeless tires that enables the outside of the tire to repair a puncture in the tire.SOLUTION: A tubeless tire puncture repair tool for inserting a blocking member 1 into a puncture hole P in a tire T. The blocking member has a shaft part 10 and an adhesive part 11 provided at the end of the shaft part, the puncture repair tool is equipped with a repair tool body 2, a holding chuck 3 that is detachably supported by the repair tool body and holds a blocking member, and a lock member 4 that fixes the holding chuck to the repair tool body, and the holding chuck has a tubular section 31 that accommodates the shaft of the blocking member on its inner side and the outer side of the holding chuck inserts into the puncture hole of the tire.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a puncture repair tool used when repairing a puncture in a tubeless tire. [Background technology]

[0002] There are two methods for repairing a puncture that has occurred in a vehicle tire: a method of repairing from the inside of the tire and a method of repairing from the outside of the tire. As the former, for example, as shown in Patent Document 1, there is a method in which a repair patch with rubber glue applied is applied to the puncture hole part from the inside of the tire. As shown in Patent Document 2, there is a method in which a hollow tubular member is inserted into the puncture hole part from the outside of the tire, the shaft of an umbrella-shaped repair tool is inserted into this tubular member from the inside of the tire, and finally the tubular member is pulled out from the outside of the tire. As the latter, as shown in Patent Document 3, there is a method in which a repair tool called a stem is driven into the outside of the tire using a press-in machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 579576 [Patent Document 2] Patent Gazette (JP-59-3282) [Patent Document 3] Publicly-opened utility model publication (JP Patent Publication 62-143507)

[0004] However, if the puncture must be repaired from the inside of the tire as shown in Patent Document 1 and Patent Document 2, it is necessarily an absolute requirement to remove the tire from the wheel or rim when repairing the puncture. In this regard, if a tubeless tire is punctured while traveling, it is practically difficult to remove the tire from the wheel or rim at the site. In addition, for example, in the case of a road racer type bicycle, even if it is possible to remove the tubeless tire from the rim, the tire is very thin, so in order to mount the tire again, air must be rapidly injected with a compressor or the like, otherwise the tire beads will not ride up the rim and the tire will not inflate. In other words, the tire cannot even be mounted. In this regard, it is unlikely that a compressor or the like is in hand when riding a normal bicycle, so it is practically impossible to remount a tubeless tire at the site. For these reasons, there has been a demand for a puncture repair tool that allows punctures to be repaired from the outside of the tire without removing the tire from the wheel or rim, and that allows this to be done easily and quickly. On the other hand, according to the invention described in Patent Document 3, although the puncture can be repaired from the outside of the tire, a relatively bulky device called a press-fitting machine is required. In this respect, it is unlikely that a press-fitting machine is carried while riding a bicycle or the like, so it is difficult to complete puncture repair on-site. In addition, when focusing on bicycle tires, as mentioned above, the tires are thin, so it is difficult to drive a stem into the tire using a press-fitting machine in the first place. Furthermore, the press-fitting machine inevitably has a complex configuration, which is a problem in that it is expensive to manufacture the press-fitting machine. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, in order to solve the above-mentioned problems, the present invention aims to provide a puncture repair tool for tubeless tires that has a relatively simple structure and a blocking member made of an elastic material attached to it, and that can be inserted from the outer surface of the tire to the inner surface of the tire to repair the puncture. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a puncture repair tool for tubeless tires that repairs a puncture hole in the tire by inserting a blocking member formed from an elastic material into the puncture hole, wherein the blocking member has an axial portion of a predetermined length and an umbrella-shaped adhesive portion provided at the tip of the axial portion, and the puncture repair tool comprises a repair tool main body, a retaining chuck that is removably supported on one end side of the repair tool main body and holds the blocking member, and a locking member that fixes the retaining chuck to the repair tool main body, and the retaining chuck has a tubular portion that accommodates the axial portion of the blocking member and is inserted into the puncture hole in the tire.

[0007] In the present invention, it is preferable that at least the tubular portion of the holding chuck is composed of two semi-cylinders, and that the holding chuck is formed so as to be able to hold the shaft portion of the closing member between the two semi-cylinders.

[0008] Furthermore, in the present invention, it is preferable that a thin-walled portion recessed into a narrow groove shape is formed on the outer surface of the shaft portion of the blocking member, and an abutment portion is formed on the inner surface of the tubular portion of the holding chuck to abut a portion of the shaft portion closer to the base end than the thin-walled portion, so that when the shaft portion is extended, the shaft portion is cut via the thin-walled portion.

[0009] Furthermore, in the present invention, it is preferable that the shank of the blocking member has a wedge portion that bulges outward near the adhesive portion and has a tapered tip. Effect of the Invention

[0010] In the present invention, the axial portion of the closing member made of an elastic material is housed in the tubular portion of the holding chuck, and the annular portion can be inserted into the punctured hole in the tire, so that when a tubeless tire is punctured, the puncture can be repaired from the outside of the tire without removing the tire. Moreover, the puncture repair work can be performed very simply and quickly.

[0011] According to the invention as defined in claim 2, since the shaft portion of the closing member can be clamped between the two semi-cylinder members, the closing member can be easily and reliably attached to the holding chuck.

[0012] Furthermore, according to the invention as defined in claim 3, the shaft portion of the blocking member can be easily cut off, eliminating the need for tools such as scissors, which contributes to simpler and quicker puncture repair.

[0013] Furthermore, according to the invention of claim 4, the wedge portion of the blocking member serves as a guide when inserting the blocking member into the puncture hole, and also serves as a preventive measure against removal after the puncture has been repaired, which also contributes to making puncture repair easier and quicker. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a side view of a repair tool body (a puncture repair tool for a tubeless tire) with a blocking member attached. [Diagram 2] FIG. 2 is a side cross-sectional view of a repair tool body (a puncture repair tool for a tubeless tire) with a blocking member attached. [Diagram 3] FIG. 2 is an exploded perspective view of a blocking member and a repair tool main body (a puncture repair tool for a tubeless tire). [Figure 4] 1A is a side view of a closing member, FIG. 1B is a side view of a holding chuck, and FIG. 1C is a cross-sectional view of the holding chuck with the closing member attached. [Diagram 5] 13A and 13B are diagrams showing the process of attaching the blocking member to the repair tool body. [Figure 6] A diagram showing the process of repairing a puncture using a puncture repair tool. [Figure 7] A diagram showing the process of repairing a puncture using a puncture repair tool. [Figure 8] A diagram showing the process of repairing a puncture using a puncture repair tool. [Figure 9] 13A and 13B are diagrams showing another embodiment of a rod-shaped body provided on a lock cap. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of a puncture repair tool for a tubeless tire according to the present invention will be described with reference to the drawings. Note that the present invention is a puncture repair tool mainly intended for tubeless tires of bicycles, so the following description will be given of an example in which the tool is applied to tubeless tires of bicycles. However, the puncture repair tool for a tubeless tire according to the present invention (hereinafter referred to as the "puncture repair tool") can also be applied to tubeless tires of vehicles other than bicycles. FIG. 1 is a side view of the puncture repair tool, FIG. 2 is a side cross-sectional view of the puncture repair tool, and FIG. 3 is an exploded perspective view of the puncture repair tool. The puncture repair tool for a tubeless tire according to the present embodiment is used by attaching a blocking member 1 formed of an elastic material that seals a puncture hole P in the tire, and is roughly composed of a repair tool main body 2, a holding chuck 3 that is detachably supported on one end side of the repair tool main body 2 and holds the blocking member 1, a lock cap (lock member) 4 that fixes the holding chuck 3 to the repair tool main body 2, and a base end cap 5 that is attached to the other end side of the repair tool main body 2. In this embodiment, the "tip" refers to the left side of the puncture repair tool shown in Figure 1, i.e., the side of the puncture repair tool to which the blocking member 1 is attached, and the "base end" refers to the opposite side.

[0016] The blocking member 1 is made of an elastic material, specifically, elastic rubber, and is formed by an axial portion 10 and an umbrella-shaped adhesive portion 11 provided at one end (tip) of the axial portion 10, as shown in FIG. 4(a). Of these, the axial portion 10 is formed in a round bar shape of a predetermined length (13 mm). The axial portion 10 has a main axial portion 10a having a substantially uniform diameter (1.5 mm) from its one end (tip) to its other end (base end), but the base end and the tip end each have a portion having a different diameter from the main axial portion 10a. Specifically, the base end of the axial portion 10 has a larger diameter (2 mm) than the main axial portion 10a, that is, a contact protrusion (thick width portion) 10b that bulges out in a flange-like shape in the width direction from the main axial portion 10a. In addition, a thin-walled portion 10c having a smaller diameter (width) than the main axial portion 10a is formed on the inner side of the contact protrusion 10b of the axial portion 10. Furthermore, at a portion slightly inward (base end side) from the tip of shaft portion 10, wedge portion 10d is formed, which bulges outward in a generally truncated cone shape. Here, to explain thin-walled portion 10c and wedge portion 10d in more detail, thin-walled portion 10c is formed at the base end of main shaft portion 10a, i.e., slightly inward (tip side) from the base end, by recessing its outer surface in a groove shape, forming a portion with a smaller diameter than main shaft portion 10a. The smallest diameter of thin-walled portion 10c is 1 mm. On the other hand, wedge portion 10d is tapered to have a larger diameter (2 mm) than main shaft portion 10a and a smaller diameter toward the tip, forming a portion at the most distal end that is the same diameter as main shaft portion 10a. On the other hand, umbrella-shaped adhesive portion 11 is integrally formed at the tip of shaft portion 10. The umbrella shape referred to here means that when the shaft 10 is perpendicular to the ground and the adhesive part 11 is positioned on top, the shape is generally circular in plan view, the lower surface 11a is flat, and the upper surface is slanted downward outward. The diameter of the adhesive part 11 is set to 9 mm. The upper surface of the adhesive part 11 near the center is a sharp protrusion 11b that is steeply slanted from the center outward, and the outer side of this is a thin, gently slanted surface 11c that is gently slanted downward.

[0017] In the above example, the shaft portion 10 of the blocking member 1 is formed in a round bar shape, but it does not necessarily have to be a round bar shape, and so long as it is formed in a bar shape, it can be modified into a square bar shape, etc. In the above example, the adhesive portion 11 of the blocking member 1 is formed in a circular shape when viewed from above, but it does not necessarily have to be a circle, and it can be modified into a polygonal shape when viewed from above, etc.

[0018] The repair tool body 2 is made of metal and is formed of a cylindrical body 20 and a cylindrical chuck support 21 that is protruding from one end (tip) of the body 20 and has a smaller diameter (width) than the body 20. In this embodiment, the outer diameter of the body 20 is set to 20 mm, and the outer diameter of the chuck support 21 is set to 10.7 mm. The length of the body 20 in the longitudinal direction is set to 35 mm, and the length of the chuck support 21 in the longitudinal direction is set to 12 mm. The body 20 is a part that is held by hand when using the puncture repair tool, and the chuck support 21 is a part that supports the holding chuck 3. The body 20 is formed in a cylindrical shape with a hollow inside, and the hollow space 22, which is the hollow part, can be used as a space for storing the blocking member 1, as shown in FIG. 2. Moreover, one end (tip) of the body 20 is a closed part 20a, and the other end (base) is an open opening. Furthermore, a through hole 23 is drilled in the center of the closed part 20a of the body 20. Furthermore, a female screw part 24 is formed on the inner surface of the opening side of the body 20, i.e., the inner surface of the base end. On the other hand, the chuck support part 21 protruding from the closed part 20a of the body 20 to the tip side is formed in a hollow cylindrical shape with an open tip, and the support hole 25, which is the hollow part, is a part that houses and fits the supported part 33 of the holding chuck 3 described later. Furthermore, a male screw part 26 is formed on the outer peripheral surface of the base end of the chuck support part 21. The through hole 23 of the closed part 20a described above is a hole for inserting a rod or the like into the support hole 25 of the chuck support part 21 to remove the sealant S or dust when the sealant S or dust adheres to the support hole 25 of the chuck support part 21.

[0019] In the above example, the body portion 20 and the chuck support portion 22 are both cylindrical, but they do not necessarily have to be cylindrical and may be formed into a square tube shape. In other words, the shapes of the body portion 20 and the chuck support portion 22 can be freely selected as long as they are formed into a columnar shape.

[0020] As shown in Figs. 3 and 4, the holding chuck 3 is composed of two metal semi-cylindrical bodies 3a and 3b of the same shape, which are joined (connected) by a rubber O-ring 30. The semi-cylindrical bodies 3a and 3b have a semicircular cross section, with the tip end portion having a small diameter (narrow width), the base end portion having a larger diameter (wider width) than the tip end portion, and the middle portion having the largest diameter (widest width). When the semi-cylindrical bodies 3a and 3b are joined together, the tip end portion is a small-diameter tubular portion 31 that receives and fits the shaft portion 10a of the blocking member 1 and is inserted into the puncture hole P of the tire, and the base end portion is a tubular supported portion 32 that is received and supported in the support hole 25 of the chuck support portion 21 of the repair tool main body 2. The portion between the tubular portion 31 and the supported portion 32 is a flange portion 33 that protrudes outward. Furthermore, the holding chuck 3 in the state where the semi-cylindrical bodies 3a and 3b are combined has a hole 34 formed in the widthwise center thereof, penetrating from the tip to the base end. That is, grooves 34a and 34b recessed in a semicircular shape from the tip to the base end are provided in the widthwise center of the flat parts of the semi-cylindrical bodies 3a and 3b, and the hole 34 is formed by combining the semi-cylindrical bodies 3a and 3b. In addition, a narrow groove 35 recessed in an annular shape along the width direction is provided around the outer surface of the supported part 32 in the state where the semi-cylindrical bodies 3a and 3b are combined, at a position closer to the flange part 33. The semi-cylindrical bodies 3a and 3b can be combined by fitting an O-ring 30 into the narrow groove 35. In addition, an isosceles triangular gap 36 with the apex angle positioned on the tip side is formed in the base end of the supported part 32 in the state where the semi-cylindrical bodies 3a and 3b are combined. That is, the surface of the cylindrical halves 3a, 3b, which corresponds to the supported portion 32, and faces the cylindrical halves 3a, 3b when they are joined together, is a gently downwardly inclined surface 36a, 36b toward the base end as shown in FIG. 4(b), and this becomes a gap 36 when the cylindrical halves 3a, 3b are joined together. The downwardly inclined surface 36a, 36b starts at a point on the base end side, about one third of the total length. The length of the supported portion 32 in the longitudinal direction is the same as the length of the chuck support portion 21 of the repair tool body 2, and the outer diameter of the supported portion 32 is approximately the same as the inside dimension of the internal space of the chuck support portion 21.Therefore, when the supported portion 32 is accommodated in the chuck support portion 21, the supported portion 32 is fitted into the chuck support portion 21 with almost no gap. Furthermore, the tip of the tubular portion 31 in the state where the half-cylinders 3a and 3b are combined is goosenecked so as to correspond to the shape of the wedge portion 10d of the shaft portion 10 of the blocking member 1 accommodated therein. Furthermore, the grooves 34a and 34b of the cylindrical halves 3a and 3b, i.e., the hole 34 in the state where the cylindrical halves 3a and 3b are combined, have different diameters between the tip-side hole 34A and the base-side hole 34B. That is, among the holes 34 in the state where the cylindrical halves 3a and 3b are combined, the diameter of the tip-side hole 34A located in the tubular portion 31 is smaller than the diameter of the base-side hole 34B. Specifically, the diameter of the tip-side hole 34A is approximately the same as the outer diameter of the main shaft portion 10a of the shaft portion 10 in the blocking member 1, and the diameter of the base-side hole 34B is approximately the same as the outer diameter of the abutting protrusion 10b of the shaft 10. The tip of the tip-side hole 34A is shaped to match the shape of the wedge portion 10d of the shaft portion 10. The longitudinal length of the hole 34 is the same as the length from the tip of the shaft portion 10 of the blocking member 1 to the tip surface of the abutting protrusion 10b of the tip-side hole 34A. Therefore, when the blocking member 1 is housed in the holding chuck 3, the shaft portion 10 of the blocking member 1 from its tip to the tip surface of the abutting protrusion 10b fits into the tip-side hole 34A, and the abutting protrusion 10b fits into the base-side hole 34B. As a result, the tip surface of the contact protrusion 10b comes into contact with a step surface (contact portion) 38 that is the boundary between the tip side hole 34A and the base side hole 34B, as shown in FIG. 4(c).

[0021] In the above example, the holding chuck is formed by combining two half cylinders, but the present invention is not limited to this. Only the tubular portion of the holding chuck may be formed by two half cylinders. In other words, the object of the present invention can be achieved as long as at least the tubular portion of the holding chuck can be divided into two. In the above example, an O-ring is used as a means for joining the two half cylinders, but the present invention is not limited to this. Various means can be used. Furthermore, the holding chuck formed by two half cylinders may be combined by simply overlapping the two half cylinders and then housing them in the chuck support part of the repair tool body.

[0022] The lock cap 4 is made of metal like the repair tool body 2, and is formed in a cylindrical shape with a receiving hole 40 that penetrates the center in the longitudinal direction, and the tip portion is tapered to a smaller diameter toward the tip. That is, the base end side of the lock cap 4 has a substantially rectangular cross section, and the tip side has a substantially trapezoidal cross section. In addition, the tip of the lock cap 4 is formed with a chuck pressing piece 41 that protrudes inwardly from the opening in a flange-like shape. Furthermore, a female screw portion 42 is formed on the inner peripheral surface of the base end portion of the lock cap 4.

[0023] The base end cap 5 is made of metal like the repair tool body 2, and is formed of a lid portion 50 having the same outer diameter as the body portion 20 of the repair tool body 2, and a cylindrical screw portion 51 connected to the tip side of the lid portion 50 and having a smaller diameter than the lid portion 50. A male screw portion 52 is formed on the outer circumferential surface of the screw portion 51. The male screw portion 52 of the screw portion 51 is screwed into the female screw portion 24 formed on the inner surface of the base end side of the body portion 20 of the repair tool body 2, so that the opening of the base end of the repair tool body 2 can be closed by the base end cap 5. Furthermore, a rod-shaped body 53 extending to the tip side is attached to the center of the inner surface of the screw portion 51 of the base end cap 5. The rod-shaped body 53 is made of a metal round rod with a sharp tip, and the part other than the base end is a file formed with fine irregularities. The rod-shaped body 53 is used to form the puncture hole P, so that the diameter gradually increases from the tip. The length of the rod-shaped body 53 is such that its tip reaches from the through hole 23 drilled in the closing portion 20a of the body portion 20 of the repair tool body 2 to the hole 34 of the holding chuck 3 when the base end cap 5 is attached to the repair tool body 2, as shown in Figure 2.

[0024] In the above example, the puncture repair tool is made of metal, but the present invention is not limited to this and it is of course possible to form the puncture repair tool from synthetic resin or other materials.

[0025] Next, a method of using the puncture repair tool configured as described above will be described. When using the puncture repair tool, as shown in FIG. 6, it is first necessary to find where the puncture hole P is in the tire T and to grasp the position of the puncture hole P. Once the position of the puncture hole P is identified, the base end cap 5 is removed from the repair tool main body 2, and the cone-shaped tip of the rod-shaped body 53 provided on the base end cap 5 is inserted into the puncture hole P to block the puncture hole P. At this time, the rod-shaped body 53 gradually becomes thicker from the tip so as to correspond to the diameter of the puncture hole P, and this can be utilized to stop the outflow of air. Then, with the rod-shaped body 53 still inserted in the puncture hole P, 60 to 80 psi of air is injected into the deflated tire. After this is completed, the blocking member 1 is set in the puncture repair tool in the procedure shown in FIG. 5. Specifically, first, the lock cap 4 is removed from the repair tool body 2, and the holding chuck 3 housed in the chuck support part 21 of the repair tool body 2 is pulled out from the chuck support part 21 by grasping its tubular part 31. Then, the supported part 32 of the pulled out holding chuck 3 is pinched with fingers. Here, since the supported part 32 of the holding chuck 3 has an isosceles triangular gap 36 formed at its base end, the supported part 32 pinched with fingers moves to close the gap 36, and the tip part of the tubular part 31 of the holding chuck 3 expands accordingly. Then, the shaft part 10 of the blocking member 1 is inserted from the tip of the expanded tubular part 31. At this time, the shaft part 10 is inserted until the lower surface 11a of the adhesive part 11 of the blocking member 1 abuts against the tip of the tubular part 31 of the holding chuck 3. When the shaft portion 10 of the blocking member 1 is firmly fitted in the tubular portion 31, the force of the fingers pinching the chuck support portion 21 of the holding chuck 3 is released, and the holding chuck 3 is returned to its normal state, that is, a state in which a gap 36 exists in the chuck support portion 21 of the holding chuck 3. As a result, the shaft portion 10 of the blocking member 1 is sandwiched between the grooves 34a, 34b of the cylindrical halves 3a, 3b, and the shaft portion 10 is accommodated in the hole 34 of the holding chuck 3. After the blocking member 1 is attached to the holding chuck 3 in this way, the supported portion 32 of the holding chuck 3 is then inserted into the support hole 25 of the chuck support portion 21 of the repair tool body 2, and the holding chuck 3 is attached to the repair tool body 2. Next, the lock cap 4 is attached to the repair tool body 2 again.At this time, the tubular portion 31 of the holding chuck 3 to which the blocking member 1 is attached protrudes upward from the receiving hole 40 of the lock cap 4. When the lock cap 4 is fitted to the repair tool body 2, the tip side surface of the flange portion 33 of the holding chuck 3 is pressed by the chuck pressing piece 41 of the lock cap 4, as shown in Fig. 2, so that the holding chuck 3 is completely fixed to the repair tool body 2. In the above explanation, an example has been shown in which the rod-shaped body 53 is inserted into the puncture hole P and air is injected into the tire T, and then the blocking member 1 is set in the puncture repair tool, but this procedure may be reversed.

[0026] After this is completed, next, as shown in FIG. 6(d), a sealant S is applied to the front and back of the adhesive portion 11 of the blocking member 1. Then, the rod-shaped body 53 inserted into the puncture hole P of the tire T is pulled out, and the sharp protrusion 11b at the tip of the adhesive portion 11 of the blocking member 1 is pressed against the puncture hole P of the tire T, as shown in FIG. 7(e). At this time, since the sharp protrusion 11b is cone-shaped, it is possible to prevent air from leaking out from the puncture hole P. From this state, the adhesive portion 11 of the blocking member 1 is then strongly and straightly pressed into the inside of the tire T by the tubular portion 31 of the holding chuck 3. At this time, since the center of the adhesive portion 11 of the blocking member 1 is the sharp protrusion 11b, the blocking member 1 is smoothly guided from the puncture hole P into the inside of the tire. In addition, since the adhesive portion 11 of the blocking member 1 has a thin inclined surface that is gradually inclined downward on the outside, as shown in FIG. 7(f), it is woven toward the tubular portion 31 of the holding chuck 3 and narrows, and is guided into the inside of the tire T without stress. In other words, in the process of the blocking member 1 entering the inside of the tire T, the adhesive portion 11 is smoothly inserted without causing any problems such as being caught on the outer surface of the tire T. Then, when the adhesive portion 11 is completely inside the tire T, the adhesive portion 11 returns to its original shape, that is, an open umbrella state, due to its elastic force. After it is confirmed that the adhesive portion 11 of the blocking member 1 has certainly entered the inside of the tire T by the above operations, this time the repair tool main body 2 is slowly pulled up, and the lower surface 11a of the adhesive portion 11 is brought into close contact with the inner surface of the tire T, as shown in FIG. 7(h). From here, the repair tool main body 2 is further pulled to put the adhesive portion 11 of the blocking member 1 under tension, and this state is maintained for about 10 seconds. By leaving this time, the sealant S applied to the adhesive portion 11 of the blocking member 1 will become familiar, and the adhesive portion 11 will firmly block the puncture hole P. Then, once it has been confirmed that the sealant S has secured the lower surface 11a of the adhesive portion 11 to the inner surface of the tire T, the repair tool body 2 is pulled even harder to tear off the shaft portion 10 of the blocking member 1 at its thin portion 10c. The above steps complete the puncture repair, but it would be a major problem if the blocking member 1 came off when the vehicle was driven again after the repair.In this regard, the wedge portion 10d is provided on the shaft portion 10 of the blocking member 1, and this wedge portion 10d exerts a wedge effect in the puncture hole P of the tire T, and thus strengthens the joint, so that the above-mentioned problem can be avoided. According to the present invention, a puncture can be repaired by performing the above-mentioned simple work. That is, when the repair tool body 2 is pulled toward the front side with the lower surface 11a of the adhesive portion 11 of the blocking member 1 fastened to the inner surface of the tire T, the shaft portion 10 of the blocking member 1 is stretched by its elastic force within the tubular portion 31 of the holding chuck 3. At this time, the tip surface of the abutment protrusion 10b of the shaft portion 10 abuts against the abutment portions 38, 38 within the tubular portion 31, and the movement toward the tip side is completely restricted. Therefore, a strong force is applied to the thin-walled portion 10c of the stretched shaft portion 10, and the thin-walled portion 10c that cannot withstand this force is cut off. In this way, by pulling the repair tool main body 2 toward the user, the shaft portion 10 of the blocking member 1 is cut, so there is no need to prepare a separate tool such as scissors, and the tire bank can be repaired using only the puncture repair tool. Moreover, with the puncture repair tool according to the present invention, the puncture can be repaired from the outer surface side of the tire, and the repair work can be completed relatively easily and quickly. Therefore, for example, even if a tire is suddenly punctured while riding a bicycle, it is possible to repair the puncture at the destination and resume riding after the repair.

[0027] In the above embodiment, the lock cap is described as an example of a lock member for fixing the holding chuck to the repair tool body, but the present invention is not limited to this. In other words, it is of course possible to adopt other means as long as the holding chuck can be reliably fixed to the repair tool body. In addition, in the above embodiment, when the shaft of the blocking member is extended and cut at its thin-walled portion, the abutment protrusion of the shaft abuts against a step surface (abutment portion) that is a boundary between the hole on the tip side and the hole on the base side of the holding chuck, but the present invention is not limited to this. For example, a convex portion (abutment portion) that protrudes so as to face the thin-walled portion of the shaft of the blocking member is provided on the inner surface of the tubular portion of the holding chuck, and when the shaft of the blocking member is extended, the convex portion abuts against a portion on the base side of the thin-walled portion of the shaft.

[0028] FIG. 9 shows another embodiment of the rod-shaped body 60 attached to the lock cap 4. Unlike the rod-shaped body 53 described above, this rod-shaped body 60 does not have a file formed on its outer circumferential surface. The rod-shaped body 60 has a cone-shaped tip and two groove-shaped different diameter parts 61, 62 recessed in the circumferential direction in the center. The diameter of the base end side of the rod-shaped body 60 is set to 3.8 mmm, the narrowest part of the different diameter part 61 is set to 3.3 mm, and the narrowest part of the irregular shape part 62 is set to 3.6 mm. In other words, the rod-shaped body 60 has several parts with different diameters, so that when the rod-shaped body 60 is inserted into the puncture hole P, it can freely respond to the size of the diameter of the puncture hole P. [Explanation of symbols]

[0029] 1. Closure member 2 Repair tool body 3 Holding chuck 4 Lock cap (locking component) 10 Shaft 10b Contact protrusion 10c Thin wall part 10d wedge 11 Adhesive part 31 Tubular part 38 Contact part

Claims

1. A puncture repair tool for a tubeless tire that repairs a puncture hole by inserting a closing member made of an elastic material into the puncture hole of the tire, comprising: The blocking member includes a shaft portion having a predetermined length and an umbrella-shaped adhesive portion provided at a tip of the shaft portion, The puncture repair tool includes a repair tool body, a holding chuck that is detachably supported on one end side of the repair tool body and holds the blocking member, and a locking member that fixes the holding chuck to the repair tool body, the holding chuck has a tubular portion that receives the shaft portion of the blocking member inside and has an outside that is inserted into a puncture hole in a tire, A puncture repair tool for tubeless tires, characterized in that the blocking member is formed with a wedge portion that bulges outward near the adhesive portion of the shaft and has a tapered tip.

2. 2. A tubeless tire puncture repair tool as claimed in claim 1, characterized in that at least a tubular portion of the holding chuck is made up of two half-cylinders and is formed so as to be able to clamp the shaft portion of the blocking member between the two half-cylinders.

3. 3. A tubeless tire puncture repair tool as described in claim 1 or claim 2, characterized in that a thin-walled portion recessed into a narrow groove shape is formed on the outer surface of the shaft portion of the blocking member, and an abutment portion is formed on the inner surface of the tubular portion of the holding chuck to abut a portion of the shaft portion closer to the base end than the thin-walled portion, so that when the shaft portion is stretched, the shaft portion is cut via the thin-walled portion.

Images