JPS6140563Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a puncture repair tool for tubeless tires, more specifically, a rubber plug is stuffed into a hole in a punctured part of a tubeless tire, and when the punctured part is repaired, the punctured part is repaired. This invention relates to a puncture repair tool that facilitates the insertion of the rubber plug by cutting a hole in the part, such as a nail hole.

Conventionally, this type of repair tool has a handle attached to a sharp-pointed punching tool, and when repairing a tubeless tire puncture, hold the handle in your hand and rotate the punching tool in forward and reverse directions while drilling the tubeless tire. The method used was to push the punch into the puncture hole, cut the puncture hole, and then, after pulling out the punch, fill the cut hole with a rubber plug. However, with such repair tools, when pushing the punch into a puncture hole and cutting it, the punch is constantly clamped by the elastic force of the tubeless tire, so when pushing the punch, A large amount of force is required to rotate the punch in the forward and reverse directions when pulling out the puncture, which poses a problem in that it requires a great deal of effort to repair a puncture.

In addition, since the drilling tool is generally composed of a tapered shaft body, the diameter of the hole is influenced by the amount of pushing of the drilling tool into the tubeless tire. The drilling tool is pushed all the way to its base, and even when adjusting the amount of pushing, the adjustment is done based on the intuition of the operator. Therefore, when filling a hole with a rubber shaft, the diameter of the hole may be too large or too small for the thickness of the shaft, and in such cases, puncture repair may be necessary. It becomes even more difficult.

In view of the above circumstances, this invention is designed to separate the handle and the drilling tool by providing a chuck mechanism for gripping the drilling tool on the handle side, and also to enable the chuck mechanism to which the drilling tool is attached to rotate the handle in forward and reverse directions. The chuck mechanism is rotated intermittently only in the forward direction or in the reverse direction, thereby reducing the labor required to puncture tubeless tires.In addition, the chuck mechanism and handle are integrated, making it possible to rotate the chuck intermittently only in the forward direction or in the reverse direction. Furthermore, a spacer is fitted onto the punching tool to restrict the amount of pushing into the tubeless tire, thereby reducing the thickness of the rubber plug stuffed into the hole. It is an object of the present invention to provide a puncture repair tool that can cut a hole having a diameter that is adapted to the size of the hole.

Next, this invention will be explained according to the illustrated embodiment.

In the puncture repair tool 1 shown in FIG.
2 shows a cylindrical support made of steel pipe,
A butterfly-shaped handle 3 is fixed to one end of this support rod 2. The support rod 2 has a built-in intermittent rotation feed mechanism (not shown) having a well-known configuration, and its rotating shaft 4 protrudes from the other end of the supporting rod 2. A chuck mechanism 5 of known construction is provided. That is, the intermittent rotational feeding mechanism selectively switches the rotary shaft 4 between a state in which it can only rotate in the forward direction with respect to the support rod 2, a state in which it can only rotate in the reverse direction, and a state in which forward and reverse rotation is prevented. For example, it may consist of a pair of ratchet and lock mechanisms. A switching knob 6 for selectively switching between the three states of the intermittent rotation feed mechanism faces a rectangular window 7 formed in the outer wall of the support rod 2. In the illustrated example, the switching knob 6 is arranged near the handle 3, and by reciprocating the switching knob 6 in stages in the axial direction of the support rod 2, At position A, the rotary shaft 4 can only rotate in the forward direction, at the second stage position B, the rotary shaft 4 is prevented from rotating in the forward and reverse directions, and at the third stage position C, the rotary shaft 4 can only rotate in the reverse direction. These three states can be switched to make it possible. Further, the chuck mechanism is constructed by dividing the tip of the rotary shaft 4 into a plurality of claw pieces in the circumferential direction, and by threading the tightening nut 5a into and out of these divided claw pieces. The structure is such that the diameter of the insertion hole formed by the split claw piece can be expanded or contracted.

Reference numeral 8 indicates a punching tool, and the punching tool 8 has a tip end 8a having a sharp point, and a shaft portion 8b having a tapered shape. Further, as clearly shown in FIG. 2, cutting blade bodies 9 are formed on the outer periphery of the shaft portion 8b at equal angles and extending in a direction along the axis thereof. In the illustrated example, the cutting edge 9a of the cutting blade body 9 is formed only at the edge on the forward rotation side of the tip portion of the cutting blade body 9, and as shown by the arrow The structure is such that cutting is performed only when the blade is rotated in this direction. Note that the base 8c of the punching tool 8 is
It is configured to be detachable from the chuck mechanism 5.

Next, 10 indicates a spacer made of an elastic material such as rubber, and this spacer 10 is made of an elastic material such as rubber.
It is configured as a cylindrical hole having a diameter smaller than the maximum diameter of the punching tool 8, for example, a fitting hole 10a having the same diameter as the diameter of the longitudinal center portion of the shaft portion 8b of the punching tool 8, as shown in FIG. As shown by the line, it is externally fitted at a predetermined position in the longitudinal direction of the punching tool 8,
It is clamped and fixed as shown in Figure 2.

On the other hand, FIGS. 3 and 4 show a plug 11 that is stuffed into a hole drilled in a tube tire using the tool 1.

This plug 11 is made of naturally vulcanized rubber, and has a flexible shaft portion 11b having a circular or diamond-shaped cross section integrally protruding from the center of one side of a soft and flexible thin plate portion 11a. . A metal cap 12 in the form of a split 12a is placed over the shaft portion 11b. As is clear from the drawing, this cap 12 is formed into a tapered tape shape, and is attached to the shaft body portion of the plug 11.
1b, and only its proximal end portion is fitted onto the outside of the shaft portion 11b over substantially the entire length thereof. That is, the lengths of the shaft portion 11b of the plug 11 and the cap 12 are determined in relation to the thickness of the tubeless tire, and the shaft portion 11b is slightly longer than the thickness of the tubeless tire.
The length of each cap 12 is determined to be sufficiently longer than its thickness.

Further, the shaft portion 11b of the plug 11 has expanded diameter portions 11c formed on its outer periphery at required pitches in the axial direction, and correspondingly, expanded diameter portions 12b are formed in the cap 12 as well.

Next, the procedure for repairing a puncture will be explained according to FIGS. 5 to 7.

If the tubeless tire 13 becomes punctured due to, for example, a nail 14 being stuck in the tubeless tire 13, remove the tubeless tire 13 from the axle (not shown) of the automobile and remove the puncture as shown in FIG. 5a. After searching for the punctured part, use the tool 1 to push the punch 8 into the nail hole 15 of the punctured part, as shown in FIG. form.

Cutting and drilling tubeless tire 13 1
6, hold the handle 3 of the tool 1 in your hand and push the punch 8 into the nail hole 15 while rotating the handle 3 in forward and reverse directions. In this case, if the switching knob 6 is set to the first stage position A shown in FIG. When the clamped punching tool 8 is rotated in the forward direction X and the handle 3 is returned to the opposite direction, the support rod 2 integrated with the handle 3 rotates idly relative to the punching tool 8, so the punching tool 8 is not rotated in the opposite direction. . Therefore, even if the punching tool 8 is clamped by the tubeless tire 13, the force required to overcome the clamping force and rotate the punching tool 8 is required to rotate the handle 3 in the forward direction. Since this is only necessary, almost no effort is required when rotating the handle 3 in the opposite direction. By repeating the forward and reverse rotation of the handle 3 as described above, a perforation 16 is formed over the entire length of the nail hole 15 of the tubeless tire 13, that is, the entire thickness of the tubeless tire 13. At this time, the diameter of the perforation 16 is regulated by a spacer 10 fitted onto the perforation tool 8 in advance. That is, with the spacer 10 elastically held at a predetermined position in the longitudinal direction of the punching tool 8, by pushing the punching tool 8 until the spacer 10 contacts the outer surface of the tubeless tire 13, the punching tool 8 becomes tapered. Due to the shape of the hole 16, the hole 16 has a diameter corresponding to the amount of pushing. Next, in order to pull out the punching tool 8 from the tubeless tire 13, the switching knob 6 is operated with the hand holding the handle 3 and set to the third stage position C. As a result, the punching tool 8 rotates in the opposite direction Y shown in FIG. 2 only when the handle 3 is rotated in the opposite direction, contrary to when it is pushed in, so that it can be easily pulled out from the punching hole 16.

On the other hand, after the perforation 16 is formed as shown in FIG. 5c, the perforation 16 is formed as shown in FIG.
Insert the cap 1 from the inside of the tubeless tire 13.
The shaft portion 11b of the plug 11 with the plug 2 attached thereto is pushed in by hand through the cap 12. In this case, the cap 12 is made of metal,
Moreover, since the cap 12 is constructed as a split piece, the cap 12 is smoothly reduced in diameter in accordance with the elastic force of the tubeless tire 13 without being caught on the wall surface of the perforation 16. Note that at this time, it is not necessary to bring the thin plate portion 11a of the plug 11 into close contact with the back surface of the tubeless tire 13, and it is sufficient to push it in to the extent that the tip of the cap 12 protrudes toward the outer surface of the tubeless tire 13. Next, as shown in FIG. 5E, the tip of the cap 12 is pulled out to the outside of the tubeless tire 13 using hands or pliers. As a result, the shaft portion 11b of the plug 11 is initially pulled outward of the tubeless tire 13 together with the cap 12, and accordingly, the shaft portion 11b is drawn into the perforation 16, and the thin plate The portion 11a is closely attached to the back surface of the tubeless tire 13 along its shape. Therefore, the thin plate portion 11a acts as a stopper, and the cap 12 is separated from the shaft portion 11b. In this state, the shaft portion 1 of the plug 11
1b is a tubeless tire 1 only at its tip.
This protruding portion protrudes from the outer surface of 3, so this protruding portion is cut off to form the states shown in Fig. 5f and Fig. 7. The puncture repair is now complete.

In addition, as shown in FIGS. 3 and 4,
A release paper 17 is pasted on one surface of the thin plate portion 11a of the plug 11 for the purpose of protecting the adhesive surface of the thin plate portion 11a with the tubeless tire 13, and the release paper 17 is peeled off during use. desirable. Further, when the plug 11 is used, a rubber adhesive is applied to the thin plate portion 11a and the shaft portion 11b in order to improve the bondability with the tubeless tire 13.

According to the embodiment described above, not only can the drilling operation of the tubeless tire 13 be easily and quickly performed with very little effort, but also the shaft portion 11b of the plug 11 and the tubeless tire 13 can be easily and quickly drilled.
The state of close contact with the wall surface of the perforation 16 is
Since the enlarged diameter portion 11c formed in the plug 1 is maintained well by being elastically deformed, a complete repair can be performed without causing air leakage, etc.
When inserting the shaft portion 11b of the tubeless tire 13 into the hole 16 of the tubeless tire 13, this is done through the metal cap 12.
There is no risk that b will bend, break, or tear.

As detailed above, according to this invention, by fitting a cylindrical spacer in a predetermined position of the punching tool to control the amount of pushing of the punching tool into the tubeless tire, The diameter of the hole to be formed in the hole can be easily and reliably determined to suit the thickness of the rubber shaft to be packed into the hole, and the spacer is smaller than the maximum diameter of the tapered hole punching tool. Since the spacer is made of an elastic material having a hole with a small inner diameter, in order to fit this spacer into a predetermined position of the punching tool, it is only necessary to insert it into the punching tool and fix it with elastic force. , the device can perform the repair quickly, which in turn leads to faster puncture repair. In addition, when pushing the punch into or pulling out the tubeless tire, connect them so that the punch rotates in the forward or reverse direction only when the handle rotates in the forward or reverse direction. Since it is equipped with an intermittent rotational feeding mechanism, the labor required to repair a puncture is significantly reduced compared to conventional ones.

[Brief explanation of drawings]

Figure 1 is a side view showing an embodiment of this invention, Figure 2 is a side view showing an embodiment of this invention.
The figure is an enlarged cross-sectional view of Fig. 1, and Fig. 3
The figure is a perspective view of the plug, Figure 4 is a side view of the plug and cap separated, Figures 5 a to f are explanatory diagrams showing the puncture repair procedure, and Figure 6 is the main part in Figure 5 d. FIG. 7 is an enlarged cross-sectional view of the main part in FIG. 5f. 1... Puncture repair tool, 2... Support rod, 3... Handle, 4... Rotating shaft, 5... Chack mechanism, 6...
Switching knob, 8...Drilling tool, 10...Spacer, 13...Tubeless tire, 16...Drilling.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A handle fixed to one end of a cylindrical support rod, a rotating shaft protruding from the other end of the supporting rod, and a rotating shaft built into the supporting rod to rotate the rotating shaft. For the support rod,
an intermittent rotational feed mechanism that can be selectively switched between a state in which only forward rotation is possible, a state in which only reverse direction rotation is possible, and a state in which forward and reverse rotation is prohibited; and a chuck mechanism provided at the tip of the rotating shaft. , a tapered punching tool that is attached to and detached from the chuck mechanism, and a cylindrical spacer that is fitted onto the punching tool and regulates the amount of pushing of the punching tool into the tubeless tire; A puncture repair tool for a tubeless tire, characterized in that the tool is made of an elastic material and has a fitting hole with an inner diameter smaller than the maximum diameter of the punch. 2. A switching knob for selectively switching the intermittent rotation feed mechanism between a state in which only forward rotation is possible, a state in which only reverse direction rotation is possible, and a state in which forward and reverse rotation is prohibited is arranged near the handle on the support rod. A puncture repair tool for tubeless tires according to claim 1 of the utility model registration claim.