JP4325798B2 - Tubeless tire rim assembly aid - Google Patents

Description

  The present invention relates to a rim assembly aid for tubeless tires, and more particularly to a rim assembly aid for tubeless tires that can be used for many different rim sizes with only one assist device.

  In general, the rim assembly operation of a tubeless tire is performed by fitting one bead portion of a pneumatic tire to one rim flange side of the rim and dropping the other bead portion into a well portion, and in that state compressed air inside the tire. The bead portion that has been dropped into the well portion is gradually moved toward the other rim flange side while filling. At this time, if a large amount of compressed air leaks from the gap between the bead portion and the rim flange, there is a problem that the rim assembly operation cannot be performed smoothly.

  On the other hand, tires shipped from a factory are often stacked and temporarily stored in a normal warehouse or the like with the sidewall portions in the horizontal direction. Since the weight of the tires stacked in this way is added and loaded sequentially from the upper side toward the lower side tire, the side wall portion of the tire on the lower side is subjected to large compression deformation in the axial direction. . For this reason, tires released from storage cannot be restored to their original shape due to the creep phenomenon of rubber because the heel distance between the left and right bead portions is reduced, and the gap between the bead portion and the rim flange when assembling the rim. Is excessive, and there is a problem that air filling becomes difficult.

As measures against such problems, in order to prevent air leakage during inflation, the gap between the tire and the rim flange is sealed with an inflation aid made of an annular tube (see Patent Document 1), or the tire and the rim flange. There is a proposal of sandwiching an inflation aid made of a flat belt ring (see Patent Document 2). However, all of these proposals require that a wide variety of inflation aids be prepared for each rim size, and their use is avoided from the standpoint of storage space, and the current situation is that they are not widely used. . Therefore, there was room for improvement from the viewpoint of easy storage.
Japanese Utility Model Publication No. 59-93903 JP-A-4-345507

  An object of the present invention is to provide a rim assembly aid for a tubeless tire that eliminates such problems and enables use on a rim of many different sizes with only one aid.

To achieve the above object, a tubeless tire rim assembly aid of the present invention comprises a flexible tubular body provided with a plurality of injection holes along the longitudinal direction of the tubular body, and one end of the tubular body. The other end portion can be connected to a compressed air source, and a locking means having a half-pipe-shaped lock portion is fixed to the end portion on the sealing side, and the half-tube lock the intermediate portion of the tubular body part to permit locking to removably fit anywhere in the longitudinal direction, the tubular body from the locking position during the locking up the seal-side end portion The area is configured to be annular , and a sealing member for sealing the injection hole is attached to the tubular body area from the connecting portion to the compressed air source to the position where the area is locked to the locking means. Features.

  The tubeless tire rim assembling tool of the present invention has a flexible tubular body in which a plurality of injection holes are formed in the longitudinal direction, and an intermediate portion is detachably locked to a locking member fixed to an end portion thereof. In addition, since the locking portion can be arbitrarily changed, the size of the annular forming portion can be variously changed according to the locking portion, so that only one rim assembly aid can be used. Can be used on many different rim sizes.

  Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a bottom view showing a rim assembly aid for a tubeless tire according to an embodiment of the present invention.

  In FIG. 1, the rim assembly assisting tool 1 is composed of a flexible tubular body 3 provided with a plurality of injection holes 2 along the longitudinal direction of the tubular body, and seals one end 3 a of the tubular body 3. At the same time, the other end portion 3b can be connected to the compressed air source 5, and the locking means 4 is fixed to the sealing side end portion 3a. The intermediate portion of the tubular body 3 is fixed to the locking means 4 in the longitudinal direction. It is configured so that it can be locked at a location, and at the time of locking, the tubular body region from the locking location to the sealing side end portion 3a is annular.

As shown in FIGS. 2 (a) and 2 (b), the locking means 4 includes a half tubular locking portion 4a into which the tubular body 3 is fitted, and an intermediate portion of the tubular body 3 is provided in the locking portion 4a. And the tubular body 3 is locked so as to be in an annular form. It is desirable to provide an opening / closing valve (not shown) at the connecting portion between the end 3 b of the tubular body 3 and the compressed air source 5.

  By configuring in this way, the size of the annular forming portion can be variously changed according to the locking portion, so that it can be used for many different rims with only one rim assembly aid. can do.

  FIG. 3 is a cross-sectional view for explaining the air flow at the time of assembling the rim. Air leaking from the tubeless tire T collides with the compressed air discharged from the injection hole 2 of the tubular body 3 of the rim assembling auxiliary tool 1. A state in which a so-called air curtain S is formed is shown. By forming the air curtain S in this way, it is possible to prevent the air from leaking from the inside of the tire and to smoothly advance the rim assembly work on the rim R.

In the present invention, a sealing member (not shown) for sealing the injection hole 2 is provided in the tubular body region Q (see FIG. 1) from the connecting portion to the compressed air source 5 to the portion locked by the locking means. Attached to prevent discharge of compressed air . Accordingly, it is possible to prevent unnecessary discharge of the compressed air and to easily adjust the pressure of the air discharged from the injection hole 2 in the annular portion.

  The form of the sealing member that covers the injection hole 2 is not limited as long as it is a detachable and extendable tubular body that covers the outer periphery of the tubular body 3. For example, the outer diameter of the tubular body 3 is not limited. A flexible hose having a substantially equal inner diameter to that of the flexible hose is preferably used.

  In the present invention, it is preferable that a support for holding the annular form is detachably attached to a portion where the tubular body 3 is formed in an annular shape. That is, as shown in FIG. 4, the tubular body 3 may be used by being locked to a support 6 having an arm 6 a that can expand and contract in the radial direction. As shown in FIG. 5, the support 6 may be configured such that the arm 6a slides in the radial direction according to the rim size and expands or contracts. The arm 6 a of the support 6 is formed with a locking portion 6 b for fitting the tubular body 3. As a result, the intermediate portion of the tubular body 3 is dropped from the locking portion 4a of the locking means 4 under the influence of the compressed air pumped from the compressed air source 5 to the tubular body 3 when the rim is assembled, and the tubular body 3 is in the air. It is possible to prevent the situation of starting to dance.

  As described above, the rim assembly assisting tool 1 of the present invention can freely set the diameter of the annular tubular body 3 by changing the fitting position with the locking means 4 in the intermediate portion of the tubular body 3. The rim diameter is 12 to 25 inches by setting the overall length of the tubular body 3 to 950 to 2000 mm while it is an auxiliary tool and can be used for many different size rims. It can be used for tires of all sizes corresponding to the rim. In addition, when two types of rim assembly aids for passenger cars and large vehicles are used, the total length of the tubular body 3 is 950 to 1400 mm (corresponding to a rim having a rim diameter of 12 to 18 inches) and 1400 to 2000 mm. (It corresponds to a rim having a rim diameter of 18 to 25 inches).

It is a bottom view which shows the rim assembly auxiliary tool of the tubeless tire by embodiment of this invention. (A) is an enlarged view which shows the form of the coupling tool vicinity in the rim | limb assembly auxiliary tool of FIG. 1, (b) is XX arrow sectional drawing of (a). It is sectional drawing for demonstrating the flow of the air at the time of rim assembly. It is a bottom view which shows the rim assembly aid of the tubeless tire by other embodiment of this invention. It is a YY arrow sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rim assembly assistance tool 2 Injection hole 3 Tubular body 4 Locking means 4a, 4b Locking part 5 Compressed air source 6 Support tool 6a Arm

Claims (3)

It consists of a flexible tubular body provided with a plurality of injection holes along the longitudinal direction of the tubular body, and seals one end of the tubular body and allows the other end to be connected to a compressed air source. the the sealing end to secure the locking means having a locking portion of the half tube, removably middle portion of the tubular body to the engaging portion of the semi-split tubular in the longitudinal direction of the arbitrary point and enables locking to fit, tube region from the locking position to said sealing end portion is configured to be annular at the time of locking, and the connecting portion to the compressed air source A tubeless tire rim assembling aid in which a sealing member for sealing the injection hole is provided in a tube region up to a position where the locking means is locked . The tubeless tire rim assembling tool according to claim 1 , wherein the sealing member is formed of a telescopic tubular body covering an outer periphery of the tubular body. The rim assembly aid for a tubeless tire according to claim 1 or 2 , wherein a support for holding the annular form is detachably attached to a portion where the tubular body is formed in an annular shape.

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