JP2006264604A - Tire rim assembling auxiliary tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire rim assembling auxiliary tool capable of enhancing safety while simplifying a structure. <P>SOLUTION: The tire rim assembling auxiliary tool 1 is used when a bead part 21 of the tire is assembled to the rim 10. The tool 1 has a first tool part 2 inserted between a rim flange 11 and the bead part 21 of the tire 20 to be rim-assembled and a second tool part 4 arranged at the outside of the rim flange 11. The first tool part 2 and the second tool part 4 can be engaged with the rim flange 11 by clamping the rim flange 11 from both sides by them. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tire rim assembling jig used when assembling a tire to a rim, and more particularly to a tire rim assembling jig that improves the safety while simplifying the structure.

  For heavy-duty pneumatic tires used for trucks and buses, and pneumatic tires used for small trucks, tire rim assembling jigs are used for assembling the rim. Conventionally, as such a tire rim assembly auxiliary jig, for example, there is a tire lever (for example, see Patent Document 1).

  While the operator holds the tire lever and inserts the front end of the tire lever between the rim flange and the bead portion of the tire to be assembled, the wheel is rotated by the tire changer so that the tire bead portion is sequentially assembled to the rim. I have to.

Since this tire lever consists of a simple rod-shaped body, there is an advantage that the structure is simple and inexpensive, but on the other hand, a large force that pushes the tire lever outward acts when assembling the rim, causing the auxiliary jig to fall outward In order to avoid this, even if the worker holds the tire lever, it may come off. When the tire lever is detached in this manner, it may hit the worker and be damaged, which is problematic in that it is difficult to ensure safety.
Japanese Utility Model Publication No. 55-36017

  An object of the present invention is to provide a tire rim assembly auxiliary jig capable of improving safety while simplifying the structure.

  The present invention for achieving the above object is a tire rim assembling auxiliary jig used when assembling a bead portion of a tire to a rim, and is a first inserted between a rim flange and a bead portion of a tire to be assembled with a rim. It has a jig part and a second jig part arranged outside the rim flange, and the first jig part and the second jig part can be engaged with the rim flange by sandwiching the rim flange from both sides. It is characterized by that.

  According to the present invention described above, when the wheel is rotated by the tire changer and the bead portions of the tire are sequentially assembled to the rim, a large force is exerted on the first jig portion so that the auxiliary jig is moved outward. Even if it tries to fall down, the second jig part arranged outside the rim flange comes into contact with the rim flange to prevent the fall, so that the auxiliary jig can be detached from the rim flange even when the operator releases his hand. The tire can be assembled to the rim.

  Moreover, since it is only necessary to add the second jig part for sandwiching the rim flange in the first jig part, the structure can be simplified. Therefore, it is possible to prevent the worker from being damaged and to improve the safety of the auxiliary jig while simplifying the structure of the auxiliary jig.

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

  1 to 3 show an embodiment of a tire rim assembling auxiliary jig of the present invention. The tire rim assembling auxiliary jig 1 includes a flange 11 of a rim 10 and a bead portion 21 of a tire 20 that is rim assembled on the front end side. The first rod-shaped body 3 is a first jig portion 2 inserted between them, and the second rod-shaped body 5 is a second jig portion 4 whose distal end is disposed outside the rim flange 11.

  The first rod 3 and the second rod 5 are fixed so that the rear side (the left side in FIG. 1) overlaps, so that the first jig portion 2 and the second jig portion 4 on the tip side are bifurcated. The shape is open to the legs. The rear portion fixed by overlapping is a grip portion 6 that is gripped when the operator attaches the auxiliary jig 1.

  The 1st rod-shaped body 3 and the 2nd rod-shaped body 5 are comprised from the material which can exhibit flexibility, and as shown in FIG. 3, the 1st jig | tool part 2 of the tire 20 with which the rim | limb flange 11 and the rim | limb assembly are assembled. When inserted between the bead part 21 and the first jig part 2 and the second jig part 4 having flexibility sandwich the rim flange 11 from both sides, the auxiliary jig 1 is engaged with the rim flange 11. Thus, the rim 10 can be held even when the operator releases his / her hand.

  The material constituting the rod-like bodies 3 and 5 is not particularly limited as long as it can bend and exhibit the function of sandwiching the rim flange 11 between the first jig portion 2 and the second jig portion 4. For example, rubber , Resin, metal and the like.

  In order not to damage the rim 10, rubber or resin can be preferably used. However, when metal is used, the surfaces of the rod-like bodies 3 and 5 should be covered with rubber or resin. Good. Alternatively, the corners of the rod-like bodies 3 and 5 may be chamfered. Rubber or resin may be used alone, but may be used as fiber reinforced rubber or fiber reinforced resin obtained by blending reinforcing fibers.

  As described above, it is preferable that both the first rod-like body 3 and the second rod-like body 5 have flexibility. However, either one may be configured to bend, and at least one of the first rod-like body 3 and the second rod-like body 5 is flexible. Any configuration may be used.

  As a dimension of the auxiliary jig 1, for example, a distance L1 from the rear ends of the rod-like bodies 3 and 5 to the branching position P where the first jig portion 2 and the second jig portion 4 start to open legs is 50 mm to 1000 mm. The distance L2 from the branch position P to the tip can be 50 mm to 500 mm, the widths W of the rod-like bodies 3 and 5 can be 20 mm to 200 mm, and the thickness T can be 10 mm to 100 mm, respectively. Preferably, in terms of operability, the distance L1 is 50 mm to 200 mm, the distance L2 is 50 mm to 150 mm, the width W is 20 mm to 200 mm, and the thickness T is 10 mm to 50 mm.

  In the tire rim assembly auxiliary jig 1 described above, the operator holds the grip portion 6 and, as shown in FIG. 3, the second jig portion 4 is outside the rim flange 11 and the first jig portion 2 is the rim flange. 11 and the bead portion 21 of the tire 20 to be assembled with the rim. The first jig portion 2 and the second jig portion 4 having flexibility sandwich the rim flange 11 from both sides so that the auxiliary jig 1 is engaged with the rim flange 11, and the rim even if the operator releases the hand. The auxiliary jig 1 is held at 10.

  In this state, the wheel is rotated by the tire changer. As a result, when the bead portion 21 of the tire 20 is sequentially assembled to the rim 10, a large force is exerted on the first jig portion 2 so that the auxiliary jig 1 falls in the direction indicated by the arrow X. Although the second jig portion 4 arranged outside the rim flange 11 is in contact with the rim flange 11 to prevent the rim flange 11 from falling down, the auxiliary jig 1 is attached to the rim flange even when the operator releases his / her hand. The tire 20 can be assembled to the rim 10 without detaching from the rim 10.

  Further, since the second jig part 4 for sandwiching the rim flange 11 only needs to be added to the first jig part 2, the structure becomes simple. Accordingly, it is possible to prevent the operator from being damaged while simplifying the structure of the auxiliary jig 1 and to improve the safety during the rim assembling work.

  4 to 6 show another embodiment of the tire rim assembly auxiliary jig of the present invention, and these auxiliary jigs 1 are on the side facing the second jig part 4 at the tip of the first jig part 2. Further, a protrusion 7 that is engaged with the rim flange 11 is provided. The auxiliary jig 1 shown in FIG. 4 has a square shape when viewed from the front, the auxiliary jig 1 shown in FIG. 5 has a semicircular shape, and the auxiliary jig 1 shown in FIG. In this way, by providing the projection 7 to be engaged with the rim flange 11 at the distal end of the first jig portion 2, the projection 7 is engaged with the rim flange 11 as shown in FIG. Can be increased.

  8 and 9 show still another embodiment of the tire rim assembly auxiliary jig of the present invention, and these auxiliary jigs 1 slide on the surface 2a of the first jig portion 2 on the side in contact with the rim flange 11. A stop portion 8 is provided. The auxiliary jig 1 shown in FIG. 8 has a non-slip portion 8 formed on the entire surface 2a of the auxiliary jig shown in FIG. 1, and the auxiliary jig 1 shown in FIG. 9 protrudes from the surface 2a of the auxiliary jig shown in FIG. Non-slip portions 8 are provided on a part of the surface 7a and the surface 2a of the protruding portion 7 provided.

  The anti-slip portion 8 may adopt any configuration as long as the anti-slip portion 8 is configured to be non-slipable with respect to the rim flange 11 that comes into contact. For example, a rubber layer having a surface with fine unevenness, a paper A safety walk such as a file may be attached to the surface 2 a of the first jig portion 2 or the surface 7 a of the projection portion 7.

  Thus, by providing the anti-slip | skid part 8 in the front-end | tip part of the 1st jig | tool part 2, the force latched with respect to the rim flange 11 can be raised, and the holding function of the auxiliary jig 1 can be improved further.

  In the above embodiment, the auxiliary jig 1 fixes the two rod-like bodies 3 and 5 in the above embodiment, but the rod-like bodies 3 and 5 may be integrated.

  Further, as shown in FIG. 10, the first jig part 2 is pivotally connected to the rod-like body 5, and a spring 9 is provided between the first jig part 2 and the second jig part 4 that can be freely opened and closed. The first jig part 2 and the second jig part 4 may sandwich the rim flange 11 from both sides by the elastic force of the spring 9. Alternatively, conversely, the second jig portion 4 is pivotally connected to the rod-shaped body 3, and a spring 9 is interposed between the first jig portion 2 and the second jig portion 4 that can be freely opened and closed. It may be. When it is set as such a structure, the 1st jig | tool part 2 and the 2nd jig | tool part 4 do not need to be a structure which has flexibility.

It is a front view showing one embodiment of a tire rim assembly auxiliary jig of the present invention. It is a bottom view of the tire rim assembly auxiliary jig of FIG. It is explanatory drawing which shows the state which attached the tire rim assembly auxiliary jig | tool of FIG. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention. It is explanatory drawing which shows the state which attached the tire rim assembly auxiliary jig of FIG. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention. It is a front view which shows other embodiment of the tire rim assembly auxiliary jig of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire rim assembly auxiliary jig 2 1st jig | tool part 3 1st rod-shaped body 4 2nd jig | tool part 5 2nd rod-shaped body 6 Grip part 7 Protrusion part 8 Antiskid part 10 Rim 11 Rim flange 20 Tire 21 Bead part

Claims (6)

  A tire rim assembly auxiliary jig used when assembling a tire bead portion to a rim, a first jig portion inserted between the rim flange and the tire bead portion to be assembled to the rim, and an outer side of the rim flange A tire rim assembly auxiliary jig having a second jig part disposed on the rim flange, the first jig part and the second jig part being able to engage with the rim flange by sandwiching the rim flange from both sides.   The tire rim assembly auxiliary jig according to claim 1, wherein the first jig part and the second jig part are bifurcated.   The tire rim assembly auxiliary jig according to claim 1 or 2, wherein at least one of the first jig part and the second jig part has flexibility.   The tire rim assembly auxiliary jig according to claim 1, 2 or 3, wherein the first jig part and the second jig part are made of rubber or resin.   The tire rim assembly auxiliary jig according to claim 1, 2, 3, or 4, wherein a protrusion that engages with a rim flange is provided at a tip of the first jig. The tire rim assembly auxiliary jig according to claim 1, 2, 3, 4, or 5, wherein a slip prevention portion is provided on a surface of the first jig portion that contacts the rim flange.

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