JP5512201B2 - Balance weight - Google Patents

Description

  The present invention relates to a balance weight, and more particularly to a balance weight that is mounted on a vehicle wheel and corrects a deviation in its weight distribution.

  As a balance weight for mounting on a vehicle wheel to which a rubber tire is attached and correcting the deviation of the weight distribution, a metal clip 11D formed in a U-shaped cross section as shown in the partial longitudinal sectional view of FIG. 5 is used. A balance weight 1D extending from the inside of a lead weight main body 10D is well known, and is fixed by driving the clip 11D with a hammer or the like at a position sandwiching the rim 20a of the wheel 20 It is.

  In the balance weight 1D having such a configuration, lead having a high specific gravity is used for the weight main body 10D, so that even a small one can sufficiently adjust the wheel balance. Moreover, since lead is a soft material, it is difficult to make a dent on the surface portion of the wheel 20 with which the weight main body 10D comes into contact. Therefore, it is difficult to drop off from the wheel 20.

  On the other hand, in recent years, there has been a demand for the development of products that do not use lead from the viewpoint of environmental protection, and in balance weights, zinc alloy, tin alloy, or iron or other non-lead metal is used as the weight body material instead of lead. The one using is increasing. However, when weight bodies are made of such lead-free metals, these are harder than lead and are not easily deformed. In addition, there is a problem that frictional scratches are generated on the wheel surface due to vibrations or fall off.

  In addition, in common with the above-described conventional balance weight, a battery phenomenon occurs when there is a potential difference between the conductive weight body and the material constituting the wheel, so the wheel may be partially disassembled or discharged. This can leave scars on the wheel surface. In addition, since the clip is made of relatively hard metal, it is easy to damage the rim when attaching and detaching, and the clip is plastically deformed to a slightly expanded state when attached once. There is also a problem that the fixing force is not sufficiently exhibited.

  On the other hand, JP 2005-538326 A proposes a balance weight in which the surface of the weight body made of zinc alloy and the clip made of steel are all covered with a resin material, which is non-conductive and more than metal. When the soft resin layer is interposed between the wheel surface and the battery surface, the battery phenomenon is less likely to occur, and it becomes difficult to leave a dent, and the wheel surface is easily adapted.

  However, just providing a resin layer on the entire surface in this way makes it easy for the resin layer on the clip surface to peel off due to the attachment and detachment work to the wheel, and plastic deformation of the clip cannot be avoided, so it is still suitable for repeated use. Absent. In addition, since the balance weight requires labor and a technique for uniformly covering the entire body with a resin film after the clip is attached to the weight body, it tends to be costly as a whole.

JP 2005-538326 A

  SUMMARY OF THE INVENTION The present invention is intended to solve the above-described problems, and it is an object of the present invention to make the balance weight of a vehicle wheel suitable for reuse while making it less likely to damage the wheel at low cost. And

Accordingly, the present invention provides a weight main body that is arranged with a part in contact with the inner peripheral side of the rim, and a weight main body that is extended from the weight main body in a U-shaped cross section and fixes the weight main body to the wheel by sandwiching the rim. In the balance weight of an automobile wheel equipped with a clip, the weight main body is formed of a resin material on the outer surface side and has a metal weight inside, and the clip is entirely made of a resin material, and the weight main body and the clip The clip is formed integrally with the resin material , and the clip has a proximal end portion rising from the rim side end edge of the weight body outer surface facing the front in the mounted state, and the weight body outer surface. Is formed at a distance from the outer surface of the weight body and extends in a direction perpendicular to the circumferential direction of the rim, at least before the top of the step. It is assumed that the reinforcing rib for reinforcing the clip reaching the side is provided, and that this reinforcing rib prevents the hammer from directly hitting the outer peripheral surface of the curved portion of the clip when mounting by hammer driving. It is a feature.

  In this way, the weight body with the metal weight completely covered with resin is made of resin and all the clips are made of resin, and the weight body and clip are made by integral molding of resin, making it simple and low cost In addition to being able to be done, the weight main body and the clip are attached without damaging the wheel, and the resin clip is also suitable for repeated use because it is difficult to be plastically deformed.

In addition, the clip rises in the front direction from the edge of the rim side of the outer surface of the weight body facing the front in the mounted state and forms a step between the outer surface of the weight body and protrudes from the outer surface of the weight body in the circumferential direction of the rim. By having a reinforcing rib that extends in a direction perpendicular to the top of the step and reaches the tip side, it becomes easy to ensure its strength and durability even when it is a thin clip that is easy to insert, and Since the hammer does not directly contact the outer peripheral surface of the curved portion of the clip during mounting, it is easy to prevent the clip from being damaged by the hammering operation.

  According to the present invention in which the outer surface of the weight main body and the clip are formed by resin integral molding, it is possible to make the wheel suitable for reuse while making it difficult to damage the wheel at low cost.

(A) is a front view of the balance weight which is embodiment in this invention, (B) is sectional drawing which follows the XX line of the balance weight of (A). It is a fragmentary longitudinal cross-section which shows the mounting state of the balance weight of FIG. It is a front view which shows the application example of the balance weight of FIG. It is a front view which shows the other application example of the balance weight of FIG. It is a fragmentary longitudinal cross-section which shows the mounting state of the balance weight of a prior art example. It is a fragmentary longitudinal cross-section which shows the mounting state of the balance weight of a prior art example.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1A shows a front view of the balance weight 1A of the present embodiment, and FIG. 1B shows a cross-sectional view taken along line XX of FIG. This balance weight 1A is used for adjusting the balance of a vehicle wheel to which rubber tires are attached. The balance weight 1A is a type in which a clip is driven and fixed to a rim on the front side of the wheel with a hammer or the like.

  Referring to FIG. 1A, a balance weight 1A includes a weight main body 10A that is disposed with a part thereof being in contact with the rim inner peripheral side of the wheel, and extends in a U-shaped (or bowl-shaped) cross section. The weight main body 10A is provided with a clip 11A for fixing the weight main body 10A to the wheel. The weight main body 10A is formed of a predetermined resin material as shown in FIG. The layer 10b has a plate-like metal weight 10a inside, and the clips 11A are all made of a resin material. The weight body 10A and the clip 11A are integrally made of the same resin material. It is characterized by being molded.

  Further, at the front end side of the outer peripheral surface of the clip 11A having a U-shaped cross-section, fin-shaped barbs 111, 112, 113 having a sharply rising tip are aligned in parallel with the width direction of the clip 11A. An arranged return portion 11b is provided. In addition, as this return part 11b, it is preferable from the point of ensuring that it is hard to remove | exclude, and it is preferable that the width | variety of fin-like return | spreads is parallel to each other, and each width | variety corresponds with the width | variety of clip 11A. From the viewpoint of securing a drop-off preventing function, it is preferable that the clip 11A rises at an angle of 40 degrees to 80 degrees from the outer peripheral surface of the clip 11A in the direction opposite to the tip direction.

  Further, as shown in FIG. 1 (B), the clip 11A has a base end portion in the front direction (left direction in the drawing) from the rim side end edge of the outer surface of the weight main body 10A facing the front in a state of being fixed to the wheel. Is provided in a standing state, and a step is formed between the outer surface of the weight main body 10A. The balance weight 1A protrudes from the outer surface of the weight body 10A with a width of two-fifths of the width of the clip 11A, extends in a direction perpendicular to the circumference of the rim and reaches at least the top of the step 11A. Reinforcing ribs 101 are provided to reinforce.

  FIG. 2 shows a state where the balance weight 1 </ b> A of the present embodiment is mounted on the wheel 20. The mounting method is the same as that of the conventional balance weight 1D shown in FIG. 5, and the balance main body 10A has a U-shaped cross section in a position where the upper surface side comes into contact with the inner peripheral surface of the rim 20a of the wheel 20. The opening side of the clip 11A is made to coincide with the rim 20a, and the clip 11A hits the outer peripheral surface of the top of the curved portion protruding from the outer surface of the balance body 10A with a hammer or the like. The rim 20a is sandwiched and fixed while being inserted into the gap formed in the above, and the state shown in FIG. 2 is obtained.

  In this case, the balance main body 10A is covered with the resin layer 10b in the weight 10a provided at the center portion, so that there is no worry of scratching the surface of the wheel 20 during mounting, and the balance body 10A is easily adapted to the wheel 20 surface. It has become. In addition, by using a non-conductive resin, there is no fear of causing a battery phenomenon with the wheel 20. Furthermore, since all of the clips 11A are made of resin, the rim 20a is not damaged when attaching and detaching, and the plastic 11 is hardly deformed. There is no.

  In addition, the reinforcing rib 101 that reinforces the proximal end side of the clip 11A protrudes from the outer surface of the balance body 10A and extends in the vertical direction in the figure to the top of the step by the curved portion of the clip 11A, thereby forming the clip 11A thinly. Even in this case, the strength on the proximal end side is ensured, and the same fixing force as that of the conventional clip made of an elastic metal is exhibited. At the time of mounting, when hitting the vicinity of the top of the step due to the curved portion of the clip 11A with a hammer or the like, the hitting point by the hammer is the tip side portion of the reinforcing rib 101, so that the clip 11A is not easily broken. Yes.

  In addition, in the mounted state of FIG. 2, the tip end side of the clip 11A is inserted between the rim 20a and the tire 21 together with the return portion 11b, but each return 111, 112, 113 of the return portion 11b. The sharp tip of the clip 11 is engaged with the surface of the tire 21 to resist the movement of the clip 11A in the pulling-out direction, and is difficult to drop off from the wheel 20 even if the fixing force due to the clip 11A is not strong. It has become.

  Even if the tip end of the clip 11A is displaced in the removal direction, the clip 11A moves in the direction of insertion gradually due to vibration or the like due to the shape of the return portion 11b, so that it is easy to avoid the dropout. Moreover, when removing this balance weight 1A from the wheel 20, although there is resistance by the return part 11b, it does not damage the tire 21.

  As described above, the balance weight 1A according to the present embodiment is formed by integrating the balance body 10A and the clip 11A, in which the entire periphery of the weight 10a is covered with the resin layer 10b, with a single resin molding. Therefore, it can be manufactured at a relatively low cost. In addition, as a resin material used for this resin integral molding, various materials can be used as long as they have a predetermined level or more of strength / durability and elastic deformability, but due to their high strength / durability, A so-called engineer plastic such as polycarbonate or polyacetal is preferred.

  Further, since the metal weight 10a is completely covered with the resin layer 10b, the material of the weight 10a does not have to be excellent in corrosion resistance such as stainless steel or tin alloy. Soft iron that is easy to process is sufficient. Further, as described above, since the balance weight 1A of the present embodiment is made entirely of resin, the clip 11A is easy to attach and detach, so that it does not damage the rim at the time of attachment or removal, and does not undergo plastic deformation. It is suitable for repeated use, leading to cost reduction for the user, and excellent from the viewpoint of effective use of resources.

  FIG. 3 shows an application example of the balance weight 1A shown in FIG. 1, and shows a balance weight 1B in which the balance weight 1A is enlarged and the weight thereof is increased. Two clips 114 are arranged, and each has a reinforcing rib 103. By using the balance weight 1B thus increased in size, it is possible to correct a larger deviation in the wheel weight distribution even if only one is mounted.

  4 (A) and 4 (B) show another application example of the balance weight 1A shown in FIG. 1, and the balance weight 1C in which the reinforcing rib 102 is provided to the tip side from the top of the step formed by the curved portion of the clip 11C. Is shown. The balance weight 1C is further reinforced with the clip 11C as compared with the balance weight 1A, and the hitting point is completely covered with the reinforcing ribs 102 when the hammer is driven, and the portion is thicker. It has become even more durable.

  As described above, the balance weight for a wheel has been made suitable for reuse by the present invention while making the wheel less likely to be scratched even at a low cost.

  1A, 1B, 1C Balance weight, 10A, 10B, 10C Balance body, 10a Weight, 10b Resin layer, 11A, 11B, 11C Clip, 11a Open end, 11b Return part, 20 Wheel, 20a Rim, 21 Tire, 101, 102 , 103 Reinforcing ribs, 111, 112, 113

Claims (1)

A weight main body arranged with a part in contact with the inner peripheral side of the rim, and a clip extending from the weight main body in a U-shaped cross section and sandwiching the rim to fix the weight main body to the wheel In the balance weight of automobile wheels
The weight body is formed of a resin material on the outer surface side and has a metal weight inside. The clip is made of the resin material, and the weight body and the clip are integrated with the resin material. In addition, the clip has a stepped portion between the weight body outer surface and the weight side outer surface rising from the rim side edge of the weight body outer surface facing the front in the mounted state. formed with and provided with reinforcing ribs for reinforcing the clip comprising reach the tip side of the top portion of at least the step extends in the direction perpendicular to the circumferential direction of projecting the rim from the weight body outer surface and has the hammer curved outer peripheral surface of the clip in the presence of the reinforcing ribs during mounting due to implantation of the hammer is as not directly exposed, this Balance weight and said.

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