JPH11257437A - Wheel balancing weight and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sticking type balance weight to facilitate cutting and be excellent in productivity and to provide its manufacturing method. SOLUTION: This wheel balancing weight comprises a weight body 20; and a pressure sensitive adhesive double coated tape 30. The weight body 20 is formed of other metal than lead and molded by cold forging. Slits 21 are formed at intervals of a given distance, and a balance weight 10 having a slit part forming a taper surface is manufactured by a manufacturing method comprising a process wherein a bar material is manufactured; a process wherein the slits 21 are formed by a roller for processing the slits or a punch; and a process wherein the weight body 20 and the pressure sensitive adhesive double coated tape 30 are stuck to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sticking type wheel balancing weight.

[0002]

2. Description of the Related Art A vehicle in which a vehicle wheel and a tire are assembled may have a dynamic imbalance when the wheel rotates, and a balancing weight (also referred to as a balance weight) is usually mounted to correct the dynamic imbalance. In recent years, the use of the stick-on balance weight has been increasing for the following reasons. In order to attach importance to the design of the wheel, avoid attaching clip-type balance weights to the design surface, and apply an adhesive balance weight to the circumferential surface behind the wheel. Due to the diversification of the wheel flange shape, it may be difficult to attach the clip-type balance weight to the wheel flange. Since the weight of the balance weight has been reduced due to the improvement in the accuracy of the wheels and tires, it has become possible to apply a stick-on balance weight. The structure of the existing adhesive balance weight is a double-sided adhesive tape (hereinafter referred to as a double-sided tape) attached to a bar-shaped Pb (lead) weight part manufactured by casting.
Is attached. A release paper is attached to a surface to be attached to the wheel to protect an adhesive portion, and an operator peels off the release paper at the time of use. In order to secure the holding force of the balance weight to the wheel, it is desirable that the surface to which the bar is attached to the wheel has the same curvature as the surface to which the wheel is attached. The balance weight can also be deformed into the same shape as the wheel curvature surface by hand force.

[0003]

In recent years, from the viewpoint of environmental protection, the industrial use of heavy metals such as Pb has been refrained, and Pb tends to be replaced by other materials even in balance weights. Has a proven track record of industrial practical use, low material unit prices,
Although alternative materials having relatively high specific gravity are also expected in view of environmental safety, Fe, Cu, and the like can be considered. However, the physical properties of these raw materials include a high melting point. When the sticking balance weight is made of such a material, since the strength is greater than that of Pb, it is difficult to give the same curvature deformation as that of the wheel sticking surface at the time of sticking with the force of an operator's hand. In addition, the type of weight is specified weight (example: 5 g)
To 100 g in 5 g increments), it is necessary to produce weights having a total length corresponding to the weight of all these types. Some conventional Pb-attached balance weights are provided with slits at unit weight intervals. The function of the slit in this case is only to make it easy to cut the weight according to the required weight in the working environment where the slit is attached. In the case of Pb, the material strength is low and can be easily cut, and there is no problem regarding corrosion of the cut surface. On the other hand, when the weight is made of steel, a large force is required for cutting. Also, if the substrate is exposed, there is a fear of corrosion. Therefore, after cutting, surface treatment is required again.
It is an object of the present invention to provide a wheel balancing weight which eliminates environmental problems by replacing lead with another metal, and which is easy to cut, and a method for manufacturing a wheel balancing weight which is excellent in productivity. .

[0004]

The present invention to achieve the above object is as follows. (1) A single weight main body and a single double-sided tape having the weight main body attached to one surface thereof, wherein the weight main body is made of a metal material other than lead, and is attached to a bar of the metal material at a predetermined interval. A wheel balancing weight which has a slit and is attached to a wheel on a surface of the double-sided tape opposite to a side to which the weight body is attached. (2) The wheel balancing weight according to (1), wherein the slit portion of the weight body has a tapered surface. (3) A single weight main body and a single double-sided tape having the weight main body adhered to one surface thereof, wherein the weight main body is made of a metal material other than lead, and is attached to a bar of the metal material at a predetermined interval. Has a slit, a method of manufacturing a wheel balancing weight, a step of manufacturing a bar material by rolling or extrusion, forming a slit at a predetermined interval using a rolling roller for slit processing on the bar material. A method for manufacturing a wheel balancing weight, comprising: a step of manufacturing a weight body; and a step of attaching the weight body to one side of a double-sided tape. (4) A single weight main body and a single double-sided tape having the weight main body attached to one surface thereof, wherein the weight main body is made of a metal material other than lead, and is attached to a bar of the metal material at a predetermined interval. A method of manufacturing a wheel balancing weight having slits therein, wherein a bar material is manufactured by rolling or extruding, and a slit body is formed at predetermined intervals using a punch on the bar material to manufacture a weight body. And a step of attaching the weight body to one side of the double-sided tape.

In the wheel balancing weights (1) and (2), a metal other than lead is used for the material of the weight body, which is desirable from the viewpoint of environmental protection. Also, since the bar has a slit, it can be easily cut. By bending the slit several times in the opposite direction, it can be easily cut even by hand. In the method (3) for producing a wheel balancing weight, a bar material is produced by rolling or extrusion,
Since the slit is formed by the rolling roller for slit processing, the productivity is higher than the production by casting or cutting. In the method (4) for manufacturing a wheel balancing weight, since the bar material is manufactured by rolling or extrusion and slits are formed by punching, the productivity is higher than manufacturing by casting or cutting.

[0006]

1 to 3 show a wheel balancing weight according to one embodiment of the present invention, FIG. 4 shows a wheel to which the wheel balancing weight is attached, and FIGS. First method of manufacturing wheel balancing weights
FIG. 7 shows a second embodiment of the method for manufacturing a wheel balancing weight according to the present invention. FIG. 8 shows reworking by forging, and is applicable to the first and second embodiments of the method of the present invention. Portions common to all embodiments of the present invention are denoted by the same reference numerals throughout all embodiments of the present invention.

A wheel balancing weight (a balancing weight is also called a balance weight) 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 and 4. FIG. The balance weight 10 is composed of a single weight body 20.
And a single double-sided tape 30 having the weight body 20 attached to one surface. The balance weight 10 is attached to the inner peripheral surface of the flange 12 of the wheel 11 on the surface of the double-sided tape 30 opposite to the side on which the weight main body 20 is attached.

The weight body 20 is made of a metal material other than lead (for example, a metal material having a higher melting point than lead, and a material having a relatively large specific gravity, for example, steel, copper, etc. is preferable). In the weight body 20, deep slits 21 are formed at predetermined intervals in a metal bar. The surface of the slit portion 21 of the weight body 20 is desirably a tapered surface (however, it may not be a tapered surface, for example, may be a parallel surface), and if the slit portion is a tapered surface 22, the tapered surface 22 May be a linear taper or a curved taper.

Here, the remaining plate thickness of the slit 21 is set to such a degree that it can be easily deformed by the force of the operator's hand. By repeatedly bending the bar in the opposite direction by hand at the slit 21 site, the bar can be easily cut at the slit 21 site.

The predetermined intervals are as follows.
As shown in FIG. 5, the balance weight 10 is
When attached to the inner peripheral surface of the flange 12 of the
Even if the portion other than the 0 slit 21 is not deformed, the slit portion is bent, so that it can be stuck to the inner peripheral surface of the wheel. The longer the distance between the slits 21 is, the lower the holding force of the double-sided tape 30 is, but the shorter the distance between the slits is, the more disadvantageous in terms of productivity and cost.

When the opposed end surfaces of the adjacent weight bodies forming the slit portion are tapered surfaces 22 (which may be linear or curved), the distance between the opposed tapered surfaces 22 increases as the distance from the double-sided tape 30 increases. spread. When the balance weight 10 is adhered to the inner peripheral surface of the wheel, in the case of a linear tapered surface, the gap between the weight main bodies 20 is eliminated by the contact between the adjacent tapered surfaces (opposing tapered surfaces) 22. The angle of the taper is geometrically determined uniquely for one curvature, but in actuality, since the slit portion and the double-sided tape 30 expand and contract and play a buffering role, an appropriate taper angle is set. By doing so, it is possible to cope with various types of curvature surfaces with one taper angle.

Since the total length of the weight main body 10 conforms to the standard weight of the weight (eg, 5 g to 100 g in increments of 5 g), a weight having a total length which can correspond to the weight of all these kinds (therefore, the longest). Have it ready.

Next, a method of manufacturing the wheel balancing weight (the balancing weight is also referred to as a balance weight) 10 according to the embodiment of the present invention will be described. 5 and 6
1 shows a first embodiment of a method for manufacturing a wheel balancing weight according to the present invention. The method of manufacturing the wheel balancing weight 10 according to the first embodiment of the present invention comprises a single weight body 20 and a single double-sided tape 30 having the weight body 20 adhered to one surface.
Is made of a metal material other than lead, and has a shape in which slits 21 are formed at predetermined intervals in a bar of metal material (the slit portion may be a tapered surface 22, but is not limited to a tapered surface). A method of manufacturing the wheel balancing weight 10 having a step of manufacturing the bar material 23 by rolling or extrusion (first step in FIGS. 5 and 6), and a rolling roller for slitting the bar material 23. 24, slits 21 are formed at predetermined intervals to form weight body 2
0 (a second step in FIGS. 5 and 6), and a step of attaching the weight body 20 to one surface of the double-sided tape 30;
Consists of In the example of FIG. 5, the bar material 23 is fed in the longitudinal direction, and the axis of the rolling roller 24 for slit processing is arranged in the direction perpendicular to the longitudinal direction of the bar 23 to form the slit 21. , The bar material 23 is fed in a direction perpendicular to the longitudinal direction, and the axis of the
3 are arranged in a direction parallel to the longitudinal direction and slits 21 are formed. The slit 21 is formed by the rolling roller 24 for slit processing.
Is formed, so that the productivity is higher than when the tapered surface 22 is formed by cutting or the like. Further, since the bar material 23 is manufactured by rolling or extrusion, the productivity is better than in the case where each weight body is manufactured by casting. However, the weight main body 20 of the wheel balancing weight 20 of the present invention may be other than that manufactured by the manufacturing method of the first embodiment, and may be the weight main body 20 manufactured by casting.

FIG. 7 shows a second embodiment of the method for manufacturing a wheel balancing weight according to the present invention. The manufacturing method of the wheel balancing weight 10 according to the second embodiment of the present invention includes a single weight body 20 and a single double-sided tape 30 having the weight body 20 adhered to one surface. (A slit portion may be a tapered surface 22, but is not limited to a tapered surface). 7, a method of manufacturing the wheel balancing weight 10, including a step of manufacturing the bar material 25 by rolling or extrusion (FIG. 7).
A first step), a step of forming the slits 21 at predetermined intervals using a punch 26 in the bar material 25 to manufacture the weight main body 20 (second step in FIG. 7), Affixing it to the device. In the second step of FIG. 7, the punch 26 may form the slit 21 with a single-stage punch 26, or may form the slit 21 with two-stage (or any number of stages) punches 26A and 26B. Good. By having multiple stages,
The punch is less damaged and molding is easy. Punch 2
Since the slits 21 are formed at 6, 26A and 26B, the productivity is better than when the tapered surface 22 is formed by cutting or the like. Further, since the bar material 23 is manufactured by rolling or extrusion, the productivity is better than in the case where each weight body is manufactured by casting. However, the weight main body 20 of the wheel balancing weight 20 of the present invention may be other than that manufactured by the manufacturing method of the second embodiment, and may be the weight main body 20 manufactured by casting.

In the manufacturing method of the first and second embodiments of the present invention, after a bar material manufacturing process and a slitting process, forging (which may be cold, warm, or hot) is performed. A step of reworking (precision processing) into the shape may be added. In the forging process, deburring of burrs and sagging of edges generated in the cutting process can be achieved at the same time. FIG. 6 shows the reworking and deburring in the forging process. The thickness of each part of the weight body 20 before forging, horizontal and vertical dimensions of the plane,
Assuming that t + Δt, L−ΔL, W−ΔW, the respective dimensions are set to t, L, W by forging compression, and the corners are rounded at that time. Because of forging, productivity is higher than casting and cutting.

[0016]

According to the wheel balancing weight of the first aspect, the following effects are obtained. (1) Advantages of using a material other than Pb-Eliminates environmental problems. (2) Advantages of slits provided at predetermined intervals ・ Can be used by cutting only the required weight. -The operator can cut by bending at the slit part by hand.・ Because it can be bent at the slit, the balance weight can be affixed to the inner circumference of the wheel. According to the wheel balancing weight of the second aspect, since the slit portion has the tapered surface, the following effects are obtained.・ Since the operator can easily bend the slit portion even by hand, the balance weight can be stuck to the inner peripheral portion of the wheel. -When affixed to the inner peripheral surface of the wheel, there is no gap at the slit part, and the accumulation of dust and dirt is reduced. -Even at one angle, it can be stuck to various types of curvature surfaces without impairing the holding force. According to the method of manufacturing the wheel balancing weight of the third aspect, the following effects are obtained. -Since bar material is manufactured by rolling or extrusion and slits are formed by rolling rollers, productivity is high. According to the method for manufacturing a wheel balancing weight of the fourth aspect, the following effects are obtained.・ Productivity is high because bar material is manufactured by rolling or extrusion and slits are formed by punches.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wheel balancing weight according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a portion A in FIG.

FIG. 3 is a partial front view showing a state where the wheel balancing weight of FIG. 1 is attached to an inner peripheral surface of the wheel.

FIG. 4 is a cross-sectional view of a part of the wheel in a state where the wheel balancing weight of the present invention is mounted on the inner peripheral surface of the wheel.

FIG. 5 is a perspective view of a bar member and a weight main body in each manufacturing process of the first embodiment of the method for manufacturing a wheel balancing weight according to the present invention.

FIG. 6 is a perspective view of a bar member and a weight main body in respective manufacturing steps of another first embodiment of the method for manufacturing a wheel balancing weight according to the present invention.

FIG. 7 is a perspective view of a bar member and a weight main body in each manufacturing process of a second embodiment of the method for manufacturing a wheel balancing weight according to the present invention.

FIG. 8 is a perspective view of a weight main body in a forging process applicable to the first and second embodiments of the method for manufacturing a wheel balancing weight according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wheel balancing weight 11 Wheel 12 Flange part 20 Weight body 21 Slit part 22 Tapered surface 23, 25 Bar material 24 Rolling roller for slit processing 26 Punch 30 Double-sided tape

Claims (4)

[Claims] 1. A weight body comprising a single weight body and a single double-sided tape having the weight body adhered to one surface thereof, wherein the weight body is made of a metal material other than lead, and a predetermined weight is attached to a bar of the metal material. A wheel balancing weight, which has slits at intervals and is attached to a wheel on a surface of the double-sided tape opposite to a side to which the weight body is attached. 2. The wheel balancing weight according to claim 1, wherein said slit portion of said weight body has a tapered surface. 3. A weight body comprising a single weight body and a single double-sided tape having the weight body adhered to one surface, wherein the weight body is made of a metal material other than lead, and a predetermined bar is attached to the metal material bar. A method of manufacturing a wheel balancing weight in which slits are inserted at intervals, a step of manufacturing a bar material by rolling or extrusion, and forming slits at predetermined intervals using a rolling roller for slit processing on the bar material. Manufacturing a weight main body, and affixing the weight main body to one side of the double-sided tape. 4. A weight body comprising a single weight body and a single double-sided tape having the weight body adhered to one surface, wherein the weight body is made of a metal material other than lead, and a predetermined bar is attached to a bar of the metal material. A method of manufacturing a wheel balancing weight, in which slits are inserted at intervals, a step of manufacturing a bar material by rolling or extrusion, and forming a slit at a predetermined interval using a punch on the bar material, a weight body And a step of affixing the weight body to one side of the double-sided tape.