JPH03109102A - Installation device for wheel cover - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of an installation device through the injection molding of plastic by installing a pole body laid between a rim and a wheel disc onto a wheel cover board and laying a pillar body between the pole body and the wheel cover board through a cushion part. CONSTITUTION:A wheel cover 0 is composed of a wheel cover board body 1 and a plurality of installation bodies. In this case, each installation body is formed by integrally planting a pole body 2 onto the wheel cover board body 1 through a pillar body 3 including a part 4 which possesses a cushion function. Further, the pole body 2 is arranged between a rim 8 and a wheel disc 9 and laid in contact with each hump 81 and bottom part 91. Accordingly, each installation body is arranged on the periphery of the wheel cover board 1 along the inside diameter of the rim 8. Further, the wheel disc 9 is fitted onto the inner surface of the wall 80 of the rim 8. After the wheel board 1 and the pillar body 3 are integrally molded through the injection molding of plastic, both the 1 and 3 are joined, and manufacture is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wheel cover mounting device, and more particularly to a structure that is integrally molded from a plastic material and does not require any other reinforcing or tensioning parts.

[Prior art] Conventional plastic wheel cover mounting devices include those that fit onto the hump part of the rim or the wheel nut, but it is essential to back it with a metal spring or the like to complement the creeping properties of plastic. Met. For example, Japanese Patent Application Laid-Open No. 160902/1983, Japanese Patent Application No. 62-160, submitted by the applicant
There are various publications such as No. 2-122855.

[Problems to be Solved by the Invention] However, although these conventional examples are simple complementary parts using wire springs, they require parts and management costs, and the plastic material is not related to them. This requires a stopping structure and requires a lot of man-hours for assembly, which is extremely unsatisfactory from an industrial standpoint.

[Means for Solving the Problems] The present invention was developed from the above viewpoint, and its first object is to complete a wheel cover including its attachment device by integral molding of plastic.

A wheel cover made entirely of plastic has only been proposed and manufactured once in the past. However, it was not possible to escape from the influence of creep. A second object of the invention is to provide a mounting device that is not affected by creep.

Furthermore, since creep property is a characteristic of plastics, some form of backing is necessary despite the above. In this invention, a wheel disk is used as a backing member.

A typical example of conventional wheel disks is tl.
sP, No. 3,575,468 and USP, No. 4,361,359, both of which involve interposing a metal spring between the disk and the hump, and their installation performance is unsatisfactory. It is also weak against shock. . A third object of the present invention is to provide a mounting device that is resistant to all vibrations and shocks applied to the disc hole when the vehicle is in motion.

A further objective is to provide a wheel cover mounting device that combines the above to provide a means for achieving a good balance between production efficiency, economy, and functional performance.

[Structure of the Invention] Fig. 1 is a sectional view of a main part showing the basic structure of the present invention. A rod body 2 is erected on the wheel cover body 1 via a column body 3 including a cushion portion 4. Rod body 2 is rim 8
and the wheel disc 9, and is in contact with and spans the hump 81 of the rim 8 and the valley 91 of the wheel disc 9. Accordingly, the attachment bodies are arranged along the inner diameter of the rim 8 and on the circumference of the wheel cover board 1.

The wheel disc 9 is tightly fitted into the inner surface of the well 80 of the rim 8 and is usually integrated by welding. At this time, depending on the width of the rim 8 and the off/set amount of the wheel disc 9, the shape of the valley 91 portion varies in depth and shallowness. On the other hand, the ratio of the displacement centered on the hump 81 portion of the rod body 2 and the extraction force can be varied depending on the part from which the column body 3 is led out from the rod body 2. FIGS. 2 to 4 are explanatory diagrams thereof.

In FIG. 2, if the column 3 is derived from the point where the total length R of the rod 2 is divided into R1 and R2, the extraction force P, which mainly depends on the mass of the wheel cover board 1, is
A torque T1 centered on the rotation center 01 on the 1 side and a torque T2 centered on the rotation center 02 on the valley 91 side are derived.

Since the rim 8 and the disc 9 can be considered to be rigid bodies compared to the rod body 2 and the column body 3, the movement of the locus (hatching instruction part) of the rod body 2 around the rotation center 01 is prevented, and therefore the torque T1 is used as a retaining force. act. On the other hand, since the transfer around the rotation center 02 is not effectively prevented by the hump 81, the torque T
2 is the sampling force. The load P when the vehicle is running is due to acceleration due to vibration and impact, and the above torques TI and T
2 are derived at the same time, so the slip-out prevention function works effectively. At this time, the column lead-out portion of the rod 2 is selected as shown in FIGS. 3 and 4 in accordance with the depth and shallowness of the valley 91. Figure 3 is valley 91
If this is deep, the trajectory of the rod 2 will also be too deep, so the ratio (Rt/R) is set small. On the contrary, in FIG. 4, the ratio (R1/R) is set large. Generally, the rim width and offset amount are determined in advance based on the vehicle specifications, so there is no problem with the above setting procedure.

To describe its operation, when installing the wheel cover, the rod body 2 first contacts the flange base R82 of the rim 8, bows its head, enters along the inner surface of the rim 8, and connects the hump 81 of the rim 8 and the rim well 80. The disc 9 is inserted into the valley 91 of the disc 9 adjacent to the trough 91 of the disc 9. At this time, if the pillar body 3 includes a cushion part 4, the cushion part flexes greatly, which helps the rod body 2 to be fixed in the correct position, and after it is attached, the wheel that hits the rod body 2 This causes a time delay in transmitting vibrations and shocks to the wheel cover board 1, and also causes a delay in transmitting vibrations and shocks from the wheel cover 6t to the rod body 2. In addition, the cushion part is made of plastic material,
Because it has viscoelasticity, it also has the effect of mitigating vibrations and shocks, and has strong drop-off resistance against vibrations and shocks. On the other hand, it can be pulled out by applying a static or quasi-static pulling force, such as by manually pulling it out.

[First Embodiment] FIGS. 5 and 6 show cross-sectional views of essential parts of a first embodiment of the present invention. 21, which is an example of the rod body 2, is the wheel cover board 1.
It is connected via a thin cushion 41 to an example 31 of the column 3 which is erected thereon. When the wheel cover is attached, the rod body 21 is held between the rim 8 and the disc 90 by being spanned between the bumps 81 and the valleys 91, respectively. Along with this, the thin cushion 41 and the pillar body 31 are largely bent and undergo conformal deformation.

The rod body 21 to the column body 31 constituting this attachment body are formed and die-cut as shown in FIG. A slide mold 72 is added to the front mold 71 and the back mold 73, and the rod body 21 is molded horizontally and the column body 31 is tilted toward the slide mold 72 by the draft angle. To cut out the mold, open the front mold 71, let the slide mold 72 escape, and finally remove the back mold 73. At this time, the mold part 731 corresponding to the inside of the thin wall 41 of the rod body 21 is forced out, so that the rod body 21 bows its head and the thin wall part 41 is bent to complete the mold cutting. Therefore, the structure of the thin portion 41 is oriented and its bending strength is increased, so that it is provided with physical properties suitable for use as a cushion and a hinge.

The operation of this example is similar to that of the previously described means.

(Effects of the Embodiment) In this embodiment, the wheel cover including the mounting device is completed by integral molding of plastic, and no other parts or assembly are required. Therefore, it has extremely high productivity.

Conventional hump-mounted wheel covers have the disadvantage that they are difficult to install and remove unless they have rigidity, but this one does not require rigidity, so thin walls or porous materials can be used, making it possible to reduce weight. . In addition, for the same reason, it has a large air hole area, good brake heat dissipation, and a wide degree of freedom in design. In this respect, the small footprint of the mounting device also contributes synergistically. Furthermore, since the rigidity is low, soft elastic materials can also be included in the scope of application, so that it is possible to achieve high impact strength while achieving a thin wall and light weight.

[Second Embodiment] FIGS. 7 and 8 are a perspective view and a sectional view of a main part of a second embodiment of the present invention. In this example, a swing width limiter is attached to the column in the previous example to serve as reinforcement, and is particularly suitable for limiting the eccentric movement of the wheel cover when the integrally molded material is a relatively soft elastic material. do.

The rod 21 and thin cushion 41 in this example are the same as those in the previous example. However, if the material to be applied has flexibility or elasticity, it tends to have excessive cushioning properties and the deflection of the column 32 in the falling direction tends to be excessive. Part bodies 51 and 51 forming the limiting body 5 are made to stand together in a U-shape.

The pillar body 32 and the parts 51, 51 are integrated as shown in FIG. 7 and are erected on the wheel cover board 1, so that they can have great rigidity. It is clear that this structure can be molded and die-cut in the same manner as in the previous example.

In this embodiment, the rod 21 and the thin cushion 41
Since is the same as the previous example, the mounting action in this example is also the same. The column 32 has parts 5 on both sides! Since it is integrated, it is difficult to fall down and bend, and furthermore, its outer edge 511 is connected to the seat back 8 of the rim 8.
3, and during vibration, the eccentric movement of the wheel cover 0 is limited to this distance. Accordingly, it is also possible to limit the shearing or bending stress that occurs mainly in the thin cushion 41 portion.

(Effects of Example) In addition to the effects of the previous example, the effect of this example is that the selection range of materials can be expanded in the direction of having soft or elastic properties. Plastic wheel covers have problems with brittleness or impact strength in low-temperature environments, but general-purpose modification methods that address these issues usually make them more flexible in high-temperature environments. This example has the effect of obtaining a mounting device that can be applied even if the above-mentioned general-purpose modification is performed. To give a specific example, a polypropylene wheel cover is modified with polyethylene in order to accomplish the above purpose. I get good results when I do this.

Furthermore, by limiting the eccentric movement of the wheel cover and limiting the stress of the thin cushion 41, it also has the effect of improving its durability.

[Third Embodiment] FIGS. 9 and 10 show a perspective view and a sectional view of essential parts of a third embodiment. This example presents another example of attachment means that span the hump 81 of the rim 8 and the valley 91 of the disc 9.

The rod 22 in this example is connected to a column 33 via a hinge 42, which is a cushion 4.

On both sides of the column 33, side plates 52.degree. 52, which are restricting bodies 5, are integrally installed and erected from the wheel cover board 1, and the column 33 and the side plates 52 have an H-shape in planar cross-section.

The molding/cutting method for this structure can also be realized in exactly the same way as the previous example.

In this example, first, the dorsal peak 522 of the side plate 52 comes into contact with the valley 91 of the disk 9, thus defining the top position of the column 33. This relationship must also occur on the opposite side of the axle (not shown), so the dorsal apex 522 must be connected to the disk 9.
As well as being set to hug the wheel cover board 1
This also requires some flexing. However, the wheel cover board 1 is large compared to this fitting dimensional accuracy, and as is clear from the figure, it is bent and flexed, so it usually automatically satisfies the above requirements.

The rod 22 is then connected from the hump 81 of the rim 8 via the hinge 42 to the top of the defined column 33 described above. Therefore, the configuration of the connecting member from the hump 81 to the valley 91 is three-dimensionally intricate with the rod body 22, hinge 42, column body 33, and side plate 52, and includes many elastic bending parts, especially the hinge 42 is flexible. respond to For this reason, a much more flexible fitting action can be obtained than when using a single rod body 2, the requirements for dimensional accuracy are relaxed, stress is small, elasticity functions effectively, and creep resistance is maintained for a long period of time. Ru.

The gap between the outer u1521 of the side plate 52 and the seat back 83 of the rim 8 has the same function as described in the previous example, but in addition, the difference in thermal expansion coefficient between the metal of the disc wheel and the plastic of the wheel cover creates a gap in this example. In the configuration, hinge 4 at high temperature
Since there is a possibility that a huge stress may be generated in 2, it also has a function to limit this. Specifically, as shown in FIG. 10, the wheel cover disk 1, which has expanded to a larger diameter due to the abutment in the gap, is bent in a downward convex direction to reduce stress.

(Effects of Example) In addition to the effects described in the precedent, this example has strong installation performance due to the above-mentioned flexible installation, is resistant to vibration and shock, and is resistant to changes over time including temperature changes. It also has the effect of maintaining long-term installation performance.

[Fourth Embodiment] FIG. 11 is a perspective view of the main part of the fourth embodiment, illustrating a method for actively utilizing the air hole of the wheel cover board when the mounting body overlaps with the air hole.

There is an air hole 10 on the wheel cover board 1, and this and the rod body 2
However, due to limitations on the number of divisions, they may have no choice but to occupy the same position. This example shows a method in which the column 3 34 is arc-shaped and has a wide width to straddle the air hole 10 .
is optional.

The rod body 22 is the same as the previous example, and the rod body 34 is connected via a hinge 42.
It is connected from the top of the. The molding and molding of this structure differs from the previous example in that the lower surface of the rod body 22 is manufactured using the front mold that is inserted through the air hole 10, so a slide mold is not necessary and only the front mold and the back mold are used. Can be produced in male and female split molds. Accordingly, since the rod body 22 can be molded into the illustrated shape, that is, the shape in use, the hinge 42 does not need to be thinned for the purpose of die cutting, and the air hole 10 generally has a standing edge around it. Although it is preferable to use a means to emphasize the three-dimensional effect by providing a straddle hole 34
If 1 is attached, it can be handled using the same type side strategy.

The dorsal edge 342 of the column 34 is brought into contact with the valley 91 in the same way as the dorsal apex 522 in FIG.
It is not necessary to touch the gold edge of 4 to the disk 9 surface, and the column 34
It is preferable to set the arc to be tight (with R small) so that only both ends of the back edge 342 come into contact with each other, since the warping elasticity of the column 34 itself can also be utilized.

Similar to the connection between the hump 81 and the valley 91 in the previous example, in this example, the connection is performed across the shaft 22, the hinge 42, and the column 34. As described above, since there is no limit to the wall thickness of the hinge 42 in terms of molding, the elasticity or flexibility of this portion can be set freely. Moreover, since the column body 34 is wide and its curvature can be set freely, it is possible to provide appropriate elasticity while keeping the stress small in this part.

With these, while compensating for the creep properties of plastic,
It is a strong and long-lasting attachment.

(Effects of Example) In addition to having the same effects as the previous example, this example is characterized by easy productivity that does not particularly require a slide mold. This invention has the greatest effect in providing a wheel cover that can be completed only by integral molding of plastic (with the exception of painting), but in this example, it is noteworthy that it can be molded only on the male and female sides. effective. This allows it to be used in both mass production and small quantity production, and is also inexpensive.

[Fifth Embodiment] FIGS. 12 and 13 are a perspective view and a cross-sectional view of essential parts of a fifth embodiment of the present invention. In this example, a pillar body 35 which is largely bent in a "dog" shape is used as the cushion means 4, and this pillar body 35 is also used as the restricting body 5, and the difficulty in mounting operation that occurs due to the large bending. The projecting body 30
We will present measures to avoid this by installing the same. Note that the projecting body 30 is an effective measure for improving operability even when applied to other embodiments.

The rod body 2 of this example has a large wall thickness to prevent buckling and deflection, and is provided with thinning holes 230 and 230 to prevent sink marks during molding. The columns 35 and 35 derived from this and connected to the wheel cover board 1 each have curves 351 and 352 that function as the cushion 4, and are bent in a large "<" shape. This bending occurs when the wheel cover is installed inside the rim (see Figure 13).
A gap is provided between the protrusion 353 functioning as the limiter 5 and the flange base R82 of the rim 8. A protrusion 30 is placed upright from the wheel cover board 1 in the middle of the pillars 35 and 35, and the dimensions are set so that there is a gap g between the top of the protrusion and the rod 23 in the attached state. ing.

The process of molding and punching out the structure described above is performed using a slide die, taking advantage of the large bending of the column 35. As shown in Figure 12, the shape of the columnar body 35 when molded is such that the rod body 23 protrudes further outward from the wheel cover than the protruding body 30, so that the inside of the protruding body 30 can be molded with the back die without undercuts. Below the 0 rod body 23, below the curves 351 and 352, and the projecting body 3
The outer surface of 0 is molded and punched using a slide die.

The wheel cover integrally molded in this way is completed after finishing processes such as painting, and when installed, the wheel cover
Since the upper surface is slid into the flange base R82, the rod body 23 hangs its head and the upper half beam of the column body 35 also moves to the first position.
3. It is bent and fitted as shown in the figure. Immediately after being fitted, the column 35 is particularly deflected and therefore generates a large internal stress, but due to the stress relaxation (or creep) characteristic unique to plastic materials, it gets used to it over time. In other words, secondary molding is automatically performed by the mounting operation.

The mounting action in this example is generally the same as that described above, but the characteristic feature is the cushioning function due to the large bending of the column 35. This cushion function is the first
3. After the installation as shown in the diagram is completed, vibrations and
It absorbs shock well and exhibits strong mounting performance, but on the other hand, during the installation operation, the rod body 23 bows its head and various parts of the pillar body 35 bend greatly, so the rod body 23 becomes humped. Symptoms that are difficult to accommodate for 81 people also occur. The connection between the hump 81 of the rim 8 of the rod body 2 and the valley 91 of the disc 9 is a "stop fit" as used in the JIS terminology, not only in this example but also in other examples, and is not an "interference fit". However, the above symptoms can also occur in other cases, although there are differences in severity. It is easy to deal with this symptom, and there is a so-called ``trick for installation'', and it is preferable to tap it lightly just before the installation is finished, but it is difficult to make it widely known as it is a matter that is left to the user. Therefore, in this example, a gap g is placed at the top of the projecting body 30 to face the jaw of the rod body 23, and when the wheel cover board 1 is pushed and bent during the installation operation, the rod body 23
The value of ¥ag between 0 and 0, which is designed to push up the chin and fit it into the hump, is a function of how easy the wheel cover board 1 is to bend.
Good results are usually obtained with 2 to 5 ml11.

The protrusion 353 of the column 35 is set to create a gap between it and the flange base R82 of the rim 8, and the eccentricity of the wheel cover board with respect to the disc wheel is limited to this gap. That is, the overhang 353 has the function of the limiter 5.

Generally, if the steady rest is restricted at the flange base R82, oblique contact will occur, which will also cause an impact component force in the downward direction shown in Figure 13, that is, in the direction of removing the wheel cover, which will cause problems, but in this example, Since it is connected to the wheel cover plate through the bends 351 and 352, the impact components are well absorbed, while the eccentric movement is effectively limited.

The greatly bent structure of the column 35 further allows the wheel cover to be set in close contact with the rim flange end. With a wheel cover that uses a conventional hump fitting type mounting device, this close contact setting cannot be used because the impact force that hits the wheel cover at the rim flange end is directly transmitted to the mounting member, causing it to fall off. A gap was required between the flange and the flange end, which was not only unsightly but also allowed dirt, mud, and water to enter.

(Effects of the example) This example inherits all the effects of the other examples, and also simplifies the installation operation, has strong installation performance against vibration and shock, allows the wheel cover to be set in close contact with the rim, and allows for eccentric Even though the movement restriction function is effective, the effect of being able to complete the wheel cover with only one piece of plastic molding is still maintained.

Therefore, it is possible to provide an inexpensive, high-performance, and cost-effective wheel cover mounting portion/place.

[Effects of the Invention] The present invention provides a rod body as described above, which is provided on a wheel cover board and is fitted across the hump part of the rim and the rim well bottom joint valley part of the wheel disc. and a plastic wheel cover comprising a column extending from the rimwell bottom joint valley side of the rod and integrally connected to the wheel cover board via a portion having a cushioning function. It is a mounting device.

Therefore, the wheel cover mounting device can be completed immediately by only the plastic injection molding process, allowing for rational production and good economic efficiency. In addition, along with this, mass production and
It has excellent effects such as being able to handle both small-volume and high-mix production and being highly marketable.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main part showing the basic means of this invention, and FIG.
4 to 4 are explanatory diagrams of the operation, FIGS. 5 and 6 are explanatory diagrams of the first embodiment of the present invention, FIGS. 7 and 8 are diagrams of the second embodiment of the present invention, and FIG. 9 is an explanatory diagram of the second embodiment of the present invention. 10 is an explanatory diagram of the third embodiment of the present invention, FIG. 11 is an explanatory diagram of the fourth embodiment of the present invention, and FIG. 12 is an explanatory diagram of the fourth embodiment of the present invention.
The figure and FIG. 13 show explanatory diagrams of a fifth embodiment of the present invention. 1... Wheel cover board 2... Rod body 3... Column body 4... Cushion 5... Limiting body 6... Projection 7... Molding mold
8...Rim 9...Wheel disc 0...Superior concepts representing the entire wheel cover and 4 other people Figure 11 Figure 7 Figure 11 Figure 13

Claims (1)

[Claims] 1. A rod provided on the wheel cover board and fitted across the rim hump and the rim well bottom joint valley of the wheel disc, and a rod extending from the rim well bottom joint valley side of the rod; A mounting device for a plastic wheel cover, characterized in that the device comprises a column that is integrally connected to the wheel cover board through a portion having a cushioning function.