Cover plate for spare wheel housing

A cover plate for covering an upper opening of a spare wheel housing for accommodating a spare wheel of a vehicle. The cover plate is so formed as to completely cover the upper opening of the spare wheel housing and is provided at a center of a lower surface of the cover plate with anchoring means adapted to resiliently engage a hub hole of a wheel disc of a spare wheel, thereby preventing the cover plate from being shifted by vibrations or other forces of the vehicle.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to a cover plate for covering an upper opening of a 
spare wheel housing for accommodating a spare wheel of a vehicle. 
2. Description of the Prior Art 
A conventional cover plate for a spare wheel housing is shown for example 
in FIG. 1, in which a floor panel 2 is depressed correspondingly to a 
shape of a spare wheel 1 to form a spare wheel housing 3. Within the spare 
wheel housing 3 is horizontally arranged the spare wheel 1, on the upper 
side of which is located the cover plate 4. A floor panel 2 which is a 
bottom of a trunk 5 of a vehicle is inherently preferably flat without any 
protrusion or depression and therefore the spare wheel housing 3 formed in 
the floor panel is preferably closed over its entire upper opening. 
Such a conventional cover plate 4 is a mere thin disc plate. When the cover 
plate 4 is made larger than the aforementioned upper opening of the spare 
wheel housing 3, the cover plate 4 is only positioned on the floor panel 2 
without any means for anchoring the plate in place. Accordingly, the cover 
plate is often likely to be shifted by vibrations or other forces of the 
vehicle. To avoid this, a conventional cover plate 4 is often made smaller 
than an outer diameter of the spare wheel 1 so that an outer circumference 
of the cover plate abuts against a circular raised surface of a sidewall 
of the tire to determine the position of the cover plate 4. 
With such a conventional cover plate for a spare wheel, however, the cover 
plate 4 is smaller than the outer diameter of the spare wheel 1 to be 
supported on the upper side of the spare wheel, so that the outer 
circumference of the cover plate is apt to injure the spare wheel, while 
the cover plate 4 covers only a wheel disc 6 but does not cover a circular 
space between the outer circumference of the spare wheel 1 and the upper 
edge of the spare wheel housing 3, with the result that the cover plate 
does not sufficiently keep flat the bottom of the trunk 5. Moreover, as 
the cover plate does not have means for anchoring itself, the plate is 
likely to be shifted by vibrations or other forces of the vehicle and 
therefore it is difficult to maintain the cover plate in place. 
SUMMARY OF THE INVENTION 
It is an object of the invention to provide an improved cover plate for a 
spare wheel housing, which eliminates the above disadvantages of the prior 
art. 
It is a primary object of the invention to provide a cover plate for a 
spare wheel housing, which is so formed as to cover an upper opening of a 
spare wheel housing and is provided at a center of a lower surface of the 
cover plate with anchoring means adapted to resiliently engage a hub hole 
of a wheel disc of a spare wheel. 
The invention will be more fully understood by referring to the following 
detailed specification and claims taken in connection with the appended 
drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
FIGS. 2-4 illustrate one embodiment of the invention. Referring first to 
FIG. 2, a cover plate 4 is made of a thin plate material in the form of a 
disc. The cover plate 4 is formed at its center with a center hole 8 for 
holding an anchoring means 7 mentioned later and is further formed at a 
location radially spaced a suitable distance from the center hole 8 with a 
hole 9 for engaging fingers of a hand for lifting the cover plate 4. The 
center hole 8 and the hole 9 are communicated with each other by an 
elongated slot 10. 
Referring to FIG. 3, a reference numeral 11 shows a clip which constitutes 
the above mentioned anchoring means 7 for the cover plate 4 when it is 
secured to the cover plate 4. The clip 11 consists of a head 11a, a shaft 
11b and fingers 11c. The disc-like head 11a is provided at the center on 
its lower side with the shaft 11b downwardly extending therefrom. At the 
lower end of the shaft 11b on the opposite side of the head 11a are 
provided the three fingers 11c formed integrally with the shaft 11b and 
having upper ends facing to the head 11a. The clip 11 is made of a 
resilient material such as a plastic material or snythetic resin as a 
whole to give an elasticity to the fingers 11c. The shaft 11b is thinner 
than the center hole 8 of the cover plate 4. The outer surfaces of the 
three fingers form an imaginary circle whose outer diameter is reasonably 
larger than a diameter of a hub hole 12 of a wheel disc 6 of the spare 
wheel 1. 
The clip 11 formed as above described is secured to the cover plate 4 to 
form anchoring means 7 consisting of the clip 11 on the cover plate 4. In 
this case, the shaft 11b and the fingers 11c of the clip 11 are inserted 
through the hole 9 of the cover plate 4, and while keeping the relation 
between the cover plate 4 and clip 11, the shaft 11c is then moved in 
parallel with the surface of the cover plate through the elongated slot 10 
into the center hole 8, so that the anchoring means 7 is formed at the 
center of the lower surface of the cover plate 4. 
The operation of the cover plate 4 with the anchoring means 7 will be 
explained hereinafter. When it is required to arrange the cover plate 4 on 
the spare wheel housing 3, the anchoring means 7 of the cover plate 4 is 
fitted into the hub hole 12 of the wheel disc 6 of the spare wheel 1 
accommodated in the spare wheel housing 3. Although the diameter of the 
imaginary circle formed by the outer surfaces of the three fingers 11c is 
larger than the inner diameter of the hub hole 12 of the wheel disc of the 
spare wheel, the outer surfaces of the fingers 11c abut against the inner 
periphery of the hub hole 12 and the fingers 11c are guided by the inner 
periphery and slid into the hub hole 12 while being elastically deformed. 
As the result, the fingers 11c are fitted within the hub hole 12 smaller 
than the imaginary circle formed by the outer surfaces of the fingers. In 
addition, the fingers 11c tend to urge the hub hole 12 of the wheel disc 
outwardly, so that the cover plate 4 is resiliently fixed to the spare 
wheel 1 without removal of the anchoring means 7 from the hub hole 12 of 
the wheel disc. The upper opening of the spare wheel housing 3 is 
completely covered by the cover plate 4. Moreover, as the cover plate 4 
and the spare wheel 1 are elastically connected to each other, the 
position of the cover plate 4 secured to the spare wheel 1 is not shifted 
unintentionally. 
When it is required to remove the cover plate 4 from the spare wheel 1, 
fingers of one hand of a driver engage the edge of the hole 9 of the cover 
plate 4 to lift it against the engaging force between the anchoring means 
7 and hub hole 12 of the wheel disc so as to disengage therebetween. In 
this case, when the cover plate is lifted upwardly, the outer surfaces of 
the fingers 11c abut against the inner periphery of the hub hole 12 of the 
wheel disc and are guided thereby while being elastically deformed, so 
that distances between the fingers 11c are reduced and therefore the 
imaginary circle formed by the outer surfaces of the fingers becomes 
smaller than the diameter of the hub hole 12, permitting the anchoring 
means 7 to remove from the hub hole 12. 
FIG. 6 illustrates another embodiment of the invention, wherein anchoring 
means 7 in the form of a column is provided at the center on the lower 
surface of the cover plate 4. An outer diameter of a cross-section of the 
column-like anchoring means 7 is made substantially equal to that of the 
hub hole 12. According to this embodiment, when the column-like anchoring 
means 7 is fitted in the hub hole 12 of the wheel disc of the spare wheel, 
the cover plate 4 is held in place against a horizontal movement and 
simultaneously vertically positioned with the aid of weight of gravity of 
the cover plate 4 and anchoring means 7. 
The anchoring means 7 may be made of an elastic material as well as a rigid 
material. Moreover, the anchoring means 7 may be formed integrally with 
the cover plate 4 by injection molding or it may be integrally fixed to 
the cover plate 4 by welding or other means. In these cases, the head 11a 
is not essential for the anchoring means 7. Furthermore, various shapes 
and constructions of the anchoring means 7 may be employed other than 
those of the above two embodiments, so long as the anchoring means extends 
downwardly from the center of the lower surface of the cover plate. 
As can be seen from the above explanation, a cover plate according to the 
invention is so formed as to cover an upper opening of a spare wheel 
housing and is provided at a center of a lower surface of the plate with 
anchoring means adapted to resiliently engage a hub hole of a wheel disc 
of a spare wheel. With such an arrangement, the overall upper opening of 
the spare wheel housing is covered by the cover plate, so that the cover 
plate does no longer injure sidewalls of the spare wheel and completely 
close a depression of the spare wheel housing to keep flat a floor of a 
trunk of a vehicle or the like. The cover plate is firmly kept in place, 
so that it is not shifted by vibrations or other forces of the vehicle. As 
the anchoring means is adapted to engage a hub hole of a wheel disc of a 
spare wheel, the cover plate and anchoring means can be applied to tires 
of various sizes without changing the cover plate and anchoring means. 
While the invention has been particularly shown and described with 
reference to preferred embodiments thereof, it will be understood by those 
skilled in the art that the foregoing and other changes in form and 
details can be made therein without departing from the spirit and scope of 
the invention.