JP3965331B2 - Slope table - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slope pedestal, and more particularly to a slope pedestal for lifting a vehicle wheel to perform maintenance of the vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a slope table used for lifting an automobile wheel to about several centimeters to several tens of centimeters for maintenance under the body of the automobile, tire replacement, chain mounting, and the like. As shown in FIG. 4, the general shape of this type of slope table is that a wheel mounting unit 110 that mounts wheels (tires) and maintains a predetermined height, and the wheel mounting unit 110 has a wheel. It has the structure which consists of the inclination part (slope) 120 for boarding. Metal slope tables such as welded steel and aluminum processed products are commercially available, but they are heavy, difficult to handle, and unsuitable as on-vehicle products for passenger cars. Wooden slope tables are also commercially available and are lighter than metal, but still have the disadvantage of being too heavy for in-car products. On the other hand, a lightweight slope table made of a foamed polymer as shown in FIG. 4 is also known. 4A is a perspective view seen from above, and FIG. 4B is a perspective view seen from below. This slope base 100 is a known product described in US Pat. No. 5,483,715, and is manufactured using a foamed polymer such as foamed high-density polyethylene.
[0003]
In the slope table 100, the surface of the vehicle mounting portion 110 and the inclined portion 120 is covered with resin, and a reinforcing structure in which a large number of ribs 130 are configured in a lattice shape is unfolded. Thus, it is described that it functions as a slope base that can withstand the load when the wheels of the automobile ride on.
[0004]
[Problems to be solved by the invention]
However, in the resin slope table 100 described in US Pat. No. 5,483,715, the uneven pattern portion 121 for preventing slip is formed in a groove or a convex shape on the surface of the inclined portion 120, but this uneven pattern portion for preventing slip. However, there is a problem that it becomes difficult to ride the wheel from the inclined part 120 to the vehicle mounting part 110 due to the use of the 121 for a long time. In addition, even if sand, earth, or the like enters the uneven pattern portion 121 for preventing slipping, gets wet with rain, or adheres to snow, the grip property is lowered, and the same problem occurs.
[0005]
Furthermore, the resin slope base 100 described in US Pat. No. 5,483,715 is lighter than conventional metal or wooden slope bases, but there is room for further weight reduction in order to use it as an in-vehicle product. there were. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a resin slope table that solves the above-described problems, is excellent in gripping properties of an inclined portion, and is reduced in weight.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a slope base made of a synthetic resin comprising a wheel mounting portion for mounting and holding a wheel of a vehicle, and an inclined portion for guiding the wheel to the wheel mounting portion. A plurality of rows of lattice ribs extending in the vertical and horizontal directions with respect to the wheel traveling direction, a hollow cylindrical shaft body positioned at the intersection of the lattice ribs, and the hollow cylindrical shape A plurality of columnar spaces arranged radially with a shaft body as a central axis and partitioned by a plurality of connecting ribs connecting the lattice rib intersections are integrally formed, and at least the wheel passes through the upper surface. The columnar space of the mounting portion and the inclined portion has a through-hole structure with open upper and lower surfaces . As a result, the upper end opening of the columnar space of the inclined part becomes a concavo-convex pattern of the anti-slip part, and even if the anti-slip part wears out, the grip force does not decrease, and sand and soil enter and the grip performance is reduced I will not let you. Moreover, since the resin board which covers the upper surface of an inclination part and a vehicle mounting part can be abbreviate | omitted, the weight reduction can be achieved by that much.
[0007]
The connecting ribs in the grid rib intersection is preferably arranged radially centered axis the hollow cylindrical shaft member that extends in Taidaka direction. This can reduce the weight and increase the strength of the ribs.
[0008]
It is preferable that the rectangular rib-shaped space is partitioned by the lattice ribs, and the triangular prism-shaped space is partitioned by the connecting ribs and the lattice ribs, and has an internal structure including open holes on upper and lower surfaces . According to the shape of such a slope base, the grip force on the surface increases, the structurally strong triangular prismatic space gathers radially, the support strength by the ribs improves, and the ribs withstand the forces from all directions This arrangement provides the advantage of excellent load resistance.
[0009]
In addition, the slope base is preferably a polyamide resin molded body. This polyamide resin has properties of excellent strength, light specific gravity, and low frictional resistance. Therefore, it is possible to provide a slope base that is lightweight and has excellent load resistance. In addition, the connecting ribs are radially arranged in the triangular prismatic space, and at that time, it is also preferable to use a polyimide resin having a smaller frictional resistance from the viewpoint of securing releasability at the time of molding.
[0010]
By adopting a structure in which an arcuate recess that approximates the outer peripheral surface shape of the wheel to be mounted is provided on the upper surface of the wheel mounting unit, the wheel is stably mounted in the arcuate recess of the wheel mounting unit. The safety can be increased.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the slope table of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the slope table of the present invention. 2 is a front view, a plan view, and a bottom view of the slope table shown in FIG.
[0012]
The slope base 1 is manufactured by integral molding as a synthetic resin molded product as a whole. As shown in FIG. 2 (a), the slope base 1 has a substantially rectangular trapezoidal wheel mounting portion 2 that holds a wheel (tire) of an automobile and holds the position thereof, and wheels on the wheel mounting portion 2. It is comprised from the wedge-shaped inclination part (slope) 3 which guides. As shown in FIGS. 2B and 2C, the plane shape of the slope base 1 is substantially rectangular, and in this embodiment, the width is such that a wheel having a general tire width of an automobile can be placed. The width is set to about 200 mm, for example, and the total length is set to about 600 to 700 mm. The bottom is flat so as to be in close contact with the floor or the ground.
[0013]
On the upper surface of the wheel mounting portion 2, an arcuate recess 21 is formed so that the assumed arc string and the slope base bottom surface are substantially parallel. Thereby, the mounted wheel can be stably held in position. The arcuate recess 21 is preferably an arc having a radius of approximately 700 mm that approximates the outer peripheral surface shape of the wheel to be placed, and the height of the lowest part of the recess 21 is preferably approximately 70 mm. Further, a wheel stopper 22 that protrudes slightly upward from the wheel mounting portion 2 is formed at the front end portion on the opposite side of the vehicle mounting portion 2 that continues from the inclined portion 3. Two engagement holes 23 are formed on the upper surface of the wheel stopper 22 at a predetermined distance. In this engagement hole 23, for example, an engagement protrusion provided on a stopper member (not shown) for adding the height of the wheel stopper 22 can be fitted and fixed. The inclined portion 3 is formed so that the vertical thickness gradually decreases from the upper end of the tip of the wheel mounting portion 2 to the tip with a substantially constant inclination.
[0014]
The internal structure of the slope table 1 has a height corresponding to the height of each part, extends in the height direction (vertical direction), and short side ribs and long side ribs are vertically and horizontally in plan view. Lattice ribs arranged on the surface are formed. Three rows of quadrangular columnar spaces are arranged in the longitudinal direction by lattice ribs composed of short side ribs and long side ribs. Further, as shown in FIGS. 2B and 2C, the vertical extension of the two rows of long-side ribs 40 and the short-side ribs 41 in the height direction at every other intersection in plan view. A cylindrical shaft body (hollow center shaft) 4 is formed. From each hollow central shaft 4, eight connecting ribs 42, 42... Are formed to connect each crossing point 7 of the lattice ribs at an opposing position at a 45 ° angle in a plan view. As a result, the internal space of the slope base 1 is viewed in a plan view extending in the longitudinal direction (long side direction) to both sides and the center position in the width direction (short side direction) by the lattice ribs 40 and 41 and the connecting ribs 42. Consists of a continuous space combining three rows of quadrangular columnar spaces 5 arranged in a square and a triangular columnar space 6 in which a combination pattern of eight triangles with the hollow central axis 4 as one vertex is arranged in plan view. Has been. Of each of the square columnar spaces 5 and the triangular columnar spaces 6, the wheel mounting portion 2 and the inclined portion 3 where a vehicle wheel (not shown) travels on the upper surface have a through-hole structure with the upper and lower surfaces open. In order to maintain strength and to ride on the wheels, the top surfaces of the plurality of triangular columnar spaces 6 at the tip and the rectangular columnar spaces 6 at both ends along the longitudinal direction are closed.
[0015]
As the synthetic resin constituting the slope base 1, a resin having a strength capable of securing a load resistance capable of withstanding a load acting when a wheel rides on is suitable. For example, high-density polyethylene, polypropylene, ABS resin, polyurethane resin, polyamide resin such as 6-nylon and 6.6-nylon, and thermoplastic resin such as polycarbonate resin and polyvinyl chloride resin can be used. These resins can be blended with various modified fillers.
[0016]
Among these resins, a polyamide resin is preferable. Since the polyamide resin is excellent in strength and light in specific gravity, the weight can be reduced while increasing the load resistance of the slope base. Further, as a processing advantage, there is a low frictional resistance. When molding a molded product in which a large number of ribs are arranged as in the present embodiment, it may be difficult to release from the mold, but sufficient release properties are ensured by using a polyamide resin. can do. Polyamide resin is relatively expensive, but can be manufactured at low cost by using, for example, a recycled material obtained by dissolving a cut piece of an air bag base fabric into a pellet, and is also preferable from the viewpoint of product recycling. . Since the slope table 1 uses a polyamide resin and can be molded as an integral molded body by, for example, injection molding, the effect is great in terms of process.
[0017]
Next, a usage example of the slope table 1 will be briefly described. As shown in FIG. 3, the slope base 1 has an inclined portion 3 disposed immediately in front of the wheel T (front wheel in the figure) of the automobile, advances the automobile at a slow speed, and moves the wheel T onto the inclined portion 3. The wheel is guided to the wheel mounting part 2 and placed on the arcuate recess 21 of the wheel mounting part 2 and stopped. As described above, the ground clearance of the wheel T can be secured and maintained by a predetermined height, so that maintenance under the vehicle body, replacement of tires, chain mounting, and the like can be easily performed. It can also be used to ride on a step with the sidewalk. In the slope base of this embodiment, the height of the upper end of the wheel stopper 22 having the highest height is 90 mm or less. Therefore, even a car with a low vehicle height can be set and used so as to be inserted under the vehicle body.
[0018]
As a structural feature of the slope base 1, in addition to lattice ribs composed of long side ribs and short side ribs, eight triangular column spaces surrounded by connecting ribs connecting the intersections of the respective lattice ribs in an oblique direction are hollow. Since the basic internal structure is arranged radially about the central axis, strength against loads from all directions is obtained, and the entire structure has good load resistance. Also, by using a polyamide resin as the resin material, good load resistance can be ensured even in terms of the material.
[0019]
Further, from the viewpoint of weight, the slope base 1 can be reduced in weight by using a polyamide resin as a resin material, and most of the quadrangular columnar space 5 and the triangular shape of the vehicle mounting portion 2 and the inclined portion 3. Since the columnar space 6 has a through-hole structure in the vertical direction, the plate material that covers the upper surfaces of the vehicle mounting portion 2 and the inclined portion 3 is omitted. Therefore, the conventional resin slope base shown in FIG. Compared to 100, the weight can be reduced sufficiently. Therefore, even if it is always available as a vehicle-mounted product, there is almost no adverse effect on fuel consumption due to weight increase. And since it is a resin product, unlike a metal slope stand, there is no possibility of damaging other loads.
[0020]
The inclined portion 3 has a structure in which the upper end portions of the square rib spaces 5 and the triangular prism space 6 are exposed at the upper ends of the lattice ribs and the connecting ribs. (This is a combination of triangles). For this reason, the anti-slip portion 31 formed on the inclined portion 3 does not reduce the gripping force even if the rib upper surface is worn down to some extent, and does not deteriorate the gripping property due to the entry of sand or soil.
[0021]
In addition, since most of the square columnar spaces 5 and the triangular columnar spaces 6 have a through-hole structure, water, mud, sand, soil, and the like do not collect inside, and the handling is excellent. Note that the slope table is not limited to the embodiment described above, and it is needless to say that the planar shape, number, etc. of the columnar spaces partitioned by the ribs can be changed as appropriate. The type of columnar space is not limited to a triangular prism or a quadrangular prism, and may be a regular hexagonal prism, that is, a honeycomb (honeycomb) shape. It goes without saying that ribs may be provided around the solid shaft instead of the hollow shaft constituting the cylindrical shaft body. It goes without saying that other dimensions such as the height and slope of the slope table can be appropriately set according to the application, the applicable vehicle type, and the like.
[0022]
【The invention's effect】
As described above, according to the slope base of the present invention, there is an effect that it is possible to provide a lightweight and robust product that is particularly excellent in grip performance at the inclined portion for riding on the wheel placement portion.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing an embodiment of a slope base of the present invention.
2 is a plan view, a bottom view, and a rear view of the slope base shown in FIG. 1. FIG.
FIG. 3 is a perspective view showing a use state of the slope table of the present invention.
FIG. 4 is a perspective view showing an example of a conventional resin slope table.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slope stand 2 Wheel mounting part 21 Arc-shaped hollow 22 Wheel stopper 3 Inclined part 4 Cylindrical shaft body (hollow center axis)
40 lattice rib (long side)
41 Lattice rib (short side)
42 Connecting Rib 5 Triangular Column Space 6 Square Column Space 7 Intersection T Wheel (Tire)

Claims (5)

In a slope table made of a synthetic resin composed of a wheel mounting portion for mounting and holding a wheel of a vehicle, and an inclined portion for guiding the wheel to the wheel mounting portion,
A plurality of rows of lattice ribs in which the inside of the wheel mounting portion and the inclined portion extend vertically and horizontally with respect to the wheel traveling direction, a hollow cylindrical shaft body positioned at the intersection of the lattice ribs, and the hollow tube A plurality of columnar spaces that are radially arranged with a cylindrical shaft as a central axis and partitioned by a plurality of connecting ribs that connect the intersections of the lattice ribs, and at least the wheel passes through the upper surface; A slope base characterized in that the columnar space of the mounting portion and the inclined portion has a through-hole structure with open upper and lower surfaces . The connecting ribs are in the grid rib intersection, the slope table according to claim 1, characterized in that arranged radially centered axis the cylindrical hollow shaft extending in Taidaka direction. The square columnar space partitioned by the lattice ribs and the triangular columnar space partitioned by the connecting ribs and the lattice ribs have an internal structure made up of through holes with upper and lower surfaces open. The listed slope table.   The slope base according to claim 1, wherein the slope base is a polyamide resin molded body.   The slope base according to claim 1, wherein an arc-shaped depression approximate to the outer peripheral surface shape of the wheel to be placed is formed on the upper surface of the wheel placing portion.

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