JPS6238407Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a center rail for a sliding door of an automobile.

Conventionally, center rails for automobile sliding doors have been made by bending a belt-shaped stainless steel plate into a U-shape for corrosion prevention reasons, and attaching it to a recess formed in the front-rear direction on the side wall of the main body. Due to this relationship, a gap is created between the recess and the center rail, and rainwater enters through this gap, corroding the steel plate recess facing the center rail mounting surface, and water leakage from the center rail mounting hole is unavoidable. , stainless steel alone has the disadvantage of being expensive, and when the rollers attached to the sliding door roll or slide on the surface of the center rail, they generate a lot of noise and vibration, and what's more, they cause damage to the center rail. The disadvantage was that it was transmitted directly to the vehicle body through the cable.

This invention provides a center rail structure that eliminates the above-mentioned drawbacks and can be manufactured using inexpensive materials. Japanese Utility Model Application Publication No. 55-107416 relates to a center rail mounting structure, and discloses mounting a buffer member between the rail and the groove to prevent interference.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view of a van-type automobile. In the figure, 1 is a center rail attached to a recess provided in the longitudinal direction on the outer wall of the vehicle body, and 2 is a center rail that is guided by this center rail 1 and is attached to the vehicle body. This is a sliding door that can be moved parallel to the side wall.

The conventional center rail 1A is A-A in Fig. 1.
As shown in Fig. 2 in cross section along the line, it is formed by bending a stainless steel plate into a substantially U-shape, and is attached to an arm 3A protruding from the sliding door 2A so as to be rotatable about the vertical axis. It has an inverted U-shaped rolling guide surface 5A for guiding the guide roller 4A, and a rolling guide surface 10A for a load supporting roller 9A rotatably attached to the arm about the horizontal axis. Such a center rail 1A has a recess 7 with a bolt 11A and a nut.
A is fixed at several places, but in that case, rainwater etc. can enter between the upper and lower edges of the center rail and the recess 7A made of steel plate, causing corrosion to occur in the recess 7A, and the bolt 11A is more likely to corrode. There is a problem with water getting inside. Furthermore, since the center rail 1A is exposed to the outside and is exposed to rain and dust, stainless steel, which is resistant to rust, is generally used, but it has the drawback of being relatively expensive.

Furthermore, as mentioned above, when the load support roller 9A rolls or slides on the guide surface 10A of the center rail 1A, the noise and vibration generated are large, and furthermore, there is a drawback that these noises and vibrations are transmitted directly to the vehicle body via the center rail. .

In this invention, most of the center rail is made up of a substantially U-shaped steel plate and a covering member made of rubber or resin, and a stainless steel band plate is used only on the loose guide surface of the load supporting roller. By integrally configuring them, the various drawbacks mentioned above can be eliminated all at once.

FIG. 3 shows one embodiment of the present invention, which is shown as a cross section taken along the line A--A in FIG. 1, similar to the conventional example.

As shown in the figure, in a center rail provided in a recess 7 made of a steel plate in the longitudinal direction of the side wall of the main body of an automobile, the center rail 1 is made of a steel plate having a substantially U-shaped cross section. The entire surface of the U-shaped inner surface or the outer surface of the vehicle body, except for the rolling guide surface 5 of the guide roller 4, which is rotatably attached to the arm 3 projecting from the sliding door 2 on a vertical axis, is made of a soft material made of rubber or resin. This covering member 6 is further extended from the edge of the center rail 1, and the recess 7 is covered with a covering member 6.
A rolling surface of the center rail 1 on which a load supporting roller 9 rolls, which is brought into contact with the recess 7 and forms a seal 8 between it and the arm 3 of the sliding door 2 so as to be rotatable about the horizontal axis. A reinforcing strip plate 10 made of stainless steel is extended therein.

In this invention, as mentioned above, the center rail 1 is tightly attached to the recessed part of the main body via the seal part 8 provided by extending the covering member of the center rail 1, so that rainwater etc. cannot enter the inside. can be prevented.

Therefore, not only can corrosion of the recess 7 of the main body, which is the mounting surface of the center rail 1, be prevented, but also water leakage from the mounting surface into the interior of the vehicle can be avoided. Further, on the rolling surface of the load supporting roller 9, a strip plate 10 made of stainless steel is provided.
Since it is extended, there is no problem with its function as a rolling surface and there is no corrosion.

Furthermore, as described above, the soft covering member 6 covers the entire surface of the center rail 1 except for the rolling guide surface 5 of the guide roller 4, and is further extended from the edge of the rail 1 to come into contact with the recess 7. In addition, the stainless steel strip plate 10 extends over the covering member 6. In this way, the center rail 1 minimizes the generation and transmission of sound and vibration by using the covering member.
It has a structure that absorbs and relaxes. In this case, since the rolling guide surface 5 is not covered as described above, the guide rollers 4 are in direct contact with the center rail 1 made of steel plate, so that they can slide and roll easily as in the conventional structure. It's summery. Therefore, the noise and vibration generated by the rolling or sliding of the load supporting roller 9 are reduced by the absorption and buffering effect of the covering member 6, and furthermore, the influence on the vehicle body side is also greatly reduced.

Furthermore, the laminated plate made of a steel plate, a soft covering member made of rubber or resin, and a strip plate made of stainless steel plate for producing the center rail of the present invention can be integrally formed by triple extrusion. , it can be obtained at a lower cost than when it is made only of conventional stainless steel.

[Brief description of the drawings]

Figure 1 is a schematic side view of a van-type vehicle equipped with a sliding door, and Figure 2 is A-A in Figure 1.
Fig. 3 is an enlarged cross-sectional view along a line showing a conventional center rail holding a roller attached to a sliding door, and Fig. 3 is a cross-sectional view similar to Fig. 2 showing the structure of a center rail according to the present invention. be. 1... Steel plate center rail, 2... Sliding door, 3... Arm, 4... Guide roller, 5...
... Rolling surface, 6 ... Soft covering member made of rubber or resin, 7 ... Main body side wall recess, 8 ... Seal portion, 9 ... Load support roller, 10 ... Stainless steel strip plate for reinforcement, 11 ... ...Center rail tightening bolt.

Claims (1)

[Scope of utility model registration request] In a center rail 1 provided in a recess 7 in the longitudinal direction of the side wall of an automobile body, the center rail 1 is made of a steel plate with a substantially U-shaped cross section, and the U-shaped inner surface of the center rail 1 or the outer surface of the vehicle body Then, the guide roller 4 provided on the sliding door 2
The entire surface except the rolling guide surface is covered with a rubber or resin covering member 6, and this covering member 6 is further extended from the edge of the center rail 1 and brought into contact with the recess 7 to form a seal portion 8. Furthermore, a reinforcing stainless steel strip plate 10 is provided extending on the upper surface of the covering member 6 on the rolling surface of the center rail 1 on which the load supporting roller 9 of the sliding door 2 rolls. Structure of door center rail.