JPH056174Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a rear support structure for a sliding door provided on a box-type loading platform of a truck.

[Conventional technology]

The box-shaped loading platform of trucks used as dry vans, refrigerated trucks, freezer trucks, etc. is equipped with a sliding system because it is convenient for loading and unloading from the side of the loading platform, and there is no need for space to open and close the door. Doors are increasingly being installed. The sliding door of such a box-shaped cargo bed is similar to the sliding door of a so-called one-box type truck, and is installed in three places: at the top and bottom of the front end of the door, and at the vertical middle part of the rear end of the door. The rollers are supported by sliding engagement with guide rails provided on the loading platform side so as to correspond to these rollers. Of the slide rails mentioned above, the rails that support the rollers at the top and bottom of the front end of the door are installed along the top and bottom edges of the door opening, and extend in the front and rear direction with a length generally equal to the front and rear width of the door. A curved portion that curves inward in the vehicle width direction is formed at the front end. This curved part allows the door to fit into the door opening from the outside in the vehicle width direction when the door is closed, and when it opens, the door is further deviated outward from the outer surface of the loading platform, causing an overlap with the outer surface of the loading platform. It is required to be able to move in a state where the On the other hand, a guide rail that supports the roller at the intermediate portion of the rear end of the door is provided so as to extend rearward from the rear edge of the door opening to the side wall of the loading platform. In order to ensure the movement of the door as described above, a curved portion that curves inward in the vehicle width direction is also generally required at the front end of the guide rail, that is, near the rear edge of the door opening.

[Problem that the invention attempts to solve]

By the way, forming a pillar with a box cross section extending from the floor to the ceiling along the rear edge of the door opening of the box-shaped loading platform as described above is a good idea to prevent vibrations and external forces caused by opening and closing the door. This is absolutely necessary in order to counteract this problem and ensure the rigidity of the entire loading platform. However, in this case, the curved portion of the guide rail that supports the roller at the rear end of the door will tend to overlap with the pillar, making it difficult to arrange the pillar and the curved portion of the guide rail relative to each other. Normally, the curved part of the rail above forms a bag part between the pillar and the rear end of the door, and the bag part and the guide rail are accommodated and supported inside. As a result, the mutual structure becomes complicated and assembly workability deteriorates, and the support structure consisting of guide rails and rollers has to be made weak, which causes problems in the support strength of the door. arise. It is also conceivable to provide the pillar at a distance from the door opening, but in that case, a decrease in the strength of the door opening is unavoidable. This invention aims to solve the above-mentioned conventional problems and provide a structure that conveniently supports the rear part of a sliding door while maintaining both the door support strength and the door opening strength at a high level.

[Means to solve the problem]

In order to solve the above problem, this invention takes the following technical measures. That is, in the rear support structure of a sliding door of this invention, a pillar part having a box cross-section extending in the vertical direction is formed by an outer panel at the rear edge of the door opening and an inner panel having a substantially U-shaped cross section arranged inside the outer panel. A rail housing groove is formed to extend in the vertical direction along the rear edge of the door opening, and the front end of a rail housing groove formed in the outer panel to extend in the front and back direction communicates with the inside of the pillar part, and a rail housing groove is formed to extend in the vehicle width direction inward at the front end. A guide rail having a curved part is installed so that the curved part is fixed to the inner panel inside the pillar part, and the rear straight part is received and fixed in the rail accommodation groove, while the rear part of the sliding door is fixed to the inner panel. It is characterized in that a roller attached to the intermediate portion is slidably engaged with the guide rail.

[Action and effect]

In this invention, the curved part in the vehicle width direction, which is essential at the front end of the slide rail, is placed inside the pillar part by communicating the rail accommodation groove of the outer panel with the inside of the pillar part, and at the same time, it is placed inside the pillar part. It is fixed against. Therefore, a guide rail of sufficient strength can be installed without any problem without having to worry about the planar alignment between the pillar and the curved portion of the guide rail, as in the conventional case. In addition, since the inner panel of the pillar part separates the cargo compartment from the outside, there is no need to provide a bag part to accommodate the front end of the guide rail, and the curved part of the guide rail is separated from the pillar part. It can be attached directly to the inner panel of the unit, and costs can be expected to be reduced by reducing the number of parts and improving workability. Furthermore, as mentioned above, the support strength of the sliding door is greatly improved because a guide rail with sufficient strength can be used and the front end of the guide rail can be directly attached to the strong pillar part. . Furthermore, since the pillar portion is formed along the rear edge of the door opening, the strength of the door opening is strong enough to withstand the opening and closing of the heavy door and vibrations.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. As shown in FIG. 1, the sliding door 1 has a roller provided at the upper end of its front portion that connects to an upper guide rail 4 provided at the upper edge of the door opening 3, and a roller provided at the lower end of the front portion that connects the door opening 3 to an upper guide rail 4 provided at the upper edge of the door opening 3. A lower guide rail 6 provided at the lower edge of the door opening 3 is provided with a roller 14 provided at the rear intermediate portion so as to extend rearward on the outer panel 8 from a vertically intermediate position of the rear edge of the door opening 3. 9, by slidingly engaging with each other, it is supported so that it can be slid forward and backward to be opened and closed. This invention relates to an improvement of the rear support structure of the sliding door 1, which is composed of the rollers 14 and the intermediate guide rail 9. The details are shown in Figure 2 and below. As shown in FIGS. 2 and 3, the door opening 3
Inside the outer panel 8 located at the rear edge 3a, an inner panel 10 having a generally U-shaped cross section is provided.
By welding along the rear edge portion 3a, a box-shaped pillar portion 11 extending in the vertical direction is formed.
On the other hand, as shown in FIG. 4, in the outer panel 8, a rail accommodation groove 12 extending in the front-rear direction is formed by press molding, and the front end 12a of this accommodation groove 12 is connected to the inner space of the pillar part 11. is communicated with. In the embodiment, the front part of the rail housing groove 12 is cut out, and the pillar part 1 is removed.
1 by deforming a suitable part of the inner panel 10, applying it to the back side of the rail housing groove 12, and welding it.
At the same time, the outer panel 8 in front of the rail accommodating groove 12 is cut out to open a part of the pillar portion 11 corresponding to the height of the rail accommodating groove 12. This opening 13 is an escape through which a roller 7 or its support arm 15, which will be described later, is attached to the sliding door 1 side. Then, the guide rail 9 is attached to extend from the rail housing groove 12 to the inside of the pillar portion 11. That is, this guide rail 9 is
It has a rear straight part 9b and a curved part 9a that curves inward in the vehicle width direction at the front end, but the rear straight part 9b
into the rail accommodation groove 12 on the outer panel 8,
The curved portions 9a are attached to the pillar portions 11 while being accommodated in the internal spaces thereof. In particular, the front curved portion 9a is fixed to the inner panel 10 constituting the pillar portion 11 in the interior space of the pillar portion 11, so that the pillar portion having a box cross-section extending in the vertical direction is fixed. 1
Since it is fixed to the inner panel of the pillar portion 11, which inherently has high rigidity, while making effective use of the internal space of the curved portion 9a, the support strength of the curved portion 9a is significantly improved. On the other hand, the roller 7 at the rear of the sliding door 1 is attached in the following manner in this example. That is, a first arm 15a extending inward in the vehicle width direction at the rear of the sliding door 1 is fixed, and a second arm 15b is connected to the first arm 15a so as to be rotatable around a vertical axis. Arm 15b
A pair of front and rear vertical axis rollers 1 rotate around a vertical axis.
4a, 14a, and a horizontal roller 14b that rotates around a horizontal axis. As shown in FIG. 4, the guide rail 9 is connected to the vertical shaft roller 14.
The downward channel section 1 includes a downward channel section 16 that accommodates and guides both sides of the rollers a and 14a, and a horizontal wall section 17 that receives the horizontal axis roller 14b on its upper surface.
6 and the vertical shaft rollers 14a, 14a, the position of the sliding door 1 in the vehicle width direction is regulated, and the horizontal wall portion 17 rests on the horizontal shaft roller 14b, so that the load of the sliding door 1 is supported by the vehicle body. It's becoming like that. When the sliding door 1 is opened from the closed state shown in FIG.
Since the second arm 15b having a curved shape rotates in the direction of arrow A in accordance with the bending of the curved portion 9a of the guide rail 9 and pushes the first arm 15a or the slide door 1 outward in the vehicle width direction, the curve of the guide rail 9 is prevented. Even though the amount of deviation of the portion 9a in the vehicle width direction is relatively small, the amount of deviation of the sliding door 1 in the vehicle width direction becomes large. Note that reference numeral 18 in the figure is a latch mechanism provided between the inner panel at the rear end of the door and the outer surface of the pillar section 11 in order to maintain the closed state of the door. As described above, in the rear support structure of the sliding door of the present invention, the front curved part of the guide rail that slides and holds this part is arranged inside the pillar that communicates with the rail accommodation groove of the outer panel.
A guide rail with sufficient strength can be installed without any problem, the support strength of the sliding door is improved, and the strength of the door opening is not reduced. Of course, the scope of this invention is not limited to the above-described embodiments, and for example, the general cross-sectional shape of the pillar portion, the cross-sectional shape of the guide rail, and the configuration of the rollers that slide into engagement with the pillar portion can be modified in various ways. be.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a truck with a box-shaped loading platform with a sliding door, Fig. 2 is a sectional view of the pillar portion formed at the rear edge of the door opening, and Fig. 3 is a -
FIG. 4 is an enlarged sectional view taken along the line, and is a view taken along the - line in FIG. 3 with the rollers in the straight portion of the guide rail. 1...Sliding door, 3...Door opening, 8...
Outer panel, 9... Guide rail, 9a...
Curved part (of the guide rail), 9b... Straight part (of the guide rail), 10... Inner panel, 11...
...Pillar portion, 12...Rail accommodation groove, 14...Roller.

Claims (1)

[Scope of utility model registration request] An outer panel at the rear edge of the door opening and an inner panel with a substantially U-shaped cross section arranged inside the outer panel form a box-shaped pillar section extending vertically along the rear edge of the door opening. At the same time, the front end of the rail housing groove formed in the outer panel so as to extend in the front-rear direction is communicated with the inside of the pillar part, and a guide rail having a curved part inward in the vehicle width direction at the front end is connected to the curved part. is fixed to the inner panel inside the pillar part, and the rear straight part is housed and fixed in the rail accommodation groove, while the roller attached to the rear intermediate part of the sliding door is slid onto the guide rail. characterized by being engaged;
Rear support structure for sliding doors.