JPH0534969Y2 - - Google Patents

Description

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

This invention relates to a lower support mechanism for a sliding door installed on a box-shaped loading platform of a truck.

[Conventional technology]

So-called one-box type trucks are usually equipped with a sliding door because it is convenient for loading and unloading from the side of the cargo compartment, and there is no need for space to open and close the door. . Such a sliding door has rollers attached at three locations: at the top and bottom of the front end of the door, and at the middle of the rear end of the door in the vertical direction.
It is supported by sliding engagement with a guide rail provided on the vehicle body side so as to correspond to these. The guide mechanism consisting of each of the guide rails and rollers described above defines the trajectory of the door between the closed position where the door fits into the door opening and the open position where the door overlaps the outer skin of the vehicle body behind the door opening after being displaced outward from the vehicle interior. It also has the role of supporting the weight of the door itself against the vehicle body. The above-mentioned guide rail is formed in a downwardly open channel shape, and by slidingly fitting a vertical shaft roller attached to the door side into this channel-shaped guide rail, the path of the door is defined, and the guide rail It is common practice to form a lip on the lower edge of the door that points inward into the groove, and this lip supports the lower surface of the roller to support the weight of the door.

[Problem that the invention attempts to solve]

By the way, when installing a sliding door on the side of a specially designed box-shaped loading platform used as a dry van, refrigerator, freezer truck, etc., this sliding door is heavy due to its robust construction. The above-mentioned conventional support structure consisting of a guide rail and a guide roller is inappropriate as a support structure for a sliding door. In addition, in order to secure a large cargo space,
A conventional support structure in which a movement trajectory near the door closed position is obtained by curving a portion of the guide rail near the door closed position largely inward is inappropriate. This idea was devised under the above circumstances, and even if the weight of the sliding door is large, it can sufficiently support the weight, the sliding resistance is small, and the door can be placed in the closed position. The object of the present invention is to provide a new lower support structure for a sliding door in which the luggage compartment space is not reduced in order to secure a nearby trajectory.

[Means to solve the problem]

In order to solve the above problem, this invention takes the following technical measures. That is, the lower support mechanism of the sliding door of this invention includes a linear main rail provided on the upper surface of the lower side of the door opening so as to extend in the front and back direction, and at least two trochanters in the front and back that move on the main rail in the rail width direction. By rolling while the position is restricted to a certain level,
A running body that rides on the main rail and travels in the front-rear direction, and a sliding door that has one end located on the outside with respect to the running body, and one end of the running body is located at a position offset to the outside with respect to the main rail of the running body. A connecting body whose ends are hinged with vertical pivots, and has a guided portion in the middle; It is characterized by comprising a sub rail that extends parallel to the main rail, curves inward near the door closed position, and slides and guides the guided portion of the coupling body.

[Effect]

When the guided part is guided by the straight part of the sub-rail, the distance between the traveling body and the guided part in the vehicle width direction is constant, so the connecting body is at a fixed standing position with respect to the sliding door. is maintained. At this time, the sliding door is in a state where it is pushed out a certain amount to the outside of the vehicle with respect to the door opening, and is able to slide in the front-rear direction while overlapping with the outer surface of the vehicle body. Then, when the sliding door moves to the closed position,
Accordingly, the traveling body and the guided portion also move toward the closed position on the main rail and the sub rail, respectively. Near the closed position, the auxiliary rail is curved inward, so the distance between the guided portion and the traveling body in the vehicle width direction gradually decreases. However, since the distance between the guided part of the coupling body and the hinge part on the traveling body side is constant, the coupling body is forced to gradually rotate from the upright state to the folded state about the hinge part on the traveling body side. When the connecting body is rotated in this way, the position of the hinge on the sliding door side moves inward, which causes the sliding door to be drawn inward and eventually fit into the door opening in the vehicle width direction. Take a closed position. Further, when the sliding door moves from the closed position to the open position, the movement is opposite to that described above.

【effect】

In this way, in the sliding door lower support mechanism of the present invention, the traveling body connected to the sliding door via the connecting body runs on the main rail on the lower side of the door opening. Even if the weight of the sliding door is large, the main rail can sufficiently support the weight of the sliding door. Moreover, since the main rail, which substantially supports the weight of the sliding door, is linear, the sliding resistance remains constant at a low level throughout the entire stroke from the closed position to the open position, allowing the sliding door to be moved easily. In addition, by guiding the intermediate guided part of the connecting body with the sub-rail, the connecting body is rotated in the folding direction around the hinge part on the traveling body side, and at this time, the hinge part on the sliding door side is rotated in the vehicle width direction. Since the amount of movement in the vehicle width direction near the closed position of the sliding door is obtained by the movement, the amount of inward curvature of the auxiliary rail near the closed position can be reduced. Above all,
In the present invention, the hinge connection portion of the connecting body to the traveling body is set at a position offset outward from the main rail of the traveling body. Therefore, the distance between the traveling body side hinge joint portion of this coupling body and the guided portion to be guided by the auxiliary rail can be set to be very small. In this case, even if the amount of inward curvature of the auxiliary rail near the closed position is small, the connecting body can be largely rotated in the folding direction with respect to the traveling body. Therefore, in order to obtain a movement trajectory near the closed position of the sliding door, the cargo space or vehicle interior space in the conventional structure, which requires the guide rail to be curved to a large extent equivalent to the planned trajectory of the sliding door, is reduced. This solves the problem of In addition, in the present invention, the linear main rail and the sub-rail having a curved portion near the closed position are both arranged flatly on the upper surface of the lower side of the door opening, and furthermore, the sub-rail is arranged in a plane near the closed position of the sub-rail. Since the amount of curvature at the rail can be reduced, the width of the rail means consisting of the main rail and the sub rail in the vehicle width direction can be reduced, and the rail bulge toward the passenger compartment as in the conventional example is completely eliminated. .

[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 is supported with respect to the vehicle body via support mechanisms 2, 3, and 4 that slide and support the front upper end, the rear middle portion, and the front lower end in the front and rear directions. . The present invention relates to an improvement of the lower support mechanism 4 among these. On the upper surface of the lower side 6 of the door opening 5 of the vehicle body, a rail member 9 is provided, in which a main rail 7 and a sub-rail 8 are integrally formed.
is fixed. As shown in FIG. 3, the main rail 7 has a convex mountain-shaped cross section, and extends linearly over almost the entire width of the door opening 5. The sub rail 8 has a groove-shaped cross section, and most of the sub rail 8 extends in a straight line parallel to the main rail 7, and is located on the inside in the vehicle width direction near the closed position of the sliding door, that is, on the left side in FIG. The main rail 7 extends in a loosely displaced manner, and is entirely disposed outside the main rail 7. On the other hand, on the sliding door 1 side, the main rail 7 is
A running body 11 having a pair of front and rear rollers 10, 10 that rolls on top is attached to the slide door 1 and the running body 11 at both ends 12a, 12b via a connecting body 12 hinged to the sliding door 1 and the running body 11, respectively. In addition,
As clearly shown in FIG. 2, the hinge joint portion of the connecting body 12 on the side of the traveling body 11 is set at a position offset to the outside of the main rail 7 of the traveling body 11. Since the running body 11 is guided by the pair of front and rear rollers 10, 10 riding on the main rail 7, its direction does not change and it moves parallel to the front and back. Further, the hinge parts 12a and 12b at both ends of the connecting body 12 are connected to the hinge pin 1 in the vertical direction.
Since each member is configured to mutually rotate in a substantially horizontal plane around 3a and 13b, the downward load of the sliding door 1 is received by the main rail 7 via the connecting body 12 or the traveling body 11. . A vertical shaft roller 14 serving as a guided body that slides into the sub-rail 8 is attached to the lower surface of the intermediate portion of the connecting body 12 . Note that, as described above, since the traveling body side hinge joint portion of the connecting body 12 is set at a position deviated outward from the main rail 7, the hinge joint portion (hinge pin 13
a) and the longitudinal roller 14 can be made considerably smaller. When the sliding door 1 is in the opening direction, the main rail 7 on which the traveling body 11 is guided and supported and the auxiliary rail 8 on which the vertical roller 14 is slidably fitted extend parallel to each other at regular intervals in the vehicle width direction. Therefore, the connecting body 12 is in a certain undulating state as shown by the solid line in FIG. At this time, the sliding door 1 is in a state of being pushed outward in the vehicle width direction, and is movable in the front-rear direction while overlapping the outer panel of the vehicle body. On the other hand, when the sliding door 1 moves from the vicinity of the closed position to the closed position, the sub rail 8 that guides the vertical shaft roller 14 of the coupling body 12 is displaced inward, so that the movement trajectory is as shown in FIG. , connective body 1
2 is rotated in the folding direction about the hinge pin 13a on the traveling body side, and as a result, the sliding door 1 finally assumes the closed position shown by the imaginary line in FIG. As clearly shown in FIG. 2, the distance between the traveling body side hinge pin 13a and the vertical axis roller 14 is considerably small compared to the length of the connecting body 12. Even if the amount of displacement in the vehicle width direction on the closed position side is relatively small, the amount of rotational displacement of the door side hinge pin 13b of the connecting body 12 can be made considerably large. Conventionally, the guide rail that guides the door needs to be curved significantly to match the expected trajectory of the door, and to do so, one end of the guide rail must be curved significantly inward, which can compress the cabin space. Although there was a problem, according to this invention,
Such a large curved guide rail is not required, and the appearance of the door opening can be improved and the cargo space can be secured. Moreover, in this invention,
Since the main rail that supports the weight of the door and the auxiliary rail that provides a constant trajectory of the door are constructed separately, sufficient weight support and smooth movement of the door can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a truck having a box-shaped loading platform with a sliding door, FIG. 2 is a plan view of the main part of the present invention, and FIG. 3 is a sectional view taken along the line -- in FIG. 1...Sliding door, 5...Door opening, 7...
Main rail, 8... Sub-rail, 11... Traveling body, 1
2... Connecting body, 14... Guided part (vertical axis roller).

Claims (1)

[Scope of utility model registration request] A linear main rail provided on the upper surface of the lower side of the door opening so as to extend in the front and back direction, and at least two front and rear rails.
A traveling body that runs on the main rail in the front-rear direction by rolling the trochanters on the main rail while regulating the position in the rail width direction to a certain extent;
One end of the traveling body is hinged to a position offset to the outside with respect to the main rail, and the other end is hinged to a sliding door located outside of the traveling body with a vertical axis, and a connecting body having a guided portion in the middle; the entire body is disposed outside the main rail on the upper surface of the lower side of the door opening; most of the connecting body extends parallel to the main rail; and curves inward near the door closed position. A lower support mechanism for a sliding door, further comprising a sub-rail that slides and guides the guided portion of the connecting body.