JP7449620B1 - Door opening/closing system - Google Patents

Abstract

[Problem] To provide a door opening/closing system that allows easy loading and unloading of large cargo. [Solution] A door opening/closing system for a vertically folding door provided at an opening of a vehicle having a storage compartment, the system includes a fixed shaft for holding the vertically folding door in a closed state, and a lower part. an engaging part that is rotatably fixed to the door and engages with the fixed shaft when the door is closed; a chain that extends over the upper sprocket and the lower sprocket and to which the engaging part is fixed; a driving part that is attached to the ceiling and rotates the upper sprocket; a guide part that stands up on the side of the opening; and an elevator part that is arranged at the lower end of the lower door and moves up and down along the guide part. When the driving part is driven and the chain rotates, the vertical folding door opens and closes via the engaging part while moving the position of the lower sprocket using the upper sprocket as a fulcrum. [Selection diagram] Figure 7

Description

The present invention relates to, for example, a door opening/closing system for opening and closing a door of a widened part in a widened vehicle in which the side surface of the vehicle body is widened.

BACKGROUND ART Width-expanding vehicles (for example, see Patent Document 1) have been known that include a box-shaped widening section (capsule type) that widens from the side surface of the vehicle body. In such widened vehicles, the widened section slides while floating above the floor of the vehicle body, so heavy objects cannot be loaded on the widened section, and heavy objects cannot be loaded onto the floor of the vehicle body where the widened section is not located. I have no choice but to load it.

Therefore, when loading a heavy load on a widened vehicle, for example, as shown in FIG. It can be considered to be used for loading purposes.

In this type of widened vehicle, it is also conceivable to extend the widened portion 102' over the entire vehicle body 104', as shown in FIG. 30(b). In this case, the widened part 102' is not provided with a floor so that heavy objects can be loaded on the floor of the vehicle body 104' in both the stored state where the widened part 102' is stored and the widened state where the widened part 102' is widened. It is conceivable to design a mechanism for deploying the floor of the widened portion 102' in other ways.

However, even if such a type of widened vehicle were to be realized, the panel 108 on the rear surface of the widened part 102' would be an obstacle to loading and unloading, so it would be difficult to load and unload cargo with the widened part 102' in the stored state. The problem arises that it is not possible.

JP2013-032126A

In order to solve the above-mentioned problems, it is conceivable to provide a large opening 110 in the rear panel 108 as shown in FIG. There was a problem in that the threshold of the opening became an obstacle when loading and unloading a caster-equipped cargo tenor loaded with heavy objects from the rear surface of the vehicle.
Further, when a sliding door is provided in the large opening 110, there is a problem that the opening size is insufficient.

An object of the present invention is to provide a door opening/closing system that allows easy loading and unloading of large cargo.

According to the door opening/closing system of the present invention,
In a widened vehicle having a widened part that widens in the width direction of the side surface of the vehicle, a door opening/closing system for a vertical folding door provided at an opening in a rear wall located at the rear of the widened part in the traveling direction ,
a fixed shaft for holding the vertical folding door in a closed state;
an engaging portion rotatably fixed to the lower door of the upper door and the lower door constituting the vertical folding door, and engaging with the fixed shaft in the door closed state;
a chain that spans over an upper sprocket and a lower sprocket and has the engaging portion fixed;
a drive unit that is attached to the ceiling of the widened section and rotates the upper sprocket;
a guide section erected on the side of the opening;
an elevating part that is disposed at the lower end of the lower door and moves up and down along the guide part,
The drive unit is driven and the chain rotates, thereby opening and closing the vertical folding door via the engaging unit while moving the position of the lower sprocket using the upper sprocket as a fulcrum. do.

In this way, by making the rear opening door a vertically folding door, a large frontage can be obtained, and large cargo can be easily loaded and unloaded. In addition, since the chain is rotated to open and close the vertical folding door, the vertical folding door can be smoothly closed when changing from the open state to the closed state without suddenly closing due to its own weight.
Further, by the engaging portion engaging with the fixed shaft, the vertical folding door can be accurately locked in the door closed state.

Furthermore, according to the door opening/closing system of the present invention,
The engaging portion is formed with a notch inclined downward at a predetermined angle with respect to a perpendicular line;
The fixed shaft slides within the notch when the door is opened and closed;
In the door closed state, the notch portion bottoms out on the fixed shaft.

By sliding the fixed shaft within the inclined notch in this way, it is possible to smoothly open and close the door in accordance with the behavior of the lower sprocket, which swings about the upper sprocket. Further, in the door closed state, the notch portion bottoms out on the fixed shaft, so that the vertical folding door can be accurately locked in the door closed state.

According to the present invention, it is possible to provide a door opening/closing system that allows easy loading and unloading of large cargo.

FIG. 1 is a perspective view of a widened vehicle according to an embodiment viewed from above. FIG. 2 is a perspective view showing a state in which the width of the widened portion is widened in the widened vehicle according to the embodiment. FIG. 2 is a perspective view showing a widened portion of the widened vehicle according to the embodiment in a widened state. It is a figure showing the widening part moving mechanism concerning an embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on embodiment. FIG. 7 is a diagram illustrating a state in which the extension portion is fitted into the first groove portion in the widening portion moving mechanism according to the embodiment. FIG. 1 is a diagram showing a door opening/closing system according to an embodiment. It is a figure showing the movement transition of the engagement part of the door opening-and-closing system concerning an embodiment. In the door opening/closing system according to the embodiment, it is a perspective view showing a state in which the engaging portion is engaged with the fixed shaft. It is a figure showing transition from a door closed state to a door open state of the door opening and closing system concerning an embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. FIG. 7 is a diagram illustrating a state in which a convex annular portion is fitted into a second groove in a widening portion moving mechanism according to another embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure which shows the widening part moving mechanism based on other embodiment. It is a figure which shows the slide frame of the widening part moving mechanism based on other embodiment. It is a figure showing the door opening and closing system concerning other embodiments. It is a perspective view showing the crank part of the door opening and closing system concerning other embodiments. It is a figure showing the latch mechanism of the door opening and closing system concerning other embodiments. It is a figure which shows both the door open state and intermediate state of the door opening/closing system concerning other embodiments. FIG. 2 is a conceptual diagram showing a conventional widened vehicle. It is a conceptual diagram which shows the widened vehicle provided with another conventional widened part.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the door opening/closing system and the widening part moving mechanism which concern on embodiment of this invention are demonstrated. FIG. 1 is a perspective view of a widened vehicle 2 according to an embodiment viewed from above.
In the following description, "front" refers to the traveling direction of the widened vehicle 2, and "rear" refers to the opposite side to the traveling direction of the widened vehicle 2.

The widened vehicle 2 includes a vehicle main body 8 consisting of a driver's seat 4 and a cargo compartment 6, and is provided with a widened floor section 10, which will be described later, on the side of the cargo compartment 6, for loading and unloading cargo at the rear of the cargo compartment 6 of the vehicle main body 8. It is provided with a loading opening 11 for storage. Note that FIG. 1 shows a stored state in which the widened portion 12 is stored within the vehicle main body 8.

Here, in the stored state, the widened floor part 10 constitutes a side wall of the vehicle body 8, as shown in FIG. 1, and as shown in FIGS. When the width is widened, the bottom portion is opened as an axis to form the floor portion of the widened portion 12.

Here, the widening section 12 has a box-like shape without its own floor, and includes a ceiling panel 14, a front wall 18 having a front opening 16, a rear wall 22 having a rear opening 20, and a side in the width-widening direction. It is provided with a side wall 24 of. That is, the widened vehicle 2 according to the embodiment includes a box-shaped (capsule-shaped) widened portion 12 that is widened in the width direction of the side surface of the vehicle main body 8.

As shown in FIG. 4, a threshold 18a is arranged on the bottom surface of the front wall 18, and a sliding door 16a is provided in the front opening 16. By providing the sliding door 16a in the front opening 16 in this way, it becomes possible to go back and forth between the driver's seat 4 and the cargo compartment 6 in the stored state.

The rear wall 22 is a Π-shaped arm wall with no bottom, and the rear opening 20 is provided with an up-and-down folding door 20a that bends toward the front in a dogleg shape. A drive unit 48 is provided above the rear wall 22 of No. 12 to open and close the vertical folding door 20a. Note that the opening/closing operation of the vertical folding door 20a by the drive unit 48 will be described later.

The widened portion 12 is placed on a slide frame 32 shown in FIG. The slide frame 32 has a front part 32a that contacts the threshold 18a of the front wall 18, a rear part 32b that contacts the bottom of the rear wall 22, and a side part 32c that connects the front part 32a and the rear part 32b in the width direction side. It has a U-shape. Note that a front wheel 33a is provided at the end of the front portion 32a in the widened storage direction, a rear wheel 33b is provided at the end of the rear wall 22 in the widened storage direction, and a rear wheel 33b is provided at the end of the rear wall 22 in the widened storage direction. , a central wheel 33c is provided. Note that when the front wheels 33a, the rear wheels 33b, and the center wheels 33c are collectively referred to, they are simply referred to as wheels 33.

On the other hand, a guide rail 30 on which a slide frame 32 slides is arranged on the floor surface 8a of the vehicle body 8 and the surface of the widened floor section 10 in the widened state so as to communicate with the floor surface 8a of the vehicle body 8 and the widened floor section 10. ing.

The guide rail 30 includes a front guide rail 30a on which a front wheel 33a runs, a rear guide rail 30b on which a rear wheel 33b runs, and a middle guide rail 30c on which a center wheel 33c runs. The front guide rail 30a is located at a position corresponding to the front part 32a of the slide frame 32 that contacts the front wall 18, and the rear guide rail 30b corresponds to the rear part 32b of the slide frame 32 that contacts the rear wall 22. It is located in a position where

Here, the front guide rail 30a and the rear guide rail 30b are disposed over approximately the entire width of the floor surface 8a of the vehicle body 8 and the widened floor portion 10, respectively, in the widened state. Further, the middle guide rail 30c is disposed over approximately the entire width of the surface of the widened floor portion 10, and is partially disposed on the widening direction side of the floor surface 8a of the vehicle body 8. That is, the front guide rail 30a, the middle guide rail 30c, and the rear guide rail 30b all communicate with the floor surface 8a of the vehicle body 8 and the widened floor portion 10.
Thereby, when the widened portion 12 is widened and stored, the slide frame 32 slides on the guide rail 30 with the widened portion 12 placed thereon.

FIG. 6(a) is a diagram showing a state in which the front wheel 33a is in contact with the front guide rail 30a. As shown in FIG. 6A, the front guide rail 30a has a flat bar shape, and front wheels 33a pivotally supported by the slide frame 32 run on the guide rail 30. As shown in FIG. Although not shown, the state in which the center wheel 33c is in contact with the middle guide rail 30c is also the same as that shown in FIG. 6(a).

FIG. 6(b) is a diagram showing a state in which the rear wheel 33b is in contact with the rear guide rail 30b. As shown in FIG. 6(b), an extending portion 32x (sliding plate) extends below the rear wheel 33b at a location where the rear wheel 33b of the rear portion 32b is located.

Further, a bent member having a hat-shaped cross section is used for the rear guide rail 30b, and a first groove portion 30x into which the extension portion 32x fits is formed in the gap formed by the hat portion.

Note that, as shown in FIG. 5, the main body of the rear part 32b of the slide frame 32 exists only at the location where the rear wheel 33b is located, and the main body of the slide frame 32 does not exist at the position corresponding to the rear opening 20. First, only the extension portion 32x exists. Note that the portion of the slide frame 32 that does not include the extension portion 32x is referred to as the slide frame 32 main body.

Next, a door opening/closing system 40 for the vertical folding door 20a according to the embodiment will be described. FIG. 7(a) is a view of the door opening/closing system 40 when the vertical folding door 20a is fully closed, viewed from the side of the widened part 12, and FIG. It is a figure seen from.

As shown in FIGS. 7(a) and 7(b), the door opening/closing system 40 includes a vertical folding door 20a consisting of an upper door 42a and a lower door 42b, a chain 46 meshed with an upper sprocket 44a and a lower sprocket 44b, and a chain 46, a guide portion 49, a fixed shaft 50, and an engaging portion 52.

As shown in FIGS. 8(a) to 8(c), the engaging portion 52 is formed with a notch portion 52a extending downward, the center line P of which is inclined at a predetermined angle with respect to the perpendicular line.
FIG. 9 is a perspective view showing a state in which the engaging portion 52 is engaged with the fixed shaft 50 in a closed state in which the vertical folding door 20a is closed. As shown in FIG. 9, the fixed shaft 50 is fixed to the inside of the side wall 24 of the widened portion 12, and the engaging portion 52 is rotatably fixed to the lower door 42b. In this manner, the engaging portion 52 engages with the fixed shaft 50 in the door closed state, whereby the vertical folding door 20a is held in the closed door state.

The chain 46 is stretched over the upper sprocket 44a and the lower sprocket 44b, and the engaging portion 52 is fixed.
The drive section 48 is attached to the ceiling panel 14 of the widened section 12, and has an upper sprocket 44a fixed to a rotating shaft (not shown). That is, the upper sprocket 44a rotates when the drive unit 48 is driven. Note that a motor is generally used for the drive unit 48.

The guide portion 49 has a U-shaped cross section with a groove formed therein, and is erected on both sides of the rear opening 20 . Further, at the lower end of the lower door 42b, an elevating portion 43 that is disposed within the groove of the guide portion 49 and moves up and down along the guide portion 49 is provided. A bearing is generally used for the elevating part 43. Thereby, the vertical folding door 20a can be opened and closed without leaving the rear opening 20.

Next, the behavior of the door opening/closing system 40 will be explained. Here, FIG. 10(a) shows a door closed state where the vertical folding door 20a is closed, and FIG. 10(b) shows a door intermediate state where the vertical folding door 20a is between the door open state and the door closed state. , FIG. 10(c) is a diagram showing the door open state in which the vertical folding door 20a is opened.

First, when the "open" button (not shown) is operated in the closed state where the vertical folding door 20a is closed, the drive unit 48 causes the chain 46 to move in the door opening direction (FIG. 8(a)) via the upper sprocket 44a. ).

As a result, the engaging portion 52 fixed to the chain 46 moves upward, and the engaging portion 52 engaged with the fixed shaft 50 is released from the locked state. At this time, since the engaging part 52 moves while the inclined notch 52a slides on the fixed shaft 50, the engaging part 52 is moved by the fixed shaft 50 to the widened part 12, as shown in FIG. 8(a). being pushed forward. As a result, the lower sprocket 44b moves in a direction away from the guide portion 49 using the upper sprocket 44a as a fulcrum.

Furthermore, as the fixed shaft 50 slides in the notch 52a and the engagement part 52 is pulled up diagonally, the lower door 42b, which is rotatably fixed to the engagement part 52, also moves diagonally. It is pulled upward, and the vertical folding door 20a is bent forward into a dogleg shape. At the same time, the elevating section 43 rises along the guide section 49.
Thereby, the vertical folding door 20a transitions from the door closed state to the door intermediate state (see FIG. 10(b)).

Further, the engaging portion 52 is pulled upward and the lower sprocket 44b moves away from the guide portion 49, so that the vertical folding door 20a transitions from the door intermediate state to the door open state (see FIG. 10(c)).
On the other hand, when the "close" button is operated in the door open state, the door opening/closing system 40 takes a behavior opposite to that described above, and moves from the door open state to the door closed state via the door intermediate state.

FIGS. 8(b) and 8(c) are diagrams showing a state in which the door intermediate state transitions to the door closed state. As shown in FIG. 8(b), when transitioning from the door intermediate state to the door closed state, the engaging portion 52 moves while the inclined notch 52a slides on the fixed shaft 50, so that the fixed shaft 50 guides the engaging portion 52 to the rear side of the widened portion 12.
As a result, the lower sprocket 44b moves toward the guide portion 49 using the upper sprocket 44a as a fulcrum.

Furthermore, as the fixed shaft 50 slides through the notch 52a and the engaging part 52 is pulled diagonally downward, the lower door 42b, which is rotatably fixed to the engaging part 52, also moves diagonally. At the same time as being pulled downward, the elevating section 43 descends along the guide section 49.

In this way, the vertically folding door 20a, which had been bent into a dogleg shape, is closed and closed on the same plane as shown in FIG. , the engaging portion 52 engages with the fixed shaft 50 to shift to a locked door closed state.

According to the invention according to this embodiment, since the main body of the slide frame 32 does not exist at the position of the rear opening 20, there is no step at the rear of the vehicle body, and large cargo can be easily loaded and unloaded. Moreover, since the slide frame 32 does not require any special design and can be easily realized, a cost-saving widening portion moving mechanism can be realized.

Furthermore, even if the rear wall 22 of the widened portion 12 is a Π-shaped arm wall without a bottom, it can maintain appropriate rigidity because both sleeve portions of the arm wall are connected by the extension portion 32x. , and a large rear opening 20 can be provided.

Further, since the widened portion 12 moves while running on the guide rail 30, even when the widened portion 12 is in the stored state stored in the vehicle body 8, the widened portion 12 is in the widened state where it is widened from the vehicle body 8. Even if there is, cargo can be loaded and unloaded from the rear opening 20.

Further, since the widened portion 12 slides while the extended portion 32x is fitted into the first groove portion 30x, the widened portion 12 can be moved in the widening/storage direction in a stable state.
Moreover, according to the door opening/closing system 40 according to the embodiment, by using the vertical folding door 20a, there is no need to provide a threshold at the rear opening 20, and a large frontage can be provided. Therefore, large cargo can be easily loaded and unloaded.

In addition, since the chain 46 is rotated to open and close the vertical folding door 20a, the vertical folding door 20a can be smoothly closed without being abruptly closed by its own weight when transitioning from the door open state to the door closed state. Can be done.
In addition, by engaging the engaging portion 52 with the fixed shaft 50, the vertical folding door 20a can be accurately locked in the closed state.

In the above-described embodiment, as shown in FIGS. 4 and 5, the extended portion 32x and the first groove portion 30x at the rear of the vehicle body span approximately the entire width of the floor surface 8a of the vehicle body 8 and the widened floor portion 10, respectively. Although the case where the first groove portion 30x is disposed across the entire length of the widened floor portion 10 at the rear guide rail 30b and the widened floor surface 8a of the vehicle main body 8 is illustrated as shown in FIGS. It may exist only in a part of the direction side. Also in this case, the main body of the slide frame 32 is not present at the position corresponding to the rear opening 20, and the rear portion 32b is present only at the position of the rear wheel 33b. Furthermore, the extending portion 32x exists only on the width-expanding direction side of the rear portion 32b of the slide frame 32.

Even in this case, there is no step at the rear of the vehicle, and large cargo can be easily loaded and unloaded. Further, since the widened portion 12 slides while the extended portion 32x is fitted into the first groove portion 30x, the widened portion 12 can be moved in the widening/storage direction in a stable state.

Further, in the above-described embodiment, as shown in FIGS. 13 and 14, the extension portion 32x and the first groove portion 30x are not provided, and the rear portion 32b of the slide frame 32 is located only at the location of the rear wheel 33b. You can also do this. Even in this case, since the main body of the slide frame 32 is not present at the position corresponding to the rear opening 20, there is no step at the rear of the vehicle body, and large cargo can be easily loaded and unloaded.

Further, in the above embodiment, as shown in FIG. 15(a), a convex annular portion 33x having a larger diameter than other portions is provided on the rotating side surface of the wheel 33 of the slide frame 32. Good too.

FIG. 15(b) is a diagram showing a state in which the wheel 33 provided with the convex annular portion 33x is in contact with the guide rail 30. As shown in FIG. 15(b), in the guide rail 30, the rotating side surface of the wheel 33 that does not include the convex annular portion 33x comes into contact with the main body of the guide rail 30.

Furthermore, a bent material having a hat-shaped cross section is used for the guide rail 30 on which the wheel 33 provided with the convex annular portion 33x comes into contact. A second groove portion 30y into which the convex annular portion 33x fits is formed in the gap forming the hat portion of the guide rail 30, and the convex annular portion 33x runs within the second groove portion 30y when the widened portion 12 moves.

Hereinafter, in the above-described embodiment, a widened part moving mechanism of a type in which the convex annular part 33x runs within the second groove part 30y when the widened part 12 is moved will be described.
For example, as shown in FIGS. 16 and 17, the slide frame 32 is not present at the position corresponding to the rear opening 20, the second groove 30y is provided over the entire length of the front guide rail 30a, and the rear guide rail It may be present over approximately the entire length of the widened floor portion 10 at 30b and only in a portion of the floor surface 8a of the vehicle body 8 on the widening direction side.

In this case, among all the front wheels 33a and rear wheels 33b, only the rear wheel 33b on the vehicle main body 8 side is a wheel that does not have the convex annular portion 33x.
By causing the convex annular portion 33x of the front wheel 33a to travel within the second groove portion 30y in this manner, the widened portion 12 can be moved in the widening/storage direction in a more stable state.

Further, as shown in FIGS. 18 and 19, the second groove portion 30y is provided over the entire length of the front guide rail 30a and the rear guide rail 30b, and the front wheel 33a and the rear wheel 33b all have a convex annular portion 33x. It may be made to have.

In this case, by making the convex annular portion 33x of the front wheel 33a and the rear wheel 33b travel within the second groove portion 30y, the widening portion 12 can be moved in the widening/storage direction in a more stable state. .

Further, as shown in FIGS. 20 and 21, a second groove portion 30y is provided over the entire length of the front guide rail 30a, and while all of the front wheels 33a have a convex annular portion 33x, the second groove portion 30y is provided on the rear guide rail 30b. A flat bar without the second groove portion 30y may be used, and the rear wheel 33b may not be provided with the convex annular portion 33x.

Further, as shown in FIGS. 22 and 23, the second groove portion 30y extends approximately the entire length of the widened floor portion 10 in the front guide rail 30a and the rear guide rail 30b, and a portion of the floor surface 8a of the vehicle body 8 on the widening direction side. May exist only in
In this case, among all the front wheels 33a and rear wheels 33b, the front wheels 33a and rear wheels 33b on the side in the width-expanding direction are wheels having the convex annular portion 33x.

Further, as shown in FIGS. 24 and 25, the second groove portion 30y is provided over the entire length of the front guide rail 30a, and while all of the front wheels 33a have a convex annular portion 33x, the first groove portion 30x has a convex annular portion 33x. , the slide frame 32 main body may not exist at a position that is provided over the entire length of the rear guide rail 30b and corresponds to the rear opening 20, and only the extension portion 32x may be present.

In this case, the synergistic effect of the convex annular portion 33x running within the second groove 30y and the extension portion 32x running within the first groove 30x moves the widening portion 12 in the widening/storage direction in a stable state. can be done.

In this case, the first groove portion 30x is provided over the entire length of the front guide rail 30a, and the extension portion 32x runs within the first groove portion 30x, while the second groove portion 30y is provided along the entire length of the rear guide rail 30b. The main body of the slide frame 32 does not exist at a position that is provided over the entire length and corresponds to the rear opening 20, and all of the rear wheels 33b have a convex annular portion 33x and run within the second groove portion 30y. You can do it like this.

Further, in the above embodiment, as shown in FIGS. 7 to 10, the door opening/closing system 40 using the chain 46 is illustrated, but a door opening/closing system 60 as shown in FIG. 26 may also be used. .

Next, a door opening/closing system 60 for the vertical folding door 20a according to another embodiment will be described. Note that the description of the parts that are the same as those described in the door opening/closing system 40 according to FIGS. 7 to 10 will be omitted. FIG. 26(a) is a view of the door opening/closing system 60 when the vertical folding door 20a is fully closed, viewed from the side of the widened part 12, and FIG. It is a figure seen from.

As shown in FIGS. 26(a) and 26(b), the door opening/closing system 60 includes a vertical folding door 20a consisting of an upper door 42a and a lower door 42b, and a latch receiver disposed on the lower side of the rear opening 20. section 62, a crank section 64, a wire 66, an actuator 68, a guide section 49, and an elevating section 43. Note that a hydraulic cylinder is generally used as the actuator 68. Further, a spring hinge (not shown) is provided between the upper door 42a and the lower door 42b constituting the vertical folding door 20a, which exerts a reaction force to extend the bending of the vertical folding door 20a.

As shown in FIG. 27, the crank portion 64 has a Z-shape when viewed from the side, and as shown in FIGS. It is rotatably fixed. Further, a latch claw 65 that can be raised and lowered by a spring 65b that is closed by a lid 65a is provided at one end 64b, and the other end 64c is connected to the lower end of the wire 66. An actuator 68 is attached to the ceiling panel 14 of the widened section 12 and adjusts the tension of the wire 66.

The crank portion 64 and the latch receiving portion 62 constitute a locking mechanism, and the latch receiving portion 62 is formed at a predetermined position of the guide portion 49. On the other hand, the latch pawl 65 is provided above one end 64b of the crank portion 64, and is locked in a state in which the latch portion 62a of the latch receiving portion 62 is latched when the door is closed.

Next, the behavior of the door opening/closing system 60 will be explained. Here, FIG. 29 is a diagram showing a door open state in which the vertical folding door 20a is opened and an intermediate state between the door open state and the door closed state.

First, when an "open" button (not shown) is operated in a closed state where the vertical folding door 20a is closed, the actuator 68 is driven and the wire 66 is pulled upward.
As a result, the crank part 64 rotates, the tip of the one end part 64b presses the back plate of the latch receiving part 62, the joint between the upper door 42a and the lower door 42b is separated from the guide part 49, and the upper and lower folding doors 20a is bent backward into a dogleg shape. At the same time, the latch claw 65 is disengaged from the locking part 62a of the latch receiving part 62 (see FIG. 28(a)), and the lock is released.

Continuously, due to the tension of the wire 66, the lower door 42b moves upward, and the elevating part 43 rises along the guide part 49, and the bent angle of the "dog" shape of the vertically folding door 20a becomes steeper ( (See FIG. 29), the upper door 42a and the lower door 42b are folded to open the door.
In the door open state, the actuator 68 continues to pull the wire 66 upward, thereby maintaining the door open state.

On the other hand, when the "close" button is operated in the door open state, the door opening/closing system 60 takes a behavior opposite to that described above, and shifts from the door open state to the door closed state. In this case, the vertical folding door 20a gradually transitions to the closed state as the wire 66 is pulled down, and the vertical folding door 20a gradually shifts to the closed state as the elevating section 43 descends along the guide section 49. The door changes from vertical to flat and transitions to the door closed state.

When shifting to the door closed state, as shown in FIG. 28(c), the latch pawl 65 contacts the locking portion 62a and once descends into the crank portion 64, and then as shown in FIG. 28(b), It moves into the latch receiving part 62, rises due to elastic force, and is locked by the locking part 62a. As a result, the vertical folding door 20a is locked in the closed state.

Also with this door opening/closing system 60, by using the vertical folding door 20a, there is no need to provide a threshold at the rear opening 20, and a large frontage can be provided. Therefore, large cargo can be easily loaded and unloaded.

Moreover, since the wire 66 can be continuously pulled upward by the actuator 68 in the door open state, the vertical folding door 20a can be accurately held in the door open state by the holding force of the wire 66.

Further, by providing a spring hinge between the upper door 42a and the lower door 42b, the vertical folding door 20a can be closed without being bent into a dogleg shape.
Further, by providing the vertical folding door 20a with a locking mechanism consisting of the crank portion 64 and the latch receiving portion 62, the vertical folding door 20a can be accurately locked in the closed state. As a result, when the vertical folding door 20a is closed, the vertical folding door 20a is prevented from bending into a dogleg shape due to wind force, etc., and the vertical folding door 20a is accurately maintained in a vertical plane. be able to.

Moreover, the widened vehicle 2 according to the embodiment can be suitably used for a specially equipped vehicle in addition to a freight vehicle.

2 Widened vehicle 4 Driver's seat 6 Cargo compartment 8 Vehicle body 8a Floor surface 10 Widened floor section 11 Loading opening 12 Widened section 14 Ceiling panel 16 Front opening 16a Sliding door 18 Front wall 18a Threshold 20 Rear opening 20a Upper and lower folding doors 22 Rear wall 24 Side wall 30 Guide rail 30a Front guide rail 30b Rear guide rail 30c Middle guide rail 30x First groove portion 30y Second groove portion 32 Slide frame 32a Front portion 32b Rear portion 32x Extension portion (sliding plate)
32c Side part 33 Wheel 33a Front wheel 33b Rear wheel 33c Central wheel 33x Convex annular part 40 Door opening/closing system 42a Upper door 42b Lower door 43 Lifting part 44a Upper sprocket 44b Lower sprocket 46 Chain 48 Drive part 49 Guide part 50 Fixed shaft 52 Engagement part 52a Notch part 60 Door opening/closing system 62 Latch receiving part 62a Locking part 64 Crank part 64a Lower corner part 64b One end part 64c Other end part 65 Latch claw 65a Lid 66 Wire 68 Actuator 102, 102', 102'' Widened parts 104, 104', 104'' Vehicle body 106 Floor parts 108, 108', 108'' Panel 110 Large opening

Claims (2)

In a widened vehicle having a widened part that widens in the width direction of the side surface of the vehicle, a door opening/closing system for a vertical folding door provided at an opening in a rear wall located at the rear of the widened part in the traveling direction ,
a fixed shaft for holding the vertical folding door in a closed state;
an engaging portion rotatably fixed to the lower door of the upper door and the lower door constituting the vertical folding door, and engaging with the fixed shaft in the door closed state;
a chain that spans over an upper sprocket and a lower sprocket and has the engaging portion fixed;
a drive unit that is attached to the ceiling of the widened section and rotates the upper sprocket;
a guide section erected on the side of the opening;
an elevating part that is disposed at the lower end of the lower door and moves up and down along the guide part,
The drive unit is driven and the chain rotates, thereby opening and closing the vertical folding door via the engaging unit while moving the position of the lower sprocket using the upper sprocket as a fulcrum. Door opening/closing system. The engaging portion is formed with a notch inclined downward at a predetermined angle with respect to a perpendicular line;
The fixed shaft slides within the notch when the door is opened and closed;
The door opening/closing system according to claim 1, wherein the notch portion bottoms out on the fixed shaft in the door closed state.