Widened part moving mechanism

Abstract

To provide a cost-saving widened part moving mechanism capable of easily loading and unloading a large-sized cargo.SOLUTION: A widened part moving mechanism comprises: a slide frame that comes into contact with bottom portions of a front wall and a rear wall of a widened part and slides in a widening / retracting direction while the widened part remains placed on the slide frame; and guide rails which communicate with a floor surface of a vehicle body and a surface of a widened floor part in a widened state and on which the slide frame slides. The guide rails include: a front guide rail corresponding to a front portion of the slide frame abutting against the front wall; and a rear guide rail corresponding to a front portion of the slide frame abutting against the rear wall. A body of the rear guide rail is not present at a position of a rear opening.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an widening section moving mechanism that moves a widening section in a widening vehicle in which the side surface of the vehicle body is widened. [Background technology]

[0002] Conventionally, there has been known a widening vehicle equipped with a box-shaped widening section (capsule type) that widens the side of the vehicle body (see, for example, Patent Document 1). In such a widening vehicle, the widening section slides while floating above the floor of the vehicle body, so that heavy objects cannot be loaded on the widening section, and heavy objects must be loaded on the floor of the vehicle body where the widening section is not located.

[0003] For this reason, when loading heavy objects on a widened vehicle, it is possible to provide the widened section 102 only in the front part of the vehicle body, and use the floor section 106 at the rear of the vehicle body 104 for loading heavy objects, for example, as shown in Figure 30(a).

[0004] Here, in this type of widening vehicle, it is also conceivable to extend the widening section 102' over the entire vehicle body 104' as shown in Fig. 30(b). In this case, it is conceivable to design a mechanism that does not provide a floor section in the widening section 102' and deploys the floor section of the widening section 102' in another way so that heavy objects can be loaded on the floor section of the vehicle body 104' in both the stored state in which the widening section 102' is stored and the widened state in which the widening section 102' is widened.

[0005] However, even if this type of widening vehicle were to be realized, a problem would arise in that the panel 108 on the rear of the widening section 102' would hinder loading and unloading, making it impossible to load and unload luggage when the widening section 102' is stowed in its stored state. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2013-032126 A [Patent Document 2] Patent No. 5576996 Summary of the Invention [Problem to be solved by the invention]

[0007] In order to solve the problems described above, it is possible to consider providing a large opening 110 in the rear panel 108', as shown in Figure 31. However, when the widening section 102'' is stored in the stowed state, for example, when loading and unloading a cargo container with casters carrying heavy objects from the rear of the vehicle body 104'', the threshold of the opening would become an obstacle. Furthermore, when a sliding door is provided in the large opening 110, there is a problem that the opening dimensions are insufficient.

[0008] As shown in Patent Document 2, such problems do not occur in widening vehicles in which the widening section can be folded and stored. However, such foldable widening vehicles have the drawback that the floor and walls that make up the widening section must be designed specifically for the widening vehicle, making them expensive.

[0009] An object of the present invention is to provide a cost-saving widening section moving mechanism that can easily load and unload large cargo. [Means for solving the problem]

[0010] According to the widening portion moving mechanism of the present invention, A widening section moving mechanism for moving a widening section in a widening vehicle that widens a side surface of a vehicle body in a width direction, comprising: The widening vehicle includes a widening floor portion that constitutes a side wall of the vehicle body in a stored state in which the widening portion is stored within the vehicle body, and that constitutes a floor portion of the widening portion in a widened state in which the widening portion is widened from within the vehicle body, In a case where the widening portion does not include a floor surface and a side wall on the vehicle body side, but includes a ceiling panel, a front wall having a front opening, a rear wall having a rear opening, and a side wall on the widening direction side, a slide frame that comes into contact with bottoms of the front wall and the rear wall of the widening portion and slides in the widening / storing direction while the widening portion is placed thereon; a guide rail that communicates with the floor surface of the vehicle body and the surface of the widened floor portion in the widened state and along which the slide frame slides; Equipped with The guide rail has: a front guide rail corresponding to a front portion of the slide frame that abuts against the front wall; a rear guide rail corresponding to the rear portion of the slide frame that abuts against the rear wall; Includes: The main body of the slide frame is not present at the rear opening.

[0011] In this way, since the main body of the rear guide rail is not present at the position of the rear opening, there is no step at the rear of the vehicle body, making it easy to load and unload large cargo. In addition, since such a slide frame does not require a special design and can be easily realized, a low-cost widening section movement mechanism can be realized.

[0012] Further, according to the widening portion moving mechanism of the present invention, The front part is provided with a front wheel, The rear portion is provided with rear wheels, The slide frame is characterized in that, when the widening section moves, the slide frame moves while causing the front wheels and the rear wheels to run on the guide rails. This allows cargo to be loaded and unloaded through the rear opening whether the widening section is in a closed state stored within the vehicle body or in an open state where the widening section is widened from the vehicle body.

[0013] Further, according to the widening portion moving mechanism of the present invention, The rear portion of the slide frame includes an extension portion extending downward, The rear guide rail is provided with a first groove portion into which the extension portion fits, The extension portion runs within the first groove portion when the widening portion moves. This allows the widening section to be moved in the widening / storing directions in a stable state.

[0014] Further, according to the widening portion moving mechanism of the present invention, In the rear portion of the slide frame, only the extension portion is present at a position corresponding to the rear opening, The first groove portion is provided over the entire length of the rear guide rail. As a result, both sleeve walls of the rear wall are connected by the rear guide rail, allowing appropriate rigidity to be maintained and a large rear opening to be provided.

[0015] Further, according to the widening portion moving mechanism of the present invention, The slide frame is not present at a position corresponding to the rear opening in the rear portion of the slide frame, The extension portion is present only at the location of the rear wheel on the width-widening direction side, The first groove portion is characterized in that it exists along the entire length of the widening floor portion of the rear guide rail and only along a portion of the floor surface of the vehicle body in the width-widening direction. This allows large cargo to be easily loaded and unloaded, and the widening section can be moved in the widening and storage directions in a stable state.

[0016] Further, according to the widening portion moving mechanism of the present invention, At least one of the front wheels and the rear wheels has a convex annular portion on a rotation side surface thereof, the convex annular portion having a larger diameter than other portions thereof, The guide rail on which the front wheel or the rear wheel provided with the convex annular portion runs is provided with a second groove portion into which the convex annular portion fits, The present invention is characterized in that the convex annular portion runs within the second groove portion when the widening portion moves. In this way, by making the convex annular portion of the wheel run inside the groove, the widening portion can be moved in the widening / storing direction in a more stable state.

[0017] Further, according to the widening portion moving mechanism of the present invention, The convex annular portion is provided on the front wheel, The second groove portion is characterized in that it exists along the entire length of the widening floor portion of the front guide rail and on a part of the width-widening direction side of the floor surface of the vehicle body. This allows the widening section to be moved in the widening / storing directions in a stable state.

[0018] Further, according to the widening portion moving mechanism of the present invention, The convex annular portion is provided on the rear wheel, The second groove portion is characterized in that it exists along the entire length of the widening floor portion of the rear guide rail and on a part of the width-widening direction side of the floor surface of the vehicle body. This allows the widening section to be moved in the widening / storing directions in a stable state.

[0019] Further, according to the widening portion moving mechanism of the present invention, In the rear portion of the slide frame, only an extension portion extending downward is present at a position corresponding to the rear opening, The rear guide rail is provided with a first groove portion into which the extension portion fits, The front wheel is provided with a convex annular portion having a larger diameter than other portions, The front guide rail is provided with a second groove portion into which the protruding annular portion is fitted, When the widening portion moves, the extension portion runs within the first groove portion, and the convex annular portion runs within the second groove portion. In this way, the convex annular portion runs inside the second groove portion, and further the extension portion runs inside the second groove portion, creating a synergistic effect, allowing the widening portion to move in the widening / storing direction in a stable state.

[0020] Further, according to the widening portion moving mechanism of the present invention, the bottom surface of the rear wall is the bottom of both side walls of the rear opening, The bottom surface of the front wall is characterized in that it forms a threshold for the front opening. That is, the widening portion moving mechanism of the present invention can be suitably used under such conditions.

[0021] Further, according to the widening portion moving mechanism of the present invention, The guide rail body is characterized in that it is a flat bar having a plate shape. This makes it possible to realize a low-cost widening portion moving mechanism. Effect of the Invention

[0022] According to the present invention, a cost-saving widening section moving mechanism that can easily load and unload large cargo can be provided. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view of a widening vehicle according to an embodiment, viewed from above. [Diagram 2] 1 is a perspective view showing a state in which a width-widening portion is being widened in a width-widening vehicle according to an embodiment; [Diagram 3] 1 is a perspective view showing a state in which a widening portion is widened in a widening vehicle according to an embodiment of the present invention; FIG. [Figure 4] 13A and 13B are diagrams illustrating a widening section moving mechanism according to the embodiment. [Diagram 5] 13A and 13B are diagrams illustrating a slide frame of the widening portion moving mechanism in the embodiment. [Figure 6] 13 is a diagram showing a state in which the extension portion is fitted into the first groove portion in the widening portion moving mechanism of the embodiment. FIG. [Figure 7] 1 is a diagram showing a door opening and closing system according to an embodiment; [Figure 8] 11A to 11C are diagrams showing the movement transition of an engagement portion of the door opening and closing system according to the embodiment. [Figure 9] 1 is a perspective view showing a state in which an engagement portion engages with a fixed shaft in a door opening and closing system according to an embodiment; [Figure 10]A diagram showing the transition from a door closed state to a door open state of the door opening and closing system of the embodiment. [Figure 11] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 12] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 13] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 14] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 15] 13 is a diagram showing a state in which the convex annular portion is fitted into the second groove portion in the widening portion moving mechanism of another embodiment. FIG. [Figure 16] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 17] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 18] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 19] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 20] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 21] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 22] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Figure 23] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 24] 13A and 13B are diagrams illustrating a widening portion moving mechanism according to another embodiment. [Diagram 25] 13A and 13B are diagrams showing a slide frame of a widening portion moving mechanism according to another embodiment. [Figure 26] FIG. 13 is a diagram showing a door opening and closing system according to another embodiment. [Figure 27]FIG. 11 is a perspective view showing a crank portion of a door opening and closing system according to another embodiment. [Figure 28] 13A and 13B are diagrams showing a latch mechanism of a door opening and closing system according to another embodiment. [Figure 29] 13A and 13B are diagrams showing both the door open state and an intermediate state of a door opening and closing system according to another embodiment. [Diagram 30] FIG. 1 is a conceptual diagram showing a conventional widening vehicle. [Diagram 31] FIG. 13 is a conceptual diagram showing another conventional widening vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A widening section moving mechanism according to an embodiment of the present invention will now be described with reference to the drawings. Fig. 1 is a perspective view of a widening vehicle 2 according to an embodiment as viewed from above. In the following description, "forward" refers to the traveling direction of the width-widening vehicle 2, and "rearward" refers to the opposite side to the traveling direction of the width-widening vehicle 2.

[0025] The widening vehicle 2 has a vehicle body 8 consisting of a driver's seat 4 and a cargo room 6, a widening floor section 10 (described later) on the side of the cargo room 6, and a loading opening 11 for loading and unloading cargo at the rear of the cargo room 6 of the vehicle body 8. Note that Fig. 1 shows a stored state in which the widening section 12 is stored inside the vehicle body 8.

[0026] Here, when in the stored state, the widening floor section 10 forms the side wall of the vehicle body 8 as shown in Figure 1, and when the widening section 12 is widened from within the vehicle body 8 as shown in Figures 2 and 3, it opens around the bottom as an axis and forms the floor section of the widening section 12.

[0027] Here, the widening section 12 has a box-like shape without its own floor section, 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 wall 24 on the width-widening direction side. That is, the width-widening vehicle 2 according to the embodiment includes a box-shaped (capsule-shaped) widening section 12 that widens in the width direction of the side surface of the vehicle body 8.

[0028] 4, a threshold 18a is disposed 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 manner, it becomes possible to move between the driver's seat 4 and the cargo compartment 6 in the stowed state.

[0029] The rear wall 22 is a Π-shaped sleeve wall with no bottom, and the rear opening 20 is provided with vertical folding doors 20a that bend forward in an "L" shape, and a drive unit 48 that opens and closes the vertical folding doors 20a is provided above the rear wall 22 of the widening portion 12. The opening and closing operation of the vertical folding doors 20a by the drive unit 48 will be described later.

[0030] The widening portion 12 is placed on a slide frame 32 shown in FIG. 5. The slide frame 32 has a front portion 32a that abuts against the threshold 18a of the front wall 18, a rear portion 32b that abuts against the bottom of the rear wall 22, and a side portion 32c that connects the front portion 32a and the rear portion 32b on the widening direction side, and has a U-shape. Note that a front wheel 33a is provided at the end of the front portion 32a in the widening storage direction, a rear wheel 33b is provided at the end of the rear wall 22 in the widening storage direction, and a central wheel 33c is provided at the center of the side portion 32c. Note that the front wheels 33a, rear wheels 33b, and central wheels 33c are simply referred to as wheels 33 when collectively referring to them.

[0031] On the other hand, on the floor surface 8a of the vehicle body 8 and the surface of the widening floor portion 10 in the widened state, a guide rail 30 along which the slide frame 32 slides is arranged so as to communicate with the floor surface 8a of the vehicle body 8 and the widening floor portion 10.

[0032] The guide rail 30 includes a front guide rail 30a along which the front wheels 33a run, a rear guide rail 30b along which the rear wheels 33b run, and a middle guide rail 30c along which the central wheel 33c runs. The front guide rail 30a is located at a position corresponding to the front portion 32a of the slide frame 32 that abuts against the front wall 18, and the rear guide rail 30b is located at a position corresponding to the rear portion 32b of the slide frame 32 that abuts against the rear wall 22.

[0033] Here, the front guide rail 30a and the rear guide rail 30b are arranged over approximately the entire width of the floor surface 8a of the vehicle body 8 and the widening floor portion 10 in the widening state. The middle guide rail 30c is arranged over approximately the entire width of the surface of the widening floor portion 10, and a portion of it is arranged on the widening direction side of the floor surface 8a of the vehicle body 8. In other words, the front guide rail 30a, the middle guide rail 30c, and the rear guide rail 30b are all connected to the floor surface 8a of the vehicle body 8 and the widening floor portion 10. As a result, when the widening portion 12 is widened or retracted, the slide frame 32 slides on the guide rails 30 with the widening portion 12 placed thereon.

[0034] Fig. 6(a) is a diagram showing a state in which the front wheel 33a abuts on the front guide rail 30a. As shown in Fig. 6(a), the front guide rail 30a has a flat bar shape, and the front wheel 33a journaled on the slide frame 32 runs on the guide rail 30. Although not shown, the state in which the central wheel 33c abuts on the middle guide rail 30c is similar to that shown in Fig. 6(a).

[0035] Fig. 6(b) is a diagram showing a state in which the rear wheel 33b abuts on the rear guide rail 30b. As shown in Fig. 6(b), an extension part 32x (sliding plate) is provided below the rear wheel 33b at a position where the rear wheel 33b is located on the rear part 32b.

[0036] The rear guide rail 30b is made of a bent material having a hat-shaped cross section, and a first groove portion 30x into which the extension portion 32x fits is formed in a gap defined by the hat portion.

[0037] 5, the main body of the rear portion 32b of the slide frame 32 exists only at the position where the rear wheel 33b is located, and the slide frame 32 main body does not exist at the position corresponding to the rear opening 20, and only the extension portion 32x exists. 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.

[0038] Next, the door opening / closing system 40 for the vertical folding door 20a according to the embodiment will be described. Fig. 7(a) is a diagram of the door opening / closing system 40 when the vertical folding door 20a is fully closed, as viewed from the side of the widening section 12, and Fig. 7(b) is a diagram of the door opening / closing system 40 when the vertical folding door 20a is fully closed, as viewed from the inside of the widening section 12.

[0039] As shown in Figures 7(a) and (b), the door opening / closing system 40 includes an upper and lower folding door 20a consisting of an upper door 42a and a lower door 42b, a chain 46 that meshes with an upper sprocket 44a and a lower sprocket 44b, a drive unit 48 that drives the chain 46, a guide unit 49, a fixed shaft 50, and an engagement unit 52.

[0040] As shown in FIGS. 8(a) to 8(c), the engaging portion 52 is formed with a downwardly extending cutout portion 52a whose center line P is inclined at a predetermined angle with respect to the perpendicular line. Fig. 9 is a perspective view showing a state in which the engagement portion 52 is engaged with the fixed shaft 50 in the door closed state in which the vertical folding doors 20a are closed. As shown in Fig. 9, the fixed shaft 50 is fixed to the inside of the side wall 24 of the widening portion 12, and the engagement portion 52 is rotatably fixed to the lower door 42b. In this manner, the engagement portion 52 is engaged with the fixed shaft 50 in the door closed state, so that the vertical folding doors 20a are held in the door closed state.

[0041] The chain 46 is stretched over the upper sprocket 44a and the lower sprocket 44b, and an engagement portion 52 is fixed. The drive unit 48 is attached to the ceiling panel 14 of the widening section 12, and the upper sprocket 44a is fixed to a rotating shaft (not shown). That is, the upper sprocket 44a rotates when the drive unit 48 is driven. A motor is generally used for the drive unit 48.

[0042] 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. In addition, a lifting portion 43 is provided at the lower end of the lower door 42b, which is disposed in the groove of the guide portion 49 and moves up and down along the guide portion 49. A bearing is generally used for the lifting portion 43. This allows the vertical folding door 20a to be opened and closed without moving away from the rear opening 20.

[0043] Next, the behavior of the door opening / closing system 40 will be described. Here, Fig. 10(a) is a diagram showing a door closed state where the vertical folding door 20a is closed, Fig. 10(b) is a door intermediate state where the vertical folding door 20a is intermediate between the door open state and the door closed state, and Fig. 10(c) is a diagram showing a door open state where the vertical folding door 20a is opened.

[0044] First, when the "open" button (not shown) is operated in the door closed state where the vertical folding door 20a is closed, the drive unit 48 rotates the chain 46 via the upper sprocket 44a in the door opening direction (see FIG. 8(a)).

[0045] 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, the engaging portion 52 moves while the inclined notch 52a slides on the fixed shaft 50, so that the engaging portion 52 is pushed out toward the front side of the widening portion 12 by the fixed shaft 50, as shown in Fig. 8(a). As a result, the lower sprocket 44b moves in a direction away from the guide portion 49, with the upper sprocket 44a as a fulcrum.

[0046] In addition, the fixed shaft 50 slides the notch 52a, and the engaging portion 52 is pulled up diagonally upward, so that the lower door 42b rotatably fixed to the engaging portion 52 is also pulled up diagonally upward in conjunction with this, and the vertical folding door 20a is bent forward into a "L" shape. At the same time, the lifting portion 43 rises along the guide portion 49. As a result, the vertical folding doors 20a transition from the door closed state to the door intermediate state (see FIG. 10(b)).

[0047] Furthermore, the engaging portion 52 is pulled upward and the lower sprocket 44b moves away from the guide portion 49, whereby 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 when the door is in the open state, the door opening / closing system 40 behaves in the opposite manner to that described above, transitioning from the door open state to the door intermediate state and then to the door closed state.

[0048] 8(b) and (c) are diagrams showing a state in which the door moves from the intermediate door state to the closed door state. As shown in Fig. 8(b), when the door moves from the intermediate door state to the closed door state, the engagement part 52 moves while the inclined cutout part 52a slides on the fixed shaft 50, so that the engagement part 52 is guided to the rear side of the widening part 12 by the fixed shaft 50. As a result, the lower sprocket 44b moves in a direction approaching the guide portion 49 with the upper sprocket 44a as a fulcrum.

[0049] In addition, as the fixed shaft 50 slides along the cutout portion 52a and the engagement portion 52 is pulled diagonally downward, the lower door 42b, which is rotatably fixed to the engagement portion 52, is also pulled diagonally downward in conjunction with this, and the lifting portion 43 descends along the guide portion 49.

[0050] In this way, the upper and lower folding door 20a, which had been bent into an "L" shape, closes and fits onto the same plane as shown in Figure 8(c), the cutout portion 52a hits the fixed shaft 50, and the engagement portion 52 engages with the fixed shaft 50, transitioning to a locked door closed state.

[0051] According to the invention related to this embodiment, since the main body of the slide frame 32 is not present 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. In addition, since the slide frame 32 does not require a special design and can be easily realized, a low-cost widening section movement mechanism can be realized.

[0052] Furthermore, even if the rear wall 22 of the widening portion 12 is a Π-shaped sleeve wall without a bottom, both sleeve portions of the sleeve wall are connected by the extension portion 32x, so that appropriate rigidity can be maintained and a large rear opening 20 can be provided.

[0053] In addition, since the widening section 12 moves while running on the guide rails 30, cargo can be loaded and unloaded through the rear opening 20 whether the widening section 12 is in a stored state stored within the vehicle body 8 or in an expanded state where the widening section 12 is expanded from the vehicle body 8.

[0054] Furthermore, since the widening portion 12 slides while the extension portions 32x are fitted in the first groove portions 30x, the widening portion 12 can be moved in the widening / storing direction in a stable state. In addition, according to the door opening / closing system 40 of the embodiment, by using the vertical folding door 20a, it is not necessary to provide a threshold at the rear opening 20, and the opening can be made large. Therefore, large cargo can be easily loaded and unloaded.

[0055] In addition, since the vertical folding door 20a is opened and closed by rotating the chain 46, the vertical folding door 20a can be closed smoothly without being suddenly closed by its own weight when transitioning from the door open state to the door closed state. Furthermore, by engaging the engaging portion 52 with the fixed shaft 50, the vertical folding door 20a can be locked accurately in the door closed state.

[0056] In the above embodiment, as shown in Figs. 4 and 5, the extension portion 32x and the first groove portion 30x at the rear of the vehicle body are arranged over approximately the entire width of the floor surface 8a of the vehicle body 8 and the widening floor portion 10, respectively. However, as shown in Figs. 11 and 12, the first groove portion 30x may be present only over approximately the entire length of the widening floor portion 10 in the rear guide rail 30b and only a part of the widening direction side of the floor surface 8a of the vehicle body 8. In this case, too, the slide frame 32 body is not present at a position corresponding to the rear opening 20, and the rear portion 32b is present only at the location of the rear wheel 33b. Moreover, the extension portion 32x is present only on the widening direction side of the rear portion 32b of the slide frame 32.

[0057] Even in this case, there is no step at the rear of the vehicle body, making it easy to load and unload large cargo. In addition, since the widening portion 12 slides while the extension portion 32x is fitted into the first groove portion 30x, the widening portion 12 can be moved in the widening / storing direction in a stable state.

[0058] 13 and 14, in the above-mentioned embodiment, the extension portion 32x and the first groove portion 30x may not be provided, and the rear portion 32b of the slide frame 32 may be located only at the location of the rear wheel 33b. Even in this case, the slide frame 32 body is not present at a position corresponding to the rear opening 20, so there is no step at the rear of the vehicle body, and large cargo can be easily loaded and unloaded.

[0059] In the above-described embodiment, as shown in FIG. 15(a), the rotating side surface of the wheel 33 of the slide frame 32 may be provided with a convex annular portion 33x having a larger diameter than other portions.

[0060] 15(b) is a diagram showing a state in which a wheel 33 provided with a convex annular portion 33x abuts on a guide rail 30. As shown in FIG. 15(b), in the guide rail 30, the rotating side surface of the wheel 33 not including the convex annular portion 33x abuts on the main body of the guide rail 30.

[0061] In addition, a folded material having a hat-shaped cross section is used for the guide rail 30 with which the wheel 33 provided with the convex annular portion 33x abuts. A second groove portion 30y into which the convex annular portion 33x fits is formed in a gap forming the hat portion of the guide rail 30, and the convex annular portion 33x runs inside the second groove portion 30y when the widening portion 12 moves.

[0062] Hereinafter, in the above-mentioned embodiment, a type of widening portion moving mechanism in which the convex annular portion 33x runs inside the second groove portion 30y when the widening portion 12 moves will be described. For example, as shown in Figures 16 and 17, the slide frame 32 may not be present at a position corresponding to the rear opening 20, and the second groove portion 30y may be provided over the entire length of the front guide rail 30a, and may be present only over approximately the entire length of the widening floor portion 10 in the rear guide rail 30b and on only a portion of the widening direction side of the floor surface 8a of the vehicle body 8.

[0063] In this case, of all the front wheels 33a and rear wheels 33b, only the rear wheel 33b on the vehicle body 8 side is a wheel that does not have a convex annular portion 33x. In this way, by making the convex annular portion 33x of the front wheel 33a run inside the second groove portion 30y, the widening portion 12 can be moved in the widening / storing direction in a more stable state.

[0064] Also, as shown in Figures 18 and 19, the second groove portion 30y may be provided over the entire length of the front guide rail 30a and the rear guide rail 30b, and all of the front wheels 33a and rear wheels 33b may have the convex annular portion 33x.

[0065] In this case, by making the convex annular portions 33x of the front wheels 33a and the rear wheels 33b run within the second groove portions 30y, the widening portion 12 can be moved in the widening / storing direction in a more stable state.

[0066] Also, as shown in Figures 20 and 21, the second groove portion 30y may be provided over the entire length of the front guide rail 30a, and all of the front wheels 33a may have a convex annular portion 33x, while the rear guide rail 30b may use a flat bar without the second groove portion 30y, and the rear wheels 33b may not be provided with a convex annular portion 33x.

[0067] 22 and 23, the second groove portion 30y may be present over approximately the entire length of the widened floor portion 10 in the front guide rail 30a and the rear guide rail 30b, and only on a portion of the floor surface 8a of the vehicle body 8 in the width widening direction. In this case, of all the front wheels 33a and rear wheels 33b, the front wheels 33a and rear wheels 33b on the width-widening direction side are wheels having the convex annular portions 33x.

[0068] Also, as shown in Figures 24 and 25, the second groove portion 30y may be provided over the entire length of the front guide rail 30a, and all of the front wheels 33a may have convex annular portions 33x, while the first groove portion 30x may be provided over the entire length of the rear guide rail 30b, and at the position corresponding to the rear opening 20, the slide frame 32 main body may not be present, and only the extension portion 32x may be present.

[0069] In this case, the convex annular portion 33x runs within the second groove portion 30y, and further the extension portion 32x runs within the first groove portion 30x, resulting in a synergistic effect, allowing the widening portion 12 to move in the widening / storing direction in a stable state.

[0070] In this case, the first groove portion 30x may be provided over the entire length of the front guide rail 30a, with the extension portion 32x running within the first groove portion 30x, while the second groove portion 30y may be provided over the entire length of the rear guide rail 30b, with the slide frame 32 body not present at a position corresponding to the rear opening 20, and all of the rear wheels 33b having convex annular portions 33x and running within the second groove portion 30y.

[0071] In the above embodiment, the door opening / closing system 40 using the chain 46 as shown in Figs. 7 to 10 is exemplified, but a door opening / closing system 60 as shown in Fig. 26 may also be used.

[0072] 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 same parts 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, seen from the side of the widening section 12, and Fig. 26(b) is a view of the same seen from the room side of the widening section 12.

[0073] 26(a) and 26(b), the door opening / closing system 60 includes the vertical folding door 20a consisting of the upper door 42a and the lower door 42b, a latch receiving portion 62 arranged on the lower side of the rear opening 20, a crank portion 64, a wire 66, an actuator 68, a guide portion 49, and a lifting portion 43. A hydraulic cylinder is generally used for the actuator 68. A spring hinge (not shown) is provided between the upper door 42a and the lower door 42b constituting the vertical folding door 20a to apply a reaction force to straighten the bending of the vertical folding door 20a.

[0074] The crank portion 64 has a Z-shape when viewed from the side as shown in Fig. 27, and its lower corner 64a is rotatably fixed to the lower door 42b as shown in Figs. 28(a) to (c). A latch claw 65 that can be raised and lowered by a spring 65b covered with a lid 65a is provided at one end 64b, and the other end 64c is connected to the lower end of a wire 66. An actuator 68 is attached to the ceiling panel 14 of the widening portion 12, and adjusts the tension of the wire 66.

[0075] 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 claw 65 is provided above one end portion 64b of the crank portion 64, and is locked in a state where it is engaged with an engaging portion 62a of the latch receiving portion 62 when the door is in the closed state.

[0076] Next, a description will be given of the behavior of the door opening and closing system 60. Here, Fig. 29 is a diagram showing both a door open state in which the vertical folding door 20a is open, and an intermediate state between the door open state and the door closed state.

[0077] First, when an "open" button (not shown) is operated in a door closed state where the vertical folding door 20a is closed, the actuator 68 is driven to pull the wire 66 upward. As a result, the crank portion 64 rotates, and the tip of the one end portion 64b presses the back plate of the latch receiving portion 62, the joint between the upper door 42a and the lower door 42b moves away from the guide portion 49, and the vertical folding door 20a bends backward in an "L" shape. At the same time, the latch claw 65 disengages from the engagement portion 62a of the latch receiving portion 62 (see FIG. 28(a)), and the lock is released.

[0078] Next, due to the tension of the wire 66, the lower door 42b moves upward, and the lifting section 43 rises along the guide section 49, causing the bent angle of the "L" shape of the upper and lower folding doors 20a to become steeper (see Figure 29), and the upper door 42a and the lower door 42b transition to a folded door open state. In the door open state, the wire 66 is continuously pulled upward by the actuator 68, thereby maintaining the door open state.

[0079] On the other hand, when the "close" button is operated in the door open state, the door opening / closing system 60 behaves in the opposite manner to that described above, and transitions from the door open state to the door closed state. In this case, the vertical folding door 20a gradually transitions to the door closed state by pulling down the wire 66, and the vertical folding door 20a gradually changes from the "L" shape to a flat vertical shape as the lifting part 43 descends along the guide part 49, transitioning to the door closed state.

[0080] When the door is closed, as shown in Fig. 28(c), the latch claw 65 abuts against the locking portion 62a and descends into the crank portion 64, and then, as shown in Fig. 28(b), moves into the latch receiving portion 62 and rises due to elastic force to be locked by the locking portion 62a. This locks the vertical folding door 20a in the door closed state.

[0081] This door opening / closing system 60 also uses the vertical folding door 20a, eliminating the need to provide a threshold at the rear opening 20 and allowing for a large opening. This makes it easy to load and unload large cargo.

[0082] Furthermore, in the door open state, the wire 66 can be continuously pulled upward by the actuator 68, so that the holding force of the wire 66 can accurately hold the vertical folding door 20a in the door open state.

[0083] Furthermore, by providing a spring hinge between the upper door 42a and the lower door 42b, the vertical folding door 20a can be closed without bending in an "L" shape. Furthermore, 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 door closed state. This prevents the vertical folding door 20a from bending into an "L" shape due to wind force or the like when the vertical folding door 20a is closed, and accurately maintains the vertical folding door 20a in a flat state.

[0084] Moreover, the widened vehicle 2 according to the embodiment can be suitably used for special purpose vehicles in addition to freight vehicles. [Explanation of symbols]

[0085] 2 Widening vehicles 4 Driver's seat 6 cargo hold 8 Vehicle body 8a Floor 10 Widening floor section 11 Loading opening 12 Widening section 14 Ceiling Panel 16 Front opening 16a Sliding door 18 Front Wall 18a Threshold 20 Rear opening 20a Up and down folding door 22 Back wall 24 Side wall 30 Guide rail 30a Front guide rail 30b Rear guide rail 30c middle guide rail 30x First groove 30y 2nd groove 32 Slide Frame 32a Anterior part 32b Posterior part 32x extension (sliding plate) 32c Lateral part 33 wheels 33a front wheel 33b Rear wheel 33c central wheel 33x Convex annular section 40 Door opening and closing system 42a Upper door 42b Lower door 43 Lifting section 44a upper sprocket 44b lower sprocket 46 Chain 48 Drive unit 49 Guide part 50 Fixed axis 52 Engagement part 52a Notch 60 Door Opening and Closing System 62 Latch receiving part 62a Locking portion 64 Crank section 64a Lower corner 64b One end 64c Other end 65 Latch Claw 65a lid 66 Wire 68 Actuator 102, 102´, 102´´ Widened section 104, 104´, 104´´ Vehicle body 106 Floor section 108, 108´, 108´´ Panel 110 Large Opening

Claims

1. A widening section moving mechanism for moving a widening section in a widening vehicle that widens a side surface of a vehicle body in a width direction, comprising: The widening vehicle includes a widening floor portion that constitutes a side wall of the vehicle body in a stored state in which the widening portion is stored within the vehicle body, and that constitutes a floor portion of the widening portion in a widened state in which the widening portion is widened from within the vehicle body, In a case where the widening portion does not include a floor surface and a side wall on the vehicle body side, but includes a ceiling panel, a front wall having a front opening, a rear wall having a rear opening, and a side wall on the widening direction side, a slide frame that abuts against bottoms of the front wall and the rear wall of the widening portion and slides in a width-widening / storage direction while the widening portion is placed thereon; a guide rail that communicates with the floor surface of the vehicle body and the surface of the widened floor portion in the widened state and along which the slide frame slides; Equipped with The guide rail has: a front guide rail corresponding to a front portion of the slide frame that abuts against the front wall; a rear guide rail corresponding to the rear portion of the slide frame that abuts against the rear wall; Includes: The widening section moving mechanism is characterized in that the main body of the slide frame is not present at the position of the rear opening.

2. The front part is provided with a front wheel, The rear portion is provided with rear wheels, 2. The widening section movement mechanism according to claim 1, wherein the slide frame moves while causing the front wheels and the rear wheels to run on the guide rails when the widening section moves.

3. The rear portion of the slide frame includes an extension portion extending downward, The rear guide rail is provided with a first groove portion into which the extension portion fits, 3. The widening portion movement mechanism according to claim 2, wherein the extension portion runs within the first groove portion when the widening portion moves.

4. In the rear portion of the slide frame, only the extension portion is present at a position corresponding to the rear opening, The widening portion movement mechanism according to claim 3 , wherein the first groove portion is provided over the entire length of the rear guide rail.

5. The slide frame is not present at a position corresponding to the rear opening in the rear portion of the slide frame, The extension portion is present only at the location of the rear wheel on the width-widening direction side, The widening section movement mechanism according to claim 3, characterized in that the first groove portion exists only along the entire length of the widening floor portion of the rear guide rail and only along a portion of the floor surface of the vehicle body in the width-widening direction.

6. At least one of the front wheels and the rear wheels has a convex annular portion on a rotation side surface thereof, the convex annular portion having a larger diameter than other portions thereof, The guide rail on which the front wheel or the rear wheel provided with the convex annular portion runs is provided with a second groove portion into which the convex annular portion fits, 3. The widening portion movement mechanism according to claim 2, wherein the convex annular portion runs within the second groove portion when the widening portion moves.

7. The convex annular portion is provided on the front wheel, The widening section movement mechanism according to claim 6, characterized in that the second groove portion exists over the entire length of the widening floor portion of the front guide rail and on a part of the width-widening direction side of the floor surface of the vehicle body.

8. The convex annular portion is provided on the rear wheel, The widening section movement mechanism according to claim 6, characterized in that the second groove portion exists over the entire length of the widening floor portion of the rear guide rail and on a part of the width-widening direction side of the floor surface of the vehicle body.

9. In the rear portion of the slide frame, only an extension portion extending downward is present at a position corresponding to the rear opening, The rear guide rail is provided with a first groove portion into which the extension portion fits, The front wheel is provided with a convex annular portion having a larger diameter than other portions, The front guide rail is provided with a second groove portion into which the protruding annular portion is fitted, 3. The widening portion movement mechanism according to claim 2, wherein when the widening portion moves, the extension portion runs within the first groove portion, and the convex annular portion runs within the second groove portion.

10. the bottom surface of the rear wall is the bottom of both side walls of the rear opening, 2. The mechanism for moving the widening section according to claim 1, wherein the bottom surface of the front wall is a threshold for the front opening.

11. 2. The mechanism for moving the widening portion according to claim 1, wherein the guide rail body is a flat bar.

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