JPH084390Y2 - Box container door device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped container door which is fixedly mounted on a vehicle for physical distribution, which is generally called a truck, or detachably mounted as a luggage storage chamber. Regarding the device.

[0002]

2. Description of the Related Art As a door device of this type that has been conventionally used, there are devices called a double door type, a folding type (folding type), a shutter type and the like. These are classified according to how the door is opened, but the principle structure thereof is well known to those skilled in the art. Briefly, therefore, the double door type is composed of a pair of left and right door bodies, and the central mating surfaces are respectively swung toward the field toward the front to open largely to the left and right.

On the other hand, in the folding type, by pulling vertically the upper and lower edges of the door body along the side edges of the container opening toward the upper edge, the middle portion in the height direction is bent outward, and from the side. As you can see, the "doglegged" shape gradually collapses as the lower edge is pulled up, and finally the door pieces below the middle part overlap in parallel along the lower surface of the door piece above the middle part. Open with.

The last shutter type is composed of a plurality of narrow door pieces connected in the height direction by a hinge, and when the lower edge is pulled up vertically, the door pieces are oriented approximately 90 ° in order from the top door piece. While changing, go into the groove formed on the lower surface of the ceiling and open it.

[0005]

[Problems to be Solved by the Invention] However, first, in the case of the above-mentioned double door structure, the door has to be wide open to the left and right, so a large open space larger than the lateral width of the vehicle is required, and it cannot be opened in a narrow place. When opened, it had the drawback of obstructing the passage of other vehicles and people. Further, as this type of door device, a lock mechanism or the like for maintaining the closed state is required when the container opening is closed,
This is not the case, and it may actually be disengaged due to mishanging or the like, and even if there is a locking device manually operated by the operator from outside the door device in addition to the lock mechanism, it is disengaged. Or, if for some reason it comes off while driving, the doors will open wide and the luggage will be scattered, not only damaging the luggage but causing serious danger to other traffic, but also the rear view from the side mirror for myself. Being refused, it becomes quite dangerous. The running balance will also be greatly disrupted. In addition, when loading and unloading cargo directly on the cargo entry line or on the platform of the warehouse, if there is some level difference and the lower edge of the door is lower, attach it directly and then open the door. Since it is not possible to do so, the vehicle must be retracted after opening the door in advance. Therefore, even in this case, the rear view cannot be secured by the side mirrors. It is also weak against load collapse, and if the load collapses toward the door in the cargo compartment (inside the container), they will collapse as soon as the door is opened.

On the other hand, in the case of the foldable type, upper and lower door pieces each having a size approximately equal to half the height of the container opening are finally moved up and down with the intermediate portion, which is the axially attached portion, as a boundary. Due to the fold-over, the intermediate portion largely projects outward during the opening process. Therefore, for the worker, the middle portion comes close to his / her face, and the workability is considerably deteriorated. Further, in the conventional folding type, as described above, since the upper and lower door pieces have a large dimension in the height direction, when the middle part folds outward at the beginning of opening to form a large dogleg, If a load falls into the space with the shape of “”, the lower door piece will no longer be raised and the door will not open anymore.

On the other hand, in the case of the shutter type, a space for accommodating the door piece is indispensable along the inner surface of the ceiling, and this requires a considerably large capacity, so that the capacity of the luggage compartment surely becomes small. However, the shutter winding mechanism is inconvenient in terms of complexity and weight. He was not a strong person even when the load collapsed, he could easily get caught, and because there were many door pieces, there was a problem of rattling of them, and it was difficult to maintain the watertightness of the luggage compartment.

In contrast to such a conventional basic door structure,
Several structures have been proposed, each with some modifications, but even so, there have been no door devices with a rational structure that can be called the definitive version. I couldn't see it.

In view of such a conventional situation, the present invention solves or alleviates the above-mentioned drawbacks of the conventional device as a door device for a box-shaped container, and in terms of safety, workability, and function. However, it is intended to provide a better door device.

[0010]

In order to achieve the above object, the present invention provides a door device for selectively opening and closing an opening portion of a box-shaped container. First, door bodies that cover the opening portion are adjacent to each other in the height direction. It consists of an upper door and a lower door. On top of that, the upper door will have a structure conforming to the folding type. That is,
The upper door is composed of two door pieces arranged side by side in the height direction, and these two door pieces are axially attached along their adjacent edges so that they can be folded over each other, while the upper door piece is , Is pivotally attached to the container housing portion in the vicinity of the upper edge so as to be rotatable about an axis parallel to the upper edge, and the lower door piece is rotatable about an axis parallel to the lower edge. Thus, the support member is pivotally mounted, and the support member is guided by a guide mechanism so as to be vertically movable along the side edge of the container opening.

On the other hand, the lower door is pivotally attached to the support member so that the entire lower door can be rotated around an axis parallel to the upper edge of the lower door. Therefore, the lower door can be opened by pulling the lower edge forward and pulling it diagonally upward by rotating the entire lower door around an axis parallel to the upper edge of the lower door. Since it is a "limb-raising type" door body and its upper edge is pivotally attached to the support member as described above, even if the door is opened or before it is opened, the entire door is folded and opened. Can move vertically. In addition, in this document, "to be pivotally attached to a support member" means
It is an expression that includes both the case where the shaft is directly attached and the case where the shaft is attached indirectly. For example, the lower door may be directly attached to the support member through a hinge or a shaft attachment member such as a simple engagement of a pin and a hole in the vicinity of the upper edge of the lower door. Alternatively, the lower door may be connected to the lower edge of the upper door by a hinge or the like. However, the lower edge of the upper door may be indirectly pivotally attached to the support member by being pivotally attached to the support member. It suffices that the other shaft-attached portions and fixed portions substantially satisfy such functions, and it does not matter whether they are direct or indirect.

Further, in the present invention, in addition to the above construction, the load receiving device connected to the above supporting member for receiving the weight of the upper door including the weight of the lower door and assisting the opening and closing operations. In addition, a spring device is also provided to help lock the lower door in a closed state and assist the opening operation. The latter spring device has one end pivotally attached to the lower door and the other end pivotally attached to the support member described above.
Further, when the lower door is in the closed state and closes the container opening, the lower door is attached so as to exert a force to pull the lower door inward of the container. In other words, since the lower door is opened from the closed state, when the lower edge of the lower door starts to be pulled forward slightly obliquely upward, there is resistance until the spring device initially contracts to maximize the spring force. However, when the pulling is performed against the maximum spring force, the spring device is attached so that the spring force acts in the opposite direction to assist in raising and lowering the lower door. Therefore, of course, when closing the lower door, it takes a force to push down the lower edge of the lower door to a position where the spring force exerts the maximum spring force. When it goes over, the lower door is suddenly pressed against the opening side of the housing, and thereafter, the spring device functions to maintain the closed state of the lower door.

However, in the above structure, the upper door is composed of the upper door piece and the lower door piece. However, in the present invention, the upper door is generally an even number of four or more doors. It is also possible to make a folding structure by connecting pieces. In general, if the number of sheets is four or more, if n is a positive integer of 2 or more, the uppermost first door piece to the lowermost 2nth door piece are adjacent to each other. The first door piece is pivotally attached to the container housing part in the vicinity of the upper edge so that the first door piece can pivot around an axis parallel to the upper edge, and the 2nth door piece is After being pivotally attached to the above-mentioned supporting member so as to be rotatable about an axis parallel to the lower edge thereof, i is all positive integers of 2 or more and n or less, and the (2i-2) th door piece The guide mechanism also pivotally mounts the (2i-1) th door piece and the (2i-1) th door piece to the guided member that is vertically movable along the side edge of the container opening. The guide mechanism may be integral with the guide mechanism described above, or may be separately provided in parallel.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a schematic view which allows the user to intuitively understand the opening / closing operation of a door device constructed according to the present invention, and FIG. 2 shows it in a fully closed state. It is shown. On the other hand, FIG. 3 is a longitudinal sectional view in the fully closed state corresponding to the state of FIG. 2, FIG. 4 corresponds to the half open state of FIG. 1 (A), and FIG. 5 corresponds to the fully open state of FIG. 1 (B). FIG. In this embodiment, a box-shaped container fixedly mounted on a truck is assumed, and in particular, an example in which the present invention is applied to a tail gate (rear door) thereof is shown. This is not a limitation, and the present invention can be equally applied to a box-shaped container used for a physical distribution system, as a door device for an opening portion for loading and unloading of the package.

1 to 5 show a rear portion of a box-shaped container housing 10, and an opening / closing portion 11 for loading and unloading a luggage has a large opening on the rear surface of the container housing 10. The door device of the illustrated embodiment constructed in accordance with the present invention has this opening portion.
Although 11 is selectively opened and closed, as the door body,
It has an upper door 20 and a lower door 30. Although not limited, in the present embodiment, all the dimensions of the upper door 20 and the lower door 30 are almost equal, in other words, the dimensions in the lateral direction are almost the same, and the dimension in the height direction of the upper door 20 is the same as that in the lower direction. The doors 30 are also substantially equal to each other, and each is about half the opening height of the container opening portion 11.

The upper door 20 is further arranged side by side in the height direction,
Two door pieces 21, 22 whose height dimensions are almost equal to each other
The door pieces 21 and 22 are assembled so that they can be opened and closed in the same manner as the folding type described above. That is, first, the upper edge of the upper door piece 21 of the upper door 20 is pivotally attached to the container housing 10 so as to be rotatable around an axis parallel to the upper edge near the upper edge. The shaft mounting members for this purpose are three hinges provided at equal intervals in the lateral direction in the illustrated embodiment.
13, ... As is apparent, the above-mentioned "axis" may be geometrical or virtual in nature, and is not limited to an actually shaped member. For example, when the hinge 13 is used as described above, the hinge rotation shaft provided as a concrete shaped member in the hinge happens to rotate in parallel with the upper edge of the upper door piece 21 described above. It may coincide with the axis, but it may not be the case depending on the shaft mounting member used. This concept is equally applicable to the pivoting axes of the door pieces 21 and 22 and the lower door 30, which will be described below, as well as during the construction of the present invention.

Next, with respect to the lower edge of the upper door piece 21, the lower door piece is
The upper edges of 22 are closely and parallel to each other, but these adjacent edges are also pivotally attached to each other by a pivoting member so as to be rotatable with respect to each other. In the case of the illustrated embodiment, this pivot member is also three hinges 23, ... In this case equidistantly arranged laterally, as best seen in FIGS. .

On the other hand, in the illustrated embodiment, the lower edge of the lower door piece 22 of the upper door 20 is a plate that is elongated vertically and has a certain strength as shown in FIGS. In this case, the support member 40 in the shape of a ring is pivotally mounted near the upper end portion in this case. In this embodiment, the shaft-attaching member of this portion is composed of the following element groups.

First, as will be described later, in this embodiment, since there are a pair of support members 40 facing each other in the lateral direction, a tongue piece extending rearward from the container housing in a substantially horizontal direction is provided near the upper end of each of them. 24, 24 are provided. These tongues
The tips of 24 and 24 are processed into a cylindrical shape, and the respective ends of the reinforcing rods 25 extending in the lateral direction are inserted and fixed therein. Further, in this embodiment, three hinges 26, ..., Which are provided at equal intervals in the lateral direction are fitted to the reinforcing rod 25 so that the reinforcing rod 25 serves as the axis of rotation. , Each of the hinges 26, ... Is fixed to the lower edge of the lower door piece 22 in the vicinity of the lower edge of the lower door piece 22, thereby indirectly and substantially. 22 is an axis parallel to its lower edge (in this embodiment, the axis in this originally virtual and geometrical meaning is the central axis of the reinforcing rod 25 or the hinge 26 ,. .. (which coincides with the rotation axis of ...), but is pivotally attached to the support member 40 in a rotatable relationship. In the illustrated embodiment, the lower door piece 22
The pivoting members 24, 25, 26 for pivoting are also provided with an axis parallel to the upper edge of the lower door 30 (also like the central axis or hinge of the reinforcing rod 25 in this embodiment, as will be described later). 26, ...
It also serves as a member that is pivotally attached to the support member 40 so as to be rotatable about the rotation axis thereof.

The support member 40 itself is guided by a guide mechanism so as to be movable in the height direction (vertical direction) along the side edge of the container opening. In this embodiment, the guide mechanism is a narrow groove 41 formed in the height direction on the inner surface of the container side wall 12 near the container opening.
And rollers 42 that roll along the inner wall of the groove 41, in which case the rotation axes of the three rollers 42, ... By being fixed to the member 40, the support member 40 is guided so as to move up and down along the groove 41. This guide mechanism is shown in FIG. 6 to explain the safety stopper mechanism later.
6, the groove 41 is not a groove directly drilled in the inner surface portion of the container side wall 12, but is provided along the inner surface portion. And the channel member 43 is formed. Further, the guide mechanisms 41 and 42 and the support member 40 are
Desirably, a pair is provided along the inner surfaces of the opposite side walls 12, 12 of the container housing.

The support member 40 is also connected to a load receiving device that receives the weight of the lower door 30 and the upper door 20 and exerts a pulling force in a direction opposite to the weight direction. This is as described below
This is to improve workability when opening the container opening portion 11 by pulling up the lower door 30 together with folding the upper door 20, but the load receiving device in the illustrated embodiment is Has a wire 52 which is fixed to a suitable part of the support member 40, for example its upper end, and whose other end is connected to one end of the spring means 51. What is used as the spring means 51 in this embodiment is a commercially available gas-filled spring, which is composed of a cylinder and a piston, and is filled with gas in the cylinder, which is housed in a casing 53 having an appropriate rigidity. The one end of the cylinder on the side opposite to is fixed downward to the inner surface of the container side wall 12 while being fixed to the casing 53. Therefore, since the piston end faces downward and the other end of the wire 52 is fixed to this, the wire movement path between the fixed end to the support member 40 and the fixed end to the piston end of the spring means 51 is set. The wire 52 is guided by fixed sheaves 54, 55 and movable sheaves 56 in order to establish and also to effectively compact the area required for the pay-out and pull-in lengths of the wire.

Of course, if such a wire connection structure is adopted, the installation position and installation posture of the spring means 51 can be set to an arbitrary arbitrary number by providing an appropriate number of fixed pulleys and movable pulleys at appropriate places. Unlike the above, it can be installed in parallel along the ceiling surface of the inner wall of the container, or if necessary, it can also be installed in an extra space under the floor of the vehicle equipped with the container, thus increasing the space factor. In principle, such a load receiving device has been proposed in various ways, even if it is a known existing technique, and it can be arbitrarily adopted in the present invention. It is better to avoid the balance weight type used in mold door devices. While running, this causes sideways vibrations, abnormal noise is generated, and a balance weight having substantially the same weight as the weight of the entire door is required, resulting in an increase in vehicle weight. This is because it has been pointed out as one of the drawbacks of the conventional folding door device.

Next, the spring device 60, which is the element for forming the lock mechanism for the lower door 30 and the element for assisting the opening operation, will be described. In this case, in the vicinity of the lower end of the supporting member 40 whose vertical movement is guided by the guide mechanism mentioned above, a spring device is provided.
As 60, the piston end of the gas-filled spring, also used in this embodiment, is pivotally mounted. A cylinder end, which is an end portion opposed to this, is pivotally mounted on a projection piece 61 that rises from the inner surface of the lower door 30 and projects toward the inside of the container. Therefore, as shown in FIG. 3, in the state where the lower door 30 closes the opening along the container opening, the gas filling spring as the spring device 60 has a size such that the protruding piece 61 projects inward of the container. Accordingly, as shown by the arrow f1, the posture is such that the container inclines slightly inward.
Therefore, in this posture, if the dimensions of the respective parts are set so that the spring force of the spring is not the most contracted state in which the spring force is the strongest but the expanded state, the spring device 60 has the vector component in the arrow direction. A stable pulling force can be exerted on f2.

As is apparent, this pulling force f2 is
In FIG. 3, 30 becomes a resistance force against the force to open by rotating in the direction of arrow A, and always works to maintain the closed state of the lower door 30. This is an effective means of ensuring safety to prevent accidental opening of the door while the vehicle equipped with this container is running.

On the other hand, when the operator intentionally tries to open the lower door 30 in the direction of arrow A in FIG. 3, until the axial center of the spring device or the gas filling spring 60 is oriented substantially vertically. Shows resistance at first, but if you pull the lower edge of the lower door 30 against this force, a kind of toggle function is realized and the spring device
60 in turn exerts a biasing force in the direction A in which the lower door 30 is raised around the axis parallel to the upper edge of the lower door so that the operator can
Works to reduce the force of lifting the lower edge of 30. In addition,
The fully opened state of the lower door 30 is indicated by an imaginary line in FIG.
As indicated by the solid lines in the drawing, respectively, it is desirable that the horizontal state is almost the same, and the mounting position of the protruding piece 61 and its dimensions are designed so as to achieve such a state according to the longest extension amount of the spring device 60. Of course, this spring device 60 also has a function of receiving the load of the lower door 30, as understood from the above function.

The lower door 30 has, as schematically shown in FIGS. 1 and 2, a locking device normally provided in this type of door device.
31 is also provided. However, the locking device 31 may be similar to the locking device used in the conventional door device, and is not shown in detail. For example, when a worker operates the handle, a protrusion or a pin provided on the side of the lower door 30 can be locked or unlocked by going in or out of a groove or a hole provided on the container housing side. It is easy to do. The barbed type is also a commonly used locking structure, so that is acceptable. In other words, in the case of the present invention, since the lower door closing lock mechanism including the above-mentioned spring device 60 is complete, even if such a locking device 31 is simple, in comparison with the door device of the conventional structure, It is safe because problems such as accidental release are much less likely to occur.

Further, in this embodiment, the upper door 20 is also provided with a lock mechanism and an opening assist mechanism. That is, as shown in FIGS. 1 and 2, in this embodiment, first,
There is an operation lever 71 provided along the lower portion of the side surface of the container housing. As shown in FIGS. 1 and 2, the operation lever 71 is grasped by an operator and selectively pulled or pushed in the lateral direction. However, in FIGS. For the sake of explanation, the operating lever 71 is shown by a solid line, though it is hidden behind the side surface of the container, and the movement thereof is also shown by being replaced with a vertical rotational movement because the lateral movement is not well understood.

A toggle device 72 including a spring means, which may be a coil spring, is connected to the operating lever 71, and the operating lever is moved from a position substantially parallel to the container side surfaces 12, 12 as shown in the relationship shown in FIGS. When the tip thereof is slightly pushed further to the side surface of the container, the operating lever 71 is urged and locked in the direction of maintaining the stored state of FIG. 1 by the spring means built in the toggle device 72, and from this state, reversely. When the tip of the operating lever 71 is pulled outward in the lateral direction, there is initial resistance, but when the maximum resistance position is exceeded, the toggle device 71 urges the operating lever in the direction to pull it out completely.

Further, the spring force of the spring means incorporated in the toggle device 72 not only unlocks the closed lock state of the upper door 30, but also causes the upper door 30 to begin to open lightly in a "doglegged" shape. Give birth. To explain this, first, the linkage device 72 is connected to a linkage mechanism including a pair of rods 73, 73 extending along the left and right side edges of the container opening and connected by a lateral connecting rod 74. The distal end of 73 is raised when the operation lever 71 is pulled and lowered when pushed in the storage direction along the side wall of the container. Such a rod 7
Locking pieces 75 and 75 are fixed to the tips of the shafts 3 and 73, respectively.

The locking pieces 75, 75 have a downward U-shaped groove, and when the upper door 20 is in the fully closed state as shown in FIGS. When both the door piece 21 and the lower door piece 22 are in close contact with the peripheral edge of the container opening portion 11 and are in a flat juxtaposed relationship with each other), the lower door piece 22
The locked pins 76, 76 projecting laterally further from the side edge of the container are held down, and the toggle device 72 acts to exert a force in the direction of pressing the lower door 22 against the peripheral edge of the container. There is.

When the operator pulls the operating lever 71 to the front in the lateral direction from this state, the rods 73 ascend through the linkage mechanism, and the locking pieces 75, 75 are changed from the state shown in FIG. As indicated by a phantom line in FIG. 4 and a solid line in FIG. 5, the pin starts to rotate toward the final rotation posture state, and in the process, the locked pin is opened through the downward outlet opening in the U shape. In addition to releasing 76, 76, the pin 77, 78 on the container opening side of the pair of legs 77, 78 forming a U-shape holds the locked pin 76,
76 is pushed diagonally upward, which pushes the lower door piece 22 upward to form the first small "dogleg" between the upper door piece 21 and the upper door piece 20 at the beginning of opening. At this time, the spring force of the spring means incorporated in the toggle device 72 exerts a force that assists the operation in the opening direction.

From the above-mentioned structure, the characteristic opening and closing operations of the door device according to the present invention are almost already apparent, but will be described again below.

First, as shown in FIGS. 2 and 3, when both the upper door 20 and the lower door 30 are fully closed, the locking device 31 may be provided as needed to close the door. Not only can it be maintained, but the spring device 60, which is the closed state locking mechanism provided by the present invention, exerts a force in the direction of arrow f2 in FIG. 3 to lock the lower door 30 in the closed state. As for the upper door 20, the pair of locked pins 76, 76 provided on the side portion of the lower door piece 22 of the upper door 20 have locking pieces 75,
The closed state is maintained because it may enter the downward U-shaped groove 75 and be pressed against the container opening side by the spring force of the toggle device 72.

Here, an operator unlocks the locking device 31 of the lower door 30 and holds a handle such as a handle attached to the locking device 31 to move the lower edge side of the lower door 30 forward and slightly obliquely upward. When the spring device 60 is pulled, initially, a pulling force is required to resist the force of the spring device 60 until the axis of the spring device 60 becomes substantially vertical, but the maximum spring force position where the spring device 60 contracts most (dead point When it goes over the (position), it suddenly becomes lighter, and in this embodiment, the lower edge of the lower door 30 is rotated around an axis parallel to the upper edge of the lower door 30 via a shaft mounting member including a hinge 26. Only the lower door 30 can be opened first in the direction shown by the arrow A in FIG.

Therefore, when the load is small or small articles in the container can be carried in and out even when the lower door 30 is open, the work can be carried in and out, which is extremely convenient. In addition, even if a load collapse occurs while traveling, by opening only this lower door 30, while preventing the large piles of stacked luggage from collapsing (in the inner surface of the closed upper door 20, It is possible to organize the load while supporting the upper one that is about to collapse. This open state of the lower door is clearly shown in FIG. 1 (A).

When closing the opened lower door 30, as shown by an arrow B in FIG. 3, the lower edge of the lower door 30 is pushed obliquely downward to the container opening 11 side, and the lower door 30 is closed. Is rotated downward about an axis parallel to its upper edge. This pressing work is performed against the spring force of the spring device 60, but the lower door
30 is almost closed and turned down near the end, and the spring device 60
Is almost vertical again, and when the position where the spring force is maximized is exceeded, as described above, the spring force of the spring device 60 prevents the lower door 30 even if the operator does not apply a particularly large pressing force.
Is pulled to the container side and locked in the fully closed state.

On the other hand, as shown in FIG. 1 (A) and FIG.
When it is desired to further open the upper door 20 from the state in which the lower door 30 is open, in FIG. The operation lever 71 housed in the lower part is pulled out in the lateral direction against the spring force of the toggle device 72, and the locking piece 75 is rotated through a linkage mechanism including a pair of rods 73, 73,
By releasing the restraint of the locked pin 76 by the procedure already described, and by the spring force expected in the toggle device 72, the leg portion 77 on the container side of the locking piece 75 moves the locked pin 76 as described above. By pushing out, the upper door piece 21 and the lower door piece 22 of the upper door 20 are lightly made to have a "dogleg" shape.

In this state, if the lower door 30 which has already been opened is lifted up in the direction of arrow D in FIG. 4, the supporting member 40 guided by the guide mechanism and the spring means 51 as described above are included. Under the aid of the load receiving device, the whole can be pushed up relatively lightly upward, and as it goes up, the upper door piece 21 and the lower door piece 22 of the upper door 20 are mutually pivoting devices. While rotating around the hinge 23, the "dogleg" is gradually collapsed, and finally the posture is changed so as to fold each other.

FIG. 1 (B) shows a state close to a fully open state, and FIG.
Shows a fully opened state, but when the upper door 20 is also opened in this way, the opening opening of the container opening portion 11 can be made sufficiently large, and loading and unloading of luggage is easy.

To close the fully opened door, the lower door 30 may be pushed down in the direction opposite to the arrow D in FIG. 4 (that is, downward) by using the lower door 30 as a clue. Then, the lower edge of the lower door piece 22 of the upper door 20 descends together with the lowering of the support member 40 via the hinge 26 which is a shaft-attaching member,
The lower door piece 22 and the upper door piece 21 are also rotated relative to each other by the hinges 23, which are shaft-attaching members, and their postures are changed so as to become flat. And in the process, the lower door piece
Locked pin provided to project from the side of 22
After 76 hits the outer edge of the outer leg 78 among the U-shaped legs 77, 78 of the locking piece 75, the locked pin 76 presses the locking piece 75 toward the container, While returning the locking piece 75 to the initial posture, it eventually enters the downward U-shaped groove of the locking piece 75 and is locked. Therefore, if the operator thereafter pushes the operation lever 71 toward the container, the locking piece 75 presses the locked pin 76 toward the container by the toggle mechanism of the toggle device 72 and the built-in spring force, and thus the upper door. 20 will be kept in a closed state.

After this, if the lower door 30 is closed as described above, the state returns to the door fully closed state, which is the first state in this operation description.

However, the door device according to the present invention can be opened and closed by the following procedure in addition to the above-mentioned opening and closing operation. That is, although the locking device 31 of the lower door 30 is unlocked at the same time, the upper lever 20 can be unlocked by operating the operation lever 71 before opening the lower door 30. By doing so, as is clear from the mechanism described above, even before the lower door 30 is opened, it is possible to open only the upper door 20 halfway or even to fully open it. This is extremely convenient to use. For example, when the vehicle is retracted to the cargo platform and the container opening is directly attached, if the lower edge of the door is lower and there is a step between the platform and the platform, the conventional door device is used. , In particular, in the double door type and the folding type that folds a large door piece, the door does not open by hitting the edge of the platform, so there was an inconvenience and danger of having to open the door in advance and then retreat, but if it is the door device of the present invention, In such a case, the upper door 20 may be raised at least to the position where the step is eliminated before opening the lower door 30. Then open the lower door 30. This workability and safety deserve special praise in this kind of field. Of course, even in such a situation, when the vehicle is retracted with the door open, the door device according to the present invention does not obstruct the rear view.

The operation of the door device as an embodiment constructed according to the present invention has been described above.
Since both 30 and the upper door 20 include linear vertical movement as part of its operating mechanism, it is best to prevent twisting, tilting, etc. during such vertical movement. From the standpoint of increasing the reliability of the product and increasing the product value, smooth vertical movement is desired. Therefore, in this embodiment, as mentioned a little earlier, as a desirable consideration, a support member 40 that supports the lower edge of the lower door piece of the lower door 30 and the upper door 20 and substantially controls the vertical movement thereof and its guide. The mechanism is provided for each of a pair of opposing side walls inside the side surface of the container. The center of the hinge 26 as a shaft mounting member that pivotally mounts the lower edge of the lower door piece 22 of the upper door 20 and the upper edge of the lower door 30 to the support member 40 is made of steel of a certain diameter or more. Through the reinforcing rod 25, the rigidity of the lower door
The relative twist and inclination of 30 and the upper door 20 are prevented.

Note that, as described above, when referring to the shaft attachment to the support member or the container housing, for example, they are not limited to the direct ones. Even if it is indirectly provided through some member, if it is recognized that it substantially fulfills the same function as the shaft attachment to the supporting member or the container housing, those components are naturally included in the gist of the present invention. For example, it is the portion near the upper edge of the lower door 30 that is directly pivotally attached to the support member 40, and the lower door piece 22 of the upper door 20.
The lower edge is not directly attached to the support member,
Even when the lower door 30 is pivotally attached to the lower door 30 and vice versa, both the lower door piece 22 and the lower door 30 are eventually axially attached to the support member 40. . It is needless to say that the shaft mounting member itself is not limited to the illustrated hinge and can be selected from known existing element groups.

However, in the illustrated embodiment, the spring means 51 is selected for the load receiving device instead of the balance weight for the reason already described, and the wire 52 is provided between the spring means 51 and the supporting member 40.
Are linked by Therefore, it is desirable to consider the safety when the wire 52 suddenly breaks.
In the illustrated embodiment, a safety stopper device 80 as schematically shown in FIG. 6 is incorporated.

FIG. 6 is a schematic enlarged view of a fixed portion between the support member 40 and one end of the wire 52, and a safety stopper device 80 is interposed between them. FIG. 6 (A) is a cross-sectional end view of the main part as seen from above, which rolls in the channel member 43 for forming the guide groove 41 provided in the container side wall 12 and the inner surface thereof already described, and the guide groove 41. Rotor 42, rotor 42
The support member 40 that moves up and down while being guided substantially in the guide groove by holding the rotation axis of is shown. On the other hand, FIG. 6 (B) is an explanatory diagram of the vicinity of the side edge portion when the container opening 11 is viewed from the front. As shown in these figures, this is quite common in
Around the peripheral edge of 11, and at least the side edge shown in the figure, when the door is closed, the inner surface of the door is abutted to keep the watertightness of the inside of the container. An elastic seal member 81 is attached. However, in this embodiment, focusing on the thickness of the elastic seal member 81,
By making it sufficiently thick, when the wire 52 is broken, the stopper piece 82 bites into the side surface of the wire 52 to quickly prevent the door from falling.

That is, in this case, the stopper piece 82 is an L-shaped piece.
A shaft center 85 that is configured as one leg of 83 and is provided in a support frame 84 fixed to the upper end of the support member 40.
Passes through the center of the bent portion of the L-shaped piece 83. Then, the other leg portion 86 of the L-shaped piece 83 has the other end portion (not shown) connected to the load receiving device described above, and one end portion of the fixed wire 52 passes through the leg portion 86, which is schematically shown. The wire end portion is fixed to one leg portion 86 of the L-shaped piece 83 via an adjuster 87 for adjusting the wire length. Therefore, the leg portion 86 of the L-shaped piece 83 is always subjected to the force of being pulled upward in the drawing, but the support frame 84 is also provided with the locking portion 88 that holds down the upper surface of the leg portion 86. Therefore, the end portion of the leg portion 86 does not rotate upward around the axis 85 more than the posture shown in the drawing, and the pulling force of the wire 52 is the L-shaped piece 83, the locking portion 88, and the supporting portion. Frame 84
Through the support member 40 of the door.

However, the leg portion 86 of the L-shaped piece 83 is always driven by the spring member 89 as shown by the arrow f3 in FIG. 6 (B).
Since the wire 52 is urged in the direction opposite to the pull-up direction, the spring force of the load receiver connected to the wire 52 resists the urging force of the spring member 89 and causes the door body to move with the desired force. Designed so that it can be pulled up.

When the wire 52 is normal, the L-shaped piece 83 takes the normal posture shown in FIG. 6, and at this time, in this embodiment, the other leg of the L-shaped piece 83 is used. Since the configured stopper piece 82 also has a posture parallel to the elastic seal member 81, it does not have any substantial function.
The door opening / closing operation according to the present invention described above can be performed as it is.

However, if the wire 52 breaks for some reason while the upper door 20 is open, the spring force of the spring member 89 provided in the safety stopper device becomes dominant, and the L-shaped piece. 83 is rotated downward about the axis 85, so that the stopper piece 82 swiftly rotates as shown by arrow E in FIG. 6 (B), and the elastic seal member 81 beside it is rotated. It bites into the side surface and immediately prevents the support member 40 from falling.

In this way, safety is maintained even if the wire breaks. However, after the operator confirms that the safety stopper mechanism has worked and the support member 40 has stopped falling, whether at the time of repairing or unloading the load at that time, at least while being careful However, it would be more convenient and practical if the door could be opened and closed manually again. Therefore, in the illustrated safety stopper device 80, a through hole 90 which is aligned with the support frame 84 and the one leg portion 86 of the L-shaped piece in a normal state is formed and can be inserted into this through hole as a separate component. Pin 91 is available. That is, in order to manually release the stopper function, the L-shaped piece 83 is manually returned to the normal posture, and the pin 91 is inserted into the through hole 90 so as to maintain the state. As a result, the stopper piece 82 returns to the original position, so that the door can be opened and closed once again.

In the illustrated case, the elastic seal member 81 is effectively used and is also used as a part of the stopper device, but a dedicated elastic member may be separately attached to the container housing.
Of course, those skilled in the art can arbitrarily change the design of the shape of the stopper piece 82 and the shape and position of the locking portion 88 in the normal state. Instead of the elastic member, for example, a continuous member having jagged serrations may be provided in the vertical direction, and the stopper piece may be assembled so as to exhibit a stopper function by engaging with the recessed portion of the depressions.

Although detailed description has been made in connection with the embodiment shown in the drawings, the modifications according to the gist of the present invention are of course possible. Further, in the illustrated embodiment, the upper door 20 is composed of the two door pieces 21 and 22, but it is also possible to adopt a folding structure by connecting four or more pieces. In that case, n is a positive integer of 2 or more, and first, among the plurality of door pieces, the uppermost door piece is adjacent to the lowermost 2nth door piece. Align the comrades with each other. Further, the first door piece is pivotally attached to the container housing portion 10 in the vicinity of the upper edge so as to be rotatable about an axis parallel to the upper edge, and the 2nth door piece is parallel to the lower edge. It is attached to the support member 40 so as to be rotatable about an axis. Then, i is 2
If all positive integers not less than n are given, (2i-2)
The mutually pivoted portions of the second door piece and the (2i-1) th door piece are pivotally attached to a guided member that is vertically movable along a side edge of the container opening portion 11 by a guide mechanism. However, the guide mechanism here may be substantially the same as or integral with the guide mechanism of the support member 40, or may be arranged side by side separately from the guide mechanism.

Further, the lower door 30 is also a single door body in the illustrated case, but may be deformed to be composed of two door pieces divided into left and right, or a small door for taking out a small lot. It may be a door having a window. For example, in the case of a door body that is divided into left and right, the left and right door pieces can be opened and closed individually by unwinding the connecting rods, and the door pieces can be opened and closed together by connecting with the connecting rods.

[0055]

According to the present invention, as will be described below, various advantages can be obtained so far as it can be called a definitive version of this kind of door device at present.・ Open only the lower door,
Alternatively, only the upper half of the container opening can be opened by first folding only the upper door and pulling the lower door upward, so that small-scale loading and unloading can be efficiently performed. There is no need to open it all the time even if it is not necessary.・ Even if there is a step between the floor of the container and the platform for loading and unloading luggage, even if the floor of the container or the lower edge of the lower door is lower, the upper door is pulled up first and then the required amount is lowered. Since the procedure for opening the door can be taken, it is possible to avoid the trouble and danger of having to open the door in a wide area in advance and then retract the vehicle equipped with the container, as in the conventional case. -In addition, even if the vehicle needs to retreat with the door open for some reason, there is no factor that hinders the rear view through the side mirror of the vehicle, which is safe. -Even if a load collapse occurs inside the container, you can open the lower door only to take out the load, or fix such a load collapse. -Even if the load falls toward the upper door, the upper and lower door pieces, which are dimensionally large, make a large "dog-shaped" like a conventional folding type, and the load is caught in this and the door is closed. There is little fear that it will not open. In the case of the present invention, the size of each door piece itself constituting the upper door in the height direction is small, and the dogleg shape formed by them is also small, so that the probability that a load is caught therein is low. A small load is caught, but such a small load has a low risk of obstructing the opening and closing of the door itself, and is easily detached. -Since a lock mechanism for keeping the lower door closed is built in, there is less risk of accidentally opening the lower door while the vehicle is running, and safety is high.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a door device for explaining a door opening / closing operation in an embodiment configured as a door device for a box-shaped container according to the present invention.

FIG. 2 is a schematic perspective view of the embodiment shown in FIG. 1 in a fully closed state of the door.

FIG. 3 is a longitudinal sectional view of a main part of the embodiment of the present invention in a fully closed state of the door.

FIG. 4 is a longitudinal sectional view of an essential part of an embodiment of the present invention in a state where only a lower door is opened.

FIG. 5 is a longitudinal sectional view of a main part of the embodiment of the present invention in a state where the door is fully opened.

FIG. 6 is a schematic configuration diagram for explaining a safety stopper mechanism incorporated in the embodiment of the present invention.

[Explanation of symbols]

 10 container housing, 11 container opening, 12 container side wall, 13 hinge, 20 upper door, 21 upper door upper door piece, 22 upper door lower door piece, 23 hinge, 24 tongue piece, 25 reinforcing rod, 26 hinge , 30 lower door, 31 locking device, 40 support member, 41 guide groove, 42 roller, 43 channel member, 51 spring means, 52 wire, 53 casing, 54 fixed pulley, 55 fixed pulley, 56 movable pulley, 60 spring device, 61 Projection piece, 71 Control lever, 72 Toggle device, 73 Rod, 74 Connecting rod, 75 Locking piece, 76 Locked pin, 77 Locking piece leg part, 78 Locking piece facing leg part, 80 Safety stopper device, 81 elastic seal member, 82 stopper piece, 83 L-shaped piece, 84 support frame, 85 axis, 86 L-shaped piece leg, 87 adjuster, 88 locking part, 89 spring member, 90 through hole, 91 pin ．

Claims (4)

[Scope of utility model registration request] 1. A door device which is opened in a housing of a box-shaped container for storing luggage and selectively opens and closes an opening portion for loading and unloading the luggage; The covering door comprises an upper door and a lower door which are adjacent to each other in the height direction; the upper door further comprises two upper and lower door pieces juxtaposed in the height direction of the container opening. , These two door pieces are axially mounted so as to be able to be folded over each other along their adjacent edges, while the upper door piece is pivotable about an axis parallel to its upper edge. In the vicinity, is pivotally attached to the container housing portion, and the lower door piece is pivotally attached to the support member so as to be rotatable around an axis parallel to the lower edge of
The supporting member is guided by a guide mechanism so as to be vertically movable along the side edge of the container opening; and the lower door is
While pivotally attached to the support member such that the entire lower door is pivotable about an axis parallel to its upper edge; the support member also receives the weight of the lower door and the upper door, Having a pulling force in a direction opposite to the weight direction of the both doors, the load receiving device fixed to the container housing is connected; and further, one end of a spring device is pivotally attached to the lower door, and the spring device is attached. The other end of the spring is pivotally attached to the support member, and the spring device exerts a force to pull the lower door inward of the container in a slightly extended state when the lower door closes the container opening. , The spring force is maximized at a position where the lower door is most contracted as the lower door is opened, and when the lower door is exceeded, the spring force is attached so that the spring force acts in a direction to assist pulling up and opening of the lower door. Characteristic box-shaped container door device. 2. The door device for a box-shaped container according to claim 1, wherein the load receiving device has a wire whose one end is fixed to the supporting member, and one end of which is fixed to the other end of the wire. , The other end comprises spring means fixed to the container housing, and pulley means for guiding the movement of the wire between the fixed end to the support member and the fixed end to the spring means. A spring device receives the weight of the lower door and the upper door and exerts a pulling force in a direction opposite to the weight direction of the both doors; 3. The door device for a box-shaped container according to claim 1, wherein the upper door is composed of two door pieces, the upper door piece and the lower door piece. , N is a positive integer greater than or equal to 2 and is composed of 2n door pieces adjacent to each other; and among the plurality of door pieces, the 2n-th door is located from the topmost door piece to the bottommost door piece. Up to one piece, adjacent ones are axially attached to each other, and the first door piece is axially attached to the container housing portion in the vicinity of the upper edge so as to be rotatable around an axis parallel to the upper edge. The second door piece is pivotally attached to the support member so as to be rotatable about an axis parallel to its lower edge, and i is all positive integers of 2 or more and n or less, (2i-2). The mutually axially-attached portions of the second door piece and the (2i-1) th door piece are formed by the guide mechanism on the side edges of the container opening portion. A box-shaped container door device characterized by being pivotally attached to a guided member which is vertically movable along the. 4. The door device for a box-shaped container according to claim 3, wherein the guide mechanism is the guide mechanism, and the guided member is integral with the support member. Container door device.