JP2009249926A - Opening/closing mechanism of back door of container or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve an opening/closing mechanism of a container etc. for facilitating opening and closing and for stabilizing the opening/closing mechanism. <P>SOLUTION: Vertically extending rod members are rotatably mounted on outer surfaces of back doors (a), (b) which are opened and closed in right and left directions of a back face of the container. The rod members are provided with laterally extending handles. The opening/closing mechanism comprises a first engaging mechanism (A) which works to make lower ends of the rod members engaged with a lower frame of the container when the rod members are rotated and the handles are fixed to the outer surfaces of the back doors (a), (b), and works to make them disengaged from each other when the rod members are rotated and the handles are moved away from the outer surfaces of the back doors (a), (b). The opening/closing mechanism further comprises a second engaging mechanism (B) which works to make the upper end of the rod member engaged with the back door (b) when the rod member on the side of the back door (a) is extended upward and rotated to fix the handles to the outer surfaces of the back doors (a), (b) and works to make them disengaged from each other when the rod member is rotated and the handle is moved away from the outer surface of the back door (a). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an opening / closing mechanism for a rear door such as a container for storing waste or a truck for carrying earth and sand.

Hereinafter, the present invention will be described on behalf of an opening / closing mechanism for a rear door of a container for transporting waste generated from a factory or a construction work site.
A large amount of waste / garbage is generated at factories and construction work sites, and this relates to containers for transporting this to a disposal site. Usually, a large container is placed in a predetermined place, waste etc. is thrown into the container from above, this full container is loaded into a container-type transporter for transportation, and the empty container is used repeatedly To do.

  Widely used containers are a rectangular bottom plate with four side lower frames, left and right side plates, front plates, and rear doors that open and close to the left and right (hereinafter referred to as doors if there are no problems), A support wheel that is provided with a latching portion for lifting to the transport vehicle at the outer upper portion of the front plate, and that rolls when loaded on the container transport vehicle near the rear end of the bottom plate, and a support leg to the lower side of the front end It has the structure which provided.

  When the container is fully loaded, the container carrier's lager is hooked on the latching part, the front is lifted up, the rear part is tilted to support the bearing wheel, and the container carrier is pulled up and loaded, and then disposed of at the disposal site. The container is transported to an inclined position by pulling up the front part with a lager, and the waste in the container is discharged and disposed of, and the empty container is returned to its original position for repeated use. The door of the container employs a locking mechanism, and is opened when the waste is discharged from the container, so that the waste and the like start to slide.

  FIG. 1 is a front view of a conventional opening / closing mechanism for a door 41 of a container 40, and shows a state in which the door 41 is closed. The door 41 of the container 40 is opened to the left and right so as to be a so-called double door opening from the center (41a, 41b). First, the first locking mechanism (p) will be described based on the door 41b. A handle 44 is supported on the outer surface of the door 41b by a support shaft 45, and a spring 46 is mounted on the front side 44a of the handle 44 so as to move upward. It is energized. On the other hand, the rear side 44b of the handle 44 is provided with a shaft 47 that hangs down through a rotating shaft 48. The shaft 47 has a structure in which the tip hangs down in the vertical direction by its own weight. A receiving cylinder 43 is provided on the lower frame 42 corresponding to the tip of the shaft.

  However, when the door 41b is opened, the front side 44a of the handle 44 is pulled downward (arrow y1) against the bias of the spring 46, as shown by the dotted line in FIG. For this reason, the tip of the shaft 47 stored in the receiving tube 43 is pulled up, and the relationship between the two is lost. That is, when the tip of the shaft 47 is removed from the receiving tube 43, the door 41b is unlocked and the door 41b can be opened.

On the other hand, in order to close the door 41b, the front side 44a of the handle 44 is lowered against the bias of the spring 46, the tip of the shaft 47 is moved directly above the cylinder 43, and the front side 44a of the handle 44 is raised while receiving the cylinder. 43, when the tip of the shaft 47 is placed and the hand 44 is released from the handle 44, the handle 44 is biased upward by the spring 46, and the tip of the shaft 47 is placed in the receiving tube 43 so that both are locked. It is a mechanism.
The opening and closing of the door 41a is exactly the same, and the description is omitted.

Now, the 2nd latching mechanism (q) is provided so that the upper end of door 41a, 41b may not open. Here, the opening and closing of the door 41a will be described with reference to FIG. 1 and FIG. 2. A channel member 49 having a U-shaped cross-section with the upper end 41a1 of the door 41b sandwiching the upper end 41b1 of the door 41b from above is rotatable. The connecting member 51 is attached between the middle 49a of the channel member 49 and the support shaft 45 on the rear side 44b of the handle 44 on the door 41a side.
In the second locking mechanism (q), when the front side 44a of the handle 44 is lowered against the urging force of the spring 46 (arrow y1), the rear side 44b of the handle 44 moves upward, as described above. At the same time that the tip of the shaft 47 comes out of the receiving tube 43, the connecting member 51 is also pushed up (arrow y2). The pinching at the shape part is released.

Of course, in order to close the door 41a, the front end 44a of the handle 44 on the side of the door 41a is once lowered, and thereby the tip of the shaft 47 is received above the cylinder 43 and the connecting member 51 is pushed up. The U-shaped portion is also positioned above the front end 44b1 of the door 41b, and then the front end 44a of the handle 44 is returned to the original position according to the bias of the spring 46, and the second locking mechanism (b) It will be closed simultaneously with mechanism (a).
In FIG. 1, a third locking mechanism (r) is provided at substantially the center of the side surfaces of the doors 41a and 41b to further open and close the doors 41a and 41b. -It consists of a pin 55 and a pin 56, but detailed description is omitted here.

  Of these opening / closing mechanisms, the most important opening / closing mechanism is the first locking mechanism (p), but in this portion, the engagement between the tip of the shaft 47 and the receiving cylinder 43 can be surely performed. is necessary. However, the rear side 44b of the handle 44 on which the shaft 47 is provided rotates up and down (arrow y1) along the locus of circular motion during the operation, that is, by the support shaft 45. For this reason, the tip of the shaft 47 forms a circular motion locus with respect to the receiving tube 43, and is not always directly above the mating receiving tube 43 as shown by the dotted line. For this reason, the tip of the shaft 47 does not surely fit in the receiving tube 43. In particular, when a large external pressure that causes deformation of the shaft 45, deformation of the receiving tube 43, or the like is applied, the relative position often shifts and is not engaged smoothly.

  There is also a problem with the second locking mechanism (q). If the waste material such as wood or steel is covered with the channel material 49 sandwiched between the upper ends 41a1 and 44b1 of the container doors 41a and 41b, the channel material 49 There is a drawback that the doors 41a and 41b cannot be opened.

  The present invention relates to an improvement of an opening / closing mechanism such as the container described above, and proposes a stable opening / closing mechanism that is easy to open and close.

  The container rear door opening and closing mechanism according to the present invention has a bar extending in the vertical direction on the outer surface of the rear doors a and b that opens and closes to the left and right of the container rear surface, and is rotatably mounted with a bar. When the handle is fixed to the outer surface of the rear doors a and b by rotating the bar, the lower end of the bar and the lower frame of the container are locked, and the bar is rotated to provide a handle. The first locking mechanism (A) that is unlocked when the doors are separated from the outer surfaces of the rear doors a and b, and the bar on the rear door a side are extended upward, and the bar is rotated to rotate the rear door When the handle is fixed to the outer surfaces of a and b, the upper end of the bar and the rear door b are locked, and when the handle is rotated away from the outer surface of the rear door a, the lock is released. And a second locking mechanism (B).

  Specifically, the first locking mechanism (A) includes a receiving member that engages with the hook in the lower frame, the lower end of the bar reaching the lower frame of the container, the bar having a hook, and the lower frame. This is a mechanism for opening and closing the container rear door. Needless to say, the hook and the receiving member may be attached to the bar and the lower frame in reverse.

As a specific example of the second locking mechanism (B), the upper end of the bar is a crank mechanism, a hook is provided at the tip of the hinge of the crank mechanism, and a receiving member that engages with the hook is provided on the rear door b side. The container rear door opening / closing mechanism is provided, and even in this case, it is possible to reversely attach the hook and the receiving member.
The crank mechanism is composed of a crank portion extending perpendicularly to the upper end of the bar and a hinge rotatably mounted on the crank. When the handle formed on the bar is fixed to the rear door a The hinge is preferably an opening / closing mechanism that is housed in the rear door side of the bar.
In the second locking mechanism (B), it is preferable that a control member that prevents excessive movement of the hinge from the door a is disposed outside the substantially center of the hinge.

  The present invention has the above-described configuration, and the container opening / closing mechanism includes the locking mechanisms (A, B) above and below the door, and can be reliably opened and closed with one touch by rotating the handle. The practical effect is great.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 3 is a front view showing the opening / closing mechanism of the present invention, and shows a state in which each locking mechanism is closed. In the figure, doors 1a and 1b that open to the left and right are provided on the rear surface of the container 1, and are opened mainly when waste is discharged. The first locking mechanism (A) is disposed between the lower frame 2 of the container 1 and the doors 1a and 1b, and the second locking mechanism (B) is used to lock the upper ends of the doors 1a and 1b. A bar 3 for connecting and opening the second locking mechanism (B) at the same time is connected to one door (in this example, the door 1a side) and the other door (door) is arranged. 1b side) is provided with only the first locking mechanism (A).

  The first locking mechanism (A) of the present invention includes a vertically extending bar 3 that is rotatable on the outer surfaces of the doors 1a and 1b, and a receiving member that engages with the bar 3 on the lower frame 2. It is a thing. If it says further about the bar 3, this bar 3 will be rotatably arrange | positioned through the flange 5 welded to the doors 1a and 1b, and the handle 6 which brings about this rotation is welded. On the other hand, the doors 1a and 1b are provided with a detachable member 7 so as to be fixed at a position parallel to the doors 1a and 1b. A hook 8 is welded to the bar 3, and a receiving member 9 for the hook 8 is provided on the lower frame 2.

  The relationship between the hook 8 and the receiving member 9 of the first locking mechanism (A) is shown in FIGS. 4 and 5, and the bar 3 is rotated together with the handle 6 so that the handle 6 is separated from the doors 1 a and 1 b. When turned, both engagements are released. That is, in FIG. 4, the handle 6 shows a state when it is fixed to the outer surfaces of the doors 1a and 1b by the detachable member 7 as shown in FIG. Along with the rotation, this also rotates (arrow y3). Therefore, as shown in FIG. 5, the hook 8 and the receiving member 9 are initially engaged with each other, but the hook 8 is detached from the receiving member 9 by the rotation of the bar 3.

  On the other hand, when the handle 6 is housed in the detachable member 7 provided in the doors 1a and 1b, the hook 8 and the receiving member 9 are engaged.

  More specifically, the hook 8 protrudes at a right angle to the bar 3 and the portion (the depression 8a side) that is engaged with the receiving member 9 when the handle 6 rotates to approach the doors 1a and 1b precedes. Such a hook 8 is used.

  The specific configuration of the first locking mechanism (A) is as described above. By rotating the bar 3 with the handle 6 and rotating the handle 6 in a direction approaching the doors 1a and 1b, The receiving member 9 is engaged, and the handle 6 is stored in the detachable member 7 while maintaining this state. Of course, the doors 1a and 1b cannot be opened and closed. On the other hand, when the handle 6 is rotated away from the doors 1a and 1b by releasing the detachable member 7, the bar 3 is also rotated, the engagement between the hook 8 and the receiving member 9 is released, and the doors 1a and 1b are released. It can be opened and closed.

  The detachable member 7 is not particularly limited, but a specific example thereof is shown in FIG. The figure is a perspective view showing the handle 6 and the detachable member 7 on the door 1a side, as viewed from the left side of the detachable member 7 when the handle 6 is fixed, and as viewed from the right side when the handle 6 is opened. is there. In the figure, reference numeral 7a denotes an upward receiving portion, and 7b denotes a Z-type rotating member that is rotatably supported by an upper end of the receiving portion 7a. The Z-type rotating member 7b is provided with a stopper 7d at the shaft support portion. This Z-shaped rotating member 7b is generally formed by press working.

  Now, to fix the handle 6 to the door, the handle 6 is fixed by covering the handle 6 by fitting the handle 6 into the receiving portion 7a and rotating the Z-shaped rotating member 7b. In this case, the stopper 7d is in contact with the side surface 7a1 of the receiving portion 7a to prevent the movement of the Z-shaped rotating member 7b.

  On the other hand, when the handle 6 is rotated and the bar 3 is rotated, that is, when the engagement between the hook 8 and the receiving member 9 is released, the Z-type rotating member 7b is rotated upward (arrow y4). Then, the handle 6 is taken out from the receiving portion 7a and used for the rotation of the handle 6 and the bar 3. At this time, the stopper 7d in the Z-shaped rotating member 7b is made so as not to come in contact with the side surface 7a2 on the opposite side of the receiving portion 7a.

  The hook 8 and the receiving member 9 of the first locking mechanism (A) have been described with the hook 8 on the bar 3 and the bar-shaped receiving member 9 on the lower frame 2 in the illustrated example, but are not particularly limited thereto. For example, the receiving member 9 can be attached to the bar 3 on the hook 8 and the lower frame 2.

  The second locking mechanism (B) of the present invention extends the bar 3 on the door a side upward, and when the handle 6 is fixed to the outer surface of the doors 1a and 1b by the detachable member 7, the bar 3 A structure in which the upper end and the door 1b are locked, and on the other hand, when the handle 6 is rotated in a direction away from the door 1a, the bar 3 also rotates together, and the upper end of the bar 3 and the door 1b are unlocked. It is what.

  FIG. 7 is an enlarged front view of a specific second locking mechanism (B), and FIG. 8 is a top view for explaining the main part thereof. That is, a crank 21 is disposed at a right angle to the upper end of the bar 3 and a hinge 22 is rotatably disposed at the tip of the crank 21 with a shaft 23. A hook 24 is provided at the tip of the hinge 22, while the door 1b. A receiving member 25 that engages with the hook 24 is provided on the side. Preferably, a control member 26 that prevents excessive movement of the hinge 22 is formed on the door 1a side and disposed outside the hinge 22.

  When the handle 6 is fixed to the detachable member 7, the hook 24 at the tip of the hinge 22 engages with the receiving member 25 on the door 1b side and is pulled by the hinge 22, so that the doors 1a and 1b can be opened. become unable. As shown in FIG. 8, the bar 3 is preferably arranged slightly away from the outer surface of the door 1a. When the handle 6 is fixed to the door 1a in this way, the crank 21 is It is set to be located slightly inside (door 1a side) from the bar 6. Therefore, since the hinge 22 is fixed inside the shaft 23, there is no possibility that the hinge 22 will open.

  On the other hand, when the handle 6 is rotated in a direction away from the door 1a, the bar 3 is also rotated (arrow y5) along with this, as shown in FIGS. 9 to 10, and the hinge 22 is connected to the receiving member 25. On the other hand, after passing through the farthest position, it moves in a direction away from the receiving member 25 (arrow y6), and the engagement between the two is inevitably released.

  That is, when the handle 6 of the door 1a is rotated away from the door 1a, the first and second locking mechanisms (A, B) described here are disengaged from the hook and the receiving member. Is done. On the other hand, when the handle 6 is rotated and brought close to the door 1a, the bar 3 is also rotated at the same time, the hook is gradually engaged with the receiving member, and finally the engagement between the two becomes complete, and the doors 1a and 1b are opened. become unable.

  The second locking mechanism (B) is composed only of the outer surfaces of the doors 1a and 1b. For this reason, in loading wastes and the like, even if waste materials or steel materials cover the upper sides of the doors 1a and 1b, they can be opened and closed regardless of this, and the effect is remarkably great.

  Although the doors 1a and 1b are completely opened and closed by the present invention, it is necessary to avoid the doors 1a and 1b from being deformed due to a large amount of waste or the like being packed in the container or applying a large external pressure. However, since the hinge 22 exists over both the doors 1a and 1b, there is no possibility of this. Of course, as a precaution, it is also effective to provide the third locking mechanism (C) as described in the section of the prior art.

  The present invention has the above-described configuration, and the container opening / closing mechanism includes the locking mechanisms (A, B) above and below the door, and can be reliably opened and closed with one touch by rotating the handle. Of course, it is used for containers that transport waste and garbage generated from factories and various work / construction work sites. Needless to say, the present invention can be applied to the opening and closing of the rear doors of various vehicles that carry the luggage.

FIG. 1 is a front view of a conventional container rear door opening / closing mechanism. FIG. 2 is a partially enlarged view of a conventional container rear door opening / closing mechanism. FIG. 3 is a front view of the opening / closing mechanism for the container rear door according to the present invention. FIG. 4 is a side view of the first locking mechanism (A) of the present invention. FIG. 5 is a cross-sectional view of the main part of the first locking mechanism (A) of FIG. FIG. 6 is a perspective view of the handle portion of the first locking mechanism (A). FIG. 7 is an enlarged front view of the second locking mechanism (B) of the present invention. FIG. 8 is a top view of the main part of the second locking mechanism (B).

Explanation of symbols

1 container 1
1a, 1b door,
2 Bottom frame,
3 Bar material,
5 flange,
6 Handle,
7 Detachable member,
8 hooks,
9 receiving member,
21 cranks,
22 Hinge,
24 hooks,
25 receiving member,
26 motion control member,
A first locking mechanism,
B Second locking mechanism.

Claims (7)

  A bar is attached to the outer surface of each of the rear doors a and b that opens and closes to the left and right of the rear surface of the container, etc., and is attached to the bar with a handle that extends in the lateral direction. When the handle is fixed to the outer surfaces of the rear doors a and b, the lower end of the bar is locked with the lower frame of the container and the bar is rotated away from the outer surfaces of the rear doors a and b. The first locking mechanism (A) that unlocks the lower end of the bar and the lower frame of the container, etc., and the bar on the rear door a side are extended upward, and are attached to the outer surfaces of the rear doors a and b. When the handle is fixed, the upper end of the bar and the upper end of the rear door b are locked. When the handle is rotated away from the outer surface of the rear door a, the upper end of the bar and the rear door b are An opening / closing mechanism for a rear door such as a container, comprising: a second locking mechanism (B) for releasing the locking with the upper end.   2. The container according to claim 1, wherein the first locking mechanism (A) has a lower end of the bar material that reaches the lower frame of the container, the bar material is provided with a hook, and the lower frame is provided with a receiving member that engages with the hook. Opening and closing mechanism of the rear door.   The second locking mechanism (B) has a crank mechanism at the upper end of the bar, a hook at the tip of the hinge of the crank mechanism, and a receiving member that engages with the hook on the rear door b side. A mechanism for opening and closing a rear door such as the container described in 1.   4. A mechanism for opening and closing a rear door such as a container according to claim 3, wherein the crank mechanism includes a crank portion extending perpendicularly to the upper end of the bar, a hinge rotatably mounted on the crank portion, and a hook formed on the tip of the hinge. .   The opening / closing mechanism for a rear door such as a container according to any one of claims 1 to 4, wherein a control member for preventing excessive movement of the hinge from the door a is disposed substantially outside the center of the hinge.   The opening / closing mechanism for a rear door such as a container according to claim 4 or 5, wherein when the handle provided on the bar is fixed to the rear door a surface, the hinge is housed on the door side of the bar.   The opening / closing mechanism of a rear door such as a container according to any one of claims 1 to 6, wherein the handle is fixed to the outer surface of each of the rear doors a and b by a detachable fixing device with the opening / closing mechanism locked.

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