JP2020111199A - Safety apparatus - Google Patents

Abstract

To improve operability of a safety apparatus of a door accompanying opening/closing operation of the door.SOLUTION: During closing operation of a door, when a stopper receiver part 41 is inserted into a space part 25, the state that a stopper part 61 is inserted in an opening 49 of the stopper receiver part 41 is held by self weight, the stopper receiver part 41 is locked, and a closed state of the door is held. On the other hand, prior to the door opening operation, an operator operates a second claw part 67, so that the stopper part 61 leaves the opening 49, the stopper receiver part 41 is pulled out of the space part 25, and the door is opened. During the closing operation of the door, as the door is closed, the stopper receiver part 41 is automatically locked to the stopper part 61, so that closing work load on the operator is reduced. During the opening operation of the door, the operator operates the operation part and can easily unlock the stopper receiver part 41, so that work load on the operator as the door opening operation is performed is reduced.SELECTED DRAWING: Figure 8

Description

The present invention relates to a door safety device provided in a cargo box for cargo.

2. Description of the Related Art Conventionally, a kannon door has been used as a door provided in various cargo boxes for cargo such as containers and van bodies of trucks. By the way, at the time of opening the door, when the container, the truck, or the like stops on a slope or a windy place, the door may be inadvertently opened. For this reason, the double door is provided with a safety device for preventing unintended opening of the door.

For example, the one described in Patent Document 1 is fixed to one of the doors, and a retaining plate whose tip extends to the other door in parallel with the door is provided on a pair of protrusions of a bracket provided on the other door. The attached retaining pins prevent the door from being opened accidentally by being pressed down from the outside of the door.

JP, 2013-119735, A

However, in the safety device as described above, it is necessary to attach/detach the retaining pin to/from the pair of protrusions of the bracket each time the door is opened/closed, but the opening/closing work is complicated in some situations, and there is room for improvement. It was

The present invention has been made in view of the above problems, and an object of the present invention is to improve the operability of a door safety device that accompanies opening and closing operations of a door.

(Aspect of the invention)
The following aspects of the invention exemplify the aspects of the present invention and are described by itemizing them in order to facilitate understanding of various components of the present invention. Each of the following items does not limit the technical scope of the present invention, while referring to the best mode for carrying out the present invention, a part of the components of each item is replaced, deleted, or further An aspect in which other constituent elements are added can also be an aspect of the present invention.

(1) A safety device for holding a gannon door provided in a luggage box in a closed state, the space portion being formed on the lower beam of the container and having an opening window on a side surface of the lower beam in the closed state of the door. Between the lock receiving position that extends from near the lower end of the door and the lock position that is inserted into the opening formed in the stopper receiving part in the space and the lock release position that is released from the opening. And a displaceable stopper portion and an operation portion for performing a disengagement operation of the stopper portion with respect to the opening portion, wherein the stopper portion is the space portion when the door is closed. A safety device that is inserted into the opening of the stopper receiving portion when the stopper receiving portion is inserted into the space (claim 1).

The safety device according to this paragraph, in the closed state of the door, has a stopper receiving portion that extends from the vicinity of the lower end of the door toward the space portion that is formed on the lower beam of the container and has an opening window on the side surface of the lower beam, , A stopper portion that is displaceable between a lock position that is inserted into the opening formed in the stopper receiving portion and a lock release position that is separated from the opening portion, and a stopper portion detaching operation with respect to the opening portion. And an operation unit for performing the operation. According to this structure, when the door is closed, the stopper receiving portion engages with the stopper portion while the stopper portion extending from the vicinity of the lower end of the door is inserted into the opening of the stopper receiving portion. Is held in the space and is in a state in which it cannot be pulled out from the space having the opening window on the side surface of the lower beam (that is, the locked state), and the closed state of the door is maintained.
On the other hand, prior to the door opening operation, the operator operates the operation part to displace the stopper part from the lock position to the unlock position, that is, the stopper part separates from the opening of the stopper receiving part, The receiving portion is allowed to be pulled out from the space portion having the opening window on the side surface of the lower beam (that is, the unlocked state), and the door can be opened.
In this way, during the closing operation of the door, the stopper receiving portion is automatically locked by the stopper portion as the door is closed, so that the burden of closing the operator is reduced. Further, when the door is opened, the operator can easily unlock the stopper receiving portion by operating the operation portion, so that the work load on the operator associated with the door opening work is reduced. Will be things.

(2) In the above item (1), when the door is closed, the stopper portion is held in the opening portion of the stopper receiving portion by the weight of the stopper portion itself so as to be held in the lower state. A safety device supported by the beam (Claim 2).

In the safety device according to this item, the stopper portion is supported by the lower beam so that the stopper portion is held in the opening portion of the stopper receiving portion by the weight of the stopper portion itself when the door is closed. .. With this configuration, the stopper portion is maintained in the inserted state in the opening portion of the stopper receiving portion by its own weight, and the stopper receiving portion and the stopper portion are engaged with each other. As a result, the stopper receiving portion is locked and the closed state of the door is maintained.

(3) In the above item (1) or (2), the stopper portion intersects a shaft extending in parallel and horizontally with a door surface in the closed state of the door in the space portion and the opening portion of the stopper receiving portion. Is pivotally supported by the shaft at a position where the first claw is inserted into or removed from the opening by a rotational movement around the shaft, and is pivotally supported by the shaft at a position separated from the stopper receiving part. A second pawl portion, the opening portion is formed in the stopper receiving portion, and the operation portion is constituted by the second pawl portion (claim 3).

In the safety device according to this section, the first claw portion of the stopper portion is normally in a state of being extended downward by its own weight from an axis extending in parallel and horizontally with the door surface in the closed state of the door due to its own weight. Then, when the door is closed, the stopper receiving portion is inserted into the space portion from the opening window provided on the side surface of the lower beam, so that the first claw portion is pushed by the stopper receiving portion and the center of the packing box is pushed. Rotate around the axis in the direction. As the door closing operation progresses, the insertion amount of the stopper receiving portion into the space increases, so that the stopper receiving portion increases the rotation angle around the axis of the first pawl portion toward the center of the packing box. I will do it. Then, the first claw portion is pushed up by the stopper receiving portion and rides on the stopper receiving portion. Furthermore, when the amount of insertion of the stopper receiving portion into the space increases, the first claw portion approaches the opening formed in the stopper receiving portion. Since the first claw portion is pivotally supported by the shaft at the position intersecting the opening of the stopper receiving portion, the first claw portion is retracted into the opening of the stopper receiving portion by its own weight. Then, the first claw portion hangs in the opening of the stopper receiving portion, and the stopper receiving portion and the first claw portion are in a locked state.
In addition, since the second claw portion that constitutes the operation portion is pivotally supported by the shaft at a position where it is disengaged from the stopper receiving portion, the operator manually moves from the open window provided on the side surface of the lower beam to the space portion. Etc. are inserted and the second claw portion is pushed toward the center of the packing box, whereby the shaft rotates. With the rotation of this shaft, the first claw portion rotates toward the center of the luggage box, so that the first claw portion is retracted into the opening of the stopper receiving portion and hangs down inside the opening of the stopper receiving portion. From the locked state, the unlocked state is released from the opening. Therefore, prior to the door opening operation, the operator pushes the second claw portion toward the center of the packing box and removes the first claw portion from the opening of the stopper receiving portion, by performing a so-called unlock operation, The locked state of this safety device is released, and the door can be opened.

(4) In the above item (3), the stopper receiving portion is a joint portion that is joined near the lower end of the door, and an insertion portion that extends from the joint portion and is inserted into the space portion on the side surface of the lower beam. In the closed state of the door, the opening of the stopper receiving portion has a dimension in a direction orthogonal to the axis larger than a rotation locus of the first pawl portion around the axis. A safety device (claim 4) provided within a range that does not hinder the pivotal movement of the packing box toward the center.

In the safety device according to this paragraph, the stopper receiving portion is joined to the vicinity of the lower end portion of the door by the joining portion and is integrated with the door. Then, when the door is closed, the first claw portion of the stopper portion is pushed toward the center portion of the packing box by the insertion portion that extends from the joint portion and is inserted into the space portion on the side surface of the lower beam. ) The action of the term will occur.
Further, the opening of the stopper receiving portion has a dimension in a direction orthogonal to the axis larger than the rotation locus of the first claw portion around the axis, and the movement of the opening toward the center of the luggage box in the closed state of the door. The lock operation and the unlock operation described in the above item (3) are performed without hindering the operation of the first claw portion.

(5) In the above item (3) or (4), the shaft is located above the stopper receiving part in the closed state of the door in the space part, and the first claw part is formed by its own weight by the weight. A safety device that hangs downward from an axis, and its lower end is located below the lower edge of the open window of the space formed on the side surface of the lower beam (claim 5).

In the safety device according to this paragraph, the shaft is located above the stopper receiving portion in the closed state of the door in the space portion, and the first claw portion hangs downward from the shaft due to its own weight. The action of the item (3) is obtained. Further, since the lower end of the first claw is located below the lower edge of the open window of the space formed on the side surface of the lower beam, the first claw rotates toward the outside of the packing box. Even if it moves, it comes into contact with the lower edge of the open window of the space formed on the side surface of the lower beam, so that rotation (rotation) at a further angle is prevented. That is, the position where the lower beam is in contact with the lower edge of the open window of the space becomes the outer limit rotation position of the lower beam. Here, when the stopper receiving portion and the first pawl portion are in a locked state, the first pawl portion is retracted into the opening of the stopper receiving portion due to its own weight. In this state, the first claw portion hangs in the opening of the stopper receiving portion, but when the door is opened, the stopper receiving portion is outside the space from the opening window provided on the side surface of the lower beam. When pulled out to, the end edge portion of the opening of the stopper receiving portion on the center side of the luggage box abuts on the first pawl portion, and the first pawl portion is pushed by the stopper receiving portion toward the outside of the space. Then, the rotation operation of the first claw portion is hindered at the rotation limit position described above, and prevents the stopper receiving portion from being pulled out to the outside of the space portion. That is, unless the operator intentionally performs the unlocking operation described above, the locked state is maintained and the door opening operation is blocked even if the door opening operation occurs.

With the above-described configuration, the present invention can improve the operability of the door safety device that accompanies the opening/closing operation of the door.

It is a figure which shows the container which concerns on one Embodiment of this invention, (a) is a top view of a container, (b) is a left side view of a container, (c) is a right side view of a container. Is. It is a container shown in FIG. 1, (a) is a figure of the front grommet of a container, (b) is a figure of the rear grommet of a container. FIG. 2 is an enlarged view of the safety device shown in FIGS. 1B and 1C. It is sectional drawing which follows the AA line shown in FIG. It is a stopper receiving part shown in FIG. 3, (a) is a front view of a stopper receiving part, (b) is a bottom view of a stopper receiving part, (c) shows in FIG. 5 (a). It is sectional drawing which follows the BB line. It is a stopper part shown in FIG. 3, (a) is a front view of a stopper part, (b) is sectional drawing which follows CC line shown in (a) of FIG. 6, (c) is. It is sectional drawing which follows the DD line shown in FIG.6(a). It is a schematic diagram of a shaft of a stopper part shown in Drawing 6, a 1st claw part, and a 2nd claw part, and (a) is a front view of a shaft of a stopper part, a 1st claw part, and a 2nd claw part, 7B is a rear view of the shaft of the stopper portion, the first pawl portion and the second pawl portion, and FIG. 7C is a sectional view taken along the line EE shown in FIG. It is an operation|movement figure of a safety device, (a) is a figure which shows the locked state of a safety device, (b) is a figure which shows the unlocked state of a safety device.

Hereinafter, the configuration of the safety device according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8. Here, in the following description, a safety device used for a railway container will be described as an example of the safety device.

First, the configuration of the railway container will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1 and FIG. 2, in the railway container 1, one end surface 3 (front end surface) has a wall structure (see FIG. 2A), and the other end surface 5 (rear end surface, figure). 2(b)) and both side surfaces 7L, 7R (see FIGS. 1(b) and 1(c)) have a container body 9 having an opening (not shown) on three sides, and a gannon door provided in the opening. 11L, 11R, 11B (door). In addition, the railway container 1 is provided with safety devices 31L and 31R for preventing unintended opening of the double doors 11L and 11R (see FIGS. 1B and 1C). The gannon doors 11L, 11R, 11B are provided with door lock devices 13L, 13R, 13B for locking the doors 11L, 11R, 11B. The container main body 9 of the railway container 1 is composed of an upper beam 15, a lower beam 17, a pair of front gable columns 19, 19 and a pair of rear gable columns 21, 21. On the side surface of the lower beam 17, insertion portions 23, 23 for inserting a claw (not shown) of a forklift (not shown) are provided, and an opening window located between the insertion portions 23, 23. Space portions 25, 25 having 27, 27 (see FIG. 3) are provided (two in this embodiment, see FIG. 1B and FIG. 1C ).

As shown in FIGS. 1(b) and 1(c), the safety devices 31L and 31R are provided on both sides 7L and 7R of the railway container 1, and the safety devices provided on both sides 7L and 7R. Since 31L and 31R have the same structure, the safety device 31L will be described below as an example, and the description of the safety device 31R will be omitted.
The safety device 31L includes a stopper receiving portion 41, a stopper portion 61, and an operating portion 81. The stopper receiving portion 41 is L-shaped in cross section (see FIG. 5C), and includes a joint portion 43 and an insertion portion 45. One end (tip) of the joining portion 43 is joined near the lower end of the door 11L (see FIGS. 3 and 4). Further, the joint portion 43 is provided with a reinforcing member 47 provided at one end side in the width direction (left side of the paper surface of FIG. 3) and extending in the height direction of the joint portion 43 (vertical direction of the paper surface of FIG. 3 ). The reinforcing member 47 extends in a wedge shape in a manner that the height decreases from the base end (lower side in FIG. 4) of the joint portion 43 toward the distal end (upper side in FIG. 4). The insertion portion 45 has a rectangular shape in a plan view, is formed on the lower beam 17 of the railway container 1 from the other end (base end) of the joint portion 43, and has a space portion having an opening window 27 on a side surface of the lower beam 17. It extends toward 25. The insertion portion 45 has an opening 49 and a reinforcing member 51. The opening 49 has a dimension in a direction orthogonal to a shaft 63 (see below) of the stopper 61 larger than a rotation locus of the first claw portion 65 (see below) of the stopper 61 around the shaft 63, and It is set in a range that does not hinder the pivotal movement of the rail container 1 toward the center when the door 11L is closed (see FIGS. 4 and 5B). The reinforcing member 51 is provided at a position avoiding the opening 49 on the upper surface of the insertion portion 45 so as to connect the joint portion 43 and the insertion portion 45 (see FIG. 5C). Specifically, the reinforcing member 51 is provided on the upper surface of the insertion portion 45 at one end side in the width direction of the insertion portion 45 (on the left side of the paper surface of FIG. 5B), and from the base end to the tip of the insertion portion 45. It extends like a wedge in a manner in which the height decreases toward the bottom (see FIG. 5C).

The stopper portion 61 is provided in the space portion 25 which is formed in the lower beam 17 of the railway container 1 and has the opening window 27 on the side surface of the lower beam 17 (see FIG. 3 ), the shaft 63, the first claw portion 65, and the first claw portion 65. The two-clad portion 67 and the connecting portion 69 are included. The shaft 63 includes a rod-shaped member 71 and a hollow member 73. The rod-shaped member 71 and the hollow member 73 of the shaft 63 extend parallel and horizontally to the door surface in the closed state of the door 11L in the space 25 (see FIG. 3 ), and the stopper receiver in the closed state of the door 11L in the space 25. It is located above the portion 41 (see FIG. 4). The hollow member 73 is rotatably attached to the rod-shaped member 71. The first claw portion 65 has a rectangular shape as viewed from the front, and hangs downward from the hollow member 73 of the shaft 63 by its own weight at a position intersecting the opening 49 of the stopper receiving portion 41 when the door 11L is closed. It is axially supported by the hollow member 73. Further, the first claw portion 65 is provided such that the lower end portion thereof is located below the lower end edge of the open window 27 of the space portion 25 formed on the side surface of the lower beam 17 (see FIG. 4 ). The second pawl portion 67 has a rectangular shape in a front view, and is an operation portion 81 for performing an operation of detaching the first pawl portion 65 from the opening 49 of the stopper receiving portion 41. In the closed state of the door 11L, the second claw portion 67 hangs downward from the hollow member 73 of the shaft 63 by its own weight at a position where it is disengaged from the stopper receiving portion 41, and is pivotally supported by the hollow member 73. The connecting portion 69 has an L-shape when viewed from the rear (see 7(b)), and is used to synchronize and reinforce the rotational movement of the first pawl portion 65 and the rotational movement of the second pawl portion 67. One leg portion 75A forming the L-shape is joined to the first claw portion 65, and the other leg portion 75B is joined to the second claw portion 67 (FIGS. 7A and 7). (See (b)).

Next, the operation of the safety devices 31L and 31R according to the embodiment will be described below with reference to FIG.
In the closing operation of the door 11L, when the door 11L is closed, the insertion portion 45 of the stopper receiving portion 41 is inserted into the space portion 25 from the opening window 27 provided on the side surface of the lower beam 17. By this insertion, the tip of the insertion portion 45 contacts the first claw portion 65, and the amount of insertion of the insertion portion 45 into the space portion 25 increases as the door closing operation of the door 11L progresses. As a result, the first claw portion 65 is pushed by the insertion portion 45, and rotates around the axis toward the center of the railway container 1. Then, the insertion portion 45 is inserted on the back side of the space portion 25 (that is, the center side of the railway container 1), so that the rotation angle around the axis of the first claw portion 65 increases, and the first claw portion 65. Is pushed up by the insertion portion 45 and rides on the insertion portion 45. Then, the first claw portion 65 approaches the opening 49 formed in the stopper receiving portion 41, and the first claw portion 65 is automatically retracted into the opening 49 of the stopper receiving portion 41 by its own weight. As a result, the first claw portion 65 hangs in the opening 49 of the stopper receiving portion 41, and the stopper receiving portion 41 and the first claw portion 65 are engaged with each other (see FIG. 8A). .. As a result, the insertion portion 45 of the stopper receiving portion 41 cannot be pulled out from the space portion 25, and the closed state of the door 11L is maintained.

Here, when the door 11L is unintentionally opened in the closed state of the door 11L, the insertion portion 45 of the stopper receiving portion 41 moves to the outside of the space portion 25 of the lower beam 17 as the door 11L opens. Is pulled out. After that, the end edge portion 49 a of the opening portion 49 of the stopper receiving portion 41 on the center side of the railway container 1 contacts the first claw portion 65. By this contact, the first claw portion 65 is pushed by the stopper receiving portion 41 toward the outer side of the space 25, and the first claw portion 65 rotates toward the outer side of the railway container 1. At this time, since the lower end portion of the first claw portion 65 is located below the lower end edge of the open window 27 of the space 25 of the lower beam 17, the first claw portion 65 is located at the lower edge of the open window 27. Abutment prevents rotation. As a result, the first claw portion 65 is caught by the end edge portion 49a of the opening 49 of the stopper receiving portion 41 on the center side of the railway container 1, and the insertion portion 45 is prevented from being pulled out to the outside of the space portion 25. As a result, an unintended door opening operation of the door 11L is prevented.

On the other hand, when the door 11L is opened (door opening operation), the door lock device 13L (see FIG. 1(b)) is unlocked when the door 11L is closed. After that, the operator inserts a hand or a tool into the space 25 from the opening window 27 provided on the side surface of the lower beam 17 and pushes the second claw 67 toward the center of the railway container 1 (Fig. 8(b)). As a result, the second claw portion 67 rotates toward the center of the railway container 1, and by this rotation, the first claw portion 65 also rotates toward the center of the railway container 1. That is, since the first claw portion 65 is connected to the second claw portion 67 by the connecting portion 69, the second claw portion 67 rotates to rotate in synchronization with the rotation of the second claw portion 67. It moves and is rotated at a rotation angle equivalent to the rotation angle of the second claw portion 67. Then, by the rotation of the first pawl portion 65, the first pawl portion 65 is retracted from the opening 49 of the stopper receiving portion 41 to the state in which the first pawl portion 65 is retracted from the opening 49 ( The lock is released). Then, by pulling out the insertion portion 45 of the stopper receiving portion 41 from the space portion 25, the door 11L is opened.

As described above, according to the safety devices 31L and 31R of the embodiment having the above configuration, the following operational effects can be obtained.
During the closing operation of the doors 11L and 11R, when the insertion portion 45 of the stopper receiving portion 41 is inserted into the space portion 25 having the opening window 27 on the side surface of the lower beam 17, the first claw portion 65 of the stopper portion 61 serves as a stopper. It is inserted into the opening 49 of the receiving portion 41, and is held in the opening 49 by the weight of the first claw portion 65 itself. As a result, the stopper receiving portion 41 is locked, and the closed state of the doors 11L and 11R is maintained. On the other hand, prior to the door opening operation of the doors 11L and 11R, the operator operates the operation portion 81 (second claw portion 67), whereby the first claw portion 65 separates from the opening 49 of the stopper receiving portion 41, The stopper receiving portion 41 is allowed to be pulled out from the space 25, and the doors 11L and 11R can be opened.
As described above, when the doors 11L and 11R are closed, the stopper receiving portion 41 is automatically locked by the stopper portion 61 as the doors 11L and 11R are closed, so that the operator's burden of closing work is reduced. It becomes possible. Further, when the doors 11L and 11R are opened, the operator can easily unlock the stopper receiving portion 41 by operating the second claw portion 67. It is possible to reduce the work load of.

Further, in the safety devices 31L and 31R, the opening 49 of the stopper receiving portion 41 has a dimension in a direction orthogonal to the shaft 63 (the rod-shaped member 71 and the hollow member 73) that rotates about the shaft 63 of the first claw portion 65. It is larger than the locus (see FIG. 4), and is set in a range that does not hinder the pivoting operation of the railway container 1 toward the center when the doors 11L and 11R are closed, so that the operation of the first claw portion 65 is hindered. It is possible to appropriately perform the lock operation and the lock release operation without being locked.

Further, in the safety devices 31L and 31R, the pivotal movement of the first claw portion 65 toward the outside of the railway container 1 is blocked by the lower edge of the open window 27 of the space 25 of the lower beam 17, so that the stopper portion is formed. The engagement state between 61 and the insertion portion 45 of the stopper receiving portion 41 is maintained, and it is possible to prevent the stopper receiving portion 41 from being pulled out to the outside of the space portion 25. As a result, unless the operator intentionally performs the unlocking operation, even if the doors 11L and 11R are closed, the locked state is maintained, and the doors 11L and 11R can be prevented from opening. Become.

Although the safety devices 31L and 31R according to the embodiment are provided on both side faces 7L and 7R, they may be provided on the rear end face 5 side. Further, the safety devices 31L and 31R are used for the three-way open railway container 1, but either one of the rear end face 5 and both side faces 7L and 7R has a two-way open railway container or both sides. The present embodiment is also applicable to other railway containers with different arrangements of openings, such as a two-way open railway container having openings only on the surfaces 7L and 7R, and a one-way opening container having only the rear end surface 5 having openings. Can be applied. The safety devices 31L and 31R according to the embodiment include 31ft. Class container, 40 ft. A long container such as a class container and 12 ft. Class container, 20 ft. It can be applied to railway containers with different lengths, such as short containers such as class containers. Furthermore, the safety devices 31L and 31R are not limited to rail containers, but may be applied to various cargo boxes for cargo such as truck van bodies.

In the safety devices 31L and 31R according to the embodiment, the first pawl portion 65 is a plate-shaped member having a rectangular shape in front view, but the first pawl portion 65 can be inserted into and removed from the opening 49 of the stopper receiving portion 41. As long as the lower end portion of the one claw portion 65 is located below the lower end edge of the open window 27 of the space portion 25 of the lower beam 17, another shape such as a triangular shape or a trapezoidal shape when viewed from the front may be used. Further, the second claw portion 67 is a plate-shaped member having a rectangular shape in a front view, but may have another shape such as a triangle or a trapezoid in a front view as long as it can be pushed by a hand or a tool.

Further, in the safety devices 31L and 31R according to the embodiment, the first pawl portion 65 is held in the opening 49 by the weight of the first pawl portion 65 itself in the closed state of the door 11L. It may be held in the opening 49 by using an elastic member such as rubber. In this configuration, when the doors 11L and 11R are closed, the first pawl portion 65 is held in the opening 49 by the urging force of the elastic member such as a spring or rubber, and the stopper receiving portion 41 and the first pawl portion 65 are formed. Is engaged and locked. At this time, the insertion portion 45 of the stopper receiving portion 41 cannot be pulled out from the space portion 25, and the closed state of the doors 11L and 11R is maintained. On the other hand, when opening the doors 11L and 11R, the operator inserts a hand, a tool, or the like into the space 25 from the opening window 27 provided on the side surface of the lower beam 17, and sets the second claw 67 in the railway container 1 When pushed toward the center of the railway container 1, the first claw portion 65 is rotated toward the center of the railway container 1 against the biasing force of the elastic member such as the spring and the rubber. As a result, the first pawl portion 65 is separated from the opening 49, and the doors 11L and 11R are opened by pulling out the insertion portion 45 of the stopper receiving portion 41 from the space 25.

In the safety devices 31L and 31R according to the embodiment, the shaft 63 (the rod-shaped member 71 and the hollow member 73) of the stopper portion 61 is located above the stopper receiving portion 41 in the closed state of the door 11L in the space portion 25, and The claw portion 65 and the second claw portion 67 are provided so as to hang downward from the shaft 63 (hollow member 73). However, the shaft 63 (the rod-shaped member 71 and the hollow member 73) of the stopper portion 61 is located in the lower portion of the space portion 25, that is, below the stopper receiving portion 41 in the closed state of the door 11L in the space portion 25, and the first claw is provided. The portion 65 and the second pawl portion 67 may be configured to stand upright from the shaft 63 (hollow member 73). At this time, the upper end of the first claw portion 65 is provided so as to be located above the upper edge of the open window 27 of the space 25, and the upper end of the second claw 67 is opened at the open window 27 of the space 25. It is provided so as to be located above the lower edge of the. As a result, when the first claw 65 is rotated toward the outside of the railway container 1, the first claw 65 comes into contact with the upper edge of the open window 27 to prevent the rotation. Further, the operator can insert a hand or a tool into the space 25 from the opening window 27 provided on the side surface of the lower beam 17 and push the second claw 67 toward the center of the railway container 1. It will be possible.

Further, the opening 49 of the stopper receiving portion 41 has a rectangular shape in plan view, but is larger than the rotation locus of the first pawl portion 65 around the shaft 63, and the doors 11L and 11R are closed. Other shapes such as an elliptical shape set within a range that does not hinder the pivotal movement toward the center may be adopted.

DESCRIPTION OF SYMBOLS 1... Rail container (packing box), 11L, 11R... Door (Guanyon door), 17... Lower beam, 25... Opening part, 27... Opening window part, 31L, 31R... Safety device, 41... Stopper receiving part, 61... Stopper part, 81... operation part,

Claims (5)

A safety device for holding a double door provided in a packing box in a closed state,
In a closed state of the door, a stopper receiving portion extending from a vicinity of a lower end of the door toward a space portion formed on the lower beam of the container and having an opening window on a side surface of the lower beam,
In the space, a stopper portion displaceably provided between a lock position inserted into the opening formed in the stopper receiving portion and a lock release position separated from the opening,
An operation portion for performing an operation of separating the stopper portion from the opening portion,
The safety is characterized in that the stopper portion is inserted into the opening portion of the stopper receiving portion in the space portion when the stopper receiving portion is inserted into the space portion when the door is closed. apparatus. The stopper portion is supported by the lower beam so that when the door is closed, the stopper portion holds the insertion portion in the opening of the stopper receiving portion by its own weight. The safety device according to claim 1. The stopper portion, in the space portion, a shaft extending in parallel and horizontally to the door surface in the closed state of the door,
A first pawl portion axially supported by the shaft at a position intersecting with the opening of the stopper receiving portion, and insertable or removable with respect to the opening by rotational movement around the axis; and the stopper receiving portion. A second pawl portion pivotally supported by the shaft at a position away from the opening, the opening is formed in the stopper receiving portion, and the second pawl portion constitutes the operation portion. The safety device according to claim 1 or 2, which is characterized. The stopper receiving portion is a joining portion joined near the lower end of the door,
An insert portion extending from the joint portion and inserted into the space portion on the side surface of the lower beam;
The opening of the stopper receiving portion has a dimension in a direction orthogonal to the axis larger than a rotation locus of the first pawl portion around the axis, and is in the center direction of the luggage box when the door is closed. The safety device according to claim 3, wherein the safety device is provided in a range that does not hinder the rotational movement to the. The shaft is located above the stopper receiving portion in the closed state of the door in the space portion,
The first claw portion hangs downward from the shaft by its own weight, and the lower end portion thereof is located below the lower end edge of the open window of the space formed on the side surface of the lower beam. The safety device according to claim 3 or 4, characterized in that:

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