CN113682668B - Door opening and closing mechanism for container and container with door opening and closing mechanism - Google Patents

Door opening and closing mechanism for container and container with door opening and closing mechanism Download PDF

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Publication number
CN113682668B
CN113682668B CN202011431453.1A CN202011431453A CN113682668B CN 113682668 B CN113682668 B CN 113682668B CN 202011431453 A CN202011431453 A CN 202011431453A CN 113682668 B CN113682668 B CN 113682668B
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CN
China
Prior art keywords
opening
door
outer door
closing mechanism
container
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Application number
CN202011431453.1A
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Chinese (zh)
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CN113682668A (en
Inventor
增永路人
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Boxtix Co ltd
Aichi Ken Ichi
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Boxtix Co ltd
Aichi Ken Ichi
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Publication of CN113682668A publication Critical patent/CN113682668A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/008—Doors for containers, e.g. ISO-containers
    • B65D90/0086—Doors for containers, e.g. ISO-containers rotating or wound around a horizontal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures
    • B65D90/62—Gates or closures having closure members movable out of the plane of the opening
    • B65D90/623—Gates or closures having closure members movable out of the plane of the opening having a rotational motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures
    • B65D90/66—Operating devices therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The utility model provides an opening and closing mechanism of a door capable of safely loading and storing objects to be transported in a container. An opening/closing mechanism (8) of the present utility model is provided in an opening (6 a) formed in at least 1 side wall of a container formed in a box shape so as to open or close the opening, and comprises: an outer door (81) that opens or closes the outside of the opening; and an inner door (82) that is provided so as to be spaced apart from the outer door by a predetermined distance so as to open or close the inside of the opening, wherein the inner door is provided at the following position: when the outer door is rotated outward in a state in which the opening is closed, the upper edge of the outer door is brought into contact with the inner surface of the outer door, and the inner door is configured such that the distance between the contact position (82 b) and the center of the support shaft supporting the rotation of the outer door is one half or less of the distance between the contact position and the lower edge of the outer door.

Description

Door opening and closing mechanism for container and container with door opening and closing mechanism
Technical Field
The present utility model relates to a container.
And more particularly, to an opening and closing mechanism for a door capable of safely loading and storing objects to be transported, particularly powder and granular materials, in a container, and a container having the opening and closing mechanism for the door.
Background
Conventionally, as a method for transporting a powder or granular material such as wood particles, there is a method for transporting a bulk container using a box container.
The bulk container is transported by, for example, providing an inner bag in a box container mounted on a vehicle, filling the inner bag with powder and granules, and after the container reaches a destination, mounting the container on a loading table having a tilting device, tilting the container, and discharging the powder and granules from a powder and granules discharge port provided at a position which becomes a lower end of the inner bag when the container is tilted.
An example of such a container is disclosed in patent document 1.
For example, japanese unexamined patent publication No. 63-131992 (patent document 1) proposes a bulk container that can smoothly discharge cargo, and that can safely discharge cargo without being likely to spill from the side when discharging the cargo.
The bulk container is provided with an opening and closing door, the lower end of the opening and closing door is fixed below the rear plate in a freely rotating way,
an end of a rope (wire) which can be wound freely is fixed above the opening and closing door by a winch,
a canvas for preventing the cargo from being scattered is arranged between the side part of the opening and closing door and the side part of the opening corresponding to the opening and closing door,
and a guide plate rotatably fixed at the lower end thereof to the opening/closing door side of the floor part, the guide plate being provided between the inner surface of the opening/closing door and the floor surface when the opening/closing door is horizontally opened.
Prior art literature
Patent literature
Patent document 1: japanese Kokai publication Sho-63-131992 (claims for utility model registration, FIGS. 1 to 3)
Disclosure of Invention
Problems to be solved by the utility model
A conventional bulk container and the like for transporting powder and granular materials require manual opening and closing of a rear opening and closing door.
Thus, there is a problem in terms of safety.
The bulk container described in patent document 1 is configured to open and close an opening/closing door by unwinding and winding a rope by a winch provided above the opening/closing door.
Therefore, since the winch needs to be operated when opening and closing the opening and closing door, further improvement is required in terms of further smoothly and easily opening and closing the opening and closing door.
In view of the above-described circumstances, the present utility model is to provide an opening/closing mechanism for a door capable of safely loading and storing objects to be transported, particularly powder particles, in a container, and a container having the opening/closing mechanism for the door.
Solution for solving the problem
The utility model according to claim 1 of the present utility model is an opening/closing mechanism for a container, which is provided in an opening of at least 1 side wall formed in a box-shaped container formed by an upper wall, a side wall, and a bottom wall, in order to open or close the opening,
the opening and closing mechanism is characterized in that,
the opening and closing mechanism includes: an outer door that opens or closes the outside of the opening; and an inner door provided to be spaced apart from the outer door by a predetermined distance so as to open or close the inner side of the opening portion,
the outer door is configured such that an upper end edge thereof is rotatably supported in the up-down direction by a side wall at or near an upper end of the opening, and a lower end side thereof is a free end portion,
the inner door is configured such that a lower end edge thereof is rotatably supported by a bottom wall in the up-down direction, and an upper end side thereof is a free end portion and is provided at the following position: when the outer door is rotated outward in a state in which the opening is closed, an upper edge of the outer door is in contact with an inner surface of the outer door, and the inner door is configured such that a distance between a contact position of the inner door with the inner surface of the outer door and a center of a support shaft supporting rotation of the outer door is equal to or less than a half of a distance between a contact position of the inner door with the inner surface of the outer door and a lower edge of the outer door.
According to the opening and closing mechanism of claim 1,
the utility model according to claim 2 of the present utility model is characterized in that,
the outer door is configured to satisfy the following formula (1).
mg≥(d1×d2×f1)/(D1×D2)···(1)
m: mass of outer door [ kg ]
g: gravitational acceleration [ m/s ] 2 ]
d1: distance [ m ] between position of support shaft for supporting inner door and position applied by pressing force based on load of conveyed object
d2: distance [ m ] between position of support shaft supporting outer door and position of applying force from inner door
D1: distance [ m ] between position of supporting shaft for supporting inner door and position of inner door abutting against inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f1: pressing force [ N ] based on load of conveyed object
According to the opening and closing mechanism of claim 1,
the utility model according to claim 3 of the present utility model is characterized in that,
a gap of a desired size is formed between the periphery of the opening and the periphery of the outer door, and a seal or gasket is mounted in the gap.
According to the opening and closing mechanism of claim 3,
the utility model according to claim 4 of the present utility model is characterized in that,
the seal or gasket is mounted in the gap so as to be sandwiched between an inner peripheral surface of the opening portion and an outer peripheral surface of the outer door.
According to the opening and closing mechanism described in claim 3 or 4,
the utility model according to claim 5 of the present utility model is characterized in that,
the pad is formed in a sheet shape.
According to the opening and closing mechanism described in claim 3 or 4,
the utility model according to claim 6 of the present utility model is characterized in that,
the seal has a support portion for securing the seal between the opening and the outer door.
The opening/closing mechanism according to any one of claims 1 to 6,
the utility model according to claim 7 of the present utility model is characterized in that,
a support member protruding from an upper end of the opening toward an inner side of the inner door, the support member abutting against an upper end of the inner door to support the inner door in a raised state,
the support member is configured such that,
the support member has a magnet that contacts or separates from the inner door, and the inner door is attracted by a magnetic force generated between the inner door and the magnet to contact the inner door.
The opening/closing mechanism according to any one of claims 1 to 7,
the utility model according to claim 8 of the present utility model is characterized in that,
the opening is formed to occupy one quarter to one ninth of the lower end portion of the side wall.
The opening/closing mechanism according to any one of claims 1 to 8,
the utility model according to claim 9 of the present utility model is characterized in that,
the opening is formed in a side wall on the rear end side.
The utility model according to claim 10 of the present utility model is a container, characterized in that,
the container has an opening and closing mechanism according to any one of claims 1 to 9.
ADVANTAGEOUS EFFECTS OF INVENTION
An opening/closing mechanism according to the present utility model is an opening/closing mechanism for opening/closing an opening formed in at least 1 side wall of a container formed by forming a box shape from an upper wall, side walls, and bottom wall, the opening/closing mechanism including: an outer door that opens or closes the outside of the opening; and an inner door provided so as to open or close the inside of the opening portion from the outer door to the inside by a predetermined distance, wherein the outer door is configured such that an upper end edge thereof is rotatably supported in the up-down direction by a side wall at or near an upper end of the opening portion, and a lower end side thereof is a free end portion, the inner door is configured such that a lower end edge thereof is rotatably supported in the up-down direction by a bottom wall, and an upper end side thereof is a free end portion, and the inner door is provided at a position where: when the outer door is rotated outward in a state in which the opening is closed, the upper edge of the outer door is brought into contact with the inner surface of the outer door, and the inner door is configured such that the distance between the contact position of the inner door with the inner surface of the outer door and the center of the support shaft supporting the rotation of the outer door is one half or less of the distance between the contact position of the inner door with the inner surface of the outer door and the lower edge of the outer door.
Therefore, according to this opening and closing mechanism, the pressing force by the load of the object to be conveyed is transmitted more reliably as a force smaller than the force originally transmitted at the lower end portion of the outer door.
Accordingly, since the outer door as the opening/closing door is easily locked, the loaded and stored objects can be easily and safely discharged from the container having the opening/closing mechanism.
This effect is remarkable when the object to be conveyed is a powder or granule.
In the opening/closing mechanism, the outer door may be configured to satisfy the following expression (1).
According to such a structure, the closing of the outer door can be locked simply and firmly without using a locking unit.
Further, the lock release of the closing of the outer door and the opening of the opening can be performed only by lifting and tilting the side of the container opposite to the opening/closing door (the front end side in the case where the opening is formed in the side surface wall on the rear end side), and therefore, the lock release of the closing of the outer door and the opening of the opening can be performed very safely.
mg≥(d1×d2×f1)/(D1×D2)···(1)
m: mass of outer door [ kg ]
g: gravity acceleration [m/s 2 ]
d1: distance [ m ] between position of support shaft for supporting inner door and position applied by pressing force based on load of conveyed object
d2: distance [ m ] between position of support shaft supporting outer door and position of applying force from inner door
D1: distance [ m ] between position of supporting shaft for supporting inner door and position of inner door abutting against inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f1: pressing force [ N ] based on load of conveyed object
In addition to or instead of the case where the outer door is configured so as to satisfy the above formula (1), the opening/closing mechanism may be configured such that a gap of a desired size is formed between the peripheral edge of the opening and the outer door, and a seal is preferably attached to the gap, and the seal preferably has a support portion for fixing the seal between the opening and the outer door, or a gasket is preferably a sheet-shaped gasket.
In the case of such a configuration, the outer door can be locked simply and firmly without using a locking means, and the outer door can be unlocked and the opening of the opening can be performed only by lifting and tilting the container on the side opposite to the opening and closing door (the front end side in the case where the opening is formed in the side wall on the rear end side).
In the opening/closing mechanism, the seal or gasket may be attached to the gap so as to be sandwiched between an inner peripheral surface of the opening and an outer peripheral surface of the outer door.
According to this configuration, since the reaction force (resistance force) generated between the inner peripheral surface of the opening portion and the outer peripheral surface of the outer door acts on the outer door in the direction in which the outer door is closed, the outer door can be prevented from rotating in the opening direction, and the outer door can be locked more reliably without using a locking means.
In the opening/closing mechanism, a support member may be provided so as to protrude from an upper end of the opening portion at a position inside the inner door, the support member being in contact with an upper end portion of the inner door to support the inner door in a raised state, the support member being configured to be in contact with or separated from the inner door, the support member having a magnet, and the inner door being attracted by a magnetic force generated between the inner door and the magnet to be in contact with the inner door.
According to this configuration, the inner door can be held in the raised state in a normal state, and the objects to be transported can be filled in the container, and the inner door can be tilted outward by the pressing force based on the load of the objects to be transported, so that the opening can be opened when the container is tilted to a predetermined angle thereafter.
In the opening/closing mechanism, the opening may be formed in a lower end portion of a side wall of the container, preferably, a rear end side wall, and more preferably, may be formed to occupy a quarter to a ninth of the lower end portion of the side wall.
With this configuration, the objects can be more easily discharged.
The opening and closing mechanism may be provided in an opening formed in at least 1 side wall of a container formed by forming a box shape from an upper wall, a side wall, and a bottom wall.
Drawings
Fig. 1 is a front view showing an example of an opening/closing mechanism provided in an opening portion formed in a side wall on a rear end side of a container as an opening/closing mechanism of the present utility model.
Fig. 2 is a cross-sectional view A-A' of fig. 1.
Fig. 3 is an explanatory view showing a mechanism of the opening and closing mechanism shown in fig. 2, fig. 3 (a) shows a state in which a container not filled with an object to be conveyed is left standing on a horizontal plane and an opening is closed by an inner door and an outer door, fig. 3 (B) shows a state in which the object to be conveyed is filled in the container, whereby the inner door rotates outward and abuts against an inner surface of the outer door closing the opening, fig. 3 (C) shows a state in which the container is in a state in which a front end side thereof is raised and inclined at an angle of about 10 °, fig. 3 (D) shows a state in which the front end side is further raised and inclined at an angle of about 15 °, fig. 3 (E) shows a state in which the front end side is further raised and inclined at an angle of about 20 °, and a state in which the object to be conveyed is completely discharged.
Fig. 4 is a front view showing another example of an opening/closing mechanism provided in an opening portion formed in a side wall on the rear end side of a container as an opening/closing mechanism of the present utility model.
Fig. 5 is an explanatory view schematically showing an example of a seal interposed between the inner peripheral surface of the opening and the outer peripheral surface of the outer door in the opening and closing mechanism shown in fig. 4.
Fig. 6 is an explanatory view showing a mechanism of the opening and closing mechanism shown in fig. 4, fig. 6 (a) shows a state in which a container not filled with an object to be conveyed is left standing on a horizontal plane and an opening is closed by an inner door and an outer door, fig. 6 (B) shows a state in which the object to be conveyed is filled in the container, whereby the inner door rotates outward, and abuts against an inner surface of the outer door closing the opening, fig. 6 (C) shows a state in which the container is in a state in which a front end side thereof is raised and inclined at an angle of about 10 °, fig. 6 (D) shows a state in which the front end side is raised further and inclined at an angle of about 20 °, fig. 6 (E) shows a state in which the front end side is raised further and inclined at an angle of about 30 °, and fig. 6 (F) shows a state in which the front end side is raised further and inclined at an angle of about 33 °, and the object to be conveyed is discharged completely.
Description of the reference numerals
1. A container; 2. a container body; 3. an upper wall; 4. a left side wall; 5. a right side wall; 6. a side wall on the rear end side; 6a, an opening; 6b, a support member; 7. a bottom wall; 8. an opening and closing mechanism; 81. an outer door; 81a, 1 st hinge; 81b, 1 st support shaft; 82. an inner door; 82a, support shaft 2; 82b, an abutment; 9. a locking unit; 9a, locking lever; 9b, operating the handle; 10. a seal; 10a, a closing part; 10b, a supporting part; s, gaps; m, a magnet.
Detailed Description
An embodiment of the container of the present utility model will be specifically described below based on the attached drawings.
The present utility model is not limited to the disclosed embodiments, and various modifications can be made without changing the gist thereof.
Fig. 1 is a front view of the rear end side of a container 1 of the present utility model.
The container body 2 constituting the container 1 is not particularly shown, and is formed into a box shape having an elongated shape by the upper surface wall 3, the pair of side walls 4 and 5 on the long side, the pair of side walls on the short side (side wall on the front end side (not shown) and side wall on the rear end side 6), and the bottom surface wall 7, and conforms to ISO (international standardization organization) and CSC (international treaty on the safety of containers) which are references of the international offshore container.
When the container 1 is mounted on a vehicle, the rear end side of the container body 2 is positioned on the rear side.
As shown in fig. 1 and 2, an opening 6a having a desired size (opening dimension) is provided in a side wall 6 on the rear end side of the container body 2, and an opening/closing mechanism 8 capable of opening or closing the opening 6a is provided.
As shown in fig. 1 and 2, the opening/closing mechanism 8 is constituted by an outer door 81 and an inner door 82, wherein the outer door 81 is provided to be rotated in the up-down direction toward the outside in order to open or close the outlet side (outside) of the opening 6a, and the inner door 82 is provided to be disposed at a predetermined interval inside the outer door 81 and is provided to be rotated in the up-down direction toward the outside in order to open or close the inlet side (inside) of the opening 6 a.
In this embodiment, the outer door 81 and the inner door 82 constituting the opening/closing mechanism 8 are each made of a metal material from the viewpoints of strength retention, quality, and the like at the time of use, but an appropriate material can be selected as long as the effect of the present utility model is not impaired.
As shown in fig. 1, the outer door 81 is formed of a rectangular plate-like body in a front view, and as shown in fig. 2, one end side (upper end side in fig. 1 and 2) in the short side direction thereof is rotatably supported by a side wall 6 at or near the upper end of the outlet side of the opening 6a via a hinge (1 st hinge) 81a in an inverted L shape in a side view, and the other end side (lower end side in fig. 1 and 2) is a free end.
In addition, reference numeral 81b is a support shaft (1 st support shaft) as the rotation center of the hinge 81 a.
As shown in fig. 1, a lock unit 9 for locking the closing of the outer door 81 is provided to the outer door 81 to prevent the outer door 81 from being opened accidentally.
In fig. 1, the lock unit 9 is constituted by a lock lever 9a and an operation handle 9b, the lock lever 9a is rod-shaped, extends between the side walls 4 and 5 in the vicinity of the outer door 81, and locks the outer door 81 when the outer door 81 is closed, and the operation handle 9b is attached to the lock lever 9a and rotates by operating the lock lever 9a, thereby locking and unlocking the outer door 81.
The inner door 82 is disposed at a predetermined distance inside the outer door 81, and is formed of a rectangular plate-like body in a front view, and one end side (lower end edge in fig. 2) in the short side direction thereof is rotatably supported by the bottom wall 7 via a hinge (2 nd hinge) (not shown) in the shape of a japanese kana-like v in a side view, and the other end side (upper end side in fig. 1 and 2) is a free end.
Accordingly, the objects to be transported filled in the container 1 are brought into contact with the inner door 82 to press the inner door 82 by the pressing force based on the load of the objects to be transported, but are not brought into contact with the outer door 81, and the outer door 81 is not pressed, so that even when the closing of the outer door 81 is forgotten to be locked, leakage of the objects to be transported from the free end (lower end side in fig. 1 and 2) of the outer door 81 can be prevented or suppressed with a very high probability.
In addition, reference numeral 82a is a support shaft (2 nd support shaft) as a rotation center of the hinge (2 nd hinge).
The size (opening size) of the opening 6a may be appropriately selected depending on the size of the container, etc., and is not particularly limited, but it is preferable that the opening 6a is formed so as to occupy about one fourth to one ninth of the lower end of the side wall forming the opening 6 a.
Accordingly, the outer door 81 and the inner door 82 may be sized to correspond to the opening 6 a.
In fig. 2, the opening 6a is formed such that the inlet side (inner side) and the outlet side (outer side) thereof are about one fourth to one fifth of the outer lower end portion of the side wall 6, and when the opening 6a is formed such that the inlet side (inner side) and the outlet side (outer side) thereof are about one seventh to one ninth of the outer lower end portion of the side wall 6, it is very easy to return the inner door 82 to the vertically upright state after the discharge of the conveyed article is completed.
In the present utility model, as shown in fig. 2, the inner door 82 is configured such that, when the inner door 82 is rotated (tilted) outward in a state where the opening 6a is closed by the outer door 81, an upper edge (abutment 82 b) thereof abuts against an inner surface of the outer door 81.
The contact position is set as follows: the distance between the axial center of the 1 st support shaft 81b and the abutment position is smaller than the distance between the lower end edge of the outer door 81 and the abutment position, and more preferably the following positions are selected: the distance between the axial center of the 1 st support shaft 81b and the abutment position is one half or less of the distance between the lower end edge of the outer door 81 and the abutment position.
According to this configuration, the pressing force by the load of the object to be conveyed can be transmitted as a small force to the lower end portion (the point of action) of the outer door 81, and therefore the closing of the outer door can be easily locked.
That is, the assistance of locking the closing of the outer door is achieved.
In this embodiment, the inner door 82 is disposed such that its upper end edge abuts against the vicinity of the upper end of the inner surface of the outer door 81 when it is rotated (tilted) about 10 ° to the outside.
The mechanism of locking or auxiliary locking by the opening and closing mechanism of such a structure is described below.
In the inner door 82, a 2 nd support shaft 82a (specifically, an axis thereof) supporting the inner door 82 functions as a fulcrum, a position to which a force generated by a load of an object to be conveyed is applied functions as a force point, and a position (an abutting portion 82 b) abutting against an inner surface of the outer door 81 functions as an action point.
In the present utility model, since the fulcrum is located outside and nearer to the force point and the action point, the smaller motion applied to the force point becomes the larger motion at the action point.
Thus, at the point of action, the pressing force based on the load of the conveyed object applied to the point of force is reduced by the lever principle, and transmitted as a force smaller than the pressing force.
Specifically, the relationship d1×f1=d1×f1 (D1 < D1) is established when the distance between the fulcrum and the force point is D1[ m ], the distance between the fulcrum and the action point is D1[ m ], the pressing force of the load based on the conveyed object applied to the force point is F1[ N ], and the force transmitted to the action point is F1[ N ].
On the other hand, in the outer door 81, a 1 st support shaft 81b (specifically, an axial center thereof) disposed at or near the upper end of the opening 6a and supporting the outer door 81 functions as a fulcrum, a position where a force is applied from the inner door 82 (an abutment position where an inner surface of the outer door 81 abuts against the inner door 82) functions as a force point, and a lower end portion of the outer door 81 functions as an action point.
In the present utility model, since the fulcrum is located outside and nearer to the force point and the action point, the smaller motion applied to the force point becomes the larger motion at the action point.
Thus, at the point of action, the force applied to the point of force transmitted from the inner door 82 is reduced due to the principle of leverage, and is transmitted as a force smaller than the force.
That is, the pressing force based on the load of the object to be conveyed is transmitted as a smaller force at the point of action of the outer door 81.
Specifically, if the distance between the fulcrum and the force point is D2 m, the distance between the fulcrum and the action point is D2 m, the force applied to the force point and transmitted from the inner door 82 is F2N, and the force at the action point is F2N, the relationship d2×f2=d2×f2 (D2 < D2) is established.
Here, since f2=f1, (d2×d1×f1)/d1=d2×f2.
Accordingly, in a state where the opening 6a is closed, the pressing force F1 by the load of the object to be conveyed is reduced by the lever principle, and the force F2 of (d2×d1)/(d1×d2) of the pressing force F1 is transmitted to the outside at the lower end portion (the action point) of the outer door 81.
Thus, in the present utility model, even in the case where a less strong locking unit is used for the outer door 81, the closing of the outer door 81 can be reliably locked.
In one embodiment of the present utility model, the mass of the outer door 81 is defined as m [ kg ]]The gravitational acceleration is set as g [ m/s ] 2 ]In this case, F2 may be equal to or less than mg, that is, the following formula (1) may be satisfied.
According to this structure, in a normal case (in a case where the container is in a stationary state), the outer door 81 is not opened by the load of the transported object, and therefore, the container of the present utility model does not need a locking means for locking the closing of the outer door, or only a relatively simple locking means may be attached to the outer door.
Accordingly, the operator can perform the unlocking of the closing of the outer door and the opening of the opening by merely lifting and tilting the side (the front end side in the present embodiment) opposite to the opening/closing door of the container without having to stand before the outer door (opening/closing door), and therefore, the unlocking of the closing of the outer door and the opening of the opening can be performed very safely.
mg≥(d1×d2×f1)/(D1×D2)···(1)
m: mass of outer door [ kg ]
g: gravitational acceleration [ m/s ] 2 ]
d1: distance [ m ] between position of support shaft for supporting inner door and position applied by pressing force based on load of conveyed object
d2: distance [ m ] between position of support shaft supporting outer door and position of applying force from inner door
D1: distance [ m ] between position of supporting shaft for supporting inner door and position of inner door abutting against inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f1: pressing force [ N ] based on load of conveyed object
In fig. 2, a support member 6b is provided to protrude from an upper end of the opening 6a on an inner side of the inner door 82, and the support member 6b abuts against the inner door 82 to restrict inward rotation of the inner door 82, so as to hold the inner door 82 in a state of standing up with respect to the bottom wall 7 (vertically in fig. 2).
The support member 6b is configured to be in contact with the inner door 82 via a magnet M, and as shown in fig. 2, the support member 6b has the magnet M at least on a surface in contact with the inner door 82.
On the other hand, at least a portion of the inner door 82 against which the magnet M abuts is made of a magnetic material so that the inner door 82 is attracted to the support member 6b by a magnetic force generated between the inner door 82 and the magnet M.
Therefore, when the inner door 82 is closed, the magnet M attracts the inner door 82 by its magnetic force, and therefore, even in a state where the object to be conveyed is put in, the support member 6b can be held in an upright state by pulling the inner door 82 in.
The contact surfaces of the inner door 82 and the magnet M are each formed as a smooth surface from the standpoint of rigidity and holding force.
The magnet is not particularly limited as long as it has a property of attracting a magnetic body by magnetization.
As the magnet, for example, a neodymium magnet can be selected.
In addition, the magnetic force of the magnet is preferably configured such that the inner door is attracted by an attraction force, and the inner door is separated by a pressing force based on a load of the object to be conveyed.
According to this configuration, when the container is left standing and is not filled with the object to be transported, the inner door is brought into contact with the support member in a standing state, and when the container is filled with the object to be transported, the inner door is tilted outward by the pressing force based on the load of the object to be transported.
In addition, as long as the effect of the present utility model is not impaired, 1 or more magnets may be disposed with respect to the support member.
For example, as shown in fig. 3, the opening and closing mechanism 8 of the embodiment discharges the conveyed object.
In fig. 3 a, in the container 1, an opening 6a formed in a side wall 6 (in this embodiment, the rear end side) of the container 1 is constituted such that both the outlet side and the inlet side thereof occupy about one fourth to one fifth of the lower end portion of the side wall 6, and the outside of the opening 6a is closed by an outer door 81 and the inside thereof is closed by an inner door 82.
As shown in fig. 3 (a), the container 1 is in a state of standing on a horizontal plane.
As shown in fig. 3 (a), the support member 6b is provided at the upper end of the opening 6a on the inner side of the inner door 82 so as to protrude inward.
More specifically, in fig. 3 (a), the support member 6b is formed of a plate-like body and protrudes downward.
The inner door 82 is restrained from rotating inward by the support member 6b, and is held in a state of standing upright with respect to the bottom wall 7.
In fig. 3 (a), the support member 6b is configured to be in contact with the inner door 82 via a magnet M, that is, to have the magnet M on the side in contact with the inner door 82.
The magnet M attracts the inner door 82 by its magnetic force, but when the object to be transported is put into the container 1 from a put-in port (not shown) provided in the upper surface wall 3 in a state where the outer door 81 is closed and locked, the inner door 82 is configured to be separated from the support member 6B by a pressing force based on a load of the object to be transported, as shown in fig. 3B.
In fig. 3 (B), the pressing force F2 applied from the inside toward the outside with respect to the lower end of the outer door 81 by the load of the object to be transported is set so that F2 is equal to or less than mg when the mass of the outer door 81 is m and the gravitational acceleration is g, and therefore, in the state where the container 1 is left standing on the horizontal plane, the outer door 81 is in the state where the closing thereof is locked, and therefore, is not opened by the load of the object to be transported.
Then, when the side (front end side in this embodiment) of the container 1 opposite to the opening and closing door is lifted, as shown in fig. 3 (C), when the inclination angle of the container 1 reaches about 10 °, the outer door 81 is rotated outward (rearward side in this embodiment) by its own weight.
When the container 1 is further lifted from the state on the side facing the opening/closing door, the opening 6a is opened in association with the rotation of the outer door 81, and when the opening 6a is completely opened, all the objects to be conveyed are discharged (fig. 3D to fig. 3F).
As another embodiment of the present utility model, as shown in fig. 4 and 5, in addition to or instead of the case where the outer door 81 is configured so as to satisfy the above formula (1), a gap S of a desired size is formed between the peripheral edge of the opening 6a and the peripheral edge of the outer door 81, and a seal or gasket can be attached to the gap S.
Even in the case of such a configuration, the same operational effects as those in the case of configuring the outer door 81 so as to satisfy the above formula (1) can be obtained.
As is clear from fig. 4 and 5, the outer door 81 is configured to be small in size relative to the size of the opening 6a, and is configured such that one end side (upper end edge in fig. 4 and 5) in the short side direction thereof is rotatably supported by the side wall 6 above the outlet side of the opening 6a via a hinge 81a having an inverted L shape in side view.
Accordingly, a gap S of a desired size is formed between the inner peripheral surface of the opening 6a and the outer peripheral surface of the outer door 81, and therefore a seal or gasket can be inserted into the gap S.
The seal and gasket are mounted in the gap S so as to be sandwiched between the inner peripheral surface of the opening 6a and the outer peripheral surface of the outer door 81.
The seal and the gasket are made of an elastic body, and are thus compressed between the inner peripheral surface of the opening 6a and the outer peripheral surface of the outer door 81 in the gap S, and are biased toward the inner peripheral surface side of the opening 6a and the outer peripheral surface side of the outer door 81.
The reaction force (resistance force) acts on the outer door 81 and acts in a direction to close the outer door 81.
Accordingly, the reaction force acts as a load, and the outer door 81 is restrained from rotating in the opening direction, so that the outer door 81 can be locked more reliably without using a locking means.
Further, the rotation of the outer door 81 in the opening direction may be performed by lifting and tilting the side of the container 1 opposite to the opening/closing door (the front end side in the case where the opening is formed in the side wall on the rear end side).
The pad is not particularly limited as long as it is configured to generate the reaction force.
The gasket is preferably a sheet-like gasket.
The seal is not particularly limited as long as it is configured to generate the reaction force.
In fig. 4 and 5, the seal 10 is composed of a closing portion 10a and a supporting portion 10b, the closing portion 10a covers a part of the outer surface of the outer door 81 and the outside of the peripheral edge of the opening portion 6a, and the supporting portion 10b is attached to the back surface of the closing portion 10a to fix the seal 10 between the peripheral edge of the opening portion 6a and the outer door 81.
The support portion 10b is made of an elastic body that biases the inner peripheral surface side of the opening portion 6a and the outer peripheral surface side of the outer door 81, and the support portion 10b is sandwiched between the inner peripheral surface of the opening portion 6a and the outer peripheral surface of the outer door 81 in the gap S, and is thus compressed between the inner peripheral surface of the opening portion 6a and the outer peripheral surface of the outer door 81. The reaction force (resistance force) acts on the outer door 81 and acts in a direction to close the outer door 81.
The seal and the gasket may be installed in the gap S so as to generate a reaction force (resistance force) sufficient to close the opening 6a by the outer door 81.
Thus, with respect to the seal and gasket, one or more can be installed in whole or in part of the gap.
In addition, in fig. 4 and 5, the seal 10 is mounted to the entire outer periphery of the outer door 81.
For example, as shown in fig. 6, the conveyance object is discharged by the opening/closing mechanism 8 according to the embodiment.
In fig. 6 (a), in the container 1, an opening 6a formed in a side wall 6 (in this embodiment, the rear end side) of the container 1 is constituted such that both the outlet side and the inlet side thereof occupy about one fourth to one fifth of the lower end portion of the side wall 6, and the outside of the opening 6a is closed by an outer door 81 and the inside is closed by an inner door 82.
As shown in fig. 6 (a), the container 1 is in a state of standing on a horizontal plane.
In fig. 6 (B), a gap S of a desired size is formed between the inner peripheral surface of the opening 6a and the outer peripheral surface of the outer door 81, and the seal 10 is inserted in the entire gap S, that is, along the outer periphery of the outer door 81.
As shown in fig. 6 (a), the support member 6b is provided so as to protrude inward at the upper end of the opening 6a on the inner side of the inner door 82.
More specifically, in fig. 6 (a), the support member 6b is formed of a plate-like body and protrudes downward.
The inner door 82 is restrained from rotating inward by the support member 6b, and is held in a state of standing upright with respect to the bottom wall 7.
In fig. 6B, objects to be transported are put into the container 1 from a feed port (not shown) provided in the upper wall 3 of the container 1 and filled.
When the container 1 is filled with the objects to be transported, as shown in fig. 6 (B), the inner door 82 is separated from the support member 6B by the pressing force based on the load of the objects to be transported.
After the object to be conveyed is filled, the locking means 9 is released as shown in fig. 6 (B).
Since the seal 10 is compressed between the inner peripheral surface of the opening 6a and the outer peripheral surface of the outer door 81 to generate a reaction force (resistance) based on the reaction force, the outer door 81 is in a state where the reaction force is greater than a pressing force based on a load of the object to be conveyed applied to the outer door 81 via the inner door 82 (fig. 6C) →fig. 6D) and in a state where the pressing force is the same as that (fig. 6E), and therefore the outer door 81 is in a state where the closing thereof is locked, and thus is not opened by the load of the object to be conveyed.
Then, when the side of the container 1 opposite to the opening and closing door (front end side in this embodiment) is lifted and the inclination angle of the container 1 reaches a predetermined angle (about 33 ° in fig. 6 (F)), the outer door 81 is rotated outward (rear side in this embodiment) by the pressing and the self weight based on the load of the conveyed object as shown in fig. 6 (F).
When the container 1 is lifted further from this state on the side facing the opening/closing door, the opening 6a is opened in accordance with the rotation of the outer door 81, and when the opening 6a is completely opened, all the objects to be conveyed are discharged (fig. 6G).
In the present embodiment, the opening/closing mechanism 8 is provided in the opening 6a of the side wall 6 formed on the rear end side, but the opening is not limited to the side wall on the rear end side, but 1 or more opening/closing mechanisms may be provided in at least 1 of the side walls constituting the container body, and the opening/closing mechanism may be provided in each opening.
The container of the present utility model can be used for transporting a powder or granular material such as wood particles, but can be used for transporting ordinary cargo.
Industrial applicability
The opening/closing mechanism of the present utility model has a mechanism that can easily lock or assist in locking the closing of the opening/closing door provided on the rear end side of the container, and can easily and safely discharge objects to be transported, particularly powder or granular materials, loaded and stored in the container, and can be applied to all containers.

Claims (9)

1. An opening/closing mechanism for a container, which is provided in an opening formed in a container having a box shape formed by an upper wall, side walls and a bottom wall, for opening or closing the opening of at least 1 side wall,
the opening and closing mechanism is characterized in that,
the opening and closing mechanism includes: an outer door that opens or closes the outside of the opening; and an inner door provided to be spaced apart from the outer door by a predetermined distance so as to open or close the inner side of the opening portion,
the outer door is configured such that an upper end edge thereof is rotatably supported in the up-down direction by a side wall at or near an upper end of the opening, and a lower end side thereof is a free end portion,
the inner door is configured such that a lower end edge thereof is rotatably supported by a bottom wall in the up-down direction, and an upper end side thereof is a free end portion and is provided at the following position: when the inner door is rotated outward in a state in which the opening is closed by the outer door, an upper edge thereof is in contact with an inner surface of the outer door, and the inner door is configured such that a distance between an abutment position of the inner door against the inner surface of the outer door and a center of a support shaft supporting rotation of the outer door is one half or less of a distance between an abutment position of the inner door against the inner surface of the outer door and a lower edge of the outer door,
the outer door is configured to satisfy the following formula:
mg≥(d1×d2×f1)/(D1×D2)
m: mass of outer door [ kg ]
g: gravitational acceleration [ m/s ] 2 ]
d1: distance [ m ] between position of support shaft for supporting inner door and position applied by pressing force based on load of conveyed object
d2: distance [ m ] between position of support shaft supporting outer door and position of applying force from inner door
D1: distance [ m ] between position of supporting shaft for supporting inner door and position of inner door abutting against inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f1: pressing force [ N ] based on the load of the conveyed object.
2. The opening and closing mechanism according to claim 1, wherein,
a gap of a desired size is formed between the periphery of the opening and the periphery of the outer door, and a seal or gasket is mounted in the gap.
3. The opening and closing mechanism according to claim 2, wherein,
the seal or gasket is mounted in the gap so as to be sandwiched between an inner peripheral surface of the opening portion and an outer peripheral surface of the outer door.
4. An opening and closing mechanism according to claim 2 or 3, characterized in that,
the pad is formed in a sheet shape.
5. An opening and closing mechanism according to claim 2 or 3, characterized in that,
the seal has a support portion for securing the seal between the opening and the outer door.
6. The opening and closing mechanism according to any one of claims 1 to 3, wherein,
a support member protruding from an upper end of the opening toward an inner side of the inner door, the support member abutting against an upper end of the inner door to support the inner door in a raised state,
the support member is configured such that,
the support member has a magnet that contacts or separates from the inner door, and the inner door is attracted by a magnetic force generated between the inner door and the magnet to contact the inner door.
7. The opening and closing mechanism according to any one of claims 1 to 3, wherein,
the opening is located at the lower end of the side wall and has a size of one fourth to one ninth of the height of the container.
8. The opening and closing mechanism according to any one of claims 1 to 3, wherein,
the opening is formed in a side wall on the rear end side.
9. A container is characterized in that,
the container has an opening and closing mechanism according to any one of claims 1 to 8.
CN202011431453.1A 2020-05-18 2020-12-07 Door opening and closing mechanism for container and container with door opening and closing mechanism Active CN113682668B (en)

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JP2020086665A JP7083370B2 (en) 2020-05-18 2020-05-18 Door opening / closing mechanism in a container and a container equipped with it

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CN113682668B true CN113682668B (en) 2023-05-12

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Citations (1)

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JPH079832Y2 (en) * 1989-07-07 1995-03-08 三井物産株式会社 Two-stage open / close door structure for transport containers
GB2399336B (en) * 2003-03-12 2006-05-10 Container Exchange Freight container
CN2926118Y (en) * 2006-05-15 2007-07-25 广州德润环保科技发展有限公司 Refuse-unloading shielded gate against pollution
CN201062148Y (en) * 2007-06-15 2008-05-21 中国国际海运集装箱(集团)股份有限公司 Non-pressure dry bulk cargo container
KR100794488B1 (en) * 2007-10-09 2008-01-16 대한통운 주식회사 Container having an unloading appratus
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CN107878947B (en) * 2016-09-30 2020-06-02 南通中集特种运输设备制造有限公司 Locking device, container door structure and container
CN206502229U (en) * 2017-01-10 2017-09-19 胜狮货柜管理(上海)有限公司 A kind of unloading goods inside container door and container
JP6786677B1 (en) * 2019-07-26 2020-11-18 合同会社箱一 container

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JPH0560243A (en) * 1991-08-29 1993-03-09 Hoshizaki Electric Co Ltd Door for pressure reducing container

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