CN113682668A - Opening and closing mechanism for door of container and container having the same - Google Patents

Opening and closing mechanism for door of container and container having the same Download PDF

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Publication number
CN113682668A
CN113682668A CN202011431453.1A CN202011431453A CN113682668A CN 113682668 A CN113682668 A CN 113682668A CN 202011431453 A CN202011431453 A CN 202011431453A CN 113682668 A CN113682668 A CN 113682668A
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CN
China
Prior art keywords
opening
door
outer door
closing mechanism
container
Prior art date
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Granted
Application number
CN202011431453.1A
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Chinese (zh)
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CN113682668B (en
Inventor
增永路人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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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Publication of CN113682668B publication Critical patent/CN113682668B/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 invention provides an opening and closing mechanism of a door capable of safely loading and storing conveyed objects in a container. An opening/closing mechanism (8) according to the present invention is provided in an opening (6a) formed in at least 1 side wall of a container formed in a box shape so as to open or close the opening, the opening/closing mechanism including: 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 inward by a predetermined distance so as to open or close the inside of the opening, the inner door being provided at the following positions: when the inner door is rotated outward in a state where the outer door closes the opening, the upper end edge of the inner door abuts against the inner surface of the outer door, and the inner door is configured such that the distance between the abutting position (82b) and the center of a support shaft that supports the rotation of the outer door is equal to or less than one-half of the distance between the abutting position and the lower end edge of the outer door.

Description

Opening and closing mechanism for door of container and container having the same
Technical Field
The present invention relates to a container.
More particularly, the present invention relates to a door opening/closing mechanism for a container capable of safely loading and storing an object to be transported, particularly, a powder or granule, and a container having the door opening/closing mechanism.
Background
Conventionally, as a method for conveying a powder or granule such as a wooden pellet, there is a method for conveying a bulk container using a box-shaped container.
Such bulk containers are transported by, for example, installing an inner bag in a box container mounted on a vehicle and filling the inner bag with a powder or granular material, and after the container reaches a destination, the box container is mounted on a loading platform having a tilting device, the box container is tilted, and the powder or granular material is discharged from a powder or granular material 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 cargoes, and when the cargoes are discharged, the cargo can be safely discharged without worrying about the cargoes spilling from the side.
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 freely wound rope (wire) is fixed above the opening/closing door by a winch,
canvas for preventing the goods from being scattered is arranged between the side part of the opening/closing door and the corresponding side part of the opening part,
and a guide plate, the lower end of which is fixed on the opening and closing door side of the floor part in a freely rotating way, when the opening and closing door is opened horizontally, the guide plate is erected between the inner side surface of the opening and closing door and the floor surface.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai Sho 63-131992 (utility model registration claims, figures 1-3)
Disclosure of Invention
Problems to be solved by the invention
A box container for transporting powder such as a conventional bulk container requires a rear opening/closing door to be opened/closed manually.
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 it is necessary to operate the winch when opening and closing the opening and closing door, further improvement is required in order to open and close the opening and closing door more smoothly and easily.
In view of the above-described situation, the present invention is intended to provide a door opening/closing mechanism capable of safely loading and storing a material to be conveyed, particularly a powder or granule, in a container, and a container having the door opening/closing mechanism.
Means for solving the problems
The invention described in claim 1 of the present invention is an opening/closing mechanism for a container, which is provided in an opening portion formed in a container having a box-shaped upper wall, side walls, and a bottom wall, in order to open or close the opening portion of at least 1 of the side walls,
the opening and closing mechanism is characterized in that,
the opening and closing mechanism includes: an outer door that opens or closes an outer side of the opening portion; and an inner door provided with a predetermined distance from the outer door to the inner side so as to open or close the inner side of the opening,
the outer door is configured such that an upper end edge thereof is supported by a side wall at or near an upper end of the opening portion so as to be rotatable in a vertical direction, and a lower end side thereof is a free end portion,
the inner door is configured such that a lower end edge thereof is supported by the bottom wall so as to be rotatable in the vertical 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 where the outer door closes the opening, an upper end edge of the inner door abuts against an inner surface of the outer door, and the inner door is configured such that a distance between an abutting position of the inner door with the inner surface of the outer door and a center of a support shaft that supports the rotation of the outer door is equal to or less than one-half of a distance between an abutting position of the inner door with the inner surface of the outer door and a lower end edge of the outer door.
According to the opening and closing mechanism of claim 1,
the invention described in claim 2 of the present invention 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: acceleration of gravity [ m/s2]
d 1: distance [ m ] between position of support shaft for supporting inner door and position to which pressing force is applied based on load of conveyed object
d 2: distance [ m ] between position of support shaft for supporting outer door and position for applying force from inner door
D1: distance [ m ] between position of support shaft for supporting inner door and position where inner door is in contact with inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f 1: pressing force based on load of conveyed object [ N ]
According to the opening and closing mechanism of claim 1,
the invention according to claim 3 of the present invention is characterized in that,
a gap of a desired size is formed between the peripheral edge of the opening portion and the peripheral edge of the outer door, and a seal or a gasket is attached to the gap.
According to the opening and closing mechanism of claim 3,
the invention according to claim 4 of the present invention is characterized in that,
the seal or the gasket is attached to the gap so as to be sandwiched between the inner peripheral surface of the opening and the outer peripheral surface of the outer door.
The opening/closing mechanism according to claim 3 or 4,
the invention according to claim 5 of the present invention is characterized in that,
the gasket is formed in a sheet shape.
The opening/closing mechanism according to claim 3 or 4,
the invention according to claim 6 of the present invention is characterized in that,
the seal member has a support portion for fixing the seal member between the opening portion and the outer door.
The opening/closing mechanism according to any one of claims 1 to 6,
the invention according to claim 7 of the present invention is characterized in that,
a support member that is provided so as to protrude from the upper end of the opening portion inward of the inner door and that abuts against the upper end of the inner door to support the inner door in an upright state,
the support member is configured such that the support member is,
the support member has a magnet that abuts against or separates from the inner door, and the magnet attracts the inner door by a magnetic force generated between the inner door and the magnet, thereby abutting against the inner door.
The opening/closing mechanism according to any one of claims 1 to 7,
the invention according to claim 8 of the present invention is characterized in that,
the opening portion is formed to occupy one fourth to one ninth of a lower end portion of the side face wall.
The opening/closing mechanism according to any one of claims 1 to 8,
the invention according to claim 9 of the present invention is characterized in that,
the opening is formed in the side wall on the rear end side.
The invention described in claim 10 of the present invention is a container, characterized in that,
the container has the 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 invention is provided in a container having a box-shaped top wall, side walls, and a bottom wall, for opening or closing an opening of at least 1 side wall formed in the container, the opening/closing mechanism including: an outer door that opens or closes an outer side of the opening portion; and an inner door provided with a predetermined distance from the outer door to the inside thereof so as to open or close the inside of the opening, wherein the outer door is configured such that an upper end edge thereof is supported rotatably in the vertical direction on 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 supported rotatably in the vertical direction on 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 inner door is rotated outward in a state where the outer door closes the opening, an upper end edge of the inner door abuts against an inner surface of the outer door, and the inner door is configured such that a distance between an abutting position of the inner door with the inner surface of the outer door and a center of a support shaft that supports the rotation of the outer door is equal to or less than one-half of a distance between an abutting position of the inner door with the inner surface of the outer door and a lower end edge of the outer door.
Therefore, according to this opening/closing mechanism, the pressing force based on the load of the conveyed object is more reliably transmitted to the lower end portion of the outer door as a force smaller than the force that is originally transmitted.
Therefore, since the outer door serving as the opening/closing door is easily locked in closing, 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 material to be conveyed is a powder or granule.
In the opening/closing mechanism, the outer door may be configured to satisfy the following formula (1).
According to such a configuration, the closing of the outer door can be simply and firmly locked without using a locking unit.
Further, the unlocking of the closing of the outer door and the opening of the opening can be performed only by lifting and tilting the container on the side 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), 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: acceleration of gravity [ m/s2]
d 1: distance [ m ] between position of support shaft for supporting inner door and position to which pressing force is applied based on load of conveyed object
d 2: distance [ m ] between position of support shaft for supporting outer door and position for applying force from inner door
D1: distance [ m ] between position of support shaft for supporting inner door and position where inner door is in contact with inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f 1: pressing force based on load of conveyed object [ N ]
In addition to or instead of the case where the outer door is configured to satisfy the above expression (1), the opening/closing mechanism may be configured to form a gap of a desired size between the peripheral edge of the opening and the outer door, and a seal, preferably a seal having a support portion for fixing the seal between the opening and the outer door, or a gasket, preferably a sheet-shaped gasket, may be attached to the gap.
In the case of such a configuration, the locking of the closing of the outer door can be easily and firmly performed without using the locking means, and the unlocking of the closing of the outer door and the opening of the opening can be performed only by performing the operation of lifting and tilting the side of the container facing 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).
In the opening/closing mechanism, the seal or the 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 a 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 and acts in a direction to close the outer door, it is possible to suppress the outer door from rotating in the opening direction, and it is possible to more reliably lock the outer door in the closed state without using a locking means.
In the opening/closing mechanism, a support member may be provided to protrude from an upper end of the opening portion inward of the inner door, the support member being in contact with an upper end portion of the inner door to support the inner door in an upright state, the support member being configured to be in contact with or separated from the inner door, the support member including a magnet, and the support member being in contact with the inner door by being attracted by a magnetic force generated between the inner door and the magnet.
According to this configuration, the inner door can be held in an upright state in a normal state, and the container is filled with the transported object, and the inner door can be tilted outward by the pressing force based on the load of the transported object.
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, in a range of one fourth to one ninth of the lower end portion of the side wall.
With this configuration, the object can be more easily conveyed.
The opening/closing mechanism may be provided in an opening formed in at least 1 side wall of a container having a box-shaped upper wall, side walls, 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 the rear end side of a container as the opening/closing mechanism of the present invention.
Fig. 2 is a 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, in which fig. 3 (a) shows a state where a container not filled with a transported object is left on a horizontal surface and an opening portion is closed by an inner door and an outer door, fig. 3 (B) shows a state where a transported object is filled in the container, whereby the inner door is rotated outward and brought into contact with the inner surface of the outer door closing the opening, and FIG. 3 (C) shows a state where the container is tilted right and left at an angle of 10 DEG by raising the front end side, FIG. 3D shows a state where the tip end side is further raised and inclined at an angle of 15 DEG to the left and right, FIG. 3E shows a state where the tip end side is further raised and inclined at an angle of 20 degrees, fig. 3 (F) shows a state in which the front end side is further raised and inclined to an angle of about 25 ° to 30 ° and the conveyed material is completely discharged.
Fig. 4 is a front view showing another example of the opening/closing mechanism of the present invention, which is provided in an opening portion formed in a side wall on the rear end side of the container.
Fig. 5 is an explanatory view schematically showing an example of a seal member inserted between the inner peripheral surface of the opening portion 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, in which fig. 6 (a) shows a state where a container not filled with a transported object is left on a horizontal surface and an opening portion is closed by an inner door and an outer door, fig. 6 (B) shows a state where the inner door is rotated outward and brought into contact with an inner surface of the outer door closing the opening portion by filling the transported object in the container, fig. 6 (C) shows a case where the container is in a state where a front end side thereof is raised and inclined at an angle of 10 °, fig. 6 (D) shows a case where the front end side is further raised and inclined at an angle of 20 °, fig. 6 (E) shows a case where the front end side is further raised and inclined at an angle of 30 °, fig. 6 (F) shows a case where the front end side is further raised and inclined at an angle of 33 °, fig. 6 (G) shows a state where the leading end side is further raised and tilted to an angle of about 35 ° and the transported object is completely discharged.
Description of the reference numerals
1. A container; 2. a container main body; 3. an upper wall; 4. a lateral wall on the left side; 5. a side wall on the right side; 6. a side wall on the rear end side; 6a, an opening; 6b, a holding member; 7. a bottom wall; 8. an opening and closing mechanism; 81. an outer door; 81a, hinge 1; 81b, the 1 st support shaft; 82. an inner door; 82a, a 2 nd support shaft; 82b, an abutting portion; 9. a locking unit; 9a, a locking rod; 9b, an operating handle; 10. a seal member; 10a, a closing part; 10b, a support portion; s, clearance; m, a magnet.
Detailed Description
An embodiment of the container of the present invention is specifically described below based on the appended drawings.
The present invention is not limited to the embodiments disclosed, and various modifications can be made without departing from the scope of the present invention.
Fig. 1 is a front view of the rear end side of a container 1 of the present invention.
The container body 2 constituting the container 1 is not particularly shown, and is formed in an elongated box shape by an upper wall 3, a pair of long- side walls 4 and 5, a pair of short-side walls (a front side wall (not shown) and a rear side wall 6), and a bottom wall 7, and is in accordance with ISO (international organization for standardization) and CSC (international treaty on container safety), which are standards for international maritime containers.
When the container 1 is mounted on a vehicle, the rear end side of the container body 2 is located on the rear side.
As shown in fig. 1 and 2, an opening 6a having a desired size (opening dimension) is provided in the 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 includes an outer door 81 and an inner door 82, the outer door 81 is configured to be rotated in the vertical direction toward the outside in order to open or close the outlet side (outside) of the opening 6a, and the inner door 82 is configured to be disposed at a predetermined interval inside the outer door 81 and to be rotated in the vertical 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 made of a metal material from the viewpoints of strength retention, quality, and the like in use, but an appropriate material can be selected as long as the effect of the present invention is not impaired.
The outer door 81 is formed of a plate-like body having a rectangular shape in front view as shown in fig. 1, and is configured such that, as shown in fig. 2, one end side (upper end edge in fig. 1 and 2) in the short side direction thereof is rotatably supported by the side wall 6 at or near the upper end of the outlet side of the opening 6a via a hinge (1 st hinge) 81a having an inverted letter L shape in side view, and the other end side (lower end side in fig. 1 and 2) is a free end portion.
Further, reference numeral 81b is a support shaft (1 st support shaft) as a rotation center of the hinge 81 a.
As shown in fig. 1, a lock unit 9 for locking the outer door 81 is provided in 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 knob 9b, the lock lever 9a is bar-shaped and extends between the side walls 4 and 5 in the vicinity of the outer door 81 to lock the closing of the outer door 81, and the operation knob 9b is attached to the lock lever 9a and is rotated by operating the lock lever 9 to lock and unlock the outer door 81.
The inner door 82 is disposed at a position inward of the outer door 81 with a predetermined distance, and is formed of a plate-like body having a rectangular shape in 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 (No. 2 hinge) (not shown) having a shape of japanese kana く in side view, and the other end side (upper end side in fig. 1 and 2) is a free end.
Therefore, the transported object filled in the container 1 abuts on the inner door 82, and presses the inner door 82 with the pressing force based on the load of the transported object, but does not abut on the outer door 81, and the outer door 81 is not pressed, so that even if the locking of the closing of the outer door 81 is forgotten, the transported object can be prevented or suppressed from leaking from the free end portion (the lower end side in fig. 1 and 2) of the outer door 81 with an extremely 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, and is not particularly limited, but the opening 6a is preferably formed so as to occupy about one quarter to one ninth of the lower end portion of the side wall forming the opening 6 a.
Therefore, the outer door 81 and the inner door 82 may be configured to have a size corresponding 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 occupy approximately 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 occupy approximately one seventh to one ninth of the outer lower end portion of the side wall 6, the inner door 82 is easily returned to the vertically erected state after the discharge of the conveyed material is completed.
In the present invention, as shown in fig. 2, the inner door 82 is configured such that when the inner door 82 is turned (tilted) outward in a state where the opening portion 6a is closed by the outer door 81, an upper end edge (abutting portion 82b) 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 the following positions are more preferably selected: the distance between the axis of the 1 st support shaft 81b and the abutment position is equal to or less than one-half of the distance between the lower end edge of the outer door 81 and the abutment position.
According to such a configuration, the pressing force based on the load of the conveyed object can be transmitted as a small force at the lower end portion (operating point) of the outer door 81, and therefore, the closing of the outer door can be easily locked.
Namely, assistance in 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 on the vicinity of the upper end of the inner surface of the outer door 81 when it is turned (tilted) outward by about 10 °.
The mechanism of locking or assisting locking by the opening and closing mechanism having such a structure will be described below.
In the inner door 82, the 2 nd support shaft 82a (specifically, the axial center thereof) that supports the inner door 82 functions as a fulcrum, a position to which a force generated by a load of a conveyed object is applied functions as a force point, and a position (contact portion 82b) that is in contact with the inner surface of the outer door 81 functions as a point of action.
In the present invention, since the fulcrum is located outside and closer to the force point and the action point, a small motion applied to the force point becomes a large motion at the action point.
Therefore, at the action point, the pressing force based on the load of the object to be conveyed applied to the force point is reduced by the principle of leverage, and is transmitted as a force smaller than the pressing force.
Specifically, if 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 applied to the force point by the load of the object is F1[ N ], and the force transmitted at the action point is F1[ N ], a relationship of D1 × F1 to D1 × F1(D1< D1) is established.
On the other hand, in the outer door 81, the 1 st support shaft 81b (specifically, the axial center thereof) disposed at or near the upper end of the opening portion 6a and supporting the outer door 81 functions as a fulcrum, a position where a force is applied from the inner door 82 (an abutting position of the inner surface of the outer door 81 with 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 invention, since the fulcrum is located outside and closer to the force point and the action point, a small motion applied to the force point becomes a large motion at the action point.
Therefore, at the point of action, the force transmitted from the inner door 82 applied to the point of force is reduced by the principle of leverage, and is transmitted as a force smaller than this force.
That is, the pressing force based on the load of the conveyed object is transmitted as a smaller force at the acting point 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 F2[ N ], and the force at the action point is F2[ N ], a relationship of D2 × F2 to D2 × F2(D2< D2) is established.
Here, since F2 is F1, (D2 × D1 × F1)/D1 is D2 × F2.
Therefore, in a state where the opening 6a is closed, the pressing force F1 based on the load of the transported object is reduced by the principle of leverage, and is transmitted outward at the lower end (operating point) of the outer door 81 by the force F2 of (D2 × D1)/(D1 × D2) of the pressing force F1.
Therefore, in the present invention, even when a less strong locking means is used for the outer door 81, the closing of the outer door 81 can be reliably locked.
As an embodiment of the inventionIn an embodiment, the mass of the outer door 81 is m [ kg [ ]]Setting the gravity acceleration to g [ m/s ]2]In this case, F2 is not more than mg, that is, the following formula (1) is satisfied.
According to such a configuration, the outer door 81 is not opened by the load of the conveyed object in a normal state (in a state where the container is in a standing state), and therefore, the container of the present invention does not require a locking unit for locking the closing of the outer door, or only a relatively simple locking unit may be attached to the outer door.
Therefore, the operator can unlock the closing of the outer door and open the opening only by lifting and tilting the side (the front end side in the present embodiment) opposite to the open/close door of the container without standing in front of the outer door (open/close 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: acceleration of gravity [ m/s2]
d 1: distance [ m ] between position of support shaft for supporting inner door and position to which pressing force is applied based on load of conveyed object
d 2: distance [ m ] between position of support shaft for supporting outer door and position for applying force from inner door
D1: distance [ m ] between position of support shaft for supporting inner door and position where inner door is in contact with inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f 1: pressing force based on load of conveyed object [ N ]
In fig. 2, a support member 6b is provided so as to protrude from an upper end of the opening portion 6a on the 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 and holds the inner door 82 in a state of standing (vertically in fig. 2) with respect to the bottom wall 7.
The support member 6b is configured to abut against 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 abutting against the inner door 82.
On the other hand, at least the 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 is input, the support member 6b can pull the inner door 82 and hold it in an upright state.
In addition, the contact surfaces of the inner door 82 and the magnet M are both configured as smooth surfaces in terms of rigidity or holding force.
The magnet may be selected from magnets having a property of attracting a magnetic substance by magnetization, and is not particularly limited.
As the magnet, for example, a neodymium magnet can be selected.
Further, the magnetic force of the magnet is preferably configured to attract the inner door by an attracting force, and the inner door is preferably configured to be separated by a pressing force based on a load of the object.
According to such a configuration, the inner door abuts against the support member in a standing state when the container is at rest and not filled with the transported object, and falls outward by a pressing force based on a load of the transported object when the container is filled with the transported object.
In addition, the magnet may be provided in an amount of 1 or more than one to the support member as long as the effect of the present invention is not impaired.
For example, as shown in fig. 3, the opening/closing mechanism 8 according to the above embodiment can discharge the object to be conveyed.
In fig. 3 a, in the container 1, the opening 6a formed in the side wall 6 (rear end side in this embodiment) of the container 1 is configured such that both the outlet side and the inlet side thereof occupy approximately one fourth to one fifth of the lower end portion of the side wall 6, and the opening 6a is closed at the outer side by the outer door 81 and at the inner side by the inner door 82.
As shown in fig. 3 (a), the container 1 is in a state of being left at a horizontal surface.
As shown in fig. 3 (a), in the opening 6a, at the upper end inside the inner door 82, a support member 6b is provided so as to protrude inward.
More specifically, in fig. 3 (a), the support member 6b is formed of a plate-like body and is provided to protrude downward.
The inner door 82 is restricted from rotating inward by the support member 6b, and is held in a state of standing vertically with respect to the bottom wall 7.
In fig. 3 (a), the support member 6b is configured to abut against the inner door 82 via the magnet M, that is, it has the magnet M on the side abutting against the inner door 82.
The magnet M attracts the inner door 82 by its magnetic force, but when the conveyed material is charged from a charge port (not shown) provided in the upper wall 3 and filled in the container 1 in a state where the outer door 81 is locked in the closed state, the inner door 82 is configured to be separated from the support member 6B by a pressing force based on the load of the conveyed material, as shown in fig. 3B.
In fig. 3 (B), the pressing force F2 based on the load of the transported object, which is applied from the inside toward the outside with respect to the lower end portion of the outer door 81, is set so that F2 ≦ mg is satisfied when the mass of the outer door 81 is m and the gravitational acceleration is g, and therefore, the outer door 81 is in a state in which its closing is locked in a state in which the container 1 is standing on a horizontal plane, and therefore, it is not opened by the load of the transported object.
Then, when the side of the container 1 opposite to the opening and closing door (the front end side in the present embodiment) 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 (the rear side in the present embodiment) by its own weight.
When the side of the container 1 opposite to the opening/closing door is further lifted from this state, the opening 6a is opened along with the rotation of the outer door 81, and when the opening 6a is completely opened, all the objects to be conveyed are discharged ((D) of fig. 3 → (F) of fig. 3).
As another embodiment of the present invention, as shown in fig. 4 and 5, in addition to or instead of the case where the outer door 81 is configured to satisfy the above expression (1), a gap S having 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 a 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 expression (1) can be obtained.
As is apparent from fig. 4 and 5, the outer door 81 is configured to have a small size relative to the size of the opening 6a, and one end side in the short side direction (the upper end edge in fig. 4 and 5) is rotatably supported by the side wall 6 above the outlet side of the opening 6a via a hinge 81a having an inverted letter L shape in side view.
Therefore, a gap S having 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 a gasket can be inserted into the gap S.
The seal and the gasket are attached inside 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 therefore, in the gap S, the seal and the gasket are compressed between the inner peripheral surface of the opening portion 6a and the outer peripheral surface of the outer door 81, and are biased toward the inner peripheral surface side of the opening portion 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.
Therefore, the reaction force acts as a load and suppresses the outer door 81 from rotating in the opening direction, and therefore, the closing of the outer door 81 can be locked more reliably without using a locking means.
The rotation of the outer door 81 in the opening direction may be performed by only raising and tilting the side of the container 1 facing the opening/closing door (the front end side in the case where an 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 outer side 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 formed 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 inside 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 the gasket, one or more can be installed in all or part of the gap.
In fig. 4 and 5, the seal 10 is attached to the entire outer periphery of the outer door 81.
For example, as shown in fig. 6, the opening/closing mechanism 8 according to the above embodiment can discharge the object to be conveyed.
In fig. 6a, in the container 1, the opening 6a formed in the side wall 6 (rear end side in this embodiment) of the container 1 is configured such that both the outlet side and the inlet side thereof occupy approximately one fourth to one fifth of the lower end portion of the side wall 6, and the opening 6a is closed at the outer side by the outer door 81 and at the inner side by the inner door 82.
The container 1 is in a state of being left at a horizontal surface as shown in fig. 6 (a).
In fig. 6 (B), a gap S of a desired size is formed between the inner peripheral surface of the opening portion 6a and the outer peripheral surface of the outer door 81, and the seal 10 is inserted into the entire gap S, that is, along the outer periphery of the outer door 81.
As shown in fig. 6 (a), at the upper end of the opening 6a on the inner side of the inner door 82, a support member 6b is provided so as to protrude inward.
More specifically, in fig. 6 (a), the support member 6b is formed of a plate-like body and is provided to protrude downward.
The inner door 82 is restricted from rotating inward by the support member 6b, and is held in a state of standing vertically with respect to the bottom wall 7.
In fig. 6B, a material to be conveyed is charged into the container 1 from a charging port (not shown) provided in the upper wall 3 of the container 1 and is filled.
When the container 1 is filled with the transported object, the inner door 82 is separated from the support member 6B by the pressing force based on the load of the transported object, as shown in fig. 6 (B).
After the object is filled, the locking unit 9 is released as shown in fig. 6 (B).
Since the seal 10 generates a biasing force by being compressed between the inner peripheral surface of the opening portion 6a and the outer peripheral surface of the outer door 81, and generates a reaction force (resistance) based on the biasing force, the outer door 81 is in a state where the reaction force is larger than a pressing force (fig. 6 (C) → fig. 6 (D)) based on a load of the conveyed object applied to the outer door 81 via the inner door 82, and a state where the reaction force is the same as the pressing force (fig. 6 (E)), and therefore, the outer door 81 is not opened by the load of the conveyed object.
Then, when the side of the container 1 opposite to the opening and closing door (the front end side in this embodiment) is lifted and the inclination angle of the container 1 reaches a predetermined angle (about 33 ° in (F) of fig. 6), as shown in (F) of fig. 6, the outer door 81 is rotated outward (the rear side in this embodiment) by the pressing and self-weight based on the load of the conveyed object.
When the side of the container 1 opposite to the opening/closing door is further lifted from this state, the opening 6a is opened in conjunction with the rotation of the outer door 81, and when the opening 6a is completely opened, all the objects to be conveyed are discharged ((G) of fig. 6).
In the present embodiment, the opening/closing mechanism 8 is provided in the opening portion 6a formed in the side wall 6 on the rear end side, but the opening portion is not limited to the side wall on the rear end side, and 1 or more opening/closing mechanisms may be provided in each of the opening portions, formed in at least 1 of the side walls constituting the container main body.
The container of the present invention can be used for transporting powder or granular material such as wood particles, but can be used for transporting general cargo.
Industrial applicability
The opening/closing mechanism of the present invention has a mechanism capable of easily locking or assisting locking of closing of an opening/closing door provided on the rear end side of the container, can easily and safely discharge objects to be transported, particularly powder and granular material, loaded and stored in the container, and can be applied to all containers.

Claims (10)

1. An opening/closing mechanism for a container, which is provided in an opening portion formed in a container having a box-shaped upper wall, side walls, and a bottom wall, for opening or closing the opening portion of at least 1 of the side walls,
the opening and closing mechanism is characterized in that,
the opening and closing mechanism includes: an outer door that opens or closes an outer side of the opening portion; and an inner door provided with a predetermined distance from the outer door to the inner side so as to open or close the inner side of the opening,
the outer door is configured such that an upper end edge thereof is supported by a side wall at or near an upper end of the opening portion so as to be rotatable in a vertical direction, and a lower end side thereof is a free end portion,
the inner door is configured such that a lower end edge thereof is supported by the bottom wall so as to be rotatable in the vertical 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 where the outer door closes the opening, an upper end edge of the inner door abuts against an inner surface of the outer door, and the inner door is configured such that a distance between an abutting position of the inner door with the inner surface of the outer door and a center of a support shaft that supports the rotation of the outer door is equal to or less than one-half of a distance between an abutting position of the inner door with the inner surface of the outer door and a lower end edge of the outer door.
2. The opening-closing mechanism according to claim 1,
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: acceleration of gravity [ m/s2]
d 1: distance [ m ] between position of support shaft for supporting inner door and position to which pressing force is applied based on load of conveyed object
d 2: distance [ m ] between position of support shaft for supporting outer door and position for applying force from inner door
D1: distance [ m ] between position of support shaft for supporting inner door and position where inner door is in contact with inner surface of outer door
D2: distance [ m ] between position of support shaft for supporting outer door and lower end of outer door
f 1: the pressing force [ N ] is based on the load of the transported object.
3. The opening-closing mechanism according to claim 1,
a gap of a desired size is formed between the peripheral edge of the opening portion and the peripheral edge of the outer door, and a seal or a gasket is attached to the gap.
4. The opening-closing mechanism according to claim 3,
the seal or the gasket is attached to the gap so as to be sandwiched between the inner peripheral surface of the opening and the outer peripheral surface of the outer door.
5. The opening-closing mechanism according to claim 3 or 4,
the gasket is formed in a sheet shape.
6. The opening-closing mechanism according to claim 3 or 4,
the seal member has a support portion for fixing the seal member between the opening portion and the outer door.
7. The opening/closing mechanism according to any one of claims 1 to 6,
a support member that is provided so as to protrude from the upper end of the opening portion inward of the inner door and that abuts against the upper end of the inner door to support the inner door in an upright state,
the support member is configured such that the support member is,
the support member has a magnet that abuts against or separates from the inner door, and the magnet attracts the inner door by a magnetic force generated between the inner door and the magnet, thereby abutting against the inner door.
8. The opening/closing mechanism according to any one of claims 1 to 7,
the opening portion is formed to occupy one fourth to one ninth of a lower end portion of the side face wall.
9. The opening/closing mechanism according to any one of claims 1 to 8,
the opening is formed in the side wall on the rear end side.
10. A container, which is characterized in that,
the container has the opening/closing mechanism according to any one of claims 1 to 9.
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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JP2020-086665 2020-05-18
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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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
KR100794488B1 (en) 2007-10-09 2008-01-16 대한통운 주식회사 Container having an unloading appratus
KR100824982B1 (en) 2007-11-14 2008-04-28 한빛테크원 (주) A armroll container
JP6786677B1 (en) 2019-07-26 2020-11-18 合同会社箱一 container

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0560243A (en) * 1991-08-29 1993-03-09 Hoshizaki Electric Co Ltd Door for pressure reducing container
US20040222220A1 (en) * 2003-03-12 2004-11-11 Dewinter Uwe 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
CN107878947A (en) * 2016-09-30 2018-04-06 南通中集特种运输设备制造有限公司 Locking device, door structure of container 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

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