阅读说明：本技术 集装箱 (Container, especially container for transporting goods ) 是由 增永路人 金石润 具孟书 于 2020-01-14 设计创作，主要内容包括：本发明提供能容易且安全地将所装载和储存的被输送物、尤其是粉粒体排出的集装箱。本发明的集装箱(1)具有以能够转动的方式与后端侧相连结并向上下方向进行开闭的开闭门(2b),其具有对所述开闭门(2b)的关闭进行锁定的锁定单元(4),所述锁定单元(4)包括卡合体(4a)和以能够转动的方式轴支承于该卡合体(4a)的一端的摆锤构件(41a),所述卡合体(4a)构成为,一侧的端部以能够转动的方式轴支承于构成所述集装箱(1)的底面壁(3)的短边侧的后端侧,另一侧的自由端部具有以与形成于所述开闭门(2b)的预定的位置的卡合构件(2d)卡合的方式向前方突出形成的卡合部(4b),所述摆锤构件(41a)设于该卡合体(4a)的另一侧的自由端部。(The invention provides a container which can easily and safely discharge the loaded and stored transported objects, especially powder and granular material. The container (1) of the invention is provided with an opening and closing door (2b) which is connected with the rear end side in a rotatable way and is opened and closed in the vertical direction, which has a locking unit (4) for locking the closing of the opening/closing door (2b), the lock unit (4) includes an engaging body (4a) and a pendulum member (41a) pivotally supported at one end of the engaging body (4a) so as to be rotatable, the engaging body (4a) is configured in such a manner that one end part is rotatably and axially supported at the rear end side of the short side of the bottom wall (3) of the container (1), the other free end part is provided with an engaging part (4b) which is formed in a protruding manner in the front direction in a manner of engaging with an engaging member (2d) formed at a predetermined position of the opening and closing door (2b), the pendulum member (41a) is provided at the other free end of the engaging body (4 a).)

1. A container having an opening/closing door rotatably connected to a rear end side and opened and closed in the vertical direction,

the container is characterized in that it is provided with a container,

which has a locking unit for locking the closing of the opening and closing door,

the lock unit includes an engaging body and a pendulum member pivotally supported at one end of the engaging body in a rotatable manner,

the engagement body is configured such that one end portion of the engagement body is pivotally supported on a rear end side of a short side constituting a bottom wall of the container so as to be rotatable, the other free end portion of the engagement body has an engagement portion formed to protrude forward so as to engage with an engagement member formed at a predetermined position of the opening/closing door, and the pendulum member is provided at the other free end portion of the engagement body.

2. The container of claim 1,

the weight of the pendulum member is set so that the pendulum member swings when the container is tilted by a predetermined angle, and the engagement body is rotated rearward by a centrifugal force generated by the swing, whereby the lock is released.

3. A container according to claim 1 or 2,

the locking unit includes:

a pair of plate-like bodies separated in parallel and opposed to each other and having a substantially japanese kana コ -like or inverted L-like shape in side view; a cylindrical body connected to one end edge of the pair of plate-like bodies in the longitudinal direction and communicating with a through hole formed in the pair of plate-like bodies through which the support shaft passes; and a support shaft that is pivotally supported by a through hole formed in the other end edge of the pair of plate-like bodies in the longitudinal direction, and is formed integrally with the pendulum member.

4. A container according to any one of claims 1 to 3,

the container further comprises an opening and closing unit for opening and closing the opening and closing door below the rear end side of the short side of the bottom wall,

the opening/closing unit includes a rod body having a required length and arranged to be movable in the longitudinal direction of the container in the front-rear direction, and an opening/closing member pivotally supported at a distal end portion of the rod body,

the rod main body is connected at a base end portion thereof with a power member capable of moving the rod main body in the front-rear direction,

the opening/closing member is configured such that a wedge-shaped guide having a tip end portion engaged with an engagement member disposed on the opening/closing door and a thickness thereof becoming thinner as the thickness thereof increases is provided on an upper surface of a base end portion,

when the lever main body moves rearward, the distal end portion of the opening/closing member is separated from an engagement member disposed on the opening/closing door.

5. The container of claim 4,

the power member includes a piston rod connected to a base end portion of the rod main body, a cylinder, a piston head fixed to the piston rod and movable in the cylinder in a longitudinal direction, and a compression spring loaded in one cylinder chamber partitioned by the piston head in the cylinder.

Technical Field

The present invention relates to a container.

And more particularly, to a container capable of easily and safely discharging a loaded and stored object to be conveyed, particularly, powder or granular material.

Background

Conventionally, as a method for conveying a powder or granule such as a wooden pellet, there is a method for conveying the powder or granule by a bulk container (bulk container) using a box-shaped container.

Such bulk containers are transported, for example, by installing an inner bag in a box container mounted on a vehicle, filling the inner bag with a powder or granular material, transporting the powder or granular material, mounting the box container on a loading platform having a tilting device at a destination, tilting the box container, and discharging the powder or granular material from a powder or granular material discharge port provided at a position that becomes a lower end of the inner bag when 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 floor surface opening and closing door side 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.

Disclosure of Invention

The problem to be solved by the inventionQuestion (I)

A box container for transporting powder such as a conventional bulk container is manually opened and closed by a rear opening/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 the opening and closing door by unwinding and winding a rope by a winch provided above the opening and closing door.

Therefore, when the opening/closing door is opened/closed, the winch needs to be operated, and therefore, the opening/closing door may not be smoothly and easily opened/closed.

In view of the above-described situation, the present invention is intended to provide a container that can easily and safely discharge a loaded and stored object to be conveyed, particularly, powder or granular material.

Means for solving the problems

The invention described in claim 1 of the present invention is a container having an opening/closing door which is connected to a rear end side so as to be rotatable and which opens and closes in an up-down direction,

the container is characterized in that it is provided with a container,

which has a locking unit for locking the closing of the opening and closing door,

the lock unit includes an engaging body and a pendulum member pivotally supported at one end of the engaging body in a rotatable manner,

the engagement body is configured such that one end portion of the engagement body is pivotally supported on a rear end side of a short side constituting a bottom wall of the container so as to be rotatable, the other free end portion of the engagement body has an engagement portion formed to protrude forward so as to engage with an engagement member formed at a predetermined position of the opening/closing door, and the pendulum member is provided at the other free end portion of the engagement body.

According to the container set forth in claim 1,

the invention described in claim 2 of the present invention is characterized in that,

the weight member swings when the container is tilted by a predetermined angle, and the engagement body is rotated rearward by a centrifugal force generated by the swing, so that the lock is released.

According to the container described in claim 1 or 2,

the invention according to claim 3 of the present invention is characterized in that,

the locking unit includes: a pair of plate-like bodies separated in parallel and opposed to each other and having a substantially japanese kana コ -like or inverted L-like shape in side view; a cylindrical body connected to one end edge of the pair of plate-like bodies in the longitudinal direction and communicating with a through hole formed in the pair of plate-like bodies through which the support shaft passes; and a support shaft that is pivotally supported by a through hole formed in the other end edge of the pair of plate-like bodies in the longitudinal direction, and is formed integrally with the pendulum member.

The container according to any one of claims 1 to 3,

the invention according to claim 4 of the present invention is characterized in that,

the container further comprises an opening/closing unit for opening/closing the opening/closing door below the rear end side of the short side of the bottom wall,

the opening/closing unit includes a rod body having a required length and arranged to be movable in the longitudinal direction of the container in the front-rear direction, and an opening/closing member pivotally supported at a distal end portion of the rod body,

the rod main body is connected at a base end portion thereof with a power member capable of moving the rod main body in the front-rear direction,

the opening/closing member is configured such that a wedge-shaped guide having a tip end portion engaged with an engagement member disposed on the opening/closing door and a thickness thereof becoming thinner as the thickness thereof increases is provided on an upper surface of a base end portion,

when the lever main body moves rearward, the distal end portion of the opening/closing member is separated from an engagement member disposed on the opening/closing door.

According to the container as set forth in claim 4,

the invention according to claim 5 of the present invention is characterized in that,

the power member includes a piston rod connected to a base end portion of the rod main body, a cylinder, a piston head fixed to the piston rod and movable in the cylinder in a longitudinal direction, and a compression spring loaded in one cylinder chamber partitioned by the piston head in the cylinder.

ADVANTAGEOUS EFFECTS OF INVENTION

The container of the present invention includes an opening/closing door rotatably connected to a rear end side and opened/closed in a vertical direction, and a lock unit for locking closing of the opening/closing door, wherein the lock unit includes an engaging body and a pendulum member rotatably pivotally supported at one end of the engaging body, the engaging body is configured such that one end of the engaging body is pivotally supported at the rear end side of a short side constituting a bottom wall of the container so as to be rotatable, the other free end of the engaging body has an engaging portion formed to protrude forward so as to engage with an engaging member formed at a predetermined position of the opening/closing door, and the pendulum member is provided at the other free end of the engaging body.

Therefore, according to this container, when the container is tilted at a predetermined angle by raising the front end side thereof, the pendulum member swings, and the engagement body swings rearward by the centrifugal force generated at that time, so that the state of engagement between the engagement body and the engagement member formed on the opening/closing door 2b is released, and as a result, the locking of the opening/closing door is released.

Therefore, the container can easily and safely discharge the conveyed object after conveyance.

In the container, the locking unit may include: a pair of plate-like bodies separated in parallel and opposed to each other and having a substantially japanese kana コ -like or inverted L-like shape in side view; a cylindrical body connected to one end edge of the pair of plate-like bodies in the longitudinal direction and communicating with a through hole formed in the pair of plate-like bodies through which the support shaft passes; and a support shaft that is pivotally supported by a through hole formed at the other end edge in the longitudinal direction of the pair of plate-like bodies, and is formed integrally with the pendulum member.

With this configuration, the pendulum member can be swung more reliably.

The container may further include an opening/closing unit for opening/closing the opening/closing door.

The opening and closing unit includes a lever body having a required length and arranged to be movable in a front-rear direction along a longitudinal direction of the container, and an opening and closing member pivotally supported at a distal end portion of the lever body, the lever body being connected at a proximal end portion thereof to a power member capable of moving the lever body in the front-rear direction, the opening and closing member being configured such that a wedge-shaped guide having a distal end portion engaged with an engaging member provided in the opening and closing door and a thickness-reduced inclined surface is provided on an upper surface of the proximal end portion so that the distal end portion of the opening and closing member is separated from the engaging member provided in the opening and closing door by the rearward movement of the lever body.

Therefore, according to this configuration, the opening and closing of the opening and closing door can be automatically performed only by raising the front end side of the container and tilting the container to a predetermined angle, and therefore, the opening and closing of the opening and closing door can be safely and easily performed.

In the container, the power member may include a piston rod connected to a base end portion of the rod main body, a cylinder, a piston head fixed to the piston rod and movable in the cylinder in a longitudinal direction, and a compression spring loaded in one cylinder chamber partitioned by the piston head in the cylinder.

According to such a configuration, the opening/closing door can be safely and automatically opened/closed by the weight of the conveyed object and the biasing force of the compression spring.

Drawings

Fig. 1 is a front view showing an example of a rear end side of a container according to the present invention.

Fig. 2 is an explanatory view showing a locking unit provided at the rear end side of the container shown in fig. 1, fig. 2 (a) is an enlarged view of a region a of fig. 1, and fig. 2 (B) is a cross-sectional view of C-C' of fig. 2 (a).

Fig. 3 is an explanatory view showing a locking mechanism of the locking unit shown in fig. 2, in which fig. 3 (a) shows a case where the container is in a state of being left standing, fig. 3 (B) shows a case where the container is in a state of being lifted and tilted at an angle of 5 °, fig. 3 (C) shows a case where the container is in a state of being further lifted and tilted at an angle of 7 °, and fig. 3 (D) shows a case where the container is in a state of being further lifted and tilted at an angle of 10 °.

Fig. 4 is an explanatory view showing an opening and closing unit provided at the rear end side of the container shown in fig. 1, fig. 4 (a) is an enlarged view of a region B of fig. 1, and fig. 4 (B) is a cross-sectional view of D-D' of fig. 4 (a).

Fig. 5 is an explanatory view showing an opening and closing mechanism of the opening and closing unit shown in fig. 4, in which fig. 5 (a) shows a case where the container is in a state of being left standing, fig. 5 (B) shows a case where the container is in a state of being lifted up and inclined at an angle of 5 °, and fig. 5 (C) shows a case where the container is in a state of being further lifted up and inclined at an angle of 15 °.

Fig. 6 is an explanatory view showing an example of a method of discharging an object to be conveyed in a container according to the present invention, fig. 6 (a) shows a state where the container is left standing, fig. 6 (B) shows a state where the container is tilted at an angle of 10 ° by raising the front end side of the container, fig. 6 (C) shows a state where the container is tilted at an angle of 15 ° by raising the front end side further, and fig. 6 (D) shows a state where the container is tilted at an angle of 35 ° by raising the front end side further.

Description of the reference numerals

1. A container; 1a, a container body; 2. a side wall on the rear end side; 2a, upper part (side wall); 2b, lower part (opening and closing door); 2c, a hinge; 2d, an engaging member; 3. a bottom wall; 3a, a space portion; 3b, a bearing; 3c, a pin member; 4. a locking unit; 4a, a snap body; 4b, a clamping part; 4c, a fulcrum; 41a, a pendulum member; 41b, a fulcrum; 42. a pillar; 5. an opening/closing unit; 5a, a lever body; 5b, an opening and closing member; 5c, a guide member; 5d, a support shaft; 5e, a stopper member; 51. a power member (spring cylinder); 51a, a cylinder body; 51b, a piston rod; 51c, a piston head; 51d, a compression spring; 6. a locking member; 6a, a locking part; 7. a stop member.

Detailed Description

An example of the implementation of the container of the present invention will be specifically described below based on the attached 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 1a constituting the container 1 is configured as a box shape having an elongated shape formed by an upper wall, a pair of side walls on the long side, a pair of side walls on the end side, and a bottom wall, and is configured to conform to ISO (international organization for standardization) and CSC (international treaty on container security), which are standards for international offshore containers, not particularly shown.

When the container 1 is mounted on a vehicle, the side wall on the rear end side is located on the rear side.

As shown in fig. 1, the rear-end side wall 2 is divided into an upper portion 2a and a lower portion 2b, and is connected by a hinge 2c, and the lower portion 2b constitutes an opening/closing door that can be folded back to the outside (rear) by the hinge 2 c.

Further, in fig. 1, the upper and lower lengths of the upper part 2a and the lower part 2b are set approximately in a ratio of 1 to 1.

As shown in fig. 1, a lock unit 4 is disposed at a rear end portion in the longitudinal direction of the bottom wall 3, and the lock unit 4 locks the opening/closing door 2b to prevent the opening/closing door 2b from being opened accidentally.

As shown in fig. 2, the lock unit 4 includes an engaging body 4a and a pendulum member 41a, and the pendulum member 41a is pivotally supported on an upper portion of the engaging body 4a so as to be rotatable.

Further, in fig. 2, reference numeral 7 is a stopper for preventing the bob member 41a from being accidentally swung during conveyance, whereby the opening and closing door 2b can be prevented from being accidentally opened during conveyance.

As shown in fig. 2, the engaging body 4a is pivotally supported at one end (lower end in fig. 2) thereof to the rear end side of the short side of the bottom wall 3 via a support shaft 4 c.

As shown in fig. 2, an engagement portion 4b is provided at the other free end portion (upper end portion in fig. 2), and a pendulum member 41a is rotatably and pivotally supported at the other free end portion, and the engagement portion 4b is formed to protrude inward (forward side) so as to engage with an engagement member 2d protruding at a predetermined position of the opening/closing door 2 b.

The pendulum member 41a has a required weight, and as shown in fig. 2, the lower end thereof is pivotally supported on the free end of the engaging body 4a so as to be rotatable.

According to such a configuration, when the container 1 is tilted at a predetermined angle by raising the front end side thereof, the pendulum member 41a swings outward (rearward) about the support shaft 41 b.

At this time, a centrifugal force is generated by the swinging of the pendulum member 41 a.

Therefore, the engaging body 4a swings outward (rearward) about the support shaft 4c by the centrifugal force, and the engaging state between the engaging body 4a and the engaging member 2d formed in the opening/closing door 2b is released, and as a result, the locking of the opening/closing door 2b is released.

The weight member 41a may be set so that the engaging body 4a swings rearward about the support shaft 4c by a centrifugal force generated by the swing of the weight member 41a, although the weight of the weight member 41a may be set according to the state (method, strength, etc.) of engagement between the engaging body 4a and the engaging member 2d, the ease with which the weight member 41a swings, and the like.

For example, the pendulum member 41a is set to have a substantially predetermined mass (for example, a mass equal to or larger than 2/5 of the mass of the engaging body 4a) with respect to the mass of the engaging body 4a itself, so that the engagement between the engaging body 4a and the engaging member 2d can be released by the centrifugal force generated by the swinging of the pendulum member 41 a.

In this embodiment, the mass of the engaging body 4a is set to 1.73kg, and therefore, the mass of the pendulum member 41a is set to 738 g.

In the locking unit 4 having such a configuration, in a state where the container 1 is still (not tilted), as shown in fig. 3a, the engaging portion 4b of the engaging body 4a pivotally supported on the rear end side on the short side of the bottom wall 3 is engaged with the engaging member 2d provided in the opening/closing door 2b, and the opening/closing door 2b closing the opening portion on the rear end side of the container main body 1a is locked.

When the front end side of the container 1 is raised from this state as shown in fig. 3 (B), the container 1 is inclined at a predetermined angle, and at this time, as shown in fig. 3 (C), the pendulum member 41a pivotally supported at the free end portion of the engaging body 4a swings rearward about the support shaft 41B.

Therefore, as shown in fig. 3 (D), the engaging body 4a is rotated rearward about the support shaft 4c by the centrifugal force generated by the swinging of the pendulum member 41 a.

When the engaging body 4a is rotated rearward, the engagement between the engaging portion 4b of the engaging body 4a and the engaging member 2d is released.

Thus, the locking of the opening/closing door 2b is also released.

Further, the lock unit 4 is not particularly limited in specific configuration as long as one end of the engaging body 4a is rotatably supported at the rear end portion in the longitudinal direction of the bottom wall 3, the other end of the engaging body 4a is engaged with an engaging member 2d formed at the opening/closing door 2b, and the engaging body 4a is rotatable rearward by a centrifugal force generated by the swinging of the pendulum member 41a by having the pendulum member 41a which is rotatably supported in the front-rear direction.

In the present embodiment, as shown in fig. 2, the locking unit 4 includes: a pair of plate-like bodies separated in parallel and opposed to each other and having a substantially japanese kana コ shape in side view; a cylindrical body connected to one end edge in the longitudinal direction of the pair of plate-like bodies so as to communicate with the through hole of the support shaft 4 c; and a support shaft 41b that is pivotally supported by a through hole formed at the other end edge and is formed integrally with the pendulum member 41 a.

The lock unit 4 is configured such that one end thereof is pivotally supported by bearings 3b and 3b formed on the rear end side of the short side of the bottom wall 3 via a support shaft 4c, and the lower surface of the support shaft 41b pivotally supported on the other end is configured as an engaging portion which is engaged with an engaging member 2d, and the engaging member 2d is configured by a rod-shaped body having a required length and formed to protrude from the opening/closing door 2 b.

In fig. 2, a support column 42 formed to protrude upward is provided on the front side of the upper end portion (free end portion) of the engaging body 4 a.

The stay 42 is used to support the pendulum member 41a in a rest state (non-tilted state) of the container 1.

As shown in fig. 1, a space portion 3a having a necessary size and opening to the rear end side is formed on the rear end side of the short side of the bottom wall 3 below the locking capsule 6, and an opening and closing means 5 for opening and closing the opening and closing door 2b is disposed in the space portion 3 a.

In the present embodiment, the space portion 3a is formed in the center of the short side.

The opening/closing unit 5 includes a lever main body 5a having a desired length and arranged to be movable in the front-rear direction along the longitudinal direction of the container main body 1a, and an opening/closing member 5b pivotally supported at the distal end of the lever main body 5 a.

The base end of the rod main body 5a is connected to a power member that can move the rod main body 5a in the front-rear direction.

The power member may be any power member as long as the lever main body 5a is movable in the front-rear direction along the longitudinal direction of the container main body 1a, and a specific mechanism may be selected without particular limitation.

In the present embodiment, as the power member, a spring cylinder 51 shown in fig. 4 is used.

As shown in fig. 4 (B), in the spring cylinder 51, a piston head 51c is fixed to a base end portion of a piston rod 51B connected to a base end portion of the rod main body 5a, a compression spring 51d is loaded in one cylinder chamber partitioned by the piston head 51c in the cylinder 51a, and the spring cylinder 51 is held in parallel with the longitudinal direction of the container main body 1 a.

With this configuration, the opening/closing door 2b can be automatically opened/closed without using a motor such as a motor.

In fig. 4 (B), the compression spring 51d in the attached state is compressed by the piston head 51c, and exerts a force in a direction of pulling the piston rod 51B back into the cylinder 51 a.

Therefore, since the locking member 6 disposed in the opening/closing door 2b is engaged with the opening/closing member 5b and the opening/closing member 5b is connected to the piston rod 51b via the rod main body 5a as described later, the opening/closing door 2b is not opened unintentionally by the biasing force of the spring cylinder 51.

On the other hand, when the container 1 is tilted at a predetermined angle by raising the front end side thereof, the piston rod 51b is pulled out from the cylinder 51a by the weight of the conveyed object.

The opening/closing member 5b pivotally supported at the distal end of the lever main body 5a via the support shaft 5d is formed of a rod-shaped body having a desired length.

A bolt-shaped stopper member 5e having a head is attached to a distal end portion of the opening/closing member 5b to lock the locking member 6.

A locking member 6 formed of a band-shaped plate material as a whole is disposed at a position corresponding to the opening/closing unit 5 at the lower end portion of the opening/closing door 2 b.

The locking member 6 has a locking portion 6a formed by cutting a predetermined length upward at its lower edge, and the locking portion 6a is engaged with the opening/closing member 5a as shown in fig. 4 (a) and 4 (B).

Therefore, the opening/closing member 5b is configured such that the distal end portion thereof is separated from the locking member 6 disposed in the opening/closing door 2b by the rearward movement of the lever main body 5a, and is returned to the original position again by the forward movement of the lever main body 5 a.

That is, the opening/closing member 5B is always biased forward (leftward in fig. 4B) by the biasing force of the spring cylinder 51 connected to the opening/closing member 5B via the lever main body 5 a.

Therefore, similarly to the lever main body 5a, when the opening portion on the rear end side of the container main body 1a is closed by the opening/closing door 2b, the opening/closing door is held in a state of being substantially parallel to the longitudinal direction of the container main body 1 a.

At the same time, a wedge-shaped guide 5c having an inclined surface formed so as to become thinner toward the rear (the right side in fig. 4B) is integrally fixed to the upper surface of the base end portion of the opening/closing member 5B, and a pin member 3c always in contact with the inclined surface of the guide 5c is fixed to the upper surface in the space portion 3 a.

Therefore, when the piston rod 51B is pulled out to the rear side against the biasing force of the compression spring 51d and the lever main body 5a moves to the rear side, the inclined surface of the guide 5c of the opening/closing member 5B is formed to be thinner from the front to the rear, and therefore, the opening/closing member 5B is inclined downward with the support shaft 5d as the center, that is, inclined in a direction away from the locking member 6 disposed on the opening/closing door 2B, as shown in fig. 4 (B).

In the opening/closing unit 5 having such a configuration, as shown in fig. 5a, in a state where the container 1 is still (not tilted), the opening/closing member 5b of the opening/closing unit 5 disposed on the rear end side of the container body 1a (specifically, on the short side of the bottom wall 3 thereof) is engaged with the locking member 6 provided in the opening/closing door 2b, and the opening on the rear end side of the container body 1a is closed by the opening/closing door 2 b.

At this time, the rod main body 5a is biased toward the front end side by the biasing force of the spring cylinder 51.

As shown in fig. 5 (B), when the front end side of the container 1 is raised from this state, the piston rod 51B of the spring cylinder 51 is gradually pulled out toward the rear side against the biasing force of the compression spring 51d by the weight of the conveyed object.

Therefore, the rod main body 5a connected to the piston rod 51B moves rearward, and as shown in fig. 5 (B), the guide 5c fixed to the base end portion of the opening/closing member 5B moves downward along the pin member 3 c.

At the same time, the opening/closing member 5b pivotally supported at the distal end portion of the lever main body 5a is pushed downward, and is separated from the engaging member 6 of the opening/closing door 2b against the urging force of the spring cylinder 51, and the engagement between the opening/closing member 5b and the engaging member 6 is released.

Thus, the opening and closing door 2B is opened ((B) of fig. 5 → (C) of fig. 5).

On the other hand, in the container 1 in the inclined state, when the front end side thereof is gradually lowered, the piston rod 51b is pulled back forward by the urging force of the compression spring 51d, and therefore the rod main body 5a connected to the piston rod 51b moves forward, and the opening/closing member 5b pivotally supported at the distal end portion of the rod main body 5a is pulled back upward.

The opening/closing member 5b moves upward, and at the same time, the opening/closing door 2b is pulled toward the container body 1a, and the opening/closing member 5b engages with the locking portion 6a of the locking member 6 provided in the opening/closing door 2 b.

Therefore, the opening portion on the rear end side of the container main body 1a is closed by the opening/closing door 2 b.

With the opening/closing device having such a structure, the opening/closing of the opening portion on the rear end side of the container body 1a by the opening/closing door 2b can be safely and automatically performed.

In the present invention, the locking unit and the opening and closing unit may be provided in one or more than one with respect to the opening and closing door, respectively.

In fig. 1, the container 1 is configured such that one opening/closing unit 5 is provided at the center of the rear end side on the short side of the bottom wall 3, and one locking unit 4 is provided in the vicinity of the opening/closing unit 5.

With this configuration, when the container 1 is tilted by gradually raising the front end side using the lifting means or the like, the locking of the opening/closing door 2b by the locking means 4 is first released at a predetermined angle, and then the container 1 is further tilted, and at this time, the opening/closing door 2b is automatically opened at a predetermined angle by the opening/closing means 5.

With the container 1 having such a structure, the discharge operation of the objects to be conveyed can be performed as follows.

A lifting unit (not shown) capable of lifting and lowering the front end side thereof is attached to a predetermined position of the container 1 (fig. 6 a).

When the front end side of the container 1 is gradually raised to reach a predetermined angle, the pendulum member 41a of the lock unit 4 swings rearward ((a) of fig. 6 → (B) of fig. 6).

When the pendulum member 41a swings rearward, the engaging body 4a provided with the pendulum member 41a also rotates rearward as shown in fig. 6 (B) due to the centrifugal force generated by the swing, and therefore, the engagement with the engaging member 2d is released, and the lock of the opening/closing door 2B is released.

In the container 1, the opening/closing door 2B is in a state in which the locking portion 6a of the locking member 6 disposed in the opening/closing door 2B is engaged with the opening/closing member 5B of the opening/closing unit 5, and therefore, the opening/closing door 2B is not opened at this stage (fig. 6B).

However, when the front end side of the container 1 is further gradually raised, the opening/closing member 5b is separated from the locking portion 6a by the weight of the conveyed object, and thus the engagement with the locking member 6 is released.

Thus, as shown in fig. 6 (C), the opening/closing door 2b is opened.

Then, when the front end side of the container 1 is further raised and the container 1 is inclined at a larger angle, all the objects in the container 1 can be discharged by their own weight (fig. 6 (D)).

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 locking unit and/or the opening/closing unit constituting the container of the present invention can safely and automatically open and close the door easily by utilizing the inclination of the container and the weight of the transported object, and can be applied to all containers.