JP3060867B2 - Spreader for multi-stage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spreader for multi-stacking containers, and more particularly to an improvement in positioning accuracy of stacked containers.

[0002]

2. Description of the Related Art For example, when containers are stacked in a multi-stage manner using a container yard or the like, a spreader for container multi-stage stacking that prevents the stacked containers from being displaced in the width direction or the length direction and stably performs multi-stage stacking. However, for example,
It is disclosed in 246680 and JP-A-5-338985.

As shown in the side view of FIG. 15, a spreader 1 for a multi-stage product disclosed in Japanese Patent Application Laid-Open No. 5-246680 has a guide flipper 32 and a spreader body 31 provided with a hydraulic cylinder and a winch take-up mechanism. Lifting device 33 having
It is provided to be able to move up and down. Container 2 with spreader-1
When suspending the spreader, the guide flipper 32 is raised by the elevating device 33 so that the corner of the spreader body 31 is
The container 2 is fixed to the portion 34 by a fixing device and positioned on the spreader body 31 while being positioned by the guide flipper 32.
Hanging. Thereafter, the guide flipper 32 is lowered by the lifting device 33, and the lowered guide flipper 32 is moved.
Is fixed to the lower corner portion of the container 2 by a holding device having a hydraulic cylinder. Then, the container 2 suspended on the spreader-1 is moved onto another container arranged in advance, positioned by the guide flipper 32, and stacked.

[0004] Further, as shown in a perspective view of FIG. 16, a multi-stage spreader 1 disclosed in Japanese Patent Application Laid-Open No. 5-338895 has a longitudinal beam 41 at both ends in the longitudinal direction of the spreader-1.
Hollow vertical guide 4 rotatably held at the center of the outside
The container 2 is mounted on a movable beam 44 slidably attached to both ends of a hollow elevating and lowering horizontal beam 43 movable vertically with respect to the container 2.
A corner flipper 45 having a positioning projection that can be fitted into the fitting hole of the lower corner fitting is fixed. When stacking the containers 2 suspended on the spreader-1, the vertical guide 42 is rotated to the vertical position by the tilting cylinder 46 that rotates the vertical guide 42, and the vertical drive cylinder 47 housed in the vertical guide 42. Up and down cross beam 4
3 is lowered to a predetermined position, and the horizontal drive cylinder 4
8 to move the movable beam 44 inward to make the corner flipper
The alignment projection 45 is fitted into the fitting hole of the lower corner fitting of the container 2, and the corner flipper 45 is fixed to the lower corner of the suspended container 2. Then, the container 2 suspended on the spreader-1 is moved onto another container arranged in advance, positioned by the corner flipper 45, and stacked. When the container 2 is set on the lower container, the movable beam 44 is moved outward by the horizontal driving cylinder 48, the corner flipper 45 is removed from the container 2, and the vertical beam 4 is moved by the vertical driving cylinder 47.
3 is lifted, the vertical guide 42 is tilted outward by the tilt cylinder 46, and then the suspension of the container 2 is released.

[0005]

In each of the above conventional multi-stage spreaders, the guide flipper or the corner flipper is moved with respect to two surfaces orthogonal to the front or rear surface and the side surface of the container. The fixing is disadvantageous in that the weight of the moving guide flipper and corner flipper is increased and the driving device for moving the guide flipper and the like is complicated. For this reason, the lifting device for lifting and lowering the guide flipper and the like and the driving device have to be provided with a strong rigid structure that can withstand the weight.

Further, two orthogonal surfaces of a container are gripped by one guide flipper or corner flipper.
Since the perpendicularity and parallelism of the two orthogonal surfaces of the corner of the container vary, and the parallelism between the cross beam at the front and rear of the spreader and the front and rear of the container has a deviation,
It is difficult to properly bring the gripping surfaces of the guide flipper and the corner flipper into contact with the two surfaces of the container, and when stacking containers, the horizontal force applied by the lower container causes the guide flipper and the corner flipper to move. There is a danger that the position of the corner flipper is shifted and the stacking accuracy is reduced, and that the bending moment acting on the elevating device acts to deform each member.

SUMMARY OF THE INVENTION The present invention has been made to solve such a disadvantage, and an object of the present invention is to provide a spreader for a multi-stage container in which a guide flipper can be accurately fixed to a container and positioned with a simple structure. It is assumed that.

[0008]

SUMMARY OF THE INVENTION A spreader for a multi-tiered container according to the present invention is attached to each of the transverse beams at both ends in the longitudinal direction of the spreader, and moves vertically in accordance with the front and rear surfaces of the suspended container. The vertical cross beam to be moved and the lower inner surface protruding from the lower end of the vertical cross beam are fixed to both ends of the vertical
A fixed guide flipper having a guide surface inclined toward the bottom, and attached to both ends of the lifting / lowering cross beam,
The lower inner surface protruding from the end slopes outward
A movable guide flipper having a guide surface and movable in a direction perpendicular to both end surfaces of the lifting / lowering cross beam; and a movable guide flipper.
And a moving mechanism that is attached to the inner surface of the container side and fits into the fitting hole of the lower corner fitting of the container, and a moving mechanism that is attached to the elevating beam and moves the movable guide flipper in the horizontal direction. It is characterized by.

The movable guide flipper is moved by a vertical pin.
It is preferable to connect the moving mechanism with a pin .

Another spreader for stacking containers according to the present invention is attached to each longitudinal beam at both ends in the longitudinal direction of the spreader, and the spreader moves up and down along the front and rear surfaces of the suspended container. A cross beam and both ends of the lifting cross beam are fixed parallel to the front and rear surfaces of the container ,
The inside of the lower part protruding from the lower end of the lifting beam is directed outward
A fixed guide flipper having a guide surface inclined with
Attached to both ends of the elevating beam, the lower end of the elevating beam is
A guide surface that slopes outward on the lower inner surface that protrudes
A movable guide flipper that is slidable along the elevating horizontal beam, a movable guide flipper rotatably attached to the movable guide flipper at the corner on the container side with a vertical pin, and a movable guide. A positioning projection that is attached to the inner surface of the flipper on the container side and fits into the fitting hole of the lower corner fitting of the container, one end of which is rotatably attached to the elevating cross beam with a vertical pin, and the other end of which is a movable guide flipper. −
And a moving mechanism having a cylinder rotatably mounted with a vertical pin.

[0011]

According to the present invention, a guide flipper fixed to a lower corner portion of a moving container and positioned with respect to a lower container is positioned with respect to a fixed guide flipper for positioning the front and rear surfaces of the container and a side surface of the container. Separate from the movable guide flipper. The fixed guide flipper is fixed to both ends of the vertical beam that moves vertically along the front and rear surfaces of the container suspended by the spreader, and the movable guide flipper can move in the direction perpendicular to both end surfaces of the vertical beam. , And the movable guide flipper is moved in the horizontal direction by a moving mechanism unit attached to the vertical beam. Fixed guide flipper and movable guide flipper
The inside of the lower part protruding from the lower end of the lifting beam is directed outward
To provide an inclined guide surface
The position of the Dar is corrected along each guide surface. The movable guide flipper - fitted to the container the container alignment protrusion provided on the side lower corner fittings fitting hole of the movable guide off to the side of the container ripper - - moving the movable guide flipper of fixing the.

Further, the movable guide flipper and the moving mechanism are pin-coupled with a vertical pin to make the movable guide flipper rotatable, so that the inner surface of the movable guide flipper and the side surface of the container are reliably brought into surface contact.

Further, the movable guide flipper is rotatably mounted on a movable guide flipper holding portion which slides along a vertical beam at a position close to the container by a vertical pin, and one end of the movable guide flipper is farther from the movable guide flipper than the container. The movable guide flipper is moved from the front to the side while moving the movable guide flipper in the horizontal direction by driving the cylinder. By turning, the inner surface of the movable guide flipper is brought into surface contact with the side surface of the container to obtain an appropriate frictional force.

[0014]

1 and 2 show an embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a side view. As shown in the figure, both ends of the both-end cross beam 3 provided in the longitudinal direction of the spreader-1 for transporting the container 2 are provided with fitting holes of the lower corner fitting at positions corresponding to the fitting holes of the lower corner fitting of the container 2. A similar fitting hole 3a is provided, and a winding device 4 is provided at the center of the cross beam 3 at both ends. Elevating horizontal beams 6 are attached to the ends of the wires 5 which are raised and lowered by the winding device 4 in parallel with the horizontal beams 3 at both ends. Fixed guide flippers 7 are fixed to both ends of the lifting beam 6 in parallel with the front and rear surfaces of the container 2. Also, as shown in the partial cross-sectional view of FIG. 3, horizontal drive cylinders 8 that move the piston rod outward in a horizontal direction orthogonal to both end surfaces of the vertical beam 6 are provided inside both ends of the vertical beam 6, A movable guide flipper 9 having an inner surface parallel to the side surface of the container 2 is attached to the tip of the piston rod of the horizontal drive cylinder 8. On the inner surface of the movable guide flipper 9 on the container 2 side, as shown in the perspective view of FIG. 4, a positioning projection 10 that fits into the fitting hole 3a of the both-end cross beam 3 and the fitting hole of the lower corner fitting of the container 2. Is installed. Guide surfaces 7a and 9a which are inclined outward are provided on the lower inner surface of the fixed guide flipper 7 and the movable guide flipper 9 projecting from the lower ends of the lifting / lowering cross beams 6. Tapered portions 7b and 9b are provided at the ends of the fixed guide flipper 7 and the movable guide flipper 9 close to each other as shown in the plan view of FIG. The movable guide flipper 9 is moved without interfering with the fixed guide flipper 7 so that the inner surface of the movable guide flipper 9 comes into surface contact with the side surface of the corner of the container 2 to generate a sufficient frictional force. Has become.

When the spreader 1 constructed as described above is moved by an empty load, the movable guide flippers 9 are moved outward by driving the horizontal drive cylinders 8 provided in the lifting and lowering beams 6. The lifting beam 4 by the winding device 4
Is raised to the position of the cross beam 3 at both ends. When it is detected by the upper end detector (not shown) that the lifting / lowering cross beam 6 has risen to the predetermined position, the lifting of the lifting / lowering cross beam 6 is stopped, the horizontal drive cylinder 8 is returned, and the movable guide flipper 9 is moved inward. Then, the positioning protrusion 10 provided on the inner surface of the movable guide flipper 9 is fitted into the fitting hole 3a of the cross beam 3 at both ends. By inserting the positioning protrusions 10 into the fitting holes 3a of the both-end horizontal beam 3, the lifting / lowering horizontal beam 6 can be fixed to the both-end horizontal beam 3, and the lower portions of the fixed guide flipper 7 and the movable guide flipper 9 can be fixed. The inner surfaces of the fixed guide flipper 7 and the movable guide flipper 9 are brought into close contact with the front and rear surfaces and the side surfaces of the respective corner portions of the both-ends cross beam 3 with the guide surfaces 7a, 9a of the two end portions projecting from the lower portions of the both-end cross beams 3. Can be fixed. When the fixed guide flipper 7 and the movable guide flipper 9 are fixed to the respective corners of the horizontal beam 3 at both ends, only the movable guide flipper 9 needs to be moved in one direction by the horizontal drive cylinder 8. Therefore, the horizontal drive cylinder 8 can be reduced in size, and the moving mechanism can be simplified.

In this state, the spreader-1 is moved to the container lifting position, and the spreader-1 is gradually lowered on the predetermined container 2, and the spreader-1 is placed on the container 2.
After confirming that the container 1 has been reached, the twist lock pins at the four corners of the lower surface of the spreader 1 are rotated to grip and fix the container 2. As described above, when the container 2 is gripped by the spreader-1, the crane for moving the spreader-1 is used.
Spreader-1 due to wind positioning and positioning errors
In some cases, the relative position between the spreader-1 and the container 2 is deviated due to the runout, and a long time is required for positioning. However, fixed guides are provided from the lower part of each corner of the cross beam 3
Since the inclined guide surfaces 7a and 9a of the flipper 7 and the movable guide flipper 9 project, the position of the spreader 1 with respect to the container 2 can be corrected along the respective guide surfaces 7a and 9a. Container 2 in a short time without
The spreader-1 can be positioned with respect to.

When the container 2 suspended on the spreader 1 is moved onto another container arranged in advance and sequentially stacked, the container 2 is gripped and fixed on the spreader 1 and then horizontally driven. Then, the movable guide flippers 9 are moved outward by driving the cylinders 8 to pull out the positioning projections 10 from the fitting holes 3a of the both-end horizontal beams 3, and the fixing of the lifting / lowering horizontal beams 6 to the both-end horizontal beams 3 is released. After that, the lifting / lowering cross beam 6 is lowered by the winding device 4,
When the lower end detector (not shown) detects that the container 2 has descended to the lower end, the lowering of the lifting / lowering cross beam 6 is stopped, the horizontal driving cylinder 8 is returned, and the movable guide flipper 9 is moved inward, and the movable guide is moved. The positioning protrusion 10 provided on the inner surface of the flipper 9 is fitted into the fitting hole of the lower corner fitting of the container 2. By inserting the positioning protrusion 10 into the fitting hole of the lower corner fitting of the container 2, the lifting / lowering cross beam 6 can be fixed to the lower end of the container 2, and the fixed guide flipper 7 and the movable guide flipper 9 can be fixed. Lower guide surfaces 7a, 9
The inner surface of the fixed guide flipper 7 and the inner surface of the movable guide flipper 9 can be brought into surface contact with the front and rear surfaces and the side surfaces of each lower corner portion of the container 2 in a state where a protrudes from the lower end of the container 2.

Thereafter, the container 2 is spread by the spreader-1.
While suspending the container, the container is moved onto another container arranged in advance, and the spreader-1 is gradually lowered to stack the suspended container 2 on the lower container.
When the suspended container 2 is stacked on the lower container in this manner, the inclined guide surfaces 7a, 9a of the guide flipper 7 and the movable guide flipper 9 projecting from the lower part of the suspended container 2 are connected to the lower container. The container 2 suspended by the spreader-1 can be accurately positioned in the lower container even if the container 2 hangs by the wind, etc. Can be shortened. After this stacking is completed, the horizontal drive cylinder 8 is driven to move the movable guide flippers 9 outward, respectively, to pull out the alignment projections 10 from the fitting holes of the lower corner metal fittings of the container 2, and move up and down with respect to the container 2. The fixing of the cross beam 6 is released, and the process moves to the next container transport operation.

In the above embodiment, the case where the movable guide flipper 9 is directly connected to the piston rod of the horizontal drive cylinder 8 attached to the vertical beam 6 has been described.
7 and the front view of FIG. 7, the moving mechanism 11 directly connected to the piston rod of the horizontal drive cylinder 8.
Alternatively, the movable guide flipper 9 may be pin-connected with the vertical pin 12. When the movable guide flipper 9 is made rotatable in this way, when the inner surface of the movable guide flipper 9 is brought into surface contact with the side surface of the container 2, the perpendicularity of the side surface of the container 2 to the front and rear surfaces is accurate. Even if the parallelism between the front surface of the container 2 and the elevating cross beam 6 is not accurate, it is possible to obtain an appropriate frictional force between the inner surface of the movable guide flipper 9 and the side surface of the container 2. The positioning accuracy when stacking containers can be further improved.

In each of the above embodiments, the left and right movable guide flippers 9 are moved by separate hydraulic cylinders. However, as shown in the front view of FIG. A compression spring 13 is disposed between the flipper 9 and the left and right movable guide flippers.
Wire rope 1 pulled by lifting roller 14 between spaces 9
5, the movable guide flipper 9 is normally held in a state of protruding outward, and when the container is positioned, the lifting roller 14 is raised by a winch provided on the driving cylinder 16 or the both-end lateral beam 3 to move left and right. The guide flippers 9 may be brought into surface contact with the lateral beams 3 at both ends and the side surfaces of the container 2. In this case, move the left and right movable guide flippers 9
It can be moved by the individual drive cylinders 16 and winches, and the weight of the container positioning mechanism can be reduced.

Further, in each of the above embodiments, the case where the movable guide flipper 9 is provided so as to protrude outside the side surface of the container 2 has been described. However, as shown in the plan view of FIG. 9 and the front view of FIG. The position near the container 2 of the movable guide flipper 9 is slidably attached to the distal end portion of the movable guide flipper-holding portion 17 having the fixed guide flipper 7 at the distal end by the vertical pin 18 so as to slide along the cross beam 6, The tip of a piston rod of a sliding / swinging cylinder 19 rotatably mounted on a horizontal beam 6 in a horizontal plane is rotatably attached to a position outside the container 2 of a movable guide flipper 9 so as to be rotatable. When the spreader 1 is moved, the movable guide flippers 9 can be arranged on the front and rear surfaces of the container 2 when the spreader 1 is moved. That.

In the case where the movable guide flipper 9 is given horizontal movement and turning as described above, when the spreader 1 is moved with an empty load, or when the container 2 is suspended and moved, FIG. 9. As shown in FIG. 10, the piston rod of the sliding / revolving cylinder 19 is pulled back, the movable guide flipper-holding portion 17 is stored in the elevating cross beam 6, and the movable guide flipper 9 is arranged in parallel with the elevating cross beam 6. Then, the end of the movable guide flipper 9 does not protrude in the width of the container 2, that is, in the transverse direction.

When the container 2 is gripped by the spreader-1, the spreader 6 is lifted with the up-down beam 6 raised.
After confirming that 1 has reached the upper end of container 2, slide
The turning cylinder 19 is driven. The movable guide flipper-holding portion 17 is driven by driving the sliding / turning cylinder 19.
Is pulled out from the lifting / lowering cross beam 6, and the movable guide flipper 9
Is moved outward while sliding along the front and rear surfaces of the container 2, and is disengaged from the front and rear surfaces of the container 2, turning as shown in the plan view of FIG. 11 and the side view of FIG.
The inner surface of the movable guide flipper 9 is brought into surface contact with the side surface of the container 2, and the positioning protrusion 10 is fitted into the fitting hole 3 a of the transverse beam 3 at both ends.
To fit. When the spreader-1 is positioned with respect to the container 2 by the fixed guide flipper 7 and the movable guide flipper 9 and the container 2 is gripped and fixed by the spreader-1, the piston rod of the cylinder 19 for sliding and turning is returned. The movable guide flippers 9 are arranged on the front and rear surfaces of the container 2. Then, the container 2 is transported to a predetermined position by the spreader-1.

When the transported containers 2 are stacked in a multi-stage manner, the steady rest control and the position error correction control are performed immediately before the stacking, and then the lifting / lowering cross beam 6 is lowered along the container 2. The movable guide flipper 9 is slid and swiveled by driving the sliding / swiveling cylinder 19 to bring the inner surface of the movable guide flipper 9 into surface contact with the side surface of the container 2 so that the positioning protrusion 10 is moved to the container 2. Into the fitting hole of the lower corner fitting. Then, the containers 2 suspended by the spreader 1 are positioned and stacked with respect to the lower container by the fixed guide flipper 7 and the movable guide flipper 9.

By keeping the movable guide flipper 9 so as not to protrude beyond the width of the container 2, the spreader body and the suspended container 2 are shaken by the wind or the like when the spreader 1 is moved. Even if the movable guide flipper 9 is displaced in the transverse direction, it is possible to avoid the transverse direction interference between the movable guide flipper 9 and an adjacent container.

Although the above embodiment has been described with reference to the case in which one movable cylinder flipper 9 is given horizontal movement and rotation by one slide / rotation cylinder 19, the plan view of FIG. As shown in the plan view showing the operation state, even if the sliding cylinder 19a and the turning cylinder 19b are separately provided, the same operation as the above embodiment can be achieved.

[0027]

As described above, according to the present invention, a guide flipper fixed to the lower corner portion of a moving container and positioned for the lower container is provided with a fixed guide flipper for positioning the front and rear surfaces of the container. Separated into a movable guide flipper that positions the side of the container,
Since only the movable guide flipper is moved in the horizontal direction, the weight of the guide flipper that moves when positioning the container can be reduced. This fixed guide
Lower end of vertical beam of flipper and movable guide flipper
Guide that slopes outward on the more protruding lower inner surface
Surface and position the spreader relative to the container
By modifying along the inner surface, you can save time
Positioning the spreader relative to the container between
Can be.

Further, since the movable guide flipper is moved only in the horizontal direction, the moving mechanism can be simplified.

Furthermore, the movable guide flipper and the moving mechanism are pin-coupled with a vertical pin, and the movable guide flipper is made rotatable, so that the inner surface of the movable guide flipper and the side surface of the container are brought into reliable surface contact. And a more appropriate frictional force can be obtained.

Further, the movable guide flipper is rotatably mounted on a movable guide flipper holding portion which slides along a vertical beam at a position near the container of the movable guide flipper with a vertical pin, and one end is located farther from the container of the movable guide flipper. The movable guide flipper is moved from the container by turning and pivoting the movable guide flipper in the horizontal direction. Spreader without protruding
Therefore, even when the spreader body and the suspended container are displaced in the traverse direction due to wind or the like when the spreader is moved, the spread of the movable guide flipper and the adjacent container in the traverse direction can be prevented. Interference can be avoided and the container can be stably transported.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a partial side view of the embodiment.

FIG. 3 is a sectional view showing a part of the embodiment.

FIG. 4 is a perspective view showing a movable guide flipper.

FIG. 5 is a plan view showing a part of the embodiment.

FIG. 6 is a partial sectional view showing a second embodiment.

FIG. 7 is a front view showing a part of the second embodiment.

FIG. 8 is a front view showing a third embodiment.

FIG. 9 is a plan view showing a part of the fourth embodiment.

FIG. 10 is a front view showing a part of the fourth embodiment.

FIG. 11 is a plan view showing an operation state of the fourth embodiment.

FIG. 12 is a front view showing an operation state of the fourth embodiment.

FIG. 13 is a plan view showing a part of the fifth embodiment.

FIG. 14 is a plan view showing an operation state of the fifth embodiment.

FIG. 15 is a front view showing a conventional example.

FIG. 16 is a perspective view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spreader 2 Container 3 Both ends horizontal beam 6 Elevating horizontal beam 7 Fixed guide flipper 8 Horizontal drive cylinder 9 Movable guide flipper 10 Positioning convex part

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tatsuya Nakajima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (56) References JP-A-5-338985 (JP, A) JP-A Sho51 JP-A-28956 (JP, A) JP-A-6-255978 (JP, A) JP-A-5-338986 (JP, A) JP-A-60-128189 (JP, A) JP-A-55-135088 (JP, A) 1) 156182 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66C 1/10

Claims (3)

(57) [Claims] 1. A lift cross beam which is attached to a longitudinal beam at both ends in the longitudinal direction of a spreader and moves vertically in accordance with the front and rear surfaces of a suspended container, and the front and rear surfaces of the container at both ends of the lift beam. in parallel to fixed and, lifting
To the outside on the lower inner surface protruding from the lower end of the cross beam
A fixed guide flipper having an inclined guide surface, and attached to both ends of the elevating cross beam, protruding from the lower end of the elevating cross beam.
The inner surface of the lower part has a guide surface that slopes outward.
And, lifting the lateral beam both end surfaces perpendicular to the direction movable in the movable guide flipper - a movable guide flipper - mounted in the inner surface of the container side, a positioning convex portion fitted into the fitting hole of the bottom corner fitting of the container Attached to the lifting beam
A spreader for container multi-stage stacking, comprising: a moving mechanism for moving a movable guide flipper in a horizontal direction. 2. The movable guide flipper is fixed by a vertical pin.
2. The spreader for container multi-level stacking according to claim 1, wherein the spreader is pin-connected to the moving mechanism . 3. A lifting beam which is attached to each of the longitudinal beams at both ends in the longitudinal direction of the spreader, and which moves vertically in accordance with the front and rear surfaces of the suspended container, and the front and rear surfaces of the container at both ends of the lifting beam. in parallel to fixed and, lifting
To the outside on the lower inner surface protruding from the lower end of the cross beam
A fixed guide flipper having an inclined guide surface, and attached to both ends of the elevating cross beam, protruding from the lower end of the elevating cross beam.
The inner surface of the lower part has a guide surface that slopes outward.
A movable guide flipper that slides along the elevating beam, a movable guide flipper that is rotatably attached to the movable guide flipper at the corner on the container side with a vertical pin, and a movable guide flipper. And a positioning protrusion fitted into the fitting hole of the lower corner fitting of the container, one end of which is rotatably attached to the elevating horizontal beam with a vertical pin, and the other end of which is attached to the movable guide flipper. And a moving mechanism having a cylinder rotatably mounted with a vertical pin.