JP2001341973A - Bottom opening type container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom opening type container opening a bottom plate only by crane operation by performing a simple opening operation in advance. SOLUTION: A lifting block 48 is joined by a screw to the lower end of a suspending rod 33 for suspending the container, and a sleeve 41 is inserted, and opening-closing of an opening-closing arm 44 for locking a locking pin 13 of the bottom plate 11 on the lower end, is controlled by changing the height of the sleeve 41 by lifting of the lifting block 48 and the rotational direction of an operation lever 411 and by lifting a rocker arm 43 via the sleeve 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing and transporting loose objects such as earth and sand, scraps, and the like. More specifically, the present invention relates to a container which can be arbitrarily operated only by lifting and lowering a crane by performing a simple operation. The present invention relates to a bottom-opening container capable of opening and closing a bottom plate to discharge contents.

[0002]

2. Description of the Related Art In a portal crane such as an unloader installed on a quay, a grab bucket is used which grabs coal and earth and sand from a hold and discharges it. The lifting and opening and closing of the grab bucket can be performed remotely from the cab of the crane, but this can be done only with the grab bucket attached to the crane via a wire rope. Cannot be transported to another location. In the case of steel, scrap, etc., it can be lifted and hung by a lifting magnet, but when stacked, there is a drawback that only things close to the surface can be sucked. Therefore, the most efficient and general cargo handling means is by a container (bag), but in the case of a container, loading and discharging takes time and is not efficient. In addition, in the case of a container that opens and closes the bottom plate to discharge the contents, the operator who opens and closes the bottom plate cannot be seen by the crane driver, or the worker may be injured by the falling discharge. There was also the above problem.
Therefore, it is necessary to prepare in advance so that the bottom plate is automatically opened when the container is unwound and then re-wound after landing, so that workers do not have to be nearby when discharging the contents. Several proposed containers have been proposed.

FIG. 18 shows an example of such a container.
1 is a steel plate container, 11 is an openable bottom plate, 12 is a bottom plate opening / closing shaft, 14 is a side plate of the container, and the side plate is not opened and closed in the case of a container in which the contents are discharged only by the bottom plate 11. However, in this example, the side plate 14a in the front part is openable and closable in a double-opening manner, 15 is a side plate opening / closing axis, 3 is a lifting portion provided near the bottom plate 11 used when lifting the container 1 with a crane, 16 is this container 1
This is a fork hole for loading cargo with a forklift. In this figure, the roof part is left open, but it may be covered with a sheet or the like, and there is also a container with a structure in which the roof part is covered with a steel plate for taking in and out from the side.

FIG. 19 is a perspective view showing a state in which the container 1 is lifted using the lifting frame 2 and the bottom plate 11 is opened, and reference numeral 21 is used between the lifting frame 2 and the lifting section 3 of the container 1. Auxiliary wire rope, 13 is a locking pin attached near the end of the bottom plate 11, and 442 is a locking hook for locking this to the container 1 body side. FIG. 20 is a perspective view showing a state where the side plate 14 of the container 1 is opened.

In this type of container, the hook 442 is normally locked so that the bottom plate 11 does not open.
When discharging the contents, perform the operation of releasing the lock in advance, and then lift and land the
And the bottom plate 11 is opened. Although not shown in FIGS. 18 and 19, the opening / closing control mechanism for this is a hook portion.
442, that is, near the bottom plate 11.

As an example of the opening / closing control mechanism, Japanese Patent Application Laid-Open No. 11-34
The bottom-opening type container described in Japanese Patent No. 3094 will be described with reference to FIGS. FIG. 21 is a front view showing a state in which the bottom plate 11 of the container is closed, and FIG. 22 is a front view showing a state in which the bottom plate 11 is also opened, and the same reference numerals are used for components common to the description so far, 3c is a lifting arm, 4 is an opening / closing control mechanism, and W is a lifting wire rope.

FIG. 23 is a front view showing the opening / closing control mechanism 4. 33 is a suspension rod connected to the suspension arm 3c via the pin 32, 41 is a sleeve inserted through the suspension rod, 43 is a rocker arm attached near the lower end of the sleeve and raised and lowered together with the suspension rod, and 48 is a suspension rod Elevating block fixed by screw connection near the lower end, 45 is an intermediate link with one end connected to an elevating block 48, 44 is an intermediate link
Open / close arm connected to the other end of 45. A push-up spring 49c is inserted between the sleeve 41 and the lifting block 48. Further, an extension of the suspension rod 33 is screwed from below toward the lifting block 48, and this extension is inserted into a hole near the bottom of the container to serve as a guide for lifting and lowering the suspension rod 33. The opening / closing arm 44 can be opened and closed about a fixed pin 46 provided at the bottom of the container, and is attached to the bottom plate 11 of the container 1 with the lower hook portion 442 being substantially vertical as shown in FIG. The locking pin 13 is locked from the outside so as not to open. Further, the upper end of the opening / closing arm 44 has an S-shaped slit 441 and a lock pin.
The other end of the intermediate link 45 is connected to the upper intermediate portion as described above at the upper intermediate portion via the 431.

The lifting arm 3c has two arms extending in directions different from each other by 90 degrees with the pin 32 as the center of rotation. Each arm is provided with hanging holes 31a and 31b, and further near one of the arms near the center of rotation. A push-down pin 34 is attached.
In FIG. 23, since the lifting is to be performed using the suspension holes 31a on the side where the pressing pins 34 are attached, the pressing pins 34 are in the raised position, and the sleeve 41 is in the lifting rod 33.
Is in the ascending position with respect to.

FIG. 24 is a front view showing the open / close control mechanism 4 in different states. The difference from FIG. 23 is that the other hanging hole 31b of the lifting arm 3c is lifted.
As a result, the lifting arm 3c rotates 90 degrees, and the push-down pin 34 pushes down the head of the sleeve 41. As a result, the lifting block 48 is pushed down, so that the upper portion of the opening / closing arm 44 is pulled inward by the intermediate link 45, the hook portion 442 at the lower end is opened outward, and the locking pin 13 is opened, so that the bottom plate can be opened.

FIG. 25 shows the upper portions of the rocker arm 43 and the opening / closing arm 44. The opening / closing of the opening / closing arm 44, that is, (a) corresponds to FIG. 23 and (b) corresponds to FIG. An S-shaped slit 441 is provided at the top of the opening / closing arm 44,
Since the direction of the slit is vertical in each of the open and closed states, the lock pin 431 attached to the tip of the rocker arm 43 is pressed against the slit to maintain the state at that time.

Since the conventional opening / closing control mechanism 4 is configured as described above, an example of a method of using the container 1 will be described as follows. As shown in FIG. 23, when this container is being lifted using the hanging hole 31a on the side where the push-down pin 34 is located, the bottom plate does not open even if the container is moved or hung. Once lowered on the ground, the crane hook is attached to the other hanging hole 31b and lifted, the bottom plate is opened and the contents are discharged. After unloading, the container can be landed again with empty cargo, and if the hook is replaced, cargo handling can be performed with the bottom plate closed again.

As described above, the container described in Japanese Patent Application Laid-Open No. H11-343094 can be opened and the contents can be discharged only by lifting and lowering the container with a crane. However, this opening / closing control mechanism can achieve the intended purpose if it operates normally. However, since the opening / closing of the opening / closing arm 44 is controlled by the engagement between the S-shaped slit 441 and the lock pin 431, The opening / closing arm 44 may not be opened or closed unless the lock pin moves securely in the S-shaped slit, and a situation in which the operation is redone rarely occurs, and improvement has been desired.

Further, in the case of a container in which the side plate 14 can be opened and closed as shown in FIG. 20, there is a possibility that the opening and closing control mechanism 4 disclosed in Japanese Patent Application Laid-Open No. H11-343094 may interfere with the opening and closing of the side plate 14.

[0014]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and makes the opening / closing operation of the opening / closing arm 44 more reliable. An object is to realize a bottom-opening type container provided with a mechanism 4.

[0015]

The present invention comprises a side plate and a pair of bottom plates, an opening / closing shaft of a bottom plate attached near the bottom of the side plate, a locking pin provided near a tip of the bottom plate, and A pair of opening / closing arms that are pivotally supported by fixing pins fixed to the side plate and that can lock the locking pins at lower end portions;
An opening spring for urging the opening / closing arm in the opening direction, an elevating block locked on a lower surface of a locking claw provided at an upper intermediate portion of the opening / closing arm, and a suspension rod screwed to the elevating block. A sleeve inserted through the suspension rod, a rocker arm that engages with the sleeve by a set pin protruding toward a cut window provided near the lower end of the sleeve, moves up and down in conjunction with the sleeve, and is connected to the suspension rod. A lifting block, an operating lever provided integrally with the upper end of the sleeve, and an elevating guide for changing the height of the sleeve according to the rotation direction of the operating lever. The opening / closing arm is provided with an S-shaped slit for engaging the rocker arm in the open / close position in the open / close direction. A bottom open type container, characterized in that the.

Further, the present invention comprises a side plate and a pair of bottom plates, an opening / closing shaft of the bottom plate attached near the bottom of the side plate, a locking pin provided near a tip of the bottom plate, and a fixed member fixed to the side plate. A pair of opening / closing arms that are pivotally supported by the pins and that can lock the locking pins at their lower ends, an opening spring that biases the opening / closing arms in an opening direction, and a rotation vertically attached to the bottom of the side plate A rod and a set pin that is inserted into the rotatable rod so as to be able to move up and down, and protrudes toward a groove formed near the lower end of the rotatable rod according to the rotation direction of an operating lever provided integrally with the sleeve at the upper end of the rotatable rod. A lifting / lowering block that engages with the rotating rod and moves up and down in conjunction therewith; an intermediate link having one end connected to the upper end of the opening / closing arm; A lifting plate that is rotatable and has a suspension hole at an outer end thereof, and a pressing portion that locks the lifting block at the open / close position of the open / close arm above and below the fixed pin on the side surface of the open / close arm. It is a bottom opening type container characterized by being formed.

Alternatively, the present invention comprises a side plate and a pair of bottom plates, an opening / closing shaft of a bottom plate attached near the bottom of the side plate, a locking pin provided near a tip of the bottom plate, and fixed to the side plate. A pair of opening / closing arms that are pivotally supported by fixed pins and that can lock the locking pins at lower ends, an opening spring that biases the opening / closing arms in an opening direction, and are mounted on the bottom of the side plate so as to be able to move up and down. A cross-shaped flat lifting block, an operation handle in which a rotating shaft is fitted in a long hole formed in the vertical block in the vertical direction, and a tip or a root attached to the lifting block depending on the direction of the operation handle. A receiving pin on which a portion rests for positioning the elevating block, an intermediate link having one end connected to the upper end of the opening and closing arm, and a fixed end connected to the other end of the intermediate link; A lifting plate rotatable around a pin is provided, and a pressing portion is formed above and below the fixed pin on the side surface of the opening / closing arm to lock the lifting block at the opening and closing positions of the opening / closing arm. It is a bottom-opening type container.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The bottom-opening type container according to the present invention allows a lifting rod for lifting a container to be lifted and lowered with respect to a container side plate, instead of directly lifting the container when lifting it with a crane or the like. The provided bottom plate receiving link restrains the locking pin at the tip of the container bottom plate from below, and the locking pin is opened and the bottom plate can be opened only when the lifting rod is lowered with respect to the side plate by the open / close control mechanism. Therefore, if the release operation is performed, the bottom plate is released and the contents are discharged by landing the connate, and if the release operation is not performed, the cargo can be handled with the bottom plate closed.

[0019]

[Embodiment 1] A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing the bottom-opening type container 1 with a bottom plate closed, and FIG. 2 is a front view showing the same with the bottom plate opened. The same reference numerals are used for components common to the description so far. In addition, among the opening / closing control mechanism 4 for the bottom plate 11, 411 is an operation lever, and 442 is an operation lever 41.
A locking hook portion that opens and closes and locks the bottom plate 11 by the operation of the opening and closing control mechanism 4 to be described later with the operation of 1.

Next, the opening / closing control mechanism 4 will be described. 3 to 5 are partial front views showing the opening / closing control mechanism 4 in this embodiment in different states. 3a is a lifting block for hooking when lifting with a crane or the like, 33 is a lifting rod connected via the lifting block 3a, 41 is a sleeve that is inserted through the lifting rod 33 and can move freely in the axial direction, 43 is a sleeve. A rocker arm engaged via an engagement mechanism described below near the lower end of the
48 is an elevating block fixed by screw connection near the lower end of the suspension rod 33, 44 is an opening / closing arm that contacts a locking part on the side surface with the elevating block 48, and opens and closes using a fixed pin 46 provided at the container bottom as a fulcrum, 49a is an opening spring for urging the opening / closing arm 44 in the opening direction, and 442 is a bottom plate
The above-mentioned locking hook portion for locking the locking pin 13 so as not to open. The upper end of the opening / closing arm 44 is engaged with the vicinity of both ends of the rocker arm 43 via the S-shaped slit 441 and the lock pin 431.

That is, the opening / closing control mechanism 4 rotates the operating lever 411 in the horizontal direction to rotate the sleeve 41 integrated therewith, and locks the tip of the bottom plate 11 at the vertical position of the rocker arm 43 to be engaged. The opening and closing operation of the arm 44 is controlled, and the opening and closing operation is performed by the hanging rod 33. Next, the operation of the opening / closing control mechanism 4 will be described in comparison with the method of using the container 1. First, in FIG. 3, the operation lever 411 is located on the left side as viewed. By the action of the lifting guide 42 described later,
When the operation lever 411 is located on the left side, the sleeve 41 integral therewith is raised, and the rocker arm 43 engaged with this is also in the raised position. Therefore, the figure explained earlier
The relationship is the same as 25 (a), and the opening / closing arm 44 is
Restrained by 431 and unable to open.

If the container 1 is lifted by attaching a wire rope or the like to the lifting block 3a in this state, the lifting block 48 at the lower end of the lifting rod 33 lifts the container 1 through the locking claw 443 of the opening / closing arm 44. The container 1 can be freely moved while the bottom plate 11 is closed. Next, the container 1 is brought into a landing state and the operation lever 411 is set.
Rotate to the right. The sleeve 41 and the rocker arm 43 are engaged with each other by a cutting window 412 described later with reference to FIG. 9, and the sleeve 41 is integrated with the operation lever 411. Opening / closing arm 44 only by rotating operation lever 411
Is urged in the opening direction by the opening spring 49a and presses the lock pin 431, so that the rocker arm 43 does not fall down and no movement occurs inside yet.

Next, when the container 1 is to be lifted, the lifting block 48 pushes the locking claw 44 of the opening / closing arm 44, so that the pressing of the lock pin 431 is loosened and the S-shaped slit is formed.
The opening / closing arm 44 falls into the vertical groove portion of 441 and can be opened. However, since the lifting block 48 is in the raised position by lifting, the opening / closing arm 44 does not open yet. FIG. 4 shows the state of the opening / closing control mechanism 4 at this time.

When the container 1 is moved to a target unloading position while being lifted, and the container 1 is landed, the hanging rod
33 lifting force loosened, lifting block 48 and open / close arm
Since there is no contact pressure with the 44 locking claws 443, the open / close arm
44 is urged by an opening spring 49a to open and release the locking pin 13. FIG. 5 shows the state of the opening / closing control mechanism 4 at this time.
The upper end of the opening / closing arm 44 and the rocker arm 43 have the same relationship as that of FIG. When the container 1 is lifted again in this state, the bottom plate 11 is opened by the weight of the contents and the weight of the bottom plate 11, and the contents are discharged.

That is, this container 1 is
In the basic state where 1 is left-facing, the bottom plate 11 does not open, and the operation lever 411 is turned right to land.
Only when lifted, the bottom plate 11 opens. If the operation lever 411 is returned to the left, the landing is performed once, the bottom plate is closed, and then the operation lever 411 is lifted, the operation returns to the initial state. If the rocker arm 43 does not drop by its own weight even if the sleeve 41 is lowered,
It is desirable to appropriately insert an auxiliary spring that biases this downward.

FIG. 6 is a perspective view showing an elevating guide 42 which raises and lowers the sleeve 41 by rotating the operation lever 411. FIG. 7 is a developed view, in which a high position and a low position in the circumferential direction are connected by a slope portion 421. When the operation lever 411 is turned left, the sleeve 41 is raised, and when it is turned right, the sleeve 41 is lowered. FIG. 8 is a partial perspective view of the sleeve 41 showing a W-shaped cut window 412 formed at a lower portion of the sleeve 41, and FIG. 9 is a developed view. A set pin (not shown) projects from the rocker arm 43 fitted around the outer periphery of the sleeve 41 toward the inner sleeve 41 and engages with the cut window 412. sleeve
As the 41 rotates, the rocker arm 43
412 can be freely moved up and down within the vertical gap at that angle.

7 and 9 correspond to the numbers surrounded by a circle. The figure shows the basic state shown in FIG. 3, the state in which the operation lever 411 is turned rightward, and the figure in which the rocker arm falls in that state. State 4 is an intermediate state in which the operation lever 411 is turned counterclockwise to return to the state. As described above, if the operation lever 411 is turned to the left, the bottom plate of the container does not open, and all operations of lifting, lowering, laterally moving, and opening and closing the container can be performed only by operating the crane. No need to approach dangerous hanging loads. In addition, since the operation lever 411 is in the "closed" position can be clearly confirmed from a distance, all the workers in the vicinity can work with confidence. Embodiment 2 A second embodiment of the present invention will be described with reference to the drawings. Although the container of this embodiment is also a bottom-open type,
This is a type in which four points around the bottom illustrated in FIGS. 18 to 20 are suspended. Since the opening / closing control mechanism has many points in common with the first embodiment, the following description focuses on the differences.

FIGS. 10 and 13 are front views showing the opening / closing control mechanism 4 of this embodiment. 3b is a lifting plate protruding at the four bottom corners of the container 1, 31 is a lifting hole provided at the outer end thereof, and 45 is a lifting plate 3b. An intermediate link 41 connecting the upper end of the opening / closing arm 44 for restraining the bottom plate 11;
a is a rotating rod vertically mounted on the bottom of the side plate 14, and 444 (444a, 444b) are provided at two locations above and below the side surface of the opening / closing arm 44. A pressing portion for stopping, 481 is a spring receiving sleeve, and 49b is a push-down spring which assists the weight of the elevating block 48 and pushes it down.

The opening / closing control mechanism 4 rotates the operating rod 411 by rotating the operating lever 411. The opening / closing control mechanism 4 is inserted into the rotating rod 41a so as to be able to move up and down. Bottom plate 11 in 48 vertical position
The opening and closing of the opening / closing arm 44 for locking the tip of the arm is controlled, and the opening / closing operation is performed by the lifting plate 3b connected to the opening / closing arm 44 via the intermediate link 45.

Next, a method of using the container 1 will be described. Since the opening / closing control mechanism 4 is symmetrical, only one side will be described below. FIG. 11 shows the same basic state in which the bottom plate 11 is closed as in FIG. 10, and corresponds to the left half of FIG. The operation lever 411 is located on the left side when viewed. In this state, the lifting block 48 is engaged by the engagement between the groove 414 of the rotating rod 41a and the lifting block 48 which will be described later.
Is in the raised position. The opening / closing arm 44 is urged in the opening direction by an opening spring 49a, but is opened because the upper one 444a of the pressing portions provided at the upper and lower sides of the opening / closing arm 44 presses the lifting block 48. Can not do. Therefore, even if the container 1 is lifted or landed in this state, the bottom plate 11 does not open.

Next, in the landing state, the operation lever 411 is pulled toward the user and rotated rightward as shown by the arrow in FIG. The rotating rod 41a rotates and the elevating block 48 can be lowered, but the opening / closing arm 44 is moved by the opening spring 49a.
Since 48 is still pressed, it cannot descend yet. Subsequently, the container 1 is lifted by hanging a wire rope on the hanging hole 31. Lifting plate 3b is fixed pin 46
a, and the intermediate link 45 and the opening / closing arm 44 are drawn through the link pin 47, so that the lifting block 48 is released from the opening / closing arm 44 and falls, and is placed on the stepped portion of the lower one 444b of the pressing portions. It is an intermediate position. This state is shown in FIG.

When the container 1 arrives at the destination
Landing, the lifting force of the lifting plate 3b is loosened, the opening / closing arm 44 is opened by the action of the opening spring 49a, the lifting block 48 falls to the lower end and is pressed by the pressing portion 444b, and the opening / closing arm 44 is opened. Keep state. This state is shown in FIG. If the container 1 is lifted as it is, the bottom plate 11 is opened by the weight of the contents and the weight of the bottom plate 11, and the contents are discharged.

That is, the container 1 is provided with the operation lever 41
In the basic state where 1 is left-facing, the bottom plate 11 does not open, and the operation lever 411 is turned right to land.
Only when lifted, the bottom plate 11 opens. If the operation lever 411 is returned to the left, the landing is performed once, the bottom plate is closed, and then the operation lever 411 is lifted, the operation returns to the initial state. If the lifting block 48 does not drop reliably due to its own weight even when the rotating rod 41a rotates, it is desirable to appropriately insert a push-down spring 49b for urging the lifting block 48 downward. The spring receiving sleeve 481 receives this pressing force and transmits the same to the lifting block 48.

FIG. 14 shows a cross section of a portion of the rotating rod 41a where the groove 414 is formed, and FIG. 15 shows a perspective view of the groove 414 formed on the side surface of the rotating rod 41a. As in the first embodiment, an inner rotating rod is
A set pin (not shown) protrudes toward 41a
Is engaged. The groove portion 414 has a right-angled triangular shape with the hypotenuse as the lower side when it is unfolded.
14 has a vertical groove at the position A, and at the opposite side, that is, at the position B in FIG. 14, there is no vertex and there is no freedom in the vertical direction. The closed basic state of the bottom plate, that is, the state in which the operation lever 411 is turned to the left corresponds to the position B, and the state in which the release lever is turned to the right corresponds to the position A. A
At the position, the lifting block 48 is moved along the vertical groove of the groove 414.
When the operating lever 411 is returned to the left after
The lifting block 48 rises along the oblique side of 4 and returns to the B position. [Embodiment 3] A third embodiment of the present invention will be described with reference to the drawings. 16 and 17 are partial front views showing the main part of the opening / closing control mechanism of this embodiment, 48a is a cross-shaped flat lifting block, 482 is a long hole formed in the vertical direction near the center thereof,
413 is a cam having a rotating shaft inserted into the long hole 482,
Reference numeral denotes a receiving pin for positioning the elevating block 48a on the tip or the root of the cam 413.

This embodiment is a modification of the second embodiment, and is the same as the second embodiment except that the rotary rod 41a and the lifting block 48 are integrated into a flat lifting block 48a. It is. FIG. 16 shows the case where the cam 413 is in the upward vertical position, and FIG. 17 shows the case where the same is in the right horizontal position. . The cam 413 is rotated by appropriately attaching a spanner or a handle to a rotating shaft.

Since opening and closing are controlled by the vertical position of the lifting block 48a, which is exactly the same as in the second embodiment, further explanation will not be necessary. [Embodiment 4] In a fourth embodiment of the present invention, an opening / closing control is performed by raising and lowering a rocker arm 43 in FIGS. 3 to 5 by using a lifting mechanism (not shown) similar to that of the third embodiment. It is. That is, the portion of the rocker arm 43 that fits into the sleeve 41 is a flat plate having a cross shape similar to that shown in FIGS. 16 and 17, and the vertical position is determined by the operation handle, the pin, and the long hole.

[0037]

According to the present invention, a bottom-opening type container having an opening / closing control mechanism capable of controlling the opening and closing of the bottom plate of the container by reliable operation and capable of supporting a container whose side plate can be opened and closed is realized. It has an excellent effect that the efficiency of cargo handling work and the improvement of safety are achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing a bottom-opening type container according to a first embodiment of the present invention with a bottom plate closed.

FIG. 2 is a front view showing the bottom-opening type container according to the first embodiment of the present invention with a bottom plate opened.

FIG. 3 is a partial front view showing an opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 4 is a partial front view showing the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 5 is a partial front view showing the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 6 is a partial perspective view showing a part of the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 7 is a development view showing a part of the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 8 is a partial perspective view showing a part of the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 9 is a developed view showing a part of the opening / closing control mechanism according to the first embodiment of the present invention.

FIG. 10 is a partial front view illustrating an opening / closing control mechanism according to a second embodiment of the present invention.

FIG. 11 is a partial front view showing the opening / closing control mechanism according to the second embodiment of the present invention.

FIG. 12 is a partial front view showing an opening / closing control mechanism according to a second embodiment of the present invention.

FIG. 13 is a partial front view showing the opening / closing control mechanism according to the second embodiment of the present invention.

FIG. 14 is a cross-sectional view illustrating a part of an opening / closing control mechanism according to a second embodiment of the present invention.

FIG. 15 is a perspective view illustrating a part of an opening / closing control mechanism according to a second embodiment of the present invention.

FIG. 16 is a partial front view illustrating a main part of an opening / closing control mechanism according to a third embodiment of the present invention.

FIG. 17 is a partial front view showing a main part of the opening / closing control mechanism according to the third embodiment of the present invention.

FIG. 18 is a perspective view showing the bottom-opening type container according to the present invention with the bottom plate closed.

FIG. 19 is a perspective view showing the bottom-opening type container according to the present invention in a state where a bottom plate is opened.

FIG. 20 is a perspective view showing the bottom-opening type container according to the present invention in a state where a side plate is opened.

FIG. 21 is a front view showing a bottom-opening type container according to a conventional technique with a bottom plate closed.

FIG. 22 is a front view showing a bottom-opening type container according to a conventional technique with a bottom plate opened.

FIG. 23 is a front view showing an opening / closing control mechanism according to a conventional technique.

FIG. 24 is a front view showing an opening / closing control mechanism according to a conventional technique.

FIG. 25 is a partial front view showing a part of an opening / closing control mechanism showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Lifting frame 3 Lifting part 3a Lifting block 3b Lifting plate 3c Lifting arm 4 Opening / closing control mechanism 11 Bottom plate 12 Bottom plate opening / closing shaft 13 Locking pin 14 Side plate 15 Side plate opening / closing shaft 16, 22 Fork hole 21 Auxiliary wire rope 31 Hanging hole 32 pin 33 Suspension rod 34 Push-down pin 41 Sleeve 41a Rotating rod 42 Lifting guide 43 Rocker arm 44 Opening / closing arm 45 Intermediate link 46, 46a Fixing pin 47 Link pin 48, 48a Lifting block 49a Opening spring 49b Push-down spring 49c Push-up spring 411 Operating lever 412 Cut window 413 Cam 414 Groove 421 Inclined part 431 Lock pin 441 S-shaped slit 442 Locking hook 443 Locking claw 444 Pressing part 481 Spring receiving sleeve 482 Long hole 483 Receiving pin

Claims (3)

[Claims] 1. An opening / closing shaft (12) of a bottom plate (11), which is constituted by a side plate (14) and a pair of bottom plates (11), and is mounted near the bottom of the side plate (14), and a tip of the bottom plate (11). A pair of opening / closing arms which are pivotally supported by a locking pin (13) provided in the vicinity and a fixing pin (46) fixed to the side plate (14) and capable of locking the locking pin (13) at a lower end portion. (44) and an opening spring (49a) for urging the opening / closing arm (44) in the opening direction.
And an elevating block (48) locked on the lower surface of a locking claw (443) provided at an upper intermediate portion of the opening / closing arm (44).
A suspension rod (33) screw-connected to the lifting block (48), a sleeve (41) inserted through the suspension rod (33), and a cut window provided near the lower end of the sleeve (41). A rocker arm (43) which engages with the sleeve (41) with a set pin protruding toward (412) and moves up and down in conjunction therewith; a lifting block (3a) connected to the lifting rod (33); An operating lever (411) provided integrally with the sleeve (41) at the upper end of the sleeve (41)
And an elevating guide (42) for changing the height of the sleeve (41) according to the direction of rotation of the operating lever (411). The vicinity of both ends of the rocker arm (43) is at the upper end of the opening / closing arm (44). A bottom-opening container, wherein the open / close arm (44) is provided with an S-shaped slit (441) which is fitted to the rocker arm (43) in the left-right direction at each of the open / close positions. 2. An opening / closing shaft (12) of a bottom plate (11), which is composed of a side plate (14) and a pair of bottom plates (11), and is mounted near the bottom of the side plate (14), and a tip of the bottom plate (11). A pair of opening / closing arms which are pivotally supported by a locking pin (13) provided in the vicinity and a fixing pin (46) fixed to the side plate (14) and capable of locking the locking pin (13) at a lower end portion. (44) and an opening spring (49a) for urging the opening / closing arm (44) in the opening direction.
A rotating rod (41a) vertically attached to the bottom of the side plate (14), and inserted through the rotating rod (41a) so as to be able to move up and down, and provided integrally with the upper end of the rotating rod (41a). The groove (41) formed near the lower end of the rotating rod (41a) depends on the rotation direction of the operating lever (411).
4) Use a set pin that projects toward
a) Elevating block (48) that engages with and moves up and down in conjunction with
And an intermediate link (45) having one end connected to the upper end of the opening / closing arm (44), and connected to the other end of the intermediate link (45) and rotatable around a fixing pin (46a) to the outer end. A lifting plate (3b) having a suspension hole (31), the lifting block being located above and below the fixed pin (46) on the side surface of the opening / closing arm (44) at the opening / closing position of the opening / closing arm (44). Pressing part (444a, 444b) that locks (48)
A bottom-opening type container characterized by forming: 3. An opening / closing shaft (12) of a bottom plate (11), which is constituted by a side plate (14) and a pair of bottom plates (11), and is mounted near the bottom of the side plate (14), and a tip of the bottom plate (11). A pair of opening / closing arms which are pivotally supported by a locking pin (13) provided in the vicinity and a fixing pin (46) fixed to the side plate (14) and capable of locking the locking pin (13) at a lower end portion. (44) and an opening spring (49a) for urging the opening / closing arm (44) in the opening direction.
And a cruciform flat plate-like elevating block (48a) attached to the bottom of the side plate (14) so as to be able to ascend and descend, and a rotating shaft in a long hole (482) formed in the elevating block (48a) in the vertical direction. And a receiving pin (483) which is attached to the cam (413) fitted with the cam and the lifting / lowering block (48a), and whose tip or root portion is placed depending on the direction of the cam (413) to position the lifting / lowering block (48a). ), An intermediate link (45) having one end connected to the upper end of the opening / closing arm (44), and a lifting plate connected to the other end of the intermediate link (45) and rotatable around a fixing pin (46a). (3
b) above and below the fixed pin (46) on the side surface of the opening / closing arm (44), and a pressing portion () for locking the lifting block (48) at the opening and closing positions of the opening / closing arm (44). 444a, 444b)
A bottom-opening type container characterized by forming: