Container inclined lifting appliance

Abstract

The utility model discloses an inclined lifting appliance for a container. The lifting appliance comprises a support lever group, a sling group and a lifting frame which are sequentially arranged from top to bottom, the support lever group is connected with the lifting frame through the sling group; the lifting frame is a rectangular frame body, a transmission shaft is arranged in the middle of the lifting frame in the length direction in a rotating mode, box corner assemblies with built-in rotating locks, connecting columns and limiting bolts are arranged at the four top corners of the lifting frame, the rotating locks are arranged in a rotating mode, and the limiting bolts are arranged in an up-down telescopic mode to limit rotation of the rotating locks. The two connecting columns at each end of the hanging frame are connected with the transmission shaft through the locking mechanism so as to drive the rotary lock to rotate through the transmission shaft; a portal crane pulling plate assembly is arranged on the transmission shaft and is connected to the supporting lever through a sliding sling, and the transmission shaft is driven to rotate in a reciprocating mode by lowering / lifting the sliding sling; according to the lifting appliance, the portal crane can lift / lower the lifting appliance and lock and release the lifting appliance and the container, so that the inclination operation of the container is completed, the labor cost is reduced, and the operation efficiency and the safety are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gantry crane lifting facilities, and in particular to a container tilting spreader. Background Technology

[0002] Bulk container handling, including unloading and loading, is a relatively complex operation. The conventional method involves using a gantry crane to suspend two support ropes at one end of the container and two opening / closing ropes at the other. By controlling the different lifting heights of the support and opening / closing ropes on the gantry crane, the container can be tilted at the required angle to allow cargo to be unloaded into the ship's hold. However, this operation requires manual assistance from the gantry crane to lock the container. Specifically, dockworkers climb onto the container and sequentially connect the ends of the two support ropes and two opening / closing ropes to the keyholes at the four corners of the container using container locks. This is not only inefficient but also poses a safety risk as workers need to be elevated above the container. Therefore, to improve efficiency and reduce safety hazards caused by manual operation, it is necessary to develop a dedicated quick-connect spreader for container tilting operations. This spreader should have an automatic locking function between the container and the spreader, forming a secure connection to ensure the stability of the tilting operation and reduce the dangers and inefficiencies of manual operation. Utility Model Content

[0003] The purpose of this utility model is to provide a container tilting spreader that solves the above-mentioned technical problems.

[0004] Another objective of this invention is to provide a method for tilting lifting operations using the aforementioned container tilting spreader.

[0005] Therefore, the technical solution of this utility model is as follows:

[0006] A container tilting spreader includes, from top to bottom, a support assembly, a sling assembly, and a lifting frame. The support assembly consists of two supports arranged horizontally and at intervals. Each support has two upper lifting lugs at both ends of its top surface and two lower lifting lugs at both ends of its bottom surface. The sling assembly consists of four slings, with their top ends connected to the four lower lifting lugs of the two supports and their bottom ends connected to the four corners of the lifting frame. The lifting frame includes two alternating and vertically arranged long beams and two short beams. Each pair of adjacent long and short beams is connected and fixed to each other via a corner assembly to form a rectangular frame. A drive shaft passes horizontally through a through hole in the middle of the two short beams and is freely rotatable. The corner assembly includes a rotary lock, a connecting post, and a limit bolt installed within the housing. A mounting plate is fixed to the inner wall of the housing parallel to the top surface of the lifting frame. The rotary lock and limit bolt are mounted along... The lifting frame is spaced along its length and movably mounted on the mounting plate, allowing the rotary lock to rotate freely. The limit bolt is telescopic, initially abutting against the first outer annular boss on the rotary lock via its third outer annular boss, and separating from the rotary lock as it moves upward against the top surface of the container at its bottom end. Connecting columns are located adjacent to and connected to the rotary lock. Two connecting columns located at both ends of each short beam are connected to the drive shaft via a locking mechanism, so that when the drive shaft rotates, the two rotary locks rotate to the locked state in cooperation with the locking mechanism and the connecting columns. A gantry crane pull plate assembly is provided on the drive shaft near one side of the short beam. The gantry crane pull plate assembly includes a gantry crane pull plate, which is a right-angled triangular plate. Its right-angled apex is fitted and fixed on the drive shaft, and a strip-shaped through hole is between its two base corners. A sliding block is slidably installed in the strip-shaped through hole, which is connected to the middle of the bottom surface of the adjacent side support bar via a sliding sling.

[0007] Furthermore, multiple support beams are fixed at intervals along the length of the rectangular frame, and the top surface of each support beam is lower than the top surface of the hanging frame; a U-shaped mounting bracket is centrally located on the top surface of the support beam near one of the short beams, and a bearing is centrally fixed on the top surface of the remaining support beams. Both the U-shaped mounting bracket and the bearing have central shaft holes coaxial with the through holes on the short beams. Rotary bearings are installed in the central shaft holes, so that the drive shaft is simultaneously horizontally inserted and fixed in the rotary bearings in each central shaft hole.

[0008] Furthermore, at least one clamping plate is provided on the outer wall of the two short beams of the lifting frame, and at least two clamping plates are provided at intervals on the outer wall of the two long beams of the lifting frame; the clamping plate is composed of a vertical plate and an inclined plate connected from top to bottom, with the vertical plate fixed on the outer wall of the beam, and the inclined plate set obliquely to the outside of the lifting frame, so that the lifting frame is clamped to the top outer wall of the container by multiple clamping plates arranged circumferentially.

[0009] Furthermore, a first mounting hole and a third mounting hole are provided on the mounting plate and the bottom plate of the housing, which are connected vertically. The rotary lock is integrally formed by connecting the lock head, the lock pin, and the wedge-shaped lock block in sequence from top to bottom. A second connecting sleeve is fitted and fixed on the upper part of the lock pin. The upper side wall of the second connecting sleeve extends horizontally outward to form a connecting plate, and a first outer annular boss is provided on its lower side wall. A third connecting sleeve is fitted in the middle of the lock pin. The third connecting sleeve is inserted and fixed in the first mounting hole and is limited on the mounting plate by the second outer annular boss provided on the top outer wall. A fourth connecting sleeve is fitted in the lower part of the lock pin. Its top end is fixedly connected to the bottom end of the third connecting sleeve, and its bottom end passes through and is fixed in the third mounting hole. The rotary lock is set to rotate freely in the third and fourth connecting sleeves. The wedge-shaped lock block at its bottom end passes through the third mounting hole to the outside of the housing. The connecting pin is set vertically, and its bottom end is fixed on the connecting plate.

[0010] Furthermore, a second and a fourth mounting hole are provided on the mounting plate and the bottom plate of the housing, which are vertically connected. The limiting bolt is inserted into the second and fourth mounting holes from top to bottom, and a fifth connecting sleeve is fitted and fixed on the top of the bolt. The outer wall of the fifth connecting sleeve is provided with a third outer annular boss, and the position of the third outer annular boss is adapted to the position of the first outer annular boss, so that the outer wall of the third outer annular boss is initially pressed against the outer wall of the first outer annular boss, thus restricting the rotation of the turnlock. A spring is fitted on the limiting bolt located between the mounting plate and the bottom plate of the housing, and the bottom end of the limiting bolt is higher than the bottom end of the turnlock. When the turnlock is inserted into the turnlock lock eye of the container, the bottom end of the limiting bolt abuts against the top surface of the container and compresses the spring upward, thus releasing the limiting bolt from restricting the rotation of the turnlock.

[0011] Furthermore, the locking mechanism includes a transmission frame and two second transmission rods; wherein, the transmission frame includes two parallel and spaced transmission plates, with one end of the transmission shaft passing through the center vertically and fixed to the two transmission plates; two first transmission rods are symmetrically arranged on both sides of the transmission shaft and fixed between the two transmission plates in a manner parallel to the transmission shaft; two second transmission rods are symmetrically arranged on both sides of the transmission frame; the two ends of each second transmission rod are movably connected to the rod body of the first transmission rod and the column body of the connecting column through universal joints.

[0012] Furthermore, an indicator plate is fitted and fixed on the drive shaft, which is set at an angle to the right or left when the drive shaft is in its initial state, so that it changes to be set at an angle to the left or right after the drive shaft rotates.

[0013] Furthermore, one end of the drive shaft extends to the outside of the hanging frame, and a manual pull plate is fitted and fixed at the end, with a pull rope connected to each end of the manual pull plate.

[0014] Furthermore, below the drive shaft of the gantry crane pull plate assembly, a support beam is provided along the width direction of the hanging frame. A portal frame is centrally located on the support beam, so that the gantry crane pull plate assembly is built into the portal frame. The sliding cable is stretched diagonally from the support bar to the rear side of the portal frame and then connected to the sliding block.

[0015] Compared with existing technologies, this container tilting spreader allows the driver to independently align and lock / release containers, and can tilt them. The entire operation does not require worker assistance, avoiding the time spent by workers loading and unloading containers, locking and releasing container locks, reducing wasted time, and improving the overall efficiency of container bulk cargo loading operations by more than double, while also significantly improving on-site safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one end of the container tilting spreader of this utility model;

[0017] Figure 2 This is a schematic diagram of the other end of the container tilting spreader of this utility model;

[0018] Figure 3 This is a side view of the container tilting spreader of this utility model;

[0019] Figure 4 This is a top view of the container tilting spreader of this utility model;

[0020] Figure 5 This is a schematic diagram of the locking mechanism of the container tilting spreader of this utility model;

[0021] Figure 6 This is a cross-sectional view of the container corner assembly of the container tilting spreader of this utility model;

[0022] Figure 7 This is a cross-sectional view of the transfer lock in the corner assembly of the container tilting spreader of this utility model;

[0023] Figure 8 This is a schematic diagram of the gantry crane pull plate of the container tilting spreader of this utility model;

[0024] Figure 9 This is a schematic diagram of the manual pull plate of the container tilting spreader of this utility model. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0026] Example 1

[0027] See Figure 1 The container tilting spreader includes a support beam assembly, a sling assembly, and a lifting frame 4 arranged sequentially from top to bottom. The support beam assembly is used to connect with the support rope and opening / closing rope of the gantry crane. The sling assembly is used to connect the support beam assembly and the lifting frame 4. The lifting frame 4 is locked to the four corner assemblies 5 located at the four corners of the container top surface through the turnlock lock holes at the four corners of the container top surface. This enables the container to be tilted and lifted by the spreader to complete the unloading operation of bulk container loading.

[0028] The support arm assembly consists of two supports 2, the length of which is adapted to the width of the container. The two supports 2 are arranged horizontally in a parallel and spaced-apart configuration. Each support 2 has two upper lifting lugs at both ends of its top surface and two lower lifting lugs at both ends of its bottom surface. The two upper lifting lugs on the two supports 2 are respectively used to connect to the two support ropes and two opening / closing ropes of the gantry crane, allowing the gantry crane to control the spreader.

[0029] The sling assembly consists of four slings 3, each with a shackle at both the top and bottom. The tops of the four slings 3 are detachably connected to the lower lugs of the two support bars 2 via shackles.

[0030] The lifting frame 4 includes two long beams, two short beams, multiple support beams 11, and four corner assemblies 5. The two long beams and two short beams are alternately and vertically arranged to form a rectangular frame structure. The four corner assemblies 5 are respectively located at the four apex corners of the rectangular frame structure, connecting adjacent long and short beams through the corner assemblies 5 located between them to form a closed frame. The dimensions of the lifting frame 4 are adapted to the dimensions of the container top surface so that the lifting frame can be placed on the container top surface during use. The four corner assemblies 5 on the container correspond one-to-one with the turnlock lock holes located at the four corners of the container top surface; multiple support beams 11 are spaced apart along the length of the lifting frame 4, and the two ends of each support beam 11 are vertically fixed to the opposite side wall of the two long beams of the lifting frame 4, with the top surface of each support beam 11 lower than the top surface of the lifting frame 4; each of the four corner assemblies 5 has an upper lifting lug on its top surface, so that the bottom ends of the four lifting cables 3 are detachably connected to the upper lifting lugs of the four corner assemblies 5 one-to-one through shackles;

[0031] A through hole is provided in the center of the two short beams of the hanging frame 4 along the length of the hanging frame 4. Correspondingly, a U-shaped mounting bracket is provided in the center of the top surface of the support beam 11 near one of the short beams, and a bearing seat 12 is fixed in the center of the top surface of the other support beams 11. The U-shaped mounting bracket has a central shaft hole that is coaxial with the through hole on the short beam. The bearing seat 12 has a central shaft hole that is coaxial with the through hole on the short beam. A drive shaft 8 is horizontally inserted through the through hole of each short beam, and the central shaft hole of the bearing seat on each U-shaped mounting bracket and each support beam 11. The drive shaft 8 is freely rotatable through the rotating bearings provided in each through hole and each central shaft hole.

[0032] As a preferred technical solution in this embodiment, see [link to example]. Figures 1-4 A clamping plate 6 is installed on the outer wall of the two short beams of the lifting frame 4, and two clamping plates 6 are installed at intervals on the outer wall of the two long beams of the lifting frame 4. The clamping plate 6 is specifically composed of a vertical plate and an inclined plate connected from top to bottom. The vertical plate is used to weld and fix the outer wall of the beam. The inclined plate is set at a certain angle outward according to the size difference between the lifting frame 4 and the container, so that the lifting frame 4 set on the top surface of the container is clamped on the top side outer wall of the container by the six clamping plates 6 arranged circumferentially, thereby increasing the connection strength between the lifting frame and the container.

[0033] See Figure 6 and Figure 7 The corner assembly 5 includes a rotary lock 502, a connecting post 503, and a limiting bolt 504 disposed within the housing 501; wherein,

[0034] A mounting plate is horizontally fixed on the inner wall of the housing 501, which is set parallel to the top surface of the lifting frame 4. The mounting plate is provided with a first mounting hole for mounting the rotary lock 502 and a second mounting hole for mounting the limit bolt 504 at intervals along the length direction of the lifting frame 4. A third mounting hole and a fourth mounting hole are provided at intervals on the bottom plate of the housing 501, which are respectively arranged vertically through the first mounting hole and the second mounting hole.

[0035] The rotary lock 502 is integrally formed by connecting a lock head, a lock pin, and a wedge-shaped lock block sequentially from top to bottom; a first connecting sleeve 507 is sleeved and fixed on the outer side of the lock head to limit it at the top of the rotary lock 502; a second connecting sleeve 508 is sleeved and fixed on the upper part of the lock pin, and a connecting plate is formed on the upper side wall of the second connecting sleeve 508, with an axial through hole; a first outer annular boss is provided on the lower side wall of the second connecting sleeve 508; a third connecting sleeve 509 is sleeved in the middle of the lock pin. 09 is inserted and fixed in the first mounting hole, and limited on the mounting plate by the second outer annular protrusion on the top outer wall; the lower part of the locking pin is fitted with a fourth connecting sleeve 510, the top of which is fixedly connected to the bottom of the third connecting sleeve 509, and the bottom of which is inserted and fixed in the third mounting hole; the rotary lock 502 is freely rotatable in the third connecting sleeve 509 and the fourth connecting sleeve 510, and the wedge-shaped locking block at its bottom end is inserted from the third mounting hole to the outside of the housing 501 so as to cooperate with the rotary lock eye provided on the top surface of the container;

[0036] The connecting post 503 is vertically arranged, and its bottom end is inserted into and fixed in the axial through hole opened in the connecting plate; a spherical sleeve is sleeved and fixed on the upper side of the connecting post 503;

[0037] The limiting bolt 504 is a cylindrical body that passes through the second mounting hole and the fourth mounting hole sequentially from top to bottom. A fifth connecting sleeve is fitted and fixed to the top of the limiting bolt 504, so that the limiting bolt 504 is limited to the second mounting hole and the fourth mounting hole through the press-fit between the fifth connecting sleeve and the connecting plate. A third outer annular boss is provided on the outer wall of the fifth connecting sleeve, and the position of the third outer annular boss is adapted to the position of the first outer annular boss. In the initial state, the outer wall of the third outer annular boss is tightly abutted against the outer wall of the first outer annular boss. To restrict the rotation of the rotary lock 502; wherein, the third outer annular boss is preferably a square annular boss that can be tangent to the first annular boss; a spring 505 is sleeved on the middle outer wall of the limiting bolt 504, and the two ends of the spring 505 abut against the mounting plate and the bottom plate of the housing 501 respectively. The bottom end of the limiting bolt 504 is higher than the bottom end of the rotary lock 502, so that when the rotary lock 502 is inserted into the rotary lock eye of the container, the bottom end of the limiting bolt 504 abuts against the top surface of the container and compresses the spring 505 upward, thereby releasing the limiting bolt 504 from restricting the rotation of the rotary lock.

[0038] In actual use, when the lifting frame 4 is placed on the top surface of the container, the rotary lock 502 of the container corner assembly 5 is inserted into the rotary lock eye of the container. At the same time, the bottom end of its limit bolt 504 moves upward because it is against the top surface of the container. In this state, the third outer annular boss is misaligned with the first annular boss, so that the rotary lock 502 becomes a freely rotatable state. The spring 505 is compressed, and after the bottom end of the limit bolt 504 is separated from the container, under the action of the spring 505 which is currently in a compressed state, the limit bolt 504 returns to the initial state and restricts the rotation of the rotary lock 502.

[0039] The two corner assemblies 5 located on each end of the container are connected to the shaft end of the drive shaft 8 located on the same side through a locking mechanism. By rotating the drive shaft 8, the locking mechanism is driven to rotate the rotary lock 502, so that the rotary lock 502 and the rotary lock eye of the container change from the unlocked state to the locked state.

[0040] See Figure 5 The locking mechanism includes a transmission frame and two second transmission rods 1403. The transmission frame includes two parallel, spaced-apart transmission plates 1401, with shaft holes at their centers. The shaft ends of the transmission shaft 8 pass vertically through these shaft holes and are fixed to the two transmission plates 1401. Two first transmission rods 1402 are symmetrically arranged between the two transmission plates 1401 and on both sides of the transmission shaft 8. Specifically, the transmission plates 1401 have mounting holes, allowing both ends of the first transmission rods 1402 to pass through the mounting holes in the two transmission plates 1401. One end of each first transmission rod 1402 is fixed to one transmission plate 1401 by a threaded nut, and the other end passes through... The limiting pin is positioned on another transmission plate 1401; two first transmission rods 1402 are arranged parallel to the transmission shaft 8, with a spherical sleeve centrally fitted and fixed on them; two second transmission rods 1403 are symmetrically arranged on both sides of the transmission frame; each second transmission rod 1403 has a collar at one end that is compatible with the spherical sleeve, and the two collars at both ends of the second transmission rod 1403 are arranged perpendicularly to each other, so that one end of each second transmission rod 1403 is fitted onto the spherical sleeve of the first transmission rod 1402 through the collar, and the other end is fitted onto the spherical sleeve of the connecting column 503 through the collar; wherein, the fitting and engagement of the spherical sleeve and the collar makes the two connecting ends form a universal connection.

[0041] In practical applications, initially, the two second transmission rods 1403 are horizontally positioned, and correspondingly, the two rotary locks 502 are inserted into the rotary lock holes of the container in an unlocked state. When the transmission shaft 8 rotates 90° clockwise, the two second transmission rods 1403 rotate synchronously with the transmission frame and the transmission shaft 8, causing the second transmission rods 1403 to change from a horizontal to an oblique position. During this change, the projected length of the second transmission rods 1403 on the horizontal plane shortens, causing them to simultaneously pull the connecting column towards the transmission shaft 8. 503 also rotates, and then the connecting column 503 synchronously drives the rotary lock 502 to rotate, so that the rotary lock 502 becomes locked with the rotary lock eye of the container. At this time, the spreader is fastened to the container through the four corner assemblies 5. Afterwards, when the gantry crane lifts the container with the spreader, the spreader leaves a gap with the container due to the lifting, so that the limit bolt 504 is reset to the locked state relative to the rotary lock 502 under the action of its outer spring, so as to prevent the locking state of the rotary lock 502 from changing during container lifting and unloading.

[0042] As a preferred technical solution in this embodiment, see [link to example]. Figure 4 An indicator plate 13 is fitted and fixed on the drive shaft 8. In its initial state, the indicator plate 13 is angled to the right to clearly indicate that the spreader and container are currently unlocked. Subsequently, after the drive shaft 8 rotates 90° clockwise, the indicator plate 13 is angled to the left to clearly indicate that the spreader and container are currently locked. Furthermore, on the left and right sides of the adjacent support beam 11 where the indicator plate 13 is located, horizontally fixed indicator signs printed with the characters "Closed" and "Open" are respectively provided for easier operation by personnel in the gantry crane control room. The orientation of the indicator plate 13 can also be opposite to that described in this embodiment.

[0043] See Figure 8A door operator pull plate assembly 7 is sleeved and fixed on the drive shaft 8 located on the U-shaped mounting bracket. The door operator pull plate assembly 7 includes a door operator pull plate 701 and a sliding block 702. The door operator pull plate 701 is a right-angled triangular plate with a through hole 704 at its right-angle apex, through which the door operator pull plate 701 is sleeved and fixed on the drive shaft 8. A strip-shaped through hole 703 parallel to the base of the triangular plate is formed between the two base corners of the door operator pull plate 701, and the width of the through hole at both ends of the strip-shaped through hole 703 is... The width of the sliding block 702 is greater than the width of the other through holes. The sliding block 702 includes two strip-shaped short plates, which are arranged in parallel and symmetrically on both sides of the gantry crane plate 701. They are slidably connected to the gantry crane plate 701 by pins passing through one end of the two strip-shaped short plates and the strip-shaped through holes 703. The other end of the two strip-shaped short plates is connected to one end of the sliding sling. The other end of the sliding sling extends obliquely upward to the adjacent support bar 2 and is fixed to the middle lifting lug 15 set in the middle of the bottom surface of the support bar 2.

[0044] In practical applications, in the initial state, the gantry crane pull plate 701 is fixed to the drive shaft 8 with its bottom edge angled to the right, such as... Figure 1 As shown, at this time, the sliding block 702 is engaged with the upper right end of the strip-shaped through hole 703 on the gantry crane's pull plate 701, and the sliding sling is taut. When the gantry crane controls the spreader to gradually lower to the top of the container, the collision between it and the container causes the sliding block 702 to have the force to slide down along the strip-shaped through hole 703 from the upper right end. As the gantry crane continues to control the spreader to lower one end, the sliding sling changes from a taut state to a slack state, and the sliding block 702 can then slide down through the strip-shaped through hole. The upper right end of 703 slides down to its lower left end and gets stuck on the lower left side of the strip-shaped through hole 703; then the gantry crane lifts the spreader, the sliding sling returns to a taut state, and at the same time lifts the gantry crane pull plate 701, which drives the drive shaft to rotate clockwise, thereby driving the locking mechanism to work and completing the locking connection between the spreader and the container; similarly, when the spreader and the container need to be unlocked, the same steps as above are used to drive the drive shaft to rotate.

[0045] As another preferred technical solution in this embodiment, see Figure 9 One end of the drive shaft 8 extends to the outside of the hanging frame 4, and a manual pull plate 9 is installed on it for use when the gantry pull plate 701 cannot effectively drive the drive shaft 8 to rotate. Specifically, the manual pull plate 9 is a strip-shaped handle with a through hole 902 in the middle, so that the manual pull plate 9 can be inserted through the handle through hole 92 and fixed to the end of the drive shaft 8. The two ends of the manual pull plate 9 are provided with rope holes 903, and a pull rope is inserted and connected to each of the two rope holes 903, so that the on-site operators can pull it as needed to manually complete the requirement of driving the drive shaft 8 to rotate.

[0046] As another preferred technical solution in this embodiment, see Figure 1 A portal frame 10 is centrally located on the support beam 11 with the U-shaped mounting bracket, allowing the sliding sling to be stretched diagonally from the support bar 2 to the rear of the portal frame 10 and then connected to the sliding block 702. The portal frame 10 enables the sliding sling to be turned, so that the sliding sling stretched diagonally above the gantry crane plate 701 becomes vertical after passing through the portal frame 10, ensuring that the sliding block 702 can slide smoothly downward within the strip-shaped through hole 703.

[0047] Example 2

[0048] The specific implementation steps of a bulk container loading and unloading operation using the container tilting spreader of Example 1 are as follows:

[0049] S1. Connect the bottom ends of the two support ropes of the gantry crane to the two upper lifting lugs of the support bar 2 located on the front (closed end) side of the container using shackles. Connect the two opening and closing ropes of the gantry crane to the two upper lifting lugs of the support bar 2 located on the front (door end) side of the container using shackles. Then, the gantry crane moves the spreader to the top of the container to be lifted and aligns the four corner assemblies 5 with the four top corners of the container.

[0050] S2. The gantry crane lowers the support arm assembly so that the spreader is placed horizontally on the top surface of the container. The rotary locks 502 in the four corner assemblies 5 are inserted into the rotary lock holes at the four top corners of the container. In this state, the limit bolts 504 on the adjacent side of each rotary lock 502 move upward, releasing their restriction on the rotation of the rotary lock. The gantry crane continues to lower the support arm assembly so that the sliding rope is in a relaxed and bent state, and the sliding block 702 slides from the upper side of the strip-shaped through hole 703 to its lower end.

[0051] S3. The gantry crane lifts the support arm assembly, restoring the sliding rope to a taut state. During this process, the sliding rope simultaneously lifts the gantry crane pull plate 701. Since the position of the sliding block 702 within the gantry crane pull plate 701 has changed, as the sliding rope lifts the gantry crane pull plate 701, the drive shaft is simultaneously driven to rotate 90° clockwise through the gantry crane pull plate 701. The rotary locks 502 within the four corner assemblies 5 rotate 90° synchronously under the cooperation of the locking mechanism and the drive shaft 8, causing the rotary locks 502 and the rotary lock eye of the container to change from an unlocked state to a locked state.

[0052] S4. The gantry crane continues to lift the support arm assembly, causing the container to leave the ground. Then, the gantry crane controls the lowering length of the two opening and closing ropes to shorten, causing the support arm on the rear side of the container to rise. The container deflects at a high angle in the air, with the door end higher than the other end, allowing the cargo to flow to the lower end without hitting the door. At this time, the bottom end of the limit bolt 504 on the adjacent side of each rotary lock 502 separates from the top surface of the container and moves downward to reset, re-limiting the rotation of the rotary lock 502.

[0053] S5. Open one side door of the container; the gantry crane continues to slowly and synchronously raise the support arm assembly to lift the container to the designated lifting height in an inclined state. Pay attention to the lifting of the container to ensure that it is stable and without shaking; then, the gantry crane uses its slewing mechanism to lift the container to above the designated unloading position on the cargo ship.

[0054] S6. The gantry crane controls the lowering length of the two support ropes to shorten, causing the support bar 2 on the front side of the container to rise. The container deflects at a high angle so that the door end is lower and the other end is higher. At this time, the goods inside the container can be poured onto the cargo ship through the opened door until the goods inside the container are emptied.

[0055] S7. The gantry crane controls the lowering length of the two support ropes to be the same as the current lowering length of the two opening and closing ropes, so that the container is set horizontally and stably in the air; then, the gantry crane uses its slewing mechanism to lift the container back to its original position; and the container is brought to the ground by slowly lowering the support arm assembly.

[0056] S8. The gantry crane slowly lowers the support arm assembly to bring the container to the ground. Then, the gantry crane continues to lower the support arm assembly, so that the sliding rope is in a relaxed and bent state, and the sliding block 702 slides from the upper side of the strip-shaped through hole 703 to its lower end. At this time, as the spreader falls on the top surface of the container again, the limit bolts 504 on the adjacent side of each rotary lock 502 move upward again, releasing their restriction on the rotation of the rotary lock.

[0057] S9. The gantry crane lifts the support arm assembly to restore the sliding rope to a taut state. During this process, the sliding rope simultaneously lifts the gantry crane pull plate 701 to drive the drive shaft to rotate 90° counterclockwise. The rotary locks 502 in the four corner assemblies 5 rotate 90° in the opposite direction in sync with the locking mechanism and the drive shaft 8, so that the rotary locks 502 and the rotary lock eye of the container change from the locked state to the unlocked state.

[0058] S10. The gantry crane continues to lift the support arm assembly, and the spreader separates from the container. At this time, the bottom end of the limit bolt 504 on the adjacent side of each rotary lock 502 also moves downward and resets due to separation from the top surface of the container, thus restricting the rotation of the rotary lock 502 again. The spreader returns to its initial state and can be reused for lifting and unloading the next container.

[0059] In steps S3 and S8 above, if the gantry crane operation cannot complete the rotation drive of the gantry crane pull plate 701 to the drive shaft 8, the ground staff will assist in completing the rotation drive of the drive shaft 8 by pulling the pull rope on the manual pull plate 9, so as to ensure that the operation is completed smoothly.

[0060] In summary, after the container tilting spreader was manufactured, an application experiment was conducted. The experiment showed that the spreader can effectively realize its designed functions. When handling containers, the driver can independently align and lock and release the containers, and tilt the containers. The entire operation does not require the cooperation of workers, avoiding the time spent by workers loading and unloading containers, locking and releasing container locks, reducing wasted time in the operation. Overall, it can improve the efficiency of container bulk cargo loading operations by more than 100%, and significantly improve the safety of on-site operations.

Claims

1. A container tilt spreader, characterized by, The utility model provides a kind of container lifting device, including the support pole group, sling group and lifting frame (4) that are sequentially arranged from top to bottom;Wherein, the support pole group is made of two support poles (2), and two support poles (2) are arranged in parallel in horizontal direction;Two upper lifting lugs are arranged at the top of each support pole (2), and two lower lifting lugs are arranged at the bottom of each support pole (2);The sling group is made of four slings (3), and the top of four slings (3) is connected to the four lower lifting lugs of two support poles (2) respectively, and the bottom of four slings (3) is connected to the four top corners of lifting frame (4) respectively;Lifting frame (4) includes two long beam bodies and two short beam bodies arranged alternately and vertically, and each adjacent two long beam bodies and short beam body are connected and fixed by box corner assembly (5) to form a rectangular frame body;A transmission shaft (8) is horizontally arranged in the through hole in the middle of two short beam bodies, and is arranged freely rotatable;Box corner assembly (5) includes turn lock (502), connecting column (503) and limiting bolt (504) arranged in shell (501);An installation plate is fixed on the inner wall of shell (501) in parallel to the top surface of lifting frame (4), and turn lock (502) and limiting bolt (504) are arranged in parallel to the length direction of lifting frame (4) and are movably assembled on the installation plate, so that turn lock (502) is arranged freely rotatable, limiting bolt (504) is arranged up and down telescopic, limiting bolt (504) is initially limited by the third outer annular boss on the turn lock (502) and the first outer annular boss on the turn lock (502), and is separated from the turn lock (502) when the bottom end of limiting bolt (504) is abutted on the top surface of container and moves upward;Connecting column (503) is arranged adjacent to turn lock (502) and connected with turn lock (502);Two connecting columns (503) at both ends of each short beam body are connected with transmission shaft (8) by a set of locking mechanism, so that two turn locks (502) are rotated to locking state under the cooperation of locking mechanism and connecting column (503) when transmission shaft rotates;Door machine pull plate assembly (7) is arranged on transmission shaft (8) near one side of short beam body;Door machine pull plate assembly (7) includes door machine pull plate (701), which is a right triangle plate, and the right angle corner of the right triangle plate is sleeved and fixed on the transmission shaft (8), and the strip-shaped through hole (703) is arranged between the two bottom corners of the right triangle plate;Sliding block (702) is slidably arranged in the strip-shaped through hole (703), and the sliding block (702) is connected to the middle of the bottom surface of adjacent side support pole (2) by sliding sling.

2. A container tilt spreader according to claim 1, characterised in that, A plurality of support beams (11) are fixed in the rectangular frame body along the length direction of the frame body, and the top surface of each support beam (11) is lower than the top surface of lifting frame (4);U-shaped mounting bracket is arranged in the middle of the top surface of the support beam (11) near one side of short beam body, and shaft seat (12) is fixed in the middle of the top surface of the remaining support beams (11), and coaxial center shaft hole is arranged in the U-shaped mounting bracket and shaft seat (12), and rotating bearing is arranged in the center shaft hole, so that transmission shaft (8) is horizontally arranged and fixed in the rotating bearing in each center shaft hole.

3. The container tilt spreader according to claim 1, wherein, At least one clamping plate (6) is arranged on the outer wall of the two short beam bodies of the hanging frame (4), and at least two clamping plates (6) are arranged on the outer walls of the two long beam bodies of the hanging frame (4) at intervals; the clamping plate (6) is composed of a vertical plate and an inclined plate connected from top to bottom, the vertical plate is fixed on the outer wall of the beam body, and the inclined plate is arranged obliquely outward of the hanging frame (4), and the hanging frame (4) is clamped on the top side outer wall of the container through the plurality of clamping plates (6) arranged in the circumferential direction.

4. The container tilt spreader according to claim 1, wherein, The first mounting hole and the third mounting hole are formed in the bottom plate of the mounting plate and the shell (501) and extend through the mounting plate and the shell (501) from top to bottom; the turn lock (502) is integrally connected by the lock head, the lock column and the wedge-shaped lock block connected in sequence from top to bottom; the second connecting sleeve (508) is sleeved and fixed on the upper part of the lock column, the connecting plate is formed on the upper side wall of the second connecting sleeve (508) and extends outward horizontally, and the first outer annular boss is arranged on the lower side wall of the second connecting sleeve (508); the third connecting sleeve (509) is sleeved on the middle part of the lock column, the third connecting sleeve (509) is inserted and fixed in the first mounting hole and is limited on the mounting plate by the second outer annular boss arranged on the top end outer wall; the fourth connecting sleeve (510) is sleeved on the lower part of the lock column, the top end of the fourth connecting sleeve (510) is fixedly connected with the bottom end of the third connecting sleeve (509), and the bottom end of the fourth connecting sleeve (510) is inserted and fixed in the third mounting hole; the turn lock (502) is freely rotatable in the third connecting sleeve (509) and the fourth connecting sleeve (510), and the wedge-shaped lock block at the bottom end of the turn lock (502) is inserted from the third mounting hole to the outside of the shell (501); the connecting column (503) is vertically arranged and fixed on the connecting plate.

5. The container tilt spreader according to claim 1, wherein, The second mounting hole and the fourth mounting hole are formed in the bottom plate of the mounting plate and the shell (501) and extend through the mounting plate and the shell (501) from top to bottom; the limiting pin (504) is sequentially inserted in the second mounting hole and the fourth mounting hole from top to bottom, the fifth connecting sleeve is sleeved and fixed on the mounting plate by the fifth connecting sleeve arranged on the top end of the limiting pin (504); the third outer annular boss is arranged on the outer wall of the fifth connecting sleeve, and the arrangement position of the third outer annular boss is adapted to the arrangement of the first outer annular boss, so that the outer wall of the third outer annular boss is initially abutted on the outer wall of the first outer annular boss to limit the rotation of the turn lock (502); the spring (505) is sleeved on the limiting pin (504) between the mounting plate and the bottom plate of the shell (501), and the bottom end of the limiting pin (504) is higher than the bottom end of the turn lock (502), so that when the turn lock (502) is inserted into the turn lock eye of the container, the bottom end of the limiting pin (504) is abutted on the top surface of the container and compresses the spring (505) upward to release the rotation limitation of the limiting pin (504) on the turn lock.

6. The container tilt spreader according to claim 1, wherein, The locking mechanism comprises a transmission frame and two second transmission rods (1403); wherein the transmission frame comprises two transmission plates (1401) arranged in parallel and spaced apart, one side shaft end of the transmission shaft (8) is centrally and vertically arranged and fixed on the two transmission plates (1401); two first transmission rods (1402) are symmetrically arranged on both sides of the transmission shaft (8) and fixed between the two transmission plates (1401) in a manner parallel to the transmission shaft (8); two second transmission rods (1403) are symmetrically arranged on both sides of the transmission frame; the two ends of each second transmission rod (1403) are movably connected with the rod body of the first transmission rod (1402) and the column body of the connecting column (503) through universal connecting pieces.

7. The container tilt spreader according to claim 1, wherein, An indicating plate (13) is sleeved and fixed on the transmission shaft (8), which is arranged obliquely to the right or obliquely to the left when the transmission shaft (8) is in the initial state, and is changed to be arranged obliquely to the left or obliquely to the right after the transmission shaft (8) rotates.

8. The container tilt spreader according to claim 1, wherein, One end of the transmission shaft (8) extends to the outside of the hanging frame (4), and an artificial pull plate (9) is sleeved and fixed on the end portion, and the two ends of the artificial pull plate (9) are respectively connected with a pull rope.

9. The container tilt spreader according to claim 1, wherein, A support beam (11) is arranged along the width direction of the hanging frame (4) below the transmission shaft of the door machine pull plate assembly (7), a door-shaped frame (10) is centrally arranged on the support beam (11), so that the door machine pull plate assembly (7) is built-in in the door-shaped frame (10), and the sliding sling is obliquely stretched to the rear side of the door-shaped frame (10) from the support lever (2), and then connected with the sliding block (702).

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